2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
42 #include "diagnostic.h"
43 #include "lang_features.h"
45 #include "type_hash.h"
47 #include "walk_statements.h"
49 #include "entitymap_t.h"
50 #include "driver/firm_opt.h"
51 #include "driver/firm_cmdline.h"
53 static ir_type *ir_type_const_char;
54 static ir_type *ir_type_wchar_t;
55 static ir_type *ir_type_void;
56 static ir_type *ir_type_int;
58 /* architecture specific floating point arithmetic mode (if any) */
59 static ir_mode *mode_float_arithmetic;
61 static int next_value_number_function;
62 static ir_node *continue_label;
63 static ir_node *break_label;
64 static ir_node *current_switch_cond;
65 static bool saw_default_label;
66 static label_t **all_labels;
67 static entity_t **inner_functions;
68 static ir_node *ijmp_list;
69 static bool constant_folding;
71 extern bool have_const_functions;
73 static const entity_t *current_function_entity;
74 static ir_node *current_function_name;
75 static ir_node *current_funcsig;
76 static switch_statement_t *current_switch;
77 static ir_graph *current_function;
78 static translation_unit_t *current_translation_unit;
80 static entitymap_t entitymap;
82 static struct obstack asm_obst;
84 typedef enum declaration_kind_t {
85 DECLARATION_KIND_UNKNOWN,
86 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
87 DECLARATION_KIND_GLOBAL_VARIABLE,
88 DECLARATION_KIND_LOCAL_VARIABLE,
89 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
90 DECLARATION_KIND_PARAMETER,
91 DECLARATION_KIND_PARAMETER_ENTITY,
92 DECLARATION_KIND_FUNCTION,
93 DECLARATION_KIND_COMPOUND_MEMBER,
94 DECLARATION_KIND_INNER_FUNCTION
97 static ir_mode *get_ir_mode_storage(type_t *type);
99 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
100 * int that it returns bigger modes for floating point on some platforms
101 * (x87 internally does arithemtic with 80bits)
103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
105 static ir_type *get_ir_type_incomplete(type_t *type);
107 static void enqueue_inner_function(entity_t *entity)
109 ARR_APP1(entity_t*, inner_functions, entity);
112 static entity_t *next_inner_function(void)
114 int len = ARR_LEN(inner_functions);
118 entity_t *entity = inner_functions[len-1];
119 ARR_SHRINKLEN(inner_functions, len-1);
124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
126 const entity_t *entity = get_irg_loc_description(irg, pos);
128 if (entity != NULL) {
129 warningf(&entity->base.source_position,
130 "%s '%#T' might be used uninitialized",
131 get_entity_kind_name(entity->kind),
132 entity->declaration.type, entity->base.symbol);
134 return new_r_Unknown(irg, mode);
137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
139 const source_position_t *pos = (const source_position_t*) dbg;
142 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
148 const source_position_t *pos = (const source_position_t*) dbg;
153 return pos->input_name;
156 static dbg_info *get_dbg_info(const source_position_t *pos)
158 return (dbg_info*) pos;
161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
163 static ir_mode *mode_int, *mode_uint;
165 static ir_node *_expression_to_firm(const expression_t *expression);
166 static ir_node *expression_to_firm(const expression_t *expression);
167 static void create_local_declaration(entity_t *entity);
169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
171 unsigned flags = get_atomic_type_flags(kind);
172 unsigned size = get_atomic_type_size(kind);
173 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
174 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
177 unsigned bit_size = size * 8;
178 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
179 unsigned modulo_shift;
180 ir_mode_arithmetic arithmetic;
182 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
183 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
184 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
186 sort = irms_int_number;
187 arithmetic = irma_twos_complement;
188 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
190 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
191 snprintf(name, sizeof(name), "F%u", bit_size);
192 sort = irms_float_number;
193 arithmetic = irma_ieee754;
196 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
204 * Initialises the atomic modes depending on the machine size.
206 static void init_atomic_modes(void)
208 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
209 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
211 mode_int = atomic_modes[ATOMIC_TYPE_INT];
212 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
214 /* there's no real void type in firm */
215 atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
217 /* initialize pointer modes */
219 ir_mode_sort sort = irms_reference;
220 unsigned bit_size = machine_size;
222 ir_mode_arithmetic arithmetic = irma_twos_complement;
223 unsigned modulo_shift
224 = bit_size < machine_size ? machine_size : bit_size;
226 snprintf(name, sizeof(name), "p%u", machine_size);
227 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
230 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
231 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
233 /* Hmm, pointers should be machine size */
234 set_modeP_data(ptr_mode);
235 set_modeP_code(ptr_mode);
238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
240 assert(kind <= ATOMIC_TYPE_LAST);
241 return atomic_modes[kind];
244 static ir_node *get_vla_size(array_type_t *const type)
246 ir_node *size_node = type->size_node;
247 if (size_node == NULL) {
248 size_node = expression_to_firm(type->size_expression);
249 type->size_node = size_node;
254 static ir_node *get_type_size(type_t *type)
256 type = skip_typeref(type);
258 if (is_type_array(type) && type->array.is_vla) {
259 ir_node *size_node = get_vla_size(&type->array);
260 ir_node *elem_size = get_type_size(type->array.element_type);
261 ir_mode *mode = get_irn_mode(size_node);
262 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
266 ir_mode *mode = get_ir_mode_storage(type_size_t);
268 sym.type_p = get_ir_type(type);
269 return new_SymConst(mode, sym, symconst_type_size);
272 static unsigned count_parameters(const function_type_t *function_type)
276 function_parameter_t *parameter = function_type->parameters;
277 for ( ; parameter != NULL; parameter = parameter->next) {
284 static type_t *get_aligned_type(type_t *type, int alignment)
289 type = skip_typeref(type);
290 if (alignment > type->base.alignment) {
291 type_t *copy = duplicate_type(type);
292 copy->base.alignment = alignment;
293 type = identify_new_type(copy);
299 * Creates a Firm type for an atomic type
301 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
303 ir_mode *mode = atomic_modes[akind];
304 ident *id = get_mode_ident(mode);
305 ir_type *irtype = new_type_primitive(id, mode);
307 set_type_alignment_bytes(irtype, alignment);
313 * Creates a Firm type for a complex type
315 static ir_type *create_complex_type(const complex_type_t *type)
317 atomic_type_kind_t kind = type->akind;
318 ir_mode *mode = atomic_modes[kind];
319 ident *id = get_mode_ident(mode);
323 /* FIXME: finish the array */
328 * Creates a Firm type for an imaginary type
330 static ir_type *create_imaginary_type(const imaginary_type_t *type)
332 atomic_type_kind_t kind = type->akind;
333 ir_mode *mode = atomic_modes[kind];
334 ident *id = get_mode_ident(mode);
335 ir_type *irtype = new_type_primitive(id, mode);
337 set_type_alignment_bytes(irtype, type->base.alignment);
343 * return type of a parameter (and take transparent union gnu extension into
346 static type_t *get_parameter_type(type_t *type)
348 type = skip_typeref(type);
349 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
350 compound_t *compound = type->compound.compound;
351 type = compound->members.entities->declaration.type;
357 static ir_type *create_method_type(const function_type_t *function_type)
359 type_t *return_type = skip_typeref(function_type->return_type);
361 ident *id = id_unique("functiontype.%u");
362 int n_parameters = count_parameters(function_type);
363 int n_results = return_type == type_void ? 0 : 1;
364 ir_type *irtype = new_type_method(id, n_parameters, n_results);
366 if (return_type != type_void) {
367 ir_type *restype = get_ir_type(return_type);
368 set_method_res_type(irtype, 0, restype);
371 function_parameter_t *parameter = function_type->parameters;
373 for ( ; parameter != NULL; parameter = parameter->next) {
374 type_t *type = get_parameter_type(parameter->type);
375 ir_type *p_irtype = get_ir_type(type);
376 set_method_param_type(irtype, n, p_irtype);
380 if (function_type->variadic || function_type->unspecified_parameters) {
381 set_method_variadicity(irtype, variadicity_variadic);
384 unsigned cc = get_method_calling_convention(irtype);
385 switch (function_type->calling_convention) {
386 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
389 set_method_calling_convention(irtype, SET_CDECL(cc));
393 if (function_type->variadic || function_type->unspecified_parameters)
396 /* only non-variadic function can use stdcall, else use cdecl */
397 set_method_calling_convention(irtype, SET_STDCALL(cc));
401 if (function_type->variadic || function_type->unspecified_parameters)
403 /* only non-variadic function can use fastcall, else use cdecl */
404 set_method_calling_convention(irtype, SET_FASTCALL(cc));
408 /* Hmm, leave default, not accepted by the parser yet. */
415 static ir_type *create_pointer_type(pointer_type_t *type)
417 type_t *points_to = type->points_to;
418 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
419 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
420 ir_points_to, mode_P_data);
425 static ir_type *create_reference_type(reference_type_t *type)
427 type_t *refers_to = type->refers_to;
428 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
429 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
430 ir_refers_to, mode_P_data);
435 static ir_type *create_array_type(array_type_t *type)
437 type_t *element_type = type->element_type;
438 ir_type *ir_element_type = get_ir_type(element_type);
440 ident *id = id_unique("array.%u");
441 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
443 const int align = get_type_alignment_bytes(ir_element_type);
444 set_type_alignment_bytes(ir_type, align);
446 if (type->size_constant) {
447 int n_elements = type->size;
449 set_array_bounds_int(ir_type, 0, 0, n_elements);
451 size_t elemsize = get_type_size_bytes(ir_element_type);
452 if (elemsize % align > 0) {
453 elemsize += align - (elemsize % align);
455 set_type_size_bytes(ir_type, n_elements * elemsize);
457 set_array_lower_bound_int(ir_type, 0, 0);
459 set_type_state(ir_type, layout_fixed);
465 * Return the signed integer type of size bits.
467 * @param size the size
469 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
472 static ir_mode *s_modes[64 + 1] = {NULL, };
476 if (size <= 0 || size > 64)
479 mode = s_modes[size];
483 snprintf(name, sizeof(name), "bf_I%u", size);
484 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
485 size <= 32 ? 32 : size );
486 s_modes[size] = mode;
490 snprintf(name, sizeof(name), "I%u", size);
491 ident *id = new_id_from_str(name);
492 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
493 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
494 set_primitive_base_type(res, base_tp);
500 * Return the unsigned integer type of size bits.
502 * @param size the size
504 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
507 static ir_mode *u_modes[64 + 1] = {NULL, };
511 if (size <= 0 || size > 64)
514 mode = u_modes[size];
518 snprintf(name, sizeof(name), "bf_U%u", size);
519 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
520 size <= 32 ? 32 : size );
521 u_modes[size] = mode;
526 snprintf(name, sizeof(name), "U%u", size);
527 ident *id = new_id_from_str(name);
528 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
529 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
530 set_primitive_base_type(res, base_tp);
535 static ir_type *create_bitfield_type(bitfield_type_t *const type)
537 type_t *base = skip_typeref(type->base_type);
538 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
539 ir_type *irbase = get_ir_type(base);
541 unsigned size = type->bit_size;
543 assert(!is_type_float(base));
544 if (is_type_signed(base)) {
545 return get_signed_int_type_for_bit_size(irbase, size);
547 return get_unsigned_int_type_for_bit_size(irbase, size);
551 #define INVALID_TYPE ((ir_type_ptr)-1)
554 COMPOUND_IS_STRUCT = false,
555 COMPOUND_IS_UNION = true
559 * Construct firm type from ast struct type.
561 * As anonymous inner structs get flattened to a single firm type, we might get
562 * irtype, outer_offset and out_align passed (they represent the position of
563 * the anonymous inner struct inside the resulting firm struct)
565 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
566 size_t *outer_offset, size_t *outer_align,
567 bool incomplete, bool is_union)
569 compound_t *compound = type->compound;
571 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
572 return compound->irtype;
575 size_t align_all = 1;
577 size_t bit_offset = 0;
580 if (irtype == NULL) {
581 symbol_t *symbol = compound->base.symbol;
583 if (symbol != NULL) {
584 id = new_id_from_str(symbol->string);
587 id = id_unique("__anonymous_union.%u");
589 id = id_unique("__anonymous_struct.%u");
592 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
595 irtype = new_d_type_union(id, dbgi);
597 irtype = new_d_type_struct(id, dbgi);
600 compound->irtype_complete = false;
601 compound->irtype = irtype;
603 offset = *outer_offset;
604 align_all = *outer_align;
610 compound->irtype_complete = true;
612 entity_t *entry = compound->members.entities;
613 for ( ; entry != NULL; entry = entry->base.next) {
614 if (entry->kind != ENTITY_COMPOUND_MEMBER)
617 size_t prev_offset = offset;
619 symbol_t *symbol = entry->base.symbol;
620 type_t *entry_type = skip_typeref(entry->declaration.type);
622 = get_aligned_type(entry_type, entry->compound_member.alignment);
623 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
626 if (symbol != NULL) {
627 ident = new_id_from_str(symbol->string);
629 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
630 create_compound_type(&entry_type->compound, irtype, &offset,
631 &align_all, false, COMPOUND_IS_STRUCT);
632 goto finished_member;
633 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
634 create_compound_type(&entry_type->compound, irtype, &offset,
635 &align_all, false, COMPOUND_IS_UNION);
636 goto finished_member;
638 assert(entry_type->kind == TYPE_BITFIELD);
640 ident = id_unique("anon.%u");
643 ir_type *base_irtype;
644 if (entry_type->kind == TYPE_BITFIELD) {
645 base_irtype = get_ir_type(entry_type->bitfield.base_type);
647 base_irtype = get_ir_type(entry_type);
650 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
651 size_t misalign = offset % entry_alignment;
653 ir_type *entry_irtype = get_ir_type(entry_type);
654 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
657 size_t bits_remainder;
658 if (entry_type->kind == TYPE_BITFIELD) {
659 size_t size_bits = entry_type->bitfield.bit_size;
660 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
662 if (size_bits > rest_size_bits) {
663 /* start a new bucket */
664 offset += entry_alignment - misalign;
670 /* put into current bucket */
671 base = offset - misalign;
672 bits_remainder = misalign * 8 + bit_offset;
675 offset += size_bits / 8;
676 bit_offset = bit_offset + (size_bits % 8);
678 size_t entry_size = get_type_size_bytes(base_irtype);
679 if (misalign > 0 || bit_offset > 0)
680 offset += entry_alignment - misalign;
684 offset += entry_size;
688 if (entry_alignment > align_all) {
689 if (entry_alignment % align_all != 0) {
690 panic("uneven alignments not supported yet");
692 align_all = entry_alignment;
695 set_entity_offset(entity, base);
696 set_entity_offset_bits_remainder(entity,
697 (unsigned char) bits_remainder);
698 //add_struct_member(irtype, entity);
699 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
700 assert(entry->compound_member.entity == NULL);
701 entry->compound_member.entity = entity;
705 size_t entry_size = offset - prev_offset;
706 if (entry_size > size) {
718 size_t misalign = offset % align_all;
719 if (misalign > 0 || bit_offset > 0) {
720 size += align_all - misalign;
723 if (outer_offset != NULL) {
725 *outer_offset = offset;
727 *outer_offset += size;
730 if (align_all > *outer_align) {
731 if (align_all % *outer_align != 0) {
732 panic("uneven alignments not supported yet");
734 *outer_align = align_all;
737 set_type_alignment_bytes(irtype, align_all);
738 set_type_size_bytes(irtype, size);
739 set_type_state(irtype, layout_fixed);
745 static ir_type *create_enum_type(enum_type_t *const type)
747 type->base.firm_type = ir_type_int;
749 ir_mode *const mode = mode_int;
750 tarval *const one = get_mode_one(mode);
751 tarval * tv_next = get_tarval_null(mode);
753 bool constant_folding_old = constant_folding;
754 constant_folding = true;
756 enum_t *enume = type->enume;
757 entity_t *entry = enume->base.next;
758 for (; entry != NULL; entry = entry->base.next) {
759 if (entry->kind != ENTITY_ENUM_VALUE)
762 expression_t *const init = entry->enum_value.value;
764 ir_node *const cnst = expression_to_firm(init);
765 if (!is_Const(cnst)) {
766 panic("couldn't fold constant");
768 tv_next = get_Const_tarval(cnst);
770 entry->enum_value.tv = tv_next;
771 tv_next = tarval_add(tv_next, one);
774 constant_folding = constant_folding_old;
776 return create_atomic_type(type->akind, type->base.alignment);
779 static ir_type *get_ir_type_incomplete(type_t *type)
781 assert(type != NULL);
782 type = skip_typeref(type);
784 if (type->base.firm_type != NULL) {
785 assert(type->base.firm_type != INVALID_TYPE);
786 return type->base.firm_type;
789 switch (type->kind) {
790 case TYPE_COMPOUND_STRUCT:
791 return create_compound_type(&type->compound, NULL, NULL, NULL,
792 true, COMPOUND_IS_STRUCT);
793 case TYPE_COMPOUND_UNION:
794 return create_compound_type(&type->compound, NULL, NULL, NULL,
795 true, COMPOUND_IS_UNION);
797 return get_ir_type(type);
801 ir_type *get_ir_type(type_t *type)
803 assert(type != NULL);
805 type = skip_typeref(type);
807 if (type->base.firm_type != NULL) {
808 assert(type->base.firm_type != INVALID_TYPE);
809 return type->base.firm_type;
812 ir_type *firm_type = NULL;
813 switch (type->kind) {
815 /* Happens while constant folding, when there was an error */
816 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
819 firm_type = create_atomic_type(type->atomic.akind,
820 type->base.alignment);
823 firm_type = create_complex_type(&type->complex);
826 firm_type = create_imaginary_type(&type->imaginary);
829 firm_type = create_method_type(&type->function);
832 firm_type = create_pointer_type(&type->pointer);
835 firm_type = create_reference_type(&type->reference);
838 firm_type = create_array_type(&type->array);
840 case TYPE_COMPOUND_STRUCT:
841 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
842 false, COMPOUND_IS_STRUCT);
844 case TYPE_COMPOUND_UNION:
845 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
846 false, COMPOUND_IS_UNION);
849 firm_type = create_enum_type(&type->enumt);
852 firm_type = get_ir_type(type->builtin.real_type);
855 firm_type = create_bitfield_type(&type->bitfield);
863 if (firm_type == NULL)
864 panic("unknown type found");
866 type->base.firm_type = firm_type;
870 static ir_mode *get_ir_mode_storage(type_t *type)
872 ir_type *irtype = get_ir_type(type);
874 /* firm doesn't report a mode for arrays somehow... */
875 if (is_Array_type(irtype)) {
879 ir_mode *mode = get_type_mode(irtype);
880 assert(mode != NULL);
884 static ir_mode *get_ir_mode_arithmetic(type_t *type)
886 ir_mode *mode = get_ir_mode_storage(type);
887 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
888 return mode_float_arithmetic;
894 /** Names of the runtime functions. */
895 static const struct {
896 int id; /**< the rts id */
897 int n_res; /**< number of return values */
898 const char *name; /**< the name of the rts function */
899 int n_params; /**< number of parameters */
900 unsigned flags; /**< language flags */
902 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
903 { rts_abort, 0, "abort", 0, _C89 },
904 { rts_alloca, 1, "alloca", 1, _ALL },
905 { rts_abs, 1, "abs", 1, _C89 },
906 { rts_labs, 1, "labs", 1, _C89 },
907 { rts_llabs, 1, "llabs", 1, _C99 },
908 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
910 { rts_fabs, 1, "fabs", 1, _C89 },
911 { rts_sqrt, 1, "sqrt", 1, _C89 },
912 { rts_cbrt, 1, "cbrt", 1, _C99 },
913 { rts_exp, 1, "exp", 1, _C89 },
914 { rts_exp2, 1, "exp2", 1, _C89 },
915 { rts_exp10, 1, "exp10", 1, _GNUC },
916 { rts_log, 1, "log", 1, _C89 },
917 { rts_log2, 1, "log2", 1, _C89 },
918 { rts_log10, 1, "log10", 1, _C89 },
919 { rts_pow, 1, "pow", 2, _C89 },
920 { rts_sin, 1, "sin", 1, _C89 },
921 { rts_cos, 1, "cos", 1, _C89 },
922 { rts_tan, 1, "tan", 1, _C89 },
923 { rts_asin, 1, "asin", 1, _C89 },
924 { rts_acos, 1, "acos", 1, _C89 },
925 { rts_atan, 1, "atan", 1, _C89 },
926 { rts_sinh, 1, "sinh", 1, _C89 },
927 { rts_cosh, 1, "cosh", 1, _C89 },
928 { rts_tanh, 1, "tanh", 1, _C89 },
930 { rts_fabsf, 1, "fabsf", 1, _C99 },
931 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
932 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
933 { rts_expf, 1, "expf", 1, _C99 },
934 { rts_exp2f, 1, "exp2f", 1, _C99 },
935 { rts_exp10f, 1, "exp10f", 1, _GNUC },
936 { rts_logf, 1, "logf", 1, _C99 },
937 { rts_log2f, 1, "log2f", 1, _C99 },
938 { rts_log10f, 1, "log10f", 1, _C99 },
939 { rts_powf, 1, "powf", 2, _C99 },
940 { rts_sinf, 1, "sinf", 1, _C99 },
941 { rts_cosf, 1, "cosf", 1, _C99 },
942 { rts_tanf, 1, "tanf", 1, _C99 },
943 { rts_asinf, 1, "asinf", 1, _C99 },
944 { rts_acosf, 1, "acosf", 1, _C99 },
945 { rts_atanf, 1, "atanf", 1, _C99 },
946 { rts_sinhf, 1, "sinhf", 1, _C99 },
947 { rts_coshf, 1, "coshf", 1, _C99 },
948 { rts_tanhf, 1, "tanhf", 1, _C99 },
950 { rts_fabsl, 1, "fabsl", 1, _C99 },
951 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
952 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
953 { rts_expl, 1, "expl", 1, _C99 },
954 { rts_exp2l, 1, "exp2l", 1, _C99 },
955 { rts_exp10l, 1, "exp10l", 1, _GNUC },
956 { rts_logl, 1, "logl", 1, _C99 },
957 { rts_log2l, 1, "log2l", 1, _C99 },
958 { rts_log10l, 1, "log10l", 1, _C99 },
959 { rts_powl, 1, "powl", 2, _C99 },
960 { rts_sinl, 1, "sinl", 1, _C99 },
961 { rts_cosl, 1, "cosl", 1, _C99 },
962 { rts_tanl, 1, "tanl", 1, _C99 },
963 { rts_asinl, 1, "asinl", 1, _C99 },
964 { rts_acosl, 1, "acosl", 1, _C99 },
965 { rts_atanl, 1, "atanl", 1, _C99 },
966 { rts_sinhl, 1, "sinhl", 1, _C99 },
967 { rts_coshl, 1, "coshl", 1, _C99 },
968 { rts_tanhl, 1, "tanhl", 1, _C99 },
970 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
971 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
972 { rts_strcmp, 1, "strcmp", 2, _C89 },
973 { rts_strncmp, 1, "strncmp", 3, _C89 }
976 static ident *rts_idents[lengthof(rts_data)];
978 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
981 * Handle GNU attributes for entities
983 * @param ent the entity
984 * @param decl the routine declaration
986 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
988 assert(is_declaration(entity));
989 decl_modifiers_t modifiers = entity->declaration.modifiers;
990 if (modifiers & DM_PURE) {
991 /* TRUE if the declaration includes the GNU
992 __attribute__((pure)) specifier. */
993 set_entity_additional_property(irentity, mtp_property_pure);
995 if (modifiers & DM_CONST) {
996 set_entity_additional_property(irentity, mtp_property_const);
997 have_const_functions = true;
999 if (modifiers & DM_USED) {
1000 /* TRUE if the declaration includes the GNU
1001 __attribute__((used)) specifier. */
1002 set_entity_stickyness(irentity, stickyness_sticky);
1006 static bool is_main(entity_t *entity)
1008 static symbol_t *sym_main = NULL;
1009 if (sym_main == NULL) {
1010 sym_main = symbol_table_insert("main");
1013 if (entity->base.symbol != sym_main)
1015 /* must be in outermost scope */
1016 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1023 * Creates an entity representing a function.
