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%u", 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%u", 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%u", 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 type_t *const type = skip_typeref(declaration->type);
1538 ir_mode *const mode = get_ir_mode(type);
1539 return create_symconst(dbgi, mode, declaration->v.entity);
1542 case DECLARATION_KIND_INNER_FUNCTION:
1543 case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1544 case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1545 case DECLARATION_KIND_COMPOUND_MEMBER:
1546 case DECLARATION_KIND_LABEL_BLOCK:
1547 panic("not implemented reference type");
1550 panic("reference to declaration with unknown type found");
1554 * Transform calls to builtin functions.
1556 static ir_node *process_builtin_call(const call_expression_t *call)
1558 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1560 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1561 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1563 type_t *type = skip_typeref(builtin->base.type);
1564 assert(is_type_pointer(type));
1566 type_t *function_type = skip_typeref(type->pointer.points_to);
1567 symbol_t *symbol = builtin->symbol;
1569 switch(symbol->ID) {
1570 case T___builtin_alloca: {
1571 if (call->arguments == NULL || call->arguments->next != NULL) {
1572 panic("invalid number of parameters on __builtin_alloca");
1574 expression_t *argument = call->arguments->expression;
1575 ir_node *size = expression_to_firm(argument);
1577 ir_node *store = get_store();
1578 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1580 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1582 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1587 case T___builtin_huge_val:
1588 case T___builtin_inf:
1589 case T___builtin_inff:
1590 case T___builtin_infl: {
1591 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1592 tarval *tv = get_mode_infinite(mode);
1593 ir_node *res = new_d_Const(dbgi, mode, tv);
1596 case T___builtin_nan:
1597 case T___builtin_nanf:
1598 case T___builtin_nanl: {
1599 /* Ignore string for now... */
1600 assert(is_type_function(function_type));
1601 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1602 tarval *tv = get_mode_NAN(mode);
1603 ir_node *res = new_d_Const(dbgi, mode, tv);
1606 case T___builtin_va_end:
1609 panic("Unsupported builtin found\n");
1614 * Transform a call expression.
1615 * Handles some special cases, like alloca() calls, which must be resolved
1616 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1617 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1620 static ir_node *call_expression_to_firm(const call_expression_t *call)
1622 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1623 assert(get_cur_block() != NULL);
1625 expression_t *function = call->function;
1626 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1627 return process_builtin_call(call);
1629 if (function->kind == EXPR_REFERENCE) {
1630 const reference_expression_t *ref = &function->reference;
1631 declaration_t *declaration = ref->declaration;
1633 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1634 if (declaration->v.entity == rts_entities[rts_alloca]) {
1635 /* handle alloca() call */
1636 expression_t *argument = call->arguments->expression;
1637 ir_node *size = expression_to_firm(argument);
1639 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1641 ir_node *store = get_store();
1642 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1643 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1645 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1647 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1653 ir_node *callee = expression_to_firm(function);
1655 type_t *type = skip_typeref(function->base.type);
1656 assert(is_type_pointer(type));
1657 pointer_type_t *pointer_type = &type->pointer;
1658 type_t *points_to = skip_typeref(pointer_type->points_to);
1659 assert(is_type_function(points_to));
1660 function_type_t *function_type = &points_to->function;
1662 int n_parameters = 0;
1663 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1664 ir_type *new_method_type = NULL;
1665 if (function_type->variadic || function_type->unspecified_parameters) {
1666 const call_argument_t *argument = call->arguments;
1667 for( ; argument != NULL; argument = argument->next) {
1671 /* we need to construct a new method type matching the call
1673 int n_res = get_method_n_ress(ir_method_type);
1674 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1675 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1676 n_parameters, n_res, dbgi);
1677 set_method_calling_convention(new_method_type,
1678 get_method_calling_convention(ir_method_type));
1679 set_method_additional_properties(new_method_type,
1680 get_method_additional_properties(ir_method_type));
1681 set_method_variadicity(new_method_type,
1682 get_method_variadicity(ir_method_type));
1684 for(int i = 0; i < n_res; ++i) {
1685 set_method_res_type(new_method_type, i,
1686 get_method_res_type(ir_method_type, i));
1688 argument = call->arguments;
1689 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1690 expression_t *expression = argument->expression;
1691 ir_type *irtype = get_ir_type(expression->base.type);
1692 set_method_param_type(new_method_type, i, irtype);
1694 ir_method_type = new_method_type;
1696 n_parameters = get_method_n_params(ir_method_type);
1699 ir_node *in[n_parameters];
1701 const call_argument_t *argument = call->arguments;
1702 for(int n = 0; n < n_parameters; ++n) {
1703 expression_t *expression = argument->expression;
1704 ir_node *arg_node = expression_to_firm(expression);
1706 arg_node = do_strict_conv(dbgi, arg_node);
1710 argument = argument->next;
1713 ir_node *store = get_store();
1714 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1716 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1719 type_t *return_type = skip_typeref(function_type->return_type);
1720 ir_node *result = NULL;
1722 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1724 if (is_type_scalar(return_type)) {
1725 mode = get_ir_mode(return_type);
1729 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1730 result = new_d_Proj(dbgi, resproj, mode, 0);
1733 if (function->kind == EXPR_REFERENCE &&
1734 function->reference.declaration->modifiers & DM_NORETURN) {
1735 /* A dead end: Keep the Call and the Block. Also place all further
1736 * nodes into a new and unreachable block. */
1738 keep_alive(get_cur_block());
1745 static void statement_to_firm(statement_t *statement);
1746 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1748 static ir_node *expression_to_addr(const expression_t *expression);
1749 static ir_node *create_condition_evaluation(const expression_t *expression,
1750 ir_node *true_block,
1751 ir_node *false_block);
1753 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1756 value = do_strict_conv(dbgi, value);
1758 ir_node *memory = get_store();
1760 if (is_type_scalar(type)) {
1761 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1762 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1763 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1764 set_Store_volatility(store, volatility_is_volatile);
1765 set_store(store_mem);
1767 ir_type *irtype = get_ir_type(type);
1768 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1769 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1770 set_store(copyb_mem);
1774 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1776 tarval *all_one = get_mode_all_one(mode);
1777 int mode_size = get_mode_size_bits(mode);
1779 assert(offset >= 0);
1781 assert(offset + size <= mode_size);
1782 if (size == mode_size) {
1786 long shiftr = get_mode_size_bits(mode) - size;
1787 long shiftl = offset;
1788 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1789 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1790 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1791 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1796 static void bitfield_store_to_firm(dbg_info *dbgi,
1797 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1799 ir_type *entity_type = get_entity_type(entity);
1800 ir_type *base_type = get_primitive_base_type(entity_type);
1801 assert(base_type != NULL);
1802 ir_mode *mode = get_type_mode(base_type);
1804 value = create_conv(dbgi, value, mode);
1806 /* kill upper bits of value and shift to right position */
1807 int bitoffset = get_entity_offset_bits_remainder(entity);
1808 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1810 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1811 ir_node *mask_node = new_d_Const(dbgi, mode, mask);
1812 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1813 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1814 ir_node *shiftcount = new_d_Const(dbgi, mode_uint, shiftl);
1815 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1817 /* load current value */
1818 ir_node *mem = get_store();
1819 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1820 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1821 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1822 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1823 tarval *inv_mask = tarval_not(shift_mask);
1824 ir_node *inv_mask_node = new_d_Const(dbgi, mode, inv_mask);
1825 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1827 /* construct new value and store */
1828 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1829 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1830 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1831 set_store(store_mem);
1834 set_Load_volatility(load, volatility_is_volatile);
1835 set_Store_volatility(store, volatility_is_volatile);
1839 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1842 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1843 type_t *type = expression->base.type;
1844 ir_mode *mode = get_ir_mode(type);
1845 ir_node *mem = get_store();
1846 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1847 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1848 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1850 load_res = create_conv(dbgi, load_res, mode_int);
1852 set_store(load_mem);
1854 /* kill upper bits */
1855 ir_entity *entity = expression->compound_entry->v.entity;
1856 int bitoffset = get_entity_offset_bits_remainder(entity);
1857 ir_type *entity_type = get_entity_type(entity);
1858 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1859 long shift_bitsl = machine_size - bitoffset - bitsize;
1860 assert(shift_bitsl >= 0);
1861 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1862 ir_node *countl = new_d_Const(dbgi, mode_uint, tvl);
1863 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1865 long shift_bitsr = bitoffset + shift_bitsl;
1866 assert(shift_bitsr <= (long) machine_size);
1867 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1868 ir_node *countr = new_d_Const(dbgi, mode_uint, tvr);
1870 if (mode_is_signed(mode)) {
1871 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1873 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1876 return create_conv(dbgi, shiftr, mode);
1879 static void set_value_for_expression_addr(const expression_t *expression,
1880 ir_node *value, ir_node *addr)
1882 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1883 value = do_strict_conv(dbgi, value);
1885 if (expression->kind == EXPR_REFERENCE) {
1886 const reference_expression_t *ref = &expression->reference;
1888 declaration_t *declaration = ref->declaration;
1889 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1890 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1891 set_value(declaration->v.value_number, value);
1897 addr = expression_to_addr(expression);
1899 type_t *type = skip_typeref(expression->base.type);
1901 if (expression->kind == EXPR_SELECT) {
1902 const select_expression_t *select = &expression->select;
1904 declaration_t *declaration = select->compound_entry;
1905 if (declaration->type->kind == TYPE_BITFIELD) {
1906 ir_entity *entity = select->compound_entry->v.entity;
1908 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1909 bitfield_store_to_firm(dbgi, entity, addr, value, set_volatile);
1914 assign_value(dbgi, addr, type, value);
1917 static void set_value_for_expression(const expression_t *expression,
1920 set_value_for_expression_addr(expression, value, NULL);
1923 static ir_node *get_value_from_lvalue(const expression_t *expression,
1926 if (expression->kind == EXPR_REFERENCE) {
1927 const reference_expression_t *ref = &expression->reference;
1929 declaration_t *declaration = ref->declaration;
1930 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1931 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1932 assert(addr == NULL);
1933 ir_mode *mode = get_ir_mode(expression->base.type);
1934 return get_value(declaration->v.value_number, mode);
1938 assert(addr != NULL);
1939 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1942 if (expression->kind == EXPR_SELECT &&
1943 expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1944 value = bitfield_extract_to_firm(&expression->select, addr);
1946 value = deref_address(dbgi, expression->base.type, addr);
1953 static ir_node *create_incdec(const unary_expression_t *expression)
1955 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1956 const expression_t *value_expr = expression->value;
1957 ir_node *addr = expression_to_addr(value_expr);
1958 ir_node *value = get_value_from_lvalue(value_expr, addr);
1960 type_t *type = skip_typeref(expression->base.type);
1961 ir_mode *mode = get_ir_mode(expression->base.type);
1964 if (is_type_pointer(type)) {
1965 pointer_type_t *pointer_type = &type->pointer;
1966 offset = get_type_size(pointer_type->points_to);
1968 assert(is_type_arithmetic(type));
1969 offset = new_Const(mode, get_mode_one(mode));
1973 ir_node *store_value;
1974 switch(expression->base.kind) {
1975 case EXPR_UNARY_POSTFIX_INCREMENT:
1977 store_value = new_d_Add(dbgi, value, offset, mode);
1979 case EXPR_UNARY_POSTFIX_DECREMENT:
1981 store_value = new_d_Sub(dbgi, value, offset, mode);
1983 case EXPR_UNARY_PREFIX_INCREMENT:
1984 result = new_d_Add(dbgi, value, offset, mode);
1985 store_value = result;
1987 case EXPR_UNARY_PREFIX_DECREMENT:
1988 result = new_d_Sub(dbgi, value, offset, mode);
1989 store_value = result;
1992 panic("no incdec expr in create_incdec");
1995 set_value_for_expression_addr(value_expr, store_value, addr);
2000 static bool is_local_variable(expression_t *expression)
2002 if (expression->kind != EXPR_REFERENCE)
2004 reference_expression_t *ref_expr = &expression->reference;
2005 declaration_t *declaration = ref_expr->declaration;
2006 return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
2009 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2012 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2013 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2014 case EXPR_BINARY_NOTEQUAL:
2015 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2016 case EXPR_BINARY_ISLESS:
2017 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2018 case EXPR_BINARY_ISLESSEQUAL:
2019 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2020 case EXPR_BINARY_ISGREATER:
2021 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2022 case EXPR_BINARY_ISGREATEREQUAL:
2023 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2024 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2029 panic("trying to get pn_Cmp from non-comparison binexpr type");
2033 * Handle the assume optimizer hint: check if a Confirm
2034 * node can be created.
2036 * @param dbi debug info
2037 * @param expr the IL assume expression
2039 * we support here only some simple cases:
2044 static ir_node *handle_assume_compare(dbg_info *dbi,
2045 const binary_expression_t *expression)
2047 expression_t *op1 = expression->left;
2048 expression_t *op2 = expression->right;
2049 declaration_t *var2, *var = NULL;
2050 ir_node *res = NULL;
2053 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2055 if (is_local_variable(op1) && is_local_variable(op2)) {
2056 var = op1->reference.declaration;
2057 var2 = op2->reference.declaration;
2059 type_t *const type = skip_typeref(var->type);
2060 ir_mode *const mode = get_ir_mode(type);
2062 ir_node *const irn1 = get_value(var->v.value_number, mode);
2063 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2065 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2066 set_value(var2->v.value_number, res);
2068 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2069 set_value(var->v.value_number, res);
2075 if (is_local_variable(op1) && is_constant_expression(op2)) {
2076 var = op1->reference.declaration;
2078 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2079 cmp_val = get_inversed_pnc(cmp_val);
2080 var = op2->reference.declaration;
2085 type_t *const type = skip_typeref(var->type);
2086 ir_mode *const mode = get_ir_mode(type);
2088 res = get_value(var->v.value_number, mode);
2089 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2090 set_value(var->v.value_number, res);
2096 * Handle the assume optimizer hint.
