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
26 #include <libfirm/firm.h>
27 #include <libfirm/adt/obst.h>
28 #include <libfirm/be.h>
32 #include "adt/error.h"
33 #include "adt/array.h"
39 #include "diagnostic.h"
40 #include "lang_features.h"
43 #include "entitymap_t.h"
44 #include "driver/firm_opt.h"
45 #include "driver/firm_cmdline.h"
47 /* some idents needed for name mangling */
48 static ident *id_underscore;
51 static ir_type *ir_type_const_char;
52 static ir_type *ir_type_wchar_t;
53 static ir_type *ir_type_void;
54 static ir_type *ir_type_int;
56 static int next_value_number_function;
57 static ir_node *continue_label;
58 static ir_node *break_label;
59 static ir_node *current_switch_cond;
60 static bool saw_default_label;
61 static declaration_t **all_labels;
62 static declaration_t **inner_functions;
63 static int inner_function_idx;
64 static ir_node *ijmp_list;
65 static bool constant_folding;
67 extern bool have_const_functions;
69 static const declaration_t *current_function_decl;
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;
75 static entitymap_t entitymap;
77 static struct obstack asm_obst;
79 typedef enum declaration_kind_t {
80 DECLARATION_KIND_UNKNOWN,
81 DECLARATION_KIND_FUNCTION,
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_COMPOUND_MEMBER,
87 DECLARATION_KIND_LABEL_BLOCK,
88 DECLARATION_KIND_ENUM_ENTRY,
89 DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
90 DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
91 DECLARATION_KIND_TYPE,
92 DECLARATION_KIND_INNER_FUNCTION
95 static ir_type *get_ir_type(type_t *type);
96 static ir_type *get_ir_type_incomplete(type_t *type);
97 static int count_decls_in_stmts(const statement_t *stmt);
99 static void enqueue_inner_function(declaration_t *declaration) {
100 if (inner_functions == NULL) {
101 inner_functions = NEW_ARR_F(declaration_t *, 16);
102 inner_functions[0] = declaration;
103 inner_function_idx = 1;
105 int size = ARR_LEN(inner_functions);
106 if (inner_function_idx >= size) {
107 ARR_RESIZE(declaration_t *, inner_functions, size + 16);
109 inner_functions[inner_function_idx++] = declaration;
113 static declaration_t *next_inner_function(void) {
114 if (inner_function_idx == 0)
116 return inner_functions[--inner_function_idx];
119 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
121 const declaration_t *declaration = get_irg_loc_description(irg, pos);
123 if (declaration != NULL) {
124 warningf(&declaration->source_position,
125 "variable '%#T' might be used uninitialized",
126 declaration->type, declaration->symbol);
128 return new_r_Unknown(irg, mode);
131 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
133 const source_position_t *pos = (const source_position_t*) dbg;
136 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
140 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
142 const source_position_t *pos = (const source_position_t*) dbg;
147 return pos->input_name;
150 static dbg_info *get_dbg_info(const source_position_t *pos)
152 return (dbg_info*) pos;
155 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
157 static ir_mode *mode_int, *mode_uint;
159 static ir_node *_expression_to_firm(const expression_t *expression);
160 static ir_node *expression_to_firm(const expression_t *expression);
161 static inline ir_mode *get_ir_mode(type_t *type);
162 static void create_local_declaration(declaration_t *declaration);
164 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
166 unsigned flags = get_atomic_type_flags(kind);
167 unsigned size = get_atomic_type_size(kind);
168 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
169 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
172 unsigned bit_size = size * 8;
173 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
174 ir_mode_arithmetic arithmetic;
175 unsigned modulo_shift;
177 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
178 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
179 snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
180 sort = irms_int_number;
181 arithmetic = irma_twos_complement;
182 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
184 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
185 snprintf(name, sizeof(name), "f%d", bit_size);
186 sort = irms_float_number;
187 arithmetic = irma_ieee754;
190 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
198 * Initialises the atomic modes depending on the machine size.
200 static void init_atomic_modes(void)
202 for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
203 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
205 mode_int = _atomic_modes[ATOMIC_TYPE_INT];
206 mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
208 /* there's no real void type in firm */
209 _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
211 /* initialize pointer modes */
213 ir_mode_sort sort = irms_reference;
214 unsigned bit_size = machine_size;
216 ir_mode_arithmetic arithmetic = irma_twos_complement;
217 unsigned modulo_shift
218 = bit_size < machine_size ? machine_size : bit_size;
220 snprintf(name, sizeof(name), "p%d", machine_size);
221 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
224 set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
225 set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
227 /* Hmm, pointers should be machine size */
228 set_modeP_data(ptr_mode);
229 set_modeP_code(ptr_mode);
232 static unsigned get_compound_type_size(compound_type_t *type)
234 ir_type *irtype = get_ir_type((type_t*) type);
235 return get_type_size_bytes(irtype);
238 static unsigned get_array_type_size(array_type_t *type)
240 assert(!type->is_vla);
241 ir_type *irtype = get_ir_type((type_t*) type);
242 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);
266 return get_mode_size_bytes(mode_P_data);
268 return get_array_type_size(&type->array);
270 return get_type_size_const(type->builtin.real_type);
272 panic("type size of bitfield request");
278 panic("Trying to determine size of invalid type");
281 static ir_node *get_type_size(type_t *type)
283 type = skip_typeref(type);
285 if (is_type_array(type) && type->array.is_vla) {
286 ir_node *size_node = type->array.size_node;
287 if (size_node == NULL) {
288 size_node = expression_to_firm(type->array.size_expression);
289 assert(!is_Const(size_node));
290 type->array.size_node = size_node;
293 ir_node *elem_size = get_type_size(type->array.element_type);
294 ir_mode *mode = get_irn_mode(size_node);
295 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
299 ir_mode *mode = get_ir_mode(type_size_t);
301 sym.type_p = get_ir_type(type);
302 return new_SymConst(mode, sym, symconst_type_size);
305 static unsigned count_parameters(const function_type_t *function_type)
309 function_parameter_t *parameter = function_type->parameters;
310 for ( ; parameter != NULL; parameter = parameter->next) {
318 * Creates a Firm type for an atomic type
320 static ir_type *create_atomic_type(const atomic_type_t *type)
322 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
323 atomic_type_kind_t kind = type->akind;
324 ir_mode *mode = _atomic_modes[kind];
325 ident *id = get_mode_ident(mode);
326 ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
328 set_type_alignment_bytes(irtype, type->base.alignment);
334 * Creates a Firm type for a complex type
336 static ir_type *create_complex_type(const complex_type_t *type)
338 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
339 atomic_type_kind_t kind = type->akind;
340 ir_mode *mode = _atomic_modes[kind];
341 ident *id = get_mode_ident(mode);
346 /* FIXME: finish the array */
351 * Creates a Firm type for an imaginary type
353 static ir_type *create_imaginary_type(const imaginary_type_t *type)
355 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
356 atomic_type_kind_t kind = type->akind;
357 ir_mode *mode = _atomic_modes[kind];
358 ident *id = get_mode_ident(mode);
359 ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
361 set_type_alignment_bytes(irtype, type->base.alignment);
367 * return type of a parameter (and take transparent union gnu extension into
370 static type_t *get_parameter_type(type_t *type)
372 type = skip_typeref(type);
373 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
374 declaration_t *decl = type->compound.declaration;
375 type = decl->scope.declarations->type;
381 static ir_type *create_method_type(const function_type_t *function_type)
383 type_t *return_type = function_type->return_type;
385 ident *id = id_unique("functiontype.%u");
386 int n_parameters = count_parameters(function_type);
387 int n_results = return_type == type_void ? 0 : 1;
388 dbg_info *dbgi = get_dbg_info(&function_type->base.source_position);
389 ir_type *irtype = new_d_type_method(id, n_parameters, n_results, dbgi);
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. */
434 warningf(&function_type->base.source_position, "THISCALL calling convention not supported 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 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
445 ir_type *ir_type = new_d_type_pointer(id_unique("pointer.%u"),
446 ir_points_to, mode_P_data, dbgi);
451 static ir_type *create_array_type(array_type_t *type)
453 type_t *element_type = type->element_type;
454 ir_type *ir_element_type = get_ir_type(element_type);
456 ident *id = id_unique("array.%u");
457 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
458 ir_type *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
460 const int align = get_type_alignment_bytes(ir_element_type);
461 set_type_alignment_bytes(ir_type, align);
463 if (type->size_constant) {
464 int n_elements = type->size;
466 set_array_bounds_int(ir_type, 0, 0, n_elements);
468 size_t elemsize = get_type_size_bytes(ir_element_type);
469 if (elemsize % align > 0) {
470 elemsize += align - (elemsize % align);
472 set_type_size_bytes(ir_type, n_elements * elemsize);
474 set_array_lower_bound_int(ir_type, 0, 0);
476 set_type_state(ir_type, layout_fixed);
482 * Return the signed integer type of size bits.
484 * @param size the size
486 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
489 static ir_mode *s_modes[64 + 1] = {NULL, };
493 if (size <= 0 || size > 64)
496 mode = s_modes[size];
500 snprintf(name, sizeof(name), "bf_I%u", size);
501 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
502 size <= 32 ? 32 : size );
503 s_modes[size] = mode;
507 snprintf(name, sizeof(name), "I%u", size);
508 ident *id = new_id_from_str(name);
509 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
510 res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
511 set_primitive_base_type(res, base_tp);
517 * Return the unsigned integer type of size bits.
519 * @param size the size
521 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
524 static ir_mode *u_modes[64 + 1] = {NULL, };
528 if (size <= 0 || size > 64)
531 mode = u_modes[size];
535 snprintf(name, sizeof(name), "bf_U%u", size);
536 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
537 size <= 32 ? 32 : size );
538 u_modes[size] = mode;
543 snprintf(name, sizeof(name), "U%u", size);
544 ident *id = new_id_from_str(name);
545 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
546 res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
547 set_primitive_base_type(res, base_tp);
552 static ir_type *create_bitfield_type(bitfield_type_t *const type)
554 type_t *base = skip_typeref(type->base_type);
555 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
556 ir_type *irbase = get_ir_type(base);
558 unsigned size = type->bit_size;
560 assert(!is_type_float(base));
561 if (is_type_signed(base)) {
562 return get_signed_int_type_for_bit_size(irbase, size);
564 return get_unsigned_int_type_for_bit_size(irbase, size);
568 #define INVALID_TYPE ((ir_type_ptr)-1)
571 COMPOUND_IS_STRUCT = false,
572 COMPOUND_IS_UNION = true
576 * Construct firm type from ast struct type.
578 * As anonymous inner structs get flattened to a single firm type, we might get
579 * irtype, outer_offset and out_align passed (they represent the position of
580 * the anonymous inner struct inside the resulting firm struct)
582 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
583 size_t *outer_offset, size_t *outer_align,
584 bool incomplete, bool is_union)
586 declaration_t *declaration = type->declaration;
587 declaration_kind_t kind = (declaration_kind_t)declaration->declaration_kind;
589 if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
590 || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
592 return declaration->v.irtype;
594 size_t align_all = 1;
596 size_t bit_offset = 0;
599 if (irtype == NULL) {
600 symbol_t *symbol = declaration->symbol;
602 if (symbol != NULL) {
603 id = new_id_from_str(symbol->string);
606 id = id_unique("__anonymous_union.%u");
608 id = id_unique("__anonymous_struct.%u");
611 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
614 irtype = new_d_type_union(id, dbgi);
616 irtype = new_d_type_struct(id, dbgi);
619 declaration->declaration_kind
620 = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
621 declaration->v.irtype = irtype;
622 //type->base.firm_type = irtype;
624 offset = *outer_offset;
625 align_all = *outer_align;
631 declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
633 declaration_t *entry = declaration->scope.declarations;
634 for( ; entry != NULL; entry = entry->next) {
635 if (entry->namespc != NAMESPACE_NORMAL)
638 size_t prev_offset = offset;
640 symbol_t *symbol = entry->symbol;
641 type_t *entry_type = skip_typeref(entry->type);
642 dbg_info *dbgi = get_dbg_info(&entry->source_position);
645 if (symbol != NULL) {
646 ident = new_id_from_str(symbol->string);
648 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
649 create_compound_type(&entry_type->compound, irtype, &offset,
650 &align_all, false, COMPOUND_IS_STRUCT);
651 goto finished_member;
652 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
653 create_compound_type(&entry_type->compound, irtype, &offset,
654 &align_all, false, COMPOUND_IS_UNION);
655 goto finished_member;
657 assert(entry_type->kind == TYPE_BITFIELD);
659 ident = id_unique("anon.%u");
662 ir_type *base_irtype;
663 if (entry_type->kind == TYPE_BITFIELD) {
664 base_irtype = get_ir_type(entry_type->bitfield.base_type);
666 base_irtype = get_ir_type(entry_type);
669 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
670 size_t misalign = offset % entry_alignment;
672 ir_type *entry_irtype = get_ir_type(entry_type);
673 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
676 size_t bits_remainder;
677 if (entry_type->kind == TYPE_BITFIELD) {
678 size_t size_bits = entry_type->bitfield.bit_size;
679 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
681 if (size_bits > rest_size_bits) {
682 /* start a new bucket */
683 offset += entry_alignment - misalign;
689 /* put into current bucket */
690 base = offset - misalign;
691 bits_remainder = misalign * 8 + bit_offset;
694 offset += size_bits / 8;
695 bit_offset = bit_offset + (size_bits % 8);
697 size_t entry_size = get_type_size_bytes(base_irtype);
698 if (misalign > 0 || bit_offset > 0)
699 offset += entry_alignment - misalign;
703 offset += entry_size;
707 if (entry_alignment > align_all) {
708 if (entry_alignment % align_all != 0) {
709 panic("uneven alignments not supported yet");
711 align_all = entry_alignment;
714 set_entity_offset(entity, base);
715 set_entity_offset_bits_remainder(entity,
716 (unsigned char) bits_remainder);
717 //add_struct_member(irtype, entity);
718 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
719 assert(entry->v.entity == NULL);
720 entry->v.entity = entity;
724 size_t entry_size = offset - prev_offset;
725 if (entry_size > size) {
737 size_t misalign = offset % align_all;
738 if (misalign > 0 || bit_offset > 0) {
739 size += align_all - misalign;
742 if (outer_offset != NULL) {
744 *outer_offset = offset;
746 *outer_offset += size;
749 if (align_all > *outer_align) {
750 if (align_all % *outer_align != 0) {
751 panic("uneven alignments not supported yet");
753 *outer_align = align_all;
756 set_type_alignment_bytes(irtype, align_all);
757 set_type_size_bytes(irtype, size);
758 set_type_state(irtype, layout_fixed);
764 static ir_type *create_enum_type(enum_type_t *const type)
766 type->base.firm_type = ir_type_int;
768 ir_mode *const mode = mode_int;
769 tarval *const one = get_mode_one(mode);
770 tarval * tv_next = get_tarval_null(mode);
772 bool constant_folding_old = constant_folding;
773 constant_folding = true;
775 declaration_t *declaration = type->declaration->next;
776 for (; declaration != NULL; declaration = declaration->next) {
777 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
780 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
782 expression_t *const init = declaration->init.enum_value;
784 ir_node *const cnst = expression_to_firm(init);
785 if (!is_Const(cnst)) {
786 panic("couldn't fold constant");
788 tv_next = get_Const_tarval(cnst);
790 declaration->v.enum_val = tv_next;
791 tv_next = tarval_add(tv_next, one);
794 constant_folding = constant_folding_old;
799 static ir_type *get_ir_type_incomplete(type_t *type)
801 assert(type != NULL);
802 type = skip_typeref(type);
804 if (type->base.firm_type != NULL) {
805 assert(type->base.firm_type != INVALID_TYPE);
806 return type->base.firm_type;
809 switch (type->kind) {
810 case TYPE_COMPOUND_STRUCT:
811 return create_compound_type(&type->compound, NULL, NULL, NULL,
812 true, COMPOUND_IS_STRUCT);
813 case TYPE_COMPOUND_UNION:
814 return create_compound_type(&type->compound, NULL, NULL, NULL,
815 true, COMPOUND_IS_UNION);
817 return get_ir_type(type);
821 static ir_type *get_ir_type(type_t *type)
823 assert(type != NULL);
825 type = skip_typeref(type);
827 if (type->base.firm_type != NULL) {
828 assert(type->base.firm_type != INVALID_TYPE);
829 return type->base.firm_type;
832 ir_type *firm_type = NULL;
833 switch (type->kind) {
835 /* Happens while constant folding, when there was an error */
836 return create_atomic_type(&type_void->atomic);
839 firm_type = create_atomic_type(&type->atomic);
842 firm_type = create_complex_type(&type->complex);
845 firm_type = create_imaginary_type(&type->imaginary);
848 firm_type = create_method_type(&type->function);
851 firm_type = create_pointer_type(&type->pointer);
854 firm_type = create_array_type(&type->array);
856 case TYPE_COMPOUND_STRUCT:
857 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
858 false, COMPOUND_IS_STRUCT);
860 case TYPE_COMPOUND_UNION:
861 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
862 false, COMPOUND_IS_UNION);
865 firm_type = create_enum_type(&type->enumt);
868 firm_type = get_ir_type(type->builtin.real_type);
871 firm_type = create_bitfield_type(&type->bitfield);
879 if (firm_type == NULL)
880 panic("unknown type found");
882 type->base.firm_type = firm_type;
886 static inline ir_mode *get_ir_mode(type_t *type)
888 ir_type *irtype = get_ir_type(type);
890 /* firm doesn't report a mode for arrays somehow... */
891 if (is_Array_type(irtype)) {
895 ir_mode *mode = get_type_mode(irtype);
896 assert(mode != NULL);
900 /** Names of the runtime functions. */
901 static const struct {
902 int id; /**< the rts id */
903 int n_res; /**< number of return values */
904 const char *name; /**< the name of the rts function */
905 int n_params; /**< number of parameters */
906 unsigned flags; /**< language flags */
908 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
909 { rts_abort, 0, "abort", 0, _C89 },
910 { rts_alloca, 1, "alloca", 1, _ALL },
911 { rts_abs, 1, "abs", 1, _C89 },
912 { rts_labs, 1, "labs", 1, _C89 },
913 { rts_llabs, 1, "llabs", 1, _C99 },
914 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
916 { rts_fabs, 1, "fabs", 1, _C89 },
917 { rts_sqrt, 1, "sqrt", 1, _C89 },
918 { rts_cbrt, 1, "cbrt", 1, _C99 },
919 { rts_exp, 1, "exp", 1, _C89 },
920 { rts_exp2, 1, "exp2", 1, _C89 },
921 { rts_exp10, 1, "exp10", 1, _GNUC },
922 { rts_log, 1, "log", 1, _C89 },
923 { rts_log2, 1, "log2", 1, _C89 },
924 { rts_log10, 1, "log10", 1, _C89 },
925 { rts_pow, 1, "pow", 2, _C89 },
926 { rts_sin, 1, "sin", 1, _C89 },
927 { rts_cos, 1, "cos", 1, _C89 },
928 { rts_tan, 1, "tan", 1, _C89 },
929 { rts_asin, 1, "asin", 1, _C89 },
930 { rts_acos, 1, "acos", 1, _C89 },
931 { rts_atan, 1, "atan", 1, _C89 },
932 { rts_sinh, 1, "sinh", 1, _C89 },
933 { rts_cosh, 1, "cosh", 1, _C89 },
934 { rts_tanh, 1, "tanh", 1, _C89 },
936 { rts_fabsf, 1, "fabsf", 1, _C99 },
937 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
938 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
939 { rts_expf, 1, "expf", 1, _C99 },
940 { rts_exp2f, 1, "exp2f", 1, _C99 },
941 { rts_exp10f, 1, "exp10f", 1, _GNUC },
942 { rts_logf, 1, "logf", 1, _C99 },
943 { rts_log2f, 1, "log2f", 1, _C99 },
944 { rts_log10f, 1, "log10f", 1, _C99 },
945 { rts_powf, 1, "powf", 2, _C99 },
946 { rts_sinf, 1, "sinf", 1, _C99 },
947 { rts_cosf, 1, "cosf", 1, _C99 },
948 { rts_tanf, 1, "tanf", 1, _C99 },
949 { rts_asinf, 1, "asinf", 1, _C99 },
950 { rts_acosf, 1, "acosf", 1, _C99 },
951 { rts_atanf, 1, "atanf", 1, _C99 },
952 { rts_sinhf, 1, "sinhf", 1, _C99 },
953 { rts_coshf, 1, "coshf", 1, _C99 },
954 { rts_tanhf, 1, "tanhf", 1, _C99 },
956 { rts_fabsl, 1, "fabsl", 1, _C99 },
957 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
958 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
959 { rts_expl, 1, "expl", 1, _C99 },
960 { rts_exp2l, 1, "exp2l", 1, _C99 },
961 { rts_exp10l, 1, "exp10l", 1, _GNUC },
962 { rts_logl, 1, "logl", 1, _C99 },
963 { rts_log2l, 1, "log2l", 1, _C99 },
964 { rts_log10l, 1, "log10l", 1, _C99 },
965 { rts_powl, 1, "powl", 2, _C99 },
966 { rts_sinl, 1, "sinl", 1, _C99 },
967 { rts_cosl, 1, "cosl", 1, _C99 },
968 { rts_tanl, 1, "tanl", 1, _C99 },
969 { rts_asinl, 1, "asinl", 1, _C99 },
970 { rts_acosl, 1, "acosl", 1, _C99 },
971 { rts_atanl, 1, "atanl", 1, _C99 },
972 { rts_sinhl, 1, "sinhl", 1, _C99 },
973 { rts_coshl, 1, "coshl", 1, _C99 },
974 { rts_tanhl, 1, "tanhl", 1, _C99 },
976 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
977 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
978 { rts_strcmp, 1, "strcmp", 2, _C89 },
979 { rts_strncmp, 1, "strncmp", 3, _C89 }
982 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
985 * Mangles an entity linker (ld) name for win32 usage.