1025 * @param declaration the function declaration
1027 static ir_entity *get_function_entity(entity_t *entity)
1029 assert(entity->kind == ENTITY_FUNCTION);
1030 if (entity->function.entity != NULL) {
1031 return entity->function.entity;
1034 if (is_main(entity)) {
1035 /* force main to C linkage */
1036 type_t *type = entity->declaration.type;
1037 assert(is_type_function(type));
1038 if (type->function.linkage != LINKAGE_C) {
1039 type_t *new_type = duplicate_type(type);
1040 new_type->function.linkage = LINKAGE_C;
1041 type = identify_new_type(new_type);
1042 entity->declaration.type = type;
1046 symbol_t *symbol = entity->base.symbol;
1047 ident *id = new_id_from_str(symbol->string);
1049 ir_type *global_type = get_glob_type();
1050 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1051 bool const has_body = entity->function.statement != NULL;
1053 /* already an entity defined? */
1054 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1055 if (irentity != NULL) {
1056 if (get_entity_visibility(irentity) == visibility_external_allocated
1058 set_entity_visibility(irentity, visibility_external_visible);
1060 goto entity_created;
1063 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1064 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1065 set_entity_ld_ident(irentity, create_ld_ident(entity));
1067 handle_gnu_attributes_ent(irentity, entity);
1069 /* static inline => local
1070 * extern inline => local
1071 * inline without definition => local
1072 * inline with definition => external_visible */
1073 storage_class_tag_t const storage_class
1074 = (storage_class_tag_t) entity->declaration.storage_class;
1075 bool const is_inline = entity->function.is_inline;
1076 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1077 set_entity_visibility(irentity, visibility_external_visible);
1078 } else if (storage_class == STORAGE_CLASS_STATIC ||
1079 (is_inline && has_body)) {
1081 /* this entity was declared, but is defined nowhere */
1082 set_entity_peculiarity(irentity, peculiarity_description);
1084 set_entity_visibility(irentity, visibility_local);
1085 } else if (has_body) {
1086 set_entity_visibility(irentity, visibility_external_visible);
1088 set_entity_visibility(irentity, visibility_external_allocated);
1090 set_entity_allocation(irentity, allocation_static);
1092 /* We should check for file scope here, but as long as we compile C only
1093 this is not needed. */
1094 if (! firm_opt.freestanding) {
1095 /* check for a known runtime function */
1096 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1097 if (id != rts_idents[i])
1100 /* ignore those rts functions not necessary needed for current mode */
1101 if ((c_mode & rts_data[i].flags) == 0)
1103 assert(rts_entities[rts_data[i].id] == NULL);
1104 rts_entities[rts_data[i].id] = irentity;
1108 entitymap_insert(&entitymap, symbol, irentity);
1111 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1112 entity->function.entity = irentity;
1117 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1119 ir_mode *value_mode = get_irn_mode(value);
1121 if (value_mode == dest_mode || is_Bad(value))
1124 if (dest_mode == mode_b) {
1125 ir_node *zero = new_Const(get_mode_null(value_mode));
1126 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1127 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1131 return new_d_Conv(dbgi, value, dest_mode);
1135 * Creates a Const node representing a constant.
1137 static ir_node *const_to_firm(const const_expression_t *cnst)
1139 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1140 type_t *type = skip_typeref(cnst->base.type);
1141 ir_mode *mode = get_ir_mode_storage(type);
1146 if (mode_is_float(mode)) {
1147 tv = new_tarval_from_double(cnst->v.float_value, mode);
1149 if (mode_is_signed(mode)) {
1150 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1152 len = snprintf(buf, sizeof(buf), "%llu",
1153 (unsigned long long) cnst->v.int_value);
1155 tv = new_tarval_from_str(buf, len, mode);
1158 ir_node *res = new_d_Const(dbgi, tv);
1159 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1160 return create_conv(dbgi, res, mode_arith);
1164 * Creates a Const node representing a character constant.
1166 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1168 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1169 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1172 size_t const size = cnst->v.character.size;
1173 if (size == 1 && char_is_signed) {
1174 v = (signed char)cnst->v.character.begin[0];
1177 for (size_t i = 0; i < size; ++i) {
1178 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1182 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1183 tarval *tv = new_tarval_from_str(buf, len, mode);
1185 return new_d_Const(dbgi, tv);
1189 * Creates a Const node representing a wide character constant.
1191 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1193 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1194 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1196 long long int v = cnst->v.wide_character.begin[0];
1199 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1200 tarval *tv = new_tarval_from_str(buf, len, mode);
1202 return new_d_Const(dbgi, tv);
1206 * Creates a SymConst for a given entity.
1208 * @param dbgi debug info
1209 * @param mode the (reference) mode for the SymConst
1210 * @param entity the entity
1212 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1215 assert(entity != NULL);
1216 union symconst_symbol sym;
1217 sym.entity_p = entity;
1218 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1222 * Creates a SymConst node representing a string constant.
1224 * @param src_pos the source position of the string constant
1225 * @param id_prefix a prefix for the name of the generated string constant
1226 * @param value the value of the string constant
1228 static ir_node *string_to_firm(const source_position_t *const src_pos,
1229 const char *const id_prefix,
1230 const string_t *const value)
1232 ir_type *const global_type = get_glob_type();
1233 dbg_info *const dbgi = get_dbg_info(src_pos);
1234 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1235 ir_type_const_char, dbgi);
1237 ident *const id = id_unique(id_prefix);
1238 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1239 set_entity_ld_ident(entity, id);
1240 set_entity_variability(entity, variability_constant);
1241 set_entity_allocation(entity, allocation_static);
1243 ir_type *const elem_type = ir_type_const_char;
1244 ir_mode *const mode = get_type_mode(elem_type);
1246 const char* const string = value->begin;
1247 const size_t slen = value->size;
1249 set_array_lower_bound_int(type, 0, 0);
1250 set_array_upper_bound_int(type, 0, slen);
1251 set_type_size_bytes(type, slen);
1252 set_type_state(type, layout_fixed);
1254 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1255 for (size_t i = 0; i < slen; ++i) {
1256 tvs[i] = new_tarval_from_long(string[i], mode);
1259 set_array_entity_values(entity, tvs, slen);
1262 return create_symconst(dbgi, mode_P_data, entity);
1266 * Creates a SymConst node representing a string literal.
1268 * @param literal the string literal
1270 static ir_node *string_literal_to_firm(
1271 const string_literal_expression_t* literal)
1273 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1278 * Creates a SymConst node representing a wide string literal.
1280 * @param literal the wide string literal
1282 static ir_node *wide_string_literal_to_firm(
1283 const wide_string_literal_expression_t* const literal)
1285 ir_type *const global_type = get_glob_type();
1286 ir_type *const elem_type = ir_type_wchar_t;
1287 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1288 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1291 ident *const id = id_unique("Lstr.%u");
1292 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1293 set_entity_ld_ident(entity, id);
1294 set_entity_variability(entity, variability_constant);
1295 set_entity_allocation(entity, allocation_static);
1297 ir_mode *const mode = get_type_mode(elem_type);
1299 const wchar_rep_t *const string = literal->value.begin;
1300 const size_t slen = literal->value.size;
1302 set_array_lower_bound_int(type, 0, 0);
1303 set_array_upper_bound_int(type, 0, slen);
1304 set_type_size_bytes(type, slen);
1305 set_type_state(type, layout_fixed);
1307 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1308 for (size_t i = 0; i < slen; ++i) {
1309 tvs[i] = new_tarval_from_long(string[i], mode);
1312 set_array_entity_values(entity, tvs, slen);
1315 return create_symconst(dbgi, mode_P_data, entity);
1318 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1319 ir_node *const addr)
1321 ir_type *irtype = get_ir_type(type);
1322 if (is_compound_type(irtype)
1323 || is_Method_type(irtype)
1324 || is_Array_type(irtype)) {
1328 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1329 ? cons_volatile : cons_none;
1330 ir_mode *const mode = get_type_mode(irtype);
1331 ir_node *const memory = get_store();
1332 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1333 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1334 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1336 set_store(load_mem);
1338 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1339 return create_conv(dbgi, load_res, mode_arithmetic);
1343 * Creates a strict Conv if necessary.
1345 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1347 ir_mode *mode = get_irn_mode(node);
1349 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1351 if (!mode_is_float(mode))
1354 /* check if there is already a Conv */
1355 if (is_Conv(node)) {
1356 /* convert it into a strict Conv */
1357 set_Conv_strict(node, 1);
1361 /* otherwise create a new one */
1362 return new_d_strictConv(dbgi, node, mode);
1365 static ir_node *get_global_var_address(dbg_info *const dbgi,
1366 const entity_t *const entity)
1368 assert(entity->kind == ENTITY_VARIABLE);
1369 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1371 ir_entity *const irentity = entity->variable.v.entity;
1372 if (entity->variable.thread_local) {
1373 ir_node *const no_mem = new_NoMem();
1374 ir_node *const tls = get_irg_tls(current_ir_graph);
1375 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1377 return create_symconst(dbgi, mode_P_data, irentity);
1382 * Returns the correct base address depending on whether it is a parameter or a
1383 * normal local variable.
1385 static ir_node *get_local_frame(ir_entity *const ent)
1387 ir_graph *const irg = current_ir_graph;
1388 const ir_type *const owner = get_entity_owner(ent);
1389 if (owner == get_irg_frame_type(irg)) {
1390 return get_irg_frame(irg);
1392 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1393 return get_irg_value_param_base(irg);
1398 * Keep all memory edges of the given block.
1400 static void keep_all_memory(ir_node *block)
1402 ir_node *old = get_cur_block();
1404 set_cur_block(block);
1405 keep_alive(get_store());
1406 /* TODO: keep all memory edges from restricted pointers */
1410 static ir_node *reference_expression_enum_value_to_firm(
1411 const reference_expression_t *ref)
1413 entity_t *entity = ref->entity;
1414 type_t *type = skip_typeref(entity->enum_value.enum_type);
1415 /* make sure the type is constructed */
1416 (void) get_ir_type(type);
1418 return new_Const(entity->enum_value.tv);
1421 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1423 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1424 entity_t *entity = ref->entity;
1425 assert(is_declaration(entity));
1426 type_t *type = skip_typeref(entity->declaration.type);
1428 /* make sure the type is constructed */
1429 (void) get_ir_type(type);
1431 switch ((declaration_kind_t) entity->declaration.kind) {
1432 case DECLARATION_KIND_UNKNOWN:
1435 case DECLARATION_KIND_LOCAL_VARIABLE: {
1436 ir_mode *const mode = get_ir_mode_storage(type);
1437 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1438 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1440 case DECLARATION_KIND_PARAMETER: {
1441 ir_mode *const mode = get_ir_mode_storage(type);
1442 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1443 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1445 case DECLARATION_KIND_FUNCTION: {
1446 ir_mode *const mode = get_ir_mode_storage(type);
1448 if (entity->function.btk != bk_none) {
1449 /* for gcc compatibility we have to produce (dummy) addresses for some
1451 if (warning.other) {
1452 warningf(&ref->base.source_position,
1453 "taking address of builtin '%Y'", ref->entity->base.symbol);
1456 /* simply create a NULL pointer */
1457 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1458 ir_node *res = new_Const_long(mode, 0);
1462 return create_symconst(dbgi, mode, entity->function.entity);
1464 case DECLARATION_KIND_INNER_FUNCTION: {
1465 ir_mode *const mode = get_ir_mode_storage(type);
1466 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1467 /* inner function not using the closure */
1468 return create_symconst(dbgi, mode, entity->function.entity);
1470 /* TODO: need trampoline here */
1471 panic("Trampoline code not implemented");
1472 return create_symconst(dbgi, mode, entity->function.entity);
1475 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1476 ir_node *const addr = get_global_var_address(dbgi, entity);
1477 return deref_address(dbgi, entity->declaration.type, addr);
1480 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1481 ir_entity *irentity = entity->variable.v.entity;
1482 ir_node *frame = get_local_frame(irentity);
1483 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1484 return deref_address(dbgi, entity->declaration.type, sel);
1486 case DECLARATION_KIND_PARAMETER_ENTITY: {
1487 ir_entity *irentity = entity->parameter.v.entity;
1488 ir_node *frame = get_local_frame(irentity);
1489 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1490 return deref_address(dbgi, entity->declaration.type, sel);
1493 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1494 return entity->variable.v.vla_base;
1496 case DECLARATION_KIND_COMPOUND_MEMBER:
1497 panic("not implemented reference type");
1500 panic("reference to declaration with unknown type found");
1503 static ir_node *reference_addr(const reference_expression_t *ref)
1505 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1506 entity_t *entity = ref->entity;
1507 assert(is_declaration(entity));
1509 switch((declaration_kind_t) entity->declaration.kind) {
1510 case DECLARATION_KIND_UNKNOWN:
1512 case DECLARATION_KIND_PARAMETER:
1513 case DECLARATION_KIND_LOCAL_VARIABLE:
1514 /* you can store to a local variable (so we don't panic but return NULL
1515 * as an indicator for no real address) */
1517 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1518 ir_node *const addr = get_global_var_address(dbgi, entity);
1521 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1522 ir_entity *irentity = entity->variable.v.entity;
1523 ir_node *frame = get_local_frame(irentity);
1524 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1528 case DECLARATION_KIND_PARAMETER_ENTITY: {
1529 ir_entity *irentity = entity->parameter.v.entity;
1530 ir_node *frame = get_local_frame(irentity);
1531 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1536 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1537 return entity->variable.v.vla_base;
1539 case DECLARATION_KIND_FUNCTION: {
1540 type_t *const type = skip_typeref(entity->declaration.type);
1541 ir_mode *const mode = get_ir_mode_storage(type);
1542 return create_symconst(dbgi, mode, entity->function.entity);
1545 case DECLARATION_KIND_INNER_FUNCTION:
1546 case DECLARATION_KIND_COMPOUND_MEMBER:
1547 panic("not implemented reference type");
1550 panic("reference to declaration with unknown type found");
1554 * Generate an unary builtin.