2098 * @param dbi debug info
2099 * @param expr the IL assume expression
2101 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2102 switch(expression->kind) {
2103 case EXPR_BINARY_EQUAL:
2104 case EXPR_BINARY_NOTEQUAL:
2105 case EXPR_BINARY_LESS:
2106 case EXPR_BINARY_LESSEQUAL:
2107 case EXPR_BINARY_GREATER:
2108 case EXPR_BINARY_GREATEREQUAL:
2109 return handle_assume_compare(dbi, &expression->binary);
2115 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2117 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2118 type_t *type = skip_typeref(expression->base.type);
2120 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2121 return expression_to_addr(expression->value);
2123 const expression_t *value = expression->value;
2125 switch(expression->base.kind) {
2126 case EXPR_UNARY_NEGATE: {
2127 ir_node *value_node = expression_to_firm(value);
2128 ir_mode *mode = get_ir_mode(type);
2129 return new_d_Minus(dbgi, value_node, mode);
2131 case EXPR_UNARY_PLUS:
2132 return expression_to_firm(value);
2133 case EXPR_UNARY_BITWISE_NEGATE: {
2134 ir_node *value_node = expression_to_firm(value);
2135 ir_mode *mode = get_ir_mode(type);
2136 return new_d_Not(dbgi, value_node, mode);
2138 case EXPR_UNARY_NOT: {
2139 ir_node *value_node = _expression_to_firm(value);
2140 value_node = create_conv(dbgi, value_node, mode_b);
2141 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2144 case EXPR_UNARY_DEREFERENCE: {
2145 ir_node *value_node = expression_to_firm(value);
2146 type_t *value_type = skip_typeref(value->base.type);
2147 assert(is_type_pointer(value_type));
2148 type_t *points_to = value_type->pointer.points_to;
2149 return deref_address(dbgi, points_to, value_node);
2151 case EXPR_UNARY_POSTFIX_INCREMENT:
2152 case EXPR_UNARY_POSTFIX_DECREMENT:
2153 case EXPR_UNARY_PREFIX_INCREMENT:
2154 case EXPR_UNARY_PREFIX_DECREMENT:
2155 return create_incdec(expression);
2156 case EXPR_UNARY_CAST: {
2157 ir_node *value_node = expression_to_firm(value);
2158 if (is_type_scalar(type)) {
2159 ir_mode *mode = get_ir_mode(type);
2160 ir_node *node = create_conv(dbgi, value_node, mode);
2161 node = do_strict_conv(dbgi, node);
2164 /* make sure firm type is constructed */
2165 (void) get_ir_type(type);
2169 case EXPR_UNARY_CAST_IMPLICIT: {
2170 ir_node *value_node = expression_to_firm(value);
2171 if (is_type_scalar(type)) {
2172 ir_mode *mode = get_ir_mode(type);
2173 return create_conv(dbgi, value_node, mode);
2178 case EXPR_UNARY_ASSUME:
2179 if (firm_opt.confirm)
2180 return handle_assume(dbgi, value);
2187 panic("invalid UNEXPR type found");
2191 * produces a 0/1 depending of the value of a mode_b node
2193 static ir_node *produce_condition_result(const expression_t *expression,
2196 ir_mode *mode = get_ir_mode(expression->base.type);
2197 ir_node *cur_block = get_cur_block();
2199 ir_node *one_block = new_immBlock();
2200 ir_node *one = new_Const(mode, get_mode_one(mode));
2201 ir_node *jmp_one = new_d_Jmp(dbgi);
2203 ir_node *zero_block = new_immBlock();
2204 ir_node *zero = new_Const(mode, get_mode_null(mode));
2205 ir_node *jmp_zero = new_d_Jmp(dbgi);
2207 set_cur_block(cur_block);
2208 create_condition_evaluation(expression, one_block, zero_block);
2209 mature_immBlock(one_block);
2210 mature_immBlock(zero_block);
2212 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2213 new_Block(2, in_cf);
2215 ir_node *in[2] = { one, zero };
2216 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2221 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2222 ir_node *value, type_t *type)
2224 pointer_type_t *const pointer_type = &type->pointer;
2225 type_t *const points_to = skip_typeref(pointer_type->points_to);
2226 unsigned elem_size = get_type_size_const(points_to);
2228 /* gcc extension: allow arithmetic with void * and function * */
2229 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2230 is_type_function(points_to)) {
2234 assert(elem_size >= 1);
2238 value = create_conv(dbgi, value, mode_int);
2239 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2240 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode_int);
2244 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2245 ir_node *left, ir_node *right)
2248 type_t *type_left = skip_typeref(expression->left->base.type);
2249 type_t *type_right = skip_typeref(expression->right->base.type);
2251 expression_kind_t kind = expression->base.kind;
2254 case EXPR_BINARY_SHIFTLEFT:
2255 case EXPR_BINARY_SHIFTRIGHT:
2256 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2257 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2258 mode = get_irn_mode(left);
2259 right = create_conv(dbgi, right, mode_uint);
2262 case EXPR_BINARY_SUB:
2263 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2264 const pointer_type_t *const ptr_type = &type_left->pointer;
2266 mode = get_ir_mode(expression->base.type);
2267 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2268 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2269 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2270 ir_node *const no_mem = new_NoMem();
2271 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2272 mode, op_pin_state_floats);
2273 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2276 case EXPR_BINARY_SUB_ASSIGN:
2277 if (is_type_pointer(type_left)) {
2278 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2279 mode = get_ir_mode(type_left);
2284 case EXPR_BINARY_ADD:
2285 case EXPR_BINARY_ADD_ASSIGN:
2286 if (is_type_pointer(type_left)) {
2287 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2288 mode = get_ir_mode(type_left);
2290 } else if (is_type_pointer(type_right)) {
2291 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2292 mode = get_ir_mode(type_right);
2299 mode = get_irn_mode(right);
2300 left = create_conv(dbgi, left, mode);
2305 case EXPR_BINARY_ADD_ASSIGN:
2306 case EXPR_BINARY_ADD:
2307 return new_d_Add(dbgi, left, right, mode);
2308 case EXPR_BINARY_SUB_ASSIGN:
2309 case EXPR_BINARY_SUB:
2310 return new_d_Sub(dbgi, left, right, mode);
2311 case EXPR_BINARY_MUL_ASSIGN:
2312 case EXPR_BINARY_MUL:
2313 return new_d_Mul(dbgi, left, right, mode);
2314 case EXPR_BINARY_BITWISE_AND:
2315 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2316 return new_d_And(dbgi, left, right, mode);
2317 case EXPR_BINARY_BITWISE_OR:
2318 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2319 return new_d_Or(dbgi, left, right, mode);
2320 case EXPR_BINARY_BITWISE_XOR:
2321 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2322 return new_d_Eor(dbgi, left, right, mode);
2323 case EXPR_BINARY_SHIFTLEFT:
2324 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2325 return new_d_Shl(dbgi, left, right, mode);
2326 case EXPR_BINARY_SHIFTRIGHT:
2327 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2328 if (mode_is_signed(mode)) {
2329 return new_d_Shrs(dbgi, left, right, mode);
2331 return new_d_Shr(dbgi, left, right, mode);
2333 case EXPR_BINARY_DIV:
2334 case EXPR_BINARY_DIV_ASSIGN: {
2335 ir_node *pin = new_Pin(new_NoMem());
2338 if (mode_is_float(mode)) {
2339 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2340 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2342 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2343 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2347 case EXPR_BINARY_MOD:
2348 case EXPR_BINARY_MOD_ASSIGN: {
2349 ir_node *pin = new_Pin(new_NoMem());
2350 assert(!mode_is_float(mode));
2351 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2352 op_pin_state_floats);
2353 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2357 panic("unexpected expression kind");
2361 static ir_node *create_lazy_op(const binary_expression_t *expression)
2363 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2364 type_t *type = expression->base.type;
2365 ir_mode *mode = get_ir_mode(type);
2367 if (is_constant_expression(expression->left)) {
2368 long val = fold_constant(expression->left);
2369 expression_kind_t ekind = expression->base.kind;
2370 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2371 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2372 (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2373 return expression_to_firm(expression->right);
2375 return new_Const(mode, get_mode_one(mode));
2379 return produce_condition_result((const expression_t*) expression, dbgi);
2382 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2383 ir_node *right, ir_mode *mode);
2385 static ir_node *create_assign_binop(const binary_expression_t *expression)
2387 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2388 const expression_t *left_expr = expression->left;
2389 ir_mode *left_mode = get_ir_mode(left_expr->base.type);
2390 ir_node *right = expression_to_firm(expression->right);
2391 ir_node *left_addr = expression_to_addr(left_expr);
2392 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2393 ir_node *result = create_op(dbgi, expression, left, right);
2395 result = create_conv(dbgi, result, left_mode);
2396 result = do_strict_conv(dbgi, result);
2398 set_value_for_expression_addr(left_expr, result, left_addr);
2403 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2405 expression_kind_t kind = expression->base.kind;
2408 case EXPR_BINARY_EQUAL:
2409 case EXPR_BINARY_NOTEQUAL:
2410 case EXPR_BINARY_LESS:
2411 case EXPR_BINARY_LESSEQUAL:
2412 case EXPR_BINARY_GREATER:
2413 case EXPR_BINARY_GREATEREQUAL:
2414 case EXPR_BINARY_ISGREATER:
2415 case EXPR_BINARY_ISGREATEREQUAL:
2416 case EXPR_BINARY_ISLESS:
2417 case EXPR_BINARY_ISLESSEQUAL:
2418 case EXPR_BINARY_ISLESSGREATER:
2419 case EXPR_BINARY_ISUNORDERED: {
2420 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2421 ir_node *left = expression_to_firm(expression->left);
2422 ir_node *right = expression_to_firm(expression->right);
2423 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2424 long pnc = get_pnc(kind, expression->left->base.type);
2425 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2428 case EXPR_BINARY_ASSIGN: {
2429 ir_node *addr = expression_to_addr(expression->left);
2430 ir_node *right = expression_to_firm(expression->right);
2431 set_value_for_expression_addr(expression->left, right, addr);
2435 case EXPR_BINARY_ADD:
2436 case EXPR_BINARY_SUB:
2437 case EXPR_BINARY_MUL:
2438 case EXPR_BINARY_DIV:
2439 case EXPR_BINARY_MOD:
2440 case EXPR_BINARY_BITWISE_AND:
2441 case EXPR_BINARY_BITWISE_OR:
2442 case EXPR_BINARY_BITWISE_XOR:
2443 case EXPR_BINARY_SHIFTLEFT:
2444 case EXPR_BINARY_SHIFTRIGHT:
2446 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2447 ir_node *left = expression_to_firm(expression->left);
2448 ir_node *right = expression_to_firm(expression->right);
2449 return create_op(dbgi, expression, left, right);
2451 case EXPR_BINARY_LOGICAL_AND:
2452 case EXPR_BINARY_LOGICAL_OR:
2453 return create_lazy_op(expression);
2454 case EXPR_BINARY_COMMA:
2455 /* create side effects of left side */
2456 (void) expression_to_firm(expression->left);
2457 return _expression_to_firm(expression->right);
2459 case EXPR_BINARY_ADD_ASSIGN:
2460 case EXPR_BINARY_SUB_ASSIGN:
2461 case EXPR_BINARY_MUL_ASSIGN:
2462 case EXPR_BINARY_MOD_ASSIGN:
2463 case EXPR_BINARY_DIV_ASSIGN:
2464 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2465 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2466 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2467 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2468 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2469 return create_assign_binop(expression);
2470 case EXPR_BINARY_BUILTIN_EXPECT:
2471 return _expression_to_firm(expression->left);
2473 panic("TODO binexpr type");
2477 static ir_node *array_access_addr(const array_access_expression_t *expression)
2479 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2480 ir_node *base_addr = expression_to_firm(expression->array_ref);
2481 ir_node *offset = expression_to_firm(expression->index);
2483 type_t *offset_type = skip_typeref(expression->index->base.type);
2485 if (is_type_signed(offset_type)) {
2486 mode = get_ir_mode(type_ssize_t);
2488 mode = get_ir_mode(type_size_t);
2490 offset = create_conv(dbgi, offset, mode);
2492 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2493 assert(is_type_pointer(ref_type));
2494 pointer_type_t *pointer_type = &ref_type->pointer;
2496 ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2497 elem_size_const = create_conv(dbgi, elem_size_const, mode);
2498 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
2500 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2505 static ir_node *array_access_to_firm(
2506 const array_access_expression_t *expression)
2508 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2509 ir_node *addr = array_access_addr(expression);
2510 type_t *type = revert_automatic_type_conversion(
2511 (const expression_t*) expression);
2512 type = skip_typeref(type);
2514 return deref_address(dbgi, type, addr);
2517 static long get_offsetof_offset(const offsetof_expression_t *expression)
2519 type_t *orig_type = expression->type;
2522 designator_t *designator = expression->designator;
2523 for( ; designator != NULL; designator = designator->next) {
2524 type_t *type = skip_typeref(orig_type);
2525 /* be sure the type is constructed */
2526 (void) get_ir_type(type);
2528 if (designator->symbol != NULL) {
2529 assert(is_type_compound(type));
2530 symbol_t *symbol = designator->symbol;
2532 declaration_t *declaration = type->compound.declaration;
2533 declaration_t *iter = declaration->scope.declarations;
2534 for( ; iter != NULL; iter = iter->next) {
2535 if (iter->symbol == symbol) {
2539 assert(iter != NULL);
2541 assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2542 offset += get_entity_offset(iter->v.entity);
2544 orig_type = iter->type;
2546 expression_t *array_index = designator->array_index;
2547 assert(designator->array_index != NULL);
2548 assert(is_type_array(type));
2550 long index = fold_constant(array_index);
2551 ir_type *arr_type = get_ir_type(type);
2552 ir_type *elem_type = get_array_element_type(arr_type);
2553 long elem_size = get_type_size_bytes(elem_type);
2555 offset += index * elem_size;
2557 orig_type = type->array.element_type;
2564 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2566 ir_mode *mode = get_ir_mode(expression->base.type);
2567 long offset = get_offsetof_offset(expression);
2568 tarval *tv = new_tarval_from_long(offset, mode);
2569 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2571 return new_d_Const(dbgi, mode, tv);
2574 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2575 ir_entity *entity, type_t *type);
2577 static ir_node *compound_literal_to_firm(
2578 const compound_literal_expression_t *expression)
2580 type_t *type = expression->type;
2582 /* create an entity on the stack */
2583 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2585 ident *const id = id_unique("CompLit.%u");
2586 ir_type *const irtype = get_ir_type(type);
2587 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2588 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2589 set_entity_ld_ident(entity, id);
2591 set_entity_variability(entity, variability_uninitialized);
2593 /* create initialisation code */
2594 initializer_t *initializer = expression->initializer;
2595 create_local_initializer(initializer, dbgi, entity, type);
2597 /* create a sel for the compound literal address */
2598 ir_node *frame = get_local_frame(entity);
2599 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2604 * Transform a sizeof expression into Firm code.