987 * @param ent the entity to be mangled
988 * @param declaration the declaration
990 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
994 if (is_Method_type(get_entity_type(ent)))
995 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
997 /* always add an underscore in win32 */
998 id = mangle(id_underscore, get_entity_ident(ent));
1001 decl_modifiers_t decl_modifiers = declaration->modifiers;
1002 if (decl_modifiers & DM_DLLIMPORT) {
1003 /* add prefix for imported symbols */
1004 id = mangle(id_imp, id);
1010 * Mangles an entity linker (ld) name for Linux ELF usage.
1012 * @param ent the entity to be mangled
1013 * @param declaration the declaration
1015 static ident *create_ld_ident_linux_elf(ir_entity *entity,
1016 declaration_t *declaration)
1019 return get_entity_ident(entity);
1023 * Mangles an entity linker (ld) name for Mach-O usage.
1025 * @param ent the entity to be mangled
1026 * @param declaration the declaration
1028 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1031 ident *id = mangle(id_underscore, get_entity_ident(ent));
1035 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1036 declaration_t *declaration);
1037 create_ld_ident_func create_ld_ident = create_ld_ident_linux_elf;
1040 * Handle GNU attributes for entities
1042 * @param ent the entity
1043 * @param decl the routine declaration
1045 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1047 if (decl->modifiers & DM_PURE) {
1048 /* TRUE if the declaration includes the GNU
1049 __attribute__((pure)) specifier. */
1050 set_entity_additional_property(ent, mtp_property_pure);
1052 if (decl->modifiers & DM_CONST) {
1053 set_entity_additional_property(ent, mtp_property_const);
1054 have_const_functions = true;
1056 if (decl->modifiers & DM_USED) {
1057 /* TRUE if the declaration includes the GNU
1058 __attribute__((used)) specifier. */
1059 set_entity_stickyness(ent, stickyness_sticky);
1064 * Creates an entity representing a function.
1066 * @param declaration the function declaration
1068 static ir_entity *get_function_entity(declaration_t *declaration)
1070 if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION ||
1071 declaration->declaration_kind == DECLARATION_KIND_INNER_FUNCTION)
1072 return declaration->v.entity;
1073 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1075 symbol_t *symbol = declaration->symbol;
1076 ident *id = new_id_from_str(symbol->string);
1078 ir_type *global_type = get_glob_type();
1079 ir_type *ir_type_method = get_ir_type(declaration->type);
1080 assert(is_Method_type(ir_type_method));
1082 /* already an entity defined? */
1083 ir_entity *entity = entitymap_get(&entitymap, symbol);
1084 if (entity != NULL) {
1085 if (get_entity_visibility(entity) == visibility_external_allocated
1086 && declaration->init.statement != NULL) {
1087 set_entity_visibility(entity, visibility_external_visible);
1089 goto entity_created;
1092 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1093 entity = new_d_entity(global_type, id, ir_type_method, dbgi);
1094 set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1096 handle_gnu_attributes_ent(entity, declaration);
1098 /* static inline => local
1099 * extern inline => local
1100 * inline without definition => local
1101 * inline with definition => external_visible */
1102 storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1103 bool const is_inline = declaration->is_inline;
1104 bool const has_body = declaration->init.statement != NULL;
1105 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1106 set_entity_visibility(entity, visibility_external_visible);
1107 } else if (storage_class == STORAGE_CLASS_STATIC ||
1108 (is_inline && has_body)) {
1110 /* this entity was declared, but is defined nowhere */
1111 set_entity_peculiarity(entity, peculiarity_description);
1113 set_entity_visibility(entity, visibility_local);
1114 } else if (has_body) {
1115 set_entity_visibility(entity, visibility_external_visible);
1117 set_entity_visibility(entity, visibility_external_allocated);
1119 set_entity_allocation(entity, allocation_static);
1121 /* We should check for file scope here, but as long as we compile C only
1122 this is not needed. */
1123 if (! firm_opt.freestanding) {
1124 /* check for a known runtime function */
1125 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1126 if (id != rts_idents[i])
1129 /* ignore those rts functions not necessary needed for current mode */
1130 if ((c_mode & rts_data[i].flags) == 0)
1132 assert(rts_entities[rts_data[i].id] == NULL);
1133 rts_entities[rts_data[i].id] = entity;
1137 entitymap_insert(&entitymap, symbol, entity);
1140 declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1141 declaration->v.entity = entity;
1147 * Creates a Const node representing a constant.
1149 static ir_node *const_to_firm(const const_expression_t *cnst)
1151 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1152 ir_mode *mode = get_ir_mode(cnst->base.type);
1157 if (mode_is_float(mode)) {
1158 tv = new_tarval_from_double(cnst->v.float_value, mode);
1160 if (mode_is_signed(mode)) {
1161 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1163 len = snprintf(buf, sizeof(buf), "%llu",
1164 (unsigned long long) cnst->v.int_value);
1166 tv = new_tarval_from_str(buf, len, mode);
1169 return new_d_Const(dbgi, mode, tv);
1173 * Creates a Const node representing a character constant.
1175 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1177 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1178 ir_mode *mode = get_ir_mode(cnst->base.type);
1180 long long int v = 0;
1181 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1182 if (char_is_signed) {
1183 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1185 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1189 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1190 tarval *tv = new_tarval_from_str(buf, len, mode);
1192 return new_d_Const(dbgi, mode, tv);
1196 * Creates a Const node representing a wide character constant.
1198 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1200 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1201 ir_mode *mode = get_ir_mode(cnst->base.type);
1203 long long int v = cnst->v.wide_character.begin[0];
1206 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1207 tarval *tv = new_tarval_from_str(buf, len, mode);
1209 return new_d_Const(dbgi, mode, tv);
1213 * Creates a SymConst for a given entity.
1215 * @param dbgi debug info
1216 * @param mode the (reference) mode for the SymConst
1217 * @param entity the entity
1219 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1222 assert(entity != NULL);
1223 union symconst_symbol sym;
1224 sym.entity_p = entity;
1225 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1229 * Creates a SymConst node representing a string constant.
1231 * @param src_pos the source position of the string constant
1232 * @param id_prefix a prefix for the name of the generated string constant
1233 * @param value the value of the string constant
1235 static ir_node *string_to_firm(const source_position_t *const src_pos,
1236 const char *const id_prefix,
1237 const string_t *const value)
1239 ir_type *const global_type = get_glob_type();
1240 dbg_info *const dbgi = get_dbg_info(src_pos);
1241 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1242 ir_type_const_char, dbgi);
1244 ident *const id = id_unique(id_prefix);
1245 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1246 set_entity_ld_ident(entity, id);
1247 set_entity_variability(entity, variability_constant);
1248 set_entity_allocation(entity, allocation_static);
1250 ir_type *const elem_type = ir_type_const_char;
1251 ir_mode *const mode = get_type_mode(elem_type);
1253 const char* const string = value->begin;
1254 const size_t slen = value->size;
1256 set_array_lower_bound_int(type, 0, 0);
1257 set_array_upper_bound_int(type, 0, slen);
1258 set_type_size_bytes(type, slen);
1259 set_type_state(type, layout_fixed);
1261 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1262 for(size_t i = 0; i < slen; ++i) {
1263 tvs[i] = new_tarval_from_long(string[i], mode);
1266 set_array_entity_values(entity, tvs, slen);
1269 return create_symconst(dbgi, mode_P_data, entity);
1273 * Creates a SymConst node representing a string literal.
1275 * @param literal the string literal
1277 static ir_node *string_literal_to_firm(
1278 const string_literal_expression_t* literal)
1280 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1285 * Creates a SymConst node representing a wide string literal.
1287 * @param literal the wide string literal
1289 static ir_node *wide_string_literal_to_firm(
1290 const wide_string_literal_expression_t* const literal)
1292 ir_type *const global_type = get_glob_type();
1293 ir_type *const elem_type = ir_type_wchar_t;
1294 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1295 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1298 ident *const id = id_unique("Lstr.%u");
1299 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1300 set_entity_ld_ident(entity, id);
1301 set_entity_variability(entity, variability_constant);
1302 set_entity_allocation(entity, allocation_static);
1304 ir_mode *const mode = get_type_mode(elem_type);
1306 const wchar_rep_t *const string = literal->value.begin;
1307 const size_t slen = literal->value.size;
1309 set_array_lower_bound_int(type, 0, 0);
1310 set_array_upper_bound_int(type, 0, slen);
1311 set_type_size_bytes(type, slen);
1312 set_type_state(type, layout_fixed);
1314 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1315 for(size_t i = 0; i < slen; ++i) {
1316 tvs[i] = new_tarval_from_long(string[i], mode);
1319 set_array_entity_values(entity, tvs, slen);
1322 return create_symconst(dbgi, mode_P_data, entity);
1325 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1326 ir_node *const addr)
1328 ir_type *irtype = get_ir_type(type);
1329 if (is_compound_type(irtype)
1330 || is_Method_type(irtype)
1331 || is_Array_type(irtype)) {
1335 ir_mode *const mode = get_type_mode(irtype);
1336 ir_node *const memory = get_store();
1337 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1338 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1339 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1341 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1342 set_Load_volatility(load, volatility_is_volatile);
1345 set_store(load_mem);
1350 * Creates a strict Conv if neccessary.
1352 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1354 ir_mode *mode = get_irn_mode(node);
1356 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1358 if (!mode_is_float(mode))
1361 /* check if there is already a Conv */
1362 if (is_Conv(node)) {
1363 /* convert it into a strict Conv */
1364 set_Conv_strict(node, 1);
1368 /* otherwise create a new one */
1369 return new_d_strictConv(dbgi, node, mode);
1372 static ir_node *get_global_var_address(dbg_info *const dbgi,
1373 const declaration_t *const decl)
1375 assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1377 ir_entity *const entity = decl->v.entity;
1378 switch ((storage_class_tag_t)decl->storage_class) {
1379 case STORAGE_CLASS_THREAD:
1380 case STORAGE_CLASS_THREAD_EXTERN:
1381 case STORAGE_CLASS_THREAD_STATIC: {
1382 ir_node *const no_mem = new_NoMem();
1383 ir_node *const tls = get_irg_tls(current_ir_graph);
1384 return new_d_simpleSel(dbgi, no_mem, tls, entity);
1388 return create_symconst(dbgi, mode_P_data, entity);
1393 * Returns the correct base address depending on whether it is a parameter or a
1394 * normal local variable.
1396 static ir_node *get_local_frame(ir_entity *const ent)
1398 ir_graph *const irg = current_ir_graph;
1399 const ir_type *const owner = get_entity_owner(ent);
1400 if (owner == get_irg_frame_type(irg)) {
1401 return get_irg_frame(irg);
1403 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1404 return get_irg_value_param_base(irg);
1408 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1410 ir_mode *value_mode = get_irn_mode(value);
1412 if (value_mode == dest_mode || is_Bad(value))
1415 if (dest_mode == mode_b) {
1416 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1417 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1418 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1422 return new_d_Conv(dbgi, value, dest_mode);
1426 * Keep all memory edges of the given block.
1428 static void keep_all_memory(ir_node *block) {
1429 ir_node *old = get_cur_block();
1431 set_cur_block(block);
1432 keep_alive(get_store());
1433 /* TODO: keep all memory edges from restricted pointers */
1437 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1439 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1440 declaration_t *declaration = ref->declaration;
1441 type_t *type = skip_typeref(declaration->type);
1443 /* make sure the type is constructed */
1444 (void) get_ir_type(type);
1446 switch ((declaration_kind_t)declaration->declaration_kind) {
1447 case DECLARATION_KIND_TYPE:
1448 case DECLARATION_KIND_UNKNOWN:
1451 case DECLARATION_KIND_ENUM_ENTRY: {
1452 ir_mode *const mode = get_ir_mode(type);
1453 if (ref->is_outer_ref) {
1454 /* reference to an outer variable */
1455 panic("Outer variable reference not implemented");
1457 return new_Const(mode, declaration->v.enum_val);
1461 case DECLARATION_KIND_LOCAL_VARIABLE: {
1462 ir_mode *const mode = get_ir_mode(type);
1463 return get_value(declaration->v.value_number, mode);
1465 case DECLARATION_KIND_FUNCTION: {
1466 ir_mode *const mode = get_ir_mode(type);
1467 return create_symconst(dbgi, mode, declaration->v.entity);
1469 case DECLARATION_KIND_INNER_FUNCTION: {
1470 ir_mode *const mode = get_ir_mode(type);
1471 if (! declaration->goto_to_outer && !declaration->need_closure) {
1472 /* inner function not using the closure */
1473 return create_symconst(dbgi, mode, declaration->v.entity);
1475 /* TODO: need trampoline here */
1476 panic("Trampoline code not implemented");
1477 return create_symconst(dbgi, mode, declaration->v.entity);
1480 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1481 ir_node *const addr = get_global_var_address(dbgi, declaration);
1482 return deref_address(dbgi, declaration->type, addr);
1485 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1486 ir_entity *entity = declaration->v.entity;
1487 ir_node *frame = get_local_frame(entity);
1488 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1489 return deref_address(dbgi, declaration->type, sel);
1492 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1493 return declaration->v.vla_base;
1495 case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1496 case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1497 case DECLARATION_KIND_COMPOUND_MEMBER:
1498 case DECLARATION_KIND_LABEL_BLOCK:
1499 panic("not implemented reference type");
1502 panic("reference to declaration with unknown type found");
1505 static ir_node *reference_addr(const reference_expression_t *ref)
1507 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1508 declaration_t *declaration = ref->declaration;
1510 switch((declaration_kind_t) declaration->declaration_kind) {
1511 case DECLARATION_KIND_TYPE:
1512 case DECLARATION_KIND_UNKNOWN:
1514 case DECLARATION_KIND_LOCAL_VARIABLE:
1515 /* you can store to a local variable (so we don't panic but return NULL
1516 * as an indicator for no real address) */
1518 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1519 ir_node *const addr = get_global_var_address(dbgi, declaration);
1522 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1523 ir_entity *entity = declaration->v.entity;
1524 ir_node *frame = get_local_frame(entity);
1525 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1530 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1531 return declaration->v.vla_base;
1533 case DECLARATION_KIND_ENUM_ENTRY:
1534 panic("trying to reference enum entry");
1536 case DECLARATION_KIND_FUNCTION:
1537 case DECLARATION_KIND_INNER_FUNCTION:
1538 case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1539 case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1540 case DECLARATION_KIND_COMPOUND_MEMBER:
1541 case DECLARATION_KIND_LABEL_BLOCK:
1542 panic("not implemented reference type");
1545 panic("reference to declaration with unknown type found");
1549 * Transform calls to builtin functions.