1556 * @param kind the builtin kind to generate
1557 * @param op the operand
1558 * @param function_type the function type for the GNU builtin routine
1559 * @param db debug info
1561 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1564 in[0] = expression_to_firm(op);
1566 ir_type *tp = get_ir_type(function_type);
1567 ir_type *res = get_method_res_type(tp, 0);
1568 ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), kind, 1, in, tp);
1569 set_irn_pinned(irn, op_pin_state_floats);
1570 return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1574 * Generate a pinned unary builtin.
1576 * @param kind the builtin kind to generate
1577 * @param op the operand
1578 * @param function_type the function type for the GNU builtin routine
1579 * @param db debug info
1581 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1584 in[0] = expression_to_firm(op);
1586 ir_type *tp = get_ir_type(function_type);
1587 ir_type *res = get_method_res_type(tp, 0);
1588 ir_node *mem = get_store();
1589 ir_node *irn = new_d_Builtin(db, mem, kind, 1, in, tp);
1590 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1591 return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1596 * Generate an binary-void-return builtin.
1598 * @param kind the builtin kind to generate
1599 * @param op1 the first operand
1600 * @param op2 the second operand
1601 * @param function_type the function type for the GNU builtin routine
1602 * @param db debug info
1604 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1, expression_t *op2,
1605 type_t *function_type, dbg_info *db)
1608 in[0] = expression_to_firm(op1);
1609 in[1] = expression_to_firm(op2);
1611 ir_type *tp = get_ir_type(function_type);
1612 ir_node *mem = get_store();
1613 ir_node *irn = new_d_Builtin(db, mem, kind, 2, in, tp);
1614 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1619 * Transform calls to builtin functions.
1621 static ir_node *process_builtin_call(const call_expression_t *call)
1623 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1625 assert(call->function->kind == EXPR_REFERENCE);
1626 reference_expression_t *builtin = &call->function->reference;
1628 type_t *type = skip_typeref(builtin->base.type);
1629 assert(is_type_pointer(type));
1631 type_t *function_type = skip_typeref(type->pointer.points_to);
1633 switch (builtin->entity->function.btk) {
1634 case bk_gnu_builtin_alloca: {
1635 if (call->arguments == NULL || call->arguments->next != NULL) {
1636 panic("invalid number of parameters on __builtin_alloca");
1638 expression_t *argument = call->arguments->expression;
1639 ir_node *size = expression_to_firm(argument);
1641 ir_node *store = get_store();
1642 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1644 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1646 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1651 case bk_gnu_builtin_huge_val:
1652 case bk_gnu_builtin_inf:
1653 case bk_gnu_builtin_inff:
1654 case bk_gnu_builtin_infl: {
1655 type_t *type = function_type->function.return_type;
1656 ir_mode *mode = get_ir_mode_arithmetic(type);
1657 tarval *tv = get_mode_infinite(mode);
1658 ir_node *res = new_d_Const(dbgi, tv);
1661 case bk_gnu_builtin_nan:
1662 case bk_gnu_builtin_nanf:
1663 case bk_gnu_builtin_nanl: {
1664 /* Ignore string for now... */
1665 assert(is_type_function(function_type));
1666 type_t *type = function_type->function.return_type;
1667 ir_mode *mode = get_ir_mode_arithmetic(type);
1668 tarval *tv = get_mode_NAN(mode);
1669 ir_node *res = new_d_Const(dbgi, tv);
1672 case bk_gnu_builtin_expect: {
1673 expression_t *argument = call->arguments->expression;
1674 return _expression_to_firm(argument);
1676 case bk_gnu_builtin_va_end:
1677 /* evaluate the argument of va_end for its side effects */
1678 _expression_to_firm(call->arguments->expression);
1680 case bk_gnu_builtin_frame_address: {
1681 expression_t *const expression = call->arguments->expression;
1682 long val = fold_constant(expression);
1685 return get_irg_frame(current_ir_graph);
1687 /* get the argument */
1690 in[0] = expression_to_firm(expression);
1691 in[1] = get_irg_frame(current_ir_graph);
1692 ir_type *tp = get_ir_type(function_type);
1693 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_frame_addess, 2, in, tp);
1694 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1697 case bk_gnu_builtin_return_address: {
1698 expression_t *const expression = call->arguments->expression;
1701 in[0] = expression_to_firm(expression);
1702 in[1] = get_irg_frame(current_ir_graph);
1703 ir_type *tp = get_ir_type(function_type);
1704 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1705 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1707 case bk_gnu_builtin_ffs:
1708 return gen_unary_builtin(ir_bk_ffs, call->arguments->expression, function_type, dbgi);
1709 case bk_gnu_builtin_clz:
1710 return gen_unary_builtin(ir_bk_clz, call->arguments->expression, function_type, dbgi);
1711 case bk_gnu_builtin_ctz:
1712 return gen_unary_builtin(ir_bk_ctz, call->arguments->expression, function_type, dbgi);
1713 case bk_gnu_builtin_popcount:
1714 case bk_ms__popcount:
1715 return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1716 case bk_gnu_builtin_parity:
1717 return gen_unary_builtin(ir_bk_parity, call->arguments->expression, function_type, dbgi);
1718 case bk_gnu_builtin_prefetch: {
1719 call_argument_t *const args = call->arguments;
1720 expression_t *const addr = args->expression;
1723 in[0] = _expression_to_firm(addr);
1724 if (args->next != NULL) {
1725 expression_t *const rw = args->next->expression;
1727 in[1] = _expression_to_firm(rw);
1729 if (args->next->next != NULL) {
1730 expression_t *const locality = args->next->next->expression;
1732 in[2] = expression_to_firm(locality);
1734 in[2] = new_Const_long(mode_int, 3);
1737 in[1] = new_Const_long(mode_int, 0);
1738 in[2] = new_Const_long(mode_int, 3);
1740 ir_type *tp = get_ir_type(function_type);
1741 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_prefetch, 3, in, tp);
1742 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1745 case bk_gnu_builtin_trap:
1748 ir_type *tp = get_ir_type(function_type);
1749 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_trap, 0, NULL, tp);
1750 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1753 case bk_ms__debugbreak: {
1754 ir_type *tp = get_ir_type(function_type);
1755 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_debugbreak, 0, NULL, tp);
1756 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1759 case bk_ms_ReturnAddress: {
1762 in[0] = new_Const_long(mode_int, 0);
1763 in[1] = get_irg_frame(current_ir_graph);
1764 ir_type *tp = get_ir_type(function_type);
1765 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1766 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1769 case bk_ms_rotl64: {
1770 ir_node *val = expression_to_firm(call->arguments->expression);
1771 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1772 ir_mode *mode = get_irn_mode(val);
1773 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1776 case bk_ms_rotr64: {
1777 ir_node *val = expression_to_firm(call->arguments->expression);
1778 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1779 ir_mode *mode = get_irn_mode(val);
1780 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1781 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1782 return new_d_Rotl(dbgi, val, sub, mode);
1784 case bk_ms_byteswap_ushort:
1785 case bk_ms_byteswap_ulong:
1786 case bk_ms_byteswap_uint64:
1787 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1790 case bk_ms__indword:
1791 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1792 case bk_ms__outbyte:
1793 case bk_ms__outword:
1794 case bk_ms__outdword:
1795 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1796 call->arguments->next->expression, function_type, dbgi);
1798 panic("unsupported builtin found");
1803 * Transform a call expression.
1804 * Handles some special cases, like alloca() calls, which must be resolved
1805 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1806 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1809 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1811 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1812 assert(get_cur_block() != NULL);
1814 expression_t *function = call->function;
1815 if (function->kind == EXPR_REFERENCE) {
1816 const reference_expression_t *ref = &function->reference;
1817 entity_t *entity = ref->entity;
1819 if (ref->entity->kind == ENTITY_FUNCTION &&
1820 ref->entity->function.btk != bk_none) {
1821 return process_builtin_call(call);
1824 if (entity->kind == ENTITY_FUNCTION
1825 && entity->function.entity == rts_entities[rts_alloca]) {
1826 /* handle alloca() call */
1827 expression_t *argument = call->arguments->expression;
1828 ir_node *size = expression_to_firm(argument);
1829 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1831 size = create_conv(dbgi, size, mode);
1833 ir_node *store = get_store();
1834 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1836 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1838 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1843 ir_node *callee = expression_to_firm(function);
1845 type_t *type = skip_typeref(function->base.type);
1846 assert(is_type_pointer(type));
1847 pointer_type_t *pointer_type = &type->pointer;
1848 type_t *points_to = skip_typeref(pointer_type->points_to);
1849 assert(is_type_function(points_to));
1850 function_type_t *function_type = &points_to->function;
1852 int n_parameters = 0;
1853 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1854 ir_type *new_method_type = NULL;
1855 if (function_type->variadic || function_type->unspecified_parameters) {
1856 const call_argument_t *argument = call->arguments;
1857 for ( ; argument != NULL; argument = argument->next) {
1861 /* we need to construct a new method type matching the call
1863 int n_res = get_method_n_ress(ir_method_type);
1864 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1865 n_parameters, n_res, dbgi);
1866 set_method_calling_convention(new_method_type,
1867 get_method_calling_convention(ir_method_type));
1868 set_method_additional_properties(new_method_type,
1869 get_method_additional_properties(ir_method_type));
1870 set_method_variadicity(new_method_type,
1871 get_method_variadicity(ir_method_type));
1873 for (int i = 0; i < n_res; ++i) {
1874 set_method_res_type(new_method_type, i,
1875 get_method_res_type(ir_method_type, i));
1877 argument = call->arguments;
1878 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1879 expression_t *expression = argument->expression;
1880 ir_type *irtype = get_ir_type(expression->base.type);
1881 set_method_param_type(new_method_type, i, irtype);
1883 ir_method_type = new_method_type;
1885 n_parameters = get_method_n_params(ir_method_type);
1888 ir_node *in[n_parameters];
1890 const call_argument_t *argument = call->arguments;
1891 for (int n = 0; n < n_parameters; ++n) {
1892 expression_t *expression = argument->expression;
1893 ir_node *arg_node = expression_to_firm(expression);
1895 type_t *type = skip_typeref(expression->base.type);
1896 if (!is_type_compound(type)) {
1897 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1898 arg_node = create_conv(dbgi, arg_node, mode);
1899 arg_node = do_strict_conv(dbgi, arg_node);
1904 argument = argument->next;
1907 ir_node *store = get_store();
1908 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1910 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1913 type_t *return_type = skip_typeref(function_type->return_type);
1914 ir_node *result = NULL;
1916 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1917 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1919 if (is_type_scalar(return_type)) {
1920 ir_mode *mode = get_ir_mode_storage(return_type);
1921 result = new_d_Proj(dbgi, resproj, mode, 0);
1922 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1923 result = create_conv(NULL, result, mode_arith);
1925 ir_mode *mode = mode_P_data;
1926 result = new_d_Proj(dbgi, resproj, mode, 0);
1930 if (function->kind == EXPR_REFERENCE &&
1931 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1932 /* A dead end: Keep the Call and the Block. Also place all further
1933 * nodes into a new and unreachable block. */
1935 keep_alive(get_cur_block());
1942 static void statement_to_firm(statement_t *statement);
1943 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1945 static ir_node *expression_to_addr(const expression_t *expression);
1946 static ir_node *create_condition_evaluation(const expression_t *expression,
1947 ir_node *true_block,
1948 ir_node *false_block);
1950 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1953 if (!is_type_compound(type)) {
1954 ir_mode *mode = get_ir_mode_storage(type);
1955 value = create_conv(dbgi, value, mode);
1956 value = do_strict_conv(dbgi, value);
1959 ir_node *memory = get_store();
1961 if (is_type_scalar(type)) {
1962 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1963 ? cons_volatile : cons_none;
1964 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1965 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1966 set_store(store_mem);
1968 ir_type *irtype = get_ir_type(type);
1969 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1970 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1971 set_store(copyb_mem);
1975 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1977 tarval *all_one = get_mode_all_one(mode);
1978 int mode_size = get_mode_size_bits(mode);
1980 assert(offset >= 0);
1982 assert(offset + size <= mode_size);
1983 if (size == mode_size) {
1987 long shiftr = get_mode_size_bits(mode) - size;
1988 long shiftl = offset;
1989 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1990 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1991 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1992 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1997 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1998 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2000 ir_type *entity_type = get_entity_type(entity);
2001 ir_type *base_type = get_primitive_base_type(entity_type);
2002 assert(base_type != NULL);
2003 ir_mode *mode = get_type_mode(base_type);
2005 value = create_conv(dbgi, value, mode);
2007 /* kill upper bits of value and shift to right position */
2008 int bitoffset = get_entity_offset_bits_remainder(entity);
2009 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
2011 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
2012 ir_node *mask_node = new_d_Const(dbgi, mask);
2013 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
2014 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
2015 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
2016 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2018 /* load current value */
2019 ir_node *mem = get_store();
2020 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2021 set_volatile ? cons_volatile : cons_none);
2022 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2023 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2024 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2025 tarval *inv_mask = tarval_not(shift_mask);
2026 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2027 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2029 /* construct new value and store */
2030 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2031 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2032 set_volatile ? cons_volatile : cons_none);
2033 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2034 set_store(store_mem);
2036 return value_masked;
2039 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2042 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2043 type_t *type = expression->base.type;
2044 ir_mode *mode = get_ir_mode_storage(type);
2045 ir_node *mem = get_store();
2046 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2047 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2048 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2050 load_res = create_conv(dbgi, load_res, mode_int);
2052 set_store(load_mem);
2054 /* kill upper bits */
2055 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2056 ir_entity *entity = expression->compound_entry->compound_member.entity;
2057 int bitoffset = get_entity_offset_bits_remainder(entity);
2058 ir_type *entity_type = get_entity_type(entity);
2059 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
2060 long shift_bitsl = machine_size - bitoffset - bitsize;
2061 assert(shift_bitsl >= 0);
2062 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
2063 ir_node *countl = new_d_Const(dbgi, tvl);
2064 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
2066 long shift_bitsr = bitoffset + shift_bitsl;
2067 assert(shift_bitsr <= (long) machine_size);
2068 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
2069 ir_node *countr = new_d_Const(dbgi, tvr);
2071 if (mode_is_signed(mode)) {
2072 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2074 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2077 return create_conv(dbgi, shiftr, mode);
2080 /* make sure the selected compound type is constructed */
2081 static void construct_select_compound(const select_expression_t *expression)
2083 type_t *type = skip_typeref(expression->compound->base.type);
2084 if (is_type_pointer(type)) {
2085 type = type->pointer.points_to;
2087 (void) get_ir_type(type);
2090 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2091 ir_node *value, ir_node *addr)
2093 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2094 type_t *type = skip_typeref(expression->base.type);
2096 if (!is_type_compound(type)) {
2097 ir_mode *mode = get_ir_mode_storage(type);
2098 value = create_conv(dbgi, value, mode);
2099 value = do_strict_conv(dbgi, value);
2102 if (expression->kind == EXPR_REFERENCE) {
2103 const reference_expression_t *ref = &expression->reference;
2105 entity_t *entity = ref->entity;
2106 assert(is_declaration(entity));
2107 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2108 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2109 set_value(entity->variable.v.value_number, value);
2111 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2112 set_value(entity->parameter.v.value_number, value);
2118 addr = expression_to_addr(expression);
2119 assert(addr != NULL);
2121 if (expression->kind == EXPR_SELECT) {
2122 const select_expression_t *select = &expression->select;
2124 construct_select_compound(select);
2126 entity_t *entity = select->compound_entry;
2127 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2128 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2129 ir_entity *irentity = entity->compound_member.entity;
2131 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2132 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2138 assign_value(dbgi, addr, type, value);
2142 static void set_value_for_expression(const expression_t *expression,
2145 set_value_for_expression_addr(expression, value, NULL);
2148 static ir_node *get_value_from_lvalue(const expression_t *expression,
2151 if (expression->kind == EXPR_REFERENCE) {
2152 const reference_expression_t *ref = &expression->reference;
2154 entity_t *entity = ref->entity;
2155 assert(entity->kind == ENTITY_VARIABLE
2156 || entity->kind == ENTITY_PARAMETER);
2157 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2159 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2160 value_number = entity->variable.v.value_number;
2161 assert(addr == NULL);
2162 type_t *type = skip_typeref(expression->base.type);
2163 ir_mode *mode = get_ir_mode_storage(type);
2164 ir_node *res = get_value(value_number, mode);
2165 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2166 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2167 value_number = entity->parameter.v.value_number;
2168 assert(addr == NULL);
2169 type_t *type = skip_typeref(expression->base.type);
2170 ir_mode *mode = get_ir_mode_storage(type);
2171 ir_node *res = get_value(value_number, mode);
2172 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2176 assert(addr != NULL);
2177 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2180 if (expression->kind == EXPR_SELECT &&
2181 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2182 construct_select_compound(&expression->select);
2183 value = bitfield_extract_to_firm(&expression->select, addr);
2185 value = deref_address(dbgi, expression->base.type, addr);
2192 static ir_node *create_incdec(const unary_expression_t *expression)
2194 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2195 const expression_t *value_expr = expression->value;
2196 ir_node *addr = expression_to_addr(value_expr);
2197 ir_node *value = get_value_from_lvalue(value_expr, addr);
2199 type_t *type = skip_typeref(expression->base.type);
2200 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2203 if (is_type_pointer(type)) {
2204 pointer_type_t *pointer_type = &type->pointer;
2205 offset = get_type_size(pointer_type->points_to);
2207 assert(is_type_arithmetic(type));
2208 offset = new_Const(get_mode_one(mode));
2212 ir_node *store_value;
2213 switch(expression->base.kind) {
2214 case EXPR_UNARY_POSTFIX_INCREMENT:
2216 store_value = new_d_Add(dbgi, value, offset, mode);
2218 case EXPR_UNARY_POSTFIX_DECREMENT:
2220 store_value = new_d_Sub(dbgi, value, offset, mode);
2222 case EXPR_UNARY_PREFIX_INCREMENT:
2223 result = new_d_Add(dbgi, value, offset, mode);
2224 store_value = result;
2226 case EXPR_UNARY_PREFIX_DECREMENT:
2227 result = new_d_Sub(dbgi, value, offset, mode);
2228 store_value = result;
2231 panic("no incdec expr in create_incdec");
2234 set_value_for_expression_addr(value_expr, store_value, addr);
2239 static bool is_local_variable(expression_t *expression)
2241 if (expression->kind != EXPR_REFERENCE)
2243 reference_expression_t *ref_expr = &expression->reference;
2244 entity_t *entity = ref_expr->entity;
2245 if (entity->kind != ENTITY_VARIABLE)
2247 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2248 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2251 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2254 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2255 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2256 case EXPR_BINARY_NOTEQUAL:
2257 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2258 case EXPR_BINARY_ISLESS:
2259 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2260 case EXPR_BINARY_ISLESSEQUAL:
2261 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2262 case EXPR_BINARY_ISGREATER:
2263 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2264 case EXPR_BINARY_ISGREATEREQUAL:
2265 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2266 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2271 panic("trying to get pn_Cmp from non-comparison binexpr type");
2275 * Handle the assume optimizer hint: check if a Confirm
2276 * node can be created.
