2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 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
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
38 #include "jump_target.h"
45 #include "diagnostic.h"
46 #include "lang_features.h"
48 #include "type_hash.h"
53 #include "entitymap_t.h"
54 #include "driver/firm_opt.h"
56 typedef struct trampoline_region trampoline_region;
57 struct trampoline_region {
58 ir_entity *function; /**< The function that is called by this trampoline */
59 ir_entity *region; /**< created region for the trampoline */
62 typedef struct complex_value {
67 typedef struct complex_constant {
72 fp_model_t firm_fp_model = fp_model_precise;
74 static const backend_params *be_params;
76 static ir_type *ir_type_char;
78 /* architecture specific floating point arithmetic mode (if any) */
79 static ir_mode *mode_float_arithmetic;
81 /* alignment of stack parameters */
82 static unsigned stack_param_align;
84 static int next_value_number_function;
85 static jump_target continue_target;
86 static jump_target break_target;
87 static ir_node *current_switch;
88 static bool saw_default_label;
89 static entity_t **inner_functions;
90 static jump_target ijmp_target;
91 static ir_node **ijmp_ops;
92 static ir_node **ijmp_blocks;
93 static bool constant_folding;
95 #define PUSH_BREAK(val) \
96 jump_target const old_break_target = break_target; \
97 (init_jump_target(&break_target, (val)))
99 ((void)(break_target = old_break_target))
101 #define PUSH_CONTINUE(val) \
102 jump_target const old_continue_target = continue_target; \
103 (init_jump_target(&continue_target, (val)))
104 #define POP_CONTINUE() \
105 ((void)(continue_target = old_continue_target))
107 #define PUSH_IRG(val) \
108 ir_graph *const old_irg = current_ir_graph; \
109 ir_graph *const new_irg = (val); \
110 ((void)(current_ir_graph = new_irg))
113 (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
115 static const entity_t *current_function_entity;
116 static ir_node *current_function_name;
117 static ir_node *current_funcsig;
118 static ir_graph *current_function;
119 static translation_unit_t *current_translation_unit;
120 static trampoline_region *current_trampolines;
121 static ir_type *current_outer_frame;
122 static ir_node *current_static_link;
123 static ir_entity *current_vararg_entity;
125 static entitymap_t entitymap;
127 static struct obstack asm_obst;
129 typedef enum declaration_kind_t {
130 DECLARATION_KIND_UNKNOWN,
131 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
132 DECLARATION_KIND_GLOBAL_VARIABLE,
133 DECLARATION_KIND_LOCAL_VARIABLE,
134 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
135 DECLARATION_KIND_PARAMETER,
136 DECLARATION_KIND_PARAMETER_ENTITY,
137 DECLARATION_KIND_FUNCTION,
138 DECLARATION_KIND_COMPOUND_MEMBER,
139 DECLARATION_KIND_INNER_FUNCTION
140 } declaration_kind_t;
142 static ir_type *get_ir_type_incomplete(type_t *type);
144 static void enqueue_inner_function(entity_t *entity)
146 if (inner_functions == NULL)
147 inner_functions = NEW_ARR_F(entity_t *, 0);
148 ARR_APP1(entity_t*, inner_functions, entity);
151 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
153 const entity_t *entity = get_irg_loc_description(irg, pos);
155 if (entity != NULL) {
156 position_t const *const pos = &entity->base.pos;
157 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
159 return new_r_Unknown(irg, mode);
162 static src_loc_t dbg_retrieve(const dbg_info *dbg)
164 position_t const *const pos = (position_t const*)dbg;
166 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
168 return (src_loc_t){ NULL, 0, 0 };
172 static dbg_info *get_dbg_info(const position_t *pos)
174 return (dbg_info*) pos;
177 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
178 const type_dbg_info *dbg)
181 print_to_buffer(buffer, buffer_size);
182 const type_t *type = (const type_t*) dbg;
184 finish_print_to_buffer();
187 static type_dbg_info *get_type_dbg_info_(const type_t *type)
189 return (type_dbg_info*) type;
192 /* is the current block a reachable one? */
193 static bool currently_reachable(void)
195 ir_node *const block = get_cur_block();
196 return block != NULL && !is_Bad(block);
199 static void set_unreachable_now(void)
204 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
206 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
207 static ir_node *expression_to_value(expression_t const *expr);
208 static complex_value expression_to_complex(const expression_t *expression);
210 static unsigned decide_modulo_shift(unsigned type_size)
212 if (architecture_modulo_shift == 0)
214 if (type_size < architecture_modulo_shift)
215 return architecture_modulo_shift;
219 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
221 unsigned flags = get_atomic_type_flags(kind);
222 unsigned size = get_atomic_type_size(kind);
223 if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
225 case 4: return get_modeF();
226 case 8: return get_modeD();
227 default: panic("unexpected kind");
229 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
231 unsigned bit_size = size * 8;
232 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
233 unsigned modulo_shift = decide_modulo_shift(bit_size);
235 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
236 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
244 * Initialises the atomic modes depending on the machine size.