1551 static ir_node *process_builtin_call(const call_expression_t *call)
1553 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1555 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1556 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1558 type_t *type = skip_typeref(builtin->base.type);
1559 assert(is_type_pointer(type));
1561 type_t *function_type = skip_typeref(type->pointer.points_to);
1562 symbol_t *symbol = builtin->symbol;
1564 switch(symbol->ID) {
1565 case T___builtin_alloca: {
1566 if (call->arguments == NULL || call->arguments->next != NULL) {
1567 panic("invalid number of parameters on __builtin_alloca");
1569 expression_t *argument = call->arguments->expression;
1570 ir_node *size = expression_to_firm(argument);
1572 ir_node *store = get_store();
1573 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1575 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1577 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1581 case T___builtin_huge_val: {
1582 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1583 tarval *tv = get_mode_infinite(mode);
1584 ir_node *res = new_d_Const(dbgi, mode, tv);
1587 case T___builtin_nan:
1588 case T___builtin_nanf:
1589 case T___builtin_nand: {
1590 /* Ignore string for now... */
1591 assert(is_type_function(function_type));
1592 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1593 tarval *tv = get_mode_NAN(mode);
1594 ir_node *res = new_d_Const(dbgi, mode, tv);
1597 case T___builtin_va_end:
1600 panic("Unsupported builtin found\n");
1605 * Transform a call expression.
1606 * Handles some special cases, like alloca() calls, which must be resolved
1607 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1608 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1611 static ir_node *call_expression_to_firm(const call_expression_t *call)
1613 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1614 assert(get_cur_block() != NULL);
1616 expression_t *function = call->function;
1617 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1618 return process_builtin_call(call);
1620 if (function->kind == EXPR_REFERENCE) {
1621 const reference_expression_t *ref = &function->reference;
1622 declaration_t *declaration = ref->declaration;
1624 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1625 if (declaration->v.entity == rts_entities[rts_alloca]) {
1626 /* handle alloca() call */
1627 expression_t *argument = call->arguments->expression;
1628 ir_node *size = expression_to_firm(argument);
1630 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1632 ir_node *store = get_store();
1633 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1634 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1636 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1638 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1644 ir_node *callee = expression_to_firm(function);
1646 type_t *type = skip_typeref(function->base.type);
1647 assert(is_type_pointer(type));
1648 pointer_type_t *pointer_type = &type->pointer;
1649 type_t *points_to = skip_typeref(pointer_type->points_to);
1650 assert(is_type_function(points_to));
1651 function_type_t *function_type = &points_to->function;
1653 int n_parameters = 0;
1654 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1655 ir_type *new_method_type = NULL;
1656 if (function_type->variadic || function_type->unspecified_parameters) {
1657 const call_argument_t *argument = call->arguments;
1658 for( ; argument != NULL; argument = argument->next) {
1662 /* we need to construct a new method type matching the call
1664 int n_res = get_method_n_ress(ir_method_type);
1665 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1666 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1667 n_parameters, n_res, dbgi);
1668 set_method_calling_convention(new_method_type,
1669 get_method_calling_convention(ir_method_type));
1670 set_method_additional_properties(new_method_type,
1671 get_method_additional_properties(ir_method_type));
1672 set_method_variadicity(new_method_type,
1673 get_method_variadicity(ir_method_type));
1675 for(int i = 0; i < n_res; ++i) {
1676 set_method_res_type(new_method_type, i,
1677 get_method_res_type(ir_method_type, i));
1679 argument = call->arguments;
1680 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1681 expression_t *expression = argument->expression;
1682 ir_type *irtype = get_ir_type(expression->base.type);
1683 set_method_param_type(new_method_type, i, irtype);
1685 ir_method_type = new_method_type;
1687 n_parameters = get_method_n_params(ir_method_type);
1690 ir_node *in[n_parameters];
1692 const call_argument_t *argument = call->arguments;
1693 for(int n = 0; n < n_parameters; ++n) {
1694 expression_t *expression = argument->expression;
1695 ir_node *arg_node = expression_to_firm(expression);
1697 arg_node = do_strict_conv(dbgi, arg_node);
1701 argument = argument->next;
1704 ir_node *store = get_store();
1705 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1707 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1710 type_t *return_type = skip_typeref(function_type->return_type);
1711 ir_node *result = NULL;
1713 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1715 if (is_type_scalar(return_type)) {
1716 mode = get_ir_mode(return_type);
1720 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1721 result = new_d_Proj(dbgi, resproj, mode, 0);
1724 if (function->kind == EXPR_REFERENCE &&
1725 function->reference.declaration->modifiers & DM_NORETURN) {
1726 /* A dead end: Keep the Call and the Block. Also place all further
1727 * nodes into a new and unreachable block. */
1729 keep_alive(get_cur_block());
1736 static void statement_to_firm(statement_t *statement);
1737 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1739 static ir_node *expression_to_addr(const expression_t *expression);
1740 static ir_node *create_condition_evaluation(const expression_t *expression,
1741 ir_node *true_block,
1742 ir_node *false_block);
1744 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1747 value = do_strict_conv(dbgi, value);
1749 ir_node *memory = get_store();
1751 if (is_type_scalar(type)) {
1752 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1753 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1754 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1755 set_Store_volatility(store, volatility_is_volatile);
1756 set_store(store_mem);
1758 ir_type *irtype = get_ir_type(type);
1759 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1760 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1761 set_store(copyb_mem);
1765 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1767 tarval *all_one = get_mode_all_one(mode);
1768 int mode_size = get_mode_size_bits(mode);
1770 assert(offset >= 0);
1772 assert(offset + size <= mode_size);
1773 if (size == mode_size) {
1777 long shiftr = get_mode_size_bits(mode) - size;
1778 long shiftl = offset;
1779 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1780 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1781 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1782 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1787 static void bitfield_store_to_firm(const select_expression_t *expression,
1788 ir_node *addr, ir_node *value)
1790 type_t *type = expression->base.type;
1791 ir_mode *mode = get_ir_mode(type);
1793 assert(get_irn_mode(value) == mode || is_Bad(value));
1795 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1797 /* kill upper bits of value and shift to right position */
1798 ir_entity *entity = expression->compound_entry->v.entity;
1799 int bitoffset = get_entity_offset_bits_remainder(entity);
1800 ir_type *entity_type = get_entity_type(entity);
1801 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1803 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1804 ir_node *mask_node = new_d_Const(dbgi, mode, mask);
1805 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1806 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1807 ir_node *shiftcount = new_d_Const(dbgi, mode_uint, shiftl);
1808 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1810 /* load current value */
1811 ir_node *mem = get_store();
1812 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1813 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1814 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1815 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1816 tarval *inv_mask = tarval_not(shift_mask);
1817 ir_node *inv_mask_node = new_d_Const(dbgi, mode, inv_mask);
1818 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1820 /* construct new value and store */
1821 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1822 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1823 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1824 set_store(store_mem);
1826 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1827 set_Load_volatility(load, volatility_is_volatile);
1828 set_Store_volatility(store, volatility_is_volatile);
1832 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1835 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1836 type_t *type = expression->base.type;
1837 ir_mode *mode = get_ir_mode(type);
1838 ir_node *mem = get_store();
1839 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1840 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1841 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1843 load_res = create_conv(dbgi, load_res, mode_int);
1845 set_store(load_mem);
1847 /* kill upper bits */
1848 ir_entity *entity = expression->compound_entry->v.entity;
1849 int bitoffset = get_entity_offset_bits_remainder(entity);
1850 ir_type *entity_type = get_entity_type(entity);
1851 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1852 long shift_bitsl = machine_size - bitoffset - bitsize;
1853 assert(shift_bitsl >= 0);
1854 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1855 ir_node *countl = new_d_Const(dbgi, mode_uint, tvl);
1856 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1858 long shift_bitsr = bitoffset + shift_bitsl;
1859 assert(shift_bitsr <= (long) machine_size);
1860 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1861 ir_node *countr = new_d_Const(dbgi, mode_uint, tvr);
1863 if (mode_is_signed(mode)) {
1864 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1866 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1869 return create_conv(dbgi, shiftr, mode);
1872 static void set_value_for_expression_addr(const expression_t *expression,
1873 ir_node *value, ir_node *addr)
1875 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1876 value = do_strict_conv(dbgi, value);
1878 if (expression->kind == EXPR_REFERENCE) {
1879 const reference_expression_t *ref = &expression->reference;
1881 declaration_t *declaration = ref->declaration;
1882 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1883 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1884 set_value(declaration->v.value_number, value);
1890 addr = expression_to_addr(expression);
1892 type_t *type = skip_typeref(expression->base.type);
1894 if (expression->kind == EXPR_SELECT) {
1895 const select_expression_t *select = &expression->select;
1897 declaration_t *declaration = select->compound_entry;
1898 if (declaration->type->kind == TYPE_BITFIELD) {
1899 bitfield_store_to_firm(select, addr, value);
1904 assign_value(dbgi, addr, type, value);
1907 static void set_value_for_expression(const expression_t *expression,
1910 set_value_for_expression_addr(expression, value, NULL);
1913 static ir_node *get_value_from_lvalue(const expression_t *expression,
1916 if (expression->kind == EXPR_REFERENCE) {
1917 const reference_expression_t *ref = &expression->reference;
1919 declaration_t *declaration = ref->declaration;
1920 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1921 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1922 assert(addr == NULL);
1923 ir_mode *mode = get_ir_mode(expression->base.type);
1924 return get_value(declaration->v.value_number, mode);
1928 assert(addr != NULL);
1929 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1932 if (expression->kind == EXPR_SELECT &&
1933 expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1934 value = bitfield_extract_to_firm(&expression->select, addr);
1936 value = deref_address(dbgi, expression->base.type, addr);
1943 static ir_node *create_incdec(const unary_expression_t *expression)
1945 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1946 const expression_t *value_expr = expression->value;
1947 ir_node *addr = expression_to_addr(value_expr);
1948 ir_node *value = get_value_from_lvalue(value_expr, addr);
1950 type_t *type = skip_typeref(expression->base.type);
1951 ir_mode *mode = get_ir_mode(expression->base.type);
1954 if (is_type_pointer(type)) {
1955 pointer_type_t *pointer_type = &type->pointer;
1956 offset = get_type_size(pointer_type->points_to);
1958 assert(is_type_arithmetic(type));
1959 offset = new_Const(mode, get_mode_one(mode));
1963 ir_node *store_value;
1964 switch(expression->base.kind) {
1965 case EXPR_UNARY_POSTFIX_INCREMENT:
1967 store_value = new_d_Add(dbgi, value, offset, mode);
1969 case EXPR_UNARY_POSTFIX_DECREMENT:
1971 store_value = new_d_Sub(dbgi, value, offset, mode);
1973 case EXPR_UNARY_PREFIX_INCREMENT:
1974 result = new_d_Add(dbgi, value, offset, mode);
1975 store_value = result;
1977 case EXPR_UNARY_PREFIX_DECREMENT:
1978 result = new_d_Sub(dbgi, value, offset, mode);
1979 store_value = result;
1982 panic("no incdec expr in create_incdec");
1985 set_value_for_expression_addr(value_expr, store_value, addr);
1990 static bool is_local_variable(expression_t *expression)
1992 if (expression->kind != EXPR_REFERENCE)
1994 reference_expression_t *ref_expr = &expression->reference;
1995 declaration_t *declaration = ref_expr->declaration;
1996 return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1999 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2002 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2003 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2004 case EXPR_BINARY_NOTEQUAL:
2005 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2006 case EXPR_BINARY_ISLESS:
2007 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2008 case EXPR_BINARY_ISLESSEQUAL:
2009 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2010 case EXPR_BINARY_ISGREATER:
2011 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2012 case EXPR_BINARY_ISGREATEREQUAL:
2013 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2014 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2019 panic("trying to get pn_Cmp from non-comparison binexpr type");
2023 * Handle the assume optimizer hint: check if a Confirm
2024 * node can be created.
2026 * @param dbi debug info
2027 * @param expr the IL assume expression
2029 * we support here only some simple cases:
2034 static ir_node *handle_assume_compare(dbg_info *dbi,
2035 const binary_expression_t *expression)
2037 expression_t *op1 = expression->left;
2038 expression_t *op2 = expression->right;
2039 declaration_t *var2, *var = NULL;
2040 ir_node *res = NULL;
2043 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2045 if (is_local_variable(op1) && is_local_variable(op2)) {
2046 var = op1->reference.declaration;
2047 var2 = op2->reference.declaration;
2049 type_t *const type = skip_typeref(var->type);
2050 ir_mode *const mode = get_ir_mode(type);
2052 ir_node *const irn1 = get_value(var->v.value_number, mode);
2053 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2055 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2056 set_value(var2->v.value_number, res);
2058 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2059 set_value(var->v.value_number, res);
2065 if (is_local_variable(op1) && is_constant_expression(op2)) {
2066 var = op1->reference.declaration;
2068 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2069 cmp_val = get_inversed_pnc(cmp_val);
2070 var = op2->reference.declaration;
2075 type_t *const type = skip_typeref(var->type);
2076 ir_mode *const mode = get_ir_mode(type);
2078 res = get_value(var->v.value_number, mode);
2079 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2080 set_value(var->v.value_number, res);
2086 * Handle the assume optimizer hint.