2278 * @param dbi debug info
2279 * @param expr the IL assume expression
2281 * we support here only some simple cases:
2286 static ir_node *handle_assume_compare(dbg_info *dbi,
2287 const binary_expression_t *expression)
2289 expression_t *op1 = expression->left;
2290 expression_t *op2 = expression->right;
2291 entity_t *var2, *var = NULL;
2292 ir_node *res = NULL;
2295 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2297 if (is_local_variable(op1) && is_local_variable(op2)) {
2298 var = op1->reference.entity;
2299 var2 = op2->reference.entity;
2301 type_t *const type = skip_typeref(var->declaration.type);
2302 ir_mode *const mode = get_ir_mode_storage(type);
2304 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2305 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2307 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2308 set_value(var2->variable.v.value_number, res);
2310 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2311 set_value(var->variable.v.value_number, res);
2317 if (is_local_variable(op1) && is_constant_expression(op2)) {
2318 var = op1->reference.entity;
2320 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2321 cmp_val = get_inversed_pnc(cmp_val);
2322 var = op2->reference.entity;
2327 type_t *const type = skip_typeref(var->declaration.type);
2328 ir_mode *const mode = get_ir_mode_storage(type);
2330 res = get_value(var->variable.v.value_number, mode);
2331 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2332 set_value(var->variable.v.value_number, res);
2338 * Handle the assume optimizer hint.
2340 * @param dbi debug info
2341 * @param expr the IL assume expression
2343 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2345 switch(expression->kind) {
2346 case EXPR_BINARY_EQUAL:
2347 case EXPR_BINARY_NOTEQUAL:
2348 case EXPR_BINARY_LESS:
2349 case EXPR_BINARY_LESSEQUAL:
2350 case EXPR_BINARY_GREATER:
2351 case EXPR_BINARY_GREATEREQUAL:
2352 return handle_assume_compare(dbi, &expression->binary);
2358 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2360 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2361 type_t *type = skip_typeref(expression->base.type);
2363 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2364 return expression_to_addr(expression->value);
2366 const expression_t *value = expression->value;
2368 switch(expression->base.kind) {
2369 case EXPR_UNARY_NEGATE: {
2370 ir_node *value_node = expression_to_firm(value);
2371 ir_mode *mode = get_ir_mode_arithmetic(type);
2372 return new_d_Minus(dbgi, value_node, mode);
2374 case EXPR_UNARY_PLUS:
2375 return expression_to_firm(value);
2376 case EXPR_UNARY_BITWISE_NEGATE: {
2377 ir_node *value_node = expression_to_firm(value);
2378 ir_mode *mode = get_ir_mode_arithmetic(type);
2379 return new_d_Not(dbgi, value_node, mode);
2381 case EXPR_UNARY_NOT: {
2382 ir_node *value_node = _expression_to_firm(value);
2383 value_node = create_conv(dbgi, value_node, mode_b);
2384 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2387 case EXPR_UNARY_DEREFERENCE: {
2388 ir_node *value_node = expression_to_firm(value);
2389 type_t *value_type = skip_typeref(value->base.type);
2390 assert(is_type_pointer(value_type));
2391 type_t *points_to = value_type->pointer.points_to;
2392 return deref_address(dbgi, points_to, value_node);
2394 case EXPR_UNARY_POSTFIX_INCREMENT:
2395 case EXPR_UNARY_POSTFIX_DECREMENT:
2396 case EXPR_UNARY_PREFIX_INCREMENT:
2397 case EXPR_UNARY_PREFIX_DECREMENT:
2398 return create_incdec(expression);
2399 case EXPR_UNARY_CAST: {
2400 ir_node *value_node = expression_to_firm(value);
2401 if (is_type_scalar(type)) {
2402 ir_mode *mode = get_ir_mode_storage(type);
2403 ir_node *node = create_conv(dbgi, value_node, mode);
2404 node = do_strict_conv(dbgi, node);
2405 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2406 node = create_conv(dbgi, node, mode_arith);
2409 /* make sure firm type is constructed */
2410 (void) get_ir_type(type);
2414 case EXPR_UNARY_CAST_IMPLICIT: {
2415 ir_node *value_node = expression_to_firm(value);
2416 if (is_type_scalar(type)) {
2417 ir_mode *mode = get_ir_mode_storage(type);
2418 ir_node *res = create_conv(dbgi, value_node, mode);
2419 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2420 res = create_conv(dbgi, res, mode_arith);
2426 case EXPR_UNARY_ASSUME:
2427 if (firm_opt.confirm)
2428 return handle_assume(dbgi, value);
2435 panic("invalid UNEXPR type found");
2439 * produces a 0/1 depending of the value of a mode_b node
2441 static ir_node *produce_condition_result(const expression_t *expression,
2442 ir_mode *mode, dbg_info *dbgi)
2444 ir_node *cur_block = get_cur_block();
2446 ir_node *one_block = new_immBlock();
2447 set_cur_block(one_block);
2448 ir_node *one = new_Const(get_mode_one(mode));
2449 ir_node *jmp_one = new_d_Jmp(dbgi);
2451 ir_node *zero_block = new_immBlock();
2452 set_cur_block(zero_block);
2453 ir_node *zero = new_Const(get_mode_null(mode));
2454 ir_node *jmp_zero = new_d_Jmp(dbgi);
2456 set_cur_block(cur_block);
2457 create_condition_evaluation(expression, one_block, zero_block);
2458 mature_immBlock(one_block);
2459 mature_immBlock(zero_block);
2461 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2462 new_Block(2, in_cf);
2464 ir_node *in[2] = { one, zero };
2465 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2470 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2471 ir_node *value, type_t *type)
2473 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2474 assert(is_type_pointer(type));
2475 pointer_type_t *const pointer_type = &type->pointer;
2476 type_t *const points_to = skip_typeref(pointer_type->points_to);
2477 ir_node * elem_size = get_type_size(points_to);
2478 elem_size = create_conv(dbgi, elem_size, mode);
2479 value = create_conv(dbgi, value, mode);
2480 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2484 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2485 ir_node *left, ir_node *right)
2488 type_t *type_left = skip_typeref(expression->left->base.type);
2489 type_t *type_right = skip_typeref(expression->right->base.type);
2491 expression_kind_t kind = expression->base.kind;
2494 case EXPR_BINARY_SHIFTLEFT:
2495 case EXPR_BINARY_SHIFTRIGHT:
2496 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2497 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2498 mode = get_irn_mode(left);
2499 right = create_conv(dbgi, right, mode_uint);
2502 case EXPR_BINARY_SUB:
2503 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2504 const pointer_type_t *const ptr_type = &type_left->pointer;
2506 mode = get_ir_mode_arithmetic(expression->base.type);
2507 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2508 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2509 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2510 ir_node *const no_mem = new_NoMem();
2511 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2512 mode, op_pin_state_floats);
2513 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2516 case EXPR_BINARY_SUB_ASSIGN:
2517 if (is_type_pointer(type_left)) {
2518 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2519 mode = get_ir_mode_arithmetic(type_left);
2524 case EXPR_BINARY_ADD:
2525 case EXPR_BINARY_ADD_ASSIGN:
2526 if (is_type_pointer(type_left)) {
2527 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2528 mode = get_ir_mode_arithmetic(type_left);
2530 } else if (is_type_pointer(type_right)) {
2531 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2532 mode = get_ir_mode_arithmetic(type_right);
2539 mode = get_ir_mode_arithmetic(type_right);
2540 left = create_conv(dbgi, left, mode);
2545 case EXPR_BINARY_ADD_ASSIGN:
2546 case EXPR_BINARY_ADD:
2547 return new_d_Add(dbgi, left, right, mode);
2548 case EXPR_BINARY_SUB_ASSIGN:
2549 case EXPR_BINARY_SUB:
2550 return new_d_Sub(dbgi, left, right, mode);
2551 case EXPR_BINARY_MUL_ASSIGN:
2552 case EXPR_BINARY_MUL:
2553 return new_d_Mul(dbgi, left, right, mode);
2554 case EXPR_BINARY_BITWISE_AND:
2555 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2556 return new_d_And(dbgi, left, right, mode);
2557 case EXPR_BINARY_BITWISE_OR:
2558 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2559 return new_d_Or(dbgi, left, right, mode);
2560 case EXPR_BINARY_BITWISE_XOR:
2561 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2562 return new_d_Eor(dbgi, left, right, mode);
2563 case EXPR_BINARY_SHIFTLEFT:
2564 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2565 return new_d_Shl(dbgi, left, right, mode);
2566 case EXPR_BINARY_SHIFTRIGHT:
2567 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2568 if (mode_is_signed(mode)) {
2569 return new_d_Shrs(dbgi, left, right, mode);
2571 return new_d_Shr(dbgi, left, right, mode);
2573 case EXPR_BINARY_DIV:
2574 case EXPR_BINARY_DIV_ASSIGN: {
2575 ir_node *pin = new_Pin(new_NoMem());
2578 if (mode_is_float(mode)) {
2579 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2580 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2582 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2583 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2587 case EXPR_BINARY_MOD:
2588 case EXPR_BINARY_MOD_ASSIGN: {
2589 ir_node *pin = new_Pin(new_NoMem());
2590 assert(!mode_is_float(mode));
2591 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2592 op_pin_state_floats);
2593 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2597 panic("unexpected expression kind");
2601 static ir_node *create_lazy_op(const binary_expression_t *expression)
2603 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2604 type_t *type = skip_typeref(expression->base.type);
2605 ir_mode *mode = get_ir_mode_arithmetic(type);
2607 if (is_constant_expression(expression->left)) {
2608 long val = fold_constant(expression->left);
2609 expression_kind_t ekind = expression->base.kind;
2610 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2611 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2613 return new_Const(get_mode_null(mode));
2617 return new_Const(get_mode_one(mode));
2621 if (is_constant_expression(expression->right)) {
2622 long const valr = fold_constant(expression->right);
2624 new_Const(get_mode_one(mode)) :
2625 new_Const(get_mode_null(mode));
2628 return produce_condition_result(expression->right, mode, dbgi);
2631 return produce_condition_result((const expression_t*) expression, mode,
2635 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2636 ir_node *right, ir_mode *mode);
2638 static ir_node *create_assign_binop(const binary_expression_t *expression)
2640 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2641 const expression_t *left_expr = expression->left;
2642 type_t *type = skip_typeref(left_expr->base.type);
2643 ir_mode *left_mode = get_ir_mode_storage(type);
2644 ir_node *right = expression_to_firm(expression->right);
2645 ir_node *left_addr = expression_to_addr(left_expr);
2646 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2647 ir_node *result = create_op(dbgi, expression, left, right);
2649 result = create_conv(dbgi, result, left_mode);
2650 result = do_strict_conv(dbgi, result);
2652 result = set_value_for_expression_addr(left_expr, result, left_addr);
2654 if (!is_type_compound(type)) {
2655 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2656 result = create_conv(dbgi, result, mode_arithmetic);
2661 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2663 expression_kind_t kind = expression->base.kind;
2666 case EXPR_BINARY_EQUAL:
2667 case EXPR_BINARY_NOTEQUAL:
2668 case EXPR_BINARY_LESS:
2669 case EXPR_BINARY_LESSEQUAL:
2670 case EXPR_BINARY_GREATER:
2671 case EXPR_BINARY_GREATEREQUAL:
2672 case EXPR_BINARY_ISGREATER:
2673 case EXPR_BINARY_ISGREATEREQUAL:
2674 case EXPR_BINARY_ISLESS:
2675 case EXPR_BINARY_ISLESSEQUAL:
2676 case EXPR_BINARY_ISLESSGREATER:
2677 case EXPR_BINARY_ISUNORDERED: {
2678 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2679 ir_node *left = expression_to_firm(expression->left);
2680 ir_node *right = expression_to_firm(expression->right);
2681 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2682 long pnc = get_pnc(kind, expression->left->base.type);
2683 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2686 case EXPR_BINARY_ASSIGN: {
2687 ir_node *addr = expression_to_addr(expression->left);
2688 ir_node *right = expression_to_firm(expression->right);
2690 = set_value_for_expression_addr(expression->left, right, addr);
2692 type_t *type = skip_typeref(expression->base.type);
2693 if (!is_type_compound(type)) {
2694 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2695 res = create_conv(NULL, res, mode_arithmetic);
2699 case EXPR_BINARY_ADD:
2700 case EXPR_BINARY_SUB:
2701 case EXPR_BINARY_MUL:
2702 case EXPR_BINARY_DIV:
2703 case EXPR_BINARY_MOD:
2704 case EXPR_BINARY_BITWISE_AND:
2705 case EXPR_BINARY_BITWISE_OR:
2706 case EXPR_BINARY_BITWISE_XOR:
2707 case EXPR_BINARY_SHIFTLEFT:
2708 case EXPR_BINARY_SHIFTRIGHT:
2710 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2711 ir_node *left = expression_to_firm(expression->left);
2712 ir_node *right = expression_to_firm(expression->right);
2713 return create_op(dbgi, expression, left, right);
2715 case EXPR_BINARY_LOGICAL_AND:
2716 case EXPR_BINARY_LOGICAL_OR:
2717 return create_lazy_op(expression);
2718 case EXPR_BINARY_COMMA:
2719 /* create side effects of left side */
2720 (void) expression_to_firm(expression->left);
2721 return _expression_to_firm(expression->right);
2723 case EXPR_BINARY_ADD_ASSIGN:
2724 case EXPR_BINARY_SUB_ASSIGN:
2725 case EXPR_BINARY_MUL_ASSIGN:
2726 case EXPR_BINARY_MOD_ASSIGN:
2727 case EXPR_BINARY_DIV_ASSIGN:
2728 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2729 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2730 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2731 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2732 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2733 return create_assign_binop(expression);
2735 panic("TODO binexpr type");
2739 static ir_node *array_access_addr(const array_access_expression_t *expression)
2741 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2742 ir_node *base_addr = expression_to_firm(expression->array_ref);
2743 ir_node *offset = expression_to_firm(expression->index);
2744 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2745 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2746 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2751 static ir_node *array_access_to_firm(
2752 const array_access_expression_t *expression)
2754 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2755 ir_node *addr = array_access_addr(expression);
2756 type_t *type = revert_automatic_type_conversion(
2757 (const expression_t*) expression);
2758 type = skip_typeref(type);
2760 return deref_address(dbgi, type, addr);
2763 static long get_offsetof_offset(const offsetof_expression_t *expression)
2765 type_t *orig_type = expression->type;
2768 designator_t *designator = expression->designator;
2769 for ( ; designator != NULL; designator = designator->next) {
2770 type_t *type = skip_typeref(orig_type);
2771 /* be sure the type is constructed */
2772 (void) get_ir_type(type);
2774 if (designator->symbol != NULL) {
2775 assert(is_type_compound(type));
2776 symbol_t *symbol = designator->symbol;
2778 compound_t *compound = type->compound.compound;
2779 entity_t *iter = compound->members.entities;
2780 for ( ; iter != NULL; iter = iter->base.next) {
2781 if (iter->base.symbol == symbol) {
2785 assert(iter != NULL);
2787 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2788 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2789 offset += get_entity_offset(iter->compound_member.entity);
2791 orig_type = iter->declaration.type;
2793 expression_t *array_index = designator->array_index;
2794 assert(designator->array_index != NULL);
2795 assert(is_type_array(type));
2797 long index = fold_constant(array_index);
2798 ir_type *arr_type = get_ir_type(type);
2799 ir_type *elem_type = get_array_element_type(arr_type);
2800 long elem_size = get_type_size_bytes(elem_type);
2802 offset += index * elem_size;
2804 orig_type = type->array.element_type;
2811 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2813 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2814 long offset = get_offsetof_offset(expression);
2815 tarval *tv = new_tarval_from_long(offset, mode);
2816 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2818 return new_d_Const(dbgi, tv);
2821 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2822 ir_entity *entity, type_t *type);
2824 static ir_node *compound_literal_to_firm(
2825 const compound_literal_expression_t *expression)
2827 type_t *type = expression->type;
2829 /* create an entity on the stack */
2830 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2832 ident *const id = id_unique("CompLit.%u");
2833 ir_type *const irtype = get_ir_type(type);
2834 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2835 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2836 set_entity_ld_ident(entity, id);
2838 set_entity_variability(entity, variability_uninitialized);
2840 /* create initialisation code */
2841 initializer_t *initializer = expression->initializer;
2842 create_local_initializer(initializer, dbgi, entity, type);
2844 /* create a sel for the compound literal address */
2845 ir_node *frame = get_local_frame(entity);
2846 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2851 * Transform a sizeof expression into Firm code.
2853 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2855 type_t *type = expression->type;
2857 type = expression->tp_expression->base.type;
2858 assert(type != NULL);
2861 type = skip_typeref(type);
2862 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2863 if (is_type_array(type) && type->array.is_vla
2864 && expression->tp_expression != NULL) {
2865 expression_to_firm(expression->tp_expression);
2868 return get_type_size(type);
2871 static entity_t *get_expression_entity(const expression_t *expression)
2873 if (expression->kind != EXPR_REFERENCE)
2876 return expression->reference.entity;
2880 * Transform an alignof expression into Firm code.
