2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
41 #include "diagnostic.h"
42 #include "lang_features.h"
44 #include "type_hash.h"
46 #include "walk_statements.h"
48 #include "entitymap_t.h"
49 #include "driver/firm_opt.h"
50 #include "driver/firm_cmdline.h"
52 static ir_type *ir_type_const_char;
53 static ir_type *ir_type_wchar_t;
54 static ir_type *ir_type_void;
55 static ir_type *ir_type_int;
57 static int next_value_number_function;
58 static ir_node *continue_label;
59 static ir_node *break_label;
60 static ir_node *current_switch_cond;
61 static bool saw_default_label;
62 static label_t **all_labels;
63 static entity_t **inner_functions;
64 static ir_node *ijmp_list;
65 static bool constant_folding;
67 extern bool have_const_functions;
69 static const entity_t *current_function_entity;
70 static ir_node *current_function_name;
71 static ir_node *current_funcsig;
72 static switch_statement_t *current_switch;
73 static ir_graph *current_function;
74 static translation_unit_t *current_translation_unit;
76 static entitymap_t entitymap;
78 static struct obstack asm_obst;
80 typedef enum declaration_kind_t {
81 DECLARATION_KIND_UNKNOWN,
82 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
83 DECLARATION_KIND_GLOBAL_VARIABLE,
84 DECLARATION_KIND_LOCAL_VARIABLE,
85 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
86 DECLARATION_KIND_PARAMETER,
87 DECLARATION_KIND_PARAMETER_ENTITY,
88 DECLARATION_KIND_FUNCTION,
89 DECLARATION_KIND_COMPOUND_MEMBER,
90 DECLARATION_KIND_INNER_FUNCTION
93 static ir_mode *get_ir_mode(type_t *type);
94 static ir_type *get_ir_type_incomplete(type_t *type);
96 static void enqueue_inner_function(entity_t *entity)
98 ARR_APP1(entity_t*, inner_functions, entity);
101 static entity_t *next_inner_function(void)
103 int len = ARR_LEN(inner_functions);
107 entity_t *entity = inner_functions[len-1];
108 ARR_SHRINKLEN(inner_functions, len-1);
113 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
115 const entity_t *entity = get_irg_loc_description(irg, pos);
117 if (entity != NULL) {
118 warningf(&entity->base.source_position,
119 "%s '%#T' might be used uninitialized",
120 get_entity_kind_name(entity->kind),
121 entity->declaration.type, entity->base.symbol);
123 return new_r_Unknown(irg, mode);
126 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
128 const source_position_t *pos = (const source_position_t*) dbg;
131 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
135 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
137 const source_position_t *pos = (const source_position_t*) dbg;
142 return pos->input_name;
145 static dbg_info *get_dbg_info(const source_position_t *pos)
147 return (dbg_info*) pos;
150 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
152 static ir_mode *mode_int, *mode_uint;
154 static ir_node *_expression_to_firm(const expression_t *expression);
155 static ir_node *expression_to_firm(const expression_t *expression);
156 static void create_local_declaration(entity_t *entity);
158 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
160 unsigned flags = get_atomic_type_flags(kind);
161 unsigned size = get_atomic_type_size(kind);
162 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
163 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
166 unsigned bit_size = size * 8;
167 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
168 unsigned modulo_shift;
169 ir_mode_arithmetic arithmetic;
171 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
172 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
173 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
175 sort = irms_int_number;
176 arithmetic = irma_twos_complement;
177 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
179 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
180 snprintf(name, sizeof(name), "F%u", bit_size);
181 sort = irms_float_number;
182 arithmetic = irma_ieee754;
185 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
193 * Initialises the atomic modes depending on the machine size.
195 static void init_atomic_modes(void)
197 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
198 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
200 mode_int = atomic_modes[ATOMIC_TYPE_INT];
201 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
203 /* there's no real void type in firm */
204 atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
206 /* initialize pointer modes */
208 ir_mode_sort sort = irms_reference;
209 unsigned bit_size = machine_size;
211 ir_mode_arithmetic arithmetic = irma_twos_complement;
212 unsigned modulo_shift
213 = bit_size < machine_size ? machine_size : bit_size;
215 snprintf(name, sizeof(name), "p%u", machine_size);
216 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
219 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
220 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
222 /* Hmm, pointers should be machine size */
223 set_modeP_data(ptr_mode);
224 set_modeP_code(ptr_mode);
227 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
229 assert(kind <= ATOMIC_TYPE_LAST);
230 return atomic_modes[kind];
233 static unsigned get_compound_type_size(compound_type_t *type)
235 ir_type *irtype = get_ir_type((type_t*) type);
236 return get_type_size_bytes(irtype);
239 static unsigned get_array_type_size(array_type_t *type)
241 assert(!type->is_vla);
242 ir_type *irtype = get_ir_type((type_t*) type);
243 return get_type_size_bytes(irtype);
246 static unsigned get_type_size_const(type_t *type)
250 panic("error type occurred");
252 return get_atomic_type_size(type->atomic.akind);
254 return 2 * get_atomic_type_size(type->complex.akind);
256 return get_atomic_type_size(type->imaginary.akind);
258 return get_mode_size_bytes(mode_int);
259 case TYPE_COMPOUND_UNION:
260 case TYPE_COMPOUND_STRUCT:
261 return get_compound_type_size(&type->compound);
263 /* just a pointer to the function */
264 return get_mode_size_bytes(mode_P_code);
267 return get_mode_size_bytes(mode_P_data);
269 return get_array_type_size(&type->array);
271 return get_type_size_const(type->builtin.real_type);
273 panic("type size of bitfield request");
279 panic("Trying to determine size of invalid type");
282 static ir_node *get_type_size(type_t *type)
284 type = skip_typeref(type);
286 if (is_type_array(type) && type->array.is_vla) {
287 ir_node *size_node = type->array.size_node;
288 if (size_node == NULL) {
289 size_node = expression_to_firm(type->array.size_expression);
290 type->array.size_node = size_node;
293 ir_node *elem_size = get_type_size(type->array.element_type);
294 ir_mode *mode = get_irn_mode(size_node);
295 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
299 ir_mode *mode = get_ir_mode(type_size_t);
301 sym.type_p = get_ir_type(type);
302 return new_SymConst(mode, sym, symconst_type_size);
305 static unsigned count_parameters(const function_type_t *function_type)
309 function_parameter_t *parameter = function_type->parameters;
310 for ( ; parameter != NULL; parameter = parameter->next) {
318 * Creates a Firm type for an atomic type
320 static ir_type *create_atomic_type(const atomic_type_t *type)
322 atomic_type_kind_t kind = type->akind;
323 ir_mode *mode = atomic_modes[kind];
324 ident *id = get_mode_ident(mode);
325 ir_type *irtype = new_type_primitive(id, mode);
327 set_type_alignment_bytes(irtype, type->base.alignment);
333 * Creates a Firm type for a complex type
335 static ir_type *create_complex_type(const complex_type_t *type)
337 atomic_type_kind_t kind = type->akind;
338 ir_mode *mode = atomic_modes[kind];
339 ident *id = get_mode_ident(mode);
343 /* FIXME: finish the array */
348 * Creates a Firm type for an imaginary type
350 static ir_type *create_imaginary_type(const imaginary_type_t *type)
352 atomic_type_kind_t kind = type->akind;
353 ir_mode *mode = atomic_modes[kind];
354 ident *id = get_mode_ident(mode);
355 ir_type *irtype = new_type_primitive(id, mode);
357 set_type_alignment_bytes(irtype, type->base.alignment);
363 * return type of a parameter (and take transparent union gnu extension into
366 static type_t *get_parameter_type(type_t *type)
368 type = skip_typeref(type);
369 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
370 compound_t *compound = type->compound.compound;
371 type = compound->members.entities->declaration.type;
377 static ir_type *create_method_type(const function_type_t *function_type)
379 type_t *return_type = skip_typeref(function_type->return_type);
381 ident *id = id_unique("functiontype.%u");
382 int n_parameters = count_parameters(function_type);
383 int n_results = return_type == type_void ? 0 : 1;
384 ir_type *irtype = new_type_method(id, n_parameters, n_results);
386 if (return_type != type_void) {
387 ir_type *restype = get_ir_type(return_type);
388 set_method_res_type(irtype, 0, restype);
391 function_parameter_t *parameter = function_type->parameters;
393 for ( ; parameter != NULL; parameter = parameter->next) {
394 type_t *type = get_parameter_type(parameter->type);
395 ir_type *p_irtype = get_ir_type(type);
396 set_method_param_type(irtype, n, p_irtype);
400 if (function_type->variadic || function_type->unspecified_parameters) {
401 set_method_variadicity(irtype, variadicity_variadic);
404 unsigned cc = get_method_calling_convention(irtype);
405 switch (function_type->calling_convention) {
406 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
409 set_method_calling_convention(irtype, SET_CDECL(cc));
413 if (function_type->variadic || function_type->unspecified_parameters)
416 /* only non-variadic function can use stdcall, else use cdecl */
417 set_method_calling_convention(irtype, SET_STDCALL(cc));
421 if (function_type->variadic || function_type->unspecified_parameters)
423 /* only non-variadic function can use fastcall, else use cdecl */
424 set_method_calling_convention(irtype, SET_FASTCALL(cc));
428 /* Hmm, leave default, not accepted by the parser yet. */
435 static ir_type *create_pointer_type(pointer_type_t *type)
437 type_t *points_to = type->points_to;
438 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
439 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
440 ir_points_to, mode_P_data);
445 static ir_type *create_reference_type(reference_type_t *type)
447 type_t *refers_to = type->refers_to;
448 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
449 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
450 ir_refers_to, mode_P_data);
455 static ir_type *create_array_type(array_type_t *type)
457 type_t *element_type = type->element_type;
458 ir_type *ir_element_type = get_ir_type(element_type);
460 ident *id = id_unique("array.%u");
461 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
463 const int align = get_type_alignment_bytes(ir_element_type);
464 set_type_alignment_bytes(ir_type, align);
466 if (type->size_constant) {
467 int n_elements = type->size;
469 set_array_bounds_int(ir_type, 0, 0, n_elements);
471 size_t elemsize = get_type_size_bytes(ir_element_type);
472 if (elemsize % align > 0) {
473 elemsize += align - (elemsize % align);
475 set_type_size_bytes(ir_type, n_elements * elemsize);
477 set_array_lower_bound_int(ir_type, 0, 0);
479 set_type_state(ir_type, layout_fixed);
485 * Return the signed integer type of size bits.
487 * @param size the size
489 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
492 static ir_mode *s_modes[64 + 1] = {NULL, };
496 if (size <= 0 || size > 64)
499 mode = s_modes[size];
503 snprintf(name, sizeof(name), "bf_I%u", size);
504 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
505 size <= 32 ? 32 : size );
506 s_modes[size] = mode;
510 snprintf(name, sizeof(name), "I%u", size);
511 ident *id = new_id_from_str(name);
512 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
513 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
514 set_primitive_base_type(res, base_tp);
520 * Return the unsigned integer type of size bits.
522 * @param size the size
524 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
527 static ir_mode *u_modes[64 + 1] = {NULL, };
531 if (size <= 0 || size > 64)
534 mode = u_modes[size];
538 snprintf(name, sizeof(name), "bf_U%u", size);
539 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
540 size <= 32 ? 32 : size );
541 u_modes[size] = mode;
546 snprintf(name, sizeof(name), "U%u", size);
547 ident *id = new_id_from_str(name);
548 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
549 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
550 set_primitive_base_type(res, base_tp);
555 static ir_type *create_bitfield_type(bitfield_type_t *const type)
557 type_t *base = skip_typeref(type->base_type);
558 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
559 ir_type *irbase = get_ir_type(base);
561 unsigned size = type->bit_size;
563 assert(!is_type_float(base));
564 if (is_type_signed(base)) {
565 return get_signed_int_type_for_bit_size(irbase, size);
567 return get_unsigned_int_type_for_bit_size(irbase, size);
571 #define INVALID_TYPE ((ir_type_ptr)-1)
574 COMPOUND_IS_STRUCT = false,
575 COMPOUND_IS_UNION = true
579 * Construct firm type from ast struct type.
581 * As anonymous inner structs get flattened to a single firm type, we might get
582 * irtype, outer_offset and out_align passed (they represent the position of
583 * the anonymous inner struct inside the resulting firm struct)
585 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
586 size_t *outer_offset, size_t *outer_align,
587 bool incomplete, bool is_union)
589 compound_t *compound = type->compound;
591 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
592 return compound->irtype;
595 size_t align_all = 1;
597 size_t bit_offset = 0;
600 if (irtype == NULL) {
601 symbol_t *symbol = compound->base.symbol;
603 if (symbol != NULL) {
604 id = new_id_from_str(symbol->string);
607 id = id_unique("__anonymous_union.%u");
609 id = id_unique("__anonymous_struct.%u");
612 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
615 irtype = new_d_type_union(id, dbgi);
617 irtype = new_d_type_struct(id, dbgi);
620 compound->irtype_complete = false;
621 compound->irtype = irtype;
623 offset = *outer_offset;
624 align_all = *outer_align;
630 compound->irtype_complete = true;
632 entity_t *entry = compound->members.entities;
633 for ( ; entry != NULL; entry = entry->base.next) {
634 if (entry->kind != ENTITY_COMPOUND_MEMBER)
637 size_t prev_offset = offset;
639 symbol_t *symbol = entry->base.symbol;
640 type_t *entry_type = skip_typeref(entry->declaration.type);
641 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
644 if (symbol != NULL) {
645 ident = new_id_from_str(symbol->string);
647 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
648 create_compound_type(&entry_type->compound, irtype, &offset,
649 &align_all, false, COMPOUND_IS_STRUCT);
650 goto finished_member;
651 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
652 create_compound_type(&entry_type->compound, irtype, &offset,
653 &align_all, false, COMPOUND_IS_UNION);
654 goto finished_member;
656 assert(entry_type->kind == TYPE_BITFIELD);
658 ident = id_unique("anon.%u");
661 ir_type *base_irtype;
662 if (entry_type->kind == TYPE_BITFIELD) {
663 base_irtype = get_ir_type(entry_type->bitfield.base_type);
665 base_irtype = get_ir_type(entry_type);
668 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
669 size_t misalign = offset % entry_alignment;
671 ir_type *entry_irtype = get_ir_type(entry_type);
672 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
675 size_t bits_remainder;
676 if (entry_type->kind == TYPE_BITFIELD) {
677 size_t size_bits = entry_type->bitfield.bit_size;
678 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
680 if (size_bits > rest_size_bits) {
681 /* start a new bucket */
682 offset += entry_alignment - misalign;
688 /* put into current bucket */
689 base = offset - misalign;
690 bits_remainder = misalign * 8 + bit_offset;
693 offset += size_bits / 8;
694 bit_offset = bit_offset + (size_bits % 8);
696 size_t entry_size = get_type_size_bytes(base_irtype);
697 if (misalign > 0 || bit_offset > 0)
698 offset += entry_alignment - misalign;
702 offset += entry_size;
706 if (entry_alignment > align_all) {
707 if (entry_alignment % align_all != 0) {
708 panic("uneven alignments not supported yet");
710 align_all = entry_alignment;
713 set_entity_offset(entity, base);
714 set_entity_offset_bits_remainder(entity,
715 (unsigned char) bits_remainder);
716 //add_struct_member(irtype, entity);
717 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
718 assert(entry->compound_member.entity == NULL);
719 entry->compound_member.entity = entity;
723 size_t entry_size = offset - prev_offset;
724 if (entry_size > size) {
736 size_t misalign = offset % align_all;
737 if (misalign > 0 || bit_offset > 0) {
738 size += align_all - misalign;
741 if (outer_offset != NULL) {
743 *outer_offset = offset;
745 *outer_offset += size;
748 if (align_all > *outer_align) {
749 if (align_all % *outer_align != 0) {
750 panic("uneven alignments not supported yet");
752 *outer_align = align_all;
755 set_type_alignment_bytes(irtype, align_all);
756 set_type_size_bytes(irtype, size);
757 set_type_state(irtype, layout_fixed);
763 static ir_type *create_enum_type(enum_type_t *const type)
765 type->base.firm_type = ir_type_int;
767 ir_mode *const mode = mode_int;
768 tarval *const one = get_mode_one(mode);
769 tarval * tv_next = get_tarval_null(mode);
771 bool constant_folding_old = constant_folding;