2606 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2608 type_t *type = expression->type;
2610 type = expression->tp_expression->base.type;
2611 assert(type != NULL);
2614 type = skip_typeref(type);
2615 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2616 if (is_type_array(type) && type->array.is_vla
2617 && expression->tp_expression != NULL) {
2618 expression_to_firm(expression->tp_expression);
2621 return get_type_size(type);
2625 * Transform an alignof expression into Firm code.
2627 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2629 type_t *type = expression->type;
2631 /* beware: if expression is a variable reference, return the
2632 alignment of the variable. */
2633 const expression_t *tp_expression = expression->tp_expression;
2634 const declaration_t *declaration = expr_is_variable(tp_expression);
2635 if (declaration != NULL) {
2636 /* TODO: get the alignment of this variable. */
2638 type = tp_expression->base.type;
2639 assert(type != NULL);
2642 ir_mode *const mode = get_ir_mode(expression->base.type);
2643 symconst_symbol sym;
2644 sym.type_p = get_ir_type(type);
2645 return new_SymConst(mode, sym, symconst_type_align);
2648 static void init_ir_types(void);
2650 long fold_constant(const expression_t *expression)
2652 assert(is_type_valid(skip_typeref(expression->base.type)));
2654 bool constant_folding_old = constant_folding;
2655 constant_folding = true;
2659 assert(is_constant_expression(expression));
2661 ir_graph *old_current_ir_graph = current_ir_graph;
2662 if (current_ir_graph == NULL) {
2663 current_ir_graph = get_const_code_irg();
2666 ir_node *cnst = expression_to_firm(expression);
2667 current_ir_graph = old_current_ir_graph;
2669 if (!is_Const(cnst)) {
2670 panic("couldn't fold constant\n");
2673 tarval *tv = get_Const_tarval(cnst);
2674 if (!tarval_is_long(tv)) {
2675 panic("result of constant folding is not integer\n");
2678 constant_folding = constant_folding_old;
2680 return get_tarval_long(tv);
2683 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2685 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2687 /* first try to fold a constant condition */
2688 if (is_constant_expression(expression->condition)) {
2689 long val = fold_constant(expression->condition);
2691 expression_t *true_expression = expression->true_expression;
2692 if (true_expression == NULL)
2693 true_expression = expression->condition;
2694 return expression_to_firm(true_expression);
2696 return expression_to_firm(expression->false_expression);
2700 ir_node *cur_block = get_cur_block();
2702 /* create the true block */
2703 ir_node *true_block = new_immBlock();
2705 ir_node *true_val = expression->true_expression != NULL ?
2706 expression_to_firm(expression->true_expression) : NULL;
2707 ir_node *true_jmp = new_Jmp();
2709 /* create the false block */
2710 ir_node *false_block = new_immBlock();
2712 ir_node *false_val = expression_to_firm(expression->false_expression);
2713 ir_node *false_jmp = new_Jmp();
2715 /* create the condition evaluation */
2716 set_cur_block(cur_block);
2717 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2718 if (expression->true_expression == NULL) {
2719 if (cond_expr != NULL) {
2720 true_val = cond_expr;
2722 /* Condition ended with a short circuit (&&, ||, !) operation.
2723 * Generate a "1" as value for the true branch. */
2724 ir_mode *const mode = mode_Is;
2725 true_val = new_Const(mode, get_mode_one(mode));
2728 mature_immBlock(true_block);
2729 mature_immBlock(false_block);
2731 /* create the common block */
2732 ir_node *in_cf[2] = { true_jmp, false_jmp };
2733 new_Block(2, in_cf);
2735 /* TODO improve static semantics, so either both or no values are NULL */
2736 if (true_val == NULL || false_val == NULL)
2739 ir_node *in[2] = { true_val, false_val };
2740 ir_mode *mode = get_irn_mode(true_val);
2741 assert(get_irn_mode(false_val) == mode);
2742 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2748 * Returns an IR-node representing the address of a field.
2750 static ir_node *select_addr(const select_expression_t *expression)
2752 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2754 ir_node *compound_addr = expression_to_firm(expression->compound);
2756 /* make sure the type is constructed */
2757 type_t *type = skip_typeref(expression->compound->base.type);
2758 if (is_type_pointer(type)) {
2759 type = type->pointer.points_to;
2761 (void) get_ir_type(type);
2763 declaration_t *entry = expression->compound_entry;
2764 assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2765 ir_entity *entity = entry->v.entity;
2767 assert(entity != NULL);
2769 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2774 static ir_node *select_to_firm(const select_expression_t *expression)
2776 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2777 ir_node *addr = select_addr(expression);
2778 type_t *type = revert_automatic_type_conversion(
2779 (const expression_t*) expression);
2780 type = skip_typeref(type);
2782 declaration_t *entry = expression->compound_entry;
2783 type_t *entry_type = skip_typeref(entry->type);
2785 if (entry_type->kind == TYPE_BITFIELD) {
2786 return bitfield_extract_to_firm(expression, addr);
2789 return deref_address(dbgi, type, addr);
2792 /* Values returned by __builtin_classify_type. */
2793 typedef enum gcc_type_class
2799 enumeral_type_class,
2802 reference_type_class,
2806 function_type_class,
2817 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2819 const type_t *const type = skip_typeref(expr->type_expression->base.type);
2825 const atomic_type_t *const atomic_type = &type->atomic;
2826 switch (atomic_type->akind) {
2827 /* should not be reached */
2828 case ATOMIC_TYPE_INVALID:
2832 /* gcc cannot do that */
2833 case ATOMIC_TYPE_VOID:
2834 tc = void_type_class;
2837 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2838 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2839 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2840 case ATOMIC_TYPE_SHORT:
2841 case ATOMIC_TYPE_USHORT:
2842 case ATOMIC_TYPE_INT:
2843 case ATOMIC_TYPE_UINT:
2844 case ATOMIC_TYPE_LONG:
2845 case ATOMIC_TYPE_ULONG:
2846 case ATOMIC_TYPE_LONGLONG:
2847 case ATOMIC_TYPE_ULONGLONG:
2848 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2849 tc = integer_type_class;
2852 case ATOMIC_TYPE_FLOAT:
2853 case ATOMIC_TYPE_DOUBLE:
2854 case ATOMIC_TYPE_LONG_DOUBLE:
2855 tc = real_type_class;
2858 panic("Unexpected atomic type in classify_type_to_firm().");
2861 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2862 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2863 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2864 case TYPE_ARRAY: /* gcc handles this as pointer */
2865 case TYPE_FUNCTION: /* gcc handles this as pointer */
2866 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2867 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2868 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2870 /* gcc handles this as integer */
2871 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2874 /* typedef/typeof should be skipped already */
2881 panic("unexpected TYPE classify_type_to_firm().");
2884 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2885 ir_mode *const mode = mode_int;
2886 tarval *const tv = new_tarval_from_long(tc, mode);
2887 return new_d_Const(dbgi, mode, tv);
2890 static ir_node *function_name_to_firm(
2891 const funcname_expression_t *const expr)
2893 switch(expr->kind) {
2894 case FUNCNAME_FUNCTION:
2895 case FUNCNAME_PRETTY_FUNCTION:
2896 case FUNCNAME_FUNCDNAME:
2897 if (current_function_name == NULL) {
2898 const source_position_t *const src_pos = &expr->base.source_position;
2899 const char *const name = current_function_decl->symbol->string;
2900 const string_t string = { name, strlen(name) + 1 };
2901 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2903 return current_function_name;
2904 case FUNCNAME_FUNCSIG:
2905 if (current_funcsig == NULL) {
2906 const source_position_t *const src_pos = &expr->base.source_position;
2907 ir_entity *ent = get_irg_entity(current_ir_graph);
2908 const char *const name = get_entity_ld_name(ent);
2909 const string_t string = { name, strlen(name) + 1 };
2910 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2912 return current_funcsig;
2914 panic("Unsupported function name");
2917 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2919 statement_t *statement = expr->statement;
2921 assert(statement->kind == STATEMENT_COMPOUND);
2922 return compound_statement_to_firm(&statement->compound);
2925 static ir_node *va_start_expression_to_firm(
2926 const va_start_expression_t *const expr)
2928 ir_type *const method_type = get_ir_type(current_function_decl->type);
2929 int const n = get_method_n_params(method_type) - 1;
2930 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2931 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2932 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2933 ir_node *const no_mem = new_NoMem();
2934 ir_node *const arg_sel =
2935 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2937 ir_node *const cnst = get_type_size(expr->parameter->type);
2938 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2939 set_value_for_expression(expr->ap, add);
2944 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2946 type_t *const type = expr->base.type;
2947 expression_t *const ap_expr = expr->ap;
2948 ir_node *const ap_addr = expression_to_addr(ap_expr);
2949 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
2950 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2951 ir_node *const res = deref_address(dbgi, type, ap);
2953 ir_node *const cnst = get_type_size(expr->base.type);
2954 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2956 set_value_for_expression_addr(ap_expr, add, ap_addr);
2961 static ir_node *dereference_addr(const unary_expression_t *const expression)
2963 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2964 return expression_to_firm(expression->value);
2968 * Returns a IR-node representing an lvalue of the given expression.
2970 static ir_node *expression_to_addr(const expression_t *expression)
2972 switch(expression->kind) {
2973 case EXPR_REFERENCE:
2974 return reference_addr(&expression->reference);
2975 case EXPR_ARRAY_ACCESS:
2976 return array_access_addr(&expression->array_access);
2978 return select_addr(&expression->select);
2980 return call_expression_to_firm(&expression->call);
2981 case EXPR_UNARY_DEREFERENCE: {
2982 return dereference_addr(&expression->unary);
2987 panic("trying to get address of non-lvalue");
2990 static ir_node *builtin_constant_to_firm(
2991 const builtin_constant_expression_t *expression)
2993 ir_mode *mode = get_ir_mode(expression->base.type);
2996 if (is_constant_expression(expression->value)) {
3001 return new_Const_long(mode, v);
3004 static ir_node *builtin_prefetch_to_firm(
3005 const builtin_prefetch_expression_t *expression)
3007 ir_node *adr = expression_to_firm(expression->adr);
3008 /* no Firm support for prefetch yet */
3013 static ir_node *get_label_block(declaration_t *label)
3015 assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
3017 if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3018 return label->v.block;
3020 assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3022 /* beware: might be called from create initializer with current_ir_graph
3023 * set to const_code_irg. */
3024 ir_graph *rem = current_ir_graph;
3025 current_ir_graph = current_function;
3027 ir_node *old_cur_block = get_cur_block();
3028 ir_node *block = new_immBlock();
3029 set_cur_block(old_cur_block);
3031 label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3032 label->v.block = block;
3034 ARR_APP1(declaration_t *, all_labels, label);
3036 current_ir_graph = rem;
3041 * Pointer to a label. This is used for the
3042 * GNU address-of-label extension.
3044 static ir_node *label_address_to_firm(
3045 const label_address_expression_t *label)
3047 ir_node *block = get_label_block(label->declaration);
3048 ir_label_t nr = get_Block_label(block);
3051 nr = get_irp_next_label_nr();
3052 set_Block_label(block, nr);
3054 symconst_symbol value;
3056 return new_SymConst(mode_P_code, value, symconst_label);
3060 * creates firm nodes for an expression. The difference between this function
3061 * and expression_to_firm is, that this version might produce mode_b nodes
3062 * instead of mode_Is.
