2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
41 #include "diagnostic.h"
42 #include "lang_features.h"
44 #include "type_hash.h"
46 #include "walk_statements.h"
48 #include "entitymap_t.h"
49 #include "driver/firm_opt.h"
50 #include "driver/firm_cmdline.h"
52 static ir_type *ir_type_const_char;
53 static ir_type *ir_type_wchar_t;
54 static ir_type *ir_type_void;
55 static ir_type *ir_type_int;
57 static int next_value_number_function;
58 static ir_node *continue_label;
59 static ir_node *break_label;
60 static ir_node *current_switch_cond;
61 static bool saw_default_label;
62 static label_t **all_labels;
63 static entity_t **inner_functions;
64 static ir_node *ijmp_list;
65 static bool constant_folding;
67 extern bool have_const_functions;
69 static const entity_t *current_function_entity;
70 static ir_node *current_function_name;
71 static ir_node *current_funcsig;
72 static switch_statement_t *current_switch;
73 static ir_graph *current_function;
74 static translation_unit_t *current_translation_unit;
76 static entitymap_t entitymap;
78 static struct obstack asm_obst;
80 typedef enum declaration_kind_t {
81 DECLARATION_KIND_UNKNOWN,
82 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
83 DECLARATION_KIND_GLOBAL_VARIABLE,
84 DECLARATION_KIND_LOCAL_VARIABLE,
85 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
86 DECLARATION_KIND_FUNCTION,
87 DECLARATION_KIND_COMPOUND_MEMBER,
88 DECLARATION_KIND_INNER_FUNCTION
91 static ir_mode *get_ir_mode(type_t *type);
92 static ir_type *get_ir_type_incomplete(type_t *type);
94 static void enqueue_inner_function(entity_t *entity)
96 ARR_APP1(entity_t*, inner_functions, entity);
99 static entity_t *next_inner_function(void)
101 int len = ARR_LEN(inner_functions);
105 entity_t *entity = inner_functions[len-1];
106 ARR_SHRINKLEN(inner_functions, len-1);
111 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
113 const variable_t *variable = get_irg_loc_description(irg, pos);
115 if (variable != NULL) {
116 warningf(&variable->base.base.source_position,
117 "variable '%#T' might be used uninitialized",
118 variable->base.type, variable->base.base.symbol);
120 return new_r_Unknown(irg, mode);
123 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
125 const source_position_t *pos = (const source_position_t*) dbg;
128 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
132 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
134 const source_position_t *pos = (const source_position_t*) dbg;
139 return pos->input_name;
142 static dbg_info *get_dbg_info(const source_position_t *pos)
144 return (dbg_info*) pos;
147 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
149 static ir_mode *mode_int, *mode_uint;
151 static ir_node *_expression_to_firm(const expression_t *expression);
152 static ir_node *expression_to_firm(const expression_t *expression);
153 static void create_local_declaration(entity_t *entity);
155 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
157 unsigned flags = get_atomic_type_flags(kind);
158 unsigned size = get_atomic_type_size(kind);
159 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
160 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
163 unsigned bit_size = size * 8;
164 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
165 ir_mode_arithmetic arithmetic;
167 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
168 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
169 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
171 sort = irms_int_number;
172 arithmetic = irma_twos_complement;
174 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
175 snprintf(name, sizeof(name), "F%u", bit_size);
176 sort = irms_float_number;
177 arithmetic = irma_ieee754;
179 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
180 * a too big amount */
181 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
189 * Initialises the atomic modes depending on the machine size.
191 static void init_atomic_modes(void)
193 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
194 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
196 mode_int = atomic_modes[ATOMIC_TYPE_INT];
197 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
199 /* there's no real void type in firm */
200 atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
202 /* initialize pointer modes */
204 ir_mode_sort sort = irms_reference;
205 unsigned bit_size = machine_size;
207 ir_mode_arithmetic arithmetic = irma_twos_complement;
208 unsigned modulo_shift
209 = bit_size < machine_size ? machine_size : bit_size;
211 snprintf(name, sizeof(name), "p%u", machine_size);
212 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
215 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
216 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
218 /* Hmm, pointers should be machine size */
219 set_modeP_data(ptr_mode);
220 set_modeP_code(ptr_mode);
223 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
225 assert(kind <= ATOMIC_TYPE_LAST);
226 return atomic_modes[kind];
229 static unsigned get_compound_type_size(compound_type_t *type)
231 ir_type *irtype = get_ir_type((type_t*) type);
232 return get_type_size_bytes(irtype);
235 static unsigned get_array_type_size(array_type_t *type)
237 assert(!type->is_vla);
238 ir_type *irtype = get_ir_type((type_t*) type);
239 return get_type_size_bytes(irtype);
242 static unsigned get_type_size_const(type_t *type)
246 panic("error type occurred");
248 return get_atomic_type_size(type->atomic.akind);
250 return 2 * get_atomic_type_size(type->complex.akind);
252 return get_atomic_type_size(type->imaginary.akind);
254 return get_mode_size_bytes(mode_int);
255 case TYPE_COMPOUND_UNION:
256 case TYPE_COMPOUND_STRUCT:
257 return get_compound_type_size(&type->compound);
259 /* just a pointer to the function */
260 return get_mode_size_bytes(mode_P_code);
262 return get_mode_size_bytes(mode_P_data);
264 return get_array_type_size(&type->array);
266 return get_type_size_const(type->builtin.real_type);
268 panic("type size of bitfield request");
274 panic("Trying to determine size of invalid type");
277 static ir_node *get_type_size(type_t *type)
279 type = skip_typeref(type);
281 if (is_type_array(type) && type->array.is_vla) {
282 ir_node *size_node = type->array.size_node;
283 if (size_node == NULL) {
284 size_node = expression_to_firm(type->array.size_expression);
285 assert(!is_Const(size_node));
286 type->array.size_node = size_node;
289 ir_node *elem_size = get_type_size(type->array.element_type);
290 ir_mode *mode = get_irn_mode(size_node);
291 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
295 ir_mode *mode = get_ir_mode(type_size_t);
297 sym.type_p = get_ir_type(type);
298 return new_SymConst(mode, sym, symconst_type_size);
301 static unsigned count_parameters(const function_type_t *function_type)
305 function_parameter_t *parameter = function_type->parameters;
306 for ( ; parameter != NULL; parameter = parameter->next) {
314 * Creates a Firm type for an atomic type
316 static ir_type *create_atomic_type(const atomic_type_t *type)
318 atomic_type_kind_t kind = type->akind;
319 ir_mode *mode = atomic_modes[kind];
320 ident *id = get_mode_ident(mode);
321 ir_type *irtype = new_type_primitive(id, mode);
323 set_type_alignment_bytes(irtype, type->base.alignment);
329 * Creates a Firm type for a complex type
331 static ir_type *create_complex_type(const complex_type_t *type)
333 atomic_type_kind_t kind = type->akind;
334 ir_mode *mode = atomic_modes[kind];
335 ident *id = get_mode_ident(mode);
339 /* FIXME: finish the array */
344 * Creates a Firm type for an imaginary type
346 static ir_type *create_imaginary_type(const imaginary_type_t *type)
348 atomic_type_kind_t kind = type->akind;
349 ir_mode *mode = atomic_modes[kind];
350 ident *id = get_mode_ident(mode);
351 ir_type *irtype = new_type_primitive(id, mode);
353 set_type_alignment_bytes(irtype, type->base.alignment);
359 * return type of a parameter (and take transparent union gnu extension into
362 static type_t *get_parameter_type(type_t *type)
364 type = skip_typeref(type);
365 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
366 compound_t *compound = type->compound.compound;
367 type = compound->members.entities->declaration.type;
373 static ir_type *create_method_type(const function_type_t *function_type)
375 type_t *return_type = skip_typeref(function_type->return_type);
377 ident *id = id_unique("functiontype.%u");
378 int n_parameters = count_parameters(function_type);
379 int n_results = return_type == type_void ? 0 : 1;
380 ir_type *irtype = new_type_method(id, n_parameters, n_results);
382 if (return_type != type_void) {
383 ir_type *restype = get_ir_type(return_type);
384 set_method_res_type(irtype, 0, restype);
387 function_parameter_t *parameter = function_type->parameters;
389 for ( ; parameter != NULL; parameter = parameter->next) {
390 type_t *type = get_parameter_type(parameter->type);
391 ir_type *p_irtype = get_ir_type(type);
392 set_method_param_type(irtype, n, p_irtype);
396 if (function_type->variadic || function_type->unspecified_parameters) {
397 set_method_variadicity(irtype, variadicity_variadic);
400 unsigned cc = get_method_calling_convention(irtype);
401 switch (function_type->calling_convention) {
402 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
405 set_method_calling_convention(irtype, SET_CDECL(cc));
409 if (function_type->variadic || function_type->unspecified_parameters)
412 /* only non-variadic function can use stdcall, else use cdecl */
413 set_method_calling_convention(irtype, SET_STDCALL(cc));
417 if (function_type->variadic || function_type->unspecified_parameters)
419 /* only non-variadic function can use fastcall, else use cdecl */
420 set_method_calling_convention(irtype, SET_FASTCALL(cc));
424 /* Hmm, leave default, not accepted by the parser yet. */
431 static ir_type *create_pointer_type(pointer_type_t *type)
433 type_t *points_to = type->points_to;
434 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
435 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
436 ir_points_to, mode_P_data);
441 static ir_type *create_array_type(array_type_t *type)
443 type_t *element_type = type->element_type;
444 ir_type *ir_element_type = get_ir_type(element_type);
446 ident *id = id_unique("array.%u");
447 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
449 const int align = get_type_alignment_bytes(ir_element_type);
450 set_type_alignment_bytes(ir_type, align);
452 if (type->size_constant) {
453 int n_elements = type->size;
455 set_array_bounds_int(ir_type, 0, 0, n_elements);
457 size_t elemsize = get_type_size_bytes(ir_element_type);
458 if (elemsize % align > 0) {
459 elemsize += align - (elemsize % align);
461 set_type_size_bytes(ir_type, n_elements * elemsize);
463 set_array_lower_bound_int(ir_type, 0, 0);
465 set_type_state(ir_type, layout_fixed);
471 * Return the signed integer type of size bits.
473 * @param size the size
475 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
478 static ir_mode *s_modes[64 + 1] = {NULL, };
482 if (size <= 0 || size > 64)
485 mode = s_modes[size];
489 snprintf(name, sizeof(name), "bf_I%u", size);
490 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
491 size <= 32 ? 32 : size );
492 s_modes[size] = mode;
496 snprintf(name, sizeof(name), "I%u", size);
497 ident *id = new_id_from_str(name);
498 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
499 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
500 set_primitive_base_type(res, base_tp);
506 * Return the unsigned integer type of size bits.
508 * @param size the size
510 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
513 static ir_mode *u_modes[64 + 1] = {NULL, };
517 if (size <= 0 || size > 64)
520 mode = u_modes[size];
524 snprintf(name, sizeof(name), "bf_U%u", size);
525 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
526 size <= 32 ? 32 : size );
527 u_modes[size] = mode;
532 snprintf(name, sizeof(name), "U%u", size);
533 ident *id = new_id_from_str(name);
534 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
535 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
536 set_primitive_base_type(res, base_tp);
541 static ir_type *create_bitfield_type(bitfield_type_t *const type)
543 type_t *base = skip_typeref(type->base_type);
544 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
545 ir_type *irbase = get_ir_type(base);
547 unsigned size = type->bit_size;
549 assert(!is_type_float(base));
550 if (is_type_signed(base)) {
551 return get_signed_int_type_for_bit_size(irbase, size);
553 return get_unsigned_int_type_for_bit_size(irbase, size);
557 #define INVALID_TYPE ((ir_type_ptr)-1)
560 COMPOUND_IS_STRUCT = false,
561 COMPOUND_IS_UNION = true
565 * Construct firm type from ast struct type.
567 * As anonymous inner structs get flattened to a single firm type, we might get
568 * irtype, outer_offset and out_align passed (they represent the position of
569 * the anonymous inner struct inside the resulting firm struct)
571 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
572 size_t *outer_offset, size_t *outer_align,
573 bool incomplete, bool is_union)
575 compound_t *compound = type->compound;
577 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
578 return compound->irtype;
581 size_t align_all = 1;
583 size_t bit_offset = 0;
586 if (irtype == NULL) {
587 symbol_t *symbol = compound->base.symbol;
589 if (symbol != NULL) {
590 id = new_id_from_str(symbol->string);
593 id = id_unique("__anonymous_union.%u");
595 id = id_unique("__anonymous_struct.%u");
598 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
601 irtype = new_d_type_union(id, dbgi);
603 irtype = new_d_type_struct(id, dbgi);
606 compound->irtype_complete = false;
607 compound->irtype = irtype;
609 offset = *outer_offset;
610 align_all = *outer_align;
616 compound->irtype_complete = true;
618 entity_t *entry = compound->members.entities;
619 for ( ; entry != NULL; entry = entry->base.next) {
620 if (entry->kind != ENTITY_COMPOUND_MEMBER)
623 size_t prev_offset = offset;
625 symbol_t *symbol = entry->base.symbol;
626 type_t *entry_type = skip_typeref(entry->declaration.type);
627 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
630 if (symbol != NULL) {
631 ident = new_id_from_str(symbol->string);
633 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
634 create_compound_type(&entry_type->compound, irtype, &offset,
635 &align_all, false, COMPOUND_IS_STRUCT);
636 goto finished_member;
637 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
638 create_compound_type(&entry_type->compound, irtype, &offset,
639 &align_all, false, COMPOUND_IS_UNION);
640 goto finished_member;
642 assert(entry_type->kind == TYPE_BITFIELD);
644 ident = id_unique("anon.%u");
647 ir_type *base_irtype;
648 if (entry_type->kind == TYPE_BITFIELD) {
649 base_irtype = get_ir_type(entry_type->bitfield.base_type);
651 base_irtype = get_ir_type(entry_type);
654 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
655 size_t misalign = offset % entry_alignment;
657 ir_type *entry_irtype = get_ir_type(entry_type);
658 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
661 size_t bits_remainder;
662 if (entry_type->kind == TYPE_BITFIELD) {
663 size_t size_bits = entry_type->bitfield.bit_size;
664 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
666 if (size_bits > rest_size_bits) {
667 /* start a new bucket */
668 offset += entry_alignment - misalign;
674 /* put into current bucket */
675 base = offset - misalign;
676 bits_remainder = misalign * 8 + bit_offset;
679 offset += size_bits / 8;
680 bit_offset = bit_offset + (size_bits % 8);
682 size_t entry_size = get_type_size_bytes(base_irtype);
683 if (misalign > 0 || bit_offset > 0)
684 offset += entry_alignment - misalign;
688 offset += entry_size;
692 if (entry_alignment > align_all) {
693 if (entry_alignment % align_all != 0) {
694 panic("uneven alignments not supported yet");
696 align_all = entry_alignment;
699 set_entity_offset(entity, base);
700 set_entity_offset_bits_remainder(entity,
701 (unsigned char) bits_remainder);
702 //add_struct_member(irtype, entity);
703 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
704 assert(entry->compound_member.entity == NULL);
705 entry->compound_member.entity = entity;
709 size_t entry_size = offset - prev_offset;
710 if (entry_size > size) {
722 size_t misalign = offset % align_all;
723 if (misalign > 0 || bit_offset > 0) {
724 size += align_all - misalign;
727 if (outer_offset != NULL) {
729 *outer_offset = offset;
731 *outer_offset += size;
734 if (align_all > *outer_align) {
735 if (align_all % *outer_align != 0) {
736 panic("uneven alignments not supported yet");
738 *outer_align = align_all;
741 set_type_alignment_bytes(irtype, align_all);
742 set_type_size_bytes(irtype, size);
743 set_type_state(irtype, layout_fixed);
749 static ir_type *create_enum_type(enum_type_t *const type)
751 type->base.firm_type = ir_type_int;
753 ir_mode *const mode = mode_int;
754 tarval *const one = get_mode_one(mode);
755 tarval * tv_next = get_tarval_null(mode);
757 bool constant_folding_old = constant_folding;
758 constant_folding = true;
760 enum_t *enume = type->enume;
761 entity_t *entry = enume->base.next;
762 for (; entry != NULL; entry = entry->base.next) {
763 if (entry->kind != ENTITY_ENUM_VALUE)
766 expression_t *const init = entry->enum_value.value;
768 ir_node *const cnst = expression_to_firm(init);
769 if (!is_Const(cnst)) {
770 panic("couldn't fold constant");
772 tv_next = get_Const_tarval(cnst);
774 entry->enum_value.tv = tv_next;
775 tv_next = tarval_add(tv_next, one);
778 constant_folding = constant_folding_old;
783 static ir_type *get_ir_type_incomplete(type_t *type)
785 assert(type != NULL);
786 type = skip_typeref(type);
788 if (type->base.firm_type != NULL) {
789 assert(type->base.firm_type != INVALID_TYPE);
790 return type->base.firm_type;
793 switch (type->kind) {
794 case TYPE_COMPOUND_STRUCT:
795 return create_compound_type(&type->compound, NULL, NULL, NULL,
796 true, COMPOUND_IS_STRUCT);
797 case TYPE_COMPOUND_UNION:
798 return create_compound_type(&type->compound, NULL, NULL, NULL,
799 true, COMPOUND_IS_UNION);
801 return get_ir_type(type);
805 ir_type *get_ir_type(type_t *type)
807 assert(type != NULL);
809 type = skip_typeref(type);
811 if (type->base.firm_type != NULL) {
812 assert(type->base.firm_type != INVALID_TYPE);
813 return type->base.firm_type;
816 ir_type *firm_type = NULL;
817 switch (type->kind) {
819 /* Happens while constant folding, when there was an error */
820 return create_atomic_type(&type_void->atomic);
823 firm_type = create_atomic_type(&type->atomic);
826 firm_type = create_complex_type(&type->complex);
829 firm_type = create_imaginary_type(&type->imaginary);
832 firm_type = create_method_type(&type->function);
835 firm_type = create_pointer_type(&type->pointer);