772 constant_folding = true;
774 enum_t *enume = type->enume;
775 entity_t *entry = enume->base.next;
776 for (; entry != NULL; entry = entry->base.next) {
777 if (entry->kind != ENTITY_ENUM_VALUE)
780 expression_t *const init = entry->enum_value.value;
782 ir_node *const cnst = expression_to_firm(init);
783 if (!is_Const(cnst)) {
784 panic("couldn't fold constant");
786 tv_next = get_Const_tarval(cnst);
788 entry->enum_value.tv = tv_next;
789 tv_next = tarval_add(tv_next, one);
792 constant_folding = constant_folding_old;
797 static ir_type *get_ir_type_incomplete(type_t *type)
799 assert(type != NULL);
800 type = skip_typeref(type);
802 if (type->base.firm_type != NULL) {
803 assert(type->base.firm_type != INVALID_TYPE);
804 return type->base.firm_type;
807 switch (type->kind) {
808 case TYPE_COMPOUND_STRUCT:
809 return create_compound_type(&type->compound, NULL, NULL, NULL,
810 true, COMPOUND_IS_STRUCT);
811 case TYPE_COMPOUND_UNION:
812 return create_compound_type(&type->compound, NULL, NULL, NULL,
813 true, COMPOUND_IS_UNION);
815 return get_ir_type(type);
819 ir_type *get_ir_type(type_t *type)
821 assert(type != NULL);
823 type = skip_typeref(type);
825 if (type->base.firm_type != NULL) {
826 assert(type->base.firm_type != INVALID_TYPE);
827 return type->base.firm_type;
830 ir_type *firm_type = NULL;
831 switch (type->kind) {
833 /* Happens while constant folding, when there was an error */
834 return create_atomic_type(&type_void->atomic);
837 firm_type = create_atomic_type(&type->atomic);
840 firm_type = create_complex_type(&type->complex);
843 firm_type = create_imaginary_type(&type->imaginary);
846 firm_type = create_method_type(&type->function);
849 firm_type = create_pointer_type(&type->pointer);
852 firm_type = create_reference_type(&type->reference);
855 firm_type = create_array_type(&type->array);
857 case TYPE_COMPOUND_STRUCT:
858 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
859 false, COMPOUND_IS_STRUCT);
861 case TYPE_COMPOUND_UNION:
862 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
863 false, COMPOUND_IS_UNION);
866 firm_type = create_enum_type(&type->enumt);
869 firm_type = get_ir_type(type->builtin.real_type);
872 firm_type = create_bitfield_type(&type->bitfield);
880 if (firm_type == NULL)
881 panic("unknown type found");
883 type->base.firm_type = firm_type;
887 ir_mode *get_ir_mode(type_t *type)
889 ir_type *irtype = get_ir_type(type);
891 /* firm doesn't report a mode for arrays somehow... */
892 if (is_Array_type(irtype)) {
896 ir_mode *mode = get_type_mode(irtype);
897 assert(mode != NULL);
901 /** Names of the runtime functions. */
902 static const struct {
903 int id; /**< the rts id */
904 int n_res; /**< number of return values */
905 const char *name; /**< the name of the rts function */
906 int n_params; /**< number of parameters */
907 unsigned flags; /**< language flags */
909 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
910 { rts_abort, 0, "abort", 0, _C89 },
911 { rts_alloca, 1, "alloca", 1, _ALL },
912 { rts_abs, 1, "abs", 1, _C89 },
913 { rts_labs, 1, "labs", 1, _C89 },
914 { rts_llabs, 1, "llabs", 1, _C99 },
915 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
917 { rts_fabs, 1, "fabs", 1, _C89 },
918 { rts_sqrt, 1, "sqrt", 1, _C89 },
919 { rts_cbrt, 1, "cbrt", 1, _C99 },
920 { rts_exp, 1, "exp", 1, _C89 },
921 { rts_exp2, 1, "exp2", 1, _C89 },
922 { rts_exp10, 1, "exp10", 1, _GNUC },
923 { rts_log, 1, "log", 1, _C89 },
924 { rts_log2, 1, "log2", 1, _C89 },
925 { rts_log10, 1, "log10", 1, _C89 },
926 { rts_pow, 1, "pow", 2, _C89 },
927 { rts_sin, 1, "sin", 1, _C89 },
928 { rts_cos, 1, "cos", 1, _C89 },
929 { rts_tan, 1, "tan", 1, _C89 },
930 { rts_asin, 1, "asin", 1, _C89 },
931 { rts_acos, 1, "acos", 1, _C89 },
932 { rts_atan, 1, "atan", 1, _C89 },
933 { rts_sinh, 1, "sinh", 1, _C89 },
934 { rts_cosh, 1, "cosh", 1, _C89 },
935 { rts_tanh, 1, "tanh", 1, _C89 },
937 { rts_fabsf, 1, "fabsf", 1, _C99 },
938 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
939 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
940 { rts_expf, 1, "expf", 1, _C99 },
941 { rts_exp2f, 1, "exp2f", 1, _C99 },
942 { rts_exp10f, 1, "exp10f", 1, _GNUC },
943 { rts_logf, 1, "logf", 1, _C99 },
944 { rts_log2f, 1, "log2f", 1, _C99 },
945 { rts_log10f, 1, "log10f", 1, _C99 },
946 { rts_powf, 1, "powf", 2, _C99 },
947 { rts_sinf, 1, "sinf", 1, _C99 },
948 { rts_cosf, 1, "cosf", 1, _C99 },
949 { rts_tanf, 1, "tanf", 1, _C99 },
950 { rts_asinf, 1, "asinf", 1, _C99 },
951 { rts_acosf, 1, "acosf", 1, _C99 },
952 { rts_atanf, 1, "atanf", 1, _C99 },
953 { rts_sinhf, 1, "sinhf", 1, _C99 },
954 { rts_coshf, 1, "coshf", 1, _C99 },
955 { rts_tanhf, 1, "tanhf", 1, _C99 },
957 { rts_fabsl, 1, "fabsl", 1, _C99 },
958 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
959 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
960 { rts_expl, 1, "expl", 1, _C99 },
961 { rts_exp2l, 1, "exp2l", 1, _C99 },
962 { rts_exp10l, 1, "exp10l", 1, _GNUC },
963 { rts_logl, 1, "logl", 1, _C99 },
964 { rts_log2l, 1, "log2l", 1, _C99 },
965 { rts_log10l, 1, "log10l", 1, _C99 },
966 { rts_powl, 1, "powl", 2, _C99 },
967 { rts_sinl, 1, "sinl", 1, _C99 },
968 { rts_cosl, 1, "cosl", 1, _C99 },
969 { rts_tanl, 1, "tanl", 1, _C99 },
970 { rts_asinl, 1, "asinl", 1, _C99 },
971 { rts_acosl, 1, "acosl", 1, _C99 },
972 { rts_atanl, 1, "atanl", 1, _C99 },
973 { rts_sinhl, 1, "sinhl", 1, _C99 },
974 { rts_coshl, 1, "coshl", 1, _C99 },
975 { rts_tanhl, 1, "tanhl", 1, _C99 },
977 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
978 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
979 { rts_strcmp, 1, "strcmp", 2, _C89 },
980 { rts_strncmp, 1, "strncmp", 3, _C89 }
983 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
985 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
988 * Handle GNU attributes for entities
990 * @param ent the entity
991 * @param decl the routine declaration
993 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
995 assert(is_declaration(entity));
996 decl_modifiers_t modifiers = entity->declaration.modifiers;
997 if (modifiers & DM_PURE) {
998 /* TRUE if the declaration includes the GNU
999 __attribute__((pure)) specifier. */
1000 set_entity_additional_property(irentity, mtp_property_pure);
1002 if (modifiers & DM_CONST) {
1003 set_entity_additional_property(irentity, mtp_property_const);
1004 have_const_functions = true;
1006 if (modifiers & DM_USED) {
1007 /* TRUE if the declaration includes the GNU
1008 __attribute__((used)) specifier. */
1009 set_entity_stickyness(irentity, stickyness_sticky);
1013 static bool is_main(entity_t *entity)
1015 static symbol_t *sym_main = NULL;
1016 if (sym_main == NULL) {
1017 sym_main = symbol_table_insert("main");
1020 if (entity->base.symbol != sym_main)
1022 /* must be in outermost scope */
1023 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1030 * Creates an entity representing a function.
1032 * @param declaration the function declaration
1034 static ir_entity *get_function_entity(entity_t *entity)
1036 assert(entity->kind == ENTITY_FUNCTION);
1037 if (entity->function.entity != NULL) {
1038 return entity->function.entity;
1041 if (is_main(entity)) {
1042 /* force main to C linkage */
1043 type_t *type = entity->declaration.type;
1044 assert(is_type_function(type));
1045 if (type->function.linkage != LINKAGE_C) {
1046 type_t *new_type = duplicate_type(type);
1047 new_type->function.linkage = LINKAGE_C;
1049 type = typehash_insert(new_type);
1050 if (type != new_type) {
1051 obstack_free(type_obst, new_type);
1053 entity->declaration.type = type;
1057 symbol_t *symbol = entity->base.symbol;
1058 ident *id = new_id_from_str(symbol->string);
1060 ir_type *global_type = get_glob_type();
1061 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1062 bool const has_body = entity->function.statement != NULL;
1064 /* already an entity defined? */
1065 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1066 if (irentity != NULL) {
1067 if (get_entity_visibility(irentity) == visibility_external_allocated
1069 set_entity_visibility(irentity, visibility_external_visible);
1071 goto entity_created;
1074 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1075 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1076 set_entity_ld_ident(irentity, create_ld_ident(entity));
1078 handle_gnu_attributes_ent(irentity, entity);
1080 /* static inline => local
1081 * extern inline => local
1082 * inline without definition => local
1083 * inline with definition => external_visible */
1084 storage_class_tag_t const storage_class
1085 = (storage_class_tag_t) entity->declaration.storage_class;
1086 bool const is_inline = entity->function.is_inline;
1087 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1088 set_entity_visibility(irentity, visibility_external_visible);
1089 } else if (storage_class == STORAGE_CLASS_STATIC ||
1090 (is_inline && has_body)) {
1092 /* this entity was declared, but is defined nowhere */
1093 set_entity_peculiarity(irentity, peculiarity_description);
1095 set_entity_visibility(irentity, visibility_local);
1096 } else if (has_body) {
1097 set_entity_visibility(irentity, visibility_external_visible);
1099 set_entity_visibility(irentity, visibility_external_allocated);
1101 set_entity_allocation(irentity, allocation_static);
1103 /* We should check for file scope here, but as long as we compile C only
1104 this is not needed. */
1105 if (! firm_opt.freestanding) {
1106 /* check for a known runtime function */
1107 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1108 if (id != rts_idents[i])
1111 /* ignore those rts functions not necessary needed for current mode */
1112 if ((c_mode & rts_data[i].flags) == 0)
1114 assert(rts_entities[rts_data[i].id] == NULL);
1115 rts_entities[rts_data[i].id] = irentity;
1119 entitymap_insert(&entitymap, symbol, irentity);
1122 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1123 entity->function.entity = irentity;
1129 * Creates a Const node representing a constant.
1131 static ir_node *const_to_firm(const const_expression_t *cnst)
1133 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1134 ir_mode *mode = get_ir_mode(cnst->base.type);
1139 if (mode_is_float(mode)) {
1140 tv = new_tarval_from_double(cnst->v.float_value, mode);
1142 if (mode_is_signed(mode)) {
1143 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1145 len = snprintf(buf, sizeof(buf), "%llu",
1146 (unsigned long long) cnst->v.int_value);
1148 tv = new_tarval_from_str(buf, len, mode);
1151 return new_d_Const(dbgi, tv);
1155 * Creates a Const node representing a character constant.
1157 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1159 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1160 ir_mode *mode = get_ir_mode(cnst->base.type);
1162 long long int v = 0;
1163 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1164 if (char_is_signed) {
1165 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1167 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
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, tv);
1178 * Creates a Const node representing a wide character constant.
1180 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1182 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1183 ir_mode *mode = get_ir_mode(cnst->base.type);
1185 long long int v = cnst->v.wide_character.begin[0];
1188 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1189 tarval *tv = new_tarval_from_str(buf, len, mode);
1191 return new_d_Const(dbgi, tv);
1195 * Creates a SymConst for a given entity.
1197 * @param dbgi debug info
1198 * @param mode the (reference) mode for the SymConst
1199 * @param entity the entity
1201 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1204 assert(entity != NULL);
1205 union symconst_symbol sym;
1206 sym.entity_p = entity;
1207 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1211 * Creates a SymConst node representing a string constant.
1213 * @param src_pos the source position of the string constant
1214 * @param id_prefix a prefix for the name of the generated string constant
1215 * @param value the value of the string constant
1217 static ir_node *string_to_firm(const source_position_t *const src_pos,
1218 const char *const id_prefix,
1219 const string_t *const value)
1221 ir_type *const global_type = get_glob_type();
1222 dbg_info *const dbgi = get_dbg_info(src_pos);
1223 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1224 ir_type_const_char, dbgi);
1226 ident *const id = id_unique(id_prefix);
1227 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1228 set_entity_ld_ident(entity, id);
1229 set_entity_variability(entity, variability_constant);
1230 set_entity_allocation(entity, allocation_static);
1232 ir_type *const elem_type = ir_type_const_char;
1233 ir_mode *const mode = get_type_mode(elem_type);
1235 const char* const string = value->begin;
1236 const size_t slen = value->size;
1238 set_array_lower_bound_int(type, 0, 0);
1239 set_array_upper_bound_int(type, 0, slen);
1240 set_type_size_bytes(type, slen);
1241 set_type_state(type, layout_fixed);
1243 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1244 for (size_t i = 0; i < slen; ++i) {
1245 tvs[i] = new_tarval_from_long(string[i], mode);
1248 set_array_entity_values(entity, tvs, slen);
1251 return create_symconst(dbgi, mode_P_data, entity);
1255 * Creates a SymConst node representing a string literal.
1257 * @param literal the string literal
1259 static ir_node *string_literal_to_firm(
1260 const string_literal_expression_t* literal)
1262 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1267 * Creates a SymConst node representing a wide string literal.
1269 * @param literal the wide string literal
1271 static ir_node *wide_string_literal_to_firm(
1272 const wide_string_literal_expression_t* const literal)
1274 ir_type *const global_type = get_glob_type();
1275 ir_type *const elem_type = ir_type_wchar_t;
1276 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1277 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1280 ident *const id = id_unique("Lstr.%u");
1281 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1282 set_entity_ld_ident(entity, id);
1283 set_entity_variability(entity, variability_constant);
1284 set_entity_allocation(entity, allocation_static);
1286 ir_mode *const mode = get_type_mode(elem_type);
1288 const wchar_rep_t *const string = literal->value.begin;
1289 const size_t slen = literal->value.size;
1291 set_array_lower_bound_int(type, 0, 0);
1292 set_array_upper_bound_int(type, 0, slen);
1293 set_type_size_bytes(type, slen);
1294 set_type_state(type, layout_fixed);
1296 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1297 for (size_t i = 0; i < slen; ++i) {
1298 tvs[i] = new_tarval_from_long(string[i], mode);
1301 set_array_entity_values(entity, tvs, slen);
1304 return create_symconst(dbgi, mode_P_data, entity);
1307 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1308 ir_node *const addr)
1310 ir_type *irtype = get_ir_type(type);
1311 if (is_compound_type(irtype)
1312 || is_Method_type(irtype)
1313 || is_Array_type(irtype)) {
1317 ir_mode *const mode = get_type_mode(irtype);
1318 ir_node *const memory = get_store();
1319 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1320 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1321 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1323 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1324 set_Load_volatility(load, volatility_is_volatile);
1327 set_store(load_mem);
1332 * Creates a strict Conv if neccessary.
1334 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1336 ir_mode *mode = get_irn_mode(node);
1338 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1340 if (!mode_is_float(mode))
1343 /* check if there is already a Conv */
1344 if (is_Conv(node)) {
1345 /* convert it into a strict Conv */
1346 set_Conv_strict(node, 1);
1350 /* otherwise create a new one */
1351 return new_d_strictConv(dbgi, node, mode);
1354 static ir_node *get_global_var_address(dbg_info *const dbgi,
1355 const entity_t *const entity)
1357 assert(entity->kind == ENTITY_VARIABLE);
1358 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1360 ir_entity *const irentity = entity->variable.v.entity;
1361 if (entity->variable.thread_local) {
1362 ir_node *const no_mem = new_NoMem();
1363 ir_node *const tls = get_irg_tls(current_ir_graph);
1364 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1366 return create_symconst(dbgi, mode_P_data, irentity);
1371 * Returns the correct base address depending on whether it is a parameter or a
1372 * normal local variable.
1374 static ir_node *get_local_frame(ir_entity *const ent)
1376 ir_graph *const irg = current_ir_graph;
1377 const ir_type *const owner = get_entity_owner(ent);
1378 if (owner == get_irg_frame_type(irg)) {
1379 return get_irg_frame(irg);
1381 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1382 return get_irg_value_param_base(irg);
1386 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1388 ir_mode *value_mode = get_irn_mode(value);
1390 if (value_mode == dest_mode || is_Bad(value))
1393 if (dest_mode == mode_b) {
1394 ir_node *zero = new_Const(get_mode_null(value_mode));
1395 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1396 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1400 return new_d_Conv(dbgi, value, dest_mode);
1404 * Keep all memory edges of the given block.