3064 static ir_node *_expression_to_firm(const expression_t *expression)
3067 if (!constant_folding) {
3068 assert(!expression->base.transformed);
3069 ((expression_t*) expression)->base.transformed = true;
3073 switch (expression->kind) {
3074 case EXPR_CHARACTER_CONSTANT:
3075 return character_constant_to_firm(&expression->conste);
3076 case EXPR_WIDE_CHARACTER_CONSTANT:
3077 return wide_character_constant_to_firm(&expression->conste);
3079 return const_to_firm(&expression->conste);
3080 case EXPR_STRING_LITERAL:
3081 return string_literal_to_firm(&expression->string);
3082 case EXPR_WIDE_STRING_LITERAL:
3083 return wide_string_literal_to_firm(&expression->wide_string);
3084 case EXPR_REFERENCE:
3085 return reference_expression_to_firm(&expression->reference);
3087 return call_expression_to_firm(&expression->call);
3089 return unary_expression_to_firm(&expression->unary);
3091 return binary_expression_to_firm(&expression->binary);
3092 case EXPR_ARRAY_ACCESS:
3093 return array_access_to_firm(&expression->array_access);
3095 return sizeof_to_firm(&expression->typeprop);
3097 return alignof_to_firm(&expression->typeprop);
3098 case EXPR_CONDITIONAL:
3099 return conditional_to_firm(&expression->conditional);
3101 return select_to_firm(&expression->select);
3102 case EXPR_CLASSIFY_TYPE:
3103 return classify_type_to_firm(&expression->classify_type);
3105 return function_name_to_firm(&expression->funcname);
3106 case EXPR_STATEMENT:
3107 return statement_expression_to_firm(&expression->statement);
3109 return va_start_expression_to_firm(&expression->va_starte);
3111 return va_arg_expression_to_firm(&expression->va_arge);
3112 case EXPR_BUILTIN_SYMBOL:
3113 panic("unimplemented expression found");
3114 case EXPR_BUILTIN_CONSTANT_P:
3115 return builtin_constant_to_firm(&expression->builtin_constant);
3116 case EXPR_BUILTIN_PREFETCH:
3117 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3119 return offsetof_to_firm(&expression->offsetofe);
3120 case EXPR_COMPOUND_LITERAL:
3121 return compound_literal_to_firm(&expression->compound_literal);
3122 case EXPR_LABEL_ADDRESS:
3123 return label_address_to_firm(&expression->label_address);
3129 panic("invalid expression found");
3132 static bool produces_mode_b(const expression_t *expression)
3134 switch (expression->kind) {
3135 case EXPR_BINARY_EQUAL:
3136 case EXPR_BINARY_NOTEQUAL:
3137 case EXPR_BINARY_LESS:
3138 case EXPR_BINARY_LESSEQUAL:
3139 case EXPR_BINARY_GREATER:
3140 case EXPR_BINARY_GREATEREQUAL:
3141 case EXPR_BINARY_ISGREATER:
3142 case EXPR_BINARY_ISGREATEREQUAL:
3143 case EXPR_BINARY_ISLESS:
3144 case EXPR_BINARY_ISLESSEQUAL:
3145 case EXPR_BINARY_ISLESSGREATER:
3146 case EXPR_BINARY_ISUNORDERED:
3147 case EXPR_UNARY_NOT:
3150 case EXPR_BINARY_BUILTIN_EXPECT:
3151 return produces_mode_b(expression->binary.left);
3152 case EXPR_BINARY_COMMA:
3153 return produces_mode_b(expression->binary.right);
3160 static ir_node *expression_to_firm(const expression_t *expression)
3162 if (!produces_mode_b(expression)) {
3163 ir_node *res = _expression_to_firm(expression);
3164 assert(res == NULL || get_irn_mode(res) != mode_b);
3168 if (is_constant_expression(expression)) {
3169 ir_node *res = _expression_to_firm(expression);
3170 ir_mode *mode = get_ir_mode(expression->base.type);
3171 assert(is_Const(res));
3172 if (is_Const_null(res)) {
3173 return new_Const_long(mode, 0);
3175 return new_Const_long(mode, 1);
3179 /* we have to produce a 0/1 from the mode_b expression */
3180 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3181 return produce_condition_result(expression, dbgi);
3185 * create a short-circuit expression evaluation that tries to construct
3186 * efficient control flow structures for &&, || and ! expressions
3188 static ir_node *create_condition_evaluation(const expression_t *expression,
3189 ir_node *true_block,
3190 ir_node *false_block)
3192 switch(expression->kind) {
3193 case EXPR_UNARY_NOT: {
3194 const unary_expression_t *unary_expression = &expression->unary;
3195 create_condition_evaluation(unary_expression->value, false_block,
3199 case EXPR_BINARY_LOGICAL_AND: {
3200 const binary_expression_t *binary_expression = &expression->binary;
3202 ir_node *cur_block = get_cur_block();
3203 ir_node *extra_block = new_immBlock();
3204 set_cur_block(cur_block);
3205 create_condition_evaluation(binary_expression->left, extra_block,
3207 mature_immBlock(extra_block);
3208 set_cur_block(extra_block);
3209 create_condition_evaluation(binary_expression->right, true_block,
3213 case EXPR_BINARY_LOGICAL_OR: {
3214 const binary_expression_t *binary_expression = &expression->binary;
3216 ir_node *cur_block = get_cur_block();
3217 ir_node *extra_block = new_immBlock();
3218 set_cur_block(cur_block);
3219 create_condition_evaluation(binary_expression->left, true_block,
3221 mature_immBlock(extra_block);
3222 set_cur_block(extra_block);
3223 create_condition_evaluation(binary_expression->right, true_block,
3231 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3232 ir_node *cond_expr = _expression_to_firm(expression);
3233 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3234 ir_node *cond = new_d_Cond(dbgi, condition);
3235 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3236 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3238 /* set branch prediction info based on __builtin_expect */
3239 if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3240 long cnst = fold_constant(expression->binary.right);
3241 cond_jmp_predicate pred;
3244 pred = COND_JMP_PRED_FALSE;
3246 pred = COND_JMP_PRED_TRUE;
3248 set_Cond_jmp_pred(cond, pred);
3251 add_immBlock_pred(true_block, true_proj);
3252 if (false_block != NULL) {
3253 add_immBlock_pred(false_block, false_proj);
3256 set_cur_block(NULL);
3262 static void create_declaration_entity(declaration_t *declaration,
3263 declaration_kind_t declaration_kind,
3264 ir_type *parent_type)
3266 type_t *const type = skip_typeref(declaration->type);
3267 if (is_type_function(type)) {
3268 (void) get_function_entity(declaration);
3272 ident *const id = new_id_from_str(declaration->symbol->string);
3273 ir_type *const irtype = get_ir_type(type);
3274 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
3275 ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3277 handle_gnu_attributes_ent(entity, declaration);
3279 declaration->declaration_kind = (unsigned char) declaration_kind;
3280 declaration->v.entity = entity;
3281 set_entity_variability(entity, variability_uninitialized);
3282 set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3283 if (parent_type == get_tls_type())
3284 set_entity_allocation(entity, allocation_automatic);
3285 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3286 set_entity_allocation(entity, allocation_static);
3288 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3289 set_entity_volatility(entity, volatility_is_volatile);
3294 typedef struct type_path_entry_t type_path_entry_t;
3295 struct type_path_entry_t {
3297 ir_initializer_t *initializer;
3299 declaration_t *compound_entry;
3302 typedef struct type_path_t type_path_t;
3303 struct type_path_t {
3304 type_path_entry_t *path;
3309 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3311 size_t len = ARR_LEN(path->path);
3313 for(size_t i = 0; i < len; ++i) {
3314 const type_path_entry_t *entry = & path->path[i];
3316 type_t *type = skip_typeref(entry->type);
3317 if (is_type_compound(type)) {
3318 fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3319 } else if (is_type_array(type)) {
3320 fprintf(stderr, "[%zu]", entry->index);
3322 fprintf(stderr, "-INVALID-");
3325 fprintf(stderr, " (");
3326 print_type(path->top_type);
3327 fprintf(stderr, ")");
3330 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3332 size_t len = ARR_LEN(path->path);
3334 return & path->path[len-1];
3337 static type_path_entry_t *append_to_type_path(type_path_t *path)
3339 size_t len = ARR_LEN(path->path);
3340 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3342 type_path_entry_t *result = & path->path[len];
3343 memset(result, 0, sizeof(result[0]));
3347 static size_t get_compound_size(const compound_type_t *type)
3349 declaration_t *declaration = type->declaration;
3350 declaration_t *member = declaration->scope.declarations;
3352 for( ; member != NULL; member = member->next) {
3355 /* TODO: cache results? */
3360 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3362 type_t *orig_top_type = path->top_type;
3363 type_t *top_type = skip_typeref(orig_top_type);
3365 assert(is_type_compound(top_type) || is_type_array(top_type));
3367 if (ARR_LEN(path->path) == 0) {
3370 type_path_entry_t *top = get_type_path_top(path);
3371 ir_initializer_t *initializer = top->initializer;
3372 return get_initializer_compound_value(initializer, top->index);
3376 static void descend_into_subtype(type_path_t *path)
3378 type_t *orig_top_type = path->top_type;
3379 type_t *top_type = skip_typeref(orig_top_type);
3381 assert(is_type_compound(top_type) || is_type_array(top_type));
3383 ir_initializer_t *initializer = get_initializer_entry(path);
3385 type_path_entry_t *top = append_to_type_path(path);
3386 top->type = top_type;
3390 if (is_type_compound(top_type)) {
3391 declaration_t *declaration = top_type->compound.declaration;
3392 declaration_t *entry = declaration->scope.declarations;
3394 top->compound_entry = entry;
3396 len = get_compound_size(&top_type->compound);
3398 path->top_type = entry->type;
3400 assert(is_type_array(top_type));
3401 assert(top_type->array.size > 0);
3404 path->top_type = top_type->array.element_type;
3405 len = top_type->array.size;
3407 if (initializer == NULL
3408 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3409 initializer = create_initializer_compound(len);
3410 /* we have to set the entry at the 2nd latest path entry... */
3411 size_t path_len = ARR_LEN(path->path);
3412 assert(path_len >= 1);
3414 type_path_entry_t *entry = & path->path[path_len-2];
3415 ir_initializer_t *tinitializer = entry->initializer;
3416 set_initializer_compound_value(tinitializer, entry->index,
3420 top->initializer = initializer;
3423 static void ascend_from_subtype(type_path_t *path)
3425 type_path_entry_t *top = get_type_path_top(path);
3427 path->top_type = top->type;
3429 size_t len = ARR_LEN(path->path);
3430 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3433 static void walk_designator(type_path_t *path, const designator_t *designator)
3435 /* designators start at current object type */
3436 ARR_RESIZE(type_path_entry_t, path->path, 1);
3438 for( ; designator != NULL; designator = designator->next) {
3439 type_path_entry_t *top = get_type_path_top(path);
3440 type_t *orig_type = top->type;
3441 type_t *type = skip_typeref(orig_type);
3443 if (designator->symbol != NULL) {
3444 assert(is_type_compound(type));
3446 symbol_t *symbol = designator->symbol;
3448 declaration_t *declaration = type->compound.declaration;
3449 declaration_t *iter = declaration->scope.declarations;
3450 for( ; iter != NULL; iter = iter->next, ++index) {
3451 if (iter->symbol == symbol) {
3455 assert(iter != NULL);
3457 top->type = orig_type;
3458 top->compound_entry = iter;
3460 orig_type = iter->type;
3462 expression_t *array_index = designator->array_index;
3463 assert(designator->array_index != NULL);
3464 assert(is_type_array(type));
3466 long index = fold_constant(array_index);
3469 if (type->array.size_constant) {
3470 long array_size = type->array.size;
3471 assert(index < array_size);
3475 top->type = orig_type;
3476 top->index = (size_t) index;
3477 orig_type = type->array.element_type;
3479 path->top_type = orig_type;
3481 if (designator->next != NULL) {
3482 descend_into_subtype(path);
3486 path->invalid = false;
3489 static void advance_current_object(type_path_t *path)
3491 if (path->invalid) {
3492 /* TODO: handle this... */
3493 panic("invalid initializer in ast2firm (excessive elements)");
3497 type_path_entry_t *top = get_type_path_top(path);
3499 type_t *type = skip_typeref(top->type);
3500 if (is_type_union(type)) {
3501 top->compound_entry = NULL;
3502 } else if (is_type_struct(type)) {
3503 declaration_t *entry = top->compound_entry;
3506 entry = entry->next;
3507 top->compound_entry = entry;
3508 if (entry != NULL) {
3509 path->top_type = entry->type;
3513 assert(is_type_array(type));
3516 if (!type->array.size_constant || top->index < type->array.size) {
3521 /* we're past the last member of the current sub-aggregate, try if we
3522 * can ascend in the type hierarchy and continue with another subobject */
3523 size_t len = ARR_LEN(path->path);
3526 ascend_from_subtype(path);
3527 advance_current_object(path);
3529 path->invalid = true;
3534 static ir_initializer_t *create_ir_initializer(
3535 const initializer_t *initializer, type_t *type);
3537 static ir_initializer_t *create_ir_initializer_value(
3538 const initializer_value_t *initializer)