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 ir_mode *get_ir_mode(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 /** Names of the runtime functions. */
885 static const struct {
886 int id; /**< the rts id */
887 int n_res; /**< number of return values */
888 const char *name; /**< the name of the rts function */
889 int n_params; /**< number of parameters */
890 unsigned flags; /**< language flags */
892 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
893 { rts_abort, 0, "abort", 0, _C89 },
894 { rts_alloca, 1, "alloca", 1, _ALL },
895 { rts_abs, 1, "abs", 1, _C89 },
896 { rts_labs, 1, "labs", 1, _C89 },
897 { rts_llabs, 1, "llabs", 1, _C99 },
898 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
900 { rts_fabs, 1, "fabs", 1, _C89 },
901 { rts_sqrt, 1, "sqrt", 1, _C89 },
902 { rts_cbrt, 1, "cbrt", 1, _C99 },
903 { rts_exp, 1, "exp", 1, _C89 },
904 { rts_exp2, 1, "exp2", 1, _C89 },
905 { rts_exp10, 1, "exp10", 1, _GNUC },
906 { rts_log, 1, "log", 1, _C89 },
907 { rts_log2, 1, "log2", 1, _C89 },
908 { rts_log10, 1, "log10", 1, _C89 },
909 { rts_pow, 1, "pow", 2, _C89 },
910 { rts_sin, 1, "sin", 1, _C89 },
911 { rts_cos, 1, "cos", 1, _C89 },
912 { rts_tan, 1, "tan", 1, _C89 },
913 { rts_asin, 1, "asin", 1, _C89 },
914 { rts_acos, 1, "acos", 1, _C89 },
915 { rts_atan, 1, "atan", 1, _C89 },
916 { rts_sinh, 1, "sinh", 1, _C89 },
917 { rts_cosh, 1, "cosh", 1, _C89 },
918 { rts_tanh, 1, "tanh", 1, _C89 },
920 { rts_fabsf, 1, "fabsf", 1, _C99 },
921 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
922 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
923 { rts_expf, 1, "expf", 1, _C99 },
924 { rts_exp2f, 1, "exp2f", 1, _C99 },
925 { rts_exp10f, 1, "exp10f", 1, _GNUC },
926 { rts_logf, 1, "logf", 1, _C99 },
927 { rts_log2f, 1, "log2f", 1, _C99 },
928 { rts_log10f, 1, "log10f", 1, _C99 },
929 { rts_powf, 1, "powf", 2, _C99 },
930 { rts_sinf, 1, "sinf", 1, _C99 },
931 { rts_cosf, 1, "cosf", 1, _C99 },
932 { rts_tanf, 1, "tanf", 1, _C99 },
933 { rts_asinf, 1, "asinf", 1, _C99 },
934 { rts_acosf, 1, "acosf", 1, _C99 },
935 { rts_atanf, 1, "atanf", 1, _C99 },
936 { rts_sinhf, 1, "sinhf", 1, _C99 },
937 { rts_coshf, 1, "coshf", 1, _C99 },
938 { rts_tanhf, 1, "tanhf", 1, _C99 },
940 { rts_fabsl, 1, "fabsl", 1, _C99 },
941 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
942 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
943 { rts_expl, 1, "expl", 1, _C99 },
944 { rts_exp2l, 1, "exp2l", 1, _C99 },
945 { rts_exp10l, 1, "exp10l", 1, _GNUC },
946 { rts_logl, 1, "logl", 1, _C99 },
947 { rts_log2l, 1, "log2l", 1, _C99 },
948 { rts_log10l, 1, "log10l", 1, _C99 },
949 { rts_powl, 1, "powl", 2, _C99 },
950 { rts_sinl, 1, "sinl", 1, _C99 },
951 { rts_cosl, 1, "cosl", 1, _C99 },
952 { rts_tanl, 1, "tanl", 1, _C99 },
953 { rts_asinl, 1, "asinl", 1, _C99 },
954 { rts_acosl, 1, "acosl", 1, _C99 },
955 { rts_atanl, 1, "atanl", 1, _C99 },
956 { rts_sinhl, 1, "sinhl", 1, _C99 },
957 { rts_coshl, 1, "coshl", 1, _C99 },
958 { rts_tanhl, 1, "tanhl", 1, _C99 },
960 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
961 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
962 { rts_strcmp, 1, "strcmp", 2, _C89 },
963 { rts_strncmp, 1, "strncmp", 3, _C89 }
966 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
968 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
971 * Handle GNU attributes for entities
973 * @param ent the entity
974 * @param decl the routine declaration
976 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
978 assert(is_declaration(entity));
979 decl_modifiers_t modifiers = entity->declaration.modifiers;
980 if (modifiers & DM_PURE) {
981 /* TRUE if the declaration includes the GNU
982 __attribute__((pure)) specifier. */
983 set_entity_additional_property(irentity, mtp_property_pure);
985 if (modifiers & DM_CONST) {
986 set_entity_additional_property(irentity, mtp_property_const);
987 have_const_functions = true;
989 if (modifiers & DM_USED) {
990 /* TRUE if the declaration includes the GNU
991 __attribute__((used)) specifier. */
992 set_entity_stickyness(irentity, stickyness_sticky);
996 static bool is_main(entity_t *entity)
998 static symbol_t *sym_main = NULL;
999 if (sym_main == NULL) {
1000 sym_main = symbol_table_insert("main");
1003 if (entity->base.symbol != sym_main)
1005 /* must be in outermost scope */
1006 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1013 * Creates an entity representing a function.
1015 * @param declaration the function declaration
1017 static ir_entity *get_function_entity(entity_t *entity)
1019 assert(entity->kind == ENTITY_FUNCTION);
1020 if (entity->function.entity != NULL) {
1021 return entity->function.entity;
1024 if (is_main(entity)) {
1025 /* force main to C linkage */
1026 type_t *type = entity->declaration.type;
1027 assert(is_type_function(type));
1028 if (type->function.linkage != LINKAGE_C) {
1029 type_t *new_type = duplicate_type(type);
1030 new_type->function.linkage = LINKAGE_C;
1032 type = typehash_insert(new_type);
1033 if (type != new_type) {
1034 obstack_free(type_obst, new_type);
1036 entity->declaration.type = type;
1040 symbol_t *symbol = entity->base.symbol;
1041 ident *id = new_id_from_str(symbol->string);
1043 ir_type *global_type = get_glob_type();
1044 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1045 bool const has_body = entity->function.statement != NULL;
1047 /* already an entity defined? */
1048 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1049 if (irentity != NULL) {
1050 if (get_entity_visibility(irentity) == visibility_external_allocated
1052 set_entity_visibility(irentity, visibility_external_visible);
1054 goto entity_created;
1057 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1058 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1059 set_entity_ld_ident(irentity, create_ld_ident(entity));
1061 handle_gnu_attributes_ent(irentity, entity);
1063 /* static inline => local
1064 * extern inline => local
1065 * inline without definition => local
1066 * inline with definition => external_visible */
1067 storage_class_tag_t const storage_class
1068 = (storage_class_tag_t) entity->declaration.storage_class;
1069 bool const is_inline = entity->function.is_inline;
1070 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1071 set_entity_visibility(irentity, visibility_external_visible);
1072 } else if (storage_class == STORAGE_CLASS_STATIC ||
1073 (is_inline && has_body)) {
1075 /* this entity was declared, but is defined nowhere */
1076 set_entity_peculiarity(irentity, peculiarity_description);
1078 set_entity_visibility(irentity, visibility_local);
1079 } else if (has_body) {
1080 set_entity_visibility(irentity, visibility_external_visible);
1082 set_entity_visibility(irentity, visibility_external_allocated);
1084 set_entity_allocation(irentity, allocation_static);
1086 /* We should check for file scope here, but as long as we compile C only
1087 this is not needed. */
1088 if (! firm_opt.freestanding) {
1089 /* check for a known runtime function */
1090 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1091 if (id != rts_idents[i])
1094 /* ignore those rts functions not necessary needed for current mode */
1095 if ((c_mode & rts_data[i].flags) == 0)
1097 assert(rts_entities[rts_data[i].id] == NULL);
1098 rts_entities[rts_data[i].id] = irentity;
1102 entitymap_insert(&entitymap, symbol, irentity);
1105 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1106 entity->function.entity = irentity;
1112 * Creates a Const node representing a constant.
1114 static ir_node *const_to_firm(const const_expression_t *cnst)
1116 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1117 ir_mode *mode = get_ir_mode(cnst->base.type);
1122 if (mode_is_float(mode)) {
1123 tv = new_tarval_from_double(cnst->v.float_value, mode);
1125 if (mode_is_signed(mode)) {
1126 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1128 len = snprintf(buf, sizeof(buf), "%llu",
1129 (unsigned long long) cnst->v.int_value);
1131 tv = new_tarval_from_str(buf, len, mode);
1134 return new_d_Const(dbgi, mode, tv);
1138 * Creates a Const node representing a character constant.
1140 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1142 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1143 ir_mode *mode = get_ir_mode(cnst->base.type);
1145 long long int v = 0;
1146 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1147 if (char_is_signed) {
1148 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1150 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1154 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1155 tarval *tv = new_tarval_from_str(buf, len, mode);
1157 return new_d_Const(dbgi, mode, tv);
1161 * Creates a Const node representing a wide character constant.
1163 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1165 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1166 ir_mode *mode = get_ir_mode(cnst->base.type);
1168 long long int v = cnst->v.wide_character.begin[0];
1171 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1172 tarval *tv = new_tarval_from_str(buf, len, mode);
1174 return new_d_Const(dbgi, mode, tv);
1178 * Creates a SymConst for a given entity.
1180 * @param dbgi debug info
1181 * @param mode the (reference) mode for the SymConst
1182 * @param entity the entity
1184 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1187 assert(entity != NULL);
1188 union symconst_symbol sym;
1189 sym.entity_p = entity;
1190 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1194 * Creates a SymConst node representing a string constant.
1196 * @param src_pos the source position of the string constant
1197 * @param id_prefix a prefix for the name of the generated string constant
1198 * @param value the value of the string constant
1200 static ir_node *string_to_firm(const source_position_t *const src_pos,
1201 const char *const id_prefix,
1202 const string_t *const value)
1204 ir_type *const global_type = get_glob_type();
1205 dbg_info *const dbgi = get_dbg_info(src_pos);
1206 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1207 ir_type_const_char, dbgi);
1209 ident *const id = id_unique(id_prefix);
1210 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1211 set_entity_ld_ident(entity, id);
1212 set_entity_variability(entity, variability_constant);
1213 set_entity_allocation(entity, allocation_static);
1215 ir_type *const elem_type = ir_type_const_char;
1216 ir_mode *const mode = get_type_mode(elem_type);
1218 const char* const string = value->begin;
1219 const size_t slen = value->size;
1221 set_array_lower_bound_int(type, 0, 0);
1222 set_array_upper_bound_int(type, 0, slen);
1223 set_type_size_bytes(type, slen);
1224 set_type_state(type, layout_fixed);
1226 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1227 for (size_t i = 0; i < slen; ++i) {
1228 tvs[i] = new_tarval_from_long(string[i], mode);
1231 set_array_entity_values(entity, tvs, slen);
1234 return create_symconst(dbgi, mode_P_data, entity);
1238 * Creates a SymConst node representing a string literal.
1240 * @param literal the string literal
1242 static ir_node *string_literal_to_firm(
1243 const string_literal_expression_t* literal)
1245 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1250 * Creates a SymConst node representing a wide string literal.
1252 * @param literal the wide string literal
1254 static ir_node *wide_string_literal_to_firm(
1255 const wide_string_literal_expression_t* const literal)
1257 ir_type *const global_type = get_glob_type();
1258 ir_type *const elem_type = ir_type_wchar_t;
1259 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1260 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1263 ident *const id = id_unique("Lstr.%u");
1264 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1265 set_entity_ld_ident(entity, id);
1266 set_entity_variability(entity, variability_constant);
1267 set_entity_allocation(entity, allocation_static);
1269 ir_mode *const mode = get_type_mode(elem_type);
1271 const wchar_rep_t *const string = literal->value.begin;
1272 const size_t slen = literal->value.size;
1274 set_array_lower_bound_int(type, 0, 0);
1275 set_array_upper_bound_int(type, 0, slen);
1276 set_type_size_bytes(type, slen);
1277 set_type_state(type, layout_fixed);
1279 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1280 for (size_t i = 0; i < slen; ++i) {
1281 tvs[i] = new_tarval_from_long(string[i], mode);
1284 set_array_entity_values(entity, tvs, slen);
1287 return create_symconst(dbgi, mode_P_data, entity);
1290 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1291 ir_node *const addr)
1293 ir_type *irtype = get_ir_type(type);
1294 if (is_compound_type(irtype)
1295 || is_Method_type(irtype)
1296 || is_Array_type(irtype)) {
1300 ir_mode *const mode = get_type_mode(irtype);
1301 ir_node *const memory = get_store();
1302 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1303 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1304 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1306 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1307 set_Load_volatility(load, volatility_is_volatile);
1310 set_store(load_mem);
1315 * Creates a strict Conv if neccessary.
1317 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1319 ir_mode *mode = get_irn_mode(node);
1321 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1323 if (!mode_is_float(mode))
1326 /* check if there is already a Conv */
1327 if (is_Conv(node)) {
1328 /* convert it into a strict Conv */
1329 set_Conv_strict(node, 1);
1333 /* otherwise create a new one */
1334 return new_d_strictConv(dbgi, node, mode);
1337 static ir_node *get_global_var_address(dbg_info *const dbgi,
1338 const entity_t *const entity)
1340 assert(entity->kind == ENTITY_VARIABLE);
1341 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1343 ir_entity *const irentity = entity->variable.v.entity;
1344 switch ((storage_class_tag_t) entity->declaration.storage_class) {
1345 case STORAGE_CLASS_THREAD:
1346 case STORAGE_CLASS_THREAD_EXTERN:
1347 case STORAGE_CLASS_THREAD_STATIC: {
1348 ir_node *const no_mem = new_NoMem();
1349 ir_node *const tls = get_irg_tls(current_ir_graph);
1350 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1354 return create_symconst(dbgi, mode_P_data, irentity);
1359 * Returns the correct base address depending on whether it is a parameter or a
1360 * normal local variable.
1362 static ir_node *get_local_frame(ir_entity *const ent)
1364 ir_graph *const irg = current_ir_graph;
1365 const ir_type *const owner = get_entity_owner(ent);
1366 if (owner == get_irg_frame_type(irg)) {
1367 return get_irg_frame(irg);
1369 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1370 return get_irg_value_param_base(irg);
1374 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1376 ir_mode *value_mode = get_irn_mode(value);
1378 if (value_mode == dest_mode || is_Bad(value))
1381 if (dest_mode == mode_b) {
1382 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1383 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1384 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1388 return new_d_Conv(dbgi, value, dest_mode);
1392 * Keep all memory edges of the given block.
1394 static void keep_all_memory(ir_node *block) {
1395 ir_node *old = get_cur_block();
1397 set_cur_block(block);
1398 keep_alive(get_store());
1399 /* TODO: keep all memory edges from restricted pointers */
1403 static ir_node *reference_expression_enum_value_to_firm(
1404 const reference_expression_t *ref)
1406 entity_t *entity = ref->entity;
1407 type_t *type = skip_typeref(entity->enum_value.enum_type);
1408 /* make sure the type is constructed */
1409 (void) get_ir_type(type);
1411 ir_mode *const mode = get_ir_mode(type);
1412 return new_Const(mode, entity->enum_value.tv);
1415 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1417 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1418 entity_t *entity = ref->entity;
1419 assert(is_declaration(entity));
1420 type_t *type = skip_typeref(entity->declaration.type);
1422 /* make sure the type is constructed */
1423 (void) get_ir_type(type);
1425 switch ((declaration_kind_t) entity->declaration.kind) {
1426 case DECLARATION_KIND_UNKNOWN:
1429 case DECLARATION_KIND_LOCAL_VARIABLE: {
1430 ir_mode *const mode = get_ir_mode(type);
1431 return get_value(entity->variable.v.value_number, mode);
1433 case DECLARATION_KIND_FUNCTION: {
1434 ir_mode *const mode = get_ir_mode(type);
1435 return create_symconst(dbgi, mode, entity->function.entity);
1437 case DECLARATION_KIND_INNER_FUNCTION: {
1438 ir_mode *const mode = get_ir_mode(type);
1439 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1440 /* inner function not using the closure */
1441 return create_symconst(dbgi, mode, entity->function.entity);
1443 /* TODO: need trampoline here */
1444 panic("Trampoline code not implemented");
1445 return create_symconst(dbgi, mode, entity->function.entity);
1448 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1449 ir_node *const addr = get_global_var_address(dbgi, entity);
1450 return deref_address(dbgi, entity->declaration.type, addr);
1453 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1454 ir_entity *irentity = entity->variable.v.entity;
1455 ir_node *frame = get_local_frame(irentity);
1456 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1457 return deref_address(dbgi, entity->declaration.type, sel);
1460 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1461 return entity->variable.v.vla_base;
1463 case DECLARATION_KIND_COMPOUND_MEMBER:
1464 panic("not implemented reference type");
1467 panic("reference to declaration with unknown type found");
1470 static ir_node *reference_addr(const reference_expression_t *ref)
1472 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1473 entity_t *entity = ref->entity;
1474 assert(is_declaration(entity));
1476 switch((declaration_kind_t) entity->declaration.kind) {
1477 case DECLARATION_KIND_UNKNOWN:
1479 case DECLARATION_KIND_LOCAL_VARIABLE:
1480 /* you can store to a local variable (so we don't panic but return NULL
1481 * as an indicator for no real address) */
1483 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1484 ir_node *const addr = get_global_var_address(dbgi, entity);
1487 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1488 ir_entity *irentity = entity->variable.v.entity;
1489 ir_node *frame = get_local_frame(irentity);
1490 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1495 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1496 return entity->variable.v.vla_base;
1498 case DECLARATION_KIND_FUNCTION: {
1499 type_t *const type = skip_typeref(entity->declaration.type);
1500 ir_mode *const mode = get_ir_mode(type);
1501 return create_symconst(dbgi, mode, entity->function.entity);
1504 case DECLARATION_KIND_INNER_FUNCTION:
1505 case DECLARATION_KIND_COMPOUND_MEMBER:
1506 panic("not implemented reference type");
1509 panic("reference to declaration with unknown type found");
1513 * Transform calls to builtin functions.