1406 static void keep_all_memory(ir_node *block) {
1407 ir_node *old = get_cur_block();
1409 set_cur_block(block);
1410 keep_alive(get_store());
1411 /* TODO: keep all memory edges from restricted pointers */
1415 static ir_node *reference_expression_enum_value_to_firm(
1416 const reference_expression_t *ref)
1418 entity_t *entity = ref->entity;
1419 type_t *type = skip_typeref(entity->enum_value.enum_type);
1420 /* make sure the type is constructed */
1421 (void) get_ir_type(type);
1423 return new_Const(entity->enum_value.tv);
1426 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1428 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1429 entity_t *entity = ref->entity;
1430 assert(is_declaration(entity));
1431 type_t *type = skip_typeref(entity->declaration.type);
1433 /* make sure the type is constructed */
1434 (void) get_ir_type(type);
1436 switch ((declaration_kind_t) entity->declaration.kind) {
1437 case DECLARATION_KIND_UNKNOWN:
1440 case DECLARATION_KIND_LOCAL_VARIABLE: {
1441 ir_mode *const mode = get_ir_mode(type);
1442 return get_value(entity->variable.v.value_number, mode);
1444 case DECLARATION_KIND_PARAMETER: {
1445 ir_mode *const mode = get_ir_mode(type);
1446 return get_value(entity->parameter.v.value_number, mode);
1448 case DECLARATION_KIND_FUNCTION: {
1449 ir_mode *const mode = get_ir_mode(type);
1450 return create_symconst(dbgi, mode, entity->function.entity);
1452 case DECLARATION_KIND_INNER_FUNCTION: {
1453 ir_mode *const mode = get_ir_mode(type);
1454 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1455 /* inner function not using the closure */
1456 return create_symconst(dbgi, mode, entity->function.entity);
1458 /* TODO: need trampoline here */
1459 panic("Trampoline code not implemented");
1460 return create_symconst(dbgi, mode, entity->function.entity);
1463 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1464 ir_node *const addr = get_global_var_address(dbgi, entity);
1465 return deref_address(dbgi, entity->declaration.type, addr);
1468 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1469 ir_entity *irentity = entity->variable.v.entity;
1470 ir_node *frame = get_local_frame(irentity);
1471 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1472 return deref_address(dbgi, entity->declaration.type, sel);
1474 case DECLARATION_KIND_PARAMETER_ENTITY: {
1475 ir_entity *irentity = entity->parameter.v.entity;
1476 ir_node *frame = get_local_frame(irentity);
1477 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1478 return deref_address(dbgi, entity->declaration.type, sel);
1481 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1482 return entity->variable.v.vla_base;
1484 case DECLARATION_KIND_COMPOUND_MEMBER:
1485 panic("not implemented reference type");
1488 panic("reference to declaration with unknown type found");
1491 static ir_node *reference_addr(const reference_expression_t *ref)
1493 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1494 entity_t *entity = ref->entity;
1495 assert(is_declaration(entity));
1497 switch((declaration_kind_t) entity->declaration.kind) {
1498 case DECLARATION_KIND_UNKNOWN:
1500 case DECLARATION_KIND_PARAMETER:
1501 case DECLARATION_KIND_LOCAL_VARIABLE:
1502 /* you can store to a local variable (so we don't panic but return NULL
1503 * as an indicator for no real address) */
1505 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1506 ir_node *const addr = get_global_var_address(dbgi, entity);
1509 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1510 ir_entity *irentity = entity->variable.v.entity;
1511 ir_node *frame = get_local_frame(irentity);
1512 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1516 case DECLARATION_KIND_PARAMETER_ENTITY: {
1517 ir_entity *irentity = entity->parameter.v.entity;
1518 ir_node *frame = get_local_frame(irentity);
1519 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1525 return entity->variable.v.vla_base;
1527 case DECLARATION_KIND_FUNCTION: {
1528 type_t *const type = skip_typeref(entity->declaration.type);
1529 ir_mode *const mode = get_ir_mode(type);
1530 return create_symconst(dbgi, mode, entity->function.entity);
1533 case DECLARATION_KIND_INNER_FUNCTION:
1534 case DECLARATION_KIND_COMPOUND_MEMBER:
1535 panic("not implemented reference type");
1538 panic("reference to declaration with unknown type found");
1542 * Transform calls to builtin functions.
1544 static ir_node *process_builtin_call(const call_expression_t *call)
1546 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1548 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1549 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1551 type_t *type = skip_typeref(builtin->base.type);
1552 assert(is_type_pointer(type));
1554 type_t *function_type = skip_typeref(type->pointer.points_to);
1555 symbol_t *symbol = builtin->symbol;
1557 switch(symbol->ID) {
1558 case T___builtin_alloca: {
1559 if (call->arguments == NULL || call->arguments->next != NULL) {
1560 panic("invalid number of parameters on __builtin_alloca");
1562 expression_t *argument = call->arguments->expression;
1563 ir_node *size = expression_to_firm(argument);
1565 ir_node *store = get_store();
1566 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1568 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1570 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1575 case T___builtin_huge_val:
1576 case T___builtin_inf:
1577 case T___builtin_inff:
1578 case T___builtin_infl: {
1579 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1580 tarval *tv = get_mode_infinite(mode);
1581 ir_node *res = new_d_Const(dbgi, tv);
1584 case T___builtin_nan:
1585 case T___builtin_nanf:
1586 case T___builtin_nanl: {
1587 /* Ignore string for now... */
1588 assert(is_type_function(function_type));
1589 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1590 tarval *tv = get_mode_NAN(mode);
1591 ir_node *res = new_d_Const(dbgi, tv);
1594 case T___builtin_expect: {
1595 expression_t *argument = call->arguments->expression;
1596 return _expression_to_firm(argument);
1598 case T___builtin_va_end:
1601 panic("Unsupported builtin found\n");
1606 * Transform a call expression.
1607 * Handles some special cases, like alloca() calls, which must be resolved
1608 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1609 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1612 static ir_node *call_expression_to_firm(const call_expression_t *call)
1614 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1615 assert(get_cur_block() != NULL);
1617 expression_t *function = call->function;
1618 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1619 return process_builtin_call(call);
1621 if (function->kind == EXPR_REFERENCE) {
1622 const reference_expression_t *ref = &function->reference;
1623 entity_t *entity = ref->entity;
1625 if (entity->kind == ENTITY_FUNCTION
1626 && entity->function.entity == rts_entities[rts_alloca]) {
1627 /* handle alloca() call */
1628 expression_t *argument = call->arguments->expression;
1629 ir_node *size = expression_to_firm(argument);
1631 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1633 ir_node *store = get_store();
1634 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1635 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1637 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1639 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1644 ir_node *callee = expression_to_firm(function);
1646 type_t *type = skip_typeref(function->base.type);
1647 assert(is_type_pointer(type));
1648 pointer_type_t *pointer_type = &type->pointer;
1649 type_t *points_to = skip_typeref(pointer_type->points_to);
1650 assert(is_type_function(points_to));
1651 function_type_t *function_type = &points_to->function;
1653 int n_parameters = 0;
1654 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1655 ir_type *new_method_type = NULL;
1656 if (function_type->variadic || function_type->unspecified_parameters) {
1657 const call_argument_t *argument = call->arguments;
1658 for ( ; argument != NULL; argument = argument->next) {
1662 /* we need to construct a new method type matching the call
1664 int n_res = get_method_n_ress(ir_method_type);
1665 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1666 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1667 n_parameters, n_res, dbgi);
1668 set_method_calling_convention(new_method_type,
1669 get_method_calling_convention(ir_method_type));
1670 set_method_additional_properties(new_method_type,
1671 get_method_additional_properties(ir_method_type));
1672 set_method_variadicity(new_method_type,
1673 get_method_variadicity(ir_method_type));
1675 for (int i = 0; i < n_res; ++i) {
1676 set_method_res_type(new_method_type, i,
1677 get_method_res_type(ir_method_type, i));
1679 argument = call->arguments;
1680 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1681 expression_t *expression = argument->expression;
1682 ir_type *irtype = get_ir_type(expression->base.type);
1683 set_method_param_type(new_method_type, i, irtype);
1685 ir_method_type = new_method_type;
1687 n_parameters = get_method_n_params(ir_method_type);
1690 ir_node *in[n_parameters];
1692 const call_argument_t *argument = call->arguments;
1693 for (int n = 0; n < n_parameters; ++n) {
1694 expression_t *expression = argument->expression;
1695 ir_node *arg_node = expression_to_firm(expression);
1697 arg_node = do_strict_conv(dbgi, arg_node);
1701 argument = argument->next;
1704 ir_node *store = get_store();
1705 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1707 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1710 type_t *return_type = skip_typeref(function_type->return_type);
1711 ir_node *result = NULL;
1713 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1715 if (is_type_scalar(return_type)) {
1716 mode = get_ir_mode(return_type);
1720 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1721 result = new_d_Proj(dbgi, resproj, mode, 0);
1724 if (function->kind == EXPR_REFERENCE &&
1725 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1726 /* A dead end: Keep the Call and the Block. Also place all further
1727 * nodes into a new and unreachable block. */
1729 keep_alive(get_cur_block());
1736 static void statement_to_firm(statement_t *statement);
1737 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1739 static ir_node *expression_to_addr(const expression_t *expression);
1740 static ir_node *create_condition_evaluation(const expression_t *expression,
1741 ir_node *true_block,
1742 ir_node *false_block);
1744 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1747 value = do_strict_conv(dbgi, value);
1749 ir_node *memory = get_store();
1751 if (is_type_scalar(type)) {
1752 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1753 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1754 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1755 set_Store_volatility(store, volatility_is_volatile);
1756 set_store(store_mem);
1758 ir_type *irtype = get_ir_type(type);
1759 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1760 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1761 set_store(copyb_mem);
1765 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1767 tarval *all_one = get_mode_all_one(mode);
1768 int mode_size = get_mode_size_bits(mode);
1770 assert(offset >= 0);
1772 assert(offset + size <= mode_size);
1773 if (size == mode_size) {
1777 long shiftr = get_mode_size_bits(mode) - size;
1778 long shiftl = offset;
1779 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1780 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1781 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1782 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1787 static void bitfield_store_to_firm(dbg_info *dbgi,
1788 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1790 ir_type *entity_type = get_entity_type(entity);
1791 ir_type *base_type = get_primitive_base_type(entity_type);
1792 assert(base_type != NULL);
1793 ir_mode *mode = get_type_mode(base_type);
1795 value = create_conv(dbgi, value, mode);
1797 /* kill upper bits of value and shift to right position */
1798 int bitoffset = get_entity_offset_bits_remainder(entity);
1799 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1801 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1802 ir_node *mask_node = new_d_Const(dbgi, mask);
1803 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1804 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1805 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1806 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1808 /* load current value */
1809 ir_node *mem = get_store();
1810 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1811 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1812 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1813 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1814 tarval *inv_mask = tarval_not(shift_mask);
1815 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1816 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1818 /* construct new value and store */
1819 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1820 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1821 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1822 set_store(store_mem);
1825 set_Load_volatility(load, volatility_is_volatile);
1826 set_Store_volatility(store, volatility_is_volatile);
1830 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1833 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1834 type_t *type = expression->base.type;
1835 ir_mode *mode = get_ir_mode(type);
1836 ir_node *mem = get_store();
1837 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1838 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1839 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1841 load_res = create_conv(dbgi, load_res, mode_int);
1843 set_store(load_mem);
1845 /* kill upper bits */
1846 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1847 ir_entity *entity = expression->compound_entry->compound_member.entity;
1848 int bitoffset = get_entity_offset_bits_remainder(entity);
1849 ir_type *entity_type = get_entity_type(entity);
1850 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1851 long shift_bitsl = machine_size - bitoffset - bitsize;
1852 assert(shift_bitsl >= 0);
1853 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1854 ir_node *countl = new_d_Const(dbgi, tvl);
1855 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1857 long shift_bitsr = bitoffset + shift_bitsl;
1858 assert(shift_bitsr <= (long) machine_size);
1859 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1860 ir_node *countr = new_d_Const(dbgi, tvr);
1862 if (mode_is_signed(mode)) {
1863 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1865 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1868 return create_conv(dbgi, shiftr, mode);
1871 /* make sure the selected compound type is constructed */
1872 static void construct_select_compound(const select_expression_t *expression)
1874 type_t *type = skip_typeref(expression->compound->base.type);
1875 if (is_type_pointer(type)) {
1876 type = type->pointer.points_to;
1878 (void) get_ir_type(type);
1881 static void set_value_for_expression_addr(const expression_t *expression,
1882 ir_node *value, ir_node *addr)
1884 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1885 value = do_strict_conv(dbgi, value);
1887 if (expression->kind == EXPR_REFERENCE) {
1888 const reference_expression_t *ref = &expression->reference;
1890 entity_t *entity = ref->entity;
1891 assert(is_declaration(entity));
1892 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1893 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1894 set_value(entity->variable.v.value_number, value);
1896 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1897 set_value(entity->parameter.v.value_number, value);
1903 addr = expression_to_addr(expression);
1904 assert(addr != NULL);
1906 type_t *type = skip_typeref(expression->base.type);
1908 if (expression->kind == EXPR_SELECT) {
1909 const select_expression_t *select = &expression->select;
1911 construct_select_compound(select);
1913 entity_t *entity = select->compound_entry;
1914 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1915 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1916 ir_entity *irentity = entity->compound_member.entity;
1918 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1919 bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1924 assign_value(dbgi, addr, type, value);
1927 static void set_value_for_expression(const expression_t *expression,
1930 set_value_for_expression_addr(expression, value, NULL);
1933 static ir_node *get_value_from_lvalue(const expression_t *expression,
1936 if (expression->kind == EXPR_REFERENCE) {
1937 const reference_expression_t *ref = &expression->reference;
1939 entity_t *entity = ref->entity;
1940 assert(entity->kind == ENTITY_VARIABLE
1941 || entity->kind == ENTITY_PARAMETER);
1942 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1943 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1944 assert(addr == NULL);
1945 ir_mode *mode = get_ir_mode(expression->base.type);
1946 return get_value(entity->variable.v.value_number, mode);
1947 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1948 assert(addr == NULL);
1949 ir_mode *mode = get_ir_mode(expression->base.type);
1950 return get_value(entity->parameter.v.value_number, mode);
1954 assert(addr != NULL);
1955 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1958 if (expression->kind == EXPR_SELECT &&
1959 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1960 construct_select_compound(&expression->select);
1961 value = bitfield_extract_to_firm(&expression->select, addr);
1963 value = deref_address(dbgi, expression->base.type, addr);
1970 static ir_node *create_incdec(const unary_expression_t *expression)
1972 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1973 const expression_t *value_expr = expression->value;
1974 ir_node *addr = expression_to_addr(value_expr);
1975 ir_node *value = get_value_from_lvalue(value_expr, addr);
1977 type_t *type = skip_typeref(expression->base.type);
1978 ir_mode *mode = get_ir_mode(expression->base.type);
1981 if (is_type_pointer(type)) {
1982 pointer_type_t *pointer_type = &type->pointer;
1983 offset = get_type_size(pointer_type->points_to);
1985 assert(is_type_arithmetic(type));
1986 offset = new_Const(get_mode_one(mode));
1990 ir_node *store_value;
1991 switch(expression->base.kind) {
1992 case EXPR_UNARY_POSTFIX_INCREMENT:
1994 store_value = new_d_Add(dbgi, value, offset, mode);
1996 case EXPR_UNARY_POSTFIX_DECREMENT:
1998 store_value = new_d_Sub(dbgi, value, offset, mode);
2000 case EXPR_UNARY_PREFIX_INCREMENT:
2001 result = new_d_Add(dbgi, value, offset, mode);
2002 store_value = result;
2004 case EXPR_UNARY_PREFIX_DECREMENT:
2005 result = new_d_Sub(dbgi, value, offset, mode);
2006 store_value = result;
2009 panic("no incdec expr in create_incdec");
2012 set_value_for_expression_addr(value_expr, store_value, addr);
2017 static bool is_local_variable(expression_t *expression)
2019 if (expression->kind != EXPR_REFERENCE)
2021 reference_expression_t *ref_expr = &expression->reference;
2022 entity_t *entity = ref_expr->entity;
2023 if (entity->kind != ENTITY_VARIABLE)
2025 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2026 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2029 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2032 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2033 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2034 case EXPR_BINARY_NOTEQUAL:
2035 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2036 case EXPR_BINARY_ISLESS:
2037 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2038 case EXPR_BINARY_ISLESSEQUAL:
2039 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2040 case EXPR_BINARY_ISGREATER:
2041 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2042 case EXPR_BINARY_ISGREATEREQUAL:
2043 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2044 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2049 panic("trying to get pn_Cmp from non-comparison binexpr type");
2053 * Handle the assume optimizer hint: check if a Confirm
2054 * node can be created.
2056 * @param dbi debug info
2057 * @param expr the IL assume expression
2059 * we support here only some simple cases:
2064 static ir_node *handle_assume_compare(dbg_info *dbi,
2065 const binary_expression_t *expression)
2067 expression_t *op1 = expression->left;
2068 expression_t *op2 = expression->right;
2069 entity_t *var2, *var = NULL;
2070 ir_node *res = NULL;
2073 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2075 if (is_local_variable(op1) && is_local_variable(op2)) {
2076 var = op1->reference.entity;
2077 var2 = op2->reference.entity;
2079 type_t *const type = skip_typeref(var->declaration.type);
2080 ir_mode *const mode = get_ir_mode(type);
2082 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2083 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2085 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2086 set_value(var2->variable.v.value_number, res);
2088 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2089 set_value(var->variable.v.value_number, res);
2095 if (is_local_variable(op1) && is_constant_expression(op2)) {
2096 var = op1->reference.entity;
2098 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2099 cmp_val = get_inversed_pnc(cmp_val);
2100 var = op2->reference.entity;
2105 type_t *const type = skip_typeref(var->declaration.type);
2106 ir_mode *const mode = get_ir_mode(type);
2108 res = get_value(var->variable.v.value_number, mode);
2109 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2110 set_value(var->variable.v.value_number, res);
2116 * Handle the assume optimizer hint.