2088 * @param dbi debug info
2089 * @param expr the IL assume expression
2091 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2092 switch(expression->kind) {
2093 case EXPR_BINARY_EQUAL:
2094 case EXPR_BINARY_NOTEQUAL:
2095 case EXPR_BINARY_LESS:
2096 case EXPR_BINARY_LESSEQUAL:
2097 case EXPR_BINARY_GREATER:
2098 case EXPR_BINARY_GREATEREQUAL:
2099 return handle_assume_compare(dbi, &expression->binary);
2105 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2107 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2108 type_t *type = skip_typeref(expression->base.type);
2110 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2111 return expression_to_addr(expression->value);
2113 const expression_t *value = expression->value;
2115 switch(expression->base.kind) {
2116 case EXPR_UNARY_NEGATE: {
2117 ir_node *value_node = expression_to_firm(value);
2118 ir_mode *mode = get_ir_mode(type);
2119 return new_d_Minus(dbgi, value_node, mode);
2121 case EXPR_UNARY_PLUS:
2122 return expression_to_firm(value);
2123 case EXPR_UNARY_BITWISE_NEGATE: {
2124 ir_node *value_node = expression_to_firm(value);
2125 ir_mode *mode = get_ir_mode(type);
2126 return new_d_Not(dbgi, value_node, mode);
2128 case EXPR_UNARY_NOT: {
2129 ir_node *value_node = _expression_to_firm(value);
2130 value_node = create_conv(dbgi, value_node, mode_b);
2131 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2134 case EXPR_UNARY_DEREFERENCE: {
2135 ir_node *value_node = expression_to_firm(value);
2136 type_t *value_type = skip_typeref(value->base.type);
2137 assert(is_type_pointer(value_type));
2138 type_t *points_to = value_type->pointer.points_to;
2139 return deref_address(dbgi, points_to, value_node);
2141 case EXPR_UNARY_POSTFIX_INCREMENT:
2142 case EXPR_UNARY_POSTFIX_DECREMENT:
2143 case EXPR_UNARY_PREFIX_INCREMENT:
2144 case EXPR_UNARY_PREFIX_DECREMENT:
2145 return create_incdec(expression);
2146 case EXPR_UNARY_CAST: {
2147 ir_node *value_node = expression_to_firm(value);
2148 if (is_type_scalar(type)) {
2149 ir_mode *mode = get_ir_mode(type);
2150 ir_node *node = create_conv(dbgi, value_node, mode);
2151 node = do_strict_conv(dbgi, node);
2154 /* make sure firm type is constructed */
2155 (void) get_ir_type(type);
2159 case EXPR_UNARY_CAST_IMPLICIT: {
2160 ir_node *value_node = expression_to_firm(value);
2161 if (is_type_scalar(type)) {
2162 ir_mode *mode = get_ir_mode(type);
2163 return create_conv(dbgi, value_node, mode);
2168 case EXPR_UNARY_ASSUME:
2169 if (firm_opt.confirm)
2170 return handle_assume(dbgi, value);
2177 panic("invalid UNEXPR type found");
2181 * produces a 0/1 depending of the value of a mode_b node
2183 static ir_node *produce_condition_result(const expression_t *expression,
2186 ir_mode *mode = get_ir_mode(expression->base.type);
2187 ir_node *cur_block = get_cur_block();
2189 ir_node *one_block = new_immBlock();
2190 ir_node *one = new_Const(mode, get_mode_one(mode));
2191 ir_node *jmp_one = new_d_Jmp(dbgi);
2193 ir_node *zero_block = new_immBlock();
2194 ir_node *zero = new_Const(mode, get_mode_null(mode));
2195 ir_node *jmp_zero = new_d_Jmp(dbgi);
2197 set_cur_block(cur_block);
2198 create_condition_evaluation(expression, one_block, zero_block);
2199 mature_immBlock(one_block);
2200 mature_immBlock(zero_block);
2202 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2203 new_Block(2, in_cf);
2205 ir_node *in[2] = { one, zero };
2206 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2211 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2212 ir_node *value, type_t *type)
2214 pointer_type_t *const pointer_type = &type->pointer;
2215 type_t *const points_to = skip_typeref(pointer_type->points_to);
2216 unsigned elem_size = get_type_size_const(points_to);
2218 /* gcc extension: allow arithmetic with void * and function * */
2219 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2220 is_type_function(points_to)) {
2224 assert(elem_size >= 1);
2228 value = create_conv(dbgi, value, mode_int);
2229 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2230 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode_int);
2234 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2235 ir_node *left, ir_node *right)
2238 type_t *type_left = skip_typeref(expression->left->base.type);
2239 type_t *type_right = skip_typeref(expression->right->base.type);
2241 expression_kind_t kind = expression->base.kind;
2244 case EXPR_BINARY_SHIFTLEFT:
2245 case EXPR_BINARY_SHIFTRIGHT:
2246 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2247 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2248 mode = get_irn_mode(left);
2249 right = create_conv(dbgi, right, mode_uint);
2252 case EXPR_BINARY_SUB:
2253 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2254 const pointer_type_t *const ptr_type = &type_left->pointer;
2256 mode = get_ir_mode(expression->base.type);
2257 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2258 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2259 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2260 ir_node *const no_mem = new_NoMem();
2261 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2262 mode, op_pin_state_floats);
2263 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2266 case EXPR_BINARY_SUB_ASSIGN:
2267 if (is_type_pointer(type_left)) {
2268 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2269 mode = get_ir_mode(type_left);
2274 case EXPR_BINARY_ADD:
2275 case EXPR_BINARY_ADD_ASSIGN:
2276 if (is_type_pointer(type_left)) {
2277 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2278 mode = get_ir_mode(type_left);
2280 } else if (is_type_pointer(type_right)) {
2281 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2282 mode = get_ir_mode(type_right);
2289 mode = get_irn_mode(right);
2290 left = create_conv(dbgi, left, mode);
2295 case EXPR_BINARY_ADD_ASSIGN:
2296 case EXPR_BINARY_ADD:
2297 return new_d_Add(dbgi, left, right, mode);
2298 case EXPR_BINARY_SUB_ASSIGN:
2299 case EXPR_BINARY_SUB:
2300 return new_d_Sub(dbgi, left, right, mode);
2301 case EXPR_BINARY_MUL_ASSIGN:
2302 case EXPR_BINARY_MUL:
2303 return new_d_Mul(dbgi, left, right, mode);
2304 case EXPR_BINARY_BITWISE_AND:
2305 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2306 return new_d_And(dbgi, left, right, mode);
2307 case EXPR_BINARY_BITWISE_OR:
2308 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2309 return new_d_Or(dbgi, left, right, mode);
2310 case EXPR_BINARY_BITWISE_XOR:
2311 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2312 return new_d_Eor(dbgi, left, right, mode);
2313 case EXPR_BINARY_SHIFTLEFT:
2314 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2315 return new_d_Shl(dbgi, left, right, mode);
2316 case EXPR_BINARY_SHIFTRIGHT:
2317 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2318 if (mode_is_signed(mode)) {
2319 return new_d_Shrs(dbgi, left, right, mode);
2321 return new_d_Shr(dbgi, left, right, mode);
2323 case EXPR_BINARY_DIV:
2324 case EXPR_BINARY_DIV_ASSIGN: {
2325 ir_node *pin = new_Pin(new_NoMem());
2328 if (mode_is_float(mode)) {
2329 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2330 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2332 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2333 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2337 case EXPR_BINARY_MOD:
2338 case EXPR_BINARY_MOD_ASSIGN: {
2339 ir_node *pin = new_Pin(new_NoMem());
2340 assert(!mode_is_float(mode));
2341 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2342 op_pin_state_floats);
2343 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2347 panic("unexpected expression kind");
2351 static ir_node *create_lazy_op(const binary_expression_t *expression)
2353 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2354 type_t *type = expression->base.type;
2355 ir_mode *mode = get_ir_mode(type);
2357 if (is_constant_expression(expression->left)) {
2358 long val = fold_constant(expression->left);
2359 expression_kind_t ekind = expression->base.kind;
2360 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2361 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2362 (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2363 return expression_to_firm(expression->right);
2365 return new_Const(mode, get_mode_one(mode));
2369 return produce_condition_result((const expression_t*) expression, dbgi);
2372 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2373 ir_node *right, ir_mode *mode);
2375 static ir_node *create_assign_binop(const binary_expression_t *expression)
2377 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2378 const expression_t *left_expr = expression->left;
2379 ir_mode *left_mode = get_ir_mode(left_expr->base.type);
2380 ir_node *right = expression_to_firm(expression->right);
2381 ir_node *left_addr = expression_to_addr(left_expr);
2382 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2383 ir_node *result = create_op(dbgi, expression, left, right);
2385 result = create_conv(dbgi, result, left_mode);
2386 result = do_strict_conv(dbgi, result);
2388 set_value_for_expression_addr(left_expr, result, left_addr);
2393 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2395 expression_kind_t kind = expression->base.kind;
2398 case EXPR_BINARY_EQUAL:
2399 case EXPR_BINARY_NOTEQUAL:
2400 case EXPR_BINARY_LESS:
2401 case EXPR_BINARY_LESSEQUAL:
2402 case EXPR_BINARY_GREATER:
2403 case EXPR_BINARY_GREATEREQUAL:
2404 case EXPR_BINARY_ISGREATER:
2405 case EXPR_BINARY_ISGREATEREQUAL:
2406 case EXPR_BINARY_ISLESS:
2407 case EXPR_BINARY_ISLESSEQUAL:
2408 case EXPR_BINARY_ISLESSGREATER:
2409 case EXPR_BINARY_ISUNORDERED: {
2410 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2411 ir_node *left = expression_to_firm(expression->left);
2412 ir_node *right = expression_to_firm(expression->right);
2413 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2414 long pnc = get_pnc(kind, expression->left->base.type);
2415 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2418 case EXPR_BINARY_ASSIGN: {
2419 ir_node *addr = expression_to_addr(expression->left);
2420 ir_node *right = expression_to_firm(expression->right);
2421 set_value_for_expression_addr(expression->left, right, addr);
2425 case EXPR_BINARY_ADD:
2426 case EXPR_BINARY_SUB:
2427 case EXPR_BINARY_MUL:
2428 case EXPR_BINARY_DIV:
2429 case EXPR_BINARY_MOD:
2430 case EXPR_BINARY_BITWISE_AND:
2431 case EXPR_BINARY_BITWISE_OR:
2432 case EXPR_BINARY_BITWISE_XOR:
2433 case EXPR_BINARY_SHIFTLEFT:
2434 case EXPR_BINARY_SHIFTRIGHT:
2436 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2437 ir_node *left = expression_to_firm(expression->left);
2438 ir_node *right = expression_to_firm(expression->right);
2439 return create_op(dbgi, expression, left, right);
2441 case EXPR_BINARY_LOGICAL_AND:
2442 case EXPR_BINARY_LOGICAL_OR:
2443 return create_lazy_op(expression);
2444 case EXPR_BINARY_COMMA:
2445 /* create side effects of left side */
2446 (void) expression_to_firm(expression->left);
2447 return _expression_to_firm(expression->right);
2449 case EXPR_BINARY_ADD_ASSIGN:
2450 case EXPR_BINARY_SUB_ASSIGN:
2451 case EXPR_BINARY_MUL_ASSIGN:
2452 case EXPR_BINARY_MOD_ASSIGN:
2453 case EXPR_BINARY_DIV_ASSIGN:
2454 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2455 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2456 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2457 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2458 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2459 return create_assign_binop(expression);
2460 case EXPR_BINARY_BUILTIN_EXPECT:
2461 return _expression_to_firm(expression->left);
2463 panic("TODO binexpr type");
2467 static ir_node *array_access_addr(const array_access_expression_t *expression)
2469 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2470 ir_node *base_addr = expression_to_firm(expression->array_ref);
2471 ir_node *offset = expression_to_firm(expression->index);
2473 type_t *offset_type = skip_typeref(expression->index->base.type);
2475 if (is_type_signed(offset_type)) {
2476 mode = get_ir_mode(type_ssize_t);
2478 mode = get_ir_mode(type_size_t);
2480 offset = create_conv(dbgi, offset, mode);
2482 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2483 assert(is_type_pointer(ref_type));
2484 pointer_type_t *pointer_type = &ref_type->pointer;
2486 ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2487 elem_size_const = create_conv(dbgi, elem_size_const, mode);
2488 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
2490 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2495 static ir_node *array_access_to_firm(
2496 const array_access_expression_t *expression)
2498 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2499 ir_node *addr = array_access_addr(expression);
2500 type_t *type = revert_automatic_type_conversion(
2501 (const expression_t*) expression);
2502 type = skip_typeref(type);
2504 return deref_address(dbgi, type, addr);
2507 static long get_offsetof_offset(const offsetof_expression_t *expression)
2509 type_t *orig_type = expression->type;
2512 designator_t *designator = expression->designator;
2513 for( ; designator != NULL; designator = designator->next) {
2514 type_t *type = skip_typeref(orig_type);
2515 /* be sure the type is constructed */
2516 (void) get_ir_type(type);
2518 if (designator->symbol != NULL) {
2519 assert(is_type_compound(type));
2520 symbol_t *symbol = designator->symbol;
2522 declaration_t *declaration = type->compound.declaration;
2523 declaration_t *iter = declaration->scope.declarations;
2524 for( ; iter != NULL; iter = iter->next) {
2525 if (iter->symbol == symbol) {
2529 assert(iter != NULL);
2531 assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2532 offset += get_entity_offset(iter->v.entity);
2534 orig_type = iter->type;
2536 expression_t *array_index = designator->array_index;
2537 assert(designator->array_index != NULL);
2538 assert(is_type_array(type));
2539 assert(is_type_valid(array_index->base.type));
2541 long index = fold_constant(array_index);
2542 ir_type *arr_type = get_ir_type(type);
2543 ir_type *elem_type = get_array_element_type(arr_type);
2544 long elem_size = get_type_size_bytes(elem_type);
2546 offset += index * elem_size;
2548 orig_type = type->array.element_type;
2555 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2557 ir_mode *mode = get_ir_mode(expression->base.type);
2558 long offset = get_offsetof_offset(expression);
2559 tarval *tv = new_tarval_from_long(offset, mode);
2560 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2562 return new_d_Const(dbgi, mode, tv);
2565 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2566 ir_entity *entity, type_t *type);
2568 static ir_node *compound_literal_to_firm(
2569 const compound_literal_expression_t *expression)
2571 type_t *type = expression->type;
2573 /* create an entity on the stack */
2574 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2576 ident *const id = id_unique("CompLit.%u");
2577 ir_type *const irtype = get_ir_type(type);
2578 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2579 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2580 set_entity_ld_ident(entity, id);
2582 set_entity_variability(entity, variability_uninitialized);
2584 /* create initialisation code */
2585 initializer_t *initializer = expression->initializer;
2586 create_local_initializer(initializer, dbgi, entity, type);
2588 /* create a sel for the compound literal address */
2589 ir_node *frame = get_local_frame(entity);
2590 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2595 * Transform a sizeof expression into Firm code.
2597 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2599 type_t *type = expression->type;
2601 type = expression->tp_expression->base.type;
2602 assert(type != NULL);
2605 type = skip_typeref(type);
2606 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2607 if (is_type_array(type) && type->array.is_vla
2608 && expression->tp_expression != NULL) {
2609 expression_to_firm(expression->tp_expression);
2612 return get_type_size(type);
2616 * Transform an alignof expression into Firm code.
2618 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2620 type_t *type = expression->type;
2622 /* beware: if expression is a variable reference, return the
2623 alignment of the variable. */
2624 const expression_t *tp_expression = expression->tp_expression;
2625 const declaration_t *declaration = expr_is_variable(tp_expression);
2626 if (declaration != NULL) {
2627 /* TODO: get the alignment of this variable. */
2629 type = tp_expression->base.type;
2630 assert(type != NULL);
2633 ir_mode *const mode = get_ir_mode(expression->base.type);
2634 symconst_symbol sym;
2635 sym.type_p = get_ir_type(type);
2636 return new_SymConst(mode, sym, symconst_type_align);
2639 static void init_ir_types(void);
2641 long fold_constant(const expression_t *expression)
2643 bool constant_folding_old = constant_folding;
2644 constant_folding = true;
2648 assert(is_constant_expression(expression));
2650 ir_graph *old_current_ir_graph = current_ir_graph;
2651 if (current_ir_graph == NULL) {
2652 current_ir_graph = get_const_code_irg();
2655 ir_node *cnst = expression_to_firm(expression);
2656 current_ir_graph = old_current_ir_graph;
2658 if (!is_Const(cnst)) {
2659 panic("couldn't fold constant\n");
2662 tarval *tv = get_Const_tarval(cnst);
2663 if (!tarval_is_long(tv)) {
2664 panic("result of constant folding is not integer\n");
2667 constant_folding = constant_folding_old;
2669 return get_tarval_long(tv);
2672 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2674 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2676 /* first try to fold a constant condition */
2677 if (is_constant_expression(expression->condition)) {
2678 long val = fold_constant(expression->condition);
2680 expression_t *true_expression = expression->true_expression;
2681 if (true_expression == NULL)
2682 true_expression = expression->condition;
2683 return expression_to_firm(true_expression);
2685 return expression_to_firm(expression->false_expression);
2689 ir_node *cur_block = get_cur_block();
2691 /* create the true block */
2692 ir_node *true_block = new_immBlock();
2694 ir_node *true_val = expression->true_expression != NULL ?
2695 expression_to_firm(expression->true_expression) : NULL;
2696 ir_node *true_jmp = new_Jmp();
2698 /* create the false block */
2699 ir_node *false_block = new_immBlock();
2701 ir_node *false_val = expression_to_firm(expression->false_expression);
2702 ir_node *false_jmp = new_Jmp();
2704 /* create the condition evaluation */
2705 set_cur_block(cur_block);
2706 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2707 if (expression->true_expression == NULL) {
2708 if (cond_expr != NULL) {
2709 true_val = cond_expr;
2711 /* Condition ended with a short circuit (&&, ||, !) operation.
2712 * Generate a "1" as value for the true branch. */
2713 ir_mode *const mode = mode_Is;
2714 true_val = new_Const(mode, get_mode_one(mode));
2717 mature_immBlock(true_block);
2718 mature_immBlock(false_block);
2720 /* create the common block */
2721 ir_node *in_cf[2] = { true_jmp, false_jmp };
2722 new_Block(2, in_cf);
2724 /* TODO improve static semantics, so either both or no values are NULL */
2725 if (true_val == NULL || false_val == NULL)
2728 ir_node *in[2] = { true_val, false_val };
2729 ir_mode *mode = get_irn_mode(true_val);
2730 assert(get_irn_mode(false_val) == mode);
2731 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2737 * Returns an IR-node representing the address of a field.
2739 static ir_node *select_addr(const select_expression_t *expression)
2741 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2743 ir_node *compound_addr = expression_to_firm(expression->compound);
2745 /* make sure the type is constructed */
2746 type_t *type = skip_typeref(expression->compound->base.type);
2747 if (is_type_pointer(type)) {
2748 type = type->pointer.points_to;
2750 (void) get_ir_type(type);
2752 declaration_t *entry = expression->compound_entry;
2753 assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2754 ir_entity *entity = entry->v.entity;
2756 assert(entity != NULL);
2758 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2763 static ir_node *select_to_firm(const select_expression_t *expression)
2765 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2766 ir_node *addr = select_addr(expression);
2767 type_t *type = revert_automatic_type_conversion(
2768 (const expression_t*) expression);
2769 type = skip_typeref(type);
2771 declaration_t *entry = expression->compound_entry;
2772 type_t *entry_type = skip_typeref(entry->type);
2774 if (entry_type->kind == TYPE_BITFIELD) {
2775 return bitfield_extract_to_firm(expression, addr);
2778 return deref_address(dbgi, type, addr);
2781 /* Values returned by __builtin_classify_type. */
2782 typedef enum gcc_type_class
2788 enumeral_type_class,
2791 reference_type_class,
2795 function_type_class,
2806 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2808 const type_t *const type = skip_typeref(expr->type_expression->base.type);
2814 const atomic_type_t *const atomic_type = &type->atomic;
2815 switch (atomic_type->akind) {
2816 /* should not be reached */
2817 case ATOMIC_TYPE_INVALID:
2821 /* gcc cannot do that */
2822 case ATOMIC_TYPE_VOID:
2823 tc = void_type_class;
2826 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2827 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2828 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2829 case ATOMIC_TYPE_SHORT:
2830 case ATOMIC_TYPE_USHORT:
2831 case ATOMIC_TYPE_INT:
2832 case ATOMIC_TYPE_UINT:
2833 case ATOMIC_TYPE_LONG:
2834 case ATOMIC_TYPE_ULONG:
2835 case ATOMIC_TYPE_LONGLONG:
2836 case ATOMIC_TYPE_ULONGLONG:
2837 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2838 tc = integer_type_class;
2841 case ATOMIC_TYPE_FLOAT:
2842 case ATOMIC_TYPE_DOUBLE:
2843 case ATOMIC_TYPE_LONG_DOUBLE:
2844 tc = real_type_class;
2847 panic("Unexpected atomic type in classify_type_to_firm().");
2850 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2851 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2852 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2853 case TYPE_ARRAY: /* gcc handles this as pointer */
2854 case TYPE_FUNCTION: /* gcc handles this as pointer */
2855 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2856 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2857 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2859 /* gcc handles this as integer */
2860 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2863 /* typedef/typeof should be skipped already */
2870 panic("unexpected TYPE classify_type_to_firm().");
2873 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2874 ir_mode *const mode = mode_int;
2875 tarval *const tv = new_tarval_from_long(tc, mode);
2876 return new_d_Const(dbgi, mode, tv);
2879 static ir_node *function_name_to_firm(
2880 const funcname_expression_t *const expr)
2882 switch(expr->kind) {
2883 case FUNCNAME_FUNCTION:
2884 case FUNCNAME_PRETTY_FUNCTION:
2885 case FUNCNAME_FUNCDNAME:
2886 if (current_function_name == NULL) {
2887 const source_position_t *const src_pos = &expr->base.source_position;
2888 const char *const name = current_function_decl->symbol->string;
2889 const string_t string = { name, strlen(name) + 1 };
2890 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2892 return current_function_name;
2893 case FUNCNAME_FUNCSIG:
2894 if (current_funcsig == NULL) {
2895 const source_position_t *const src_pos = &expr->base.source_position;
2896 ir_entity *ent = get_irg_entity(current_ir_graph);
2897 const char *const name = get_entity_ld_name(ent);
2898 const string_t string = { name, strlen(name) + 1 };
2899 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2901 return current_funcsig;
2903 panic("Unsupported function name");
2906 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2908 statement_t *statement = expr->statement;
2910 assert(statement->kind == STATEMENT_COMPOUND);
2911 return compound_statement_to_firm(&statement->compound);
2914 static ir_node *va_start_expression_to_firm(
2915 const va_start_expression_t *const expr)
2917 ir_type *const method_type = get_ir_type(current_function_decl->type);
2918 int const n = get_method_n_params(method_type) - 1;
2919 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2920 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2921 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2922 ir_node *const no_mem = new_NoMem();
2923 ir_node *const arg_sel =
2924 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2926 ir_node *const cnst = get_type_size(expr->parameter->type);
2927 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2928 set_value_for_expression(expr->ap, add);
2933 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2935 type_t *const type = expr->base.type;
2936 expression_t *const ap_expr = expr->ap;
2937 ir_node *const ap_addr = expression_to_addr(ap_expr);
2938 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
2939 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2940 ir_node *const res = deref_address(dbgi, type, ap);
2942 ir_node *const cnst = get_type_size(expr->base.type);
2943 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2945 set_value_for_expression_addr(ap_expr, add, ap_addr);
2950 static ir_node *dereference_addr(const unary_expression_t *const expression)
2952 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2953 return expression_to_firm(expression->value);
2957 * Returns a IR-node representing an lvalue of the given expression.