2882 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2884 ir_entity *irentity = NULL;
2886 const expression_t *tp_expression = expression->tp_expression;
2887 if (tp_expression != NULL) {
2888 entity_t *entity = get_expression_entity(tp_expression);
2889 if (entity != NULL && is_declaration(entity)) {
2890 switch (entity->declaration.kind) {
2891 case DECLARATION_KIND_UNKNOWN:
2892 panic("unknown entity reference found");
2893 case DECLARATION_KIND_COMPOUND_MEMBER:
2894 irentity = entity->compound_member.entity;
2896 case DECLARATION_KIND_GLOBAL_VARIABLE:
2897 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2898 irentity = entity->variable.v.entity;
2900 case DECLARATION_KIND_PARAMETER_ENTITY:
2901 irentity = entity->parameter.v.entity;
2903 case DECLARATION_KIND_FUNCTION:
2904 case DECLARATION_KIND_INNER_FUNCTION:
2905 irentity = entity->function.entity;
2907 case DECLARATION_KIND_PARAMETER:
2908 case DECLARATION_KIND_LOCAL_VARIABLE:
2909 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2916 if (irentity != NULL) {
2917 irtype = get_entity_type(irentity);
2919 type_t *type = expression->type;
2920 irtype = get_ir_type(type);
2923 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2924 symconst_symbol sym;
2925 sym.type_p = irtype;
2926 return new_SymConst(mode, sym, symconst_type_align);
2929 static void init_ir_types(void);
2931 long fold_constant(const expression_t *expression)
2933 assert(is_type_valid(skip_typeref(expression->base.type)));
2935 bool constant_folding_old = constant_folding;
2936 constant_folding = true;
2940 assert(is_constant_expression(expression));
2942 ir_graph *old_current_ir_graph = current_ir_graph;
2943 current_ir_graph = get_const_code_irg();
2945 ir_node *cnst = expression_to_firm(expression);
2946 current_ir_graph = old_current_ir_graph;
2948 if (!is_Const(cnst)) {
2949 panic("couldn't fold constant");
2952 tarval *tv = get_Const_tarval(cnst);
2953 if (!tarval_is_long(tv)) {
2954 panic("result of constant folding is not integer");
2957 constant_folding = constant_folding_old;
2959 return get_tarval_long(tv);
2962 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2964 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2966 /* first try to fold a constant condition */
2967 if (is_constant_expression(expression->condition)) {
2968 long val = fold_constant(expression->condition);
2970 expression_t *true_expression = expression->true_expression;
2971 if (true_expression == NULL)
2972 true_expression = expression->condition;
2973 return expression_to_firm(true_expression);
2975 return expression_to_firm(expression->false_expression);
2979 ir_node *cur_block = get_cur_block();
2981 /* create the true block */
2982 ir_node *true_block = new_immBlock();
2983 set_cur_block(true_block);
2985 ir_node *true_val = expression->true_expression != NULL ?
2986 expression_to_firm(expression->true_expression) : NULL;
2987 ir_node *true_jmp = new_Jmp();
2989 /* create the false block */
2990 ir_node *false_block = new_immBlock();
2991 set_cur_block(false_block);
2993 ir_node *false_val = expression_to_firm(expression->false_expression);
2994 ir_node *false_jmp = new_Jmp();
2996 /* create the condition evaluation */
2997 set_cur_block(cur_block);
2998 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2999 if (expression->true_expression == NULL) {
3000 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3001 true_val = cond_expr;
3003 /* Condition ended with a short circuit (&&, ||, !) operation or a
3004 * comparison. Generate a "1" as value for the true branch. */
3005 true_val = new_Const(get_mode_one(mode_Is));
3008 mature_immBlock(true_block);
3009 mature_immBlock(false_block);
3011 /* create the common block */
3012 ir_node *in_cf[2] = { true_jmp, false_jmp };
3013 new_Block(2, in_cf);
3015 /* TODO improve static semantics, so either both or no values are NULL */
3016 if (true_val == NULL || false_val == NULL)
3019 ir_node *in[2] = { true_val, false_val };
3020 ir_mode *mode = get_irn_mode(true_val);
3021 assert(get_irn_mode(false_val) == mode);
3022 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
3028 * Returns an IR-node representing the address of a field.
3030 static ir_node *select_addr(const select_expression_t *expression)
3032 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3034 construct_select_compound(expression);
3036 ir_node *compound_addr = expression_to_firm(expression->compound);
3038 entity_t *entry = expression->compound_entry;
3039 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3040 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3042 if (constant_folding) {
3043 ir_mode *mode = get_irn_mode(compound_addr);
3044 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3045 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3046 return new_d_Add(dbgi, compound_addr, ofs, mode);
3048 ir_entity *irentity = entry->compound_member.entity;
3049 assert(irentity != NULL);
3050 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3054 static ir_node *select_to_firm(const select_expression_t *expression)
3056 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3057 ir_node *addr = select_addr(expression);
3058 type_t *type = revert_automatic_type_conversion(
3059 (const expression_t*) expression);
3060 type = skip_typeref(type);
3062 entity_t *entry = expression->compound_entry;
3063 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3064 type_t *entry_type = skip_typeref(entry->declaration.type);
3066 if (entry_type->kind == TYPE_BITFIELD) {
3067 return bitfield_extract_to_firm(expression, addr);
3070 return deref_address(dbgi, type, addr);
3073 /* Values returned by __builtin_classify_type. */
3074 typedef enum gcc_type_class
3080 enumeral_type_class,
3083 reference_type_class,
3087 function_type_class,
3098 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3100 type_t *type = expr->type_expression->base.type;
3102 /* FIXME gcc returns different values depending on whether compiling C or C++
3103 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3106 type = skip_typeref(type);
3107 switch (type->kind) {
3109 const atomic_type_t *const atomic_type = &type->atomic;
3110 switch (atomic_type->akind) {
3111 /* should not be reached */
3112 case ATOMIC_TYPE_INVALID:
3116 /* gcc cannot do that */
3117 case ATOMIC_TYPE_VOID:
3118 tc = void_type_class;
3121 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3122 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3123 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3124 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3125 case ATOMIC_TYPE_SHORT:
3126 case ATOMIC_TYPE_USHORT:
3127 case ATOMIC_TYPE_INT:
3128 case ATOMIC_TYPE_UINT:
3129 case ATOMIC_TYPE_LONG:
3130 case ATOMIC_TYPE_ULONG:
3131 case ATOMIC_TYPE_LONGLONG:
3132 case ATOMIC_TYPE_ULONGLONG:
3133 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3134 tc = integer_type_class;
3137 case ATOMIC_TYPE_FLOAT:
3138 case ATOMIC_TYPE_DOUBLE:
3139 case ATOMIC_TYPE_LONG_DOUBLE:
3140 tc = real_type_class;
3143 panic("Unexpected atomic type in classify_type_to_firm().");
3146 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3147 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3148 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3149 case TYPE_ARRAY: /* gcc handles this as pointer */
3150 case TYPE_FUNCTION: /* gcc handles this as pointer */
3151 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3152 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3153 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3155 /* gcc handles this as integer */
3156 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3158 /* gcc classifies the referenced type */
3159 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3162 /* typedef/typeof should be skipped already */
3169 panic("unexpected TYPE classify_type_to_firm().");
3173 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3174 tarval *const tv = new_tarval_from_long(tc, mode_int);
3175 return new_d_Const(dbgi, tv);
3178 static ir_node *function_name_to_firm(
3179 const funcname_expression_t *const expr)
3181 switch(expr->kind) {
3182 case FUNCNAME_FUNCTION:
3183 case FUNCNAME_PRETTY_FUNCTION:
3184 case FUNCNAME_FUNCDNAME:
3185 if (current_function_name == NULL) {
3186 const source_position_t *const src_pos = &expr->base.source_position;
3187 const char *name = current_function_entity->base.symbol->string;
3188 const string_t string = { name, strlen(name) + 1 };
3189 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3191 return current_function_name;
3192 case FUNCNAME_FUNCSIG:
3193 if (current_funcsig == NULL) {
3194 const source_position_t *const src_pos = &expr->base.source_position;
3195 ir_entity *ent = get_irg_entity(current_ir_graph);
3196 const char *const name = get_entity_ld_name(ent);
3197 const string_t string = { name, strlen(name) + 1 };
3198 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3200 return current_funcsig;
3202 panic("Unsupported function name");
3205 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3207 statement_t *statement = expr->statement;
3209 assert(statement->kind == STATEMENT_COMPOUND);
3210 return compound_statement_to_firm(&statement->compound);
3213 static ir_node *va_start_expression_to_firm(
3214 const va_start_expression_t *const expr)
3216 type_t *const type = current_function_entity->declaration.type;
3217 ir_type *const method_type = get_ir_type(type);
3218 int const n = get_method_n_params(method_type) - 1;
3219 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3220 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3221 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3222 ir_node *const no_mem = new_NoMem();
3223 ir_node *const arg_sel =
3224 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3226 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3227 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3228 set_value_for_expression(expr->ap, add);
3233 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3235 type_t *const type = expr->base.type;
3236 expression_t *const ap_expr = expr->ap;
3237 ir_node *const ap_addr = expression_to_addr(ap_expr);
3238 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3239 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3240 ir_node *const res = deref_address(dbgi, type, ap);
3242 ir_node *const cnst = get_type_size(expr->base.type);
3243 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3245 set_value_for_expression_addr(ap_expr, add, ap_addr);
3250 static ir_node *dereference_addr(const unary_expression_t *const expression)
3252 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3253 return expression_to_firm(expression->value);
3257 * Returns a IR-node representing an lvalue of the given expression.
3259 static ir_node *expression_to_addr(const expression_t *expression)
3261 switch(expression->kind) {
3262 case EXPR_ARRAY_ACCESS:
3263 return array_access_addr(&expression->array_access);
3265 return call_expression_to_firm(&expression->call);
3266 case EXPR_COMPOUND_LITERAL:
3267 return compound_literal_to_firm(&expression->compound_literal);
3268 case EXPR_REFERENCE:
3269 return reference_addr(&expression->reference);
3271 return select_addr(&expression->select);
3272 case EXPR_UNARY_DEREFERENCE:
3273 return dereference_addr(&expression->unary);
3277 panic("trying to get address of non-lvalue");
3280 static ir_node *builtin_constant_to_firm(
3281 const builtin_constant_expression_t *expression)
3283 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3286 if (is_constant_expression(expression->value)) {
3291 return new_Const_long(mode, v);
3294 static ir_node *builtin_types_compatible_to_firm(
3295 const builtin_types_compatible_expression_t *expression)
3297 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3298 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3299 long const value = types_compatible(left, right) ? 1 : 0;
3300 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3301 return new_Const_long(mode, value);
3304 static ir_node *get_label_block(label_t *label)
3306 if (label->block != NULL)
3307 return label->block;
3309 /* beware: might be called from create initializer with current_ir_graph
3310 * set to const_code_irg. */
3311 ir_graph *rem = current_ir_graph;
3312 current_ir_graph = current_function;
3314 ir_node *block = new_immBlock();
3316 label->block = block;
3318 ARR_APP1(label_t *, all_labels, label);
3320 current_ir_graph = rem;
3325 * Pointer to a label. This is used for the
3326 * GNU address-of-label extension.
3328 static ir_node *label_address_to_firm(
3329 const label_address_expression_t *label)
3331 ir_node *block = get_label_block(label->label);
3332 ir_label_t nr = get_Block_label(block);
3335 nr = get_irp_next_label_nr();
3336 set_Block_label(block, nr);
3338 symconst_symbol value;
3340 return new_SymConst(mode_P_code, value, symconst_label);
3344 * creates firm nodes for an expression. The difference between this function
3345 * and expression_to_firm is, that this version might produce mode_b nodes
3346 * instead of mode_Is.
3348 static ir_node *_expression_to_firm(const expression_t *expression)
3351 if (!constant_folding) {
3352 assert(!expression->base.transformed);
3353 ((expression_t*) expression)->base.transformed = true;
3357 switch (expression->kind) {
3358 case EXPR_CHARACTER_CONSTANT:
3359 return character_constant_to_firm(&expression->conste);
3360 case EXPR_WIDE_CHARACTER_CONSTANT:
3361 return wide_character_constant_to_firm(&expression->conste);
3363 return const_to_firm(&expression->conste);
3364 case EXPR_STRING_LITERAL:
3365 return string_literal_to_firm(&expression->string);
3366 case EXPR_WIDE_STRING_LITERAL:
3367 return wide_string_literal_to_firm(&expression->wide_string);
3368 case EXPR_REFERENCE:
3369 return reference_expression_to_firm(&expression->reference);
3370 case EXPR_REFERENCE_ENUM_VALUE:
3371 return reference_expression_enum_value_to_firm(&expression->reference);
3373 return call_expression_to_firm(&expression->call);
3375 return unary_expression_to_firm(&expression->unary);
3377 return binary_expression_to_firm(&expression->binary);
3378 case EXPR_ARRAY_ACCESS:
3379 return array_access_to_firm(&expression->array_access);
3381 return sizeof_to_firm(&expression->typeprop);
3383 return alignof_to_firm(&expression->typeprop);
3384 case EXPR_CONDITIONAL:
3385 return conditional_to_firm(&expression->conditional);
3387 return select_to_firm(&expression->select);
3388 case EXPR_CLASSIFY_TYPE:
3389 return classify_type_to_firm(&expression->classify_type);
3391 return function_name_to_firm(&expression->funcname);
3392 case EXPR_STATEMENT:
3393 return statement_expression_to_firm(&expression->statement);
3395 return va_start_expression_to_firm(&expression->va_starte);
3397 return va_arg_expression_to_firm(&expression->va_arge);
3398 case EXPR_BUILTIN_CONSTANT_P:
3399 return builtin_constant_to_firm(&expression->builtin_constant);
3400 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3401 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3403 return offsetof_to_firm(&expression->offsetofe);
3404 case EXPR_COMPOUND_LITERAL:
3405 return compound_literal_to_firm(&expression->compound_literal);
3406 case EXPR_LABEL_ADDRESS:
3407 return label_address_to_firm(&expression->label_address);
3413 panic("invalid expression found");
3417 * Check if a given expression is a GNU __builtin_expect() call.
3419 static bool is_builtin_expect(const expression_t *expression)
3421 if (expression->kind != EXPR_CALL)
3424 expression_t *function = expression->call.function;
3425 if (function->kind != EXPR_REFERENCE)
3427 reference_expression_t *ref = &function->reference;
3428 if (ref->entity->kind != ENTITY_FUNCTION ||
3429 ref->entity->function.btk != bk_gnu_builtin_expect)
3435 static bool produces_mode_b(const expression_t *expression)
3437 switch (expression->kind) {
3438 case EXPR_BINARY_EQUAL:
3439 case EXPR_BINARY_NOTEQUAL:
3440 case EXPR_BINARY_LESS:
3441 case EXPR_BINARY_LESSEQUAL:
3442 case EXPR_BINARY_GREATER:
3443 case EXPR_BINARY_GREATEREQUAL:
3444 case EXPR_BINARY_ISGREATER:
3445 case EXPR_BINARY_ISGREATEREQUAL:
3446 case EXPR_BINARY_ISLESS:
3447 case EXPR_BINARY_ISLESSEQUAL:
3448 case EXPR_BINARY_ISLESSGREATER:
3449 case EXPR_BINARY_ISUNORDERED:
3450 case EXPR_UNARY_NOT:
3454 if (is_builtin_expect(expression)) {
3455 expression_t *argument = expression->call.arguments->expression;
3456 return produces_mode_b(argument);
3459 case EXPR_BINARY_COMMA:
3460 return produces_mode_b(expression->binary.right);
3467 static ir_node *expression_to_firm(const expression_t *expression)
3469 if (!produces_mode_b(expression)) {
3470 ir_node *res = _expression_to_firm(expression);
3471 assert(res == NULL || get_irn_mode(res) != mode_b);
3475 if (is_constant_expression(expression)) {
3476 ir_node *res = _expression_to_firm(expression);
3477 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3478 assert(is_Const(res));
3479 if (is_Const_null(res)) {
3480 return new_Const_long(mode, 0);
3482 return new_Const_long(mode, 1);
3486 /* we have to produce a 0/1 from the mode_b expression */
3487 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3488 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3489 return produce_condition_result(expression, mode, dbgi);
3493 * create a short-circuit expression evaluation that tries to construct
3494 * efficient control flow structures for &&, || and ! expressions
3496 static ir_node *create_condition_evaluation(const expression_t *expression,
3497 ir_node *true_block,
3498 ir_node *false_block)
3500 switch(expression->kind) {
3501 case EXPR_UNARY_NOT: {
3502 const unary_expression_t *unary_expression = &expression->unary;
3503 create_condition_evaluation(unary_expression->value, false_block,
3507 case EXPR_BINARY_LOGICAL_AND: {
3508 const binary_expression_t *binary_expression = &expression->binary;
3510 ir_node *extra_block = new_immBlock();
3511 create_condition_evaluation(binary_expression->left, extra_block,
3513 mature_immBlock(extra_block);
3514 set_cur_block(extra_block);
3515 create_condition_evaluation(binary_expression->right, true_block,
3519 case EXPR_BINARY_LOGICAL_OR: {
3520 const binary_expression_t *binary_expression = &expression->binary;
3522 ir_node *extra_block = new_immBlock();
3523 create_condition_evaluation(binary_expression->left, true_block,
3525 mature_immBlock(extra_block);
3526 set_cur_block(extra_block);
3527 create_condition_evaluation(binary_expression->right, true_block,
3535 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3536 ir_node *cond_expr = _expression_to_firm(expression);
3537 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3538 ir_node *cond = new_d_Cond(dbgi, condition);
3539 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3540 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3542 /* set branch prediction info based on __builtin_expect */
3543 if (is_builtin_expect(expression) && is_Cond(cond)) {
3544 call_argument_t *argument = expression->call.arguments->next;
3545 if (is_constant_expression(argument->expression)) {
3546 long cnst = fold_constant(argument->expression);
3547 cond_jmp_predicate pred;
3550 pred = COND_JMP_PRED_FALSE;
3552 pred = COND_JMP_PRED_TRUE;
3554 set_Cond_jmp_pred(cond, pred);
3558 add_immBlock_pred(true_block, true_proj);
3559 add_immBlock_pred(false_block, false_proj);
3561 set_cur_block(NULL);
3566 static void create_variable_entity(entity_t *variable,
3567 declaration_kind_t declaration_kind,
3568 ir_type *parent_type)
3570 assert(variable->kind == ENTITY_VARIABLE);
3571 type_t *type = skip_typeref(variable->declaration.type);
3572 type = get_aligned_type(type, variable->variable.alignment);
3574 ident *const id = new_id_from_str(variable->base.symbol->string);
3575 ir_type *const irtype = get_ir_type(type);
3576 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3578 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3580 handle_gnu_attributes_ent(irentity, variable);
3582 variable->declaration.kind = (unsigned char) declaration_kind;
3583 variable->variable.v.entity = irentity;
3584 set_entity_variability(irentity, variability_uninitialized);
3585 set_entity_ld_ident(irentity, create_ld_ident(variable));
3587 if (parent_type == get_tls_type())
3588 set_entity_allocation(irentity, allocation_automatic);
3589 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3590 set_entity_allocation(irentity, allocation_static);
3592 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3593 set_entity_volatility(irentity, volatility_is_volatile);
3598 typedef struct type_path_entry_t type_path_entry_t;
3599 struct type_path_entry_t {
3601 ir_initializer_t *initializer;
3603 entity_t *compound_entry;
3606 typedef struct type_path_t type_path_t;
3607 struct type_path_t {
3608 type_path_entry_t *path;
3613 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3615 size_t len = ARR_LEN(path->path);
3617 for (size_t i = 0; i < len; ++i) {
3618 const type_path_entry_t *entry = & path->path[i];