2118 * @param dbi debug info
2119 * @param expr the IL assume expression
2121 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2122 switch(expression->kind) {
2123 case EXPR_BINARY_EQUAL:
2124 case EXPR_BINARY_NOTEQUAL:
2125 case EXPR_BINARY_LESS:
2126 case EXPR_BINARY_LESSEQUAL:
2127 case EXPR_BINARY_GREATER:
2128 case EXPR_BINARY_GREATEREQUAL:
2129 return handle_assume_compare(dbi, &expression->binary);
2135 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2137 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2138 type_t *type = skip_typeref(expression->base.type);
2140 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2141 return expression_to_addr(expression->value);
2143 const expression_t *value = expression->value;
2145 switch(expression->base.kind) {
2146 case EXPR_UNARY_NEGATE: {
2147 ir_node *value_node = expression_to_firm(value);
2148 ir_mode *mode = get_ir_mode(type);
2149 return new_d_Minus(dbgi, value_node, mode);
2151 case EXPR_UNARY_PLUS:
2152 return expression_to_firm(value);
2153 case EXPR_UNARY_BITWISE_NEGATE: {
2154 ir_node *value_node = expression_to_firm(value);
2155 ir_mode *mode = get_ir_mode(type);
2156 return new_d_Not(dbgi, value_node, mode);
2158 case EXPR_UNARY_NOT: {
2159 ir_node *value_node = _expression_to_firm(value);
2160 value_node = create_conv(dbgi, value_node, mode_b);
2161 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2164 case EXPR_UNARY_DEREFERENCE: {
2165 ir_node *value_node = expression_to_firm(value);
2166 type_t *value_type = skip_typeref(value->base.type);
2167 assert(is_type_pointer(value_type));
2168 type_t *points_to = value_type->pointer.points_to;
2169 return deref_address(dbgi, points_to, value_node);
2171 case EXPR_UNARY_POSTFIX_INCREMENT:
2172 case EXPR_UNARY_POSTFIX_DECREMENT:
2173 case EXPR_UNARY_PREFIX_INCREMENT:
2174 case EXPR_UNARY_PREFIX_DECREMENT:
2175 return create_incdec(expression);
2176 case EXPR_UNARY_CAST: {
2177 ir_node *value_node = expression_to_firm(value);
2178 if (is_type_scalar(type)) {
2179 ir_mode *mode = get_ir_mode(type);
2180 ir_node *node = create_conv(dbgi, value_node, mode);
2181 node = do_strict_conv(dbgi, node);
2184 /* make sure firm type is constructed */
2185 (void) get_ir_type(type);
2189 case EXPR_UNARY_CAST_IMPLICIT: {
2190 ir_node *value_node = expression_to_firm(value);
2191 if (is_type_scalar(type)) {
2192 ir_mode *mode = get_ir_mode(type);
2193 return create_conv(dbgi, value_node, mode);
2198 case EXPR_UNARY_ASSUME:
2199 if (firm_opt.confirm)
2200 return handle_assume(dbgi, value);
2207 panic("invalid UNEXPR type found");
2211 * produces a 0/1 depending of the value of a mode_b node
2213 static ir_node *produce_condition_result(const expression_t *expression,
2214 ir_mode *mode, dbg_info *dbgi)
2216 ir_node *cur_block = get_cur_block();
2218 ir_node *one_block = new_immBlock();
2219 ir_node *one = new_Const(get_mode_one(mode));
2220 ir_node *jmp_one = new_d_Jmp(dbgi);
2222 ir_node *zero_block = new_immBlock();
2223 ir_node *zero = new_Const(get_mode_null(mode));
2224 ir_node *jmp_zero = new_d_Jmp(dbgi);
2226 set_cur_block(cur_block);
2227 create_condition_evaluation(expression, one_block, zero_block);
2228 mature_immBlock(one_block);
2229 mature_immBlock(zero_block);
2231 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2232 new_Block(2, in_cf);
2234 ir_node *in[2] = { one, zero };
2235 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2240 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2241 ir_node *value, type_t *type)
2243 pointer_type_t *const pointer_type = &type->pointer;
2244 type_t *const points_to = skip_typeref(pointer_type->points_to);
2245 unsigned elem_size = get_type_size_const(points_to);
2247 /* gcc extension: allow arithmetic with void * and function * */
2248 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2249 is_type_function(points_to)) {
2253 assert(elem_size >= 1);
2257 value = create_conv(dbgi, value, mode_int);
2258 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2259 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode_int);
2263 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2264 ir_node *left, ir_node *right)
2267 type_t *type_left = skip_typeref(expression->left->base.type);
2268 type_t *type_right = skip_typeref(expression->right->base.type);
2270 expression_kind_t kind = expression->base.kind;
2273 case EXPR_BINARY_SHIFTLEFT:
2274 case EXPR_BINARY_SHIFTRIGHT:
2275 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2276 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2277 mode = get_irn_mode(left);
2278 right = create_conv(dbgi, right, mode_uint);
2281 case EXPR_BINARY_SUB:
2282 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2283 const pointer_type_t *const ptr_type = &type_left->pointer;
2285 mode = get_ir_mode(expression->base.type);
2286 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2287 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2288 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2289 ir_node *const no_mem = new_NoMem();
2290 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2291 mode, op_pin_state_floats);
2292 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2295 case EXPR_BINARY_SUB_ASSIGN:
2296 if (is_type_pointer(type_left)) {
2297 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2298 mode = get_ir_mode(type_left);
2303 case EXPR_BINARY_ADD:
2304 case EXPR_BINARY_ADD_ASSIGN:
2305 if (is_type_pointer(type_left)) {
2306 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2307 mode = get_ir_mode(type_left);
2309 } else if (is_type_pointer(type_right)) {
2310 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2311 mode = get_ir_mode(type_right);
2318 mode = get_ir_mode(type_right);
2319 left = create_conv(dbgi, left, mode);
2324 case EXPR_BINARY_ADD_ASSIGN:
2325 case EXPR_BINARY_ADD:
2326 return new_d_Add(dbgi, left, right, mode);
2327 case EXPR_BINARY_SUB_ASSIGN:
2328 case EXPR_BINARY_SUB:
2329 return new_d_Sub(dbgi, left, right, mode);
2330 case EXPR_BINARY_MUL_ASSIGN:
2331 case EXPR_BINARY_MUL:
2332 return new_d_Mul(dbgi, left, right, mode);
2333 case EXPR_BINARY_BITWISE_AND:
2334 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2335 return new_d_And(dbgi, left, right, mode);
2336 case EXPR_BINARY_BITWISE_OR:
2337 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2338 return new_d_Or(dbgi, left, right, mode);
2339 case EXPR_BINARY_BITWISE_XOR:
2340 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2341 return new_d_Eor(dbgi, left, right, mode);
2342 case EXPR_BINARY_SHIFTLEFT:
2343 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2344 return new_d_Shl(dbgi, left, right, mode);
2345 case EXPR_BINARY_SHIFTRIGHT:
2346 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2347 if (mode_is_signed(mode)) {
2348 return new_d_Shrs(dbgi, left, right, mode);
2350 return new_d_Shr(dbgi, left, right, mode);
2352 case EXPR_BINARY_DIV:
2353 case EXPR_BINARY_DIV_ASSIGN: {
2354 ir_node *pin = new_Pin(new_NoMem());
2357 if (mode_is_float(mode)) {
2358 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2359 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2361 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2362 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2366 case EXPR_BINARY_MOD:
2367 case EXPR_BINARY_MOD_ASSIGN: {
2368 ir_node *pin = new_Pin(new_NoMem());
2369 assert(!mode_is_float(mode));
2370 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2371 op_pin_state_floats);
2372 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2376 panic("unexpected expression kind");
2380 static ir_node *create_lazy_op(const binary_expression_t *expression)
2382 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2383 type_t *type = expression->base.type;
2384 ir_mode *mode = get_ir_mode(type);
2386 if (is_constant_expression(expression->left)) {
2387 long val = fold_constant(expression->left);
2388 expression_kind_t ekind = expression->base.kind;
2389 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2390 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2391 (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2392 return produce_condition_result(expression->right, mode, dbgi);
2394 return new_Const(get_mode_one(mode));
2398 return produce_condition_result((const expression_t*) expression, mode,
2402 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2403 ir_node *right, ir_mode *mode);
2405 static ir_node *create_assign_binop(const binary_expression_t *expression)
2407 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2408 const expression_t *left_expr = expression->left;
2409 ir_mode *left_mode = get_ir_mode(left_expr->base.type);
2410 ir_node *right = expression_to_firm(expression->right);
2411 ir_node *left_addr = expression_to_addr(left_expr);
2412 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2413 ir_node *result = create_op(dbgi, expression, left, right);
2415 result = create_conv(dbgi, result, left_mode);
2416 result = do_strict_conv(dbgi, result);
2418 set_value_for_expression_addr(left_expr, result, left_addr);
2423 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2425 expression_kind_t kind = expression->base.kind;
2428 case EXPR_BINARY_EQUAL:
2429 case EXPR_BINARY_NOTEQUAL:
2430 case EXPR_BINARY_LESS:
2431 case EXPR_BINARY_LESSEQUAL:
2432 case EXPR_BINARY_GREATER:
2433 case EXPR_BINARY_GREATEREQUAL:
2434 case EXPR_BINARY_ISGREATER:
2435 case EXPR_BINARY_ISGREATEREQUAL:
2436 case EXPR_BINARY_ISLESS:
2437 case EXPR_BINARY_ISLESSEQUAL:
2438 case EXPR_BINARY_ISLESSGREATER:
2439 case EXPR_BINARY_ISUNORDERED: {
2440 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2441 ir_node *left = expression_to_firm(expression->left);
2442 ir_node *right = expression_to_firm(expression->right);
2443 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2444 long pnc = get_pnc(kind, expression->left->base.type);
2445 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2448 case EXPR_BINARY_ASSIGN: {
2449 ir_node *addr = expression_to_addr(expression->left);
2450 ir_node *right = expression_to_firm(expression->right);
2451 set_value_for_expression_addr(expression->left, right, addr);
2455 case EXPR_BINARY_ADD:
2456 case EXPR_BINARY_SUB:
2457 case EXPR_BINARY_MUL:
2458 case EXPR_BINARY_DIV:
2459 case EXPR_BINARY_MOD:
2460 case EXPR_BINARY_BITWISE_AND:
2461 case EXPR_BINARY_BITWISE_OR:
2462 case EXPR_BINARY_BITWISE_XOR:
2463 case EXPR_BINARY_SHIFTLEFT:
2464 case EXPR_BINARY_SHIFTRIGHT:
2466 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2467 ir_node *left = expression_to_firm(expression->left);
2468 ir_node *right = expression_to_firm(expression->right);
2469 return create_op(dbgi, expression, left, right);
2471 case EXPR_BINARY_LOGICAL_AND:
2472 case EXPR_BINARY_LOGICAL_OR:
2473 return create_lazy_op(expression);
2474 case EXPR_BINARY_COMMA:
2475 /* create side effects of left side */
2476 (void) expression_to_firm(expression->left);
2477 return _expression_to_firm(expression->right);
2479 case EXPR_BINARY_ADD_ASSIGN:
2480 case EXPR_BINARY_SUB_ASSIGN:
2481 case EXPR_BINARY_MUL_ASSIGN:
2482 case EXPR_BINARY_MOD_ASSIGN:
2483 case EXPR_BINARY_DIV_ASSIGN:
2484 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2485 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2486 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2487 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2488 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2489 return create_assign_binop(expression);
2491 panic("TODO binexpr type");
2495 static ir_node *array_access_addr(const array_access_expression_t *expression)
2497 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2498 ir_node *base_addr = expression_to_firm(expression->array_ref);
2499 ir_node *offset = expression_to_firm(expression->index);
2501 type_t *offset_type = skip_typeref(expression->index->base.type);
2503 if (is_type_signed(offset_type)) {
2504 mode = get_ir_mode(type_ssize_t);
2506 mode = get_ir_mode(type_size_t);
2508 offset = create_conv(dbgi, offset, mode);
2510 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2511 assert(is_type_pointer(ref_type));
2512 pointer_type_t *pointer_type = &ref_type->pointer;
2514 ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2515 elem_size_const = create_conv(dbgi, elem_size_const, mode);
2516 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
2518 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2523 static ir_node *array_access_to_firm(
2524 const array_access_expression_t *expression)
2526 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2527 ir_node *addr = array_access_addr(expression);
2528 type_t *type = revert_automatic_type_conversion(
2529 (const expression_t*) expression);
2530 type = skip_typeref(type);
2532 return deref_address(dbgi, type, addr);
2535 static long get_offsetof_offset(const offsetof_expression_t *expression)
2537 type_t *orig_type = expression->type;
2540 designator_t *designator = expression->designator;
2541 for ( ; designator != NULL; designator = designator->next) {
2542 type_t *type = skip_typeref(orig_type);
2543 /* be sure the type is constructed */
2544 (void) get_ir_type(type);
2546 if (designator->symbol != NULL) {
2547 assert(is_type_compound(type));
2548 symbol_t *symbol = designator->symbol;
2550 compound_t *compound = type->compound.compound;
2551 entity_t *iter = compound->members.entities;
2552 for ( ; iter != NULL; iter = iter->base.next) {
2553 if (iter->base.symbol == symbol) {
2557 assert(iter != NULL);
2559 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2560 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2561 offset += get_entity_offset(iter->compound_member.entity);
2563 orig_type = iter->declaration.type;
2565 expression_t *array_index = designator->array_index;
2566 assert(designator->array_index != NULL);
2567 assert(is_type_array(type));
2569 long index = fold_constant(array_index);
2570 ir_type *arr_type = get_ir_type(type);
2571 ir_type *elem_type = get_array_element_type(arr_type);
2572 long elem_size = get_type_size_bytes(elem_type);
2574 offset += index * elem_size;
2576 orig_type = type->array.element_type;
2583 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2585 ir_mode *mode = get_ir_mode(expression->base.type);
2586 long offset = get_offsetof_offset(expression);
2587 tarval *tv = new_tarval_from_long(offset, mode);
2588 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2590 return new_d_Const(dbgi, tv);
2593 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2594 ir_entity *entity, type_t *type);
2596 static ir_node *compound_literal_to_firm(
2597 const compound_literal_expression_t *expression)
2599 type_t *type = expression->type;
2601 /* create an entity on the stack */
2602 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2604 ident *const id = id_unique("CompLit.%u");
2605 ir_type *const irtype = get_ir_type(type);
2606 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2607 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2608 set_entity_ld_ident(entity, id);
2610 set_entity_variability(entity, variability_uninitialized);
2612 /* create initialisation code */
2613 initializer_t *initializer = expression->initializer;
2614 create_local_initializer(initializer, dbgi, entity, type);
2616 /* create a sel for the compound literal address */
2617 ir_node *frame = get_local_frame(entity);
2618 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2623 * Transform a sizeof expression into Firm code.
2625 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2627 type_t *type = expression->type;
2629 type = expression->tp_expression->base.type;
2630 assert(type != NULL);
2633 type = skip_typeref(type);
2634 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2635 if (is_type_array(type) && type->array.is_vla
2636 && expression->tp_expression != NULL) {
2637 expression_to_firm(expression->tp_expression);
2640 return get_type_size(type);
2644 * Transform an alignof expression into Firm code.
2646 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2648 type_t *type = expression->type;
2650 /* beware: if expression is a variable reference, return the
2651 alignment of the variable. */
2652 const expression_t *tp_expression = expression->tp_expression;
2653 const entity_t *entity = expression_is_variable(tp_expression);
2654 if (entity != NULL) {
2655 /* TODO: get the alignment of this variable. */
2658 type = tp_expression->base.type;
2659 assert(type != NULL);
2662 ir_mode *const mode = get_ir_mode(expression->base.type);
2663 symconst_symbol sym;
2664 sym.type_p = get_ir_type(type);
2665 return new_SymConst(mode, sym, symconst_type_align);
2668 static void init_ir_types(void);
2670 long fold_constant(const expression_t *expression)
2672 assert(is_type_valid(skip_typeref(expression->base.type)));
2674 bool constant_folding_old = constant_folding;
2675 constant_folding = true;
2679 assert(is_constant_expression(expression));
2681 ir_graph *old_current_ir_graph = current_ir_graph;
2682 if (current_ir_graph == NULL) {
2683 current_ir_graph = get_const_code_irg();
2686 ir_node *cnst = expression_to_firm(expression);
2687 current_ir_graph = old_current_ir_graph;
2689 if (!is_Const(cnst)) {
2690 panic("couldn't fold constant\n");
2693 tarval *tv = get_Const_tarval(cnst);
2694 if (!tarval_is_long(tv)) {
2695 panic("result of constant folding is not integer\n");
2698 constant_folding = constant_folding_old;
2700 return get_tarval_long(tv);
2703 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2705 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2707 /* first try to fold a constant condition */
2708 if (is_constant_expression(expression->condition)) {
2709 long val = fold_constant(expression->condition);
2711 expression_t *true_expression = expression->true_expression;
2712 if (true_expression == NULL)
2713 true_expression = expression->condition;
2714 return expression_to_firm(true_expression);
2716 return expression_to_firm(expression->false_expression);
2720 ir_node *cur_block = get_cur_block();
2722 /* create the true block */
2723 ir_node *true_block = new_immBlock();
2725 ir_node *true_val = expression->true_expression != NULL ?
2726 expression_to_firm(expression->true_expression) : NULL;
2727 ir_node *true_jmp = new_Jmp();
2729 /* create the false block */
2730 ir_node *false_block = new_immBlock();
2732 ir_node *false_val = expression_to_firm(expression->false_expression);
2733 ir_node *false_jmp = new_Jmp();
2735 /* create the condition evaluation */
2736 set_cur_block(cur_block);
2737 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2738 if (expression->true_expression == NULL) {
2739 if (cond_expr != NULL) {
2740 true_val = cond_expr;
2742 /* Condition ended with a short circuit (&&, ||, !) operation.
2743 * Generate a "1" as value for the true branch. */
2744 true_val = new_Const(get_mode_one(mode_Is));
2747 mature_immBlock(true_block);
2748 mature_immBlock(false_block);
2750 /* create the common block */
2751 ir_node *in_cf[2] = { true_jmp, false_jmp };
2752 new_Block(2, in_cf);
2754 /* TODO improve static semantics, so either both or no values are NULL */
2755 if (true_val == NULL || false_val == NULL)
2758 ir_node *in[2] = { true_val, false_val };
2759 ir_mode *mode = get_irn_mode(true_val);
2760 assert(get_irn_mode(false_val) == mode);
2761 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2767 * Returns an IR-node representing the address of a field.