1515 static ir_node *process_builtin_call(const call_expression_t *call)
1517 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1519 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1520 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1522 type_t *type = skip_typeref(builtin->base.type);
1523 assert(is_type_pointer(type));
1525 type_t *function_type = skip_typeref(type->pointer.points_to);
1526 symbol_t *symbol = builtin->symbol;
1528 switch(symbol->ID) {
1529 case T___builtin_alloca: {
1530 if (call->arguments == NULL || call->arguments->next != NULL) {
1531 panic("invalid number of parameters on __builtin_alloca");
1533 expression_t *argument = call->arguments->expression;
1534 ir_node *size = expression_to_firm(argument);
1536 ir_node *store = get_store();
1537 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1539 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1541 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1546 case T___builtin_huge_val:
1547 case T___builtin_inf:
1548 case T___builtin_inff:
1549 case T___builtin_infl: {
1550 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1551 tarval *tv = get_mode_infinite(mode);
1552 ir_node *res = new_d_Const(dbgi, mode, tv);
1555 case T___builtin_nan:
1556 case T___builtin_nanf:
1557 case T___builtin_nanl: {
1558 /* Ignore string for now... */
1559 assert(is_type_function(function_type));
1560 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1561 tarval *tv = get_mode_NAN(mode);
1562 ir_node *res = new_d_Const(dbgi, mode, tv);
1565 case T___builtin_va_end:
1568 panic("Unsupported builtin found\n");
1573 * Transform a call expression.
1574 * Handles some special cases, like alloca() calls, which must be resolved
1575 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1576 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1579 static ir_node *call_expression_to_firm(const call_expression_t *call)
1581 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1582 assert(get_cur_block() != NULL);
1584 expression_t *function = call->function;
1585 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1586 return process_builtin_call(call);
1588 if (function->kind == EXPR_REFERENCE) {
1589 const reference_expression_t *ref = &function->reference;
1590 entity_t *entity = ref->entity;
1592 if (entity->kind == ENTITY_FUNCTION
1593 && entity->function.entity == rts_entities[rts_alloca]) {
1594 /* handle alloca() call */
1595 expression_t *argument = call->arguments->expression;
1596 ir_node *size = expression_to_firm(argument);
1598 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1600 ir_node *store = get_store();
1601 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1602 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1604 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1606 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1611 ir_node *callee = expression_to_firm(function);
1613 type_t *type = skip_typeref(function->base.type);
1614 assert(is_type_pointer(type));
1615 pointer_type_t *pointer_type = &type->pointer;
1616 type_t *points_to = skip_typeref(pointer_type->points_to);
1617 assert(is_type_function(points_to));
1618 function_type_t *function_type = &points_to->function;
1620 int n_parameters = 0;
1621 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1622 ir_type *new_method_type = NULL;
1623 if (function_type->variadic || function_type->unspecified_parameters) {
1624 const call_argument_t *argument = call->arguments;
1625 for ( ; argument != NULL; argument = argument->next) {
1629 /* we need to construct a new method type matching the call
1631 int n_res = get_method_n_ress(ir_method_type);
1632 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1633 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1634 n_parameters, n_res, dbgi);
1635 set_method_calling_convention(new_method_type,
1636 get_method_calling_convention(ir_method_type));
1637 set_method_additional_properties(new_method_type,
1638 get_method_additional_properties(ir_method_type));
1639 set_method_variadicity(new_method_type,
1640 get_method_variadicity(ir_method_type));
1642 for (int i = 0; i < n_res; ++i) {
1643 set_method_res_type(new_method_type, i,
1644 get_method_res_type(ir_method_type, i));
1646 argument = call->arguments;
1647 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1648 expression_t *expression = argument->expression;
1649 ir_type *irtype = get_ir_type(expression->base.type);
1650 set_method_param_type(new_method_type, i, irtype);
1652 ir_method_type = new_method_type;
1654 n_parameters = get_method_n_params(ir_method_type);
1657 ir_node *in[n_parameters];
1659 const call_argument_t *argument = call->arguments;
1660 for (int n = 0; n < n_parameters; ++n) {
1661 expression_t *expression = argument->expression;
1662 ir_node *arg_node = expression_to_firm(expression);
1664 arg_node = do_strict_conv(dbgi, arg_node);
1668 argument = argument->next;
1671 ir_node *store = get_store();
1672 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1674 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1677 type_t *return_type = skip_typeref(function_type->return_type);
1678 ir_node *result = NULL;
1680 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1682 if (is_type_scalar(return_type)) {
1683 mode = get_ir_mode(return_type);
1687 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1688 result = new_d_Proj(dbgi, resproj, mode, 0);
1691 if (function->kind == EXPR_REFERENCE &&
1692 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1693 /* A dead end: Keep the Call and the Block. Also place all further
1694 * nodes into a new and unreachable block. */
1696 keep_alive(get_cur_block());
1703 static void statement_to_firm(statement_t *statement);
1704 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1706 static ir_node *expression_to_addr(const expression_t *expression);
1707 static ir_node *create_condition_evaluation(const expression_t *expression,
1708 ir_node *true_block,
1709 ir_node *false_block);
1711 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1714 value = do_strict_conv(dbgi, value);
1716 ir_node *memory = get_store();
1718 if (is_type_scalar(type)) {
1719 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1720 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1721 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1722 set_Store_volatility(store, volatility_is_volatile);
1723 set_store(store_mem);
1725 ir_type *irtype = get_ir_type(type);
1726 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1727 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1728 set_store(copyb_mem);
1732 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1734 tarval *all_one = get_mode_all_one(mode);
1735 int mode_size = get_mode_size_bits(mode);
1737 assert(offset >= 0);
1739 assert(offset + size <= mode_size);
1740 if (size == mode_size) {
1744 long shiftr = get_mode_size_bits(mode) - size;
1745 long shiftl = offset;
1746 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1747 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1748 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1749 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1754 static void bitfield_store_to_firm(dbg_info *dbgi,
1755 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1757 ir_type *entity_type = get_entity_type(entity);
1758 ir_type *base_type = get_primitive_base_type(entity_type);
1759 assert(base_type != NULL);
1760 ir_mode *mode = get_type_mode(base_type);
1762 value = create_conv(dbgi, value, mode);
1764 /* kill upper bits of value and shift to right position */
1765 int bitoffset = get_entity_offset_bits_remainder(entity);
1766 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1768 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1769 ir_node *mask_node = new_d_Const(dbgi, mode, mask);
1770 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1771 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1772 ir_node *shiftcount = new_d_Const(dbgi, mode_uint, shiftl);
1773 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1775 /* load current value */
1776 ir_node *mem = get_store();
1777 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1778 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1779 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1780 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1781 tarval *inv_mask = tarval_not(shift_mask);
1782 ir_node *inv_mask_node = new_d_Const(dbgi, mode, inv_mask);
1783 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1785 /* construct new value and store */
1786 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1787 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1788 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1789 set_store(store_mem);
1792 set_Load_volatility(load, volatility_is_volatile);
1793 set_Store_volatility(store, volatility_is_volatile);
1797 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1800 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1801 type_t *type = expression->base.type;
1802 ir_mode *mode = get_ir_mode(type);
1803 ir_node *mem = get_store();
1804 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1805 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1806 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1808 load_res = create_conv(dbgi, load_res, mode_int);
1810 set_store(load_mem);
1812 /* kill upper bits */
1813 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1814 ir_entity *entity = expression->compound_entry->compound_member.entity;
1815 int bitoffset = get_entity_offset_bits_remainder(entity);
1816 ir_type *entity_type = get_entity_type(entity);
1817 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1818 long shift_bitsl = machine_size - bitoffset - bitsize;
1819 assert(shift_bitsl >= 0);
1820 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1821 ir_node *countl = new_d_Const(dbgi, mode_uint, tvl);
1822 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1824 long shift_bitsr = bitoffset + shift_bitsl;
1825 assert(shift_bitsr <= (long) machine_size);
1826 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1827 ir_node *countr = new_d_Const(dbgi, mode_uint, tvr);
1829 if (mode_is_signed(mode)) {
1830 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1832 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1835 return create_conv(dbgi, shiftr, mode);
1838 /* make sure the selected compound type is constructed */
1839 static void construct_select_compound(const select_expression_t *expression)
1841 type_t *type = skip_typeref(expression->compound->base.type);
1842 if (is_type_pointer(type)) {
1843 type = type->pointer.points_to;
1845 (void) get_ir_type(type);
1848 static void set_value_for_expression_addr(const expression_t *expression,
1849 ir_node *value, ir_node *addr)
1851 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1852 value = do_strict_conv(dbgi, value);
1854 if (expression->kind == EXPR_REFERENCE) {
1855 const reference_expression_t *ref = &expression->reference;
1857 entity_t *entity = ref->entity;
1858 assert(is_declaration(entity));
1859 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1860 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1861 set_value(entity->variable.v.value_number, value);
1867 addr = expression_to_addr(expression);
1869 type_t *type = skip_typeref(expression->base.type);
1871 if (expression->kind == EXPR_SELECT) {
1872 const select_expression_t *select = &expression->select;
1874 construct_select_compound(select);
1876 entity_t *entity = select->compound_entry;
1877 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1878 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1879 ir_entity *irentity = entity->compound_member.entity;
1881 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1882 bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1887 assign_value(dbgi, addr, type, value);
1890 static void set_value_for_expression(const expression_t *expression,
1893 set_value_for_expression_addr(expression, value, NULL);
1896 static ir_node *get_value_from_lvalue(const expression_t *expression,
1899 if (expression->kind == EXPR_REFERENCE) {
1900 const reference_expression_t *ref = &expression->reference;
1902 entity_t *entity = ref->entity;
1903 assert(entity->kind == ENTITY_VARIABLE);
1904 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1905 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1906 assert(addr == NULL);
1907 ir_mode *mode = get_ir_mode(expression->base.type);
1908 return get_value(entity->variable.v.value_number, mode);
1912 assert(addr != NULL);
1913 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1916 if (expression->kind == EXPR_SELECT &&
1917 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1918 construct_select_compound(&expression->select);
1919 value = bitfield_extract_to_firm(&expression->select, addr);
1921 value = deref_address(dbgi, expression->base.type, addr);
1928 static ir_node *create_incdec(const unary_expression_t *expression)
1930 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1931 const expression_t *value_expr = expression->value;
1932 ir_node *addr = expression_to_addr(value_expr);
1933 ir_node *value = get_value_from_lvalue(value_expr, addr);
1935 type_t *type = skip_typeref(expression->base.type);
1936 ir_mode *mode = get_ir_mode(expression->base.type);
1939 if (is_type_pointer(type)) {
1940 pointer_type_t *pointer_type = &type->pointer;
1941 offset = get_type_size(pointer_type->points_to);
1943 assert(is_type_arithmetic(type));
1944 offset = new_Const(mode, get_mode_one(mode));
1948 ir_node *store_value;
1949 switch(expression->base.kind) {
1950 case EXPR_UNARY_POSTFIX_INCREMENT:
1952 store_value = new_d_Add(dbgi, value, offset, mode);
1954 case EXPR_UNARY_POSTFIX_DECREMENT:
1956 store_value = new_d_Sub(dbgi, value, offset, mode);
1958 case EXPR_UNARY_PREFIX_INCREMENT:
1959 result = new_d_Add(dbgi, value, offset, mode);
1960 store_value = result;
1962 case EXPR_UNARY_PREFIX_DECREMENT:
1963 result = new_d_Sub(dbgi, value, offset, mode);
1964 store_value = result;
1967 panic("no incdec expr in create_incdec");
1970 set_value_for_expression_addr(value_expr, store_value, addr);
1975 static bool is_local_variable(expression_t *expression)
1977 if (expression->kind != EXPR_REFERENCE)
1979 reference_expression_t *ref_expr = &expression->reference;
1980 entity_t *entity = ref_expr->entity;
1981 if (entity->kind != ENTITY_VARIABLE)
1983 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1984 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
1987 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1990 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
1991 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1992 case EXPR_BINARY_NOTEQUAL:
1993 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1994 case EXPR_BINARY_ISLESS:
1995 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
1996 case EXPR_BINARY_ISLESSEQUAL:
1997 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
1998 case EXPR_BINARY_ISGREATER:
1999 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2000 case EXPR_BINARY_ISGREATEREQUAL:
2001 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2002 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2007 panic("trying to get pn_Cmp from non-comparison binexpr type");
2011 * Handle the assume optimizer hint: check if a Confirm
2012 * node can be created.
2014 * @param dbi debug info
2015 * @param expr the IL assume expression
2017 * we support here only some simple cases:
2022 static ir_node *handle_assume_compare(dbg_info *dbi,
2023 const binary_expression_t *expression)
2025 expression_t *op1 = expression->left;
2026 expression_t *op2 = expression->right;
2027 entity_t *var2, *var = NULL;
2028 ir_node *res = NULL;
2031 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2033 if (is_local_variable(op1) && is_local_variable(op2)) {
2034 var = op1->reference.entity;
2035 var2 = op2->reference.entity;
2037 type_t *const type = skip_typeref(var->declaration.type);
2038 ir_mode *const mode = get_ir_mode(type);
2040 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2041 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2043 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2044 set_value(var2->variable.v.value_number, res);
2046 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2047 set_value(var->variable.v.value_number, res);
2053 if (is_local_variable(op1) && is_constant_expression(op2)) {
2054 var = op1->reference.entity;
2056 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2057 cmp_val = get_inversed_pnc(cmp_val);
2058 var = op2->reference.entity;
2063 type_t *const type = skip_typeref(var->declaration.type);
2064 ir_mode *const mode = get_ir_mode(type);
2066 res = get_value(var->variable.v.value_number, mode);
2067 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2068 set_value(var->variable.v.value_number, res);
2074 * Handle the assume optimizer hint.