2959 static ir_node *expression_to_addr(const expression_t *expression)
2961 switch(expression->kind) {
2962 case EXPR_REFERENCE:
2963 return reference_addr(&expression->reference);
2964 case EXPR_ARRAY_ACCESS:
2965 return array_access_addr(&expression->array_access);
2967 return select_addr(&expression->select);
2969 return call_expression_to_firm(&expression->call);
2970 case EXPR_UNARY_DEREFERENCE: {
2971 return dereference_addr(&expression->unary);
2976 panic("trying to get address of non-lvalue");
2979 static ir_node *builtin_constant_to_firm(
2980 const builtin_constant_expression_t *expression)
2982 ir_mode *mode = get_ir_mode(expression->base.type);
2985 if (is_constant_expression(expression->value)) {
2990 return new_Const_long(mode, v);
2993 static ir_node *builtin_prefetch_to_firm(
2994 const builtin_prefetch_expression_t *expression)
2996 ir_node *adr = expression_to_firm(expression->adr);
2997 /* no Firm support for prefetch yet */
3002 static ir_node *get_label_block(declaration_t *label)
3004 assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
3006 if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3007 return label->v.block;
3009 assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3011 /* beware: might be called from create initializer with current_ir_graph
3012 * set to const_code_irg. */
3013 ir_graph *rem = current_ir_graph;
3014 current_ir_graph = current_function;
3016 ir_node *old_cur_block = get_cur_block();
3017 ir_node *block = new_immBlock();
3018 set_cur_block(old_cur_block);
3020 label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3021 label->v.block = block;
3023 ARR_APP1(declaration_t *, all_labels, label);
3025 current_ir_graph = rem;
3030 * Pointer to a label. This is used for the
3031 * GNU address-of-label extension.
3033 static ir_node *label_address_to_firm(
3034 const label_address_expression_t *label)
3036 ir_node *block = get_label_block(label->declaration);
3037 ir_label_t nr = get_Block_label(block);
3040 nr = get_irp_next_label_nr();
3041 set_Block_label(block, nr);
3043 symconst_symbol value;
3045 return new_SymConst(mode_P_code, value, symconst_label);
3049 * creates firm nodes for an expression. The difference between this function
3050 * and expression_to_firm is, that this version might produce mode_b nodes
3051 * instead of mode_Is.
3053 static ir_node *_expression_to_firm(const expression_t *expression)
3056 if (!constant_folding) {
3057 assert(!expression->base.transformed);
3058 ((expression_t*) expression)->base.transformed = true;
3062 switch (expression->kind) {
3063 case EXPR_CHARACTER_CONSTANT:
3064 return character_constant_to_firm(&expression->conste);
3065 case EXPR_WIDE_CHARACTER_CONSTANT:
3066 return wide_character_constant_to_firm(&expression->conste);
3068 return const_to_firm(&expression->conste);
3069 case EXPR_STRING_LITERAL:
3070 return string_literal_to_firm(&expression->string);
3071 case EXPR_WIDE_STRING_LITERAL:
3072 return wide_string_literal_to_firm(&expression->wide_string);
3073 case EXPR_REFERENCE:
3074 return reference_expression_to_firm(&expression->reference);
3076 return call_expression_to_firm(&expression->call);
3078 return unary_expression_to_firm(&expression->unary);
3080 return binary_expression_to_firm(&expression->binary);
3081 case EXPR_ARRAY_ACCESS:
3082 return array_access_to_firm(&expression->array_access);
3084 return sizeof_to_firm(&expression->typeprop);
3086 return alignof_to_firm(&expression->typeprop);
3087 case EXPR_CONDITIONAL:
3088 return conditional_to_firm(&expression->conditional);
3090 return select_to_firm(&expression->select);
3091 case EXPR_CLASSIFY_TYPE:
3092 return classify_type_to_firm(&expression->classify_type);
3094 return function_name_to_firm(&expression->funcname);
3095 case EXPR_STATEMENT:
3096 return statement_expression_to_firm(&expression->statement);
3098 return va_start_expression_to_firm(&expression->va_starte);
3100 return va_arg_expression_to_firm(&expression->va_arge);
3101 case EXPR_BUILTIN_SYMBOL:
3102 panic("unimplemented expression found");
3103 case EXPR_BUILTIN_CONSTANT_P:
3104 return builtin_constant_to_firm(&expression->builtin_constant);
3105 case EXPR_BUILTIN_PREFETCH:
3106 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3108 return offsetof_to_firm(&expression->offsetofe);
3109 case EXPR_COMPOUND_LITERAL:
3110 return compound_literal_to_firm(&expression->compound_literal);
3111 case EXPR_LABEL_ADDRESS:
3112 return label_address_to_firm(&expression->label_address);
3118 panic("invalid expression found");
3121 static bool produces_mode_b(const expression_t *expression)
3123 switch (expression->kind) {
3124 case EXPR_BINARY_EQUAL:
3125 case EXPR_BINARY_NOTEQUAL:
3126 case EXPR_BINARY_LESS:
3127 case EXPR_BINARY_LESSEQUAL:
3128 case EXPR_BINARY_GREATER:
3129 case EXPR_BINARY_GREATEREQUAL:
3130 case EXPR_BINARY_ISGREATER:
3131 case EXPR_BINARY_ISGREATEREQUAL:
3132 case EXPR_BINARY_ISLESS:
3133 case EXPR_BINARY_ISLESSEQUAL:
3134 case EXPR_BINARY_ISLESSGREATER:
3135 case EXPR_BINARY_ISUNORDERED:
3136 case EXPR_UNARY_NOT:
3139 case EXPR_BINARY_BUILTIN_EXPECT:
3140 return produces_mode_b(expression->binary.left);
3141 case EXPR_BINARY_COMMA:
3142 return produces_mode_b(expression->binary.right);
3149 static ir_node *expression_to_firm(const expression_t *expression)
3151 if (!produces_mode_b(expression)) {
3152 ir_node *res = _expression_to_firm(expression);
3153 assert(res == NULL || get_irn_mode(res) != mode_b);
3157 if (is_constant_expression(expression)) {
3158 ir_node *res = _expression_to_firm(expression);
3159 ir_mode *mode = get_ir_mode(expression->base.type);
3160 assert(is_Const(res));
3161 if (is_Const_null(res)) {
3162 return new_Const_long(mode, 0);
3164 return new_Const_long(mode, 1);
3168 /* we have to produce a 0/1 from the mode_b expression */
3169 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3170 return produce_condition_result(expression, dbgi);
3174 * create a short-circuit expression evaluation that tries to construct
3175 * efficient control flow structures for &&, || and ! expressions
3177 static ir_node *create_condition_evaluation(const expression_t *expression,
3178 ir_node *true_block,
3179 ir_node *false_block)
3181 switch(expression->kind) {
3182 case EXPR_UNARY_NOT: {
3183 const unary_expression_t *unary_expression = &expression->unary;
3184 create_condition_evaluation(unary_expression->value, false_block,
3188 case EXPR_BINARY_LOGICAL_AND: {
3189 const binary_expression_t *binary_expression = &expression->binary;
3191 ir_node *cur_block = get_cur_block();
3192 ir_node *extra_block = new_immBlock();
3193 set_cur_block(cur_block);
3194 create_condition_evaluation(binary_expression->left, extra_block,
3196 mature_immBlock(extra_block);
3197 set_cur_block(extra_block);
3198 create_condition_evaluation(binary_expression->right, true_block,
3202 case EXPR_BINARY_LOGICAL_OR: {
3203 const binary_expression_t *binary_expression = &expression->binary;
3205 ir_node *cur_block = get_cur_block();
3206 ir_node *extra_block = new_immBlock();
3207 set_cur_block(cur_block);
3208 create_condition_evaluation(binary_expression->left, true_block,
3210 mature_immBlock(extra_block);
3211 set_cur_block(extra_block);
3212 create_condition_evaluation(binary_expression->right, true_block,
3220 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3221 ir_node *cond_expr = _expression_to_firm(expression);
3222 ir_node *condition = create_conv(NULL, cond_expr, mode_b);
3223 ir_node *cond = new_d_Cond(dbgi, condition);
3224 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3225 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3227 /* set branch prediction info based on __builtin_expect */
3228 if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3229 long cnst = fold_constant(expression->binary.right);
3230 cond_jmp_predicate pred;
3233 pred = COND_JMP_PRED_FALSE;
3235 pred = COND_JMP_PRED_TRUE;
3237 set_Cond_jmp_pred(cond, pred);
3240 add_immBlock_pred(true_block, true_proj);
3241 if (false_block != NULL) {
3242 add_immBlock_pred(false_block, false_proj);
3245 set_cur_block(NULL);
3251 static void create_declaration_entity(declaration_t *declaration,
3252 declaration_kind_t declaration_kind,
3253 ir_type *parent_type)
3255 type_t *const type = skip_typeref(declaration->type);
3256 if (is_type_function(type)) {
3257 (void) get_function_entity(declaration);
3261 ident *const id = new_id_from_str(declaration->symbol->string);
3262 ir_type *const irtype = get_ir_type(type);
3263 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
3264 ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3266 handle_gnu_attributes_ent(entity, declaration);
3268 declaration->declaration_kind = (unsigned char) declaration_kind;
3269 declaration->v.entity = entity;
3270 set_entity_variability(entity, variability_uninitialized);
3271 set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3272 if (parent_type == get_tls_type())
3273 set_entity_allocation(entity, allocation_automatic);
3274 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3275 set_entity_allocation(entity, allocation_static);
3277 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3278 set_entity_volatility(entity, volatility_is_volatile);
3283 typedef struct type_path_entry_t type_path_entry_t;
3284 struct type_path_entry_t {
3286 ir_initializer_t *initializer;
3288 declaration_t *compound_entry;
3291 typedef struct type_path_t type_path_t;
3292 struct type_path_t {
3293 type_path_entry_t *path;
3298 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3300 size_t len = ARR_LEN(path->path);
3302 for(size_t i = 0; i < len; ++i) {
3303 const type_path_entry_t *entry = & path->path[i];
3305 type_t *type = skip_typeref(entry->type);
3306 if (is_type_compound(type)) {
3307 fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3308 } else if (is_type_array(type)) {
3309 fprintf(stderr, "[%zd]", entry->index);
3311 fprintf(stderr, "-INVALID-");
3314 fprintf(stderr, " (");
3315 print_type(path->top_type);
3316 fprintf(stderr, ")");
3319 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3321 size_t len = ARR_LEN(path->path);
3323 return & path->path[len-1];
3326 static type_path_entry_t *append_to_type_path(type_path_t *path)
3328 size_t len = ARR_LEN(path->path);
3329 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3331 type_path_entry_t *result = & path->path[len];
3332 memset(result, 0, sizeof(result[0]));
3336 static size_t get_compound_size(const compound_type_t *type)
3338 declaration_t *declaration = type->declaration;
3339 declaration_t *member = declaration->scope.declarations;
3341 for( ; member != NULL; member = member->next) {
3344 /* TODO: cache results? */
3349 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3351 type_t *orig_top_type = path->top_type;
3352 type_t *top_type = skip_typeref(orig_top_type);
3354 assert(is_type_compound(top_type) || is_type_array(top_type));
3356 if (ARR_LEN(path->path) == 0) {
3359 type_path_entry_t *top = get_type_path_top(path);
3360 ir_initializer_t *initializer = top->initializer;
3361 return get_initializer_compound_value(initializer, top->index);
3365 static void descend_into_subtype(type_path_t *path)
3367 type_t *orig_top_type = path->top_type;
3368 type_t *top_type = skip_typeref(orig_top_type);
3370 assert(is_type_compound(top_type) || is_type_array(top_type));
3372 ir_initializer_t *initializer = get_initializer_entry(path);
3374 type_path_entry_t *top = append_to_type_path(path);
3375 top->type = top_type;
3379 if (is_type_compound(top_type)) {
3380 declaration_t *declaration = top_type->compound.declaration;
3381 declaration_t *entry = declaration->scope.declarations;
3383 top->compound_entry = entry;
3385 len = get_compound_size(&top_type->compound);
3387 path->top_type = entry->type;
3389 assert(is_type_array(top_type));
3390 assert(top_type->array.size > 0);
3393 path->top_type = top_type->array.element_type;
3394 len = top_type->array.size;
3396 if (initializer == NULL
3397 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3398 initializer = create_initializer_compound(len);
3399 /* we have to set the entry at the 2nd latest path entry... */
3400 size_t path_len = ARR_LEN(path->path);
3401 assert(path_len >= 1);
3403 type_path_entry_t *entry = & path->path[path_len-2];
3404 ir_initializer_t *tinitializer = entry->initializer;
3405 set_initializer_compound_value(tinitializer, entry->index,
3409 top->initializer = initializer;
3412 static void ascend_from_subtype(type_path_t *path)
3414 type_path_entry_t *top = get_type_path_top(path);
3416 path->top_type = top->type;
3418 size_t len = ARR_LEN(path->path);
3419 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3422 static void walk_designator(type_path_t *path, const designator_t *designator)
3424 /* designators start at current object type */
3425 ARR_RESIZE(type_path_entry_t, path->path, 1);
3427 for( ; designator != NULL; designator = designator->next) {
3428 type_path_entry_t *top = get_type_path_top(path);
3429 type_t *orig_type = top->type;
3430 type_t *type = skip_typeref(orig_type);
3432 if (designator->symbol != NULL) {
3433 assert(is_type_compound(type));
3435 symbol_t *symbol = designator->symbol;
3437 declaration_t *declaration = type->compound.declaration;
3438 declaration_t *iter = declaration->scope.declarations;
3439 for( ; iter != NULL; iter = iter->next, ++index) {
3440 if (iter->symbol == symbol) {
3444 assert(iter != NULL);
3446 top->type = orig_type;
3447 top->compound_entry = iter;
3449 orig_type = iter->type;
3451 expression_t *array_index = designator->array_index;
3452 assert(designator->array_index != NULL);
3453 assert(is_type_array(type));
3454 assert(is_type_valid(array_index->base.type));
3456 long index = fold_constant(array_index);
3459 if (type->array.size_constant) {
3460 long array_size = type->array.size;
3461 assert(index < array_size);
3465 top->type = orig_type;
3466 top->index = (size_t) index;
3467 orig_type = type->array.element_type;
3469 path->top_type = orig_type;
3471 if (designator->next != NULL) {
3472 descend_into_subtype(path);
3476 path->invalid = false;
3479 static void advance_current_object(type_path_t *path)
3481 if (path->invalid) {
3482 /* TODO: handle this... */
3483 panic("invalid initializer in ast2firm (excessive elements)");
3487 type_path_entry_t *top = get_type_path_top(path);
3489 type_t *type = skip_typeref(top->type);
3490 if (is_type_union(type)) {
3491 top->compound_entry = NULL;
3492 } else if (is_type_struct(type)) {
3493 declaration_t *entry = top->compound_entry;
3496 entry = entry->next;
3497 top->compound_entry = entry;
3498 if (entry != NULL) {
3499 path->top_type = entry->type;
3503 assert(is_type_array(type));
3506 if (!type->array.size_constant || top->index < type->array.size) {
3511 /* we're past the last member of the current sub-aggregate, try if we
3512 * can ascend in the type hierarchy and continue with another subobject */
3513 size_t len = ARR_LEN(path->path);
3516 ascend_from_subtype(path);
3517 advance_current_object(path);
3519 path->invalid = true;
3524 static ir_initializer_t *create_ir_initializer(
3525 const initializer_t *initializer, type_t *type);
3527 static ir_initializer_t *create_ir_initializer_value(
3528 const initializer_value_t *initializer)
3530 if (is_type_compound(initializer->value->base.type)) {
3531 panic("initializer creation for compounds not implemented yet");
3533 ir_node *value = expression_to_firm(initializer->value);
3534 return create_initializer_const(value);
3537 static ir_initializer_t *create_ir_initializer_list(
3538 const initializer_list_t *initializer, type_t *type)
3541 memset(&path, 0, sizeof(path));
3542 path.top_type = type;
3543 path.path = NEW_ARR_F(type_path_entry_t, 0);
3545 descend_into_subtype(&path);
3547 for(size_t i = 0; i < initializer->len; ++i) {
3548 const initializer_t *sub_initializer = initializer->initializers[i];
3550 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3551 walk_designator(&path, sub_initializer->designator.designator);
3555 if (sub_initializer->kind == INITIALIZER_VALUE) {
3556 /* we might have to descend into types until we're at a scalar
3559 type_t *orig_top_type = path.top_type;
3560 type_t *top_type = skip_typeref(orig_top_type);
3562 if (is_type_scalar(top_type))
3564 descend_into_subtype(&path);
3568 ir_initializer_t *sub_irinitializer
3569 = create_ir_initializer(sub_initializer, path.top_type);
3571 size_t path_len = ARR_LEN(path.path);
3572 assert(path_len >= 1);
3573 type_path_entry_t *entry = & path.path[path_len-1];
3574 ir_initializer_t *tinitializer = entry->initializer;
3575 set_initializer_compound_value(tinitializer, entry->index,
3578 advance_current_object(&path);
3581 assert(ARR_LEN(path.path) >= 1);
3582 ir_initializer_t *result = path.path[0].initializer;
3583 DEL_ARR_F(path.path);
3588 static ir_initializer_t *create_ir_initializer_string(
3589 const initializer_string_t *initializer, type_t *type)
3591 type = skip_typeref(type);
3593 size_t string_len = initializer->string.size;
3594 assert(type->kind == TYPE_ARRAY);
3595 assert(type->array.size_constant);
3596 size_t len = type->array.size;
3597 ir_initializer_t *irinitializer = create_initializer_compound(len);
3599 const char *string = initializer->string.begin;
3600 ir_mode *mode = get_ir_mode(type->array.element_type);
3602 for(size_t i = 0; i < len; ++i) {
3607 tarval *tv = new_tarval_from_long(c, mode);
3608 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3610 set_initializer_compound_value(irinitializer, i, char_initializer);
3613 return irinitializer;
3616 static ir_initializer_t *create_ir_initializer_wide_string(
3617 const initializer_wide_string_t *initializer, type_t *type)
3619 size_t string_len = initializer->string.size;
3620 assert(type->kind == TYPE_ARRAY);
3621 assert(type->array.size_constant);
3622 size_t len = type->array.size;
3623 ir_initializer_t *irinitializer = create_initializer_compound(len);
3625 const wchar_rep_t *string = initializer->string.begin;
3626 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3628 for(size_t i = 0; i < len; ++i) {