246 static void init_atomic_modes(void)
248 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
249 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
250 if (atomic_modes[i] != NULL)
252 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
256 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
258 assert(kind <= ATOMIC_TYPE_LAST);
259 return atomic_modes[kind];
262 static ir_node *get_vla_size(array_type_t *const type)
264 ir_node *size_node = type->size_node;
265 if (size_node == NULL) {
266 size_node = expression_to_value(type->size_expression);
267 type->size_node = size_node;
272 static unsigned count_parameters(const function_type_t *function_type)
276 function_parameter_t *parameter = function_type->parameters;
277 for ( ; parameter != NULL; parameter = parameter->next) {
284 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
287 ir_mode *mode = atomic_modes[akind];
288 ir_type *irtype = new_d_type_primitive(mode, dbgi);
289 unsigned alignment = get_atomic_type_alignment(akind);
290 unsigned size = get_atomic_type_size(akind);
292 set_type_size_bytes(irtype, size);
293 set_type_alignment_bytes(irtype, alignment);
299 * Creates a Firm type for an atomic type
301 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
303 type_dbg_info *dbgi = get_type_dbg_info_(type);
304 return create_primitive_irtype(akind, dbgi);
308 * Creates a Firm type for a complex type
310 static ir_type *create_complex_type(atomic_type_kind_t akind,
313 type_dbg_info *dbgi = get_type_dbg_info_(type);
314 ir_type *etype = create_primitive_irtype(akind, NULL);
315 ir_type *irtype = new_d_type_array(1, etype, dbgi);
317 int align = get_type_alignment_bytes(etype);
318 set_type_alignment_bytes(irtype, align);
319 unsigned n_elements = 2;
320 set_array_bounds_int(irtype, 0, 0, n_elements);
321 size_t elemsize = get_type_size_bytes(etype);
322 if (elemsize % align > 0) {
323 elemsize += align - (elemsize % align);
325 set_type_size_bytes(irtype, n_elements * elemsize);
326 set_type_state(irtype, layout_fixed);
332 * Creates a Firm type for an imaginary type
334 static ir_type *create_imaginary_type(const atomic_type_t *type)
336 return create_atomic_type(type->akind, (const type_t*)type);
340 * return type of a parameter (and take transparent union gnu extension into
343 static type_t *get_parameter_type(type_t *orig_type)
345 type_t *type = skip_typeref(orig_type);
346 if (is_type_union(type)
347 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
348 compound_t *compound = type->compound.compound;
349 type = compound->members.entities->declaration.type;
355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
357 type_t *return_type = skip_typeref(function_type->return_type);
359 int n_parameters = count_parameters(function_type)
360 + (for_closure ? 1 : 0);
361 int n_results = is_type_void(return_type) ? 0 : 1;
362 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
363 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
365 if (!is_type_void(return_type)) {
366 ir_type *restype = get_ir_type(return_type);
367 set_method_res_type(irtype, 0, restype);
370 function_parameter_t *parameter = function_type->parameters;
373 ir_type *p_irtype = get_ir_type(type_void_ptr);
374 set_method_param_type(irtype, n, p_irtype);
377 for ( ; parameter != NULL; parameter = parameter->next) {
378 type_t *type = get_parameter_type(parameter->type);
379 ir_type *p_irtype = get_ir_type(type);
380 set_method_param_type(irtype, n, p_irtype);
384 bool is_variadic = function_type->variadic;
387 set_method_variadicity(irtype, variadicity_variadic);
389 unsigned cc = get_method_calling_convention(irtype);
390 switch (function_type->calling_convention) {
391 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
394 set_method_calling_convention(irtype, SET_CDECL(cc));
401 /* only non-variadic function can use stdcall, else use cdecl */
402 set_method_calling_convention(irtype, SET_STDCALL(cc));
408 /* only non-variadic function can use fastcall, else use cdecl */
409 set_method_calling_convention(irtype, SET_FASTCALL(cc));
413 /* Hmm, leave default, not accepted by the parser yet. */
418 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
420 const decl_modifiers_t modifiers = function_type->modifiers;
421 if (modifiers & DM_CONST)
422 add_method_additional_properties(irtype, mtp_property_const);
423 if (modifiers & DM_PURE)
424 add_method_additional_properties(irtype, mtp_property_pure);
425 if (modifiers & DM_RETURNS_TWICE)
426 add_method_additional_properties(irtype, mtp_property_returns_twice);
427 if (modifiers & DM_NORETURN)
428 add_method_additional_properties(irtype, mtp_property_noreturn);
429 if (modifiers & DM_NOTHROW)
430 add_method_additional_properties(irtype, mtp_property_nothrow);
431 if (modifiers & DM_MALLOC)
432 add_method_additional_properties(irtype, mtp_property_malloc);
437 static ir_type *create_pointer_type(pointer_type_t *type)
439 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
440 type_t *points_to = type->points_to;
441 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
442 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
447 static ir_type *create_reference_type(reference_type_t *type)
449 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
450 type_t *refers_to = type->refers_to;
451 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
452 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
457 static ir_type *create_array_type(array_type_t *type)
459 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
460 type_t *element_type = type->element_type;
461 ir_type *ir_element_type = get_ir_type(element_type);
462 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
464 const int align = get_type_alignment_bytes(ir_element_type);
465 set_type_alignment_bytes(irtype, align);
467 if (type->size_constant) {
468 int n_elements = type->size;
470 set_array_bounds_int(irtype, 0, 0, n_elements);
472 size_t elemsize = get_type_size_bytes(ir_element_type);
473 if (elemsize % align > 0) {
474 elemsize += align - (elemsize % align);
476 set_type_size_bytes(irtype, n_elements * elemsize);
478 set_array_lower_bound_int(irtype, 0, 0);
480 set_type_state(irtype, layout_fixed);
486 * Return the signed integer type of size bits.