2769 static ir_node *select_addr(const select_expression_t *expression)
2771 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2773 construct_select_compound(expression);
2775 ir_node *compound_addr = expression_to_firm(expression->compound);
2777 entity_t *entry = expression->compound_entry;
2778 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2779 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2780 ir_entity *irentity = entry->compound_member.entity;
2782 assert(irentity != NULL);
2784 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2789 static ir_node *select_to_firm(const select_expression_t *expression)
2791 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2792 ir_node *addr = select_addr(expression);
2793 type_t *type = revert_automatic_type_conversion(
2794 (const expression_t*) expression);
2795 type = skip_typeref(type);
2797 entity_t *entry = expression->compound_entry;
2798 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2799 type_t *entry_type = skip_typeref(entry->declaration.type);
2801 if (entry_type->kind == TYPE_BITFIELD) {
2802 return bitfield_extract_to_firm(expression, addr);
2805 return deref_address(dbgi, type, addr);
2808 /* Values returned by __builtin_classify_type. */
2809 typedef enum gcc_type_class
2815 enumeral_type_class,
2818 reference_type_class,
2822 function_type_class,
2833 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2835 type_t *type = expr->type_expression->base.type;
2837 /* FIXME gcc returns different values depending on whether compiling C or C++
2838 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2841 type = skip_typeref(type);
2842 switch (type->kind) {
2844 const atomic_type_t *const atomic_type = &type->atomic;
2845 switch (atomic_type->akind) {
2846 /* should not be reached */
2847 case ATOMIC_TYPE_INVALID:
2851 /* gcc cannot do that */
2852 case ATOMIC_TYPE_VOID:
2853 tc = void_type_class;
2856 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2857 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2858 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2859 case ATOMIC_TYPE_SHORT:
2860 case ATOMIC_TYPE_USHORT:
2861 case ATOMIC_TYPE_INT:
2862 case ATOMIC_TYPE_UINT:
2863 case ATOMIC_TYPE_LONG:
2864 case ATOMIC_TYPE_ULONG:
2865 case ATOMIC_TYPE_LONGLONG:
2866 case ATOMIC_TYPE_ULONGLONG:
2867 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2868 tc = integer_type_class;
2871 case ATOMIC_TYPE_FLOAT:
2872 case ATOMIC_TYPE_DOUBLE:
2873 case ATOMIC_TYPE_LONG_DOUBLE:
2874 tc = real_type_class;
2877 panic("Unexpected atomic type in classify_type_to_firm().");
2880 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2881 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2882 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2883 case TYPE_ARRAY: /* gcc handles this as pointer */
2884 case TYPE_FUNCTION: /* gcc handles this as pointer */
2885 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2886 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2887 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2889 /* gcc handles this as integer */
2890 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2892 /* gcc classifies the referenced type */
2893 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2896 /* typedef/typeof should be skipped already */
2903 panic("unexpected TYPE classify_type_to_firm().");
2907 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2908 tarval *const tv = new_tarval_from_long(tc, mode_int);
2909 return new_d_Const(dbgi, tv);
2912 static ir_node *function_name_to_firm(
2913 const funcname_expression_t *const expr)
2915 switch(expr->kind) {
2916 case FUNCNAME_FUNCTION:
2917 case FUNCNAME_PRETTY_FUNCTION:
2918 case FUNCNAME_FUNCDNAME:
2919 if (current_function_name == NULL) {
2920 const source_position_t *const src_pos = &expr->base.source_position;
2921 const char *name = current_function_entity->base.symbol->string;
2922 const string_t string = { name, strlen(name) + 1 };
2923 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2925 return current_function_name;
2926 case FUNCNAME_FUNCSIG:
2927 if (current_funcsig == NULL) {
2928 const source_position_t *const src_pos = &expr->base.source_position;
2929 ir_entity *ent = get_irg_entity(current_ir_graph);
2930 const char *const name = get_entity_ld_name(ent);
2931 const string_t string = { name, strlen(name) + 1 };
2932 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2934 return current_funcsig;
2936 panic("Unsupported function name");
2939 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2941 statement_t *statement = expr->statement;
2943 assert(statement->kind == STATEMENT_COMPOUND);
2944 return compound_statement_to_firm(&statement->compound);
2947 static ir_node *va_start_expression_to_firm(
2948 const va_start_expression_t *const expr)
2950 type_t *const type = current_function_entity->declaration.type;
2951 ir_type *const method_type = get_ir_type(type);
2952 int const n = get_method_n_params(method_type) - 1;
2953 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2954 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2955 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2956 ir_node *const no_mem = new_NoMem();
2957 ir_node *const arg_sel =
2958 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2960 ir_node *const cnst = get_type_size(expr->parameter->base.type);
2961 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2962 set_value_for_expression(expr->ap, add);
2967 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2969 type_t *const type = expr->base.type;
2970 expression_t *const ap_expr = expr->ap;
2971 ir_node *const ap_addr = expression_to_addr(ap_expr);
2972 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
2973 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2974 ir_node *const res = deref_address(dbgi, type, ap);
2976 ir_node *const cnst = get_type_size(expr->base.type);
2977 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2979 set_value_for_expression_addr(ap_expr, add, ap_addr);
2984 static ir_node *dereference_addr(const unary_expression_t *const expression)
2986 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2987 return expression_to_firm(expression->value);
2991 * Returns a IR-node representing an lvalue of the given expression.
2993 static ir_node *expression_to_addr(const expression_t *expression)
2995 switch(expression->kind) {
2996 case EXPR_REFERENCE:
2997 return reference_addr(&expression->reference);
2998 case EXPR_ARRAY_ACCESS:
2999 return array_access_addr(&expression->array_access);
3001 return select_addr(&expression->select);
3003 return call_expression_to_firm(&expression->call);
3004 case EXPR_UNARY_DEREFERENCE: {
3005 return dereference_addr(&expression->unary);
3010 panic("trying to get address of non-lvalue");
3013 static ir_node *builtin_constant_to_firm(
3014 const builtin_constant_expression_t *expression)
3016 ir_mode *mode = get_ir_mode(expression->base.type);
3019 if (is_constant_expression(expression->value)) {
3024 return new_Const_long(mode, v);
3027 static ir_node *builtin_prefetch_to_firm(
3028 const builtin_prefetch_expression_t *expression)
3030 ir_node *adr = expression_to_firm(expression->adr);
3031 /* no Firm support for prefetch yet */
3036 static ir_node *get_label_block(label_t *label)
3038 if (label->block != NULL)
3039 return label->block;
3041 /* beware: might be called from create initializer with current_ir_graph
3042 * set to const_code_irg. */
3043 ir_graph *rem = current_ir_graph;
3044 current_ir_graph = current_function;
3046 ir_node *old_cur_block = get_cur_block();
3047 ir_node *block = new_immBlock();
3048 set_cur_block(old_cur_block);
3050 label->block = block;
3052 ARR_APP1(label_t *, all_labels, label);
3054 current_ir_graph = rem;
3059 * Pointer to a label. This is used for the
3060 * GNU address-of-label extension.
3062 static ir_node *label_address_to_firm(
3063 const label_address_expression_t *label)
3065 ir_node *block = get_label_block(label->label);
3066 ir_label_t nr = get_Block_label(block);
3069 nr = get_irp_next_label_nr();
3070 set_Block_label(block, nr);
3072 symconst_symbol value;
3074 return new_SymConst(mode_P_code, value, symconst_label);
3077 static ir_node *builtin_symbol_to_firm(
3078 const builtin_symbol_expression_t *expression)
3080 /* for gcc compatibility we have to produce (dummy) addresses for some
3082 if (warning.other) {
3083 warningf(&expression->base.source_position,
3084 "taking address of builtin '%Y'", expression->symbol);
3087 /* simply create a NULL pointer */
3088 ir_mode *mode = get_ir_mode(type_void_ptr);
3089 ir_node *res = new_Const_long(mode, 0);
3095 * creates firm nodes for an expression. The difference between this function
3096 * and expression_to_firm is, that this version might produce mode_b nodes
3097 * instead of mode_Is.
3099 static ir_node *_expression_to_firm(const expression_t *expression)
3102 if (!constant_folding) {
3103 assert(!expression->base.transformed);
3104 ((expression_t*) expression)->base.transformed = true;
3108 switch (expression->kind) {
3109 case EXPR_CHARACTER_CONSTANT:
3110 return character_constant_to_firm(&expression->conste);
3111 case EXPR_WIDE_CHARACTER_CONSTANT:
3112 return wide_character_constant_to_firm(&expression->conste);
3114 return const_to_firm(&expression->conste);
3115 case EXPR_STRING_LITERAL:
3116 return string_literal_to_firm(&expression->string);
3117 case EXPR_WIDE_STRING_LITERAL:
3118 return wide_string_literal_to_firm(&expression->wide_string);
3119 case EXPR_REFERENCE:
3120 return reference_expression_to_firm(&expression->reference);
3121 case EXPR_REFERENCE_ENUM_VALUE:
3122 return reference_expression_enum_value_to_firm(&expression->reference);
3124 return call_expression_to_firm(&expression->call);
3126 return unary_expression_to_firm(&expression->unary);
3128 return binary_expression_to_firm(&expression->binary);
3129 case EXPR_ARRAY_ACCESS:
3130 return array_access_to_firm(&expression->array_access);
3132 return sizeof_to_firm(&expression->typeprop);
3134 return alignof_to_firm(&expression->typeprop);
3135 case EXPR_CONDITIONAL:
3136 return conditional_to_firm(&expression->conditional);
3138 return select_to_firm(&expression->select);
3139 case EXPR_CLASSIFY_TYPE:
3140 return classify_type_to_firm(&expression->classify_type);
3142 return function_name_to_firm(&expression->funcname);
3143 case EXPR_STATEMENT:
3144 return statement_expression_to_firm(&expression->statement);
3146 return va_start_expression_to_firm(&expression->va_starte);
3148 return va_arg_expression_to_firm(&expression->va_arge);
3149 case EXPR_BUILTIN_SYMBOL:
3150 return builtin_symbol_to_firm(&expression->builtin_symbol);
3151 case EXPR_BUILTIN_CONSTANT_P:
3152 return builtin_constant_to_firm(&expression->builtin_constant);
3153 case EXPR_BUILTIN_PREFETCH:
3154 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3156 return offsetof_to_firm(&expression->offsetofe);
3157 case EXPR_COMPOUND_LITERAL:
3158 return compound_literal_to_firm(&expression->compound_literal);
3159 case EXPR_LABEL_ADDRESS:
3160 return label_address_to_firm(&expression->label_address);
3166 panic("invalid expression found");
3169 static bool is_builtin_expect(const expression_t *expression)
3171 if (expression->kind != EXPR_CALL)
3174 expression_t *function = expression->call.function;
3175 if (function->kind != EXPR_BUILTIN_SYMBOL)
3177 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3183 static bool produces_mode_b(const expression_t *expression)
3185 switch (expression->kind) {
3186 case EXPR_BINARY_EQUAL:
3187 case EXPR_BINARY_NOTEQUAL:
3188 case EXPR_BINARY_LESS:
3189 case EXPR_BINARY_LESSEQUAL:
3190 case EXPR_BINARY_GREATER:
3191 case EXPR_BINARY_GREATEREQUAL:
3192 case EXPR_BINARY_ISGREATER:
3193 case EXPR_BINARY_ISGREATEREQUAL:
3194 case EXPR_BINARY_ISLESS:
3195 case EXPR_BINARY_ISLESSEQUAL:
3196 case EXPR_BINARY_ISLESSGREATER:
3197 case EXPR_BINARY_ISUNORDERED:
3198 case EXPR_UNARY_NOT:
3202 if (is_builtin_expect(expression)) {
3203 expression_t *argument = expression->call.arguments->expression;
3204 return produces_mode_b(argument);
3207 case EXPR_BINARY_COMMA:
3208 return produces_mode_b(expression->binary.right);
3215 static ir_node *expression_to_firm(const expression_t *expression)
3217 if (!produces_mode_b(expression)) {
3218 ir_node *res = _expression_to_firm(expression);
3219 assert(res == NULL || get_irn_mode(res) != mode_b);
3223 if (is_constant_expression(expression)) {
3224 ir_node *res = _expression_to_firm(expression);
3225 ir_mode *mode = get_ir_mode(expression->base.type);
3226 assert(is_Const(res));
3227 if (is_Const_null(res)) {
3228 return new_Const_long(mode, 0);
3230 return new_Const_long(mode, 1);
3234 /* we have to produce a 0/1 from the mode_b expression */
3235 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3236 ir_mode *mode = get_ir_mode(expression->base.type);
3237 return produce_condition_result(expression, mode, dbgi);
3241 * create a short-circuit expression evaluation that tries to construct
3242 * efficient control flow structures for &&, || and ! expressions
3244 static ir_node *create_condition_evaluation(const expression_t *expression,
3245 ir_node *true_block,
3246 ir_node *false_block)
3248 switch(expression->kind) {
3249 case EXPR_UNARY_NOT: {
3250 const unary_expression_t *unary_expression = &expression->unary;
3251 create_condition_evaluation(unary_expression->value, false_block,
3255 case EXPR_BINARY_LOGICAL_AND: {
3256 const binary_expression_t *binary_expression = &expression->binary;
3258 ir_node *cur_block = get_cur_block();
3259 ir_node *extra_block = new_immBlock();
3260 set_cur_block(cur_block);
3261 create_condition_evaluation(binary_expression->left, extra_block,
3263 mature_immBlock(extra_block);
3264 set_cur_block(extra_block);
3265 create_condition_evaluation(binary_expression->right, true_block,
3269 case EXPR_BINARY_LOGICAL_OR: {
3270 const binary_expression_t *binary_expression = &expression->binary;
3272 ir_node *cur_block = get_cur_block();
3273 ir_node *extra_block = new_immBlock();
3274 set_cur_block(cur_block);
3275 create_condition_evaluation(binary_expression->left, true_block,
3277 mature_immBlock(extra_block);
3278 set_cur_block(extra_block);
3279 create_condition_evaluation(binary_expression->right, true_block,
3287 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3288 ir_node *cond_expr = _expression_to_firm(expression);
3289 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3290 ir_node *cond = new_d_Cond(dbgi, condition);
3291 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3292 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3294 /* set branch prediction info based on __builtin_expect */
3295 if (is_builtin_expect(expression)) {
3296 call_argument_t *argument = expression->call.arguments->next;
3297 if (is_constant_expression(argument->expression)) {
3298 long cnst = fold_constant(argument->expression);
3299 cond_jmp_predicate pred;
3302 pred = COND_JMP_PRED_FALSE;
3304 pred = COND_JMP_PRED_TRUE;
3306 set_Cond_jmp_pred(cond, pred);
3310 add_immBlock_pred(true_block, true_proj);
3311 if (false_block != NULL) {
3312 add_immBlock_pred(false_block, false_proj);
3315 set_cur_block(NULL);
3320 static void create_variable_entity(entity_t *variable,
3321 declaration_kind_t declaration_kind,
3322 ir_type *parent_type)
3324 assert(variable->kind == ENTITY_VARIABLE);
3325 type_t *const type = skip_typeref(variable->declaration.type);
3326 ident *const id = new_id_from_str(variable->base.symbol->string);
3327 ir_type *const irtype = get_ir_type(type);
3328 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3329 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3331 handle_gnu_attributes_ent(irentity, variable);
3333 variable->declaration.kind = (unsigned char) declaration_kind;
3334 variable->variable.v.entity = irentity;
3335 set_entity_variability(irentity, variability_uninitialized);
3336 set_entity_ld_ident(irentity, create_ld_ident(variable));
3337 if (parent_type == get_tls_type())
3338 set_entity_allocation(irentity, allocation_automatic);
3339 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3340 set_entity_allocation(irentity, allocation_static);
3342 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3343 set_entity_volatility(irentity, volatility_is_volatile);
3348 typedef struct type_path_entry_t type_path_entry_t;
3349 struct type_path_entry_t {
3351 ir_initializer_t *initializer;
3353 entity_t *compound_entry;
3356 typedef struct type_path_t type_path_t;
3357 struct type_path_t {
3358 type_path_entry_t *path;
3363 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3365 size_t len = ARR_LEN(path->path);
3367 for (size_t i = 0; i < len; ++i) {
3368 const type_path_entry_t *entry = & path->path[i];
3370 type_t *type = skip_typeref(entry->type);
3371 if (is_type_compound(type)) {
3372 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3373 } else if (is_type_array(type)) {
3374 fprintf(stderr, "[%u]", (unsigned) entry->index);
3376 fprintf(stderr, "-INVALID-");
3379 fprintf(stderr, " (");
3380 print_type(path->top_type);
3381 fprintf(stderr, ")");
3384 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3386 size_t len = ARR_LEN(path->path);
3388 return & path->path[len-1];
3391 static type_path_entry_t *append_to_type_path(type_path_t *path)
3393 size_t len = ARR_LEN(path->path);
3394 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3396 type_path_entry_t *result = & path->path[len];
3397 memset(result, 0, sizeof(result[0]));
3401 static size_t get_compound_member_count(const compound_type_t *type)
3403 compound_t *compound = type->compound;
3404 size_t n_members = 0;
3405 entity_t *member = compound->members.entities;
3406 for ( ; member != NULL; member = member->base.next) {
3413 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3415 type_t *orig_top_type = path->top_type;
3416 type_t *top_type = skip_typeref(orig_top_type);
3418 assert(is_type_compound(top_type) || is_type_array(top_type));
3420 if (ARR_LEN(path->path) == 0) {
3423 type_path_entry_t *top = get_type_path_top(path);
3424 ir_initializer_t *initializer = top->initializer;
3425 return get_initializer_compound_value(initializer, top->index);
3429 static void descend_into_subtype(type_path_t *path)
3431 type_t *orig_top_type = path->top_type;
3432 type_t *top_type = skip_typeref(orig_top_type);
3434 assert(is_type_compound(top_type) || is_type_array(top_type));
3436 ir_initializer_t *initializer = get_initializer_entry(path);
3438 type_path_entry_t *top = append_to_type_path(path);
3439 top->type = top_type;
3443 if (is_type_compound(top_type)) {
3444 compound_t *compound = top_type->compound.compound;
3445 entity_t *entry = compound->members.entities;
3447 top->compound_entry = entry;
3449 len = get_compound_member_count(&top_type->compound);
3450 if (entry != NULL) {
3451 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3452 path->top_type = entry->declaration.type;
3455 assert(is_type_array(top_type));
3456 assert(top_type->array.size > 0);
3459 path->top_type = top_type->array.element_type;
3460 len = top_type->array.size;