2076 * @param dbi debug info
2077 * @param expr the IL assume expression
2079 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2080 switch(expression->kind) {
2081 case EXPR_BINARY_EQUAL:
2082 case EXPR_BINARY_NOTEQUAL:
2083 case EXPR_BINARY_LESS:
2084 case EXPR_BINARY_LESSEQUAL:
2085 case EXPR_BINARY_GREATER:
2086 case EXPR_BINARY_GREATEREQUAL:
2087 return handle_assume_compare(dbi, &expression->binary);
2093 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2095 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2096 type_t *type = skip_typeref(expression->base.type);
2098 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2099 return expression_to_addr(expression->value);
2101 const expression_t *value = expression->value;
2103 switch(expression->base.kind) {
2104 case EXPR_UNARY_NEGATE: {
2105 ir_node *value_node = expression_to_firm(value);
2106 ir_mode *mode = get_ir_mode(type);
2107 return new_d_Minus(dbgi, value_node, mode);
2109 case EXPR_UNARY_PLUS:
2110 return expression_to_firm(value);
2111 case EXPR_UNARY_BITWISE_NEGATE: {
2112 ir_node *value_node = expression_to_firm(value);
2113 ir_mode *mode = get_ir_mode(type);
2114 return new_d_Not(dbgi, value_node, mode);
2116 case EXPR_UNARY_NOT: {
2117 ir_node *value_node = _expression_to_firm(value);
2118 value_node = create_conv(dbgi, value_node, mode_b);
2119 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2122 case EXPR_UNARY_DEREFERENCE: {
2123 ir_node *value_node = expression_to_firm(value);
2124 type_t *value_type = skip_typeref(value->base.type);
2125 assert(is_type_pointer(value_type));
2126 type_t *points_to = value_type->pointer.points_to;
2127 return deref_address(dbgi, points_to, value_node);
2129 case EXPR_UNARY_POSTFIX_INCREMENT:
2130 case EXPR_UNARY_POSTFIX_DECREMENT:
2131 case EXPR_UNARY_PREFIX_INCREMENT:
2132 case EXPR_UNARY_PREFIX_DECREMENT:
2133 return create_incdec(expression);
2134 case EXPR_UNARY_CAST: {
2135 ir_node *value_node = expression_to_firm(value);
2136 if (is_type_scalar(type)) {
2137 ir_mode *mode = get_ir_mode(type);
2138 ir_node *node = create_conv(dbgi, value_node, mode);
2139 node = do_strict_conv(dbgi, node);
2142 /* make sure firm type is constructed */
2143 (void) get_ir_type(type);
2147 case EXPR_UNARY_CAST_IMPLICIT: {
2148 ir_node *value_node = expression_to_firm(value);
2149 if (is_type_scalar(type)) {
2150 ir_mode *mode = get_ir_mode(type);
2151 return create_conv(dbgi, value_node, mode);
2156 case EXPR_UNARY_ASSUME:
2157 if (firm_opt.confirm)
2158 return handle_assume(dbgi, value);
2165 panic("invalid UNEXPR type found");
2169 * produces a 0/1 depending of the value of a mode_b node
2171 static ir_node *produce_condition_result(const expression_t *expression,
2174 ir_mode *mode = get_ir_mode(expression->base.type);
2175 ir_node *cur_block = get_cur_block();
2177 ir_node *one_block = new_immBlock();
2178 ir_node *one = new_Const(mode, get_mode_one(mode));
2179 ir_node *jmp_one = new_d_Jmp(dbgi);
2181 ir_node *zero_block = new_immBlock();
2182 ir_node *zero = new_Const(mode, get_mode_null(mode));
2183 ir_node *jmp_zero = new_d_Jmp(dbgi);
2185 set_cur_block(cur_block);
2186 create_condition_evaluation(expression, one_block, zero_block);
2187 mature_immBlock(one_block);
2188 mature_immBlock(zero_block);
2190 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2191 new_Block(2, in_cf);
2193 ir_node *in[2] = { one, zero };
2194 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2199 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2200 ir_node *value, type_t *type)
2202 pointer_type_t *const pointer_type = &type->pointer;
2203 type_t *const points_to = skip_typeref(pointer_type->points_to);
2204 unsigned elem_size = get_type_size_const(points_to);
2206 /* gcc extension: allow arithmetic with void * and function * */
2207 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2208 is_type_function(points_to)) {
2212 assert(elem_size >= 1);
2216 value = create_conv(dbgi, value, mode_int);
2217 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2218 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode_int);
2222 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2223 ir_node *left, ir_node *right)
2226 type_t *type_left = skip_typeref(expression->left->base.type);
2227 type_t *type_right = skip_typeref(expression->right->base.type);
2229 expression_kind_t kind = expression->base.kind;
2232 case EXPR_BINARY_SHIFTLEFT:
2233 case EXPR_BINARY_SHIFTRIGHT:
2234 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2235 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2236 mode = get_irn_mode(left);
2237 right = create_conv(dbgi, right, mode_uint);
2240 case EXPR_BINARY_SUB:
2241 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2242 const pointer_type_t *const ptr_type = &type_left->pointer;
2244 mode = get_ir_mode(expression->base.type);
2245 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2246 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2247 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2248 ir_node *const no_mem = new_NoMem();
2249 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2250 mode, op_pin_state_floats);
2251 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2254 case EXPR_BINARY_SUB_ASSIGN:
2255 if (is_type_pointer(type_left)) {
2256 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2257 mode = get_ir_mode(type_left);
2262 case EXPR_BINARY_ADD:
2263 case EXPR_BINARY_ADD_ASSIGN:
2264 if (is_type_pointer(type_left)) {
2265 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2266 mode = get_ir_mode(type_left);
2268 } else if (is_type_pointer(type_right)) {
2269 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2270 mode = get_ir_mode(type_right);
2277 mode = get_irn_mode(right);
2278 left = create_conv(dbgi, left, mode);
2283 case EXPR_BINARY_ADD_ASSIGN:
2284 case EXPR_BINARY_ADD:
2285 return new_d_Add(dbgi, left, right, mode);
2286 case EXPR_BINARY_SUB_ASSIGN:
2287 case EXPR_BINARY_SUB:
2288 return new_d_Sub(dbgi, left, right, mode);
2289 case EXPR_BINARY_MUL_ASSIGN:
2290 case EXPR_BINARY_MUL:
2291 return new_d_Mul(dbgi, left, right, mode);
2292 case EXPR_BINARY_BITWISE_AND:
2293 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2294 return new_d_And(dbgi, left, right, mode);
2295 case EXPR_BINARY_BITWISE_OR:
2296 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2297 return new_d_Or(dbgi, left, right, mode);
2298 case EXPR_BINARY_BITWISE_XOR:
2299 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2300 return new_d_Eor(dbgi, left, right, mode);
2301 case EXPR_BINARY_SHIFTLEFT:
2302 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2303 return new_d_Shl(dbgi, left, right, mode);
2304 case EXPR_BINARY_SHIFTRIGHT:
2305 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2306 if (mode_is_signed(mode)) {
2307 return new_d_Shrs(dbgi, left, right, mode);
2309 return new_d_Shr(dbgi, left, right, mode);
2311 case EXPR_BINARY_DIV:
2312 case EXPR_BINARY_DIV_ASSIGN: {
2313 ir_node *pin = new_Pin(new_NoMem());
2316 if (mode_is_float(mode)) {
2317 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2318 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2320 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2321 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2325 case EXPR_BINARY_MOD:
2326 case EXPR_BINARY_MOD_ASSIGN: {
2327 ir_node *pin = new_Pin(new_NoMem());
2328 assert(!mode_is_float(mode));
2329 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2330 op_pin_state_floats);
2331 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2335 panic("unexpected expression kind");
2339 static ir_node *create_lazy_op(const binary_expression_t *expression)
2341 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2342 type_t *type = expression->base.type;
2343 ir_mode *mode = get_ir_mode(type);
2345 if (is_constant_expression(expression->left)) {
2346 long val = fold_constant(expression->left);
2347 expression_kind_t ekind = expression->base.kind;
2348 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2349 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2350 (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2351 return expression_to_firm(expression->right);
2353 return new_Const(mode, get_mode_one(mode));
2357 return produce_condition_result((const expression_t*) expression, dbgi);
2360 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2361 ir_node *right, ir_mode *mode);
2363 static ir_node *create_assign_binop(const binary_expression_t *expression)
2365 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2366 const expression_t *left_expr = expression->left;
2367 ir_mode *left_mode = get_ir_mode(left_expr->base.type);
2368 ir_node *right = expression_to_firm(expression->right);
2369 ir_node *left_addr = expression_to_addr(left_expr);
2370 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2371 ir_node *result = create_op(dbgi, expression, left, right);
2373 result = create_conv(dbgi, result, left_mode);
2374 result = do_strict_conv(dbgi, result);
2376 set_value_for_expression_addr(left_expr, result, left_addr);
2381 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2383 expression_kind_t kind = expression->base.kind;
2386 case EXPR_BINARY_EQUAL:
2387 case EXPR_BINARY_NOTEQUAL:
2388 case EXPR_BINARY_LESS:
2389 case EXPR_BINARY_LESSEQUAL:
2390 case EXPR_BINARY_GREATER:
2391 case EXPR_BINARY_GREATEREQUAL:
2392 case EXPR_BINARY_ISGREATER:
2393 case EXPR_BINARY_ISGREATEREQUAL:
2394 case EXPR_BINARY_ISLESS:
2395 case EXPR_BINARY_ISLESSEQUAL:
2396 case EXPR_BINARY_ISLESSGREATER:
2397 case EXPR_BINARY_ISUNORDERED: {
2398 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2399 ir_node *left = expression_to_firm(expression->left);
2400 ir_node *right = expression_to_firm(expression->right);
2401 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2402 long pnc = get_pnc(kind, expression->left->base.type);
2403 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2406 case EXPR_BINARY_ASSIGN: {
2407 ir_node *addr = expression_to_addr(expression->left);
2408 ir_node *right = expression_to_firm(expression->right);
2409 set_value_for_expression_addr(expression->left, right, addr);
2413 case EXPR_BINARY_ADD:
2414 case EXPR_BINARY_SUB:
2415 case EXPR_BINARY_MUL:
2416 case EXPR_BINARY_DIV:
2417 case EXPR_BINARY_MOD:
2418 case EXPR_BINARY_BITWISE_AND:
2419 case EXPR_BINARY_BITWISE_OR:
2420 case EXPR_BINARY_BITWISE_XOR:
2421 case EXPR_BINARY_SHIFTLEFT:
2422 case EXPR_BINARY_SHIFTRIGHT:
2424 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2425 ir_node *left = expression_to_firm(expression->left);
2426 ir_node *right = expression_to_firm(expression->right);
2427 return create_op(dbgi, expression, left, right);
2429 case EXPR_BINARY_LOGICAL_AND:
2430 case EXPR_BINARY_LOGICAL_OR:
2431 return create_lazy_op(expression);
2432 case EXPR_BINARY_COMMA:
2433 /* create side effects of left side */
2434 (void) expression_to_firm(expression->left);
2435 return _expression_to_firm(expression->right);
2437 case EXPR_BINARY_ADD_ASSIGN:
2438 case EXPR_BINARY_SUB_ASSIGN:
2439 case EXPR_BINARY_MUL_ASSIGN:
2440 case EXPR_BINARY_MOD_ASSIGN:
2441 case EXPR_BINARY_DIV_ASSIGN:
2442 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2443 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2444 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2445 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2446 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2447 return create_assign_binop(expression);
2448 case EXPR_BINARY_BUILTIN_EXPECT:
2449 return _expression_to_firm(expression->left);
2451 panic("TODO binexpr type");
2455 static ir_node *array_access_addr(const array_access_expression_t *expression)
2457 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2458 ir_node *base_addr = expression_to_firm(expression->array_ref);
2459 ir_node *offset = expression_to_firm(expression->index);
2461 type_t *offset_type = skip_typeref(expression->index->base.type);
2463 if (is_type_signed(offset_type)) {
2464 mode = get_ir_mode(type_ssize_t);
2466 mode = get_ir_mode(type_size_t);
2468 offset = create_conv(dbgi, offset, mode);
2470 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2471 assert(is_type_pointer(ref_type));
2472 pointer_type_t *pointer_type = &ref_type->pointer;
2474 ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2475 elem_size_const = create_conv(dbgi, elem_size_const, mode);
2476 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
2478 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2483 static ir_node *array_access_to_firm(
2484 const array_access_expression_t *expression)
2486 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2487 ir_node *addr = array_access_addr(expression);
2488 type_t *type = revert_automatic_type_conversion(
2489 (const expression_t*) expression);
2490 type = skip_typeref(type);
2492 return deref_address(dbgi, type, addr);
2495 static long get_offsetof_offset(const offsetof_expression_t *expression)
2497 type_t *orig_type = expression->type;
2500 designator_t *designator = expression->designator;
2501 for ( ; designator != NULL; designator = designator->next) {
2502 type_t *type = skip_typeref(orig_type);
2503 /* be sure the type is constructed */
2504 (void) get_ir_type(type);
2506 if (designator->symbol != NULL) {
2507 assert(is_type_compound(type));
2508 symbol_t *symbol = designator->symbol;
2510 compound_t *compound = type->compound.compound;
2511 entity_t *iter = compound->members.entities;
2512 for ( ; iter != NULL; iter = iter->base.next) {
2513 if (iter->base.symbol == symbol) {
2517 assert(iter != NULL);
2519 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2520 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2521 offset += get_entity_offset(iter->compound_member.entity);
2523 orig_type = iter->declaration.type;
2525 expression_t *array_index = designator->array_index;
2526 assert(designator->array_index != NULL);
2527 assert(is_type_array(type));
2529 long index = fold_constant(array_index);
2530 ir_type *arr_type = get_ir_type(type);
2531 ir_type *elem_type = get_array_element_type(arr_type);
2532 long elem_size = get_type_size_bytes(elem_type);
2534 offset += index * elem_size;
2536 orig_type = type->array.element_type;
2543 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2545 ir_mode *mode = get_ir_mode(expression->base.type);
2546 long offset = get_offsetof_offset(expression);
2547 tarval *tv = new_tarval_from_long(offset, mode);
2548 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2550 return new_d_Const(dbgi, mode, tv);
2553 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2554 ir_entity *entity, type_t *type);
2556 static ir_node *compound_literal_to_firm(
2557 const compound_literal_expression_t *expression)
2559 type_t *type = expression->type;
2561 /* create an entity on the stack */
2562 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2564 ident *const id = id_unique("CompLit.%u");
2565 ir_type *const irtype = get_ir_type(type);
2566 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2567 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2568 set_entity_ld_ident(entity, id);
2570 set_entity_variability(entity, variability_uninitialized);
2572 /* create initialisation code */
2573 initializer_t *initializer = expression->initializer;
2574 create_local_initializer(initializer, dbgi, entity, type);
2576 /* create a sel for the compound literal address */
2577 ir_node *frame = get_local_frame(entity);
2578 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2583 * Transform a sizeof expression into Firm code.
2585 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2587 type_t *type = expression->type;
2589 type = expression->tp_expression->base.type;
2590 assert(type != NULL);
2593 type = skip_typeref(type);
2594 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2595 if (is_type_array(type) && type->array.is_vla
2596 && expression->tp_expression != NULL) {
2597 expression_to_firm(expression->tp_expression);
2600 return get_type_size(type);
2604 * Transform an alignof expression into Firm code.
2606 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2608 type_t *type = expression->type;
2610 /* beware: if expression is a variable reference, return the
2611 alignment of the variable. */
2612 const expression_t *tp_expression = expression->tp_expression;
2613 const entity_t *entity = expression_is_variable(tp_expression);
2614 if (entity != NULL) {
2615 /* TODO: get the alignment of this variable. */
2618 type = tp_expression->base.type;
2619 assert(type != NULL);
2622 ir_mode *const mode = get_ir_mode(expression->base.type);
2623 symconst_symbol sym;
2624 sym.type_p = get_ir_type(type);
2625 return new_SymConst(mode, sym, symconst_type_align);
2628 static void init_ir_types(void);
2630 long fold_constant(const expression_t *expression)
2632 assert(is_type_valid(skip_typeref(expression->base.type)));
2634 bool constant_folding_old = constant_folding;
2635 constant_folding = true;
2639 assert(is_constant_expression(expression));
2641 ir_graph *old_current_ir_graph = current_ir_graph;
2642 if (current_ir_graph == NULL) {
2643 current_ir_graph = get_const_code_irg();
2646 ir_node *cnst = expression_to_firm(expression);
2647 current_ir_graph = old_current_ir_graph;
2649 if (!is_Const(cnst)) {
2650 panic("couldn't fold constant\n");
2653 tarval *tv = get_Const_tarval(cnst);
2654 if (!tarval_is_long(tv)) {
2655 panic("result of constant folding is not integer\n");
2658 constant_folding = constant_folding_old;
2660 return get_tarval_long(tv);
2663 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2665 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2667 /* first try to fold a constant condition */
2668 if (is_constant_expression(expression->condition)) {
2669 long val = fold_constant(expression->condition);
2671 expression_t *true_expression = expression->true_expression;
2672 if (true_expression == NULL)
2673 true_expression = expression->condition;
2674 return expression_to_firm(true_expression);
2676 return expression_to_firm(expression->false_expression);
2680 ir_node *cur_block = get_cur_block();
2682 /* create the true block */
2683 ir_node *true_block = new_immBlock();
2685 ir_node *true_val = expression->true_expression != NULL ?
2686 expression_to_firm(expression->true_expression) : NULL;
2687 ir_node *true_jmp = new_Jmp();
2689 /* create the false block */
2690 ir_node *false_block = new_immBlock();
2692 ir_node *false_val = expression_to_firm(expression->false_expression);
2693 ir_node *false_jmp = new_Jmp();
2695 /* create the condition evaluation */
2696 set_cur_block(cur_block);
2697 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2698 if (expression->true_expression == NULL) {
2699 if (cond_expr != NULL) {
2700 true_val = cond_expr;
2702 /* Condition ended with a short circuit (&&, ||, !) operation.
2703 * Generate a "1" as value for the true branch. */
2704 ir_mode *const mode = mode_Is;
2705 true_val = new_Const(mode, get_mode_one(mode));
2708 mature_immBlock(true_block);
2709 mature_immBlock(false_block);
2711 /* create the common block */
2712 ir_node *in_cf[2] = { true_jmp, false_jmp };
2713 new_Block(2, in_cf);
2715 /* TODO improve static semantics, so either both or no values are NULL */
2716 if (true_val == NULL || false_val == NULL)
2719 ir_node *in[2] = { true_val, false_val };
2720 ir_mode *mode = get_irn_mode(true_val);
2721 assert(get_irn_mode(false_val) == mode);
2722 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2728 * Returns an IR-node representing the address of a field.