3630 if (i < string_len) {
3633 tarval *tv = new_tarval_from_long(c, mode);
3634 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3636 set_initializer_compound_value(irinitializer, i, char_initializer);
3639 return irinitializer;
3642 static ir_initializer_t *create_ir_initializer(
3643 const initializer_t *initializer, type_t *type)
3645 switch(initializer->kind) {
3646 case INITIALIZER_STRING:
3647 return create_ir_initializer_string(&initializer->string, type);
3649 case INITIALIZER_WIDE_STRING:
3650 return create_ir_initializer_wide_string(&initializer->wide_string,
3653 case INITIALIZER_LIST:
3654 return create_ir_initializer_list(&initializer->list, type);
3656 case INITIALIZER_VALUE:
3657 return create_ir_initializer_value(&initializer->value);
3659 case INITIALIZER_DESIGNATOR:
3660 panic("unexpected designator initializer found");
3662 panic("unknown initializer");
3665 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3668 if (is_atomic_type(type)) {
3669 ir_mode *mode = get_type_mode(type);
3670 tarval *zero = get_mode_null(mode);
3671 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3673 /* TODO: bitfields */
3674 ir_node *mem = get_store();
3675 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3676 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3679 assert(is_compound_type(type));
3682 if (is_Array_type(type)) {
3683 assert(has_array_upper_bound(type, 0));
3684 n_members = get_array_upper_bound_int(type, 0);
3686 n_members = get_compound_n_members(type);
3689 for(int i = 0; i < n_members; ++i) {
3692 if (is_Array_type(type)) {
3693 ir_entity *entity = get_array_element_entity(type);
3694 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3695 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3696 ir_node *in[1] = { cnst };
3697 irtype = get_array_element_type(type);
3698 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3700 ir_entity *member = get_compound_member(type, i);
3702 irtype = get_entity_type(member);
3703 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3706 create_dynamic_null_initializer(irtype, dbgi, addr);
3711 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3712 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3714 switch(get_initializer_kind(initializer)) {
3715 case IR_INITIALIZER_NULL: {
3716 create_dynamic_null_initializer(type, dbgi, base_addr);
3719 case IR_INITIALIZER_CONST: {
3720 ir_node *node = get_initializer_const_value(initializer);
3721 ir_mode *mode = get_irn_mode(node);
3722 assert(get_type_mode(type) == mode);
3724 /* TODO: bitfields... */
3725 ir_node *mem = get_store();
3726 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3727 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3731 case IR_INITIALIZER_TARVAL: {
3732 tarval *tv = get_initializer_tarval_value(initializer);
3733 ir_mode *mode = get_tarval_mode(tv);
3734 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3735 assert(get_type_mode(type) == mode);
3737 /* TODO: bitfields... */
3738 ir_node *mem = get_store();
3739 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3740 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3744 case IR_INITIALIZER_COMPOUND: {
3745 assert(is_compound_type(type));
3747 if (is_Array_type(type)) {
3748 assert(has_array_upper_bound(type, 0));
3749 n_members = get_array_upper_bound_int(type, 0);
3751 n_members = get_compound_n_members(type);
3754 if (get_initializer_compound_n_entries(initializer)
3755 != (unsigned) n_members)
3756 panic("initializer doesn't match compound type");
3758 for(int i = 0; i < n_members; ++i) {
3761 if (is_Array_type(type)) {
3762 ir_entity *entity = get_array_element_entity(type);
3763 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3764 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3765 ir_node *in[1] = { cnst };
3766 irtype = get_array_element_type(type);
3767 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3769 ir_entity *member = get_compound_member(type, i);
3771 irtype = get_entity_type(member);
3772 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3775 ir_initializer_t *sub_init
3776 = get_initializer_compound_value(initializer, i);
3778 create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3784 panic("invalid IR_INITIALIZER found");
3787 static void create_dynamic_initializer(ir_initializer_t *initializer,
3788 dbg_info *dbgi, ir_entity *entity)
3790 ir_node *frame = get_local_frame(entity);
3791 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3792 ir_type *type = get_entity_type(entity);
3794 create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3797 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3798 ir_entity *entity, type_t *type)
3800 ir_node *memory = get_store();
3801 ir_node *nomem = new_NoMem();
3802 ir_node *frame = get_irg_frame(current_ir_graph);
3803 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3805 if (initializer->kind == INITIALIZER_VALUE) {
3806 initializer_value_t *initializer_value = &initializer->value;
3808 ir_node *value = expression_to_firm(initializer_value->value);
3809 type = skip_typeref(type);
3810 assign_value(dbgi, addr, type, value);
3814 if (!is_constant_initializer(initializer)) {
3815 ir_initializer_t *irinitializer
3816 = create_ir_initializer(initializer, type);
3818 create_dynamic_initializer(irinitializer, dbgi, entity);
3822 /* create the ir_initializer */
3823 ir_graph *const old_current_ir_graph = current_ir_graph;
3824 current_ir_graph = get_const_code_irg();
3826 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3828 assert(current_ir_graph == get_const_code_irg());
3829 current_ir_graph = old_current_ir_graph;
3831 /* create a "template" entity which is copied to the entity on the stack */
3832 ident *const id = id_unique("initializer.%u");
3833 ir_type *const irtype = get_ir_type(type);
3834 ir_type *const global_type = get_glob_type();
3835 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3836 set_entity_ld_ident(init_entity, id);
3838 set_entity_variability(init_entity, variability_initialized);
3839 set_entity_visibility(init_entity, visibility_local);
3840 set_entity_allocation(init_entity, allocation_static);
3842 set_entity_initializer(init_entity, irinitializer);
3844 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3845 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3847 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3848 set_store(copyb_mem);
3851 static void create_initializer_local_variable_entity(declaration_t *declaration)
3853 initializer_t *initializer = declaration->init.initializer;
3854 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3855 ir_entity *entity = declaration->v.entity;
3856 type_t *type = declaration->type;
3857 create_local_initializer(initializer, dbgi, entity, type);
3860 static void create_declaration_initializer(declaration_t *declaration)
3862 initializer_t *initializer = declaration->init.initializer;
3863 if (initializer == NULL)
3866 declaration_kind_t declaration_kind
3867 = (declaration_kind_t) declaration->declaration_kind;
3868 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3869 create_initializer_local_variable_entity(declaration);
3873 type_t *type = declaration->type;
3874 type_qualifiers_t tq = get_type_qualifier(type, true);
3876 if (initializer->kind == INITIALIZER_VALUE) {
3877 initializer_value_t *initializer_value = &initializer->value;
3879 = get_dbg_info(&declaration->source_position);
3881 ir_node *value = expression_to_firm(initializer_value->value);
3882 value = do_strict_conv(dbgi, value);
3884 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3885 set_value(declaration->v.value_number, value);
3887 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3889 ir_entity *entity = declaration->v.entity;
3891 if (tq & TYPE_QUALIFIER_CONST) {
3892 set_entity_variability(entity, variability_constant);
3894 set_entity_variability(entity, variability_initialized);
3896 set_atomic_ent_value(entity, value);
3899 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3900 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3902 ir_entity *entity = declaration->v.entity;
3903 ir_initializer_t *irinitializer
3904 = create_ir_initializer(initializer, type);
3906 if (tq & TYPE_QUALIFIER_CONST) {
3907 set_entity_variability(entity, variability_constant);
3909 set_entity_variability(entity, variability_initialized);
3911 set_entity_initializer(entity, irinitializer);
3915 static void create_variable_length_array(declaration_t *declaration)
3917 /* initializers are not allowed for VLAs */
3918 assert(declaration->init.initializer == NULL);
3920 declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3921 declaration->v.vla_base = NULL;
3923 /* TODO: record VLA somewhere so we create the free node when we leave
3927 static void allocate_variable_length_array(declaration_t *declaration)
3929 /* initializers are not allowed for VLAs */
3930 assert(declaration->init.initializer == NULL);
3931 assert(get_cur_block() != NULL);
3933 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3934 type_t *type = declaration->type;
3935 ir_type *el_type = get_ir_type(type->array.element_type);
3937 /* make sure size_node is calculated */
3938 get_type_size(type);
3939 ir_node *elems = type->array.size_node;
3940 ir_node *mem = get_store();
3941 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3943 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3944 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3947 assert(declaration->declaration_kind
3948 == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3949 declaration->v.vla_base = addr;
3953 * Creates a Firm local variable from a declaration.
3955 static void create_local_variable(declaration_t *declaration)
3957 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3959 bool needs_entity = declaration->address_taken;
3960 type_t *type = skip_typeref(declaration->type);
3962 /* is it a variable length array? */
3963 if (is_type_array(type) && !type->array.size_constant) {
3964 create_variable_length_array(declaration);
3966 } else if (is_type_array(type) || is_type_compound(type)) {
3967 needs_entity = true;
3968 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3969 needs_entity = true;
3973 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3974 create_declaration_entity(declaration,
3975 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3978 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3979 declaration->v.value_number = next_value_number_function;
3980 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3981 ++next_value_number_function;
3985 static void create_local_static_variable(declaration_t *declaration)
3987 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3989 type_t *const type = skip_typeref(declaration->type);
3990 ir_type *const global_type = get_glob_type();
3991 ir_type *const irtype = get_ir_type(type);
3992 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
3994 size_t l = strlen(declaration->symbol->string);
3995 char buf[l + sizeof(".%u")];
3996 snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3997 ident *const id = id_unique(buf);
3999 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
4001 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4002 set_entity_volatility(entity, volatility_is_volatile);
4005 declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4006 declaration->v.entity = entity;
4007 set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
4008 set_entity_variability(entity, variability_uninitialized);
4009 set_entity_visibility(entity, visibility_local);
4010 set_entity_allocation(entity, allocation_static);
4012 ir_graph *const old_current_ir_graph = current_ir_graph;
4013 current_ir_graph = get_const_code_irg();
4015 create_declaration_initializer(declaration);
4017 assert(current_ir_graph == get_const_code_irg());
4018 current_ir_graph = old_current_ir_graph;
4023 static void return_statement_to_firm(return_statement_t *statement)
4025 if (get_cur_block() == NULL)
4028 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4029 ir_type *func_irtype = get_ir_type(current_function_decl->type);
4034 if (get_method_n_ress(func_irtype) > 0) {
4035 ir_type *res_type = get_method_res_type(func_irtype, 0);
4037 if (statement->value != NULL) {
4038 ir_node *node = expression_to_firm(statement->value);
4039 node = do_strict_conv(dbgi, node);
4043 if (is_compound_type(res_type)) {
4046 mode = get_type_mode(res_type);
4048 in[0] = new_Unknown(mode);
4052 /* build return_value for its side effects */
4053 if (statement->value != NULL) {
4054 expression_to_firm(statement->value);
4059 ir_node *store = get_store();
4060 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4062 ir_node *end_block = get_irg_end_block(current_ir_graph);
4063 add_immBlock_pred(end_block, ret);
4065 set_cur_block(NULL);
4068 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4070 if (get_cur_block() == NULL)
4073 return expression_to_firm(statement->expression);
4076 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4078 declaration_t *declaration = compound->scope.declarations;
4079 for( ; declaration != NULL; declaration = declaration->next) {
4080 create_local_declaration(declaration);
4083 ir_node *result = NULL;
4084 statement_t *statement = compound->statements;
4085 for( ; statement != NULL; statement = statement->base.next) {
4086 if (statement->base.next == NULL
4087 && statement->kind == STATEMENT_EXPRESSION) {
4088 result = expression_statement_to_firm(
4089 &statement->expression);
4092 statement_to_firm(statement);
4098 static void create_global_variable(declaration_t *declaration)
4102 switch ((storage_class_tag_t)declaration->storage_class) {
4103 case STORAGE_CLASS_STATIC:
4104 vis = visibility_local;
4107 case STORAGE_CLASS_EXTERN:
4108 vis = visibility_external_allocated;
4111 case STORAGE_CLASS_NONE:
4112 vis = visibility_external_visible;
4115 case STORAGE_CLASS_THREAD:
4116 vis = visibility_external_visible;
4119 case STORAGE_CLASS_THREAD_EXTERN:
4120 vis = visibility_external_allocated;
4123 case STORAGE_CLASS_THREAD_STATIC:
4124 vis = visibility_local;
4128 var_type = get_tls_type();
4132 var_type = get_glob_type();
4136 create_declaration_entity(declaration,
4137 DECLARATION_KIND_GLOBAL_VARIABLE,
4139 if (!is_type_function(skip_typeref(declaration->type))) {
4140 set_entity_visibility(declaration->v.entity, vis);
4145 case STORAGE_CLASS_TYPEDEF:
4146 case STORAGE_CLASS_AUTO:
4147 case STORAGE_CLASS_REGISTER:
4148 case STORAGE_CLASS_ENUM_ENTRY:
4151 panic("Invalid storage class for global variable");
4154 static void create_local_declaration(declaration_t *declaration)
4156 if (declaration->namespc != NAMESPACE_NORMAL)
4158 /* construct type */
4159 (void) get_ir_type(declaration->type);
4160 if (declaration->symbol == NULL) {
4164 type_t *type = skip_typeref(declaration->type);
4166 switch ((storage_class_tag_t) declaration->storage_class) {
4167 case STORAGE_CLASS_STATIC:
4168 create_local_static_variable(declaration);
4170 case STORAGE_CLASS_EXTERN:
4171 create_global_variable(declaration);
4172 create_declaration_initializer(declaration);
4174 case STORAGE_CLASS_NONE:
4175 case STORAGE_CLASS_AUTO:
4176 case STORAGE_CLASS_REGISTER:
4177 if (is_type_function(type)) {
4178 if (declaration->init.statement != NULL) {
4179 get_function_entity(declaration);
4180 declaration->declaration_kind = DECLARATION_KIND_INNER_FUNCTION;
4181 enqueue_inner_function(declaration);
4183 get_function_entity(declaration);
4186 create_local_variable(declaration);
4189 case STORAGE_CLASS_ENUM_ENTRY:
4190 /* should already be handled */
4191 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4193 case STORAGE_CLASS_TYPEDEF:
4194 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4196 case STORAGE_CLASS_THREAD:
4197 case STORAGE_CLASS_THREAD_EXTERN:
4198 case STORAGE_CLASS_THREAD_STATIC:
4201 panic("invalid storage class found");
4204 static void initialize_local_declaration(declaration_t *declaration)
4206 if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4209 switch ((declaration_kind_t) declaration->declaration_kind) {
4210 case DECLARATION_KIND_LOCAL_VARIABLE:
4211 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4212 create_declaration_initializer(declaration);
4215 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4216 allocate_variable_length_array(declaration);
4219 case DECLARATION_KIND_LABEL_BLOCK:
4220 case DECLARATION_KIND_COMPOUND_MEMBER:
4221 case DECLARATION_KIND_GLOBAL_VARIABLE:
4222 case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4223 case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4224 case DECLARATION_KIND_FUNCTION:
4225 case DECLARATION_KIND_TYPE:
4226 case DECLARATION_KIND_ENUM_ENTRY:
4227 case DECLARATION_KIND_INNER_FUNCTION:
4230 case DECLARATION_KIND_UNKNOWN:
4231 panic("can't initialize unknown declaration");
4233 panic("invalid declaration kind");
4236 static void declaration_statement_to_firm(declaration_statement_t *statement)
4238 declaration_t *declaration = statement->declarations_begin;
4239 declaration_t *end = statement->declarations_end->next;
4240 for( ; declaration != end; declaration = declaration->next) {
4241 if (declaration->namespc != NAMESPACE_NORMAL)
4243 initialize_local_declaration(declaration);
4247 static void if_statement_to_firm(if_statement_t *statement)
4249 ir_node *cur_block = get_cur_block();
4251 ir_node *fallthrough_block = NULL;
4253 /* the true (blocks) */
4254 ir_node *true_block = NULL;
4255 if (statement->true_statement != NULL) {
4256 true_block = new_immBlock();
4257 statement_to_firm(statement->true_statement);
4258 if (get_cur_block() != NULL) {
4259 ir_node *jmp = new_Jmp();
4260 if (fallthrough_block == NULL)
4261 fallthrough_block = new_immBlock();
4262 add_immBlock_pred(fallthrough_block, jmp);
4266 /* the false (blocks) */
4267 ir_node *false_block = NULL;
4268 if (statement->false_statement != NULL) {
4269 false_block = new_immBlock();
4271 statement_to_firm(statement->false_statement);