488 * @param size the size
490 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
494 static ir_mode *s_modes[64 + 1] = {NULL, };
498 if (size <= 0 || size > 64)
501 mode = s_modes[size];
505 snprintf(name, sizeof(name), "bf_I%u", size);
506 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
507 s_modes[size] = mode;
510 type_dbg_info *dbgi = get_type_dbg_info_(type);
511 res = new_d_type_primitive(mode, dbgi);
512 set_primitive_base_type(res, base_tp);
518 * Return the unsigned integer type of size bits.
520 * @param size the size
522 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
526 static ir_mode *u_modes[64 + 1] = {NULL, };
530 if (size <= 0 || size > 64)
533 mode = u_modes[size];
537 snprintf(name, sizeof(name), "bf_U%u", size);
538 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
539 u_modes[size] = mode;
542 type_dbg_info *dbgi = get_type_dbg_info_(type);
543 res = new_d_type_primitive(mode, dbgi);
544 set_primitive_base_type(res, base_tp);
549 static ir_type *create_bitfield_type(const entity_t *entity)
551 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
552 type_t *base = skip_typeref(entity->declaration.type);
553 assert(is_type_integer(base));
554 ir_type *irbase = get_ir_type(base);
556 unsigned bit_size = entity->compound_member.bit_size;
558 if (is_type_signed(base)) {
559 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
561 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
566 * Construct firm type from ast struct type.
568 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
570 compound_t *compound = type->compound;
572 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
573 return compound->irtype;
576 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
578 symbol_t *type_symbol = compound->base.symbol;
580 if (type_symbol != NULL) {
581 id = new_id_from_str(type_symbol->string);
584 id = id_unique("__anonymous_union.%u");
586 id = id_unique("__anonymous_struct.%u");
592 irtype = new_type_union(id);
594 irtype = new_type_struct(id);
597 compound->irtype_complete = false;
598 compound->irtype = irtype;
604 layout_union_type(type);
606 layout_struct_type(type);
609 compound->irtype_complete = true;
611 entity_t *entry = compound->members.entities;
612 for ( ; entry != NULL; entry = entry->base.next) {
613 if (entry->kind != ENTITY_COMPOUND_MEMBER)
616 symbol_t *symbol = entry->base.symbol;
617 type_t *entry_type = entry->declaration.type;
619 if (symbol == NULL) {
620 /* anonymous bitfield member, skip */
621 if (entry->compound_member.bitfield)
623 assert(is_type_compound(entry_type));
624 ident = id_unique("anon.%u");
626 ident = new_id_from_str(symbol->string);
629 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
631 ir_type *entry_irtype;
632 if (entry->compound_member.bitfield) {
633 entry_irtype = create_bitfield_type(entry);
635 entry_irtype = get_ir_type(entry_type);
637 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
639 set_entity_offset(entity, entry->compound_member.offset);
640 set_entity_offset_bits_remainder(entity,
641 entry->compound_member.bit_offset);
643 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
644 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
645 entry->compound_member.entity = entity;
648 set_type_alignment_bytes(irtype, compound->alignment);
649 set_type_size_bytes(irtype, compound->size);
650 set_type_state(irtype, layout_fixed);
655 void determine_enum_values(enum_type_t *const type)
657 ir_mode *const mode = atomic_modes[type->base.akind];
658 ir_tarval *const one = get_mode_one(mode);
659 ir_tarval * tv_next = get_mode_null(mode);
661 enum_t *enume = type->enume;
662 entity_t *entry = enume->base.next;
663 for (; entry != NULL; entry = entry->base.next) {
664 if (entry->kind != ENTITY_ENUM_VALUE)
667 expression_t *const init = entry->enum_value.value;
669 tv_next = fold_constant_to_tarval(init);
671 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
672 entry->enum_value.tv = tv_next;
673 tv_next = tarval_add(tv_next, one);
677 static ir_type *create_enum_type(enum_type_t *const type)
679 return create_atomic_type(type->base.akind, (const type_t*) type);
682 static ir_type *get_ir_type_incomplete(type_t *type)
684 type = skip_typeref(type);
686 if (type->base.firm_type != NULL) {
687 return type->base.firm_type;
690 if (is_type_compound(type)) {
691 return create_compound_type(&type->compound, true);
693 return get_ir_type(type);
697 ir_type *get_ir_type(type_t *type)
699 type = skip_typeref(type);
701 if (type->base.firm_type != NULL) {
702 return type->base.firm_type;
705 ir_type *firm_type = NULL;
706 switch (type->kind) {
708 firm_type = create_atomic_type(type->atomic.akind, type);
711 firm_type = create_complex_type(type->atomic.akind, type);
714 firm_type = create_imaginary_type(&type->atomic);
717 firm_type = create_method_type(&type->function, false);
720 firm_type = create_pointer_type(&type->pointer);
723 firm_type = create_reference_type(&type->reference);
726 firm_type = create_array_type(&type->array);
728 case TYPE_COMPOUND_STRUCT:
729 case TYPE_COMPOUND_UNION:
730 firm_type = create_compound_type(&type->compound, false);
733 firm_type = create_enum_type(&type->enumt);
741 if (firm_type == NULL)
742 panic("unknown type found");
744 type->base.firm_type = firm_type;
748 static ir_mode *get_ir_mode_storage(type_t *type)
750 type = skip_typeref(type);
752 /* Firm doesn't report a mode for arrays and structs/unions. */
753 if (!is_type_scalar(type) || is_type_complex(type)) {
757 ir_type *const irtype = get_ir_type(type);
758 ir_mode *const mode = get_type_mode(irtype);
759 assert(mode != NULL);
763 static ir_mode *get_complex_mode_storage(type_t *type)
765 assert(is_type_complex(skip_typeref(type)));
766 ir_type *const irtype = get_ir_type(type);
767 ir_type *const etype = get_array_element_type(irtype);
768 ir_mode *const mode = get_type_mode(etype);
773 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
774 * int that it returns bigger modes for floating point on some platforms
775 * (x87 internally does arithemtic with 80bits)
777 static ir_mode *get_ir_mode_arithmetic(type_t *type)
779 ir_mode *mode = get_ir_mode_storage(type);
780 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
781 return mode_float_arithmetic;
787 static ir_mode *get_complex_mode_arithmetic(type_t *type)
789 ir_mode *mode = get_complex_mode_storage(type);
790 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
791 return mode_float_arithmetic;
798 * Return a node representing the size of a type.