3540 if (is_type_compound(initializer->value->base.type)) {
3541 panic("initializer creation for compounds not implemented yet");
3543 ir_node *value = expression_to_firm(initializer->value);
3544 return create_initializer_const(value);
3547 static ir_initializer_t *create_ir_initializer_list(
3548 const initializer_list_t *initializer, type_t *type)
3551 memset(&path, 0, sizeof(path));
3552 path.top_type = type;
3553 path.path = NEW_ARR_F(type_path_entry_t, 0);
3555 descend_into_subtype(&path);
3557 for(size_t i = 0; i < initializer->len; ++i) {
3558 const initializer_t *sub_initializer = initializer->initializers[i];
3560 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3561 walk_designator(&path, sub_initializer->designator.designator);
3565 if (sub_initializer->kind == INITIALIZER_VALUE) {
3566 /* we might have to descend into types until we're at a scalar
3569 type_t *orig_top_type = path.top_type;
3570 type_t *top_type = skip_typeref(orig_top_type);
3572 if (is_type_scalar(top_type))
3574 descend_into_subtype(&path);
3578 ir_initializer_t *sub_irinitializer
3579 = create_ir_initializer(sub_initializer, path.top_type);
3581 size_t path_len = ARR_LEN(path.path);
3582 assert(path_len >= 1);
3583 type_path_entry_t *entry = & path.path[path_len-1];
3584 ir_initializer_t *tinitializer = entry->initializer;
3585 set_initializer_compound_value(tinitializer, entry->index,
3588 advance_current_object(&path);
3591 assert(ARR_LEN(path.path) >= 1);
3592 ir_initializer_t *result = path.path[0].initializer;
3593 DEL_ARR_F(path.path);
3598 static ir_initializer_t *create_ir_initializer_string(
3599 const initializer_string_t *initializer, type_t *type)
3601 type = skip_typeref(type);
3603 size_t string_len = initializer->string.size;
3604 assert(type->kind == TYPE_ARRAY);
3605 assert(type->array.size_constant);
3606 size_t len = type->array.size;
3607 ir_initializer_t *irinitializer = create_initializer_compound(len);
3609 const char *string = initializer->string.begin;
3610 ir_mode *mode = get_ir_mode(type->array.element_type);
3612 for(size_t i = 0; i < len; ++i) {
3617 tarval *tv = new_tarval_from_long(c, mode);
3618 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3620 set_initializer_compound_value(irinitializer, i, char_initializer);
3623 return irinitializer;
3626 static ir_initializer_t *create_ir_initializer_wide_string(
3627 const initializer_wide_string_t *initializer, type_t *type)
3629 size_t string_len = initializer->string.size;
3630 assert(type->kind == TYPE_ARRAY);
3631 assert(type->array.size_constant);
3632 size_t len = type->array.size;
3633 ir_initializer_t *irinitializer = create_initializer_compound(len);
3635 const wchar_rep_t *string = initializer->string.begin;
3636 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3638 for(size_t i = 0; i < len; ++i) {
3640 if (i < string_len) {
3643 tarval *tv = new_tarval_from_long(c, mode);
3644 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3646 set_initializer_compound_value(irinitializer, i, char_initializer);
3649 return irinitializer;
3652 static ir_initializer_t *create_ir_initializer(
3653 const initializer_t *initializer, type_t *type)
3655 switch(initializer->kind) {
3656 case INITIALIZER_STRING:
3657 return create_ir_initializer_string(&initializer->string, type);
3659 case INITIALIZER_WIDE_STRING:
3660 return create_ir_initializer_wide_string(&initializer->wide_string,
3663 case INITIALIZER_LIST:
3664 return create_ir_initializer_list(&initializer->list, type);
3666 case INITIALIZER_VALUE:
3667 return create_ir_initializer_value(&initializer->value);
3669 case INITIALIZER_DESIGNATOR:
3670 panic("unexpected designator initializer found");
3672 panic("unknown initializer");
3675 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3678 if (is_atomic_type(type)) {
3679 ir_mode *mode = get_type_mode(type);
3680 tarval *zero = get_mode_null(mode);
3681 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3683 /* TODO: bitfields */
3684 ir_node *mem = get_store();
3685 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3686 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3689 assert(is_compound_type(type));
3692 if (is_Array_type(type)) {
3693 assert(has_array_upper_bound(type, 0));
3694 n_members = get_array_upper_bound_int(type, 0);
3696 n_members = get_compound_n_members(type);
3699 for(int i = 0; i < n_members; ++i) {
3702 if (is_Array_type(type)) {
3703 ir_entity *entity = get_array_element_entity(type);
3704 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3705 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3706 ir_node *in[1] = { cnst };
3707 irtype = get_array_element_type(type);
3708 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3710 ir_entity *member = get_compound_member(type, i);
3712 irtype = get_entity_type(member);
3713 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3716 create_dynamic_null_initializer(irtype, dbgi, addr);
3721 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3722 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3724 switch(get_initializer_kind(initializer)) {
3725 case IR_INITIALIZER_NULL: {
3726 create_dynamic_null_initializer(type, dbgi, base_addr);
3729 case IR_INITIALIZER_CONST: {
3730 ir_node *node = get_initializer_const_value(initializer);
3731 ir_mode *mode = get_irn_mode(node);
3732 ir_type *ent_type = get_entity_type(entity);
3734 /* is it a bitfield type? */
3735 if (is_Primitive_type(ent_type) &&
3736 get_primitive_base_type(ent_type) != NULL) {
3737 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3741 assert(get_type_mode(type) == mode);
3742 ir_node *mem = get_store();
3743 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3744 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3748 case IR_INITIALIZER_TARVAL: {
3749 tarval *tv = get_initializer_tarval_value(initializer);
3750 ir_mode *mode = get_tarval_mode(tv);
3751 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3752 ir_type *ent_type = get_entity_type(entity);
3754 /* is it a bitfield type? */
3755 if (is_Primitive_type(ent_type) &&
3756 get_primitive_base_type(ent_type) != NULL) {
3757 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3761 assert(get_type_mode(type) == mode);
3762 ir_node *mem = get_store();
3763 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3764 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3768 case IR_INITIALIZER_COMPOUND: {
3769 assert(is_compound_type(type));
3771 if (is_Array_type(type)) {
3772 assert(has_array_upper_bound(type, 0));
3773 n_members = get_array_upper_bound_int(type, 0);
3775 n_members = get_compound_n_members(type);
3778 if (get_initializer_compound_n_entries(initializer)
3779 != (unsigned) n_members)
3780 panic("initializer doesn't match compound type");
3782 for(int i = 0; i < n_members; ++i) {
3785 ir_entity *sub_entity;
3786 if (is_Array_type(type)) {
3787 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3788 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3789 ir_node *in[1] = { cnst };
3790 irtype = get_array_element_type(type);
3791 sub_entity = get_array_element_entity(type);
3792 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3795 sub_entity = get_compound_member(type, i);
3796 irtype = get_entity_type(sub_entity);
3797 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3801 ir_initializer_t *sub_init
3802 = get_initializer_compound_value(initializer, i);
3804 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3811 panic("invalid IR_INITIALIZER found");
3814 static void create_dynamic_initializer(ir_initializer_t *initializer,
3815 dbg_info *dbgi, ir_entity *entity)
3817 ir_node *frame = get_local_frame(entity);
3818 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3819 ir_type *type = get_entity_type(entity);
3821 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3824 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3825 ir_entity *entity, type_t *type)
3827 ir_node *memory = get_store();
3828 ir_node *nomem = new_NoMem();
3829 ir_node *frame = get_irg_frame(current_ir_graph);
3830 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3832 if (initializer->kind == INITIALIZER_VALUE) {
3833 initializer_value_t *initializer_value = &initializer->value;
3835 ir_node *value = expression_to_firm(initializer_value->value);
3836 type = skip_typeref(type);
3837 assign_value(dbgi, addr, type, value);
3841 if (!is_constant_initializer(initializer)) {
3842 ir_initializer_t *irinitializer
3843 = create_ir_initializer(initializer, type);
3845 create_dynamic_initializer(irinitializer, dbgi, entity);
3849 /* create the ir_initializer */
3850 ir_graph *const old_current_ir_graph = current_ir_graph;
3851 current_ir_graph = get_const_code_irg();
3853 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3855 assert(current_ir_graph == get_const_code_irg());
3856 current_ir_graph = old_current_ir_graph;
3858 /* create a "template" entity which is copied to the entity on the stack */
3859 ident *const id = id_unique("initializer.%u");
3860 ir_type *const irtype = get_ir_type(type);
3861 ir_type *const global_type = get_glob_type();
3862 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3863 set_entity_ld_ident(init_entity, id);
3865 set_entity_variability(init_entity, variability_initialized);
3866 set_entity_visibility(init_entity, visibility_local);
3867 set_entity_allocation(init_entity, allocation_static);
3869 set_entity_initializer(init_entity, irinitializer);
3871 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3872 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3874 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3875 set_store(copyb_mem);
3878 static void create_initializer_local_variable_entity(declaration_t *declaration)
3880 initializer_t *initializer = declaration->init.initializer;
3881 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3882 ir_entity *entity = declaration->v.entity;
3883 type_t *type = declaration->type;
3884 create_local_initializer(initializer, dbgi, entity, type);
3887 static void create_declaration_initializer(declaration_t *declaration)
3889 initializer_t *initializer = declaration->init.initializer;
3890 if (initializer == NULL)
3893 declaration_kind_t declaration_kind
3894 = (declaration_kind_t) declaration->declaration_kind;
3895 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3896 create_initializer_local_variable_entity(declaration);
3900 type_t *type = declaration->type;
3901 type_qualifiers_t tq = get_type_qualifier(type, true);
3903 if (initializer->kind == INITIALIZER_VALUE) {
3904 initializer_value_t *initializer_value = &initializer->value;
3906 = get_dbg_info(&declaration->source_position);
3908 ir_node *value = expression_to_firm(initializer_value->value);
3909 value = do_strict_conv(dbgi, value);
3911 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3912 set_value(declaration->v.value_number, value);
3914 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3916 ir_entity *entity = declaration->v.entity;
3918 if (tq & TYPE_QUALIFIER_CONST) {
3919 set_entity_variability(entity, variability_constant);
3921 set_entity_variability(entity, variability_initialized);
3923 set_atomic_ent_value(entity, value);
3926 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3927 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3929 ir_entity *entity = declaration->v.entity;
3930 ir_initializer_t *irinitializer
3931 = create_ir_initializer(initializer, type);
3933 if (tq & TYPE_QUALIFIER_CONST) {
3934 set_entity_variability(entity, variability_constant);
3936 set_entity_variability(entity, variability_initialized);
3938 set_entity_initializer(entity, irinitializer);
3942 static void create_variable_length_array(declaration_t *declaration)
3944 /* initializers are not allowed for VLAs */
3945 assert(declaration->init.initializer == NULL);
3947 declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3948 declaration->v.vla_base = NULL;
3950 /* TODO: record VLA somewhere so we create the free node when we leave
3954 static void allocate_variable_length_array(declaration_t *declaration)
3956 /* initializers are not allowed for VLAs */
3957 assert(declaration->init.initializer == NULL);
3958 assert(get_cur_block() != NULL);
3960 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3961 type_t *type = declaration->type;
3962 ir_type *el_type = get_ir_type(type->array.element_type);
3964 /* make sure size_node is calculated */
3965 get_type_size(type);
3966 ir_node *elems = type->array.size_node;
3967 ir_node *mem = get_store();
3968 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3970 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3971 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3974 assert(declaration->declaration_kind
3975 == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3976 declaration->v.vla_base = addr;
3980 * Creates a Firm local variable from a declaration.