3462 if (initializer == NULL
3463 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3464 initializer = create_initializer_compound(len);
3465 /* we have to set the entry at the 2nd latest path entry... */
3466 size_t path_len = ARR_LEN(path->path);
3467 assert(path_len >= 1);
3469 type_path_entry_t *entry = & path->path[path_len-2];
3470 ir_initializer_t *tinitializer = entry->initializer;
3471 set_initializer_compound_value(tinitializer, entry->index,
3475 top->initializer = initializer;
3478 static void ascend_from_subtype(type_path_t *path)
3480 type_path_entry_t *top = get_type_path_top(path);
3482 path->top_type = top->type;
3484 size_t len = ARR_LEN(path->path);
3485 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3488 static void walk_designator(type_path_t *path, const designator_t *designator)
3490 /* designators start at current object type */
3491 ARR_RESIZE(type_path_entry_t, path->path, 1);
3493 for ( ; designator != NULL; designator = designator->next) {
3494 type_path_entry_t *top = get_type_path_top(path);
3495 type_t *orig_type = top->type;
3496 type_t *type = skip_typeref(orig_type);
3498 if (designator->symbol != NULL) {
3499 assert(is_type_compound(type));
3501 symbol_t *symbol = designator->symbol;
3503 compound_t *compound = type->compound.compound;
3504 entity_t *iter = compound->members.entities;
3505 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3506 if (iter->base.symbol == symbol) {
3507 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3511 assert(iter != NULL);
3513 top->type = orig_type;
3514 top->compound_entry = iter;
3516 orig_type = iter->declaration.type;
3518 expression_t *array_index = designator->array_index;
3519 assert(designator->array_index != NULL);
3520 assert(is_type_array(type));
3522 long index = fold_constant(array_index);
3525 if (type->array.size_constant) {
3526 long array_size = type->array.size;
3527 assert(index < array_size);
3531 top->type = orig_type;
3532 top->index = (size_t) index;
3533 orig_type = type->array.element_type;
3535 path->top_type = orig_type;
3537 if (designator->next != NULL) {
3538 descend_into_subtype(path);
3542 path->invalid = false;
3545 static void advance_current_object(type_path_t *path)
3547 if (path->invalid) {
3548 /* TODO: handle this... */
3549 panic("invalid initializer in ast2firm (excessive elements)");
3552 type_path_entry_t *top = get_type_path_top(path);
3554 type_t *type = skip_typeref(top->type);
3555 if (is_type_union(type)) {
3556 top->compound_entry = NULL;
3557 } else if (is_type_struct(type)) {
3558 entity_t *entry = top->compound_entry;
3561 entry = entry->base.next;
3562 top->compound_entry = entry;
3563 if (entry != NULL) {
3564 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3565 path->top_type = entry->declaration.type;
3569 assert(is_type_array(type));
3572 if (!type->array.size_constant || top->index < type->array.size) {
3577 /* we're past the last member of the current sub-aggregate, try if we
3578 * can ascend in the type hierarchy and continue with another subobject */
3579 size_t len = ARR_LEN(path->path);
3582 ascend_from_subtype(path);
3583 advance_current_object(path);
3585 path->invalid = true;
3590 static ir_initializer_t *create_ir_initializer(
3591 const initializer_t *initializer, type_t *type);
3593 static ir_initializer_t *create_ir_initializer_value(
3594 const initializer_value_t *initializer)
3596 if (is_type_compound(initializer->value->base.type)) {
3597 panic("initializer creation for compounds not implemented yet");
3599 ir_node *value = expression_to_firm(initializer->value);
3600 return create_initializer_const(value);
3603 /** test wether type can be initialized by a string constant */
3604 static bool is_string_type(type_t *type)
3607 if (is_type_pointer(type)) {
3608 inner = skip_typeref(type->pointer.points_to);
3609 } else if(is_type_array(type)) {
3610 inner = skip_typeref(type->array.element_type);
3615 return is_type_integer(inner);
3618 static ir_initializer_t *create_ir_initializer_list(
3619 const initializer_list_t *initializer, type_t *type)
3622 memset(&path, 0, sizeof(path));
3623 path.top_type = type;
3624 path.path = NEW_ARR_F(type_path_entry_t, 0);
3626 descend_into_subtype(&path);
3628 for (size_t i = 0; i < initializer->len; ++i) {
3629 const initializer_t *sub_initializer = initializer->initializers[i];
3631 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3632 walk_designator(&path, sub_initializer->designator.designator);
3636 if (sub_initializer->kind == INITIALIZER_VALUE) {
3637 /* we might have to descend into types until we're at a scalar
3640 type_t *orig_top_type = path.top_type;
3641 type_t *top_type = skip_typeref(orig_top_type);
3643 if (is_type_scalar(top_type))
3645 descend_into_subtype(&path);
3647 } else if (sub_initializer->kind == INITIALIZER_STRING
3648 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3649 /* we might have to descend into types until we're at a scalar
3652 type_t *orig_top_type = path.top_type;
3653 type_t *top_type = skip_typeref(orig_top_type);
3655 if (is_string_type(top_type))
3657 descend_into_subtype(&path);
3661 ir_initializer_t *sub_irinitializer
3662 = create_ir_initializer(sub_initializer, path.top_type);
3664 size_t path_len = ARR_LEN(path.path);
3665 assert(path_len >= 1);
3666 type_path_entry_t *entry = & path.path[path_len-1];
3667 ir_initializer_t *tinitializer = entry->initializer;
3668 set_initializer_compound_value(tinitializer, entry->index,
3671 advance_current_object(&path);
3674 assert(ARR_LEN(path.path) >= 1);
3675 ir_initializer_t *result = path.path[0].initializer;
3676 DEL_ARR_F(path.path);
3681 static ir_initializer_t *create_ir_initializer_string(
3682 const initializer_string_t *initializer, type_t *type)
3684 type = skip_typeref(type);
3686 size_t string_len = initializer->string.size;
3687 assert(type->kind == TYPE_ARRAY);
3688 assert(type->array.size_constant);
3689 size_t len = type->array.size;
3690 ir_initializer_t *irinitializer = create_initializer_compound(len);
3692 const char *string = initializer->string.begin;
3693 ir_mode *mode = get_ir_mode(type->array.element_type);
3695 for (size_t i = 0; i < len; ++i) {
3700 tarval *tv = new_tarval_from_long(c, mode);
3701 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3703 set_initializer_compound_value(irinitializer, i, char_initializer);
3706 return irinitializer;
3709 static ir_initializer_t *create_ir_initializer_wide_string(
3710 const initializer_wide_string_t *initializer, type_t *type)
3712 size_t string_len = initializer->string.size;
3713 assert(type->kind == TYPE_ARRAY);
3714 assert(type->array.size_constant);
3715 size_t len = type->array.size;
3716 ir_initializer_t *irinitializer = create_initializer_compound(len);
3718 const wchar_rep_t *string = initializer->string.begin;
3719 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3721 for (size_t i = 0; i < len; ++i) {
3723 if (i < string_len) {
3726 tarval *tv = new_tarval_from_long(c, mode);
3727 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3729 set_initializer_compound_value(irinitializer, i, char_initializer);
3732 return irinitializer;
3735 static ir_initializer_t *create_ir_initializer(
3736 const initializer_t *initializer, type_t *type)
3738 switch(initializer->kind) {
3739 case INITIALIZER_STRING:
3740 return create_ir_initializer_string(&initializer->string, type);
3742 case INITIALIZER_WIDE_STRING:
3743 return create_ir_initializer_wide_string(&initializer->wide_string,
3746 case INITIALIZER_LIST:
3747 return create_ir_initializer_list(&initializer->list, type);
3749 case INITIALIZER_VALUE:
3750 return create_ir_initializer_value(&initializer->value);
3752 case INITIALIZER_DESIGNATOR:
3753 panic("unexpected designator initializer found");
3755 panic("unknown initializer");
3758 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3761 if (is_atomic_type(type)) {
3762 ir_mode *mode = get_type_mode(type);
3763 tarval *zero = get_mode_null(mode);
3764 ir_node *cnst = new_d_Const(dbgi, zero);
3766 /* TODO: bitfields */
3767 ir_node *mem = get_store();
3768 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3769 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3772 assert(is_compound_type(type));
3775 if (is_Array_type(type)) {
3776 assert(has_array_upper_bound(type, 0));
3777 n_members = get_array_upper_bound_int(type, 0);
3779 n_members = get_compound_n_members(type);
3782 for (int i = 0; i < n_members; ++i) {
3785 if (is_Array_type(type)) {
3786 ir_entity *entity = get_array_element_entity(type);
3787 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3788 ir_node *cnst = new_d_Const(dbgi, index_tv);
3789 ir_node *in[1] = { cnst };
3790 irtype = get_array_element_type(type);
3791 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3793 ir_entity *member = get_compound_member(type, i);
3795 irtype = get_entity_type(member);
3796 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3799 create_dynamic_null_initializer(irtype, dbgi, addr);
3804 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3805 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3807 switch(get_initializer_kind(initializer)) {
3808 case IR_INITIALIZER_NULL: {
3809 create_dynamic_null_initializer(type, dbgi, base_addr);
3812 case IR_INITIALIZER_CONST: {
3813 ir_node *node = get_initializer_const_value(initializer);
3814 ir_mode *mode = get_irn_mode(node);
3815 ir_type *ent_type = get_entity_type(entity);
3817 /* is it a bitfield type? */
3818 if (is_Primitive_type(ent_type) &&
3819 get_primitive_base_type(ent_type) != NULL) {
3820 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3824 assert(get_type_mode(type) == mode);
3825 ir_node *mem = get_store();
3826 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3827 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3831 case IR_INITIALIZER_TARVAL: {
3832 tarval *tv = get_initializer_tarval_value(initializer);
3833 ir_mode *mode = get_tarval_mode(tv);
3834 ir_node *cnst = new_d_Const(dbgi, tv);
3835 ir_type *ent_type = get_entity_type(entity);
3837 /* is it a bitfield type? */
3838 if (is_Primitive_type(ent_type) &&
3839 get_primitive_base_type(ent_type) != NULL) {
3840 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3844 assert(get_type_mode(type) == mode);
3845 ir_node *mem = get_store();
3846 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3847 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3851 case IR_INITIALIZER_COMPOUND: {
3852 assert(is_compound_type(type));
3854 if (is_Array_type(type)) {
3855 assert(has_array_upper_bound(type, 0));
3856 n_members = get_array_upper_bound_int(type, 0);
3858 n_members = get_compound_n_members(type);
3861 if (get_initializer_compound_n_entries(initializer)
3862 != (unsigned) n_members)
3863 panic("initializer doesn't match compound type");
3865 for (int i = 0; i < n_members; ++i) {
3868 ir_entity *sub_entity;
3869 if (is_Array_type(type)) {
3870 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3871 ir_node *cnst = new_d_Const(dbgi, index_tv);
3872 ir_node *in[1] = { cnst };
3873 irtype = get_array_element_type(type);
3874 sub_entity = get_array_element_entity(type);
3875 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3878 sub_entity = get_compound_member(type, i);
3879 irtype = get_entity_type(sub_entity);
3880 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3884 ir_initializer_t *sub_init
3885 = get_initializer_compound_value(initializer, i);
3887 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3894 panic("invalid IR_INITIALIZER found");
3897 static void create_dynamic_initializer(ir_initializer_t *initializer,
3898 dbg_info *dbgi, ir_entity *entity)
3900 ir_node *frame = get_local_frame(entity);
3901 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3902 ir_type *type = get_entity_type(entity);
3904 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3907 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3908 ir_entity *entity, type_t *type)
3910 ir_node *memory = get_store();
3911 ir_node *nomem = new_NoMem();
3912 ir_node *frame = get_irg_frame(current_ir_graph);
3913 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3915 if (initializer->kind == INITIALIZER_VALUE) {
3916 initializer_value_t *initializer_value = &initializer->value;
3918 ir_node *value = expression_to_firm(initializer_value->value);
3919 type = skip_typeref(type);
3920 assign_value(dbgi, addr, type, value);
3924 if (!is_constant_initializer(initializer)) {
3925 ir_initializer_t *irinitializer
3926 = create_ir_initializer(initializer, type);
3928 create_dynamic_initializer(irinitializer, dbgi, entity);
3932 /* create the ir_initializer */
3933 ir_graph *const old_current_ir_graph = current_ir_graph;
3934 current_ir_graph = get_const_code_irg();
3936 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3938 assert(current_ir_graph == get_const_code_irg());
3939 current_ir_graph = old_current_ir_graph;
3941 /* create a "template" entity which is copied to the entity on the stack */
3942 ident *const id = id_unique("initializer.%u");
3943 ir_type *const irtype = get_ir_type(type);
3944 ir_type *const global_type = get_glob_type();
3945 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3946 set_entity_ld_ident(init_entity, id);
3948 set_entity_variability(init_entity, variability_initialized);
3949 set_entity_visibility(init_entity, visibility_local);
3950 set_entity_allocation(init_entity, allocation_static);
3952 set_entity_initializer(init_entity, irinitializer);
3954 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3955 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3957 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3958 set_store(copyb_mem);
3961 static void create_initializer_local_variable_entity(entity_t *entity)
3963 assert(entity->kind == ENTITY_VARIABLE);
3964 initializer_t *initializer = entity->variable.initializer;
3965 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3966 ir_entity *irentity = entity->variable.v.entity;
3967 type_t *type = entity->declaration.type;
3968 create_local_initializer(initializer, dbgi, irentity, type);
3971 static void create_variable_initializer(entity_t *entity)
3973 assert(entity->kind == ENTITY_VARIABLE);
3974 initializer_t *initializer = entity->variable.initializer;
3975 if (initializer == NULL)
3978 declaration_kind_t declaration_kind
3979 = (declaration_kind_t) entity->declaration.kind;
3980 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3981 create_initializer_local_variable_entity(entity);
3985 type_t *type = entity->declaration.type;
3986 type_qualifiers_t tq = get_type_qualifier(type, true);
3988 if (initializer->kind == INITIALIZER_VALUE) {
3989 initializer_value_t *initializer_value = &initializer->value;
3990 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3992 ir_node *value = expression_to_firm(initializer_value->value);
3993 value = do_strict_conv(dbgi, value);
3995 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3996 set_value(entity->variable.v.value_number, value);
3998 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4000 ir_entity *irentity = entity->variable.v.entity;
4002 if (tq & TYPE_QUALIFIER_CONST) {
4003 set_entity_variability(irentity, variability_constant);
4005 set_entity_variability(irentity, variability_initialized);
4007 set_atomic_ent_value(irentity, value);
4010 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4011 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4013 ir_entity *irentity = entity->variable.v.entity;
4014 ir_initializer_t *irinitializer
4015 = create_ir_initializer(initializer, type);
4017 if (tq & TYPE_QUALIFIER_CONST) {
4018 set_entity_variability(irentity, variability_constant);
4020 set_entity_variability(irentity, variability_initialized);
4022 set_entity_initializer(irentity, irinitializer);
4026 static void create_variable_length_array(entity_t *entity)
4028 assert(entity->kind == ENTITY_VARIABLE);
4029 assert(entity->variable.initializer == NULL);
4031 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4032 entity->variable.v.vla_base = NULL;
4034 /* TODO: record VLA somewhere so we create the free node when we leave
4038 static void allocate_variable_length_array(entity_t *entity)
4040 assert(entity->kind == ENTITY_VARIABLE);
4041 assert(entity->variable.initializer == NULL);
4042 assert(get_cur_block() != NULL);
4044 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4045 type_t *type = entity->declaration.type;
4046 ir_type *el_type = get_ir_type(type->array.element_type);
4048 /* make sure size_node is calculated */
4049 get_type_size(type);
4050 ir_node *elems = type->array.size_node;
4051 ir_node *mem = get_store();
4052 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4054 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4055 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4058 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4059 entity->variable.v.vla_base = addr;
4063 * Creates a Firm local variable from a declaration.
4065 static void create_local_variable(entity_t *entity)
4067 assert(entity->kind == ENTITY_VARIABLE);
4068 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4070 bool needs_entity = entity->variable.address_taken;
4071 type_t *type = skip_typeref(entity->declaration.type);
4073 /* is it a variable length array? */
4074 if (is_type_array(type) && !type->array.size_constant) {
4075 create_variable_length_array(entity);
4077 } else if (is_type_array(type) || is_type_compound(type)) {
4078 needs_entity = true;
4079 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4080 needs_entity = true;
4084 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4085 create_variable_entity(entity,
4086 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4089 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4090 entity->variable.v.value_number = next_value_number_function;
4091 set_irg_loc_description(current_ir_graph, next_value_number_function,
4093 ++next_value_number_function;
4097 static void create_local_static_variable(entity_t *entity)
4099 assert(entity->kind == ENTITY_VARIABLE);
4100 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4102 type_t *const type = skip_typeref(entity->declaration.type);
4103 ir_type *const var_type = entity->variable.thread_local ?
4104 get_tls_type() : get_glob_type();
4105 ir_type *const irtype = get_ir_type(type);
4106 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4108 size_t l = strlen(entity->base.symbol->string);
4109 char buf[l + sizeof(".%u")];
4110 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4111 ident *const id = id_unique(buf);
4113 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4115 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4116 set_entity_volatility(irentity, volatility_is_volatile);
4119 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4120 entity->variable.v.entity = irentity;
4121 set_entity_ld_ident(irentity, id);
4122 set_entity_variability(irentity, variability_uninitialized);
4123 set_entity_visibility(irentity, visibility_local);
4124 set_entity_allocation(irentity, entity->variable.thread_local ?