800 static ir_node *get_type_size_node(type_t *type)
802 ir_mode *const mode = get_ir_mode_storage(type_size_t);
803 type = skip_typeref(type);
805 if (is_type_array(type) && type->array.is_vla) {
806 ir_node *size_node = get_vla_size(&type->array);
807 ir_node *elem_size = get_type_size_node(type->array.element_type);
808 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
812 unsigned const size = get_type_size(type);
813 return new_Const_long(mode, size);
816 /** Names of the runtime functions. */
817 static const struct {
818 int id; /**< the rts id */
819 int n_res; /**< number of return values */
820 const char *name; /**< the name of the rts function */
821 int n_params; /**< number of parameters */
822 unsigned flags; /**< language flags */
824 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
825 { rts_abort, 0, "abort", 0, _C89 },
826 { rts_alloca, 1, "alloca", 1, _ALL },
827 { rts_abs, 1, "abs", 1, _C89 },
828 { rts_labs, 1, "labs", 1, _C89 },
829 { rts_llabs, 1, "llabs", 1, _C99 },
830 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
832 { rts_fabs, 1, "fabs", 1, _C89 },
833 { rts_sqrt, 1, "sqrt", 1, _C89 },
834 { rts_cbrt, 1, "cbrt", 1, _C99 },
835 { rts_exp, 1, "exp", 1, _C89 },
836 { rts_exp2, 1, "exp2", 1, _C89 },
837 { rts_exp10, 1, "exp10", 1, _GNUC },
838 { rts_log, 1, "log", 1, _C89 },
839 { rts_log2, 1, "log2", 1, _C89 },
840 { rts_log10, 1, "log10", 1, _C89 },
841 { rts_pow, 1, "pow", 2, _C89 },
842 { rts_sin, 1, "sin", 1, _C89 },
843 { rts_cos, 1, "cos", 1, _C89 },
844 { rts_tan, 1, "tan", 1, _C89 },
845 { rts_asin, 1, "asin", 1, _C89 },
846 { rts_acos, 1, "acos", 1, _C89 },
847 { rts_atan, 1, "atan", 1, _C89 },
848 { rts_sinh, 1, "sinh", 1, _C89 },
849 { rts_cosh, 1, "cosh", 1, _C89 },
850 { rts_tanh, 1, "tanh", 1, _C89 },
852 { rts_fabsf, 1, "fabsf", 1, _C99 },
853 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
854 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
855 { rts_expf, 1, "expf", 1, _C99 },
856 { rts_exp2f, 1, "exp2f", 1, _C99 },
857 { rts_exp10f, 1, "exp10f", 1, _GNUC },
858 { rts_logf, 1, "logf", 1, _C99 },
859 { rts_log2f, 1, "log2f", 1, _C99 },
860 { rts_log10f, 1, "log10f", 1, _C99 },
861 { rts_powf, 1, "powf", 2, _C99 },
862 { rts_sinf, 1, "sinf", 1, _C99 },
863 { rts_cosf, 1, "cosf", 1, _C99 },
864 { rts_tanf, 1, "tanf", 1, _C99 },
865 { rts_asinf, 1, "asinf", 1, _C99 },
866 { rts_acosf, 1, "acosf", 1, _C99 },
867 { rts_atanf, 1, "atanf", 1, _C99 },
868 { rts_sinhf, 1, "sinhf", 1, _C99 },
869 { rts_coshf, 1, "coshf", 1, _C99 },
870 { rts_tanhf, 1, "tanhf", 1, _C99 },
872 { rts_fabsl, 1, "fabsl", 1, _C99 },
873 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
874 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
875 { rts_expl, 1, "expl", 1, _C99 },
876 { rts_exp2l, 1, "exp2l", 1, _C99 },
877 { rts_exp10l, 1, "exp10l", 1, _GNUC },
878 { rts_logl, 1, "logl", 1, _C99 },
879 { rts_log2l, 1, "log2l", 1, _C99 },
880 { rts_log10l, 1, "log10l", 1, _C99 },
881 { rts_powl, 1, "powl", 2, _C99 },
882 { rts_sinl, 1, "sinl", 1, _C99 },
883 { rts_cosl, 1, "cosl", 1, _C99 },
884 { rts_tanl, 1, "tanl", 1, _C99 },
885 { rts_asinl, 1, "asinl", 1, _C99 },
886 { rts_acosl, 1, "acosl", 1, _C99 },
887 { rts_atanl, 1, "atanl", 1, _C99 },
888 { rts_sinhl, 1, "sinhl", 1, _C99 },
889 { rts_coshl, 1, "coshl", 1, _C99 },
890 { rts_tanhl, 1, "tanhl", 1, _C99 },
892 { rts_strcmp, 1, "strcmp", 2, _C89 },
893 { rts_strncmp, 1, "strncmp", 3, _C89 },
894 { rts_strcpy, 1, "strcpy", 2, _C89 },
895 { rts_strlen, 1, "strlen", 1, _C89 },
896 { rts_memcpy, 1, "memcpy", 3, _C89 },
897 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
898 { rts_memmove, 1, "memmove", 3, _C89 },
899 { rts_memset, 1, "memset", 3, _C89 },
900 { rts_memcmp, 1, "memcmp", 3, _C89 },
903 static ident *rts_idents[lengthof(rts_data)];
905 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
907 void set_create_ld_ident(ident *(*func)(entity_t*))
909 create_ld_ident = func;
912 static bool declaration_is_definition(const entity_t *entity)
914 switch (entity->kind) {
915 case ENTITY_VARIABLE:
916 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
917 case ENTITY_FUNCTION:
918 return entity->function.body != NULL;
919 case ENTITY_PARAMETER:
920 case ENTITY_COMPOUND_MEMBER:
924 case ENTITY_ENUM_VALUE:
925 case ENTITY_NAMESPACE:
927 case ENTITY_LOCAL_LABEL:
930 panic("entity is not a declaration");
934 * Handle GNU attributes for entities
936 * @param ent the entity
937 * @param decl the routine declaration
939 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
941 assert(is_declaration(entity));