2730 static ir_node *select_addr(const select_expression_t *expression)
2732 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2734 construct_select_compound(expression);
2736 ir_node *compound_addr = expression_to_firm(expression->compound);
2738 entity_t *entry = expression->compound_entry;
2739 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2740 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2741 ir_entity *irentity = entry->compound_member.entity;
2743 assert(irentity != NULL);
2745 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2750 static ir_node *select_to_firm(const select_expression_t *expression)
2752 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2753 ir_node *addr = select_addr(expression);
2754 type_t *type = revert_automatic_type_conversion(
2755 (const expression_t*) expression);
2756 type = skip_typeref(type);
2758 entity_t *entry = expression->compound_entry;
2759 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2760 type_t *entry_type = skip_typeref(entry->declaration.type);
2762 if (entry_type->kind == TYPE_BITFIELD) {
2763 return bitfield_extract_to_firm(expression, addr);
2766 return deref_address(dbgi, type, addr);
2769 /* Values returned by __builtin_classify_type. */
2770 typedef enum gcc_type_class
2776 enumeral_type_class,
2779 reference_type_class,
2783 function_type_class,
2794 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2796 const type_t *const type = skip_typeref(expr->type_expression->base.type);
2802 const atomic_type_t *const atomic_type = &type->atomic;
2803 switch (atomic_type->akind) {
2804 /* should not be reached */
2805 case ATOMIC_TYPE_INVALID:
2809 /* gcc cannot do that */
2810 case ATOMIC_TYPE_VOID:
2811 tc = void_type_class;
2814 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2815 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2816 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2817 case ATOMIC_TYPE_SHORT:
2818 case ATOMIC_TYPE_USHORT:
2819 case ATOMIC_TYPE_INT:
2820 case ATOMIC_TYPE_UINT:
2821 case ATOMIC_TYPE_LONG:
2822 case ATOMIC_TYPE_ULONG:
2823 case ATOMIC_TYPE_LONGLONG:
2824 case ATOMIC_TYPE_ULONGLONG:
2825 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2826 tc = integer_type_class;
2829 case ATOMIC_TYPE_FLOAT:
2830 case ATOMIC_TYPE_DOUBLE:
2831 case ATOMIC_TYPE_LONG_DOUBLE:
2832 tc = real_type_class;
2835 panic("Unexpected atomic type in classify_type_to_firm().");
2838 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2839 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2840 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2841 case TYPE_ARRAY: /* gcc handles this as pointer */
2842 case TYPE_FUNCTION: /* gcc handles this as pointer */
2843 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2844 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2845 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2847 /* gcc handles this as integer */
2848 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2851 /* typedef/typeof should be skipped already */
2858 panic("unexpected TYPE classify_type_to_firm().");
2861 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2862 ir_mode *const mode = mode_int;
2863 tarval *const tv = new_tarval_from_long(tc, mode);
2864 return new_d_Const(dbgi, mode, tv);
2867 static ir_node *function_name_to_firm(
2868 const funcname_expression_t *const expr)
2870 switch(expr->kind) {
2871 case FUNCNAME_FUNCTION:
2872 case FUNCNAME_PRETTY_FUNCTION:
2873 case FUNCNAME_FUNCDNAME:
2874 if (current_function_name == NULL) {
2875 const source_position_t *const src_pos = &expr->base.source_position;
2876 const char *name = current_function_entity->base.symbol->string;
2877 const string_t string = { name, strlen(name) + 1 };
2878 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2880 return current_function_name;
2881 case FUNCNAME_FUNCSIG:
2882 if (current_funcsig == NULL) {
2883 const source_position_t *const src_pos = &expr->base.source_position;
2884 ir_entity *ent = get_irg_entity(current_ir_graph);
2885 const char *const name = get_entity_ld_name(ent);
2886 const string_t string = { name, strlen(name) + 1 };
2887 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2889 return current_funcsig;
2891 panic("Unsupported function name");
2894 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2896 statement_t *statement = expr->statement;
2898 assert(statement->kind == STATEMENT_COMPOUND);
2899 return compound_statement_to_firm(&statement->compound);
2902 static ir_node *va_start_expression_to_firm(
2903 const va_start_expression_t *const expr)
2905 type_t *const type = current_function_entity->declaration.type;
2906 ir_type *const method_type = get_ir_type(type);
2907 int const n = get_method_n_params(method_type) - 1;
2908 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2909 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2910 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2911 ir_node *const no_mem = new_NoMem();
2912 ir_node *const arg_sel =
2913 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2915 ir_node *const cnst = get_type_size(expr->parameter->base.type);
2916 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2917 set_value_for_expression(expr->ap, add);
2922 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2924 type_t *const type = expr->base.type;
2925 expression_t *const ap_expr = expr->ap;
2926 ir_node *const ap_addr = expression_to_addr(ap_expr);
2927 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
2928 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2929 ir_node *const res = deref_address(dbgi, type, ap);
2931 ir_node *const cnst = get_type_size(expr->base.type);
2932 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2934 set_value_for_expression_addr(ap_expr, add, ap_addr);
2939 static ir_node *dereference_addr(const unary_expression_t *const expression)
2941 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2942 return expression_to_firm(expression->value);
2946 * Returns a IR-node representing an lvalue of the given expression.
2948 static ir_node *expression_to_addr(const expression_t *expression)
2950 switch(expression->kind) {
2951 case EXPR_REFERENCE:
2952 return reference_addr(&expression->reference);
2953 case EXPR_ARRAY_ACCESS:
2954 return array_access_addr(&expression->array_access);
2956 return select_addr(&expression->select);
2958 return call_expression_to_firm(&expression->call);
2959 case EXPR_UNARY_DEREFERENCE: {
2960 return dereference_addr(&expression->unary);
2965 panic("trying to get address of non-lvalue");
2968 static ir_node *builtin_constant_to_firm(
2969 const builtin_constant_expression_t *expression)
2971 ir_mode *mode = get_ir_mode(expression->base.type);
2974 if (is_constant_expression(expression->value)) {
2979 return new_Const_long(mode, v);
2982 static ir_node *builtin_prefetch_to_firm(
2983 const builtin_prefetch_expression_t *expression)
2985 ir_node *adr = expression_to_firm(expression->adr);
2986 /* no Firm support for prefetch yet */
2991 static ir_node *get_label_block(label_t *label)
2993 if (label->block != NULL)
2994 return label->block;
2996 /* beware: might be called from create initializer with current_ir_graph
2997 * set to const_code_irg. */
2998 ir_graph *rem = current_ir_graph;
2999 current_ir_graph = current_function;
3001 ir_node *old_cur_block = get_cur_block();
3002 ir_node *block = new_immBlock();
3003 set_cur_block(old_cur_block);
3005 label->block = block;
3007 ARR_APP1(label_t *, all_labels, label);
3009 current_ir_graph = rem;
3014 * Pointer to a label. This is used for the
3015 * GNU address-of-label extension.
3017 static ir_node *label_address_to_firm(
3018 const label_address_expression_t *label)
3020 ir_node *block = get_label_block(label->label);
3021 ir_label_t nr = get_Block_label(block);
3024 nr = get_irp_next_label_nr();
3025 set_Block_label(block, nr);
3027 symconst_symbol value;
3029 return new_SymConst(mode_P_code, value, symconst_label);
3033 * creates firm nodes for an expression. The difference between this function
3034 * and expression_to_firm is, that this version might produce mode_b nodes
3035 * instead of mode_Is.
3037 static ir_node *_expression_to_firm(const expression_t *expression)
3040 if (!constant_folding) {
3041 assert(!expression->base.transformed);
3042 ((expression_t*) expression)->base.transformed = true;
3046 switch (expression->kind) {
3047 case EXPR_CHARACTER_CONSTANT:
3048 return character_constant_to_firm(&expression->conste);
3049 case EXPR_WIDE_CHARACTER_CONSTANT:
3050 return wide_character_constant_to_firm(&expression->conste);
3052 return const_to_firm(&expression->conste);
3053 case EXPR_STRING_LITERAL:
3054 return string_literal_to_firm(&expression->string);
3055 case EXPR_WIDE_STRING_LITERAL:
3056 return wide_string_literal_to_firm(&expression->wide_string);
3057 case EXPR_REFERENCE:
3058 return reference_expression_to_firm(&expression->reference);
3059 case EXPR_REFERENCE_ENUM_VALUE:
3060 return reference_expression_enum_value_to_firm(&expression->reference);
3062 return call_expression_to_firm(&expression->call);
3064 return unary_expression_to_firm(&expression->unary);
3066 return binary_expression_to_firm(&expression->binary);
3067 case EXPR_ARRAY_ACCESS:
3068 return array_access_to_firm(&expression->array_access);
3070 return sizeof_to_firm(&expression->typeprop);
3072 return alignof_to_firm(&expression->typeprop);
3073 case EXPR_CONDITIONAL:
3074 return conditional_to_firm(&expression->conditional);
3076 return select_to_firm(&expression->select);
3077 case EXPR_CLASSIFY_TYPE:
3078 return classify_type_to_firm(&expression->classify_type);
3080 return function_name_to_firm(&expression->funcname);
3081 case EXPR_STATEMENT:
3082 return statement_expression_to_firm(&expression->statement);
3084 return va_start_expression_to_firm(&expression->va_starte);
3086 return va_arg_expression_to_firm(&expression->va_arge);
3087 case EXPR_BUILTIN_SYMBOL:
3088 panic("unimplemented expression found");
3089 case EXPR_BUILTIN_CONSTANT_P:
3090 return builtin_constant_to_firm(&expression->builtin_constant);
3091 case EXPR_BUILTIN_PREFETCH:
3092 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3094 return offsetof_to_firm(&expression->offsetofe);
3095 case EXPR_COMPOUND_LITERAL:
3096 return compound_literal_to_firm(&expression->compound_literal);
3097 case EXPR_LABEL_ADDRESS:
3098 return label_address_to_firm(&expression->label_address);
3104 panic("invalid expression found");
3107 static bool produces_mode_b(const expression_t *expression)
3109 switch (expression->kind) {
3110 case EXPR_BINARY_EQUAL:
3111 case EXPR_BINARY_NOTEQUAL:
3112 case EXPR_BINARY_LESS:
3113 case EXPR_BINARY_LESSEQUAL:
3114 case EXPR_BINARY_GREATER:
3115 case EXPR_BINARY_GREATEREQUAL:
3116 case EXPR_BINARY_ISGREATER:
3117 case EXPR_BINARY_ISGREATEREQUAL:
3118 case EXPR_BINARY_ISLESS:
3119 case EXPR_BINARY_ISLESSEQUAL:
3120 case EXPR_BINARY_ISLESSGREATER:
3121 case EXPR_BINARY_ISUNORDERED:
3122 case EXPR_UNARY_NOT:
3125 case EXPR_BINARY_BUILTIN_EXPECT:
3126 return produces_mode_b(expression->binary.left);
3127 case EXPR_BINARY_COMMA:
3128 return produces_mode_b(expression->binary.right);
3135 static ir_node *expression_to_firm(const expression_t *expression)
3137 if (!produces_mode_b(expression)) {
3138 ir_node *res = _expression_to_firm(expression);
3139 assert(res == NULL || get_irn_mode(res) != mode_b);
3143 if (is_constant_expression(expression)) {
3144 ir_node *res = _expression_to_firm(expression);
3145 ir_mode *mode = get_ir_mode(expression->base.type);
3146 assert(is_Const(res));
3147 if (is_Const_null(res)) {
3148 return new_Const_long(mode, 0);
3150 return new_Const_long(mode, 1);
3154 /* we have to produce a 0/1 from the mode_b expression */
3155 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3156 return produce_condition_result(expression, dbgi);
3160 * create a short-circuit expression evaluation that tries to construct
3161 * efficient control flow structures for &&, || and ! expressions
3163 static ir_node *create_condition_evaluation(const expression_t *expression,
3164 ir_node *true_block,
3165 ir_node *false_block)
3167 switch(expression->kind) {
3168 case EXPR_UNARY_NOT: {
3169 const unary_expression_t *unary_expression = &expression->unary;
3170 create_condition_evaluation(unary_expression->value, false_block,
3174 case EXPR_BINARY_LOGICAL_AND: {
3175 const binary_expression_t *binary_expression = &expression->binary;
3177 ir_node *cur_block = get_cur_block();
3178 ir_node *extra_block = new_immBlock();
3179 set_cur_block(cur_block);
3180 create_condition_evaluation(binary_expression->left, extra_block,
3182 mature_immBlock(extra_block);
3183 set_cur_block(extra_block);
3184 create_condition_evaluation(binary_expression->right, true_block,
3188 case EXPR_BINARY_LOGICAL_OR: {
3189 const binary_expression_t *binary_expression = &expression->binary;
3191 ir_node *cur_block = get_cur_block();
3192 ir_node *extra_block = new_immBlock();
3193 set_cur_block(cur_block);
3194 create_condition_evaluation(binary_expression->left, true_block,
3196 mature_immBlock(extra_block);
3197 set_cur_block(extra_block);
3198 create_condition_evaluation(binary_expression->right, true_block,
3206 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3207 ir_node *cond_expr = _expression_to_firm(expression);
3208 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3209 ir_node *cond = new_d_Cond(dbgi, condition);
3210 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3211 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3213 /* set branch prediction info based on __builtin_expect */
3214 if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3215 long cnst = fold_constant(expression->binary.right);
3216 cond_jmp_predicate pred;
3219 pred = COND_JMP_PRED_FALSE;
3221 pred = COND_JMP_PRED_TRUE;
3223 set_Cond_jmp_pred(cond, pred);
3226 add_immBlock_pred(true_block, true_proj);
3227 if (false_block != NULL) {
3228 add_immBlock_pred(false_block, false_proj);
3231 set_cur_block(NULL);
3236 static void create_variable_entity(entity_t *variable,
3237 declaration_kind_t declaration_kind,
3238 ir_type *parent_type)
3240 assert(variable->kind == ENTITY_VARIABLE);
3241 type_t *const type = skip_typeref(variable->declaration.type);
3242 ident *const id = new_id_from_str(variable->base.symbol->string);
3243 ir_type *const irtype = get_ir_type(type);
3244 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3245 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3247 handle_gnu_attributes_ent(irentity, variable);
3249 variable->declaration.kind = (unsigned char) declaration_kind;
3250 variable->variable.v.entity = irentity;
3251 set_entity_variability(irentity, variability_uninitialized);
3252 set_entity_ld_ident(irentity, create_ld_ident(variable));
3253 if (parent_type == get_tls_type())
3254 set_entity_allocation(irentity, allocation_automatic);
3255 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3256 set_entity_allocation(irentity, allocation_static);
3258 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3259 set_entity_volatility(irentity, volatility_is_volatile);
3264 typedef struct type_path_entry_t type_path_entry_t;
3265 struct type_path_entry_t {
3267 ir_initializer_t *initializer;
3269 entity_t *compound_entry;
3272 typedef struct type_path_t type_path_t;
3273 struct type_path_t {
3274 type_path_entry_t *path;
3279 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3281 size_t len = ARR_LEN(path->path);
3283 for (size_t i = 0; i < len; ++i) {
3284 const type_path_entry_t *entry = & path->path[i];
3286 type_t *type = skip_typeref(entry->type);
3287 if (is_type_compound(type)) {
3288 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3289 } else if (is_type_array(type)) {
3290 fprintf(stderr, "[%u]", (unsigned) entry->index);
3292 fprintf(stderr, "-INVALID-");
3295 fprintf(stderr, " (");
3296 print_type(path->top_type);
3297 fprintf(stderr, ")");
3300 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3302 size_t len = ARR_LEN(path->path);
3304 return & path->path[len-1];
3307 static type_path_entry_t *append_to_type_path(type_path_t *path)
3309 size_t len = ARR_LEN(path->path);
3310 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3312 type_path_entry_t *result = & path->path[len];
3313 memset(result, 0, sizeof(result[0]));
3317 static size_t get_compound_member_count(const compound_type_t *type)
3319 compound_t *compound = type->compound;
3320 size_t n_members = 0;
3321 entity_t *member = compound->members.entities;
3322 for ( ; member != NULL; member = member->base.next) {
3329 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3331 type_t *orig_top_type = path->top_type;
3332 type_t *top_type = skip_typeref(orig_top_type);
3334 assert(is_type_compound(top_type) || is_type_array(top_type));
3336 if (ARR_LEN(path->path) == 0) {
3339 type_path_entry_t *top = get_type_path_top(path);
3340 ir_initializer_t *initializer = top->initializer;
3341 return get_initializer_compound_value(initializer, top->index);
3345 static void descend_into_subtype(type_path_t *path)
3347 type_t *orig_top_type = path->top_type;
3348 type_t *top_type = skip_typeref(orig_top_type);
3350 assert(is_type_compound(top_type) || is_type_array(top_type));
3352 ir_initializer_t *initializer = get_initializer_entry(path);
3354 type_path_entry_t *top = append_to_type_path(path);
3355 top->type = top_type;
3359 if (is_type_compound(top_type)) {
3360 compound_t *compound = top_type->compound.compound;