4125 allocation_automatic : allocation_static);
4127 ir_graph *const old_current_ir_graph = current_ir_graph;
4128 current_ir_graph = get_const_code_irg();
4130 create_variable_initializer(entity);
4132 assert(current_ir_graph == get_const_code_irg());
4133 current_ir_graph = old_current_ir_graph;
4138 static void return_statement_to_firm(return_statement_t *statement)
4140 if (get_cur_block() == NULL)
4143 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4144 type_t *type = current_function_entity->declaration.type;
4145 ir_type *func_irtype = get_ir_type(type);
4150 if (get_method_n_ress(func_irtype) > 0) {
4151 ir_type *res_type = get_method_res_type(func_irtype, 0);
4153 if (statement->value != NULL) {
4154 ir_node *node = expression_to_firm(statement->value);
4155 node = do_strict_conv(dbgi, node);
4159 if (is_compound_type(res_type)) {
4162 mode = get_type_mode(res_type);
4164 in[0] = new_Unknown(mode);
4168 /* build return_value for its side effects */
4169 if (statement->value != NULL) {
4170 expression_to_firm(statement->value);
4175 ir_node *store = get_store();
4176 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4178 ir_node *end_block = get_irg_end_block(current_ir_graph);
4179 add_immBlock_pred(end_block, ret);
4181 set_cur_block(NULL);
4184 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4186 if (get_cur_block() == NULL)
4189 return expression_to_firm(statement->expression);
4192 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4194 entity_t *entity = compound->scope.entities;
4195 for ( ; entity != NULL; entity = entity->base.next) {
4196 if (!is_declaration(entity))
4199 create_local_declaration(entity);
4202 ir_node *result = NULL;
4203 statement_t *statement = compound->statements;
4204 for ( ; statement != NULL; statement = statement->base.next) {
4205 if (statement->base.next == NULL
4206 && statement->kind == STATEMENT_EXPRESSION) {
4207 result = expression_statement_to_firm(
4208 &statement->expression);
4211 statement_to_firm(statement);
4217 static void create_global_variable(entity_t *entity)
4219 assert(entity->kind == ENTITY_VARIABLE);
4222 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4223 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4224 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4225 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4227 default: panic("Invalid storage class for global variable");
4230 ir_type *var_type = entity->variable.thread_local ?
4231 get_tls_type() : get_glob_type();
4232 create_variable_entity(entity,
4233 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4234 set_entity_visibility(entity->variable.v.entity, vis);
4237 static void create_local_declaration(entity_t *entity)
4239 assert(is_declaration(entity));
4241 /* construct type */
4242 (void) get_ir_type(entity->declaration.type);
4243 if (entity->base.symbol == NULL) {
4247 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4248 case STORAGE_CLASS_STATIC:
4249 create_local_static_variable(entity);
4251 case STORAGE_CLASS_EXTERN:
4252 if (entity->kind == ENTITY_FUNCTION) {
4253 assert(entity->function.statement == NULL);
4254 get_function_entity(entity);
4256 create_global_variable(entity);
4257 create_variable_initializer(entity);
4260 case STORAGE_CLASS_NONE:
4261 case STORAGE_CLASS_AUTO:
4262 case STORAGE_CLASS_REGISTER:
4263 if (entity->kind == ENTITY_FUNCTION) {
4264 if (entity->function.statement != NULL) {
4265 get_function_entity(entity);
4266 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4267 enqueue_inner_function(entity);
4269 get_function_entity(entity);
4272 create_local_variable(entity);
4275 case STORAGE_CLASS_TYPEDEF:
4278 panic("invalid storage class found");
4281 static void initialize_local_declaration(entity_t *entity)
4283 if (entity->base.symbol == NULL)
4286 switch ((declaration_kind_t) entity->declaration.kind) {
4287 case DECLARATION_KIND_LOCAL_VARIABLE:
4288 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4289 create_variable_initializer(entity);
4292 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4293 allocate_variable_length_array(entity);
4296 case DECLARATION_KIND_COMPOUND_MEMBER:
4297 case DECLARATION_KIND_GLOBAL_VARIABLE:
4298 case DECLARATION_KIND_FUNCTION:
4299 case DECLARATION_KIND_INNER_FUNCTION:
4302 case DECLARATION_KIND_PARAMETER:
4303 case DECLARATION_KIND_PARAMETER_ENTITY:
4304 panic("can't initialize parameters");
4306 case DECLARATION_KIND_UNKNOWN:
4307 panic("can't initialize unknown declaration");
4309 panic("invalid declaration kind");
4312 static void declaration_statement_to_firm(declaration_statement_t *statement)
4314 entity_t * entity = statement->declarations_begin;
4315 entity_t *const last = statement->declarations_end;
4316 if (entity != NULL) {
4317 for ( ;; entity = entity->base.next) {
4318 if (is_declaration(entity))
4319 initialize_local_declaration(entity);
4326 static void if_statement_to_firm(if_statement_t *statement)
4328 ir_node *cur_block = get_cur_block();
4330 ir_node *fallthrough_block = NULL;
4332 /* the true (blocks) */
4333 ir_node *true_block = NULL;
4334 if (statement->true_statement != NULL) {
4335 true_block = new_immBlock();
4336 statement_to_firm(statement->true_statement);
4337 if (get_cur_block() != NULL) {
4338 ir_node *jmp = new_Jmp();
4339 if (fallthrough_block == NULL)
4340 fallthrough_block = new_immBlock();
4341 add_immBlock_pred(fallthrough_block, jmp);
4345 /* the false (blocks) */
4346 ir_node *false_block = NULL;
4347 if (statement->false_statement != NULL) {
4348 false_block = new_immBlock();
4350 statement_to_firm(statement->false_statement);
4351 if (get_cur_block() != NULL) {
4352 ir_node *jmp = new_Jmp();
4353 if (fallthrough_block == NULL)
4354 fallthrough_block = new_immBlock();
4355 add_immBlock_pred(fallthrough_block, jmp);
4359 /* create the condition */
4360 if (cur_block != NULL) {
4361 if (true_block == NULL || false_block == NULL) {
4362 if (fallthrough_block == NULL)
4363 fallthrough_block = new_immBlock();
4364 if (true_block == NULL)
4365 true_block = fallthrough_block;
4366 if (false_block == NULL)
4367 false_block = fallthrough_block;
4370 set_cur_block(cur_block);
4371 create_condition_evaluation(statement->condition, true_block,
4375 mature_immBlock(true_block);
4376 if (false_block != fallthrough_block && false_block != NULL) {
4377 mature_immBlock(false_block);
4379 if (fallthrough_block != NULL) {
4380 mature_immBlock(fallthrough_block);
4383 set_cur_block(fallthrough_block);
4386 static void while_statement_to_firm(while_statement_t *statement)
4388 ir_node *jmp = NULL;
4389 if (get_cur_block() != NULL) {
4393 /* create the header block */
4394 ir_node *header_block = new_immBlock();
4396 add_immBlock_pred(header_block, jmp);
4400 ir_node *old_continue_label = continue_label;
4401 ir_node *old_break_label = break_label;
4402 continue_label = header_block;
4405 ir_node *body_block = new_immBlock();
4406 statement_to_firm(statement->body);
4407 ir_node *false_block = break_label;
4409 assert(continue_label == header_block);
4410 continue_label = old_continue_label;
4411 break_label = old_break_label;
4413 if (get_cur_block() != NULL) {
4415 add_immBlock_pred(header_block, jmp);
4418 /* shortcut for while(true) */
4419 if (is_constant_expression(statement->condition)
4420 && fold_constant(statement->condition) != 0) {
4421 set_cur_block(header_block);
4422 ir_node *header_jmp = new_Jmp();
4423 add_immBlock_pred(body_block, header_jmp);
4425 keep_alive(body_block);
4426 keep_all_memory(body_block);
4427 set_cur_block(body_block);
4429 if (false_block == NULL) {
4430 false_block = new_immBlock();
4433 /* create the condition */
4434 set_cur_block(header_block);
4436 create_condition_evaluation(statement->condition, body_block,
4440 mature_immBlock(body_block);
4441 mature_immBlock(header_block);
4442 if (false_block != NULL) {
4443 mature_immBlock(false_block);
4446 set_cur_block(false_block);
4449 static void do_while_statement_to_firm(do_while_statement_t *statement)
4451 ir_node *jmp = NULL;
4452 if (get_cur_block() != NULL) {
4456 /* create the header block */
4457 ir_node *header_block = new_immBlock();
4460 ir_node *body_block = new_immBlock();
4462 add_immBlock_pred(body_block, jmp);
4465 ir_node *old_continue_label = continue_label;
4466 ir_node *old_break_label = break_label;
4467 continue_label = header_block;
4470 statement_to_firm(statement->body);
4471 ir_node *false_block = break_label;
4473 assert(continue_label == header_block);
4474 continue_label = old_continue_label;
4475 break_label = old_break_label;
4477 if (get_cur_block() != NULL) {
4478 ir_node *body_jmp = new_Jmp();
4479 add_immBlock_pred(header_block, body_jmp);
4480 mature_immBlock(header_block);
4483 if (false_block == NULL) {
4484 false_block = new_immBlock();
4487 /* create the condition */
4488 set_cur_block(header_block);
4490 create_condition_evaluation(statement->condition, body_block, false_block);
4491 mature_immBlock(body_block);
4492 mature_immBlock(header_block);
4493 if (false_block != NULL) {
4494 mature_immBlock(false_block);
4497 set_cur_block(false_block);
4500 static void for_statement_to_firm(for_statement_t *statement)
4502 ir_node *jmp = NULL;
4504 /* create declarations */
4505 entity_t *entity = statement->scope.entities;
4506 for ( ; entity != NULL; entity = entity->base.next) {
4507 if (!is_declaration(entity))
4510 create_local_declaration(entity);
4513 if (get_cur_block() != NULL) {
4514 entity = statement->scope.entities;
4515 for ( ; entity != NULL; entity = entity->base.next) {
4516 if (!is_declaration(entity))
4519 initialize_local_declaration(entity);
4522 if (statement->initialisation != NULL) {
4523 expression_to_firm(statement->initialisation);
4530 /* create the step block */
4531 ir_node *const step_block = new_immBlock();
4532 if (statement->step != NULL) {
4533 expression_to_firm(statement->step);
4535 ir_node *const step_jmp = new_Jmp();
4537 /* create the header block */
4538 ir_node *const header_block = new_immBlock();
4540 add_immBlock_pred(header_block, jmp);
4542 add_immBlock_pred(header_block, step_jmp);
4544 /* the false block */
4545 ir_node *const false_block = new_immBlock();
4548 ir_node * body_block;
4549 if (statement->body != NULL) {
4550 ir_node *const old_continue_label = continue_label;
4551 ir_node *const old_break_label = break_label;
4552 continue_label = step_block;
4553 break_label = false_block;
4555 body_block = new_immBlock();
4556 statement_to_firm(statement->body);
4558 assert(continue_label == step_block);
4559 assert(break_label == false_block);
4560 continue_label = old_continue_label;
4561 break_label = old_break_label;
4563 if (get_cur_block() != NULL) {
4565 add_immBlock_pred(step_block, jmp);
4568 body_block = step_block;
4571 /* create the condition */
4572 set_cur_block(header_block);
4573 if (statement->condition != NULL) {
4574 create_condition_evaluation(statement->condition, body_block,
4577 keep_alive(header_block);
4578 keep_all_memory(header_block);
4580 add_immBlock_pred(body_block, jmp);
4583 mature_immBlock(body_block);
4584 mature_immBlock(false_block);
4585 mature_immBlock(step_block);
4586 mature_immBlock(header_block);
4587 mature_immBlock(false_block);
4589 set_cur_block(false_block);
4592 static void create_jump_statement(const statement_t *statement,
4593 ir_node *target_block)
4595 if (get_cur_block() == NULL)
4598 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4599 ir_node *jump = new_d_Jmp(dbgi);
4600 add_immBlock_pred(target_block, jump);
4602 set_cur_block(NULL);
4605 static ir_node *get_break_label(void)
4607 if (break_label == NULL) {
4608 ir_node *cur_block = get_cur_block();
4609 break_label = new_immBlock();
4610 set_cur_block(cur_block);
4615 static void switch_statement_to_firm(switch_statement_t *statement)
4617 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4619 ir_node *expression = expression_to_firm(statement->expression);
4620 ir_node *cond = new_d_Cond(dbgi, expression);
4622 set_cur_block(NULL);
4624 ir_node *const old_switch_cond = current_switch_cond;
4625 ir_node *const old_break_label = break_label;
4626 const bool old_saw_default_label = saw_default_label;
4627 saw_default_label = false;
4628 current_switch_cond = cond;
4630 switch_statement_t *const old_switch = current_switch;
4631 current_switch = statement;
4633 /* determine a free number for the default label */
4634 unsigned long num_cases = 0;
4636 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4637 if (l->expression == NULL) {
4641 if (l->last_case >= l->first_case)
4642 num_cases += l->last_case - l->first_case + 1;
4643 if (l->last_case > def_nr)
4644 def_nr = l->last_case;
4647 if (def_nr == INT_MAX) {
4648 /* Bad: an overflow will occurr, we cannot be sure that the
4649 * maximum + 1 is a free number. Scan the values a second
4650 * time to find a free number.
4652 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4654 memset(bits, 0, (num_cases + 7) >> 3);
4655 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4656 if (l->expression == NULL) {
4660 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4661 if (start < num_cases && l->last_case >= 0) {
4662 unsigned long end = (unsigned long)l->last_case < num_cases ?
4663 (unsigned long)l->last_case : num_cases - 1;
4664 for (unsigned long cns = start; cns <= end; ++cns) {
4665 bits[cns >> 3] |= (1 << (cns & 7));
4669 /* We look at the first num_cases constants:
4670 * Either they are densed, so we took the last (num_cases)
4671 * one, or they are non densed, so we will find one free
4675 for (i = 0; i < num_cases; ++i)
4676 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4684 statement->default_proj_nr = def_nr;
4686 if (statement->body != NULL) {
4687 statement_to_firm(statement->body);
4690 if (get_cur_block() != NULL) {
4691 ir_node *jmp = new_Jmp();
4692 add_immBlock_pred(get_break_label(), jmp);
4695 if (!saw_default_label) {
4696 set_cur_block(get_nodes_block(cond));
4697 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4698 statement->default_proj_nr);
4699 add_immBlock_pred(get_break_label(), proj);
4702 if (break_label != NULL) {
4703 mature_immBlock(break_label);
4705 set_cur_block(break_label);
4707 assert(current_switch_cond == cond);
4708 current_switch = old_switch;
4709 current_switch_cond = old_switch_cond;
4710 break_label = old_break_label;
4711 saw_default_label = old_saw_default_label;
4714 static void case_label_to_firm(const case_label_statement_t *statement)
4716 if (statement->is_empty_range)
4719 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4721 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4724 ir_node *old_block = get_nodes_block(current_switch_cond);
4725 ir_node *block = new_immBlock();
4727 set_cur_block(old_block);
4728 if (statement->expression != NULL) {
4729 long pn = statement->first_case;
4730 long end_pn = statement->last_case;
4731 assert(pn <= end_pn);
4732 /* create jumps for all cases in the given range */
4734 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4735 add_immBlock_pred(block, proj);
4736 } while(pn++ < end_pn);
4738 saw_default_label = true;
4739 proj = new_d_defaultProj(dbgi, current_switch_cond,
4740 current_switch->default_proj_nr);
4742 add_immBlock_pred(block, proj);
4745 if (fallthrough != NULL) {
4746 add_immBlock_pred(block, fallthrough);
4748 mature_immBlock(block);
4749 set_cur_block(block);
4751 if (statement->statement != NULL) {
4752 statement_to_firm(statement->statement);
4756 static void label_to_firm(const label_statement_t *statement)
4758 ir_node *block = get_label_block(statement->label);
4760 if (get_cur_block() != NULL) {
4761 ir_node *jmp = new_Jmp();
4762 add_immBlock_pred(block, jmp);
4765 set_cur_block(block);
4767 keep_all_memory(block);
4769 if (statement->statement != NULL) {
4770 statement_to_firm(statement->statement);
4774 static void goto_to_firm(const goto_statement_t *statement)
4776 if (get_cur_block() == NULL)
4779 if (statement->expression) {
4780 ir_node *irn = expression_to_firm(statement->expression);
4781 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4782 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4784 set_irn_link(ijmp, ijmp_list);
4787 ir_node *block = get_label_block(statement->label);
4788 ir_node *jmp = new_Jmp();
4789 add_immBlock_pred(block, jmp);
4791 set_cur_block(NULL);
4794 static void asm_statement_to_firm(const asm_statement_t *statement)
4796 bool needs_memory = false;
4798 if (statement->is_volatile) {
4799 needs_memory = true;
4802 size_t n_clobbers = 0;
4803 asm_clobber_t *clobber = statement->clobbers;
4804 for ( ; clobber != NULL; clobber = clobber->next) {
4805 const char *clobber_str = clobber->clobber.begin;
4807 if (!be_is_valid_clobber(clobber_str)) {
4808 errorf(&statement->base.source_position,
4809 "invalid clobber '%s' specified", clobber->clobber);
4813 if (strcmp(clobber_str, "memory") == 0) {
4814 needs_memory = true;
4818 ident *id = new_id_from_str(clobber_str);
4819 obstack_ptr_grow(&asm_obst, id);
4822 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4823 ident **clobbers = NULL;
4824 if (n_clobbers > 0) {
4825 clobbers = obstack_finish(&asm_obst);
4828 size_t n_inputs = 0;
4829 asm_argument_t *argument = statement->inputs;
4830 for ( ; argument != NULL; argument = argument->next)
4832 size_t n_outputs = 0;
4833 argument = statement->outputs;
4834 for ( ; argument != NULL; argument = argument->next)
4837 unsigned next_pos = 0;
4839 ir_node *ins[n_inputs + n_outputs + 1];
4842 ir_asm_constraint tmp_in_constraints[n_outputs];
4844 const expression_t *out_exprs[n_outputs];
4845 ir_node *out_addrs[n_outputs];
4846 size_t out_size = 0;
4848 argument = statement->outputs;
4849 for ( ; argument != NULL; argument = argument->next) {
4850 const char *constraints = argument->constraints.begin;
4851 asm_constraint_flags_t asm_flags
4852 = be_parse_asm_constraints(constraints);
4854 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4855 warningf(&statement->base.source_position,
4856 "some constraints in '%s' are not supported", constraints);
4858 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4859 errorf(&statement->base.source_position,
4860 "some constraints in '%s' are invalid", constraints);
4863 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4864 errorf(&statement->base.source_position,
4865 "no write flag specified for output constraints '%s'",
4870 unsigned pos = next_pos++;
4871 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4872 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4873 expression_t *expr = argument->expression;
4874 ir_node *addr = expression_to_addr(expr);
4875 /* in+output, construct an artifical same_as constraint on the
4877 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4879 ir_node *value = get_value_from_lvalue(expr, addr);
4881 snprintf(buf, sizeof(buf), "%u", pos);
4883 ir_asm_constraint constraint;
4884 constraint.pos = pos;
4885 constraint.constraint = new_id_from_str(buf);
4886 constraint.mode = get_ir_mode(expr->base.type);
4887 tmp_in_constraints[in_size] = constraint;
4888 ins[in_size] = value;
4893 out_exprs[out_size] = expr;
4894 out_addrs[out_size] = addr;
4896 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4897 /* pure memory ops need no input (but we have to make sure we
4898 * attach to the memory) */
4899 assert(! (asm_flags &
4900 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4901 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4902 needs_memory = true;
4904 /* we need to attach the address to the inputs */
4905 expression_t *expr = argument->expression;
4907 ir_asm_constraint constraint;
4908 constraint.pos = pos;
4909 constraint.constraint = new_id_from_str(constraints);
4910 constraint.mode = NULL;
4911 tmp_in_constraints[in_size] = constraint;
4913 ins[in_size] = expression_to_addr(expr);
4917 errorf(&statement->base.source_position,
4918 "only modifiers but no place set in constraints '%s'",
4923 ir_asm_constraint constraint;
4924 constraint.pos = pos;
4925 constraint.constraint = new_id_from_str(constraints);
4926 constraint.mode = get_ir_mode(argument->expression->base.type);
4928 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4930 assert(obstack_object_size(&asm_obst)
4931 == out_size * sizeof(ir_asm_constraint));
4932 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4935 obstack_grow(&asm_obst, tmp_in_constraints,
4936 in_size * sizeof(tmp_in_constraints[0]));
4937 /* find and count input and output arguments */
4938 argument = statement->inputs;
4939 for ( ; argument != NULL; argument = argument->next) {
4940 const char *constraints = argument->constraints.begin;
4941 asm_constraint_flags_t asm_flags
4942 = be_parse_asm_constraints(constraints);
4944 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4945 errorf(&statement->base.source_position,
4946 "some constraints in '%s' are not supported", constraints);
4949 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4950 errorf(&statement->base.source_position,
4951 "some constraints in '%s' are invalid", constraints);
4954 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4955 errorf(&statement->base.source_position,
4956 "write flag specified for input constraints '%s'",
4962 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4963 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4964 /* we can treat this as "normal" input */
4965 input = expression_to_firm(argument->expression);
4966 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4967 /* pure memory ops need no input (but we have to make sure we
4968 * attach to the memory) */
4969 assert(! (asm_flags &
4970 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4971 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4972 needs_memory = true;
4973 input = expression_to_addr(argument->expression);
4975 errorf(&statement->base.source_position,
4976 "only modifiers but no place set in constraints '%s'",
4981 ir_asm_constraint constraint;
4982 constraint.pos = next_pos++;
4983 constraint.constraint = new_id_from_str(constraints);
4984 constraint.mode = get_irn_mode(input);
4986 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4987 ins[in_size++] = input;
4991 ir_asm_constraint constraint;
4992 constraint.pos = next_pos++;
4993 constraint.constraint = new_id_from_str("");
4994 constraint.mode = mode_M;
4996 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4997 ins[in_size++] = get_store();
5000 assert(obstack_object_size(&asm_obst)
5001 == in_size * sizeof(ir_asm_constraint));
5002 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5004 /* create asm node */
5005 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5007 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5009 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5010 out_size, output_constraints,
5011 n_clobbers, clobbers, asm_text);
5013 if (statement->is_volatile) {
5014 set_irn_pinned(node, op_pin_state_pinned);
5016 set_irn_pinned(node, op_pin_state_floats);
5019 /* create output projs & connect them */
5021 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5026 for (i = 0; i < out_size; ++i) {
5027 const expression_t *out_expr = out_exprs[i];
5029 ir_mode *mode = get_ir_mode(out_expr->base.type);
5030 ir_node *proj = new_Proj(node, mode, pn);
5031 ir_node *addr = out_addrs[i];
5033 set_value_for_expression_addr(out_expr, proj, addr);
5037 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5038 statement_to_firm(statement->try_statement);
5039 warningf(&statement->base.source_position, "structured exception handling ignored");
5042 static void leave_statement_to_firm(leave_statement_t *statement) {
5043 errorf(&statement->base.source_position, "__leave not supported yet");
5047 * Transform a statement.