942 decl_modifiers_t modifiers = entity->declaration.modifiers;
944 if (is_method_entity(irentity)) {
945 if (modifiers & DM_PURE)
946 add_entity_additional_properties(irentity, mtp_property_pure);
947 if (modifiers & DM_CONST)
948 add_entity_additional_properties(irentity, mtp_property_const);
949 if (modifiers & DM_NOINLINE)
950 add_entity_additional_properties(irentity, mtp_property_noinline);
951 if (modifiers & DM_FORCEINLINE)
952 add_entity_additional_properties(irentity, mtp_property_always_inline);
953 if (modifiers & DM_NAKED)
954 add_entity_additional_properties(irentity, mtp_property_naked);
955 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
956 add_entity_additional_properties(irentity,
957 mtp_property_inline_recommended);
959 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
960 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
962 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
963 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
964 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
968 static bool is_main(entity_t *entity)
970 static symbol_t *sym_main = NULL;
971 if (sym_main == NULL) {
972 sym_main = symbol_table_insert("main");
975 if (entity->base.symbol != sym_main)
977 /* must be in outermost scope */
978 if (entity->base.parent_scope != ¤t_translation_unit->scope)
985 * Creates an entity representing a function.
987 * @param entity the function declaration/definition
988 * @param owner_type the owner type of this function, NULL
989 * for global functions
991 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
993 assert(entity->kind == ENTITY_FUNCTION);
994 if (entity->function.irentity != NULL)
995 return entity->function.irentity;
997 switch (entity->function.btk) {
1000 case BUILTIN_LIBC_CHECK:
1006 symbol_t *symbol = entity->base.symbol;
1007 ident *id = new_id_from_str(symbol->string);
1009 /* already an entity defined? */
1010 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1011 bool const has_body = entity->function.body != NULL;
1012 if (irentity != NULL) {
1013 goto entity_created;
1016 ir_type *ir_type_method;
1017 if (entity->function.need_closure)
1018 ir_type_method = create_method_type(&entity->declaration.type->function, true);
1020 ir_type_method = get_ir_type(entity->declaration.type);
1022 bool nested_function = false;
1023 if (owner_type == NULL)
1024 owner_type = get_glob_type();
1026 nested_function = true;
1028 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
1029 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1032 if (nested_function)
1033 ld_id = id_unique("inner.%u");
1035 ld_id = create_ld_ident(entity);
1036 set_entity_ld_ident(irentity, ld_id);
1038 handle_decl_modifiers(irentity, entity);
1040 if (! nested_function) {
1041 storage_class_tag_t const storage_class
1042 = (storage_class_tag_t) entity->declaration.storage_class;
1043 if (storage_class == STORAGE_CLASS_STATIC) {
1044 set_entity_visibility(irentity, ir_visibility_local);
1046 set_entity_visibility(irentity, ir_visibility_external);
1049 bool const is_inline = entity->function.is_inline;
1050 if (is_inline && has_body) {
1051 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1052 || ((c_mode & _C99) == 0
1053 && storage_class == STORAGE_CLASS_EXTERN)) {
1054 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1058 /* nested functions are always local */
1059 set_entity_visibility(irentity, ir_visibility_local);
1062 /* We should check for file scope here, but as long as we compile C only
1063 this is not needed. */
1064 if (!freestanding && !has_body) {
1065 /* check for a known runtime function */
1066 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1067 if (id != rts_idents[i])
1070 function_type_t *function_type
1071 = &entity->declaration.type->function;
1072 /* rts_entities code can't handle a "wrong" number of parameters */
1073 if (function_type->unspecified_parameters)
1076 /* check number of parameters */
1077 int n_params = count_parameters(function_type);
1078 if (n_params != rts_data[i].n_params)
1081 type_t *return_type = skip_typeref(function_type->return_type);
1082 int n_res = is_type_void(return_type) ? 0 : 1;
1083 if (n_res != rts_data[i].n_res)
1086 /* ignore those rts functions not necessary needed for current mode */
1087 if ((c_mode & rts_data[i].flags) == 0)
1089 assert(rts_entities[rts_data[i].id] == NULL);
1090 rts_entities[rts_data[i].id] = irentity;
1094 entitymap_insert(&entitymap, symbol, irentity);
1097 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1098 entity->function.irentity = irentity;
1104 * Creates a SymConst for a given entity.