3361 entity_t *entry = compound->members.entities;
3363 top->compound_entry = entry;
3365 len = get_compound_member_count(&top_type->compound);
3366 if (entry != NULL) {
3367 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3368 path->top_type = entry->declaration.type;
3371 assert(is_type_array(top_type));
3372 assert(top_type->array.size > 0);
3375 path->top_type = top_type->array.element_type;
3376 len = top_type->array.size;
3378 if (initializer == NULL
3379 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3380 initializer = create_initializer_compound(len);
3381 /* we have to set the entry at the 2nd latest path entry... */
3382 size_t path_len = ARR_LEN(path->path);
3383 assert(path_len >= 1);
3385 type_path_entry_t *entry = & path->path[path_len-2];
3386 ir_initializer_t *tinitializer = entry->initializer;
3387 set_initializer_compound_value(tinitializer, entry->index,
3391 top->initializer = initializer;
3394 static void ascend_from_subtype(type_path_t *path)
3396 type_path_entry_t *top = get_type_path_top(path);
3398 path->top_type = top->type;
3400 size_t len = ARR_LEN(path->path);
3401 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3404 static void walk_designator(type_path_t *path, const designator_t *designator)
3406 /* designators start at current object type */
3407 ARR_RESIZE(type_path_entry_t, path->path, 1);
3409 for ( ; designator != NULL; designator = designator->next) {
3410 type_path_entry_t *top = get_type_path_top(path);
3411 type_t *orig_type = top->type;
3412 type_t *type = skip_typeref(orig_type);
3414 if (designator->symbol != NULL) {
3415 assert(is_type_compound(type));
3417 symbol_t *symbol = designator->symbol;
3419 compound_t *compound = type->compound.compound;
3420 entity_t *iter = compound->members.entities;
3421 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3422 if (iter->base.symbol == symbol) {
3423 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3427 assert(iter != NULL);
3429 top->type = orig_type;
3430 top->compound_entry = iter;
3432 orig_type = iter->declaration.type;
3434 expression_t *array_index = designator->array_index;
3435 assert(designator->array_index != NULL);
3436 assert(is_type_array(type));
3438 long index = fold_constant(array_index);
3441 if (type->array.size_constant) {
3442 long array_size = type->array.size;
3443 assert(index < array_size);
3447 top->type = orig_type;
3448 top->index = (size_t) index;
3449 orig_type = type->array.element_type;
3451 path->top_type = orig_type;
3453 if (designator->next != NULL) {
3454 descend_into_subtype(path);
3458 path->invalid = false;
3461 static void advance_current_object(type_path_t *path)
3463 if (path->invalid) {
3464 /* TODO: handle this... */
3465 panic("invalid initializer in ast2firm (excessive elements)");
3469 type_path_entry_t *top = get_type_path_top(path);
3471 type_t *type = skip_typeref(top->type);
3472 if (is_type_union(type)) {
3473 top->compound_entry = NULL;
3474 } else if (is_type_struct(type)) {
3475 entity_t *entry = top->compound_entry;
3478 entry = entry->base.next;
3479 top->compound_entry = entry;
3480 if (entry != NULL) {
3481 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3482 path->top_type = entry->declaration.type;
3486 assert(is_type_array(type));
3489 if (!type->array.size_constant || top->index < type->array.size) {
3494 /* we're past the last member of the current sub-aggregate, try if we
3495 * can ascend in the type hierarchy and continue with another subobject */
3496 size_t len = ARR_LEN(path->path);
3499 ascend_from_subtype(path);
3500 advance_current_object(path);
3502 path->invalid = true;
3507 static ir_initializer_t *create_ir_initializer(
3508 const initializer_t *initializer, type_t *type);
3510 static ir_initializer_t *create_ir_initializer_value(
3511 const initializer_value_t *initializer)
3513 if (is_type_compound(initializer->value->base.type)) {
3514 panic("initializer creation for compounds not implemented yet");
3516 ir_node *value = expression_to_firm(initializer->value);
3517 return create_initializer_const(value);
3520 /** test wether type can be initialized by a string constant */
3521 static bool is_string_type(type_t *type)
3524 if (is_type_pointer(type)) {
3525 inner = skip_typeref(type->pointer.points_to);
3526 } else if(is_type_array(type)) {
3527 inner = skip_typeref(type->array.element_type);
3532 return is_type_integer(inner);
3535 static ir_initializer_t *create_ir_initializer_list(
3536 const initializer_list_t *initializer, type_t *type)
3539 memset(&path, 0, sizeof(path));
3540 path.top_type = type;
3541 path.path = NEW_ARR_F(type_path_entry_t, 0);
3543 descend_into_subtype(&path);
3545 for (size_t i = 0; i < initializer->len; ++i) {
3546 const initializer_t *sub_initializer = initializer->initializers[i];
3548 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3549 walk_designator(&path, sub_initializer->designator.designator);
3553 if (sub_initializer->kind == INITIALIZER_VALUE) {
3554 /* we might have to descend into types until we're at a scalar
3557 type_t *orig_top_type = path.top_type;
3558 type_t *top_type = skip_typeref(orig_top_type);
3560 if (is_type_scalar(top_type))
3562 descend_into_subtype(&path);
3564 } else if (sub_initializer->kind == INITIALIZER_STRING
3565 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3566 /* we might have to descend into types until we're at a scalar
3569 type_t *orig_top_type = path.top_type;
3570 type_t *top_type = skip_typeref(orig_top_type);
3572 if (is_string_type(top_type))
3574 descend_into_subtype(&path);
3578 ir_initializer_t *sub_irinitializer
3579 = create_ir_initializer(sub_initializer, path.top_type);
3581 size_t path_len = ARR_LEN(path.path);
3582 assert(path_len >= 1);
3583 type_path_entry_t *entry = & path.path[path_len-1];
3584 ir_initializer_t *tinitializer = entry->initializer;
3585 set_initializer_compound_value(tinitializer, entry->index,
3588 advance_current_object(&path);
3591 assert(ARR_LEN(path.path) >= 1);
3592 ir_initializer_t *result = path.path[0].initializer;
3593 DEL_ARR_F(path.path);
3598 static ir_initializer_t *create_ir_initializer_string(
3599 const initializer_string_t *initializer, type_t *type)
3601 type = skip_typeref(type);
3603 size_t string_len = initializer->string.size;
3604 assert(type->kind == TYPE_ARRAY);
3605 assert(type->array.size_constant);
3606 size_t len = type->array.size;
3607 ir_initializer_t *irinitializer = create_initializer_compound(len);
3609 const char *string = initializer->string.begin;
3610 ir_mode *mode = get_ir_mode(type->array.element_type);
3612 for (size_t i = 0; i < len; ++i) {
3617 tarval *tv = new_tarval_from_long(c, mode);
3618 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3620 set_initializer_compound_value(irinitializer, i, char_initializer);
3623 return irinitializer;
3626 static ir_initializer_t *create_ir_initializer_wide_string(
3627 const initializer_wide_string_t *initializer, type_t *type)
3629 size_t string_len = initializer->string.size;
3630 assert(type->kind == TYPE_ARRAY);
3631 assert(type->array.size_constant);
3632 size_t len = type->array.size;
3633 ir_initializer_t *irinitializer = create_initializer_compound(len);
3635 const wchar_rep_t *string = initializer->string.begin;
3636 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3638 for (size_t i = 0; i < len; ++i) {
3640 if (i < string_len) {
3643 tarval *tv = new_tarval_from_long(c, mode);
3644 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3646 set_initializer_compound_value(irinitializer, i, char_initializer);
3649 return irinitializer;
3652 static ir_initializer_t *create_ir_initializer(
3653 const initializer_t *initializer, type_t *type)
3655 switch(initializer->kind) {
3656 case INITIALIZER_STRING:
3657 return create_ir_initializer_string(&initializer->string, type);
3659 case INITIALIZER_WIDE_STRING:
3660 return create_ir_initializer_wide_string(&initializer->wide_string,
3663 case INITIALIZER_LIST:
3664 return create_ir_initializer_list(&initializer->list, type);
3666 case INITIALIZER_VALUE:
3667 return create_ir_initializer_value(&initializer->value);
3669 case INITIALIZER_DESIGNATOR:
3670 panic("unexpected designator initializer found");
3672 panic("unknown initializer");
3675 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3678 if (is_atomic_type(type)) {
3679 ir_mode *mode = get_type_mode(type);
3680 tarval *zero = get_mode_null(mode);
3681 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3683 /* TODO: bitfields */
3684 ir_node *mem = get_store();
3685 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3686 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3689 assert(is_compound_type(type));
3692 if (is_Array_type(type)) {
3693 assert(has_array_upper_bound(type, 0));
3694 n_members = get_array_upper_bound_int(type, 0);
3696 n_members = get_compound_n_members(type);
3699 for (int i = 0; i < n_members; ++i) {
3702 if (is_Array_type(type)) {
3703 ir_entity *entity = get_array_element_entity(type);
3704 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3705 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3706 ir_node *in[1] = { cnst };
3707 irtype = get_array_element_type(type);
3708 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3710 ir_entity *member = get_compound_member(type, i);
3712 irtype = get_entity_type(member);
3713 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3716 create_dynamic_null_initializer(irtype, dbgi, addr);
3721 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3722 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3724 switch(get_initializer_kind(initializer)) {
3725 case IR_INITIALIZER_NULL: {
3726 create_dynamic_null_initializer(type, dbgi, base_addr);
3729 case IR_INITIALIZER_CONST: {
3730 ir_node *node = get_initializer_const_value(initializer);
3731 ir_mode *mode = get_irn_mode(node);
3732 ir_type *ent_type = get_entity_type(entity);
3734 /* is it a bitfield type? */
3735 if (is_Primitive_type(ent_type) &&
3736 get_primitive_base_type(ent_type) != NULL) {
3737 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3741 assert(get_type_mode(type) == mode);
3742 ir_node *mem = get_store();
3743 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3744 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3748 case IR_INITIALIZER_TARVAL: {
3749 tarval *tv = get_initializer_tarval_value(initializer);
3750 ir_mode *mode = get_tarval_mode(tv);
3751 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3752 ir_type *ent_type = get_entity_type(entity);
3754 /* is it a bitfield type? */
3755 if (is_Primitive_type(ent_type) &&
3756 get_primitive_base_type(ent_type) != NULL) {
3757 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3761 assert(get_type_mode(type) == mode);
3762 ir_node *mem = get_store();
3763 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3764 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3768 case IR_INITIALIZER_COMPOUND: {
3769 assert(is_compound_type(type));
3771 if (is_Array_type(type)) {
3772 assert(has_array_upper_bound(type, 0));
3773 n_members = get_array_upper_bound_int(type, 0);
3775 n_members = get_compound_n_members(type);
3778 if (get_initializer_compound_n_entries(initializer)
3779 != (unsigned) n_members)
3780 panic("initializer doesn't match compound type");
3782 for (int i = 0; i < n_members; ++i) {
3785 ir_entity *sub_entity;
3786 if (is_Array_type(type)) {
3787 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3788 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3789 ir_node *in[1] = { cnst };
3790 irtype = get_array_element_type(type);
3791 sub_entity = get_array_element_entity(type);
3792 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3795 sub_entity = get_compound_member(type, i);
3796 irtype = get_entity_type(sub_entity);
3797 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3801 ir_initializer_t *sub_init
3802 = get_initializer_compound_value(initializer, i);
3804 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3811 panic("invalid IR_INITIALIZER found");
3814 static void create_dynamic_initializer(ir_initializer_t *initializer,
3815 dbg_info *dbgi, ir_entity *entity)
3817 ir_node *frame = get_local_frame(entity);
3818 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3819 ir_type *type = get_entity_type(entity);
3821 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3824 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3825 ir_entity *entity, type_t *type)
3827 ir_node *memory = get_store();
3828 ir_node *nomem = new_NoMem();
3829 ir_node *frame = get_irg_frame(current_ir_graph);
3830 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3832 if (initializer->kind == INITIALIZER_VALUE) {
3833 initializer_value_t *initializer_value = &initializer->value;
3835 ir_node *value = expression_to_firm(initializer_value->value);
3836 type = skip_typeref(type);
3837 assign_value(dbgi, addr, type, value);
3841 if (!is_constant_initializer(initializer)) {
3842 ir_initializer_t *irinitializer
3843 = create_ir_initializer(initializer, type);
3845 create_dynamic_initializer(irinitializer, dbgi, entity);
3849 /* create the ir_initializer */
3850 ir_graph *const old_current_ir_graph = current_ir_graph;
3851 current_ir_graph = get_const_code_irg();
3853 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3855 assert(current_ir_graph == get_const_code_irg());
3856 current_ir_graph = old_current_ir_graph;
3858 /* create a "template" entity which is copied to the entity on the stack */
3859 ident *const id = id_unique("initializer.%u");
3860 ir_type *const irtype = get_ir_type(type);
3861 ir_type *const global_type = get_glob_type();
3862 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3863 set_entity_ld_ident(init_entity, id);
3865 set_entity_variability(init_entity, variability_initialized);
3866 set_entity_visibility(init_entity, visibility_local);
3867 set_entity_allocation(init_entity, allocation_static);
3869 set_entity_initializer(init_entity, irinitializer);
3871 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3872 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3874 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3875 set_store(copyb_mem);
3878 static void create_initializer_local_variable_entity(entity_t *entity)
3880 assert(entity->kind == ENTITY_VARIABLE);
3881 initializer_t *initializer = entity->variable.initializer;
3882 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3883 ir_entity *irentity = entity->variable.v.entity;
3884 type_t *type = entity->declaration.type;
3885 create_local_initializer(initializer, dbgi, irentity, type);
3888 static void create_variable_initializer(entity_t *entity)
3890 assert(entity->kind == ENTITY_VARIABLE);
3891 initializer_t *initializer = entity->variable.initializer;
3892 if (initializer == NULL)
3895 declaration_kind_t declaration_kind
3896 = (declaration_kind_t) entity->declaration.kind;
3897 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3898 create_initializer_local_variable_entity(entity);
3902 type_t *type = entity->declaration.type;
3903 type_qualifiers_t tq = get_type_qualifier(type, true);
3905 if (initializer->kind == INITIALIZER_VALUE) {
3906 initializer_value_t *initializer_value = &initializer->value;
3907 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3909 ir_node *value = expression_to_firm(initializer_value->value);
3910 value = do_strict_conv(dbgi, value);
3912 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3913 set_value(entity->variable.v.value_number, value);
3915 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3917 ir_entity *irentity = entity->variable.v.entity;
3919 if (tq & TYPE_QUALIFIER_CONST) {
3920 set_entity_variability(irentity, variability_constant);
3922 set_entity_variability(irentity, variability_initialized);
3924 set_atomic_ent_value(irentity, value);
3927 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3928 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3930 ir_entity *irentity = entity->variable.v.entity;
3931 ir_initializer_t *irinitializer
3932 = create_ir_initializer(initializer, type);
3934 if (tq & TYPE_QUALIFIER_CONST) {
3935 set_entity_variability(irentity, variability_constant);
3937 set_entity_variability(irentity, variability_initialized);
3939 set_entity_initializer(irentity, irinitializer);
3943 static void create_variable_length_array(entity_t *entity)
3945 assert(entity->kind == ENTITY_VARIABLE);
3946 assert(entity->variable.initializer == NULL);
3948 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3949 entity->variable.v.vla_base = NULL;
3951 /* TODO: record VLA somewhere so we create the free node when we leave
3955 static void allocate_variable_length_array(entity_t *entity)
3957 assert(entity->kind == ENTITY_VARIABLE);
3958 assert(entity->variable.initializer == NULL);
3959 assert(get_cur_block() != NULL);
3961 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3962 type_t *type = entity->declaration.type;
3963 ir_type *el_type = get_ir_type(type->array.element_type);
3965 /* make sure size_node is calculated */
3966 get_type_size(type);
3967 ir_node *elems = type->array.size_node;
3968 ir_node *mem = get_store();
3969 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3971 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3972 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3975 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3976 entity->variable.v.vla_base = addr;
3980 * Creates a Firm local variable from a declaration.