4272 if (get_cur_block() != NULL) {
4273 ir_node *jmp = new_Jmp();
4274 if (fallthrough_block == NULL)
4275 fallthrough_block = new_immBlock();
4276 add_immBlock_pred(fallthrough_block, jmp);
4280 /* create the condition */
4281 if (cur_block != NULL) {
4282 if (true_block == NULL || false_block == NULL) {
4283 if (fallthrough_block == NULL)
4284 fallthrough_block = new_immBlock();
4285 if (true_block == NULL)
4286 true_block = fallthrough_block;
4287 if (false_block == NULL)
4288 false_block = fallthrough_block;
4291 set_cur_block(cur_block);
4292 create_condition_evaluation(statement->condition, true_block,
4296 mature_immBlock(true_block);
4297 if (false_block != fallthrough_block && false_block != NULL) {
4298 mature_immBlock(false_block);
4300 if (fallthrough_block != NULL) {
4301 mature_immBlock(fallthrough_block);
4304 set_cur_block(fallthrough_block);
4307 static void while_statement_to_firm(while_statement_t *statement)
4309 ir_node *jmp = NULL;
4310 if (get_cur_block() != NULL) {
4314 /* create the header block */
4315 ir_node *header_block = new_immBlock();
4317 add_immBlock_pred(header_block, jmp);
4321 ir_node *old_continue_label = continue_label;
4322 ir_node *old_break_label = break_label;
4323 continue_label = header_block;
4326 ir_node *body_block = new_immBlock();
4327 statement_to_firm(statement->body);
4328 ir_node *false_block = break_label;
4330 assert(continue_label == header_block);
4331 continue_label = old_continue_label;
4332 break_label = old_break_label;
4334 if (get_cur_block() != NULL) {
4336 add_immBlock_pred(header_block, jmp);
4339 /* shortcut for while(true) */
4340 if (is_constant_expression(statement->condition)
4341 && fold_constant(statement->condition) != 0) {
4342 set_cur_block(header_block);
4343 ir_node *header_jmp = new_Jmp();
4344 add_immBlock_pred(body_block, header_jmp);
4346 keep_alive(body_block);
4347 keep_all_memory(body_block);
4348 set_cur_block(body_block);
4350 if (false_block == NULL) {
4351 false_block = new_immBlock();
4354 /* create the condition */
4355 set_cur_block(header_block);
4357 create_condition_evaluation(statement->condition, body_block,
4361 mature_immBlock(body_block);
4362 mature_immBlock(header_block);
4363 if (false_block != NULL) {
4364 mature_immBlock(false_block);
4367 set_cur_block(false_block);
4370 static void do_while_statement_to_firm(do_while_statement_t *statement)
4372 ir_node *jmp = NULL;
4373 if (get_cur_block() != NULL) {
4377 /* create the header block */
4378 ir_node *header_block = new_immBlock();
4381 ir_node *body_block = new_immBlock();
4383 add_immBlock_pred(body_block, jmp);
4386 ir_node *old_continue_label = continue_label;
4387 ir_node *old_break_label = break_label;
4388 continue_label = header_block;
4391 statement_to_firm(statement->body);
4392 ir_node *false_block = break_label;
4394 assert(continue_label == header_block);
4395 continue_label = old_continue_label;
4396 break_label = old_break_label;
4398 if (get_cur_block() != NULL) {
4399 ir_node *body_jmp = new_Jmp();
4400 add_immBlock_pred(header_block, body_jmp);
4401 mature_immBlock(header_block);
4404 if (false_block == NULL) {
4405 false_block = new_immBlock();
4408 /* create the condition */
4409 set_cur_block(header_block);
4411 create_condition_evaluation(statement->condition, body_block, false_block);
4412 mature_immBlock(body_block);
4413 mature_immBlock(header_block);
4414 if (false_block != NULL) {
4415 mature_immBlock(false_block);
4418 set_cur_block(false_block);
4421 static void for_statement_to_firm(for_statement_t *statement)
4423 ir_node *jmp = NULL;
4425 /* create declarations */
4426 declaration_t *declaration = statement->scope.declarations;
4427 for( ; declaration != NULL; declaration = declaration->next) {
4428 create_local_declaration(declaration);
4431 if (get_cur_block() != NULL) {
4432 declaration = statement->scope.declarations;
4433 for( ; declaration != NULL; declaration = declaration->next) {
4434 initialize_local_declaration(declaration);
4437 if (statement->initialisation != NULL) {
4438 expression_to_firm(statement->initialisation);
4445 /* create the step block */
4446 ir_node *const step_block = new_immBlock();
4447 if (statement->step != NULL) {
4448 expression_to_firm(statement->step);
4450 ir_node *const step_jmp = new_Jmp();
4452 /* create the header block */
4453 ir_node *const header_block = new_immBlock();
4455 add_immBlock_pred(header_block, jmp);
4457 add_immBlock_pred(header_block, step_jmp);
4459 /* the false block */
4460 ir_node *const false_block = new_immBlock();
4463 ir_node * body_block;
4464 if (statement->body != NULL) {
4465 ir_node *const old_continue_label = continue_label;
4466 ir_node *const old_break_label = break_label;
4467 continue_label = step_block;
4468 break_label = false_block;
4470 body_block = new_immBlock();
4471 statement_to_firm(statement->body);
4473 assert(continue_label == step_block);
4474 assert(break_label == false_block);
4475 continue_label = old_continue_label;
4476 break_label = old_break_label;
4478 if (get_cur_block() != NULL) {
4480 add_immBlock_pred(step_block, jmp);
4483 body_block = step_block;
4486 /* create the condition */
4487 set_cur_block(header_block);
4488 if (statement->condition != NULL) {
4489 create_condition_evaluation(statement->condition, body_block,
4492 keep_alive(header_block);
4493 keep_all_memory(header_block);
4495 add_immBlock_pred(body_block, jmp);
4498 mature_immBlock(body_block);
4499 mature_immBlock(false_block);
4500 mature_immBlock(step_block);
4501 mature_immBlock(header_block);
4502 mature_immBlock(false_block);
4504 set_cur_block(false_block);
4507 static void create_jump_statement(const statement_t *statement,
4508 ir_node *target_block)
4510 if (get_cur_block() == NULL)
4513 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4514 ir_node *jump = new_d_Jmp(dbgi);
4515 add_immBlock_pred(target_block, jump);
4517 set_cur_block(NULL);
4520 static ir_node *get_break_label(void)
4522 if (break_label == NULL) {
4523 ir_node *cur_block = get_cur_block();
4524 break_label = new_immBlock();
4525 set_cur_block(cur_block);
4530 static void switch_statement_to_firm(switch_statement_t *statement)
4532 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4534 ir_node *expression = expression_to_firm(statement->expression);
4535 ir_node *cond = new_d_Cond(dbgi, expression);
4537 set_cur_block(NULL);
4539 ir_node *const old_switch_cond = current_switch_cond;
4540 ir_node *const old_break_label = break_label;
4541 const bool old_saw_default_label = saw_default_label;
4542 saw_default_label = false;
4543 current_switch_cond = cond;
4545 switch_statement_t *const old_switch = current_switch;
4546 current_switch = statement;
4548 /* determine a free number for the default label */
4549 unsigned long num_cases = 0;
4551 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4552 if (l->expression == NULL) {
4556 if (l->last_case >= l->first_case)
4557 num_cases += l->last_case - l->first_case;
4558 if (l->last_case > def_nr)
4559 def_nr = l->last_case;
4562 if (def_nr + 1 < 0) {
4563 /* Bad: an overflow occurred, we cannot be sure that the
4564 * maximum + 1 is a free number. Scan the values a second
4565 * time to find a free number.
4567 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4570 memset(bits, 0, (num_cases + 7) >> 3);
4571 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4572 if (l->expression == NULL) {
4576 for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4577 if (cns >= 0 && (unsigned long)cns < num_cases)
4578 bits[cns >> 3] |= (1 << (cns & 7));
4581 /* We look at the first num_cases constants:
4582 * Either they are densed, so we took the last (num_cases)
4583 * one, or they are non densed, so we will find one free
4586 for (i = 0; i < num_cases; ++i)
4587 if ((bits[i >> 3] & (i & 7)) == 0)
4595 statement->default_proj_nr = def_nr;
4597 if (statement->body != NULL) {
4598 statement_to_firm(statement->body);
4601 if (get_cur_block() != NULL) {
4602 ir_node *jmp = new_Jmp();
4603 add_immBlock_pred(get_break_label(), jmp);
4606 if (!saw_default_label) {
4607 set_cur_block(get_nodes_block(cond));
4608 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4609 statement->default_proj_nr);
4610 add_immBlock_pred(get_break_label(), proj);
4613 if (break_label != NULL) {
4614 mature_immBlock(break_label);
4616 set_cur_block(break_label);
4618 assert(current_switch_cond == cond);
4619 current_switch = old_switch;
4620 current_switch_cond = old_switch_cond;
4621 break_label = old_break_label;
4622 saw_default_label = old_saw_default_label;
4625 static void case_label_to_firm(const case_label_statement_t *statement)
4627 if (statement->is_empty_range)
4630 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4632 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4635 ir_node *old_block = get_nodes_block(current_switch_cond);
4636 ir_node *block = new_immBlock();
4638 set_cur_block(old_block);
4639 if (statement->expression != NULL) {
4640 long pn = statement->first_case;
4641 long end_pn = statement->last_case;
4642 assert(pn <= end_pn);
4643 /* create jumps for all cases in the given range */
4645 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4646 add_immBlock_pred(block, proj);
4647 } while(pn++ < end_pn);
4649 saw_default_label = true;
4650 proj = new_d_defaultProj(dbgi, current_switch_cond,
4651 current_switch->default_proj_nr);
4653 add_immBlock_pred(block, proj);
4656 if (fallthrough != NULL) {
4657 add_immBlock_pred(block, fallthrough);
4659 mature_immBlock(block);
4660 set_cur_block(block);
4662 if (statement->statement != NULL) {
4663 statement_to_firm(statement->statement);
4667 static void label_to_firm(const label_statement_t *statement)
4669 ir_node *block = get_label_block(statement->label);
4671 if (get_cur_block() != NULL) {
4672 ir_node *jmp = new_Jmp();
4673 add_immBlock_pred(block, jmp);
4676 set_cur_block(block);
4678 keep_all_memory(block);
4680 if (statement->statement != NULL) {
4681 statement_to_firm(statement->statement);
4685 static void goto_to_firm(const goto_statement_t *statement)
4687 if (get_cur_block() == NULL)
4690 if (statement->expression) {
4691 ir_node *irn = expression_to_firm(statement->expression);
4692 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4693 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4695 set_irn_link(ijmp, ijmp_list);
4698 if (statement->outer_fkt_jmp) {
4699 /* TODO: this is a outer function jmp */
4700 panic("outer function jump not implemented");
4702 ir_node *block = get_label_block(statement->label);
4703 ir_node *jmp = new_Jmp();
4704 add_immBlock_pred(block, jmp);
4707 set_cur_block(NULL);
4710 static void asm_statement_to_firm(const asm_statement_t *statement)
4712 bool needs_memory = false;
4714 if (statement->is_volatile) {
4715 needs_memory = true;
4718 size_t n_clobbers = 0;
4719 asm_clobber_t *clobber = statement->clobbers;
4720 for( ; clobber != NULL; clobber = clobber->next) {
4721 const char *clobber_str = clobber->clobber.begin;
4723 if (!be_is_valid_clobber(clobber_str)) {
4724 errorf(&statement->base.source_position,
4725 "invalid clobber '%s' specified", clobber->clobber);
4729 if (strcmp(clobber_str, "memory") == 0) {
4730 needs_memory = true;
4734 ident *id = new_id_from_str(clobber_str);
4735 obstack_ptr_grow(&asm_obst, id);
4738 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4739 ident **clobbers = NULL;
4740 if (n_clobbers > 0) {
4741 clobbers = obstack_finish(&asm_obst);
4744 size_t n_inputs = 0;
4745 asm_argument_t *argument = statement->inputs;
4746 for ( ; argument != NULL; argument = argument->next)
4748 size_t n_outputs = 0;
4749 argument = statement->outputs;
4750 for ( ; argument != NULL; argument = argument->next)
4753 unsigned next_pos = 0;
4755 ir_node *ins[n_inputs + n_outputs + 1];
4758 ir_asm_constraint tmp_in_constraints[n_outputs];
4760 const expression_t *out_exprs[n_outputs];
4761 ir_node *out_addrs[n_outputs];
4762 size_t out_size = 0;
4764 argument = statement->outputs;
4765 for ( ; argument != NULL; argument = argument->next) {
4766 const char *constraints = argument->constraints.begin;
4767 asm_constraint_flags_t asm_flags
4768 = be_parse_asm_constraints(constraints);
4770 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4771 errorf(&statement->base.source_position,
4772 "some constraints in '%s' are not supported", constraints);
4775 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4776 errorf(&statement->base.source_position,
4777 "some constraints in '%s' are invalid", constraints);
4780 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4781 errorf(&statement->base.source_position,
4782 "no write flag specified for output constraints '%s'",
4787 unsigned pos = next_pos++;
4788 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4789 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4790 expression_t *expr = argument->expression;
4791 ir_node *addr = expression_to_addr(expr);
4792 /* in+output, construct an artifical same_as constraint on the
4794 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4796 ir_node *value = get_value_from_lvalue(expr, addr);
4798 snprintf(buf, sizeof(buf), "%d", pos);
4800 ir_asm_constraint constraint;
4801 constraint.pos = pos;
4802 constraint.constraint = new_id_from_str(buf);
4803 constraint.mode = get_ir_mode(expr->base.type);
4804 tmp_in_constraints[in_size] = constraint;
4805 ins[in_size] = value;
4810 out_exprs[out_size] = expr;
4811 out_addrs[out_size] = addr;
4813 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4814 /* pure memory ops need no input (but we have to make sure we
4815 * attach to the memory) */
4816 assert(! (asm_flags &
4817 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4818 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4819 needs_memory = true;
4821 /* we need to attach the address to the inputs */
4822 expression_t *expr = argument->expression;
4824 ir_asm_constraint constraint;
4825 constraint.pos = pos;
4826 constraint.constraint = new_id_from_str(constraints);
4827 constraint.mode = NULL;
4828 tmp_in_constraints[in_size] = constraint;
4830 ins[in_size] = expression_to_addr(expr);
4834 errorf(&statement->base.source_position,
4835 "only modifiers but no place set in constraints '%s'",
4840 ir_asm_constraint constraint;
4841 constraint.pos = pos;
4842 constraint.constraint = new_id_from_str(constraints);
4843 constraint.mode = get_ir_mode(argument->expression->base.type);
4845 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4847 assert(obstack_object_size(&asm_obst)
4848 == out_size * sizeof(ir_asm_constraint));
4849 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4852 obstack_grow(&asm_obst, tmp_in_constraints,
4853 in_size * sizeof(tmp_in_constraints[0]));
4854 /* find and count input and output arguments */
4855 argument = statement->inputs;
4856 for( ; argument != NULL; argument = argument->next) {
4857 const char *constraints = argument->constraints.begin;
4858 asm_constraint_flags_t asm_flags
4859 = be_parse_asm_constraints(constraints);
4861 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4862 errorf(&statement->base.source_position,
4863 "some constraints in '%s' are not supported", constraints);
4866 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4867 errorf(&statement->base.source_position,
4868 "some constraints in '%s' are invalid", constraints);
4871 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4872 errorf(&statement->base.source_position,
4873 "write flag specified for input constraints '%s'",
4879 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4880 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4881 /* we can treat this as "normal" input */
4882 input = expression_to_firm(argument->expression);
4883 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4884 /* pure memory ops need no input (but we have to make sure we
4885 * attach to the memory) */
4886 assert(! (asm_flags &
4887 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4888 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4889 needs_memory = true;
4890 input = expression_to_addr(argument->expression);
4892 errorf(&statement->base.source_position,
4893 "only modifiers but no place set in constraints '%s'",
4898 ir_asm_constraint constraint;
4899 constraint.pos = next_pos++;
4900 constraint.constraint = new_id_from_str(constraints);
4901 constraint.mode = get_irn_mode(input);
4903 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4904 ins[in_size++] = input;
4908 ir_asm_constraint constraint;
4909 constraint.pos = next_pos++;
4910 constraint.constraint = new_id_from_str("");
4911 constraint.mode = mode_M;
4913 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4914 ins[in_size++] = get_store();
4917 assert(obstack_object_size(&asm_obst)
4918 == in_size * sizeof(ir_asm_constraint));
4919 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4921 /* create asm node */
4922 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4924 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4926 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4927 out_size, output_constraints,
4928 n_clobbers, clobbers, asm_text);
4930 if (statement->is_volatile) {
4931 set_irn_pinned(node, op_pin_state_pinned);
4933 set_irn_pinned(node, op_pin_state_floats);
4936 /* create output projs & connect them */
4938 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4943 for (i = 0; i < out_size; ++i) {
4944 const expression_t *out_expr = out_exprs[i];
4946 ir_mode *mode = get_ir_mode(out_expr->base.type);
4947 ir_node *proj = new_Proj(node, mode, pn);
4948 ir_node *addr = out_addrs[i];
4950 set_value_for_expression_addr(out_expr, proj, addr);
4954 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
4955 statement_to_firm(statement->try_statement);
4956 warningf(&statement->base.source_position, "structured exception handling ignored");
4959 static void leave_statement_to_firm(leave_statement_t *statement) {
4960 errorf(&statement->base.source_position, "__leave not supported yet");
4964 * Transform a statement.