1106 * @param dbgi debug info
1107 * @param entity the entity
1109 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1111 assert(entity != NULL);
1112 union symconst_symbol sym;
1113 sym.entity_p = entity;
1114 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1117 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1119 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1122 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1124 ir_mode *value_mode = get_irn_mode(value);
1126 if (value_mode == dest_mode)
1129 return new_d_Conv(dbgi, value, dest_mode);
1132 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1134 ir_mode *const mode = get_ir_mode_storage(type);
1135 return create_conv(dbgi, val, mode);
1139 * Creates a SymConst node representing a string constant.
1141 * @param src_pos the source position of the string constant
1142 * @param id_prefix a prefix for the name of the generated string constant
1143 * @param value the value of the string constant
1145 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1147 size_t const slen = get_string_len(value) + 1;
1148 ir_initializer_t *const initializer = create_initializer_compound(slen);
1149 ir_type * elem_type;
1150 switch (value->encoding) {
1151 case STRING_ENCODING_CHAR:
1152 case STRING_ENCODING_UTF8: {
1153 elem_type = ir_type_char;
1155 ir_mode *const mode = get_type_mode(elem_type);
1156 char const *p = value->begin;
1157 for (size_t i = 0; i < slen; ++i) {
1158 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1159 ir_initializer_t *val = create_initializer_tarval(tv);
1160 set_initializer_compound_value(initializer, i, val);
1167 case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1168 case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1169 case STRING_ENCODING_WIDE: type = type_wchar_t; goto init_wide;
1171 elem_type = get_ir_type(type);
1173 ir_mode *const mode = get_type_mode(elem_type);
1174 char const *p = value->begin;
1175 for (size_t i = 0; i < slen; ++i) {
1176 assert(p <= value->begin + value->size);
1177 utf32 v = read_utf8_char(&p);
1178 ir_tarval *tv = new_tarval_from_long(v, mode);
1179 ir_initializer_t *val = create_initializer_tarval(tv);
1180 set_initializer_compound_value(initializer, i, val);
1185 panic("invalid string encoding");
1188 ir_type *const type = new_type_array(1, elem_type);
1189 set_array_bounds_int(type, 0, 0, slen);
1190 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1191 set_type_state( type, layout_fixed);
1193 ir_type *const global_type = get_glob_type();
1194 ident *const id = id_unique(id_prefix);
1195 dbg_info *const dbgi = get_dbg_info(src_pos);
1196 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1197 set_entity_ld_ident( entity, id);
1198 set_entity_visibility( entity, ir_visibility_private);
1199 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1200 set_entity_initializer(entity, initializer);
1202 return create_symconst(dbgi, entity);
1205 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1207 assert(type->kind == TYPE_ATOMIC || type->kind == TYPE_COMPLEX);
1208 atomic_type_kind_t akind = type->atomic.akind;
1210 ir_mode *const mode = atomic_modes[akind];
1211 char const *const str = literal->value.begin;
1212 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1213 if (tv == tarval_bad)
1216 literal->base.type = type;
1217 literal->target_value = tv;
1221 void determine_literal_type(literal_expression_t *const literal)
1223 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1225 /* -1: signed only, 0: any, 1: unsigned only */
1227 !is_type_signed(literal->base.type) ? 1 :
1228 literal->value.begin[0] == '0' ? 0 :
1229 -1; /* Decimal literals only try signed types. */
1231 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1232 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1234 if (try_create_integer(literal, literal->base.type))
1237 /* now try if the constant is small enough for some types */
1238 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1240 if (sign <= 0 && try_create_integer(literal, type_long))
1242 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1244 /* last try? then we should not report tarval_bad */
1246 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1247 if (sign <= 0 && try_create_integer(literal, type_long_long))
1252 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1253 bool res = try_create_integer(literal, type_unsigned_long_long);
1255 panic("internal error when parsing number literal");
1258 tarval_set_integer_overflow_mode(old_mode);
1262 * Creates a Const node representing a constant.
1264 static ir_node *literal_to_firm_(const literal_expression_t *literal,
1267 const char *string = literal->value.begin;
1268 size_t size = literal->value.size;
1271 switch (literal->base.kind) {
1272 case EXPR_LITERAL_INTEGER:
1273 assert(literal->target_value != NULL);
1274 tv = literal->target_value;
1277 case EXPR_LITERAL_FLOATINGPOINT:
1278 tv = new_tarval_from_str(string, size, mode);
1281 case EXPR_LITERAL_BOOLEAN:
1282 if (string[0] == 't') {
1283 tv = get_mode_one(mode);
1285 assert(string[0] == 'f');
1286 case EXPR_LITERAL_MS_NOOP:
1287 tv = get_mode_null(mode);
1292 panic("invalid literal kind");
1295 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1296 return new_d_Const(dbgi, tv);
1299 static ir_node *literal_to_firm(const literal_expression_t *literal)
1301 type_t *type = skip_typeref(literal->base.type);
1302 ir_mode *mode_storage = get_ir_mode_storage(type);
1303 return literal_to_firm_(literal, mode_storage);
1307 * Creates a Const node representing a character constant.