3982 static void create_local_variable(entity_t *entity)
3984 assert(entity->kind == ENTITY_VARIABLE);
3985 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3987 bool needs_entity = entity->variable.address_taken;
3988 type_t *type = skip_typeref(entity->declaration.type);
3990 /* is it a variable length array? */
3991 if (is_type_array(type) && !type->array.size_constant) {
3992 create_variable_length_array(entity);
3994 } else if (is_type_array(type) || is_type_compound(type)) {
3995 needs_entity = true;
3996 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3997 needs_entity = true;
4001 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4002 create_variable_entity(entity,
4003 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4006 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4007 entity->variable.v.value_number = next_value_number_function;
4008 set_irg_loc_description(current_ir_graph, next_value_number_function,
4009 (variable_t*) &entity->variable);
4010 ++next_value_number_function;
4014 static void create_local_static_variable(entity_t *entity)
4016 assert(entity->kind == ENTITY_VARIABLE);
4017 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4019 type_t *const type = skip_typeref(entity->declaration.type);
4020 ir_type *const global_type = get_glob_type();
4021 ir_type *const irtype = get_ir_type(type);
4022 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4024 size_t l = strlen(entity->base.symbol->string);
4025 char buf[l + sizeof(".%u")];
4026 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4027 ident *const id = id_unique(buf);
4029 ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4031 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4032 set_entity_volatility(irentity, volatility_is_volatile);
4035 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4036 entity->variable.v.entity = irentity;
4037 set_entity_ld_ident(irentity, id);
4038 set_entity_variability(irentity, variability_uninitialized);
4039 set_entity_visibility(irentity, visibility_local);
4040 set_entity_allocation(irentity, allocation_static);
4042 ir_graph *const old_current_ir_graph = current_ir_graph;
4043 current_ir_graph = get_const_code_irg();
4045 create_variable_initializer(entity);
4047 assert(current_ir_graph == get_const_code_irg());
4048 current_ir_graph = old_current_ir_graph;
4053 static void return_statement_to_firm(return_statement_t *statement)
4055 if (get_cur_block() == NULL)
4058 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4059 type_t *type = current_function_entity->declaration.type;
4060 ir_type *func_irtype = get_ir_type(type);
4065 if (get_method_n_ress(func_irtype) > 0) {
4066 ir_type *res_type = get_method_res_type(func_irtype, 0);
4068 if (statement->value != NULL) {
4069 ir_node *node = expression_to_firm(statement->value);
4070 node = do_strict_conv(dbgi, node);
4074 if (is_compound_type(res_type)) {
4077 mode = get_type_mode(res_type);
4079 in[0] = new_Unknown(mode);
4083 /* build return_value for its side effects */
4084 if (statement->value != NULL) {
4085 expression_to_firm(statement->value);
4090 ir_node *store = get_store();
4091 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4093 ir_node *end_block = get_irg_end_block(current_ir_graph);
4094 add_immBlock_pred(end_block, ret);
4096 set_cur_block(NULL);
4099 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4101 if (get_cur_block() == NULL)
4104 return expression_to_firm(statement->expression);
4107 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4109 entity_t *entity = compound->scope.entities;
4110 for ( ; entity != NULL; entity = entity->base.next) {
4111 if (!is_declaration(entity))
4114 create_local_declaration(entity);
4117 ir_node *result = NULL;
4118 statement_t *statement = compound->statements;
4119 for ( ; statement != NULL; statement = statement->base.next) {
4120 if (statement->base.next == NULL
4121 && statement->kind == STATEMENT_EXPRESSION) {
4122 result = expression_statement_to_firm(
4123 &statement->expression);
4126 statement_to_firm(statement);
4132 static void create_global_variable(entity_t *entity)
4134 assert(entity->kind == ENTITY_VARIABLE);
4138 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4139 case STORAGE_CLASS_STATIC:
4140 vis = visibility_local;
4143 case STORAGE_CLASS_EXTERN:
4144 vis = visibility_external_allocated;
4147 case STORAGE_CLASS_NONE:
4148 vis = visibility_external_visible;
4151 case STORAGE_CLASS_THREAD:
4152 vis = visibility_external_visible;
4155 case STORAGE_CLASS_THREAD_EXTERN:
4156 vis = visibility_external_allocated;
4159 case STORAGE_CLASS_THREAD_STATIC:
4160 vis = visibility_local;
4164 var_type = get_tls_type();
4168 var_type = get_glob_type();
4172 create_variable_entity(entity,
4173 DECLARATION_KIND_GLOBAL_VARIABLE,
4175 /* Matze: I'm confused, shouldn't we only be here when creating
4178 if (!is_type_function(skip_typeref(entity->declaration.type))) {
4179 set_entity_visibility(declaration->v.entity, vis);
4182 set_entity_visibility(entity->variable.v.entity, vis);
4187 case STORAGE_CLASS_TYPEDEF:
4188 case STORAGE_CLASS_AUTO:
4189 case STORAGE_CLASS_REGISTER:
4192 panic("Invalid storage class for global variable");
4195 static void create_local_declaration(entity_t *entity)
4197 assert(is_declaration(entity));
4199 /* construct type */
4200 (void) get_ir_type(entity->declaration.type);
4201 if (entity->base.symbol == NULL) {
4205 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4206 case STORAGE_CLASS_STATIC:
4207 create_local_static_variable(entity);
4209 case STORAGE_CLASS_EXTERN:
4210 if (entity->kind == ENTITY_FUNCTION) {
4211 assert(entity->function.statement == NULL);
4212 get_function_entity(entity);
4214 create_global_variable(entity);
4215 create_variable_initializer(entity);
4218 case STORAGE_CLASS_NONE:
4219 case STORAGE_CLASS_AUTO:
4220 case STORAGE_CLASS_REGISTER:
4221 if (entity->kind == ENTITY_FUNCTION) {
4222 if (entity->function.statement != NULL) {
4223 get_function_entity(entity);
4224 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4225 enqueue_inner_function(entity);
4227 get_function_entity(entity);
4230 create_local_variable(entity);
4233 case STORAGE_CLASS_TYPEDEF:
4234 case STORAGE_CLASS_THREAD:
4235 case STORAGE_CLASS_THREAD_EXTERN:
4236 case STORAGE_CLASS_THREAD_STATIC:
4239 panic("invalid storage class found");
4242 static void initialize_local_declaration(entity_t *entity)
4244 if (entity->base.symbol == NULL)
4247 switch ((declaration_kind_t) entity->declaration.kind) {
4248 case DECLARATION_KIND_LOCAL_VARIABLE:
4249 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4250 create_variable_initializer(entity);
4253 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4254 allocate_variable_length_array(entity);
4257 case DECLARATION_KIND_COMPOUND_MEMBER:
4258 case DECLARATION_KIND_GLOBAL_VARIABLE:
4259 case DECLARATION_KIND_FUNCTION:
4260 case DECLARATION_KIND_INNER_FUNCTION:
4263 case DECLARATION_KIND_UNKNOWN:
4264 panic("can't initialize unknown declaration");
4266 panic("invalid declaration kind");
4269 static void declaration_statement_to_firm(declaration_statement_t *statement)
4271 entity_t *entity = statement->declarations_begin;
4272 entity_t *end = statement->declarations_end->base.next;
4273 for ( ; entity != end; entity = entity->base.next) {
4274 if (!is_declaration(entity))
4276 initialize_local_declaration(entity);
4280 static void if_statement_to_firm(if_statement_t *statement)
4282 ir_node *cur_block = get_cur_block();
4284 ir_node *fallthrough_block = NULL;
4286 /* the true (blocks) */
4287 ir_node *true_block = NULL;
4288 if (statement->true_statement != NULL) {
4289 true_block = new_immBlock();
4290 statement_to_firm(statement->true_statement);
4291 if (get_cur_block() != NULL) {
4292 ir_node *jmp = new_Jmp();
4293 if (fallthrough_block == NULL)
4294 fallthrough_block = new_immBlock();
4295 add_immBlock_pred(fallthrough_block, jmp);
4299 /* the false (blocks) */
4300 ir_node *false_block = NULL;
4301 if (statement->false_statement != NULL) {
4302 false_block = new_immBlock();
4304 statement_to_firm(statement->false_statement);
4305 if (get_cur_block() != NULL) {
4306 ir_node *jmp = new_Jmp();
4307 if (fallthrough_block == NULL)
4308 fallthrough_block = new_immBlock();
4309 add_immBlock_pred(fallthrough_block, jmp);
4313 /* create the condition */
4314 if (cur_block != NULL) {
4315 if (true_block == NULL || false_block == NULL) {
4316 if (fallthrough_block == NULL)
4317 fallthrough_block = new_immBlock();
4318 if (true_block == NULL)
4319 true_block = fallthrough_block;
4320 if (false_block == NULL)
4321 false_block = fallthrough_block;
4324 set_cur_block(cur_block);
4325 create_condition_evaluation(statement->condition, true_block,
4329 mature_immBlock(true_block);
4330 if (false_block != fallthrough_block && false_block != NULL) {
4331 mature_immBlock(false_block);
4333 if (fallthrough_block != NULL) {
4334 mature_immBlock(fallthrough_block);
4337 set_cur_block(fallthrough_block);
4340 static void while_statement_to_firm(while_statement_t *statement)
4342 ir_node *jmp = NULL;
4343 if (get_cur_block() != NULL) {
4347 /* create the header block */
4348 ir_node *header_block = new_immBlock();
4350 add_immBlock_pred(header_block, jmp);
4354 ir_node *old_continue_label = continue_label;
4355 ir_node *old_break_label = break_label;
4356 continue_label = header_block;
4359 ir_node *body_block = new_immBlock();
4360 statement_to_firm(statement->body);
4361 ir_node *false_block = break_label;
4363 assert(continue_label == header_block);
4364 continue_label = old_continue_label;
4365 break_label = old_break_label;
4367 if (get_cur_block() != NULL) {
4369 add_immBlock_pred(header_block, jmp);
4372 /* shortcut for while(true) */
4373 if (is_constant_expression(statement->condition)
4374 && fold_constant(statement->condition) != 0) {
4375 set_cur_block(header_block);
4376 ir_node *header_jmp = new_Jmp();
4377 add_immBlock_pred(body_block, header_jmp);
4379 keep_alive(body_block);
4380 keep_all_memory(body_block);
4381 set_cur_block(body_block);
4383 if (false_block == NULL) {
4384 false_block = new_immBlock();
4387 /* create the condition */
4388 set_cur_block(header_block);
4390 create_condition_evaluation(statement->condition, body_block,
4394 mature_immBlock(body_block);
4395 mature_immBlock(header_block);
4396 if (false_block != NULL) {
4397 mature_immBlock(false_block);
4400 set_cur_block(false_block);
4403 static void do_while_statement_to_firm(do_while_statement_t *statement)
4405 ir_node *jmp = NULL;
4406 if (get_cur_block() != NULL) {
4410 /* create the header block */
4411 ir_node *header_block = new_immBlock();
4414 ir_node *body_block = new_immBlock();
4416 add_immBlock_pred(body_block, jmp);
4419 ir_node *old_continue_label = continue_label;
4420 ir_node *old_break_label = break_label;
4421 continue_label = header_block;
4424 statement_to_firm(statement->body);
4425 ir_node *false_block = break_label;
4427 assert(continue_label == header_block);
4428 continue_label = old_continue_label;
4429 break_label = old_break_label;
4431 if (get_cur_block() != NULL) {
4432 ir_node *body_jmp = new_Jmp();
4433 add_immBlock_pred(header_block, body_jmp);
4434 mature_immBlock(header_block);
4437 if (false_block == NULL) {
4438 false_block = new_immBlock();
4441 /* create the condition */
4442 set_cur_block(header_block);
4444 create_condition_evaluation(statement->condition, body_block, false_block);
4445 mature_immBlock(body_block);
4446 mature_immBlock(header_block);
4447 if (false_block != NULL) {
4448 mature_immBlock(false_block);
4451 set_cur_block(false_block);
4454 static void for_statement_to_firm(for_statement_t *statement)
4456 ir_node *jmp = NULL;
4458 /* create declarations */
4459 entity_t *entity = statement->scope.entities;
4460 for ( ; entity != NULL; entity = entity->base.next) {
4461 if (!is_declaration(entity))
4464 create_local_declaration(entity);
4467 if (get_cur_block() != NULL) {
4468 entity = statement->scope.entities;
4469 for ( ; entity != NULL; entity = entity->base.next) {
4470 if (!is_declaration(entity))
4473 initialize_local_declaration(entity);
4476 if (statement->initialisation != NULL) {
4477 expression_to_firm(statement->initialisation);
4484 /* create the step block */
4485 ir_node *const step_block = new_immBlock();
4486 if (statement->step != NULL) {
4487 expression_to_firm(statement->step);
4489 ir_node *const step_jmp = new_Jmp();
4491 /* create the header block */
4492 ir_node *const header_block = new_immBlock();
4494 add_immBlock_pred(header_block, jmp);
4496 add_immBlock_pred(header_block, step_jmp);
4498 /* the false block */
4499 ir_node *const false_block = new_immBlock();
4502 ir_node * body_block;
4503 if (statement->body != NULL) {
4504 ir_node *const old_continue_label = continue_label;
4505 ir_node *const old_break_label = break_label;
4506 continue_label = step_block;
4507 break_label = false_block;
4509 body_block = new_immBlock();
4510 statement_to_firm(statement->body);
4512 assert(continue_label == step_block);
4513 assert(break_label == false_block);
4514 continue_label = old_continue_label;
4515 break_label = old_break_label;
4517 if (get_cur_block() != NULL) {
4519 add_immBlock_pred(step_block, jmp);
4522 body_block = step_block;
4525 /* create the condition */
4526 set_cur_block(header_block);
4527 if (statement->condition != NULL) {
4528 create_condition_evaluation(statement->condition, body_block,
4531 keep_alive(header_block);
4532 keep_all_memory(header_block);
4534 add_immBlock_pred(body_block, jmp);
4537 mature_immBlock(body_block);
4538 mature_immBlock(false_block);
4539 mature_immBlock(step_block);
4540 mature_immBlock(header_block);
4541 mature_immBlock(false_block);
4543 set_cur_block(false_block);
4546 static void create_jump_statement(const statement_t *statement,
4547 ir_node *target_block)
4549 if (get_cur_block() == NULL)
4552 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4553 ir_node *jump = new_d_Jmp(dbgi);
4554 add_immBlock_pred(target_block, jump);
4556 set_cur_block(NULL);
4559 static ir_node *get_break_label(void)
4561 if (break_label == NULL) {
4562 ir_node *cur_block = get_cur_block();
4563 break_label = new_immBlock();
4564 set_cur_block(cur_block);
4569 static void switch_statement_to_firm(switch_statement_t *statement)
4571 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4573 ir_node *expression = expression_to_firm(statement->expression);
4574 ir_node *cond = new_d_Cond(dbgi, expression);
4576 set_cur_block(NULL);
4578 ir_node *const old_switch_cond = current_switch_cond;
4579 ir_node *const old_break_label = break_label;
4580 const bool old_saw_default_label = saw_default_label;
4581 saw_default_label = false;
4582 current_switch_cond = cond;
4584 switch_statement_t *const old_switch = current_switch;
4585 current_switch = statement;
4587 /* determine a free number for the default label */
4588 unsigned long num_cases = 0;
4590 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4591 if (l->expression == NULL) {
4595 if (l->last_case >= l->first_case)
4596 num_cases += l->last_case - l->first_case + 1;
4597 if (l->last_case > def_nr)
4598 def_nr = l->last_case;
4601 if (def_nr == INT_MAX) {
4602 /* Bad: an overflow will occurr, we cannot be sure that the
4603 * maximum + 1 is a free number. Scan the values a second
4604 * time to find a free number.
4606 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4608 memset(bits, 0, (num_cases + 7) >> 3);
4609 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4610 if (l->expression == NULL) {
4614 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4615 if (start < num_cases && l->last_case >= 0) {
4616 unsigned long end = (unsigned long)l->last_case < num_cases ?
4617 (unsigned long)l->last_case : num_cases - 1;
4618 for (unsigned long cns = start; cns <= end; ++cns) {
4619 bits[cns >> 3] |= (1 << (cns & 7));
4623 /* We look at the first num_cases constants:
4624 * Either they are densed, so we took the last (num_cases)
4625 * one, or they are non densed, so we will find one free
4629 for (i = 0; i < num_cases; ++i)
4630 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4638 statement->default_proj_nr = def_nr;
4640 if (statement->body != NULL) {
4641 statement_to_firm(statement->body);
4644 if (get_cur_block() != NULL) {
4645 ir_node *jmp = new_Jmp();
4646 add_immBlock_pred(get_break_label(), jmp);
4649 if (!saw_default_label) {
4650 set_cur_block(get_nodes_block(cond));
4651 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4652 statement->default_proj_nr);
4653 add_immBlock_pred(get_break_label(), proj);
4656 if (break_label != NULL) {
4657 mature_immBlock(break_label);
4659 set_cur_block(break_label);
4661 assert(current_switch_cond == cond);
4662 current_switch = old_switch;
4663 current_switch_cond = old_switch_cond;
4664 break_label = old_break_label;
4665 saw_default_label = old_saw_default_label;
4668 static void case_label_to_firm(const case_label_statement_t *statement)
4670 if (statement->is_empty_range)
4673 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4675 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4678 ir_node *old_block = get_nodes_block(current_switch_cond);
4679 ir_node *block = new_immBlock();
4681 set_cur_block(old_block);
4682 if (statement->expression != NULL) {
4683 long pn = statement->first_case;
4684 long end_pn = statement->last_case;
4685 assert(pn <= end_pn);
4686 /* create jumps for all cases in the given range */
4688 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4689 add_immBlock_pred(block, proj);
4690 } while(pn++ < end_pn);
4692 saw_default_label = true;
4693 proj = new_d_defaultProj(dbgi, current_switch_cond,
4694 current_switch->default_proj_nr);
4696 add_immBlock_pred(block, proj);
4699 if (fallthrough != NULL) {
4700 add_immBlock_pred(block, fallthrough);
4702 mature_immBlock(block);
4703 set_cur_block(block);
4705 if (statement->statement != NULL) {
4706 statement_to_firm(statement->statement);
4710 static void label_to_firm(const label_statement_t *statement)
4712 ir_node *block = get_label_block(statement->label);
4714 if (get_cur_block() != NULL) {
4715 ir_node *jmp = new_Jmp();
4716 add_immBlock_pred(block, jmp);
4719 set_cur_block(block);
4721 keep_all_memory(block);
4723 if (statement->statement != NULL) {
4724 statement_to_firm(statement->statement);
4728 static void goto_to_firm(const goto_statement_t *statement)
4730 if (get_cur_block() == NULL)
4733 if (statement->expression) {
4734 ir_node *irn = expression_to_firm(statement->expression);
4735 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4736 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4738 set_irn_link(ijmp, ijmp_list);
4741 ir_node *block = get_label_block(statement->label);
4742 ir_node *jmp = new_Jmp();
4743 add_immBlock_pred(block, jmp);
4745 set_cur_block(NULL);
4748 static void asm_statement_to_firm(const asm_statement_t *statement)
4750 bool needs_memory = false;
4752 if (statement->is_volatile) {
4753 needs_memory = true;
4756 size_t n_clobbers = 0;
4757 asm_clobber_t *clobber = statement->clobbers;
4758 for ( ; clobber != NULL; clobber = clobber->next) {
4759 const char *clobber_str = clobber->clobber.begin;
4761 if (!be_is_valid_clobber(clobber_str)) {
4762 errorf(&statement->base.source_position,
4763 "invalid clobber '%s' specified", clobber->clobber);
4767 if (strcmp(clobber_str, "memory") == 0) {
4768 needs_memory = true;
4772 ident *id = new_id_from_str(clobber_str);
4773 obstack_ptr_grow(&asm_obst, id);
4776 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4777 ident **clobbers = NULL;
4778 if (n_clobbers > 0) {
4779 clobbers = obstack_finish(&asm_obst);
4782 size_t n_inputs = 0;
4783 asm_argument_t *argument = statement->inputs;
4784 for ( ; argument != NULL; argument = argument->next)
4786 size_t n_outputs = 0;
4787 argument = statement->outputs;
4788 for ( ; argument != NULL; argument = argument->next)
4791 unsigned next_pos = 0;
4793 ir_node *ins[n_inputs + n_outputs + 1];
4796 ir_asm_constraint tmp_in_constraints[n_outputs];
4798 const expression_t *out_exprs[n_outputs];
4799 ir_node *out_addrs[n_outputs];
4800 size_t out_size = 0;
4802 argument = statement->outputs;
4803 for ( ; argument != NULL; argument = argument->next) {
4804 const char *constraints = argument->constraints.begin;
4805 asm_constraint_flags_t asm_flags
4806 = be_parse_asm_constraints(constraints);
4808 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4809 errorf(&statement->base.source_position,
4810 "some constraints in '%s' are not supported", constraints);
4813 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4814 errorf(&statement->base.source_position,
4815 "some constraints in '%s' are invalid", constraints);
4818 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4819 errorf(&statement->base.source_position,
4820 "no write flag specified for output constraints '%s'",
4825 unsigned pos = next_pos++;
4826 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4827 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4828 expression_t *expr = argument->expression;
4829 ir_node *addr = expression_to_addr(expr);
4830 /* in+output, construct an artifical same_as constraint on the
4832 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4834 ir_node *value = get_value_from_lvalue(expr, addr);
4836 snprintf(buf, sizeof(buf), "%u", pos);
4838 ir_asm_constraint constraint;
4839 constraint.pos = pos;
4840 constraint.constraint = new_id_from_str(buf);
4841 constraint.mode = get_ir_mode(expr->base.type);
4842 tmp_in_constraints[in_size] = constraint;
4843 ins[in_size] = value;
4848 out_exprs[out_size] = expr;
4849 out_addrs[out_size] = addr;
4851 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4852 /* pure memory ops need no input (but we have to make sure we
4853 * attach to the memory) */
4854 assert(! (asm_flags &
4855 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4856 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4857 needs_memory = true;
4859 /* we need to attach the address to the inputs */
4860 expression_t *expr = argument->expression;
4862 ir_asm_constraint constraint;
4863 constraint.pos = pos;
4864 constraint.constraint = new_id_from_str(constraints);
4865 constraint.mode = NULL;
4866 tmp_in_constraints[in_size] = constraint;
4868 ins[in_size] = expression_to_addr(expr);
4872 errorf(&statement->base.source_position,
4873 "only modifiers but no place set in constraints '%s'",
4878 ir_asm_constraint constraint;
4879 constraint.pos = pos;
4880 constraint.constraint = new_id_from_str(constraints);
4881 constraint.mode = get_ir_mode(argument->expression->base.type);
4883 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4885 assert(obstack_object_size(&asm_obst)
4886 == out_size * sizeof(ir_asm_constraint));
4887 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4890 obstack_grow(&asm_obst, tmp_in_constraints,
4891 in_size * sizeof(tmp_in_constraints[0]));
4892 /* find and count input and output arguments */
4893 argument = statement->inputs;
4894 for ( ; argument != NULL; argument = argument->next) {
4895 const char *constraints = argument->constraints.begin;
4896 asm_constraint_flags_t asm_flags
4897 = be_parse_asm_constraints(constraints);
4899 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4900 errorf(&statement->base.source_position,
4901 "some constraints in '%s' are not supported", constraints);
4904 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4905 errorf(&statement->base.source_position,
4906 "some constraints in '%s' are invalid", constraints);
4909 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4910 errorf(&statement->base.source_position,
4911 "write flag specified for input constraints '%s'",
4917 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4918 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4919 /* we can treat this as "normal" input */
4920 input = expression_to_firm(argument->expression);
4921 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4922 /* pure memory ops need no input (but we have to make sure we
4923 * attach to the memory) */
4924 assert(! (asm_flags &
4925 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4926 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4927 needs_memory = true;
4928 input = expression_to_addr(argument->expression);
4930 errorf(&statement->base.source_position,
4931 "only modifiers but no place set in constraints '%s'",
4936 ir_asm_constraint constraint;
4937 constraint.pos = next_pos++;
4938 constraint.constraint = new_id_from_str(constraints);
4939 constraint.mode = get_irn_mode(input);
4941 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4942 ins[in_size++] = input;
4946 ir_asm_constraint constraint;
4947 constraint.pos = next_pos++;
4948 constraint.constraint = new_id_from_str("");
4949 constraint.mode = mode_M;
4951 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4952 ins[in_size++] = get_store();
4955 assert(obstack_object_size(&asm_obst)
4956 == in_size * sizeof(ir_asm_constraint));
4957 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4959 /* create asm node */
4960 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4962 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4964 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4965 out_size, output_constraints,
4966 n_clobbers, clobbers, asm_text);
4968 if (statement->is_volatile) {
4969 set_irn_pinned(node, op_pin_state_pinned);
4971 set_irn_pinned(node, op_pin_state_floats);
4974 /* create output projs & connect them */
4976 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4981 for (i = 0; i < out_size; ++i) {
4982 const expression_t *out_expr = out_exprs[i];
4984 ir_mode *mode = get_ir_mode(out_expr->base.type);
4985 ir_node *proj = new_Proj(node, mode, pn);
4986 ir_node *addr = out_addrs[i];
4988 set_value_for_expression_addr(out_expr, proj, addr);
4992 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
4993 statement_to_firm(statement->try_statement);
4994 warningf(&statement->base.source_position, "structured exception handling ignored");
4997 static void leave_statement_to_firm(leave_statement_t *statement) {
4998 errorf(&statement->base.source_position, "__leave not supported yet");
5002 * Transform a statement.