3620 type_t *type = skip_typeref(entry->type);
3621 if (is_type_compound(type)) {
3622 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3623 } else if (is_type_array(type)) {
3624 fprintf(stderr, "[%u]", (unsigned) entry->index);
3626 fprintf(stderr, "-INVALID-");
3629 fprintf(stderr, " (");
3630 print_type(path->top_type);
3631 fprintf(stderr, ")");
3634 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3636 size_t len = ARR_LEN(path->path);
3638 return & path->path[len-1];
3641 static type_path_entry_t *append_to_type_path(type_path_t *path)
3643 size_t len = ARR_LEN(path->path);
3644 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3646 type_path_entry_t *result = & path->path[len];
3647 memset(result, 0, sizeof(result[0]));
3651 static size_t get_compound_member_count(const compound_type_t *type)
3653 compound_t *compound = type->compound;
3654 size_t n_members = 0;
3655 entity_t *member = compound->members.entities;
3656 for ( ; member != NULL; member = member->base.next) {
3663 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3665 type_t *orig_top_type = path->top_type;
3666 type_t *top_type = skip_typeref(orig_top_type);
3668 assert(is_type_compound(top_type) || is_type_array(top_type));
3670 if (ARR_LEN(path->path) == 0) {
3673 type_path_entry_t *top = get_type_path_top(path);
3674 ir_initializer_t *initializer = top->initializer;
3675 return get_initializer_compound_value(initializer, top->index);
3679 static void descend_into_subtype(type_path_t *path)
3681 type_t *orig_top_type = path->top_type;
3682 type_t *top_type = skip_typeref(orig_top_type);
3684 assert(is_type_compound(top_type) || is_type_array(top_type));
3686 ir_initializer_t *initializer = get_initializer_entry(path);
3688 type_path_entry_t *top = append_to_type_path(path);
3689 top->type = top_type;
3693 if (is_type_compound(top_type)) {
3694 compound_t *compound = top_type->compound.compound;
3695 entity_t *entry = compound->members.entities;
3697 top->compound_entry = entry;
3699 len = get_compound_member_count(&top_type->compound);
3700 if (entry != NULL) {
3701 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3702 path->top_type = entry->declaration.type;
3705 assert(is_type_array(top_type));
3706 assert(top_type->array.size > 0);
3709 path->top_type = top_type->array.element_type;
3710 len = top_type->array.size;
3712 if (initializer == NULL
3713 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3714 initializer = create_initializer_compound(len);
3715 /* we have to set the entry at the 2nd latest path entry... */
3716 size_t path_len = ARR_LEN(path->path);
3717 assert(path_len >= 1);
3719 type_path_entry_t *entry = & path->path[path_len-2];
3720 ir_initializer_t *tinitializer = entry->initializer;
3721 set_initializer_compound_value(tinitializer, entry->index,
3725 top->initializer = initializer;
3728 static void ascend_from_subtype(type_path_t *path)
3730 type_path_entry_t *top = get_type_path_top(path);
3732 path->top_type = top->type;
3734 size_t len = ARR_LEN(path->path);
3735 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3738 static void walk_designator(type_path_t *path, const designator_t *designator)
3740 /* designators start at current object type */
3741 ARR_RESIZE(type_path_entry_t, path->path, 1);
3743 for ( ; designator != NULL; designator = designator->next) {
3744 type_path_entry_t *top = get_type_path_top(path);
3745 type_t *orig_type = top->type;
3746 type_t *type = skip_typeref(orig_type);
3748 if (designator->symbol != NULL) {
3749 assert(is_type_compound(type));
3751 symbol_t *symbol = designator->symbol;
3753 compound_t *compound = type->compound.compound;
3754 entity_t *iter = compound->members.entities;
3755 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3756 if (iter->base.symbol == symbol) {
3757 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3761 assert(iter != NULL);
3763 top->type = orig_type;
3764 top->compound_entry = iter;
3766 orig_type = iter->declaration.type;
3768 expression_t *array_index = designator->array_index;
3769 assert(designator->array_index != NULL);
3770 assert(is_type_array(type));
3772 long index = fold_constant(array_index);
3775 if (type->array.size_constant) {
3776 long array_size = type->array.size;
3777 assert(index < array_size);
3781 top->type = orig_type;
3782 top->index = (size_t) index;
3783 orig_type = type->array.element_type;
3785 path->top_type = orig_type;
3787 if (designator->next != NULL) {
3788 descend_into_subtype(path);
3792 path->invalid = false;
3795 static void advance_current_object(type_path_t *path)
3797 if (path->invalid) {
3798 /* TODO: handle this... */
3799 panic("invalid initializer in ast2firm (excessive elements)");
3802 type_path_entry_t *top = get_type_path_top(path);
3804 type_t *type = skip_typeref(top->type);
3805 if (is_type_union(type)) {
3806 top->compound_entry = NULL;
3807 } else if (is_type_struct(type)) {
3808 entity_t *entry = top->compound_entry;
3811 entry = entry->base.next;
3812 top->compound_entry = entry;
3813 if (entry != NULL) {
3814 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3815 path->top_type = entry->declaration.type;
3819 assert(is_type_array(type));
3822 if (!type->array.size_constant || top->index < type->array.size) {
3827 /* we're past the last member of the current sub-aggregate, try if we
3828 * can ascend in the type hierarchy and continue with another subobject */
3829 size_t len = ARR_LEN(path->path);
3832 ascend_from_subtype(path);
3833 advance_current_object(path);
3835 path->invalid = true;
3840 static ir_initializer_t *create_ir_initializer(
3841 const initializer_t *initializer, type_t *type);
3843 static ir_initializer_t *create_ir_initializer_value(
3844 const initializer_value_t *initializer)
3846 if (is_type_compound(initializer->value->base.type)) {
3847 panic("initializer creation for compounds not implemented yet");
3849 ir_node *value = expression_to_firm(initializer->value);
3850 type_t *type = initializer->value->base.type;
3851 ir_mode *mode = get_ir_mode_storage(type);
3852 value = create_conv(NULL, value, mode);
3853 return create_initializer_const(value);
3856 /** test wether type can be initialized by a string constant */
3857 static bool is_string_type(type_t *type)
3860 if (is_type_pointer(type)) {
3861 inner = skip_typeref(type->pointer.points_to);
3862 } else if(is_type_array(type)) {
3863 inner = skip_typeref(type->array.element_type);
3868 return is_type_integer(inner);
3871 static ir_initializer_t *create_ir_initializer_list(
3872 const initializer_list_t *initializer, type_t *type)
3875 memset(&path, 0, sizeof(path));
3876 path.top_type = type;
3877 path.path = NEW_ARR_F(type_path_entry_t, 0);
3879 descend_into_subtype(&path);
3881 for (size_t i = 0; i < initializer->len; ++i) {
3882 const initializer_t *sub_initializer = initializer->initializers[i];
3884 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3885 walk_designator(&path, sub_initializer->designator.designator);
3889 if (sub_initializer->kind == INITIALIZER_VALUE) {
3890 /* we might have to descend into types until we're at a scalar
3893 type_t *orig_top_type = path.top_type;
3894 type_t *top_type = skip_typeref(orig_top_type);
3896 if (is_type_scalar(top_type))
3898 descend_into_subtype(&path);
3900 } else if (sub_initializer->kind == INITIALIZER_STRING
3901 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3902 /* we might have to descend into types until we're at a scalar
3905 type_t *orig_top_type = path.top_type;
3906 type_t *top_type = skip_typeref(orig_top_type);
3908 if (is_string_type(top_type))
3910 descend_into_subtype(&path);
3914 ir_initializer_t *sub_irinitializer
3915 = create_ir_initializer(sub_initializer, path.top_type);
3917 size_t path_len = ARR_LEN(path.path);
3918 assert(path_len >= 1);
3919 type_path_entry_t *entry = & path.path[path_len-1];
3920 ir_initializer_t *tinitializer = entry->initializer;
3921 set_initializer_compound_value(tinitializer, entry->index,
3924 advance_current_object(&path);
3927 assert(ARR_LEN(path.path) >= 1);
3928 ir_initializer_t *result = path.path[0].initializer;
3929 DEL_ARR_F(path.path);
3934 static ir_initializer_t *create_ir_initializer_string(
3935 const initializer_string_t *initializer, type_t *type)
3937 type = skip_typeref(type);
3939 size_t string_len = initializer->string.size;
3940 assert(type->kind == TYPE_ARRAY);
3941 assert(type->array.size_constant);
3942 size_t len = type->array.size;
3943 ir_initializer_t *irinitializer = create_initializer_compound(len);
3945 const char *string = initializer->string.begin;
3946 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3948 for (size_t i = 0; i < len; ++i) {
3953 tarval *tv = new_tarval_from_long(c, mode);
3954 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3956 set_initializer_compound_value(irinitializer, i, char_initializer);
3959 return irinitializer;
3962 static ir_initializer_t *create_ir_initializer_wide_string(
3963 const initializer_wide_string_t *initializer, type_t *type)
3965 size_t string_len = initializer->string.size;
3966 assert(type->kind == TYPE_ARRAY);
3967 assert(type->array.size_constant);
3968 size_t len = type->array.size;
3969 ir_initializer_t *irinitializer = create_initializer_compound(len);
3971 const wchar_rep_t *string = initializer->string.begin;
3972 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3974 for (size_t i = 0; i < len; ++i) {
3976 if (i < string_len) {
3979 tarval *tv = new_tarval_from_long(c, mode);
3980 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3982 set_initializer_compound_value(irinitializer, i, char_initializer);
3985 return irinitializer;
3988 static ir_initializer_t *create_ir_initializer(
3989 const initializer_t *initializer, type_t *type)
3991 switch(initializer->kind) {
3992 case INITIALIZER_STRING:
3993 return create_ir_initializer_string(&initializer->string, type);
3995 case INITIALIZER_WIDE_STRING:
3996 return create_ir_initializer_wide_string(&initializer->wide_string,
3999 case INITIALIZER_LIST:
4000 return create_ir_initializer_list(&initializer->list, type);
4002 case INITIALIZER_VALUE:
4003 return create_ir_initializer_value(&initializer->value);
4005 case INITIALIZER_DESIGNATOR:
4006 panic("unexpected designator initializer found");
4008 panic("unknown initializer");
4011 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
4014 if (is_atomic_type(type)) {
4015 ir_mode *mode = get_type_mode(type);
4016 tarval *zero = get_mode_null(mode);
4017 ir_node *cnst = new_d_Const(dbgi, zero);
4019 /* TODO: bitfields */
4020 ir_node *mem = get_store();
4021 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4022 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4025 assert(is_compound_type(type));
4028 if (is_Array_type(type)) {
4029 assert(has_array_upper_bound(type, 0));
4030 n_members = get_array_upper_bound_int(type, 0);
4032 n_members = get_compound_n_members(type);
4035 for (int i = 0; i < n_members; ++i) {
4038 if (is_Array_type(type)) {
4039 ir_entity *entity = get_array_element_entity(type);
4040 tarval *index_tv = new_tarval_from_long(i, mode_uint);
4041 ir_node *cnst = new_d_Const(dbgi, index_tv);
4042 ir_node *in[1] = { cnst };
4043 irtype = get_array_element_type(type);
4044 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
4046 ir_entity *member = get_compound_member(type, i);
4048 irtype = get_entity_type(member);
4049 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
4052 create_dynamic_null_initializer(irtype, dbgi, addr);
4057 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4058 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4060 switch(get_initializer_kind(initializer)) {
4061 case IR_INITIALIZER_NULL: {
4062 create_dynamic_null_initializer(type, dbgi, base_addr);
4065 case IR_INITIALIZER_CONST: {
4066 ir_node *node = get_initializer_const_value(initializer);
4067 ir_mode *mode = get_irn_mode(node);
4068 ir_type *ent_type = get_entity_type(entity);
4070 /* is it a bitfield type? */
4071 if (is_Primitive_type(ent_type) &&
4072 get_primitive_base_type(ent_type) != NULL) {
4073 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4077 assert(get_type_mode(type) == mode);
4078 ir_node *mem = get_store();
4079 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4080 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4084 case IR_INITIALIZER_TARVAL: {
4085 tarval *tv = get_initializer_tarval_value(initializer);
4086 ir_mode *mode = get_tarval_mode(tv);
4087 ir_node *cnst = new_d_Const(dbgi, tv);
4088 ir_type *ent_type = get_entity_type(entity);
4090 /* is it a bitfield type? */
4091 if (is_Primitive_type(ent_type) &&
4092 get_primitive_base_type(ent_type) != NULL) {
4093 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4097 assert(get_type_mode(type) == mode);
4098 ir_node *mem = get_store();
4099 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4100 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4104 case IR_INITIALIZER_COMPOUND: {
4105 assert(is_compound_type(type));
4107 if (is_Array_type(type)) {
4108 assert(has_array_upper_bound(type, 0));
4109 n_members = get_array_upper_bound_int(type, 0);
4111 n_members = get_compound_n_members(type);
4114 if (get_initializer_compound_n_entries(initializer)
4115 != (unsigned) n_members)
4116 panic("initializer doesn't match compound type");
4118 for (int i = 0; i < n_members; ++i) {
4121 ir_entity *sub_entity;
4122 if (is_Array_type(type)) {
4123 tarval *index_tv = new_tarval_from_long(i, mode_uint);
4124 ir_node *cnst = new_d_Const(dbgi, index_tv);
4125 ir_node *in[1] = { cnst };
4126 irtype = get_array_element_type(type);
4127 sub_entity = get_array_element_entity(type);
4128 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4131 sub_entity = get_compound_member(type, i);
4132 irtype = get_entity_type(sub_entity);
4133 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4137 ir_initializer_t *sub_init
4138 = get_initializer_compound_value(initializer, i);
4140 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4147 panic("invalid IR_INITIALIZER found");
4150 static void create_dynamic_initializer(ir_initializer_t *initializer,
4151 dbg_info *dbgi, ir_entity *entity)
4153 ir_node *frame = get_local_frame(entity);
4154 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4155 ir_type *type = get_entity_type(entity);
4157 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4160 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4161 ir_entity *entity, type_t *type)
4163 ir_node *memory = get_store();
4164 ir_node *nomem = new_NoMem();
4165 ir_node *frame = get_irg_frame(current_ir_graph);
4166 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4168 if (initializer->kind == INITIALIZER_VALUE) {
4169 initializer_value_t *initializer_value = &initializer->value;
4171 ir_node *value = expression_to_firm(initializer_value->value);
4172 type = skip_typeref(type);
4173 assign_value(dbgi, addr, type, value);
4177 if (!is_constant_initializer(initializer)) {
4178 ir_initializer_t *irinitializer
4179 = create_ir_initializer(initializer, type);
4181 create_dynamic_initializer(irinitializer, dbgi, entity);
4185 /* create the ir_initializer */
4186 ir_graph *const old_current_ir_graph = current_ir_graph;
4187 current_ir_graph = get_const_code_irg();
4189 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4191 assert(current_ir_graph == get_const_code_irg());
4192 current_ir_graph = old_current_ir_graph;
4194 /* create a "template" entity which is copied to the entity on the stack */
4195 ident *const id = id_unique("initializer.%u");
4196 ir_type *const irtype = get_ir_type(type);
4197 ir_type *const global_type = get_glob_type();
4198 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4199 set_entity_ld_ident(init_entity, id);
4201 set_entity_variability(init_entity, variability_initialized);
4202 set_entity_visibility(init_entity, visibility_local);
4203 set_entity_allocation(init_entity, allocation_static);
4205 set_entity_initializer(init_entity, irinitializer);
4207 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4208 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4210 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4211 set_store(copyb_mem);
4214 static void create_initializer_local_variable_entity(entity_t *entity)
4216 assert(entity->kind == ENTITY_VARIABLE);
4217 initializer_t *initializer = entity->variable.initializer;
4218 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4219 ir_entity *irentity = entity->variable.v.entity;
4220 type_t *type = entity->declaration.type;
4222 type = get_aligned_type(type, entity->variable.alignment);
4223 create_local_initializer(initializer, dbgi, irentity, type);
4226 static void create_variable_initializer(entity_t *entity)
4228 assert(entity->kind == ENTITY_VARIABLE);
4229 initializer_t *initializer = entity->variable.initializer;
4230 if (initializer == NULL)
4233 declaration_kind_t declaration_kind
4234 = (declaration_kind_t) entity->declaration.kind;
4235 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4236 create_initializer_local_variable_entity(entity);
4240 type_t *type = entity->declaration.type;
4241 type_qualifiers_t tq = get_type_qualifier(type, true);
4243 if (initializer->kind == INITIALIZER_VALUE) {
4244 initializer_value_t *initializer_value = &initializer->value;
4245 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4247 ir_node *value = expression_to_firm(initializer_value->value);
4249 type_t *type = initializer_value->value->base.type;
4250 ir_mode *mode = get_ir_mode_storage(type);
4251 value = create_conv(dbgi, value, mode);
4252 value = do_strict_conv(dbgi, value);
4254 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4255 set_value(entity->variable.v.value_number, value);
4257 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4259 ir_entity *irentity = entity->variable.v.entity;
4261 if (tq & TYPE_QUALIFIER_CONST) {
4262 set_entity_variability(irentity, variability_constant);
4264 set_entity_variability(irentity, variability_initialized);
4266 set_atomic_ent_value(irentity, value);
4269 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4270 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4272 ir_entity *irentity = entity->variable.v.entity;
4273 ir_initializer_t *irinitializer
4274 = create_ir_initializer(initializer, type);
4276 if (tq & TYPE_QUALIFIER_CONST) {
4277 set_entity_variability(irentity, variability_constant);
4279 set_entity_variability(irentity, variability_initialized);
4281 set_entity_initializer(irentity, irinitializer);
4285 static void create_variable_length_array(entity_t *entity)
4287 assert(entity->kind == ENTITY_VARIABLE);
4288 assert(entity->variable.initializer == NULL);
4290 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4291 entity->variable.v.vla_base = NULL;
4293 /* TODO: record VLA somewhere so we create the free node when we leave
4297 static void allocate_variable_length_array(entity_t *entity)
4299 assert(entity->kind == ENTITY_VARIABLE);
4300 assert(entity->variable.initializer == NULL);
4301 assert(get_cur_block() != NULL);
4303 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4304 type_t *type = entity->declaration.type;
4305 ir_type *el_type = get_ir_type(type->array.element_type);
4307 /* make sure size_node is calculated */
4308 get_type_size(type);
4309 ir_node *elems = type->array.size_node;
4310 ir_node *mem = get_store();
4311 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4313 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4314 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4317 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4318 entity->variable.v.vla_base = addr;
4322 * Creates a Firm local variable from a declaration.
4324 static void create_local_variable(entity_t *entity)
4326 assert(entity->kind == ENTITY_VARIABLE);
4327 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4329 bool needs_entity = entity->variable.address_taken;
4330 type_t *type = skip_typeref(entity->declaration.type);
4332 /* is it a variable length array? */
4333 if (is_type_array(type) && !type->array.size_constant) {
4334 create_variable_length_array(entity);
4336 } else if (is_type_array(type) || is_type_compound(type)) {
4337 needs_entity = true;
4338 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4339 needs_entity = true;
4343 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4344 create_variable_entity(entity,
4345 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4348 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4349 entity->variable.v.value_number = next_value_number_function;
4350 set_irg_loc_description(current_ir_graph, next_value_number_function,
4352 ++next_value_number_function;
4356 static void create_local_static_variable(entity_t *entity)
4358 assert(entity->kind == ENTITY_VARIABLE);
4359 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4361 type_t *type = skip_typeref(entity->declaration.type);
4362 type = get_aligned_type(type, entity->variable.alignment);
4364 ir_type *const var_type = entity->variable.thread_local ?