1309 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1311 type_t *type = skip_typeref(literal->base.type);
1312 ir_mode *mode = get_ir_mode_storage(type);
1313 const char *string = literal->value.begin;
1314 size_t size = literal->value.size;
1317 switch (literal->value.encoding) {
1318 case STRING_ENCODING_WIDE: {
1319 utf32 v = read_utf8_char(&string);
1321 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1323 tv = new_tarval_from_str(buf, len, mode);
1327 case STRING_ENCODING_CHAR: {
1330 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1331 if (size == 1 && char_is_signed) {
1332 v = (signed char)string[0];
1335 for (size_t i = 0; i < size; ++i) {
1336 v = (v << 8) | ((unsigned char)string[i]);
1340 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1342 tv = new_tarval_from_str(buf, len, mode);
1347 panic("invalid literal kind");
1350 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1351 return new_d_Const(dbgi, tv);
1355 * Allocate an area of size bytes aligned at alignment
1358 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1360 static unsigned area_cnt = 0;
1363 ir_type *tp = new_type_array(1, ir_type_char);
1364 set_array_bounds_int(tp, 0, 0, size);
1365 set_type_alignment_bytes(tp, alignment);
1367 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1368 ident *name = new_id_from_str(buf);
1369 ir_entity *area = new_entity(frame_type, name, tp);
1371 /* mark this entity as compiler generated */
1372 set_entity_compiler_generated(area, 1);
1377 * Return a node representing a trampoline region
1378 * for a given function entity.
1380 * @param dbgi debug info
1381 * @param entity the function entity
1383 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1385 ir_entity *region = NULL;
1388 if (current_trampolines != NULL) {
1389 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1390 if (current_trampolines[i].function == entity) {
1391 region = current_trampolines[i].region;
1396 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1398 ir_graph *irg = current_ir_graph;
1399 if (region == NULL) {
1400 /* create a new region */
1401 ir_type *frame_tp = get_irg_frame_type(irg);
1402 trampoline_region reg;
1403 reg.function = entity;
1405 reg.region = alloc_trampoline(frame_tp,
1406 be_params->trampoline_size,
1407 be_params->trampoline_align);
1408 ARR_APP1(trampoline_region, current_trampolines, reg);
1409 region = reg.region;
1411 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1416 * Creates a trampoline for a function represented by an entity.
1418 * @param dbgi debug info
1419 * @param mode the (reference) mode for the function address
1420 * @param entity the function entity
1422 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1425 assert(entity != NULL);
1427 in[0] = get_trampoline_region(dbgi, entity);
1428 in[1] = create_symconst(dbgi, entity);
1429 in[2] = get_irg_frame(current_ir_graph);
1431 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1432 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1433 return new_Proj(irn, mode, pn_Builtin_max+1);
1437 * Dereference an address.
1439 * @param dbgi debug info
1440 * @param type the type of the dereferenced result (the points_to type)
1441 * @param addr the address to dereference
1443 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1444 ir_node *const addr)
1446 type_t *skipped = skip_typeref(type);
1447 if (is_type_incomplete(skipped))
1450 ir_type *irtype = get_ir_type(skipped);
1451 if (is_compound_type(irtype)
1452 || is_Method_type(irtype)
1453 || is_Array_type(irtype)) {
1457 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1458 ? cons_volatile : cons_none;
1459 ir_mode *const mode = get_type_mode(irtype);
1460 ir_node *const memory = get_store();
1461 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1462 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1463 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1465 set_store(load_mem);
1470 * Returns the correct base address depending on whether it is a parameter or a
1471 * normal local variable.
1473 static ir_node *get_local_frame(ir_entity *const ent)
1475 ir_graph *const irg = current_ir_graph;
1476 const ir_type *const owner = get_entity_owner(ent);
1477 if (owner == current_outer_frame) {
1478 assert(current_static_link != NULL);
1479 return current_static_link;
1481 return get_irg_frame(irg);
1486 * Keep the current block and memory.
1487 * This is necessary for all loops, because they could become infinite.