5049 static void statement_to_firm(statement_t *statement)
5052 assert(!statement->base.transformed);
5053 statement->base.transformed = true;
5056 switch (statement->kind) {
5057 case STATEMENT_INVALID:
5058 panic("invalid statement found");
5059 case STATEMENT_EMPTY:
5062 case STATEMENT_COMPOUND:
5063 compound_statement_to_firm(&statement->compound);
5065 case STATEMENT_RETURN:
5066 return_statement_to_firm(&statement->returns);
5068 case STATEMENT_EXPRESSION:
5069 expression_statement_to_firm(&statement->expression);
5072 if_statement_to_firm(&statement->ifs);
5074 case STATEMENT_WHILE:
5075 while_statement_to_firm(&statement->whiles);
5077 case STATEMENT_DO_WHILE:
5078 do_while_statement_to_firm(&statement->do_while);
5080 case STATEMENT_DECLARATION:
5081 declaration_statement_to_firm(&statement->declaration);
5083 case STATEMENT_BREAK:
5084 create_jump_statement(statement, get_break_label());
5086 case STATEMENT_CONTINUE:
5087 create_jump_statement(statement, continue_label);
5089 case STATEMENT_SWITCH:
5090 switch_statement_to_firm(&statement->switchs);
5092 case STATEMENT_CASE_LABEL:
5093 case_label_to_firm(&statement->case_label);
5096 for_statement_to_firm(&statement->fors);
5098 case STATEMENT_LABEL:
5099 label_to_firm(&statement->label);
5101 case STATEMENT_LOCAL_LABEL:
5102 /* local labels transform the semantics of labels while parsing
5103 * they don't need any special treatment here */
5105 case STATEMENT_GOTO:
5106 goto_to_firm(&statement->gotos);
5109 asm_statement_to_firm(&statement->asms);
5111 case STATEMENT_MS_TRY:
5112 ms_try_statement_to_firm(&statement->ms_try);
5114 case STATEMENT_LEAVE:
5115 leave_statement_to_firm(&statement->leave);
5118 panic("Statement not implemented\n");
5121 static int count_local_variables(const entity_t *entity,
5122 const entity_t *const last)
5125 for (; entity != NULL; entity = entity->base.next) {
5129 if (entity->kind == ENTITY_VARIABLE) {
5130 type = skip_typeref(entity->declaration.type);
5131 address_taken = entity->variable.address_taken;
5132 } else if (entity->kind == ENTITY_PARAMETER) {
5133 type = skip_typeref(entity->declaration.type);
5134 address_taken = entity->parameter.address_taken;
5139 if (!address_taken && is_type_scalar(type))
5148 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5150 int *const count = env;
5152 switch (stmt->kind) {
5153 case STATEMENT_DECLARATION: {
5154 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5155 *count += count_local_variables(decl_stmt->declarations_begin,
5156 decl_stmt->declarations_end);
5161 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5169 static int get_function_n_local_vars(entity_t *entity)
5173 /* count parameters */
5174 count += count_local_variables(entity->function.parameters.entities, NULL);
5176 /* count local variables declared in body */
5177 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5182 static void initialize_function_parameters(entity_t *entity)
5184 assert(entity->kind == ENTITY_FUNCTION);
5185 ir_graph *irg = current_ir_graph;
5186 ir_node *args = get_irg_args(irg);
5187 ir_node *start_block = get_irg_start_block(irg);
5188 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5191 entity_t *parameter = entity->function.parameters.entities;
5192 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5193 assert(parameter->kind == ENTITY_PARAMETER);
5194 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5195 type_t *type = skip_typeref(parameter->declaration.type);
5197 bool needs_entity = parameter->parameter.address_taken;
5198 assert(!is_type_array(type));
5199 if (is_type_compound(type)) {
5200 needs_entity = true;
5204 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5205 ident *id = new_id_from_str(parameter->base.symbol->string);
5206 set_entity_ident(entity, id);
5208 parameter->declaration.kind
5209 = DECLARATION_KIND_PARAMETER_ENTITY;
5210 parameter->parameter.v.entity = entity;
5214 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5215 ir_mode *param_mode = get_type_mode(param_irtype);
5218 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5220 ir_mode *mode = get_ir_mode(type);
5221 value = create_conv(NULL, value, mode);
5222 value = do_strict_conv(NULL, value);
5224 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5225 parameter->parameter.v.value_number = next_value_number_function;
5226 set_irg_loc_description(current_ir_graph, next_value_number_function,
5228 ++next_value_number_function;
5230 set_value(parameter->parameter.v.value_number, value);
5235 * Handle additional decl modifiers for IR-graphs
5237 * @param irg the IR-graph
5238 * @param dec_modifiers additional modifiers
5240 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5242 if (decl_modifiers & DM_NORETURN) {
5243 /* TRUE if the declaration includes the Microsoft
5244 __declspec(noreturn) specifier. */
5245 set_irg_additional_property(irg, mtp_property_noreturn);
5247 if (decl_modifiers & DM_NOTHROW) {
5248 /* TRUE if the declaration includes the Microsoft
5249 __declspec(nothrow) specifier. */
5250 set_irg_additional_property(irg, mtp_property_nothrow);
5252 if (decl_modifiers & DM_NAKED) {
5253 /* TRUE if the declaration includes the Microsoft
5254 __declspec(naked) specifier. */
5255 set_irg_additional_property(irg, mtp_property_naked);
5257 if (decl_modifiers & DM_FORCEINLINE) {
5258 /* TRUE if the declaration includes the
5259 Microsoft __forceinline specifier. */
5260 set_irg_inline_property(irg, irg_inline_forced);
5262 if (decl_modifiers & DM_NOINLINE) {
5263 /* TRUE if the declaration includes the Microsoft
5264 __declspec(noinline) specifier. */
5265 set_irg_inline_property(irg, irg_inline_forbidden);
5269 static void add_function_pointer(ir_type *segment, ir_entity *method,
5270 const char *unique_template)
5272 ir_type *method_type = get_entity_type(method);
5273 ident *id = id_unique(unique_template);
5274 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5276 ident *ide = id_unique(unique_template);
5277 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5278 ir_graph *irg = get_const_code_irg();
5279 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5282 set_entity_compiler_generated(ptr, 1);
5283 set_entity_variability(ptr, variability_constant);
5284 set_atomic_ent_value(ptr, val);
5288 * Generate possible IJmp branches to a given label block.
5290 static void gen_ijmp_branches(ir_node *block) {
5292 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5293 add_immBlock_pred(block, ijmp);
5298 * Create code for a function.
5300 static void create_function(entity_t *entity)
5302 assert(entity->kind == ENTITY_FUNCTION);
5303 ir_entity *function_entity = get_function_entity(entity);
5305 if (entity->function.statement == NULL)
5308 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5309 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5310 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5312 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5313 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5314 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5317 current_function_entity = entity;
5318 current_function_name = NULL;
5319 current_funcsig = NULL;
5321 assert(all_labels == NULL);
5322 all_labels = NEW_ARR_F(label_t *, 0);
5325 int n_local_vars = get_function_n_local_vars(entity);
5326 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5328 ir_graph *old_current_function = current_function;
5329 current_function = irg;
5331 set_irg_fp_model(irg, firm_opt.fp_model);
5332 tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5333 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5335 ir_node *first_block = get_cur_block();
5337 /* set inline flags */
5338 if (entity->function.is_inline)
5339 set_irg_inline_property(irg, irg_inline_recomended);
5340 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5342 next_value_number_function = 0;
5343 initialize_function_parameters(entity);
5345 statement_to_firm(entity->function.statement);
5347 ir_node *end_block = get_irg_end_block(irg);
5349 /* do we have a return statement yet? */
5350 if (get_cur_block() != NULL) {
5351 type_t *type = skip_typeref(entity->declaration.type);
5352 assert(is_type_function(type));
5353 const function_type_t *func_type = &type->function;
5354 const type_t *return_type
5355 = skip_typeref(func_type->return_type);
5358 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5359 ret = new_Return(get_store(), 0, NULL);
5362 if (is_type_scalar(return_type)) {
5363 mode = get_ir_mode(func_type->return_type);
5369 /* ยง5.1.2.2.3 main implicitly returns 0 */
5370 if (is_main(entity)) {
5371 in[0] = new_Const(get_mode_null(mode));
5373 in[0] = new_Unknown(mode);
5375 ret = new_Return(get_store(), 1, in);
5377 add_immBlock_pred(end_block, ret);
5380 bool has_computed_gotos = false;
5381 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5382 label_t *label = all_labels[i];
5383 if (label->address_taken) {
5384 gen_ijmp_branches(label->block);
5385 has_computed_gotos = true;
5387 mature_immBlock(label->block);
5389 if (has_computed_gotos) {
5390 /* if we have computed goto's in the function, we cannot inline it */
5391 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5392 warningf(&entity->base.source_position,
5393 "function '%Y' can never be inlined because it contains a computed goto",
5394 entity->base.symbol);
5396 set_irg_inline_property(irg, irg_inline_forbidden);
5399 DEL_ARR_F(all_labels);
5402 mature_immBlock(first_block);
5403 mature_immBlock(end_block);
5405 irg_finalize_cons(irg);
5407 /* finalize the frame type */
5408 ir_type *frame_type = get_irg_frame_type(irg);
5409 int n = get_compound_n_members(frame_type);
5412 for (int i = 0; i < n; ++i) {
5413 ir_entity *entity = get_compound_member(frame_type, i);
5414 ir_type *entity_type = get_entity_type(entity);
5416 int align = get_type_alignment_bytes(entity_type);
5417 if (align > align_all)
5421 misalign = offset % align;
5423 offset += align - misalign;
5427 set_entity_offset(entity, offset);
5428 offset += get_type_size_bytes(entity_type);
5430 set_type_size_bytes(frame_type, offset);
5431 set_type_alignment_bytes(frame_type, align_all);
5434 current_function = old_current_function;
5436 /* create inner functions */
5438 for (inner = next_inner_function(); inner != NULL;
5439 inner = next_inner_function()) {
5440 create_function(inner);
5444 static void scope_to_firm(scope_t *scope)
5446 /* first pass: create declarations */
5447 entity_t *entity = scope->entities;
5448 for ( ; entity != NULL; entity = entity->base.next) {
5449 if (entity->base.symbol == NULL)
5452 if (entity->kind == ENTITY_FUNCTION) {
5453 get_function_entity(entity);
5454 } else if (entity->kind == ENTITY_VARIABLE) {
5455 create_global_variable(entity);
5459 /* second pass: create code/initializers */
5460 entity = scope->entities;
5461 for ( ; entity != NULL; entity = entity->base.next) {
5462 if (entity->base.symbol == NULL)
5465 if (entity->kind == ENTITY_FUNCTION) {
5466 create_function(entity);
5467 } else if (entity->kind == ENTITY_VARIABLE) {
5468 assert(entity->declaration.kind
5469 == DECLARATION_KIND_GLOBAL_VARIABLE);
5470 current_ir_graph = get_const_code_irg();
5471 create_variable_initializer(entity);
5476 void init_ast2firm(void)
5478 obstack_init(&asm_obst);
5479 init_atomic_modes();
5481 /* OS option must be set to the backend */
5482 switch (firm_opt.os_support) {
5483 case OS_SUPPORT_MINGW:
5484 create_ld_ident = create_name_win32;
5486 case OS_SUPPORT_LINUX:
5487 create_ld_ident = create_name_linux_elf;
5489 case OS_SUPPORT_MACHO:
5490 create_ld_ident = create_name_macho;
5493 panic("unexpected OS support mode");
5496 /* create idents for all known runtime functions */
5497 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5498 rts_idents[i] = new_id_from_str(rts_data[i].name);
5501 entitymap_init(&entitymap);
5504 static void init_ir_types(void)
5506 static int ir_types_initialized = 0;
5507 if (ir_types_initialized)
5509 ir_types_initialized = 1;
5511 ir_type_int = get_ir_type(type_int);
5512 ir_type_const_char = get_ir_type(type_const_char);
5513 ir_type_wchar_t = get_ir_type(type_wchar_t);
5514 ir_type_void = get_ir_type(type_void);
5517 void exit_ast2firm(void)
5519 entitymap_destroy(&entitymap);
5520 obstack_free(&asm_obst, NULL);
5523 static void global_asm_to_firm(statement_t *s)
5525 for (; s != NULL; s = s->base.next) {
5526 assert(s->kind == STATEMENT_ASM);
5528 char const *const text = s->asms.asm_text.begin;
5529 size_t size = s->asms.asm_text.size;
5531 /* skip the last \0 */
5532 if (text[size - 1] == '\0')
5535 ident *const id = new_id_from_chars(text, size);
5540 void translation_unit_to_firm(translation_unit_t *unit)
5542 /* just to be sure */
5543 continue_label = NULL;
5545 current_switch_cond = NULL;
5546 current_translation_unit = unit;
5549 inner_functions = NEW_ARR_F(entity_t *, 0);
5551 scope_to_firm(&unit->scope);
5552 global_asm_to_firm(unit->global_asm);
5554 DEL_ARR_F(inner_functions);
5555 inner_functions = NULL;
5557 current_ir_graph = NULL;
5558 current_translation_unit = NULL;