3982 static void create_local_variable(declaration_t *declaration)
3984 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3986 bool needs_entity = declaration->address_taken;
3987 type_t *type = skip_typeref(declaration->type);
3989 /* is it a variable length array? */
3990 if (is_type_array(type) && !type->array.size_constant) {
3991 create_variable_length_array(declaration);
3993 } else if (is_type_array(type) || is_type_compound(type)) {
3994 needs_entity = true;
3995 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3996 needs_entity = true;
4000 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4001 create_declaration_entity(declaration,
4002 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4005 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4006 declaration->v.value_number = next_value_number_function;
4007 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
4008 ++next_value_number_function;
4012 static void create_local_static_variable(declaration_t *declaration)
4014 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
4016 type_t *const type = skip_typeref(declaration->type);
4017 ir_type *const global_type = get_glob_type();
4018 ir_type *const irtype = get_ir_type(type);
4019 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
4021 size_t l = strlen(declaration->symbol->string);
4022 char buf[l + sizeof(".%u")];
4023 snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
4024 ident *const id = id_unique(buf);
4026 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
4028 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4029 set_entity_volatility(entity, volatility_is_volatile);
4032 declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4033 declaration->v.entity = entity;
4034 set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
4035 set_entity_variability(entity, variability_uninitialized);
4036 set_entity_visibility(entity, visibility_local);
4037 set_entity_allocation(entity, allocation_static);
4039 ir_graph *const old_current_ir_graph = current_ir_graph;
4040 current_ir_graph = get_const_code_irg();
4042 create_declaration_initializer(declaration);
4044 assert(current_ir_graph == get_const_code_irg());
4045 current_ir_graph = old_current_ir_graph;
4050 static void return_statement_to_firm(return_statement_t *statement)
4052 if (get_cur_block() == NULL)
4055 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4056 ir_type *func_irtype = get_ir_type(current_function_decl->type);
4061 if (get_method_n_ress(func_irtype) > 0) {
4062 ir_type *res_type = get_method_res_type(func_irtype, 0);
4064 if (statement->value != NULL) {
4065 ir_node *node = expression_to_firm(statement->value);
4066 node = do_strict_conv(dbgi, node);
4070 if (is_compound_type(res_type)) {
4073 mode = get_type_mode(res_type);
4075 in[0] = new_Unknown(mode);
4079 /* build return_value for its side effects */
4080 if (statement->value != NULL) {
4081 expression_to_firm(statement->value);
4086 ir_node *store = get_store();
4087 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4089 ir_node *end_block = get_irg_end_block(current_ir_graph);
4090 add_immBlock_pred(end_block, ret);
4092 set_cur_block(NULL);
4095 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4097 if (get_cur_block() == NULL)
4100 return expression_to_firm(statement->expression);
4103 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4105 declaration_t *declaration = compound->scope.declarations;
4106 for( ; declaration != NULL; declaration = declaration->next) {
4107 create_local_declaration(declaration);
4110 ir_node *result = NULL;
4111 statement_t *statement = compound->statements;
4112 for( ; statement != NULL; statement = statement->base.next) {
4113 if (statement->base.next == NULL
4114 && statement->kind == STATEMENT_EXPRESSION) {
4115 result = expression_statement_to_firm(
4116 &statement->expression);
4119 statement_to_firm(statement);
4125 static void create_global_variable(declaration_t *declaration)
4129 switch ((storage_class_tag_t)declaration->storage_class) {
4130 case STORAGE_CLASS_STATIC:
4131 vis = visibility_local;
4134 case STORAGE_CLASS_EXTERN:
4135 vis = visibility_external_allocated;
4138 case STORAGE_CLASS_NONE:
4139 vis = visibility_external_visible;
4142 case STORAGE_CLASS_THREAD:
4143 vis = visibility_external_visible;
4146 case STORAGE_CLASS_THREAD_EXTERN:
4147 vis = visibility_external_allocated;
4150 case STORAGE_CLASS_THREAD_STATIC:
4151 vis = visibility_local;
4155 var_type = get_tls_type();
4159 var_type = get_glob_type();
4163 create_declaration_entity(declaration,
4164 DECLARATION_KIND_GLOBAL_VARIABLE,
4166 if (!is_type_function(skip_typeref(declaration->type))) {
4167 set_entity_visibility(declaration->v.entity, vis);
4172 case STORAGE_CLASS_TYPEDEF:
4173 case STORAGE_CLASS_AUTO:
4174 case STORAGE_CLASS_REGISTER:
4175 case STORAGE_CLASS_ENUM_ENTRY:
4178 panic("Invalid storage class for global variable");
4181 static void create_local_declaration(declaration_t *declaration)
4183 if (declaration->namespc != NAMESPACE_NORMAL)
4185 /* construct type */
4186 (void) get_ir_type(declaration->type);
4187 if (declaration->symbol == NULL) {
4191 type_t *type = skip_typeref(declaration->type);
4193 switch ((storage_class_tag_t) declaration->storage_class) {
4194 case STORAGE_CLASS_STATIC:
4195 create_local_static_variable(declaration);
4197 case STORAGE_CLASS_EXTERN:
4198 create_global_variable(declaration);
4199 create_declaration_initializer(declaration);
4201 case STORAGE_CLASS_NONE:
4202 case STORAGE_CLASS_AUTO:
4203 case STORAGE_CLASS_REGISTER:
4204 if (is_type_function(type)) {
4205 if (declaration->init.statement != NULL) {
4206 get_function_entity(declaration);
4207 declaration->declaration_kind = DECLARATION_KIND_INNER_FUNCTION;
4208 enqueue_inner_function(declaration);
4210 get_function_entity(declaration);
4213 create_local_variable(declaration);
4216 case STORAGE_CLASS_ENUM_ENTRY:
4217 /* should already be handled */
4218 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4220 case STORAGE_CLASS_TYPEDEF:
4221 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4223 case STORAGE_CLASS_THREAD:
4224 case STORAGE_CLASS_THREAD_EXTERN:
4225 case STORAGE_CLASS_THREAD_STATIC:
4228 panic("invalid storage class found");
4231 static void initialize_local_declaration(declaration_t *declaration)
4233 if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4236 switch ((declaration_kind_t) declaration->declaration_kind) {
4237 case DECLARATION_KIND_LOCAL_VARIABLE:
4238 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4239 create_declaration_initializer(declaration);
4242 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4243 allocate_variable_length_array(declaration);
4246 case DECLARATION_KIND_LABEL_BLOCK:
4247 case DECLARATION_KIND_COMPOUND_MEMBER:
4248 case DECLARATION_KIND_GLOBAL_VARIABLE:
4249 case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4250 case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4251 case DECLARATION_KIND_FUNCTION:
4252 case DECLARATION_KIND_TYPE:
4253 case DECLARATION_KIND_ENUM_ENTRY:
4254 case DECLARATION_KIND_INNER_FUNCTION:
4257 case DECLARATION_KIND_UNKNOWN:
4258 panic("can't initialize unknown declaration");
4260 panic("invalid declaration kind");
4263 static void declaration_statement_to_firm(declaration_statement_t *statement)
4265 declaration_t *declaration = statement->declarations_begin;
4266 declaration_t *end = statement->declarations_end->next;
4267 for( ; declaration != end; declaration = declaration->next) {
4268 if (declaration->namespc != NAMESPACE_NORMAL)
4270 initialize_local_declaration(declaration);
4274 static void if_statement_to_firm(if_statement_t *statement)
4276 ir_node *cur_block = get_cur_block();
4278 ir_node *fallthrough_block = NULL;
4280 /* the true (blocks) */
4281 ir_node *true_block = NULL;
4282 if (statement->true_statement != NULL) {
4283 true_block = new_immBlock();
4284 statement_to_firm(statement->true_statement);
4285 if (get_cur_block() != NULL) {
4286 ir_node *jmp = new_Jmp();
4287 if (fallthrough_block == NULL)
4288 fallthrough_block = new_immBlock();
4289 add_immBlock_pred(fallthrough_block, jmp);
4293 /* the false (blocks) */
4294 ir_node *false_block = NULL;
4295 if (statement->false_statement != NULL) {
4296 false_block = new_immBlock();
4298 statement_to_firm(statement->false_statement);
4299 if (get_cur_block() != NULL) {
4300 ir_node *jmp = new_Jmp();
4301 if (fallthrough_block == NULL)
4302 fallthrough_block = new_immBlock();
4303 add_immBlock_pred(fallthrough_block, jmp);
4307 /* create the condition */
4308 if (cur_block != NULL) {
4309 if (true_block == NULL || false_block == NULL) {
4310 if (fallthrough_block == NULL)
4311 fallthrough_block = new_immBlock();
4312 if (true_block == NULL)
4313 true_block = fallthrough_block;
4314 if (false_block == NULL)
4315 false_block = fallthrough_block;
4318 set_cur_block(cur_block);
4319 create_condition_evaluation(statement->condition, true_block,
4323 mature_immBlock(true_block);
4324 if (false_block != fallthrough_block && false_block != NULL) {
4325 mature_immBlock(false_block);
4327 if (fallthrough_block != NULL) {
4328 mature_immBlock(fallthrough_block);
4331 set_cur_block(fallthrough_block);
4334 static void while_statement_to_firm(while_statement_t *statement)
4336 ir_node *jmp = NULL;
4337 if (get_cur_block() != NULL) {
4341 /* create the header block */
4342 ir_node *header_block = new_immBlock();
4344 add_immBlock_pred(header_block, jmp);
4348 ir_node *old_continue_label = continue_label;
4349 ir_node *old_break_label = break_label;
4350 continue_label = header_block;
4353 ir_node *body_block = new_immBlock();
4354 statement_to_firm(statement->body);
4355 ir_node *false_block = break_label;
4357 assert(continue_label == header_block);
4358 continue_label = old_continue_label;
4359 break_label = old_break_label;
4361 if (get_cur_block() != NULL) {
4363 add_immBlock_pred(header_block, jmp);
4366 /* shortcut for while(true) */
4367 if (is_constant_expression(statement->condition)
4368 && fold_constant(statement->condition) != 0) {
4369 set_cur_block(header_block);
4370 ir_node *header_jmp = new_Jmp();
4371 add_immBlock_pred(body_block, header_jmp);
4373 keep_alive(body_block);
4374 keep_all_memory(body_block);
4375 set_cur_block(body_block);
4377 if (false_block == NULL) {
4378 false_block = new_immBlock();
4381 /* create the condition */
4382 set_cur_block(header_block);
4384 create_condition_evaluation(statement->condition, body_block,
4388 mature_immBlock(body_block);
4389 mature_immBlock(header_block);
4390 if (false_block != NULL) {
4391 mature_immBlock(false_block);
4394 set_cur_block(false_block);
4397 static void do_while_statement_to_firm(do_while_statement_t *statement)
4399 ir_node *jmp = NULL;
4400 if (get_cur_block() != NULL) {
4404 /* create the header block */
4405 ir_node *header_block = new_immBlock();
4408 ir_node *body_block = new_immBlock();
4410 add_immBlock_pred(body_block, jmp);
4413 ir_node *old_continue_label = continue_label;
4414 ir_node *old_break_label = break_label;
4415 continue_label = header_block;
4418 statement_to_firm(statement->body);
4419 ir_node *false_block = break_label;
4421 assert(continue_label == header_block);
4422 continue_label = old_continue_label;
4423 break_label = old_break_label;
4425 if (get_cur_block() != NULL) {
4426 ir_node *body_jmp = new_Jmp();
4427 add_immBlock_pred(header_block, body_jmp);
4428 mature_immBlock(header_block);
4431 if (false_block == NULL) {
4432 false_block = new_immBlock();
4435 /* create the condition */
4436 set_cur_block(header_block);
4438 create_condition_evaluation(statement->condition, body_block, false_block);
4439 mature_immBlock(body_block);
4440 mature_immBlock(header_block);
4441 if (false_block != NULL) {
4442 mature_immBlock(false_block);
4445 set_cur_block(false_block);
4448 static void for_statement_to_firm(for_statement_t *statement)
4450 ir_node *jmp = NULL;
4452 /* create declarations */
4453 declaration_t *declaration = statement->scope.declarations;
4454 for( ; declaration != NULL; declaration = declaration->next) {
4455 create_local_declaration(declaration);
4458 if (get_cur_block() != NULL) {
4459 declaration = statement->scope.declarations;
4460 for( ; declaration != NULL; declaration = declaration->next) {
4461 initialize_local_declaration(declaration);
4464 if (statement->initialisation != NULL) {
4465 expression_to_firm(statement->initialisation);
4472 /* create the step block */
4473 ir_node *const step_block = new_immBlock();
4474 if (statement->step != NULL) {
4475 expression_to_firm(statement->step);
4477 ir_node *const step_jmp = new_Jmp();
4479 /* create the header block */
4480 ir_node *const header_block = new_immBlock();
4482 add_immBlock_pred(header_block, jmp);
4484 add_immBlock_pred(header_block, step_jmp);
4486 /* the false block */
4487 ir_node *const false_block = new_immBlock();
4490 ir_node * body_block;
4491 if (statement->body != NULL) {
4492 ir_node *const old_continue_label = continue_label;
4493 ir_node *const old_break_label = break_label;
4494 continue_label = step_block;
4495 break_label = false_block;
4497 body_block = new_immBlock();
4498 statement_to_firm(statement->body);
4500 assert(continue_label == step_block);
4501 assert(break_label == false_block);
4502 continue_label = old_continue_label;
4503 break_label = old_break_label;
4505 if (get_cur_block() != NULL) {
4507 add_immBlock_pred(step_block, jmp);
4510 body_block = step_block;
4513 /* create the condition */
4514 set_cur_block(header_block);
4515 if (statement->condition != NULL) {
4516 create_condition_evaluation(statement->condition, body_block,
4519 keep_alive(header_block);
4520 keep_all_memory(header_block);
4522 add_immBlock_pred(body_block, jmp);
4525 mature_immBlock(body_block);
4526 mature_immBlock(false_block);
4527 mature_immBlock(step_block);
4528 mature_immBlock(header_block);
4529 mature_immBlock(false_block);
4531 set_cur_block(false_block);
4534 static void create_jump_statement(const statement_t *statement,
4535 ir_node *target_block)
4537 if (get_cur_block() == NULL)
4540 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4541 ir_node *jump = new_d_Jmp(dbgi);
4542 add_immBlock_pred(target_block, jump);
4544 set_cur_block(NULL);
4547 static ir_node *get_break_label(void)
4549 if (break_label == NULL) {
4550 ir_node *cur_block = get_cur_block();
4551 break_label = new_immBlock();
4552 set_cur_block(cur_block);
4557 static void switch_statement_to_firm(switch_statement_t *statement)
4559 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4561 ir_node *expression = expression_to_firm(statement->expression);
4562 ir_node *cond = new_d_Cond(dbgi, expression);
4564 set_cur_block(NULL);
4566 ir_node *const old_switch_cond = current_switch_cond;
4567 ir_node *const old_break_label = break_label;
4568 const bool old_saw_default_label = saw_default_label;
4569 saw_default_label = false;
4570 current_switch_cond = cond;
4572 switch_statement_t *const old_switch = current_switch;
4573 current_switch = statement;
4575 /* determine a free number for the default label */
4576 unsigned long num_cases = 0;
4578 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4579 if (l->expression == NULL) {
4583 if (l->last_case >= l->first_case)
4584 num_cases += l->last_case - l->first_case;
4585 if (l->last_case > def_nr)
4586 def_nr = l->last_case;
4589 if (def_nr + 1 < 0) {
4590 /* Bad: an overflow occurred, we cannot be sure that the
4591 * maximum + 1 is a free number. Scan the values a second
4592 * time to find a free number.