4365 get_tls_type() : get_glob_type();
4366 ir_type *const irtype = get_ir_type(type);
4367 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4369 size_t l = strlen(entity->base.symbol->string);
4370 char buf[l + sizeof(".%u")];
4371 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4372 ident *const id = id_unique(buf);
4374 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4376 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4377 set_entity_volatility(irentity, volatility_is_volatile);
4380 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4381 entity->variable.v.entity = irentity;
4383 set_entity_ld_ident(irentity, id);
4384 set_entity_variability(irentity, variability_uninitialized);
4385 set_entity_visibility(irentity, visibility_local);
4386 set_entity_allocation(irentity, entity->variable.thread_local ?
4387 allocation_automatic : allocation_static);
4389 ir_graph *const old_current_ir_graph = current_ir_graph;
4390 current_ir_graph = get_const_code_irg();
4392 create_variable_initializer(entity);
4394 assert(current_ir_graph == get_const_code_irg());
4395 current_ir_graph = old_current_ir_graph;
4400 static void return_statement_to_firm(return_statement_t *statement)
4402 if (get_cur_block() == NULL)
4405 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4406 type_t *type = current_function_entity->declaration.type;
4407 ir_type *func_irtype = get_ir_type(type);
4412 if (get_method_n_ress(func_irtype) > 0) {
4413 ir_type *res_type = get_method_res_type(func_irtype, 0);
4415 if (statement->value != NULL) {
4416 ir_node *node = expression_to_firm(statement->value);
4417 if (!is_compound_type(res_type)) {
4418 type_t *type = statement->value->base.type;
4419 ir_mode *mode = get_ir_mode_storage(type);
4420 node = create_conv(dbgi, node, mode);
4421 node = do_strict_conv(dbgi, node);
4426 if (is_compound_type(res_type)) {
4429 mode = get_type_mode(res_type);
4431 in[0] = new_Unknown(mode);
4435 /* build return_value for its side effects */
4436 if (statement->value != NULL) {
4437 expression_to_firm(statement->value);
4442 ir_node *store = get_store();
4443 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4445 ir_node *end_block = get_irg_end_block(current_ir_graph);
4446 add_immBlock_pred(end_block, ret);
4448 set_cur_block(NULL);
4451 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4453 if (get_cur_block() == NULL)
4456 return expression_to_firm(statement->expression);
4459 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4461 entity_t *entity = compound->scope.entities;
4462 for ( ; entity != NULL; entity = entity->base.next) {
4463 if (!is_declaration(entity))
4466 create_local_declaration(entity);
4469 ir_node *result = NULL;
4470 statement_t *statement = compound->statements;
4471 for ( ; statement != NULL; statement = statement->base.next) {
4472 if (statement->base.next == NULL
4473 && statement->kind == STATEMENT_EXPRESSION) {
4474 result = expression_statement_to_firm(
4475 &statement->expression);
4478 statement_to_firm(statement);
4484 static void create_global_variable(entity_t *entity)
4486 assert(entity->kind == ENTITY_VARIABLE);
4489 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4490 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4491 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4492 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4494 default: panic("Invalid storage class for global variable");
4497 ir_type *var_type = entity->variable.thread_local ?
4498 get_tls_type() : get_glob_type();
4499 create_variable_entity(entity,
4500 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4501 set_entity_visibility(entity->variable.v.entity, vis);
4504 static void create_local_declaration(entity_t *entity)
4506 assert(is_declaration(entity));
4508 /* construct type */
4509 (void) get_ir_type(entity->declaration.type);
4510 if (entity->base.symbol == NULL) {
4514 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4515 case STORAGE_CLASS_STATIC:
4516 create_local_static_variable(entity);
4518 case STORAGE_CLASS_EXTERN:
4519 if (entity->kind == ENTITY_FUNCTION) {
4520 assert(entity->function.statement == NULL);
4521 get_function_entity(entity);
4523 create_global_variable(entity);
4524 create_variable_initializer(entity);
4527 case STORAGE_CLASS_NONE:
4528 case STORAGE_CLASS_AUTO:
4529 case STORAGE_CLASS_REGISTER:
4530 if (entity->kind == ENTITY_FUNCTION) {
4531 if (entity->function.statement != NULL) {
4532 get_function_entity(entity);
4533 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4534 enqueue_inner_function(entity);
4536 get_function_entity(entity);
4539 create_local_variable(entity);
4542 case STORAGE_CLASS_TYPEDEF:
4545 panic("invalid storage class found");
4548 static void initialize_local_declaration(entity_t *entity)
4550 if (entity->base.symbol == NULL)
4553 switch ((declaration_kind_t) entity->declaration.kind) {
4554 case DECLARATION_KIND_LOCAL_VARIABLE:
4555 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4556 create_variable_initializer(entity);
4559 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4560 allocate_variable_length_array(entity);
4563 case DECLARATION_KIND_COMPOUND_MEMBER:
4564 case DECLARATION_KIND_GLOBAL_VARIABLE:
4565 case DECLARATION_KIND_FUNCTION:
4566 case DECLARATION_KIND_INNER_FUNCTION:
4569 case DECLARATION_KIND_PARAMETER:
4570 case DECLARATION_KIND_PARAMETER_ENTITY:
4571 panic("can't initialize parameters");
4573 case DECLARATION_KIND_UNKNOWN:
4574 panic("can't initialize unknown declaration");
4576 panic("invalid declaration kind");
4579 static void declaration_statement_to_firm(declaration_statement_t *statement)
4581 entity_t *entity = statement->declarations_begin;
4585 entity_t *const last = statement->declarations_end;
4586 for ( ;; entity = entity->base.next) {
4587 if (is_declaration(entity)) {
4588 initialize_local_declaration(entity);
4589 } else if (entity->kind == ENTITY_TYPEDEF) {
4590 type_t *const type = skip_typeref(entity->typedefe.type);
4591 if (is_type_array(type) && type->array.is_vla)
4592 get_vla_size(&type->array);
4599 static void if_statement_to_firm(if_statement_t *statement)
4601 ir_node *cur_block = get_cur_block();
4603 ir_node *fallthrough_block = NULL;
4605 /* the true (blocks) */
4606 ir_node *true_block = NULL;
4607 if (statement->true_statement != NULL) {
4608 true_block = new_immBlock();
4609 set_cur_block(true_block);
4610 statement_to_firm(statement->true_statement);
4611 if (get_cur_block() != NULL) {
4612 ir_node *jmp = new_Jmp();
4613 if (fallthrough_block == NULL)
4614 fallthrough_block = new_immBlock();
4615 add_immBlock_pred(fallthrough_block, jmp);
4619 /* the false (blocks) */
4620 ir_node *false_block = NULL;
4621 if (statement->false_statement != NULL) {
4622 false_block = new_immBlock();
4623 set_cur_block(false_block);
4625 statement_to_firm(statement->false_statement);
4626 if (get_cur_block() != NULL) {
4627 ir_node *jmp = new_Jmp();
4628 if (fallthrough_block == NULL)
4629 fallthrough_block = new_immBlock();
4630 add_immBlock_pred(fallthrough_block, jmp);
4634 /* create the condition */
4635 if (cur_block != NULL) {
4636 if (true_block == NULL || false_block == NULL) {
4637 if (fallthrough_block == NULL)
4638 fallthrough_block = new_immBlock();
4639 if (true_block == NULL)
4640 true_block = fallthrough_block;
4641 if (false_block == NULL)
4642 false_block = fallthrough_block;
4645 set_cur_block(cur_block);
4646 create_condition_evaluation(statement->condition, true_block,
4650 mature_immBlock(true_block);
4651 if (false_block != fallthrough_block && false_block != NULL) {
4652 mature_immBlock(false_block);
4654 if (fallthrough_block != NULL) {
4655 mature_immBlock(fallthrough_block);
4658 set_cur_block(fallthrough_block);
4661 static void while_statement_to_firm(while_statement_t *statement)
4663 ir_node *jmp = NULL;
4664 if (get_cur_block() != NULL) {
4668 /* create the header block */
4669 ir_node *header_block = new_immBlock();
4671 add_immBlock_pred(header_block, jmp);
4675 ir_node *old_continue_label = continue_label;
4676 ir_node *old_break_label = break_label;
4677 continue_label = header_block;
4680 ir_node *body_block = new_immBlock();
4681 set_cur_block(body_block);
4682 statement_to_firm(statement->body);
4683 ir_node *false_block = break_label;
4685 assert(continue_label == header_block);
4686 continue_label = old_continue_label;
4687 break_label = old_break_label;
4689 if (get_cur_block() != NULL) {
4691 add_immBlock_pred(header_block, jmp);
4694 /* shortcut for while(true) */
4695 if (is_constant_expression(statement->condition)
4696 && fold_constant(statement->condition) != 0) {
4697 set_cur_block(header_block);
4698 ir_node *header_jmp = new_Jmp();
4699 add_immBlock_pred(body_block, header_jmp);
4701 keep_alive(body_block);
4702 keep_all_memory(body_block);
4703 set_cur_block(body_block);
4705 if (false_block == NULL) {
4706 false_block = new_immBlock();
4709 /* create the condition */
4710 set_cur_block(header_block);
4712 create_condition_evaluation(statement->condition, body_block,
4716 mature_immBlock(body_block);
4717 mature_immBlock(header_block);
4718 if (false_block != NULL) {
4719 mature_immBlock(false_block);
4722 set_cur_block(false_block);
4725 static void do_while_statement_to_firm(do_while_statement_t *statement)
4727 ir_node *jmp = NULL;
4728 if (get_cur_block() != NULL) {
4732 /* create the header block */
4733 ir_node *header_block = new_immBlock();
4736 ir_node *body_block = new_immBlock();
4738 add_immBlock_pred(body_block, jmp);
4741 ir_node *old_continue_label = continue_label;
4742 ir_node *old_break_label = break_label;
4743 continue_label = header_block;
4746 set_cur_block(body_block);
4747 statement_to_firm(statement->body);
4748 ir_node *false_block = break_label;
4750 assert(continue_label == header_block);
4751 continue_label = old_continue_label;
4752 break_label = old_break_label;
4754 if (get_cur_block() != NULL) {
4755 ir_node *body_jmp = new_Jmp();
4756 add_immBlock_pred(header_block, body_jmp);
4757 mature_immBlock(header_block);
4760 if (false_block == NULL) {
4761 false_block = new_immBlock();
4764 /* create the condition */
4765 set_cur_block(header_block);
4767 create_condition_evaluation(statement->condition, body_block, false_block);
4768 mature_immBlock(body_block);
4769 mature_immBlock(header_block);
4770 mature_immBlock(false_block);
4772 set_cur_block(false_block);
4775 static void for_statement_to_firm(for_statement_t *statement)
4777 ir_node *jmp = NULL;
4779 /* create declarations */
4780 entity_t *entity = statement->scope.entities;
4781 for ( ; entity != NULL; entity = entity->base.next) {
4782 if (!is_declaration(entity))
4785 create_local_declaration(entity);
4788 if (get_cur_block() != NULL) {
4789 entity = statement->scope.entities;
4790 for ( ; entity != NULL; entity = entity->base.next) {
4791 if (!is_declaration(entity))
4794 initialize_local_declaration(entity);
4797 if (statement->initialisation != NULL) {
4798 expression_to_firm(statement->initialisation);
4805 /* create the step block */
4806 ir_node *const step_block = new_immBlock();
4807 set_cur_block(step_block);
4808 if (statement->step != NULL) {
4809 expression_to_firm(statement->step);
4811 ir_node *const step_jmp = new_Jmp();
4813 /* create the header block */
4814 ir_node *const header_block = new_immBlock();
4815 set_cur_block(header_block);
4817 add_immBlock_pred(header_block, jmp);
4819 add_immBlock_pred(header_block, step_jmp);
4821 /* the false block */
4822 ir_node *const false_block = new_immBlock();
4825 ir_node *body_block;
4826 if (statement->body != NULL) {
4827 ir_node *const old_continue_label = continue_label;
4828 ir_node *const old_break_label = break_label;
4829 continue_label = step_block;
4830 break_label = false_block;
4832 body_block = new_immBlock();
4833 set_cur_block(body_block);
4834 statement_to_firm(statement->body);
4836 assert(continue_label == step_block);
4837 assert(break_label == false_block);
4838 continue_label = old_continue_label;
4839 break_label = old_break_label;
4841 if (get_cur_block() != NULL) {
4843 add_immBlock_pred(step_block, jmp);
4846 body_block = step_block;
4849 /* create the condition */
4850 set_cur_block(header_block);
4851 if (statement->condition != NULL) {
4852 create_condition_evaluation(statement->condition, body_block,
4855 keep_alive(header_block);
4856 keep_all_memory(header_block);
4858 add_immBlock_pred(body_block, jmp);
4861 mature_immBlock(body_block);
4862 mature_immBlock(false_block);
4863 mature_immBlock(step_block);
4864 mature_immBlock(header_block);
4865 mature_immBlock(false_block);
4867 set_cur_block(false_block);
4870 static void create_jump_statement(const statement_t *statement,
4871 ir_node *target_block)
4873 if (get_cur_block() == NULL)
4876 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4877 ir_node *jump = new_d_Jmp(dbgi);
4878 add_immBlock_pred(target_block, jump);
4880 set_cur_block(NULL);
4883 static ir_node *get_break_label(void)
4885 if (break_label == NULL) {
4886 break_label = new_immBlock();
4891 static void switch_statement_to_firm(switch_statement_t *statement)
4893 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4895 ir_node *expression = expression_to_firm(statement->expression);
4896 ir_node *cond = new_d_Cond(dbgi, expression);
4898 set_cur_block(NULL);
4900 ir_node *const old_switch_cond = current_switch_cond;
4901 ir_node *const old_break_label = break_label;
4902 const bool old_saw_default_label = saw_default_label;
4903 saw_default_label = false;
4904 current_switch_cond = cond;
4906 switch_statement_t *const old_switch = current_switch;
4907 current_switch = statement;
4909 /* determine a free number for the default label */
4910 unsigned long num_cases = 0;
4912 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4913 if (l->expression == NULL) {
4917 if (l->last_case >= l->first_case)
4918 num_cases += l->last_case - l->first_case + 1;
4919 if (l->last_case > def_nr)
4920 def_nr = l->last_case;
4923 if (def_nr == INT_MAX) {
4924 /* Bad: an overflow will occurr, we cannot be sure that the
4925 * maximum + 1 is a free number. Scan the values a second
4926 * time to find a free number.
4928 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4930 memset(bits, 0, (num_cases + 7) >> 3);
4931 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4932 if (l->expression == NULL) {
4936 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4937 if (start < num_cases && l->last_case >= 0) {
4938 unsigned long end = (unsigned long)l->last_case < num_cases ?