4966 static void statement_to_firm(statement_t *statement)
4969 assert(!statement->base.transformed);
4970 statement->base.transformed = true;
4973 switch(statement->kind) {
4974 case STATEMENT_INVALID:
4975 panic("invalid statement found");
4977 case STATEMENT_EMPTY:
4980 case STATEMENT_COMPOUND:
4981 compound_statement_to_firm(&statement->compound);
4983 case STATEMENT_RETURN:
4984 return_statement_to_firm(&statement->returns);
4986 case STATEMENT_EXPRESSION:
4987 expression_statement_to_firm(&statement->expression);
4990 if_statement_to_firm(&statement->ifs);
4992 case STATEMENT_WHILE:
4993 while_statement_to_firm(&statement->whiles);
4995 case STATEMENT_DO_WHILE:
4996 do_while_statement_to_firm(&statement->do_while);
4998 case STATEMENT_DECLARATION:
4999 declaration_statement_to_firm(&statement->declaration);
5001 case STATEMENT_BREAK:
5002 create_jump_statement(statement, get_break_label());
5004 case STATEMENT_CONTINUE:
5005 create_jump_statement(statement, continue_label);
5007 case STATEMENT_SWITCH:
5008 switch_statement_to_firm(&statement->switchs);
5010 case STATEMENT_CASE_LABEL:
5011 case_label_to_firm(&statement->case_label);
5014 for_statement_to_firm(&statement->fors);
5016 case STATEMENT_LABEL:
5017 label_to_firm(&statement->label);
5019 case STATEMENT_GOTO:
5020 goto_to_firm(&statement->gotos);
5023 asm_statement_to_firm(&statement->asms);
5025 case STATEMENT_MS_TRY:
5026 ms_try_statement_to_firm(&statement->ms_try);
5028 case STATEMENT_LEAVE:
5029 leave_statement_to_firm(&statement->leave);
5032 panic("Statement not implemented\n");
5035 static int count_decls_in_expression(const expression_t *expression);
5037 static int count_local_declarations(const declaration_t * decl,
5038 const declaration_t *const end)
5041 for (; decl != end; decl = decl->next) {
5042 if (decl->namespc != NAMESPACE_NORMAL)
5044 type_t *type = skip_typeref(decl->type);
5046 if (!decl->address_taken && is_type_scalar(type))
5048 const initializer_t *initializer = decl->init.initializer;
5049 /* FIXME: should walk initializer hierarchies... */
5050 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
5051 count += count_decls_in_expression(initializer->value.value);
5057 static int count_decls_in_expression(const expression_t *expression) {
5060 if (expression == NULL)
5063 switch((expression_kind_t) expression->base.kind) {
5064 case EXPR_STATEMENT:
5065 return count_decls_in_stmts(expression->statement.statement);
5067 int count_left = count_decls_in_expression(expression->binary.left);
5068 int count_right = count_decls_in_expression(expression->binary.right);
5069 return count_left + count_right;
5072 return count_decls_in_expression(expression->unary.value);
5074 call_argument_t *argument = expression->call.arguments;
5075 for( ; argument != NULL; argument = argument->next) {
5076 count += count_decls_in_expression(argument->expression);
5083 panic("unexpected expression kind");
5085 case EXPR_COMPOUND_LITERAL:
5089 case EXPR_CONDITIONAL:
5090 count += count_decls_in_expression(expression->conditional.condition);
5091 count += count_decls_in_expression(expression->conditional.true_expression);
5092 count += count_decls_in_expression(expression->conditional.false_expression);
5095 case EXPR_BUILTIN_PREFETCH:
5096 count += count_decls_in_expression(expression->builtin_prefetch.adr);
5097 count += count_decls_in_expression(expression->builtin_prefetch.rw);
5098 count += count_decls_in_expression(expression->builtin_prefetch.locality);
5101 case EXPR_BUILTIN_CONSTANT_P:
5102 count += count_decls_in_expression(expression->builtin_constant.value);
5106 count += count_decls_in_expression(expression->select.compound);
5109 case EXPR_ARRAY_ACCESS:
5110 count += count_decls_in_expression(expression->array_access.array_ref);
5111 count += count_decls_in_expression(expression->array_access.index);
5114 case EXPR_CLASSIFY_TYPE:
5115 count += count_decls_in_expression(expression->classify_type.type_expression);
5119 case EXPR_ALIGNOF: {
5120 expression_t *tp_expression = expression->typeprop.tp_expression;
5121 if (tp_expression != NULL) {
5122 count += count_decls_in_expression(tp_expression);
5128 case EXPR_REFERENCE:
5130 case EXPR_CHARACTER_CONSTANT:
5131 case EXPR_WIDE_CHARACTER_CONSTANT:
5132 case EXPR_STRING_LITERAL:
5133 case EXPR_WIDE_STRING_LITERAL:
5135 case EXPR_BUILTIN_SYMBOL:
5138 case EXPR_LABEL_ADDRESS:
5142 /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5143 * (or implement all the missing expressions here/implement a walker)
5149 static int count_decls_in_stmts(const statement_t *stmt)
5152 for (; stmt != NULL; stmt = stmt->base.next) {
5153 switch (stmt->kind) {
5154 case STATEMENT_EMPTY:
5157 case STATEMENT_DECLARATION: {
5158 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5159 count += count_local_declarations(decl_stmt->declarations_begin,
5160 decl_stmt->declarations_end->next);
5164 case STATEMENT_COMPOUND: {
5165 const compound_statement_t *const comp =
5167 count += count_decls_in_stmts(comp->statements);
5171 case STATEMENT_IF: {
5172 const if_statement_t *const if_stmt = &stmt->ifs;
5173 count += count_decls_in_expression(if_stmt->condition);
5174 count += count_decls_in_stmts(if_stmt->true_statement);
5175 count += count_decls_in_stmts(if_stmt->false_statement);
5179 case STATEMENT_SWITCH: {
5180 const switch_statement_t *const switch_stmt = &stmt->switchs;
5181 count += count_decls_in_expression(switch_stmt->expression);
5182 count += count_decls_in_stmts(switch_stmt->body);
5186 case STATEMENT_LABEL: {
5187 const label_statement_t *const label_stmt = &stmt->label;
5188 if (label_stmt->statement != NULL) {
5189 count += count_decls_in_stmts(label_stmt->statement);
5194 case STATEMENT_WHILE: {
5195 const while_statement_t *const while_stmt = &stmt->whiles;
5196 count += count_decls_in_expression(while_stmt->condition);
5197 count += count_decls_in_stmts(while_stmt->body);
5201 case STATEMENT_DO_WHILE: {
5202 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5203 count += count_decls_in_expression(do_while_stmt->condition);
5204 count += count_decls_in_stmts(do_while_stmt->body);
5208 case STATEMENT_FOR: {
5209 const for_statement_t *const for_stmt = &stmt->fors;
5210 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5211 count += count_decls_in_expression(for_stmt->initialisation);
5212 count += count_decls_in_expression(for_stmt->condition);
5213 count += count_decls_in_expression(for_stmt->step);
5214 count += count_decls_in_stmts(for_stmt->body);
5218 case STATEMENT_CASE_LABEL: {
5219 const case_label_statement_t *label = &stmt->case_label;
5220 count += count_decls_in_expression(label->expression);
5221 if (label->statement != NULL) {
5222 count += count_decls_in_stmts(label->statement);
5228 case STATEMENT_BREAK:
5229 case STATEMENT_CONTINUE:
5232 case STATEMENT_EXPRESSION: {
5233 const expression_statement_t *expr_stmt = &stmt->expression;
5234 count += count_decls_in_expression(expr_stmt->expression);
5238 case STATEMENT_GOTO:
5239 case STATEMENT_LEAVE:
5240 case STATEMENT_INVALID:
5243 case STATEMENT_RETURN: {
5244 const return_statement_t *ret_stmt = &stmt->returns;
5245 count += count_decls_in_expression(ret_stmt->value);
5249 case STATEMENT_MS_TRY: {
5250 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5251 count += count_decls_in_stmts(try_stmt->try_statement);
5252 if (try_stmt->except_expression != NULL)
5253 count += count_decls_in_expression(try_stmt->except_expression);
5254 count += count_decls_in_stmts(try_stmt->final_statement);
5262 static int get_function_n_local_vars(declaration_t *declaration)
5266 /* count parameters */
5267 count += count_local_declarations(declaration->scope.declarations, NULL);
5269 /* count local variables declared in body */
5270 count += count_decls_in_stmts(declaration->init.statement);
5275 static void initialize_function_parameters(declaration_t *declaration)
5277 ir_graph *irg = current_ir_graph;
5278 ir_node *args = get_irg_args(irg);
5279 ir_node *start_block = get_irg_start_block(irg);
5280 ir_type *function_irtype = get_ir_type(declaration->type);
5283 declaration_t *parameter = declaration->scope.declarations;
5284 for( ; parameter != NULL; parameter = parameter->next, ++n) {
5285 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5286 type_t *type = skip_typeref(parameter->type);
5288 bool needs_entity = parameter->address_taken;
5289 assert(!is_type_array(type));
5290 if (is_type_compound(type)) {
5291 needs_entity = true;
5295 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5296 ident *id = new_id_from_str(parameter->symbol->string);
5297 set_entity_ident(entity, id);
5299 parameter->declaration_kind
5300 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5301 parameter->v.entity = entity;
5305 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5306 ir_mode *param_mode = get_type_mode(param_irtype);
5309 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5311 ir_mode *mode = get_ir_mode(type);
5312 value = create_conv(NULL, value, mode);
5313 value = do_strict_conv(NULL, value);
5315 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5316 parameter->v.value_number = next_value_number_function;
5317 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5318 ++next_value_number_function;
5320 set_value(parameter->v.value_number, value);
5325 * Handle additional decl modifiers for IR-graphs
5327 * @param irg the IR-graph
5328 * @param dec_modifiers additional modifiers
5330 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5332 if (decl_modifiers & DM_NORETURN) {
5333 /* TRUE if the declaration includes the Microsoft
5334 __declspec(noreturn) specifier. */
5335 set_irg_additional_property(irg, mtp_property_noreturn);
5337 if (decl_modifiers & DM_NOTHROW) {
5338 /* TRUE if the declaration includes the Microsoft
5339 __declspec(nothrow) specifier. */
5340 set_irg_additional_property(irg, mtp_property_nothrow);
5342 if (decl_modifiers & DM_NAKED) {
5343 /* TRUE if the declaration includes the Microsoft
5344 __declspec(naked) specifier. */
5345 set_irg_additional_property(irg, mtp_property_naked);
5347 if (decl_modifiers & DM_FORCEINLINE) {
5348 /* TRUE if the declaration includes the
5349 Microsoft __forceinline specifier. */
5350 set_irg_inline_property(irg, irg_inline_forced);
5352 if (decl_modifiers & DM_NOINLINE) {
5353 /* TRUE if the declaration includes the Microsoft
5354 __declspec(noinline) specifier. */
5355 set_irg_inline_property(irg, irg_inline_forbidden);
5359 static void add_function_pointer(ir_type *segment, ir_entity *method,
5360 const char *unique_template)
5362 ir_type *method_type = get_entity_type(method);
5363 ident *id = id_unique(unique_template);
5364 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5366 ident *ide = id_unique(unique_template);
5367 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5368 ir_graph *irg = get_const_code_irg();
5369 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5372 set_entity_compiler_generated(ptr, 1);
5373 set_entity_variability(ptr, variability_constant);
5374 set_atomic_ent_value(ptr, val);
5378 * Generate possible IJmp branches to a given label block.
5380 static void gen_ijmp_branches(ir_node *block) {
5382 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5383 add_immBlock_pred(block, ijmp);
5388 * Create code for a function.
5390 static void create_function(declaration_t *declaration)
5392 ir_entity *function_entity = get_function_entity(declaration);
5394 if (declaration->init.statement == NULL)
5397 if (declaration->modifiers & DM_CONSTRUCTOR) {
5398 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5399 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5401 if (declaration->modifiers & DM_DESTRUCTOR) {
5402 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5403 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5406 current_function_decl = declaration;
5407 current_function_name = NULL;
5408 current_funcsig = NULL;
5410 assert(all_labels == NULL);
5411 all_labels = NEW_ARR_F(declaration_t *, 0);
5414 int n_local_vars = get_function_n_local_vars(declaration);
5415 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5417 ir_graph *old_current_function = current_function;
5418 current_function = irg;
5420 set_irg_fp_model(irg, firm_opt.fp_model);
5421 tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5422 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5424 ir_node *first_block = get_cur_block();
5426 /* set inline flags */
5427 if (declaration->is_inline)
5428 set_irg_inline_property(irg, irg_inline_recomended);
5429 handle_decl_modifier_irg(irg, declaration->modifiers);
5431 next_value_number_function = 0;
5432 initialize_function_parameters(declaration);
5434 statement_to_firm(declaration->init.statement);
5436 ir_node *end_block = get_irg_end_block(irg);
5438 /* do we have a return statement yet? */
5439 if (get_cur_block() != NULL) {
5440 type_t *type = skip_typeref(declaration->type);
5441 assert(is_type_function(type));
5442 const function_type_t *func_type = &type->function;
5443 const type_t *return_type
5444 = skip_typeref(func_type->return_type);
5447 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5448 ret = new_Return(get_store(), 0, NULL);
5451 if (is_type_scalar(return_type)) {
5452 mode = get_ir_mode(func_type->return_type);
5458 /* ยง5.1.2.2.3 main implicitly returns 0 */
5459 if (strcmp(declaration->symbol->string, "main") == 0) {
5460 in[0] = new_Const(mode, get_mode_null(mode));
5462 in[0] = new_Unknown(mode);
5464 ret = new_Return(get_store(), 1, in);
5466 add_immBlock_pred(end_block, ret);
5469 bool has_computed_gotos = false;
5470 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5471 declaration_t *label = all_labels[i];
5472 if (label->address_taken) {
5473 gen_ijmp_branches(label->v.block);
5474 has_computed_gotos = true;
5476 mature_immBlock(label->v.block);
5478 if (has_computed_gotos) {
5479 /* if we have computed goto's in the function, we cannot inline it */
5480 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5481 warningf(&declaration->source_position,
5482 "function '%Y' can never be inlined because it contains a computed goto",
5483 declaration->symbol);
5485 set_irg_inline_property(irg, irg_inline_forbidden);
5488 DEL_ARR_F(all_labels);
5491 mature_immBlock(first_block);
5492 mature_immBlock(end_block);
5494 irg_finalize_cons(irg);
5496 /* finalize the frame type */
5497 ir_type *frame_type = get_irg_frame_type(irg);
5498 int n = get_compound_n_members(frame_type);
5501 for(int i = 0; i < n; ++i) {
5502 ir_entity *entity = get_compound_member(frame_type, i);
5503 ir_type *entity_type = get_entity_type(entity);
5505 int align = get_type_alignment_bytes(entity_type);
5506 if (align > align_all)
5510 misalign = offset % align;
5512 offset += align - misalign;
5516 set_entity_offset(entity, offset);
5517 offset += get_type_size_bytes(entity_type);
5519 set_type_size_bytes(frame_type, offset);
5520 set_type_alignment_bytes(frame_type, align_all);
5523 current_function = old_current_function;
5526 static void scope_to_firm(scope_t *scope)
5528 /* first pass: create declarations */
5529 declaration_t *declaration = scope->declarations;
5530 for( ; declaration != NULL; declaration = declaration->next) {
5531 if (declaration->namespc != NAMESPACE_NORMAL)
5533 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5534 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5536 if (declaration->symbol == NULL)
5539 type_t *type = skip_typeref(declaration->type);
5540 if (is_type_function(type)) {
5541 get_function_entity(declaration);
5543 create_global_variable(declaration);
5547 /* second pass: create code/initializers */
5548 declaration = scope->declarations;
5549 for( ; declaration != NULL; declaration = declaration->next) {
5550 if (declaration->namespc != NAMESPACE_NORMAL)
5552 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5553 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5555 if (declaration->symbol == NULL)
5558 type_t *type = declaration->type;
5559 if (type->kind == TYPE_FUNCTION) {
5560 create_function(declaration);
5561 declaration_t *inner;
5562 for (inner = next_inner_function(); inner != NULL;
5563 inner = next_inner_function())
5564 create_function(inner);
5566 assert(declaration->declaration_kind
5567 == DECLARATION_KIND_GLOBAL_VARIABLE);
5568 current_ir_graph = get_const_code_irg();
5569 create_declaration_initializer(declaration);
5574 static void set_be_option(const char *option)
5576 int res = firm_be_option(option);
5580 void init_ast2firm(void)
5582 obstack_init(&asm_obst);
5583 init_atomic_modes();
5585 id_underscore = new_id_from_chars("_", 1);
5586 id_imp = new_id_from_chars("__imp_", 6);
5588 /* OS option must be set to the backend */
5589 switch (firm_opt.os_support) {
5590 case OS_SUPPORT_MINGW:
5591 create_ld_ident = create_ld_ident_win32;
5592 set_be_option("ia32-gasmode=mingw");
5594 case OS_SUPPORT_LINUX:
5595 create_ld_ident = create_ld_ident_linux_elf;
5596 set_be_option("ia32-gasmode=elf");
5598 case OS_SUPPORT_MACHO:
5599 create_ld_ident = create_ld_ident_macho;
5600 set_be_option("ia32-gasmode=macho");
5601 set_be_option("ia32-stackalign=4");
5602 set_be_option("pic");
5606 /* create idents for all known runtime functions */
5607 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5608 rts_idents[i] = new_id_from_str(rts_data[i].name);
5611 entitymap_init(&entitymap);
5614 static void init_ir_types(void)
5616 static int ir_types_initialized = 0;
5617 if (ir_types_initialized)
5619 ir_types_initialized = 1;
5621 ir_type_int = get_ir_type(type_int);
5622 ir_type_const_char = get_ir_type(type_const_char);
5623 ir_type_wchar_t = get_ir_type(type_wchar_t);
5624 ir_type_void = get_ir_type(type_void);
5627 void exit_ast2firm(void)
5629 entitymap_destroy(&entitymap);
5630 obstack_free(&asm_obst, NULL);
5633 static void global_asm_to_firm(statement_t *s)
5635 for (; s != NULL; s = s->base.next) {
5636 assert(s->kind == STATEMENT_ASM);
5638 char const *const text = s->asms.asm_text.begin;
5639 size_t size = s->asms.asm_text.size;
5641 /* skip the last \0 */
5642 if (text[size - 1] == '\0')
5645 ident *const id = new_id_from_chars(text, size);
5650 void translation_unit_to_firm(translation_unit_t *unit)
5652 /* just to be sure */
5653 continue_label = NULL;
5655 current_switch_cond = NULL;
5659 scope_to_firm(&unit->scope);
5660 global_asm_to_firm(unit->global_asm);
5662 current_ir_graph = NULL;