4594 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4597 memset(bits, 0, (num_cases + 7) >> 3);
4598 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4599 if (l->expression == NULL) {
4603 for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4604 if (cns >= 0 && (unsigned long)cns < num_cases)
4605 bits[cns >> 3] |= (1 << (cns & 7));
4608 /* We look at the first num_cases constants:
4609 * Either they are densed, so we took the last (num_cases)
4610 * one, or they are non densed, so we will find one free
4613 for (i = 0; i < num_cases; ++i)
4614 if ((bits[i >> 3] & (i & 7)) == 0)
4622 statement->default_proj_nr = def_nr;
4624 if (statement->body != NULL) {
4625 statement_to_firm(statement->body);
4628 if (get_cur_block() != NULL) {
4629 ir_node *jmp = new_Jmp();
4630 add_immBlock_pred(get_break_label(), jmp);
4633 if (!saw_default_label) {
4634 set_cur_block(get_nodes_block(cond));
4635 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4636 statement->default_proj_nr);
4637 add_immBlock_pred(get_break_label(), proj);
4640 if (break_label != NULL) {
4641 mature_immBlock(break_label);
4643 set_cur_block(break_label);
4645 assert(current_switch_cond == cond);
4646 current_switch = old_switch;
4647 current_switch_cond = old_switch_cond;
4648 break_label = old_break_label;
4649 saw_default_label = old_saw_default_label;
4652 static void case_label_to_firm(const case_label_statement_t *statement)
4654 if (statement->is_empty_range)
4657 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4659 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4662 ir_node *old_block = get_nodes_block(current_switch_cond);
4663 ir_node *block = new_immBlock();
4665 set_cur_block(old_block);
4666 if (statement->expression != NULL) {
4667 long pn = statement->first_case;
4668 long end_pn = statement->last_case;
4669 assert(pn <= end_pn);
4670 /* create jumps for all cases in the given range */
4672 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4673 add_immBlock_pred(block, proj);
4674 } while(pn++ < end_pn);
4676 saw_default_label = true;
4677 proj = new_d_defaultProj(dbgi, current_switch_cond,
4678 current_switch->default_proj_nr);
4680 add_immBlock_pred(block, proj);
4683 if (fallthrough != NULL) {
4684 add_immBlock_pred(block, fallthrough);
4686 mature_immBlock(block);
4687 set_cur_block(block);
4689 if (statement->statement != NULL) {
4690 statement_to_firm(statement->statement);
4694 static void label_to_firm(const label_statement_t *statement)
4696 ir_node *block = get_label_block(statement->label);
4698 if (get_cur_block() != NULL) {
4699 ir_node *jmp = new_Jmp();
4700 add_immBlock_pred(block, jmp);
4703 set_cur_block(block);
4705 keep_all_memory(block);
4707 if (statement->statement != NULL) {
4708 statement_to_firm(statement->statement);
4712 static void goto_to_firm(const goto_statement_t *statement)
4714 if (get_cur_block() == NULL)
4717 if (statement->expression) {
4718 ir_node *irn = expression_to_firm(statement->expression);
4719 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4720 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4722 set_irn_link(ijmp, ijmp_list);
4725 if (statement->outer_fkt_jmp) {
4726 /* TODO: this is a outer function jmp */
4727 panic("outer function jump not implemented");
4729 ir_node *block = get_label_block(statement->label);
4730 ir_node *jmp = new_Jmp();
4731 add_immBlock_pred(block, jmp);
4734 set_cur_block(NULL);
4737 static void asm_statement_to_firm(const asm_statement_t *statement)
4739 bool needs_memory = false;
4741 if (statement->is_volatile) {
4742 needs_memory = true;
4745 size_t n_clobbers = 0;
4746 asm_clobber_t *clobber = statement->clobbers;
4747 for( ; clobber != NULL; clobber = clobber->next) {
4748 const char *clobber_str = clobber->clobber.begin;
4750 if (!be_is_valid_clobber(clobber_str)) {
4751 errorf(&statement->base.source_position,
4752 "invalid clobber '%s' specified", clobber->clobber);
4756 if (strcmp(clobber_str, "memory") == 0) {
4757 needs_memory = true;
4761 ident *id = new_id_from_str(clobber_str);
4762 obstack_ptr_grow(&asm_obst, id);
4765 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4766 ident **clobbers = NULL;
4767 if (n_clobbers > 0) {
4768 clobbers = obstack_finish(&asm_obst);
4771 size_t n_inputs = 0;
4772 asm_argument_t *argument = statement->inputs;
4773 for ( ; argument != NULL; argument = argument->next)
4775 size_t n_outputs = 0;
4776 argument = statement->outputs;
4777 for ( ; argument != NULL; argument = argument->next)
4780 unsigned next_pos = 0;
4782 ir_node *ins[n_inputs + n_outputs + 1];
4785 ir_asm_constraint tmp_in_constraints[n_outputs];
4787 const expression_t *out_exprs[n_outputs];
4788 ir_node *out_addrs[n_outputs];
4789 size_t out_size = 0;
4791 argument = statement->outputs;
4792 for ( ; argument != NULL; argument = argument->next) {
4793 const char *constraints = argument->constraints.begin;
4794 asm_constraint_flags_t asm_flags
4795 = be_parse_asm_constraints(constraints);
4797 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4798 errorf(&statement->base.source_position,
4799 "some constraints in '%s' are not supported", constraints);
4802 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4803 errorf(&statement->base.source_position,
4804 "some constraints in '%s' are invalid", constraints);
4807 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4808 errorf(&statement->base.source_position,
4809 "no write flag specified for output constraints '%s'",
4814 unsigned pos = next_pos++;
4815 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4816 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4817 expression_t *expr = argument->expression;
4818 ir_node *addr = expression_to_addr(expr);
4819 /* in+output, construct an artifical same_as constraint on the
4821 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4823 ir_node *value = get_value_from_lvalue(expr, addr);
4825 snprintf(buf, sizeof(buf), "%u", pos);
4827 ir_asm_constraint constraint;
4828 constraint.pos = pos;
4829 constraint.constraint = new_id_from_str(buf);
4830 constraint.mode = get_ir_mode(expr->base.type);
4831 tmp_in_constraints[in_size] = constraint;
4832 ins[in_size] = value;
4837 out_exprs[out_size] = expr;
4838 out_addrs[out_size] = addr;
4840 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4841 /* pure memory ops need no input (but we have to make sure we
4842 * attach to the memory) */
4843 assert(! (asm_flags &
4844 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4845 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4846 needs_memory = true;
4848 /* we need to attach the address to the inputs */
4849 expression_t *expr = argument->expression;
4851 ir_asm_constraint constraint;
4852 constraint.pos = pos;
4853 constraint.constraint = new_id_from_str(constraints);
4854 constraint.mode = NULL;
4855 tmp_in_constraints[in_size] = constraint;
4857 ins[in_size] = expression_to_addr(expr);
4861 errorf(&statement->base.source_position,
4862 "only modifiers but no place set in constraints '%s'",
4867 ir_asm_constraint constraint;
4868 constraint.pos = pos;
4869 constraint.constraint = new_id_from_str(constraints);
4870 constraint.mode = get_ir_mode(argument->expression->base.type);
4872 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4874 assert(obstack_object_size(&asm_obst)
4875 == out_size * sizeof(ir_asm_constraint));
4876 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4879 obstack_grow(&asm_obst, tmp_in_constraints,
4880 in_size * sizeof(tmp_in_constraints[0]));
4881 /* find and count input and output arguments */
4882 argument = statement->inputs;
4883 for( ; argument != NULL; argument = argument->next) {
4884 const char *constraints = argument->constraints.begin;
4885 asm_constraint_flags_t asm_flags
4886 = be_parse_asm_constraints(constraints);
4888 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4889 errorf(&statement->base.source_position,
4890 "some constraints in '%s' are not supported", constraints);
4893 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4894 errorf(&statement->base.source_position,
4895 "some constraints in '%s' are invalid", constraints);
4898 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4899 errorf(&statement->base.source_position,
4900 "write flag specified for input constraints '%s'",
4906 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4907 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4908 /* we can treat this as "normal" input */
4909 input = expression_to_firm(argument->expression);
4910 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4911 /* pure memory ops need no input (but we have to make sure we
4912 * attach to the memory) */
4913 assert(! (asm_flags &
4914 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4915 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4916 needs_memory = true;
4917 input = expression_to_addr(argument->expression);
4919 errorf(&statement->base.source_position,
4920 "only modifiers but no place set in constraints '%s'",
4925 ir_asm_constraint constraint;
4926 constraint.pos = next_pos++;
4927 constraint.constraint = new_id_from_str(constraints);
4928 constraint.mode = get_irn_mode(input);
4930 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4931 ins[in_size++] = input;
4935 ir_asm_constraint constraint;
4936 constraint.pos = next_pos++;
4937 constraint.constraint = new_id_from_str("");
4938 constraint.mode = mode_M;
4940 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4941 ins[in_size++] = get_store();
4944 assert(obstack_object_size(&asm_obst)
4945 == in_size * sizeof(ir_asm_constraint));
4946 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4948 /* create asm node */
4949 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4951 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4953 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4954 out_size, output_constraints,
4955 n_clobbers, clobbers, asm_text);
4957 if (statement->is_volatile) {
4958 set_irn_pinned(node, op_pin_state_pinned);
4960 set_irn_pinned(node, op_pin_state_floats);
4963 /* create output projs & connect them */
4965 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4970 for (i = 0; i < out_size; ++i) {
4971 const expression_t *out_expr = out_exprs[i];
4973 ir_mode *mode = get_ir_mode(out_expr->base.type);
4974 ir_node *proj = new_Proj(node, mode, pn);
4975 ir_node *addr = out_addrs[i];
4977 set_value_for_expression_addr(out_expr, proj, addr);
4981 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
4982 statement_to_firm(statement->try_statement);
4983 warningf(&statement->base.source_position, "structured exception handling ignored");
4986 static void leave_statement_to_firm(leave_statement_t *statement) {
4987 errorf(&statement->base.source_position, "__leave not supported yet");
4991 * Transform a statement.
4993 static void statement_to_firm(statement_t *statement)
4996 assert(!statement->base.transformed);
4997 statement->base.transformed = true;
5000 switch(statement->kind) {
5001 case STATEMENT_INVALID:
5002 panic("invalid statement found");
5004 case STATEMENT_EMPTY:
5007 case STATEMENT_COMPOUND:
5008 compound_statement_to_firm(&statement->compound);
5010 case STATEMENT_RETURN:
5011 return_statement_to_firm(&statement->returns);
5013 case STATEMENT_EXPRESSION:
5014 expression_statement_to_firm(&statement->expression);
5017 if_statement_to_firm(&statement->ifs);
5019 case STATEMENT_WHILE:
5020 while_statement_to_firm(&statement->whiles);
5022 case STATEMENT_DO_WHILE:
5023 do_while_statement_to_firm(&statement->do_while);
5025 case STATEMENT_DECLARATION:
5026 declaration_statement_to_firm(&statement->declaration);
5028 case STATEMENT_BREAK:
5029 create_jump_statement(statement, get_break_label());
5031 case STATEMENT_CONTINUE:
5032 create_jump_statement(statement, continue_label);
5034 case STATEMENT_SWITCH:
5035 switch_statement_to_firm(&statement->switchs);
5037 case STATEMENT_CASE_LABEL:
5038 case_label_to_firm(&statement->case_label);
5041 for_statement_to_firm(&statement->fors);
5043 case STATEMENT_LABEL:
5044 label_to_firm(&statement->label);
5046 case STATEMENT_GOTO:
5047 goto_to_firm(&statement->gotos);
5050 asm_statement_to_firm(&statement->asms);
5052 case STATEMENT_MS_TRY:
5053 ms_try_statement_to_firm(&statement->ms_try);
5055 case STATEMENT_LEAVE:
5056 leave_statement_to_firm(&statement->leave);
5059 panic("Statement not implemented\n");
5062 static int count_decls_in_expression(const expression_t *expression);
5064 static int count_local_declarations(const declaration_t * decl,
5065 const declaration_t *const end)
5068 for (; decl != end; decl = decl->next) {
5069 if (decl->namespc != NAMESPACE_NORMAL)
5071 type_t *type = skip_typeref(decl->type);
5073 if (!decl->address_taken && is_type_scalar(type))
5075 const initializer_t *initializer = decl->init.initializer;
5076 /* FIXME: should walk initializer hierarchies... */
5077 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
5078 count += count_decls_in_expression(initializer->value.value);
5084 static int count_decls_in_expression(const expression_t *expression) {
5087 if (expression == NULL)
5090 switch((expression_kind_t) expression->base.kind) {
5091 case EXPR_STATEMENT:
5092 return count_decls_in_stmts(expression->statement.statement);
5094 int count_left = count_decls_in_expression(expression->binary.left);
5095 int count_right = count_decls_in_expression(expression->binary.right);
5096 return count_left + count_right;
5099 return count_decls_in_expression(expression->unary.value);
5101 call_argument_t *argument = expression->call.arguments;
5102 for( ; argument != NULL; argument = argument->next) {
5103 count += count_decls_in_expression(argument->expression);
5110 panic("unexpected expression kind");
5112 case EXPR_COMPOUND_LITERAL:
5116 case EXPR_CONDITIONAL:
5117 count += count_decls_in_expression(expression->conditional.condition);
5118 count += count_decls_in_expression(expression->conditional.true_expression);
5119 count += count_decls_in_expression(expression->conditional.false_expression);
5122 case EXPR_BUILTIN_PREFETCH:
5123 count += count_decls_in_expression(expression->builtin_prefetch.adr);
5124 count += count_decls_in_expression(expression->builtin_prefetch.rw);
5125 count += count_decls_in_expression(expression->builtin_prefetch.locality);
5128 case EXPR_BUILTIN_CONSTANT_P:
5129 count += count_decls_in_expression(expression->builtin_constant.value);
5133 count += count_decls_in_expression(expression->select.compound);
5136 case EXPR_ARRAY_ACCESS:
5137 count += count_decls_in_expression(expression->array_access.array_ref);