4939 (unsigned long)l->last_case : num_cases - 1;
4940 for (unsigned long cns = start; cns <= end; ++cns) {
4941 bits[cns >> 3] |= (1 << (cns & 7));
4945 /* We look at the first num_cases constants:
4946 * Either they are densed, so we took the last (num_cases)
4947 * one, or they are non densed, so we will find one free
4951 for (i = 0; i < num_cases; ++i)
4952 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4960 statement->default_proj_nr = def_nr;
4962 if (statement->body != NULL) {
4963 statement_to_firm(statement->body);
4966 if (get_cur_block() != NULL) {
4967 ir_node *jmp = new_Jmp();
4968 add_immBlock_pred(get_break_label(), jmp);
4971 if (!saw_default_label) {
4972 set_cur_block(get_nodes_block(cond));
4973 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4974 statement->default_proj_nr);
4975 add_immBlock_pred(get_break_label(), proj);
4978 if (break_label != NULL) {
4979 mature_immBlock(break_label);
4981 set_cur_block(break_label);
4983 assert(current_switch_cond == cond);
4984 current_switch = old_switch;
4985 current_switch_cond = old_switch_cond;
4986 break_label = old_break_label;
4987 saw_default_label = old_saw_default_label;
4990 static void case_label_to_firm(const case_label_statement_t *statement)
4992 if (statement->is_empty_range)
4995 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4997 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5000 ir_node *block = new_immBlock();
5002 set_cur_block(get_nodes_block(current_switch_cond));
5003 if (statement->expression != NULL) {
5004 long pn = statement->first_case;
5005 long end_pn = statement->last_case;
5006 assert(pn <= end_pn);
5007 /* create jumps for all cases in the given range */
5009 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5010 add_immBlock_pred(block, proj);
5011 } while(pn++ < end_pn);
5013 saw_default_label = true;
5014 proj = new_d_defaultProj(dbgi, current_switch_cond,
5015 current_switch->default_proj_nr);
5017 add_immBlock_pred(block, proj);
5020 if (fallthrough != NULL) {
5021 add_immBlock_pred(block, fallthrough);
5023 mature_immBlock(block);
5024 set_cur_block(block);
5026 if (statement->statement != NULL) {
5027 statement_to_firm(statement->statement);
5031 static void label_to_firm(const label_statement_t *statement)
5033 ir_node *block = get_label_block(statement->label);
5035 if (get_cur_block() != NULL) {
5036 ir_node *jmp = new_Jmp();
5037 add_immBlock_pred(block, jmp);
5040 set_cur_block(block);
5042 keep_all_memory(block);
5044 if (statement->statement != NULL) {
5045 statement_to_firm(statement->statement);
5049 static void goto_to_firm(const goto_statement_t *statement)
5051 if (get_cur_block() == NULL)
5054 if (statement->expression) {
5055 ir_node *irn = expression_to_firm(statement->expression);
5056 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5057 ir_node *ijmp = new_d_IJmp(dbgi, irn);
5059 set_irn_link(ijmp, ijmp_list);
5062 ir_node *block = get_label_block(statement->label);
5063 ir_node *jmp = new_Jmp();
5064 add_immBlock_pred(block, jmp);
5066 set_cur_block(NULL);
5069 static void asm_statement_to_firm(const asm_statement_t *statement)
5071 bool needs_memory = false;
5073 if (statement->is_volatile) {
5074 needs_memory = true;
5077 size_t n_clobbers = 0;
5078 asm_clobber_t *clobber = statement->clobbers;
5079 for ( ; clobber != NULL; clobber = clobber->next) {
5080 const char *clobber_str = clobber->clobber.begin;
5082 if (!be_is_valid_clobber(clobber_str)) {
5083 errorf(&statement->base.source_position,
5084 "invalid clobber '%s' specified", clobber->clobber);
5088 if (strcmp(clobber_str, "memory") == 0) {
5089 needs_memory = true;
5093 ident *id = new_id_from_str(clobber_str);
5094 obstack_ptr_grow(&asm_obst, id);
5097 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5098 ident **clobbers = NULL;
5099 if (n_clobbers > 0) {
5100 clobbers = obstack_finish(&asm_obst);
5103 size_t n_inputs = 0;
5104 asm_argument_t *argument = statement->inputs;
5105 for ( ; argument != NULL; argument = argument->next)
5107 size_t n_outputs = 0;
5108 argument = statement->outputs;
5109 for ( ; argument != NULL; argument = argument->next)
5112 unsigned next_pos = 0;
5114 ir_node *ins[n_inputs + n_outputs + 1];
5117 ir_asm_constraint tmp_in_constraints[n_outputs];
5119 const expression_t *out_exprs[n_outputs];
5120 ir_node *out_addrs[n_outputs];
5121 size_t out_size = 0;
5123 argument = statement->outputs;
5124 for ( ; argument != NULL; argument = argument->next) {
5125 const char *constraints = argument->constraints.begin;
5126 asm_constraint_flags_t asm_flags
5127 = be_parse_asm_constraints(constraints);
5129 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5130 warningf(&statement->base.source_position,
5131 "some constraints in '%s' are not supported", constraints);
5133 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5134 errorf(&statement->base.source_position,
5135 "some constraints in '%s' are invalid", constraints);
5138 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5139 errorf(&statement->base.source_position,
5140 "no write flag specified for output constraints '%s'",
5145 unsigned pos = next_pos++;
5146 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5147 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5148 expression_t *expr = argument->expression;
5149 ir_node *addr = expression_to_addr(expr);
5150 /* in+output, construct an artifical same_as constraint on the
5152 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5154 ir_node *value = get_value_from_lvalue(expr, addr);
5156 snprintf(buf, sizeof(buf), "%u", pos);
5158 ir_asm_constraint constraint;
5159 constraint.pos = pos;
5160 constraint.constraint = new_id_from_str(buf);
5161 constraint.mode = get_ir_mode_storage(expr->base.type);
5162 tmp_in_constraints[in_size] = constraint;
5163 ins[in_size] = value;
5168 out_exprs[out_size] = expr;
5169 out_addrs[out_size] = addr;
5171 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5172 /* pure memory ops need no input (but we have to make sure we
5173 * attach to the memory) */
5174 assert(! (asm_flags &
5175 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5176 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5177 needs_memory = true;
5179 /* we need to attach the address to the inputs */
5180 expression_t *expr = argument->expression;
5182 ir_asm_constraint constraint;
5183 constraint.pos = pos;
5184 constraint.constraint = new_id_from_str(constraints);
5185 constraint.mode = NULL;
5186 tmp_in_constraints[in_size] = constraint;
5188 ins[in_size] = expression_to_addr(expr);
5192 errorf(&statement->base.source_position,
5193 "only modifiers but no place set in constraints '%s'",
5198 ir_asm_constraint constraint;
5199 constraint.pos = pos;
5200 constraint.constraint = new_id_from_str(constraints);
5201 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5203 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5205 assert(obstack_object_size(&asm_obst)
5206 == out_size * sizeof(ir_asm_constraint));
5207 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5210 obstack_grow(&asm_obst, tmp_in_constraints,
5211 in_size * sizeof(tmp_in_constraints[0]));
5212 /* find and count input and output arguments */
5213 argument = statement->inputs;
5214 for ( ; argument != NULL; argument = argument->next) {
5215 const char *constraints = argument->constraints.begin;
5216 asm_constraint_flags_t asm_flags
5217 = be_parse_asm_constraints(constraints);
5219 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5220 errorf(&statement->base.source_position,
5221 "some constraints in '%s' are not supported", constraints);
5224 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5225 errorf(&statement->base.source_position,
5226 "some constraints in '%s' are invalid", constraints);
5229 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5230 errorf(&statement->base.source_position,
5231 "write flag specified for input constraints '%s'",
5237 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5238 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5239 /* we can treat this as "normal" input */
5240 input = expression_to_firm(argument->expression);
5241 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5242 /* pure memory ops need no input (but we have to make sure we
5243 * attach to the memory) */
5244 assert(! (asm_flags &
5245 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5246 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5247 needs_memory = true;
5248 input = expression_to_addr(argument->expression);
5250 errorf(&statement->base.source_position,
5251 "only modifiers but no place set in constraints '%s'",
5256 ir_asm_constraint constraint;
5257 constraint.pos = next_pos++;
5258 constraint.constraint = new_id_from_str(constraints);
5259 constraint.mode = get_irn_mode(input);
5261 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5262 ins[in_size++] = input;
5266 ir_asm_constraint constraint;
5267 constraint.pos = next_pos++;
5268 constraint.constraint = new_id_from_str("");
5269 constraint.mode = mode_M;
5271 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5272 ins[in_size++] = get_store();
5275 assert(obstack_object_size(&asm_obst)
5276 == in_size * sizeof(ir_asm_constraint));
5277 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5279 /* create asm node */
5280 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5282 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5284 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5285 out_size, output_constraints,
5286 n_clobbers, clobbers, asm_text);
5288 if (statement->is_volatile) {
5289 set_irn_pinned(node, op_pin_state_pinned);
5291 set_irn_pinned(node, op_pin_state_floats);
5294 /* create output projs & connect them */
5296 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5301 for (i = 0; i < out_size; ++i) {
5302 const expression_t *out_expr = out_exprs[i];
5304 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5305 ir_node *proj = new_Proj(node, mode, pn);
5306 ir_node *addr = out_addrs[i];
5308 set_value_for_expression_addr(out_expr, proj, addr);
5312 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5314 statement_to_firm(statement->try_statement);
5315 warningf(&statement->base.source_position, "structured exception handling ignored");
5318 static void leave_statement_to_firm(leave_statement_t *statement)
5320 errorf(&statement->base.source_position, "__leave not supported yet");
5324 * Transform a statement.
5326 static void statement_to_firm(statement_t *statement)
5329 assert(!statement->base.transformed);
5330 statement->base.transformed = true;
5333 switch (statement->kind) {
5334 case STATEMENT_INVALID:
5335 panic("invalid statement found");
5336 case STATEMENT_EMPTY:
5339 case STATEMENT_COMPOUND:
5340 compound_statement_to_firm(&statement->compound);
5342 case STATEMENT_RETURN:
5343 return_statement_to_firm(&statement->returns);
5345 case STATEMENT_EXPRESSION:
5346 expression_statement_to_firm(&statement->expression);
5349 if_statement_to_firm(&statement->ifs);
5351 case STATEMENT_WHILE:
5352 while_statement_to_firm(&statement->whiles);
5354 case STATEMENT_DO_WHILE:
5355 do_while_statement_to_firm(&statement->do_while);
5357 case STATEMENT_DECLARATION:
5358 declaration_statement_to_firm(&statement->declaration);
5360 case STATEMENT_BREAK:
5361 create_jump_statement(statement, get_break_label());
5363 case STATEMENT_CONTINUE:
5364 create_jump_statement(statement, continue_label);
5366 case STATEMENT_SWITCH:
5367 switch_statement_to_firm(&statement->switchs);
5369 case STATEMENT_CASE_LABEL:
5370 case_label_to_firm(&statement->case_label);
5373 for_statement_to_firm(&statement->fors);
5375 case STATEMENT_LABEL:
5376 label_to_firm(&statement->label);
5378 case STATEMENT_GOTO:
5379 goto_to_firm(&statement->gotos);
5382 asm_statement_to_firm(&statement->asms);
5384 case STATEMENT_MS_TRY:
5385 ms_try_statement_to_firm(&statement->ms_try);
5387 case STATEMENT_LEAVE:
5388 leave_statement_to_firm(&statement->leave);
5391 panic("statement not implemented");
5394 static int count_local_variables(const entity_t *entity,
5395 const entity_t *const last)
5398 entity_t const *const end = last != NULL ? last->base.next : NULL;
5399 for (; entity != end; entity = entity->base.next) {
5403 if (entity->kind == ENTITY_VARIABLE) {
5404 type = skip_typeref(entity->declaration.type);
5405 address_taken = entity->variable.address_taken;
5406 } else if (entity->kind == ENTITY_PARAMETER) {
5407 type = skip_typeref(entity->declaration.type);
5408 address_taken = entity->parameter.address_taken;
5413 if (!address_taken && is_type_scalar(type))
5419 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5421 int *const count = env;
5423 switch (stmt->kind) {
5424 case STATEMENT_DECLARATION: {
5425 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5426 *count += count_local_variables(decl_stmt->declarations_begin,
5427 decl_stmt->declarations_end);
5432 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5440 static int get_function_n_local_vars(entity_t *entity)
5444 /* count parameters */
5445 count += count_local_variables(entity->function.parameters.entities, NULL);
5447 /* count local variables declared in body */
5448 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5453 static void initialize_function_parameters(entity_t *entity)
5455 assert(entity->kind == ENTITY_FUNCTION);
5456 ir_graph *irg = current_ir_graph;
5457 ir_node *args = get_irg_args(irg);
5458 ir_node *start_block = get_irg_start_block(irg);
5459 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5462 entity_t *parameter = entity->function.parameters.entities;
5463 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5464 if (parameter->kind != ENTITY_PARAMETER)
5467 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5468 type_t *type = skip_typeref(parameter->declaration.type);
5470 bool needs_entity = parameter->parameter.address_taken;
5471 assert(!is_type_array(type));
5472 if (is_type_compound(type)) {
5473 needs_entity = true;
5477 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5478 ident *id = new_id_from_str(parameter->base.symbol->string);
5479 set_entity_ident(entity, id);
5481 parameter->declaration.kind
5482 = DECLARATION_KIND_PARAMETER_ENTITY;
5483 parameter->parameter.v.entity = entity;
5487 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5488 ir_mode *param_mode = get_type_mode(param_irtype);
5491 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5493 ir_mode *mode = get_ir_mode_storage(type);
5494 value = create_conv(NULL, value, mode);
5495 value = do_strict_conv(NULL, value);
5497 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5498 parameter->parameter.v.value_number = next_value_number_function;
5499 set_irg_loc_description(current_ir_graph, next_value_number_function,
5501 ++next_value_number_function;
5503 set_value(parameter->parameter.v.value_number, value);
5508 * Handle additional decl modifiers for IR-graphs
5510 * @param irg the IR-graph
5511 * @param dec_modifiers additional modifiers
5513 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5515 if (decl_modifiers & DM_RETURNS_TWICE) {
5516 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5517 set_irg_additional_property(irg, mtp_property_returns_twice);
5519 if (decl_modifiers & DM_NORETURN) {
5520 /* TRUE if the declaration includes the Microsoft
5521 __declspec(noreturn) specifier. */
5522 set_irg_additional_property(irg, mtp_property_noreturn);
5524 if (decl_modifiers & DM_NOTHROW) {
5525 /* TRUE if the declaration includes the Microsoft
5526 __declspec(nothrow) specifier. */
5527 set_irg_additional_property(irg, mtp_property_nothrow);
5529 if (decl_modifiers & DM_NAKED) {
5530 /* TRUE if the declaration includes the Microsoft
5531 __declspec(naked) specifier. */
5532 set_irg_additional_property(irg, mtp_property_naked);
5534 if (decl_modifiers & DM_FORCEINLINE) {
5535 /* TRUE if the declaration includes the
5536 Microsoft __forceinline specifier. */
5537 set_irg_inline_property(irg, irg_inline_forced);
5539 if (decl_modifiers & DM_NOINLINE) {
5540 /* TRUE if the declaration includes the Microsoft
5541 __declspec(noinline) specifier. */
5542 set_irg_inline_property(irg, irg_inline_forbidden);
5546 static void add_function_pointer(ir_type *segment, ir_entity *method,
5547 const char *unique_template)
5549 ir_type *method_type = get_entity_type(method);
5550 ident *id = id_unique(unique_template);
5551 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5553 ident *ide = id_unique(unique_template);
5554 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5555 ir_graph *irg = get_const_code_irg();
5556 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5559 set_entity_compiler_generated(ptr, 1);
5560 set_entity_variability(ptr, variability_constant);
5561 set_atomic_ent_value(ptr, val);
5565 * Generate possible IJmp branches to a given label block.
5567 static void gen_ijmp_branches(ir_node *block)
5570 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5571 add_immBlock_pred(block, ijmp);
5576 * Create code for a function.
5578 static void create_function(entity_t *entity)
5580 assert(entity->kind == ENTITY_FUNCTION);
5581 ir_entity *function_entity = get_function_entity(entity);
5583 if (entity->function.statement == NULL)
5586 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5587 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5588 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5590 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5591 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5592 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5595 current_function_entity = entity;
5596 current_function_name = NULL;
5597 current_funcsig = NULL;
5599 assert(all_labels == NULL);
5600 all_labels = NEW_ARR_F(label_t *, 0);
5603 int n_local_vars = get_function_n_local_vars(entity);
5604 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5606 ir_graph *old_current_function = current_function;
5607 current_function = irg;
5609 set_irg_fp_model(irg, firm_opt.fp_model);
5610 tarval_enable_fp_ops(1);
5611 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5613 ir_node *first_block = get_cur_block();
5615 /* set inline flags */
5616 if (entity->function.is_inline)
5617 set_irg_inline_property(irg, irg_inline_recomended);
5618 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5620 next_value_number_function = 0;
5621 initialize_function_parameters(entity);
5623 statement_to_firm(entity->function.statement);
5625 ir_node *end_block = get_irg_end_block(irg);
5627 /* do we have a return statement yet? */
5628 if (get_cur_block() != NULL) {
5629 type_t *type = skip_typeref(entity->declaration.type);
5630 assert(is_type_function(type));
5631 const function_type_t *func_type = &type->function;
5632 const type_t *return_type
5633 = skip_typeref(func_type->return_type);
5636 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5637 ret = new_Return(get_store(), 0, NULL);
5640 if (is_type_scalar(return_type)) {
5641 mode = get_ir_mode_storage(func_type->return_type);
5647 /* ยง5.1.2.2.3 main implicitly returns 0 */
5648 if (is_main(entity)) {
5649 in[0] = new_Const(get_mode_null(mode));
5651 in[0] = new_Unknown(mode);
5653 ret = new_Return(get_store(), 1, in);
5655 add_immBlock_pred(end_block, ret);
5658 bool has_computed_gotos = false;
5659 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5660 label_t *label = all_labels[i];
5661 if (label->address_taken) {
5662 gen_ijmp_branches(label->block);
5663 has_computed_gotos = true;
5665 mature_immBlock(label->block);
5667 if (has_computed_gotos) {
5668 /* if we have computed goto's in the function, we cannot inline it */
5669 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5670 warningf(&entity->base.source_position,
5671 "function '%Y' can never be inlined because it contains a computed goto",
5672 entity->base.symbol);
5674 set_irg_inline_property(irg, irg_inline_forbidden);
5677 DEL_ARR_F(all_labels);
5680 mature_immBlock(first_block);
5681 mature_immBlock(end_block);
5683 irg_finalize_cons(irg);
5685 /* finalize the frame type */
5686 ir_type *frame_type = get_irg_frame_type(irg);
5687 int n = get_compound_n_members(frame_type);
5690 for (int i = 0; i < n; ++i) {
5691 ir_entity *entity = get_compound_member(frame_type, i);
5692 ir_type *entity_type = get_entity_type(entity);
5694 int align = get_type_alignment_bytes(entity_type);
5695 if (align > align_all)
5699 misalign = offset % align;
5701 offset += align - misalign;
5705 set_entity_offset(entity, offset);
5706 offset += get_type_size_bytes(entity_type);
5708 set_type_size_bytes(frame_type, offset);
5709 set_type_alignment_bytes(frame_type, align_all);
5712 current_function = old_current_function;
5714 /* create inner functions */
5716 for (inner = next_inner_function(); inner != NULL;
5717 inner = next_inner_function()) {
5718 create_function(inner);
5722 static void scope_to_firm(scope_t *scope)
5724 /* first pass: create declarations */
5725 entity_t *entity = scope->entities;
5726 for ( ; entity != NULL; entity = entity->base.next) {
5727 if (entity->base.symbol == NULL)
5730 if (entity->kind == ENTITY_FUNCTION) {
5731 if (entity->function.btk != bk_none) {
5732 /* builtins have no representation */
5735 get_function_entity(entity);
5736 } else if (entity->kind == ENTITY_VARIABLE) {
5737 create_global_variable(entity);
5741 /* second pass: create code/initializers */
5742 entity = scope->entities;
5743 for ( ; entity != NULL; entity = entity->base.next) {
5744 if (entity->base.symbol == NULL)
5747 if (entity->kind == ENTITY_FUNCTION) {
5748 if (entity->function.btk != bk_none) {
5749 /* builtins have no representation */
5752 create_function(entity);
5753 } else if (entity->kind == ENTITY_VARIABLE) {
5754 assert(entity->declaration.kind
5755 == DECLARATION_KIND_GLOBAL_VARIABLE);
5756 current_ir_graph = get_const_code_irg();
5757 create_variable_initializer(entity);
5762 void init_ast2firm(void)
5764 obstack_init(&asm_obst);
5765 init_atomic_modes();
5767 /* OS option must be set to the backend */
5768 switch (firm_opt.os_support) {
5769 case OS_SUPPORT_MINGW:
5770 create_ld_ident = create_name_win32;
5772 case OS_SUPPORT_LINUX:
5773 create_ld_ident = create_name_linux_elf;
5775 case OS_SUPPORT_MACHO:
5776 create_ld_ident = create_name_macho;
5779 panic("unexpected OS support mode");
5782 /* create idents for all known runtime functions */
5783 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5784 rts_idents[i] = new_id_from_str(rts_data[i].name);
5787 entitymap_init(&entitymap);
5790 static void init_ir_types(void)
5792 static int ir_types_initialized = 0;
5793 if (ir_types_initialized)
5795 ir_types_initialized = 1;
5797 ir_type_int = get_ir_type(type_int);
5798 ir_type_const_char = get_ir_type(type_const_char);
5799 ir_type_wchar_t = get_ir_type(type_wchar_t);
5800 ir_type_void = get_ir_type(type_void);
5802 const backend_params *be_params = be_get_backend_param();
5803 mode_float_arithmetic = be_params->mode_float_arithmetic;
5806 void exit_ast2firm(void)
5808 entitymap_destroy(&entitymap);
5809 obstack_free(&asm_obst, NULL);
5812 static void global_asm_to_firm(statement_t *s)
5814 for (; s != NULL; s = s->base.next) {
5815 assert(s->kind == STATEMENT_ASM);
5817 char const *const text = s->asms.asm_text.begin;
5818 size_t size = s->asms.asm_text.size;
5820 /* skip the last \0 */
5821 if (text[size - 1] == '\0')
5824 ident *const id = new_id_from_chars(text, size);
5829 void translation_unit_to_firm(translation_unit_t *unit)
5831 /* just to be sure */
5832 continue_label = NULL;
5834 current_switch_cond = NULL;
5835 current_translation_unit = unit;
5838 inner_functions = NEW_ARR_F(entity_t *, 0);
5840 scope_to_firm(&unit->scope);
5841 global_asm_to_firm(unit->global_asm);
5843 DEL_ARR_F(inner_functions);
5844 inner_functions = NULL;
5846 current_ir_graph = NULL;
5847 current_translation_unit = NULL;