5004 static void statement_to_firm(statement_t *statement)
5007 assert(!statement->base.transformed);
5008 statement->base.transformed = true;
5011 switch (statement->kind) {
5012 case STATEMENT_INVALID:
5013 panic("invalid statement found");
5015 case STATEMENT_EMPTY:
5018 case STATEMENT_COMPOUND:
5019 compound_statement_to_firm(&statement->compound);
5021 case STATEMENT_RETURN:
5022 return_statement_to_firm(&statement->returns);
5024 case STATEMENT_EXPRESSION:
5025 expression_statement_to_firm(&statement->expression);
5028 if_statement_to_firm(&statement->ifs);
5030 case STATEMENT_WHILE:
5031 while_statement_to_firm(&statement->whiles);
5033 case STATEMENT_DO_WHILE:
5034 do_while_statement_to_firm(&statement->do_while);
5036 case STATEMENT_DECLARATION:
5037 declaration_statement_to_firm(&statement->declaration);
5039 case STATEMENT_BREAK:
5040 create_jump_statement(statement, get_break_label());
5042 case STATEMENT_CONTINUE:
5043 create_jump_statement(statement, continue_label);
5045 case STATEMENT_SWITCH:
5046 switch_statement_to_firm(&statement->switchs);
5048 case STATEMENT_CASE_LABEL:
5049 case_label_to_firm(&statement->case_label);
5052 for_statement_to_firm(&statement->fors);
5054 case STATEMENT_LABEL:
5055 label_to_firm(&statement->label);
5057 case STATEMENT_LOCAL_LABEL:
5058 /* local labels transform the semantics of labels while parsing
5059 * they don't need any special treatment here */
5061 case STATEMENT_GOTO:
5062 goto_to_firm(&statement->gotos);
5065 asm_statement_to_firm(&statement->asms);
5067 case STATEMENT_MS_TRY:
5068 ms_try_statement_to_firm(&statement->ms_try);
5070 case STATEMENT_LEAVE:
5071 leave_statement_to_firm(&statement->leave);
5074 panic("Statement not implemented\n");
5077 static int count_local_variables(const entity_t *entity,
5078 const entity_t *const end)
5081 for (; entity != end; entity = entity->base.next) {
5082 if (entity->kind != ENTITY_VARIABLE)
5084 type_t *type = skip_typeref(entity->declaration.type);
5086 if (!entity->variable.address_taken && is_type_scalar(type))
5092 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5094 int *const count = env;
5096 switch (stmt->kind) {
5097 case STATEMENT_DECLARATION: {
5098 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5099 *count += count_local_variables(decl_stmt->declarations_begin,
5100 decl_stmt->declarations_end->base.next);
5105 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5113 static int get_function_n_local_vars(entity_t *entity)
5117 /* count parameters */
5118 count += count_local_variables(entity->function.parameters.entities, NULL);
5120 /* count local variables declared in body */
5121 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5126 static void initialize_function_parameters(entity_t *entity)
5128 assert(entity->kind == ENTITY_FUNCTION);
5129 ir_graph *irg = current_ir_graph;
5130 ir_node *args = get_irg_args(irg);
5131 ir_node *start_block = get_irg_start_block(irg);
5132 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5135 entity_t *parameter = entity->function.parameters.entities;
5136 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5137 assert(parameter->kind == ENTITY_VARIABLE);
5138 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5139 type_t *type = skip_typeref(parameter->declaration.type);
5141 bool needs_entity = parameter->variable.address_taken;
5142 assert(!is_type_array(type));
5143 if (is_type_compound(type)) {
5144 needs_entity = true;
5148 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5149 ident *id = new_id_from_str(parameter->base.symbol->string);
5150 set_entity_ident(entity, id);
5152 parameter->declaration.kind
5153 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5154 parameter->variable.v.entity = entity;
5158 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5159 ir_mode *param_mode = get_type_mode(param_irtype);
5162 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5164 ir_mode *mode = get_ir_mode(type);
5165 value = create_conv(NULL, value, mode);
5166 value = do_strict_conv(NULL, value);
5168 parameter->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
5169 parameter->variable.v.value_number = next_value_number_function;
5170 set_irg_loc_description(current_ir_graph, next_value_number_function,
5171 (variable_t*) ¶meter->variable);
5172 ++next_value_number_function;
5174 set_value(parameter->variable.v.value_number, value);
5179 * Handle additional decl modifiers for IR-graphs
5181 * @param irg the IR-graph
5182 * @param dec_modifiers additional modifiers
5184 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5186 if (decl_modifiers & DM_NORETURN) {
5187 /* TRUE if the declaration includes the Microsoft
5188 __declspec(noreturn) specifier. */
5189 set_irg_additional_property(irg, mtp_property_noreturn);
5191 if (decl_modifiers & DM_NOTHROW) {
5192 /* TRUE if the declaration includes the Microsoft
5193 __declspec(nothrow) specifier. */
5194 set_irg_additional_property(irg, mtp_property_nothrow);
5196 if (decl_modifiers & DM_NAKED) {
5197 /* TRUE if the declaration includes the Microsoft
5198 __declspec(naked) specifier. */
5199 set_irg_additional_property(irg, mtp_property_naked);
5201 if (decl_modifiers & DM_FORCEINLINE) {
5202 /* TRUE if the declaration includes the
5203 Microsoft __forceinline specifier. */
5204 set_irg_inline_property(irg, irg_inline_forced);
5206 if (decl_modifiers & DM_NOINLINE) {
5207 /* TRUE if the declaration includes the Microsoft
5208 __declspec(noinline) specifier. */
5209 set_irg_inline_property(irg, irg_inline_forbidden);
5213 static void add_function_pointer(ir_type *segment, ir_entity *method,
5214 const char *unique_template)
5216 ir_type *method_type = get_entity_type(method);
5217 ident *id = id_unique(unique_template);
5218 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5220 ident *ide = id_unique(unique_template);
5221 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5222 ir_graph *irg = get_const_code_irg();
5223 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5226 set_entity_compiler_generated(ptr, 1);
5227 set_entity_variability(ptr, variability_constant);
5228 set_atomic_ent_value(ptr, val);
5232 * Generate possible IJmp branches to a given label block.
5234 static void gen_ijmp_branches(ir_node *block) {
5236 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5237 add_immBlock_pred(block, ijmp);
5242 * Create code for a function.
5244 static void create_function(entity_t *entity)
5246 assert(entity->kind == ENTITY_FUNCTION);
5247 ir_entity *function_entity = get_function_entity(entity);
5249 if (entity->function.statement == NULL)
5252 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5253 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5254 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5256 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5257 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5258 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5261 current_function_entity = entity;
5262 current_function_name = NULL;
5263 current_funcsig = NULL;
5265 assert(all_labels == NULL);
5266 all_labels = NEW_ARR_F(label_t *, 0);
5269 int n_local_vars = get_function_n_local_vars(entity);
5270 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5272 ir_graph *old_current_function = current_function;
5273 current_function = irg;
5275 set_irg_fp_model(irg, firm_opt.fp_model);
5276 tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5277 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5279 ir_node *first_block = get_cur_block();
5281 /* set inline flags */
5282 if (entity->function.is_inline)
5283 set_irg_inline_property(irg, irg_inline_recomended);
5284 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5286 next_value_number_function = 0;
5287 initialize_function_parameters(entity);
5289 statement_to_firm(entity->function.statement);
5291 ir_node *end_block = get_irg_end_block(irg);
5293 /* do we have a return statement yet? */
5294 if (get_cur_block() != NULL) {
5295 type_t *type = skip_typeref(entity->declaration.type);
5296 assert(is_type_function(type));
5297 const function_type_t *func_type = &type->function;
5298 const type_t *return_type
5299 = skip_typeref(func_type->return_type);
5302 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5303 ret = new_Return(get_store(), 0, NULL);
5306 if (is_type_scalar(return_type)) {
5307 mode = get_ir_mode(func_type->return_type);
5313 /* ยง5.1.2.2.3 main implicitly returns 0 */
5314 if (is_main(entity)) {
5315 in[0] = new_Const(mode, get_mode_null(mode));
5317 in[0] = new_Unknown(mode);
5319 ret = new_Return(get_store(), 1, in);
5321 add_immBlock_pred(end_block, ret);
5324 bool has_computed_gotos = false;
5325 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5326 label_t *label = all_labels[i];
5327 if (label->address_taken) {
5328 gen_ijmp_branches(label->block);
5329 has_computed_gotos = true;
5331 mature_immBlock(label->block);
5333 if (has_computed_gotos) {
5334 /* if we have computed goto's in the function, we cannot inline it */
5335 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5336 warningf(&entity->base.source_position,
5337 "function '%Y' can never be inlined because it contains a computed goto",
5338 entity->base.symbol);
5340 set_irg_inline_property(irg, irg_inline_forbidden);
5343 DEL_ARR_F(all_labels);
5346 mature_immBlock(first_block);
5347 mature_immBlock(end_block);
5349 irg_finalize_cons(irg);
5351 /* finalize the frame type */
5352 ir_type *frame_type = get_irg_frame_type(irg);
5353 int n = get_compound_n_members(frame_type);
5356 for (int i = 0; i < n; ++i) {
5357 ir_entity *entity = get_compound_member(frame_type, i);
5358 ir_type *entity_type = get_entity_type(entity);
5360 int align = get_type_alignment_bytes(entity_type);
5361 if (align > align_all)
5365 misalign = offset % align;
5367 offset += align - misalign;
5371 set_entity_offset(entity, offset);
5372 offset += get_type_size_bytes(entity_type);
5374 set_type_size_bytes(frame_type, offset);
5375 set_type_alignment_bytes(frame_type, align_all);
5378 current_function = old_current_function;
5380 /* create inner functions */
5382 for (inner = next_inner_function(); inner != NULL;
5383 inner = next_inner_function()) {
5384 create_function(inner);
5388 static void scope_to_firm(scope_t *scope)
5390 /* first pass: create declarations */
5391 entity_t *entity = scope->entities;
5392 for ( ; entity != NULL; entity = entity->base.next) {
5393 if (entity->base.symbol == NULL)
5396 if (entity->kind == ENTITY_FUNCTION) {
5397 get_function_entity(entity);
5398 } else if (entity->kind == ENTITY_VARIABLE) {
5399 create_global_variable(entity);
5403 /* second pass: create code/initializers */
5404 entity = scope->entities;
5405 for ( ; entity != NULL; entity = entity->base.next) {
5406 if (entity->base.symbol == NULL)
5409 if (entity->kind == ENTITY_FUNCTION) {
5410 create_function(entity);
5411 } else if (entity->kind == ENTITY_VARIABLE) {
5412 assert(entity->declaration.kind
5413 == DECLARATION_KIND_GLOBAL_VARIABLE);
5414 current_ir_graph = get_const_code_irg();
5415 create_variable_initializer(entity);
5420 void init_ast2firm(void)
5422 obstack_init(&asm_obst);
5423 init_atomic_modes();
5425 /* OS option must be set to the backend */
5426 switch (firm_opt.os_support) {
5427 case OS_SUPPORT_MINGW:
5428 create_ld_ident = create_name_win32;
5430 case OS_SUPPORT_LINUX:
5431 create_ld_ident = create_name_linux_elf;
5433 case OS_SUPPORT_MACHO:
5434 create_ld_ident = create_name_macho;
5437 panic("unexpected OS support mode");
5440 /* create idents for all known runtime functions */
5441 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5442 rts_idents[i] = new_id_from_str(rts_data[i].name);
5445 entitymap_init(&entitymap);
5448 static void init_ir_types(void)
5450 static int ir_types_initialized = 0;
5451 if (ir_types_initialized)
5453 ir_types_initialized = 1;
5455 ir_type_int = get_ir_type(type_int);
5456 ir_type_const_char = get_ir_type(type_const_char);
5457 ir_type_wchar_t = get_ir_type(type_wchar_t);
5458 ir_type_void = get_ir_type(type_void);
5461 void exit_ast2firm(void)
5463 entitymap_destroy(&entitymap);
5464 obstack_free(&asm_obst, NULL);
5467 static void global_asm_to_firm(statement_t *s)
5469 for (; s != NULL; s = s->base.next) {
5470 assert(s->kind == STATEMENT_ASM);
5472 char const *const text = s->asms.asm_text.begin;
5473 size_t size = s->asms.asm_text.size;
5475 /* skip the last \0 */
5476 if (text[size - 1] == '\0')
5479 ident *const id = new_id_from_chars(text, size);
5484 void translation_unit_to_firm(translation_unit_t *unit)
5486 /* just to be sure */
5487 continue_label = NULL;
5489 current_switch_cond = NULL;
5490 current_translation_unit = unit;
5493 inner_functions = NEW_ARR_F(entity_t *, 0);
5495 scope_to_firm(&unit->scope);
5496 global_asm_to_firm(unit->global_asm);
5498 DEL_ARR_F(inner_functions);
5499 inner_functions = NULL;
5501 current_ir_graph = NULL;
5502 current_translation_unit = NULL;