5138 count += count_decls_in_expression(expression->array_access.index);
5141 case EXPR_CLASSIFY_TYPE:
5142 count += count_decls_in_expression(expression->classify_type.type_expression);
5146 case EXPR_ALIGNOF: {
5147 expression_t *tp_expression = expression->typeprop.tp_expression;
5148 if (tp_expression != NULL) {
5149 count += count_decls_in_expression(tp_expression);
5155 case EXPR_REFERENCE:
5157 case EXPR_CHARACTER_CONSTANT:
5158 case EXPR_WIDE_CHARACTER_CONSTANT:
5159 case EXPR_STRING_LITERAL:
5160 case EXPR_WIDE_STRING_LITERAL:
5162 case EXPR_BUILTIN_SYMBOL:
5165 case EXPR_LABEL_ADDRESS:
5169 /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5170 * (or implement all the missing expressions here/implement a walker)
5176 static int count_decls_in_stmts(const statement_t *stmt)
5179 for (; stmt != NULL; stmt = stmt->base.next) {
5180 switch (stmt->kind) {
5181 case STATEMENT_EMPTY:
5184 case STATEMENT_DECLARATION: {
5185 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5186 count += count_local_declarations(decl_stmt->declarations_begin,
5187 decl_stmt->declarations_end->next);
5191 case STATEMENT_COMPOUND: {
5192 const compound_statement_t *const comp =
5194 count += count_decls_in_stmts(comp->statements);
5198 case STATEMENT_IF: {
5199 const if_statement_t *const if_stmt = &stmt->ifs;
5200 count += count_decls_in_expression(if_stmt->condition);
5201 count += count_decls_in_stmts(if_stmt->true_statement);
5202 count += count_decls_in_stmts(if_stmt->false_statement);
5206 case STATEMENT_SWITCH: {
5207 const switch_statement_t *const switch_stmt = &stmt->switchs;
5208 count += count_decls_in_expression(switch_stmt->expression);
5209 count += count_decls_in_stmts(switch_stmt->body);
5213 case STATEMENT_LABEL: {
5214 const label_statement_t *const label_stmt = &stmt->label;
5215 if (label_stmt->statement != NULL) {
5216 count += count_decls_in_stmts(label_stmt->statement);
5221 case STATEMENT_WHILE: {
5222 const while_statement_t *const while_stmt = &stmt->whiles;
5223 count += count_decls_in_expression(while_stmt->condition);
5224 count += count_decls_in_stmts(while_stmt->body);
5228 case STATEMENT_DO_WHILE: {
5229 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5230 count += count_decls_in_expression(do_while_stmt->condition);
5231 count += count_decls_in_stmts(do_while_stmt->body);
5235 case STATEMENT_FOR: {
5236 const for_statement_t *const for_stmt = &stmt->fors;
5237 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5238 count += count_decls_in_expression(for_stmt->initialisation);
5239 count += count_decls_in_expression(for_stmt->condition);
5240 count += count_decls_in_expression(for_stmt->step);
5241 count += count_decls_in_stmts(for_stmt->body);
5245 case STATEMENT_CASE_LABEL: {
5246 const case_label_statement_t *label = &stmt->case_label;
5247 count += count_decls_in_expression(label->expression);
5248 if (label->statement != NULL) {
5249 count += count_decls_in_stmts(label->statement);
5255 case STATEMENT_BREAK:
5256 case STATEMENT_CONTINUE:
5259 case STATEMENT_EXPRESSION: {
5260 const expression_statement_t *expr_stmt = &stmt->expression;
5261 count += count_decls_in_expression(expr_stmt->expression);
5265 case STATEMENT_GOTO:
5266 case STATEMENT_LEAVE:
5267 case STATEMENT_INVALID:
5270 case STATEMENT_RETURN: {
5271 const return_statement_t *ret_stmt = &stmt->returns;
5272 count += count_decls_in_expression(ret_stmt->value);
5276 case STATEMENT_MS_TRY: {
5277 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5278 count += count_decls_in_stmts(try_stmt->try_statement);
5279 if (try_stmt->except_expression != NULL)
5280 count += count_decls_in_expression(try_stmt->except_expression);
5281 count += count_decls_in_stmts(try_stmt->final_statement);
5289 static int get_function_n_local_vars(declaration_t *declaration)
5293 /* count parameters */
5294 count += count_local_declarations(declaration->scope.declarations, NULL);
5296 /* count local variables declared in body */
5297 count += count_decls_in_stmts(declaration->init.statement);
5302 static void initialize_function_parameters(declaration_t *declaration)
5304 ir_graph *irg = current_ir_graph;
5305 ir_node *args = get_irg_args(irg);
5306 ir_node *start_block = get_irg_start_block(irg);
5307 ir_type *function_irtype = get_ir_type(declaration->type);
5310 declaration_t *parameter = declaration->scope.declarations;
5311 for( ; parameter != NULL; parameter = parameter->next, ++n) {
5312 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5313 type_t *type = skip_typeref(parameter->type);
5315 bool needs_entity = parameter->address_taken;
5316 assert(!is_type_array(type));
5317 if (is_type_compound(type)) {
5318 needs_entity = true;
5322 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5323 ident *id = new_id_from_str(parameter->symbol->string);
5324 set_entity_ident(entity, id);
5326 parameter->declaration_kind
5327 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5328 parameter->v.entity = entity;
5332 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5333 ir_mode *param_mode = get_type_mode(param_irtype);
5336 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5338 ir_mode *mode = get_ir_mode(type);
5339 value = create_conv(NULL, value, mode);
5340 value = do_strict_conv(NULL, value);
5342 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5343 parameter->v.value_number = next_value_number_function;
5344 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5345 ++next_value_number_function;
5347 set_value(parameter->v.value_number, value);
5352 * Handle additional decl modifiers for IR-graphs
5354 * @param irg the IR-graph
5355 * @param dec_modifiers additional modifiers
5357 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5359 if (decl_modifiers & DM_NORETURN) {
5360 /* TRUE if the declaration includes the Microsoft
5361 __declspec(noreturn) specifier. */
5362 set_irg_additional_property(irg, mtp_property_noreturn);
5364 if (decl_modifiers & DM_NOTHROW) {
5365 /* TRUE if the declaration includes the Microsoft
5366 __declspec(nothrow) specifier. */
5367 set_irg_additional_property(irg, mtp_property_nothrow);
5369 if (decl_modifiers & DM_NAKED) {
5370 /* TRUE if the declaration includes the Microsoft
5371 __declspec(naked) specifier. */
5372 set_irg_additional_property(irg, mtp_property_naked);
5374 if (decl_modifiers & DM_FORCEINLINE) {
5375 /* TRUE if the declaration includes the
5376 Microsoft __forceinline specifier. */
5377 set_irg_inline_property(irg, irg_inline_forced);
5379 if (decl_modifiers & DM_NOINLINE) {
5380 /* TRUE if the declaration includes the Microsoft
5381 __declspec(noinline) specifier. */
5382 set_irg_inline_property(irg, irg_inline_forbidden);
5386 static void add_function_pointer(ir_type *segment, ir_entity *method,
5387 const char *unique_template)
5389 ir_type *method_type = get_entity_type(method);
5390 ident *id = id_unique(unique_template);
5391 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5393 ident *ide = id_unique(unique_template);
5394 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5395 ir_graph *irg = get_const_code_irg();
5396 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5399 set_entity_compiler_generated(ptr, 1);
5400 set_entity_variability(ptr, variability_constant);
5401 set_atomic_ent_value(ptr, val);
5405 * Generate possible IJmp branches to a given label block.
5407 static void gen_ijmp_branches(ir_node *block) {
5409 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5410 add_immBlock_pred(block, ijmp);
5415 * Create code for a function.
5417 static void create_function(declaration_t *declaration)
5419 ir_entity *function_entity = get_function_entity(declaration);
5421 if (declaration->init.statement == NULL)
5424 if (declaration->modifiers & DM_CONSTRUCTOR) {
5425 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5426 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5428 if (declaration->modifiers & DM_DESTRUCTOR) {
5429 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5430 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5433 current_function_decl = declaration;
5434 current_function_name = NULL;
5435 current_funcsig = NULL;
5437 assert(all_labels == NULL);
5438 all_labels = NEW_ARR_F(declaration_t *, 0);
5441 int n_local_vars = get_function_n_local_vars(declaration);
5442 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5444 ir_graph *old_current_function = current_function;
5445 current_function = irg;
5447 set_irg_fp_model(irg, firm_opt.fp_model);
5448 tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5449 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5451 ir_node *first_block = get_cur_block();
5453 /* set inline flags */
5454 if (declaration->is_inline)
5455 set_irg_inline_property(irg, irg_inline_recomended);
5456 handle_decl_modifier_irg(irg, declaration->modifiers);
5458 next_value_number_function = 0;
5459 initialize_function_parameters(declaration);
5461 statement_to_firm(declaration->init.statement);
5463 ir_node *end_block = get_irg_end_block(irg);
5465 /* do we have a return statement yet? */
5466 if (get_cur_block() != NULL) {
5467 type_t *type = skip_typeref(declaration->type);
5468 assert(is_type_function(type));
5469 const function_type_t *func_type = &type->function;
5470 const type_t *return_type
5471 = skip_typeref(func_type->return_type);
5474 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5475 ret = new_Return(get_store(), 0, NULL);
5478 if (is_type_scalar(return_type)) {
5479 mode = get_ir_mode(func_type->return_type);
5485 /* ยง5.1.2.2.3 main implicitly returns 0 */
5486 if (strcmp(declaration->symbol->string, "main") == 0) {
5487 in[0] = new_Const(mode, get_mode_null(mode));
5489 in[0] = new_Unknown(mode);
5491 ret = new_Return(get_store(), 1, in);
5493 add_immBlock_pred(end_block, ret);
5496 bool has_computed_gotos = false;
5497 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5498 declaration_t *label = all_labels[i];
5499 if (label->address_taken) {
5500 gen_ijmp_branches(label->v.block);
5501 has_computed_gotos = true;
5503 mature_immBlock(label->v.block);
5505 if (has_computed_gotos) {
5506 /* if we have computed goto's in the function, we cannot inline it */
5507 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5508 warningf(&declaration->source_position,
5509 "function '%Y' can never be inlined because it contains a computed goto",
5510 declaration->symbol);
5512 set_irg_inline_property(irg, irg_inline_forbidden);
5515 DEL_ARR_F(all_labels);
5518 mature_immBlock(first_block);
5519 mature_immBlock(end_block);
5521 irg_finalize_cons(irg);
5523 /* finalize the frame type */
5524 ir_type *frame_type = get_irg_frame_type(irg);
5525 int n = get_compound_n_members(frame_type);
5528 for(int i = 0; i < n; ++i) {
5529 ir_entity *entity = get_compound_member(frame_type, i);
5530 ir_type *entity_type = get_entity_type(entity);
5532 int align = get_type_alignment_bytes(entity_type);
5533 if (align > align_all)
5537 misalign = offset % align;
5539 offset += align - misalign;
5543 set_entity_offset(entity, offset);
5544 offset += get_type_size_bytes(entity_type);
5546 set_type_size_bytes(frame_type, offset);
5547 set_type_alignment_bytes(frame_type, align_all);
5550 current_function = old_current_function;
5553 static void scope_to_firm(scope_t *scope)
5555 /* first pass: create declarations */
5556 declaration_t *declaration = scope->declarations;
5557 for( ; declaration != NULL; declaration = declaration->next) {
5558 if (declaration->namespc != NAMESPACE_NORMAL)
5560 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5561 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5563 if (declaration->symbol == NULL)
5566 type_t *type = skip_typeref(declaration->type);
5567 if (is_type_function(type)) {
5568 get_function_entity(declaration);
5570 create_global_variable(declaration);
5574 /* second pass: create code/initializers */
5575 declaration = scope->declarations;
5576 for( ; declaration != NULL; declaration = declaration->next) {
5577 if (declaration->namespc != NAMESPACE_NORMAL)
5579 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5580 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5582 if (declaration->symbol == NULL)
5585 type_t *type = declaration->type;
5586 if (type->kind == TYPE_FUNCTION) {
5587 create_function(declaration);
5588 declaration_t *inner;
5589 for (inner = next_inner_function(); inner != NULL;
5590 inner = next_inner_function())
5591 create_function(inner);
5593 assert(declaration->declaration_kind
5594 == DECLARATION_KIND_GLOBAL_VARIABLE);
5595 current_ir_graph = get_const_code_irg();
5596 create_declaration_initializer(declaration);
5601 static void set_be_option(const char *option)
5603 int res = firm_be_option(option);
5607 void init_ast2firm(void)
5609 obstack_init(&asm_obst);
5610 init_atomic_modes();
5612 id_underscore = new_id_from_chars("_", 1);
5613 id_imp = new_id_from_chars("__imp_", 6);
5615 /* OS option must be set to the backend */
5616 switch (firm_opt.os_support) {
5617 case OS_SUPPORT_MINGW:
5618 create_ld_ident = create_ld_ident_win32;
5619 set_be_option("ia32-gasmode=mingw");
5621 case OS_SUPPORT_LINUX:
5622 create_ld_ident = create_ld_ident_linux_elf;
5623 set_be_option("ia32-gasmode=elf");
5625 case OS_SUPPORT_MACHO:
5626 create_ld_ident = create_ld_ident_macho;
5627 set_be_option("ia32-gasmode=macho");
5628 set_be_option("ia32-stackalign=4");
5629 set_be_option("pic");
5633 /* create idents for all known runtime functions */
5634 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5635 rts_idents[i] = new_id_from_str(rts_data[i].name);
5638 entitymap_init(&entitymap);
5641 static void init_ir_types(void)
5643 static int ir_types_initialized = 0;
5644 if (ir_types_initialized)
5646 ir_types_initialized = 1;
5648 ir_type_int = get_ir_type(type_int);
5649 ir_type_const_char = get_ir_type(type_const_char);
5650 ir_type_wchar_t = get_ir_type(type_wchar_t);
5651 ir_type_void = get_ir_type(type_void);
5654 void exit_ast2firm(void)
5656 entitymap_destroy(&entitymap);
5657 obstack_free(&asm_obst, NULL);
5660 static void global_asm_to_firm(statement_t *s)
5662 for (; s != NULL; s = s->base.next) {
5663 assert(s->kind == STATEMENT_ASM);
5665 char const *const text = s->asms.asm_text.begin;
5666 size_t size = s->asms.asm_text.size;
5668 /* skip the last \0 */
5669 if (text[size - 1] == '\0')
5672 ident *const id = new_id_from_chars(text, size);
5677 void translation_unit_to_firm(translation_unit_t *unit)
5679 /* just to be sure */
5680 continue_label = NULL;
5682 current_switch_cond = NULL;
5686 scope_to_firm(&unit->scope);
5687 global_asm_to_firm(unit->global_asm);
5689 current_ir_graph = NULL;