1489 static void keep_loop(void)
1491 keep_alive(get_cur_block());
1492 keep_alive(get_store());
1495 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1497 entity_t *entity = ref->entity;
1498 if (entity->enum_value.tv == NULL) {
1499 type_t *type = skip_typeref(entity->enum_value.enum_type);
1500 assert(type->kind == TYPE_ENUM);
1501 determine_enum_values(&type->enumt);
1504 return new_Const(entity->enum_value.tv);
1507 static ir_node *reference_addr(const reference_expression_t *ref)
1509 dbg_info *dbgi = get_dbg_info(&ref->base.pos);
1510 entity_t *entity = ref->entity;
1511 assert(is_declaration(entity));
1513 if (entity->kind == ENTITY_FUNCTION
1514 && entity->function.btk != BUILTIN_NONE) {
1515 ir_entity *irentity = get_function_entity(entity, NULL);
1516 /* for gcc compatibility we have to produce (dummy) addresses for some
1517 * builtins which don't have entities */
1518 if (irentity == NULL) {
1519 position_t const *const pos = &ref->base.pos;
1520 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1522 /* simply create a NULL pointer */
1523 ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1524 return new_Const(get_mode_null(mode));
1528 switch ((declaration_kind_t) entity->declaration.kind) {
1529 case DECLARATION_KIND_UNKNOWN:
1531 case DECLARATION_KIND_PARAMETER:
1532 case DECLARATION_KIND_LOCAL_VARIABLE:
1533 /* you can store to a local variable (so we don't panic but return NULL
1534 * as an indicator for no real address) */
1536 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1537 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1541 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1542 case DECLARATION_KIND_PARAMETER_ENTITY: {
1543 ir_entity *irentity = entity->variable.v.entity;
1544 ir_node *frame = get_local_frame(irentity);
1545 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1549 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1550 return entity->variable.v.vla_base;
1552 case DECLARATION_KIND_FUNCTION: {
1553 return create_symconst(dbgi, entity->function.irentity);
1556 case DECLARATION_KIND_INNER_FUNCTION: {
1557 type_t *const type = skip_typeref(entity->declaration.type);
1558 ir_mode *const mode = get_ir_mode_storage(type);
1559 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1560 /* inner function not using the closure */
1561 return create_symconst(dbgi, entity->function.irentity);
1563 /* need trampoline here */
1564 return create_trampoline(dbgi, mode, entity->function.irentity);
1568 case DECLARATION_KIND_COMPOUND_MEMBER:
1569 panic("not implemented reference type");
1572 panic("reference to declaration with unknown type");
1575 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1577 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
1578 entity_t *const entity = ref->entity;
1579 assert(is_declaration(entity));
1581 switch ((declaration_kind_t)entity->declaration.kind) {
1582 case DECLARATION_KIND_LOCAL_VARIABLE:
1583 case DECLARATION_KIND_PARAMETER: {
1584 type_t *const type = skip_typeref(entity->declaration.type);
1585 ir_mode *const mode = get_ir_mode_storage(type);
1586 return get_value(entity->variable.v.value_number, mode);
1590 ir_node *const addr = reference_addr(ref);
1591 return deref_address(dbgi, entity->declaration.type, addr);
1597 * Transform calls to builtin functions.
1599 static ir_node *process_builtin_call(const call_expression_t *call)
1601 dbg_info *dbgi = get_dbg_info(&call->base.pos);
1603 assert(call->function->kind == EXPR_REFERENCE);
1604 reference_expression_t *builtin = &call->function->reference;
1606 type_t *expr_type = skip_typeref(builtin->base.type);
1607 assert(is_type_pointer(expr_type));
1609 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1611 switch (builtin->entity->function.btk) {
1614 case BUILTIN_ALLOCA: {
1615 expression_t *argument = call->arguments->expression;
1616 ir_node *size = expression_to_value(argument);
1618 ir_node *store = get_store();
1619 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1621 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1623 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1628 type_t *type = function_type->function.return_type;
1629 ir_mode *mode = get_ir_mode_storage(type);
1630 ir_tarval *tv = get_mode_infinite(mode);
1631 ir_node *res = new_d_Const(dbgi, tv);
1635 /* Ignore string for now... */
1636 assert(is_type_function(function_type));
1637 type_t *type = function_type->function.return_type;
1638 ir_mode *mode = get_ir_mode_storage(type);
1639 ir_tarval *tv = get_mode_NAN(mode);
1640 ir_node *res = new_d_Const(dbgi, tv);
1643 case BUILTIN_EXPECT: {
1644 expression_t *argument = call->arguments->expression;
1645 return expression_to_value(argument);
1647 case BUILTIN_VA_END:
1648 /* evaluate the argument of va_end for its side effects */
1649 expression_to_value(call->arguments->expression);
1651 case BUILTIN_OBJECT_SIZE: {
1652 /* determine value of "type" */
1653 expression_t *type_expression = call->arguments->next->expression;
1654 long type_val = fold_constant_to_int(type_expression);
1655 type_t *type = function_type->function.return_type;
1656 ir_mode *mode = get_ir_mode_storage(type);
1657 /* just produce a "I don't know" result */
1658 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1659 get_mode_minus_one(mode);
1661 return new_d_Const(dbgi, result);
1663 case BUILTIN_ROTL: {
1664 ir_node *val = expression_to_value(call->arguments->expression);
1665 ir_node *shf = expression_to_value(call->arguments->next->expression);
1666 ir_mode *mode = get_irn_mode(val);
1667 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1668 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1670 case BUILTIN_ROTR: {
1671 ir_node *val = expression_to_value(call->arguments->expression);
1672 ir_node *shf = expression_to_value(call->arguments->next->expression);
1673 ir_mode *mode = get_irn_mode(val);
1674 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1675 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1676 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1677 return new_d_Rotl(dbgi, val, sub, mode);
1682 case BUILTIN_LIBC_CHECK:
1683 panic("builtin did not produce an entity");
1685 panic("invalid builtin");
1688 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
1689 complex_value value);
1692 * Transform a call expression.
1693 * Handles some special cases, like alloca() calls, which must be resolved
1694 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1695 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1698 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1700 dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1701 assert(currently_reachable());
1703 expression_t *function = call->function;
1704 ir_node *callee = NULL;
1705 bool firm_builtin = false;
1706 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1707 if (function->kind == EXPR_REFERENCE) {
1708 const reference_expression_t *ref = &function->reference;
1709 entity_t *entity = ref->entity;
1711 if (entity->kind == ENTITY_FUNCTION) {
1712 builtin_kind_t builtin = entity->function.btk;
1713 if (builtin == BUILTIN_FIRM) {
1714 firm_builtin = true;
1715 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1716 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1717 && builtin != BUILTIN_LIBC_CHECK) {
1718 return process_builtin_call(call);
1723 callee = expression_to_value(function);
1725 type_t *type = skip_typeref(function->base.type);
1726 assert(is_type_pointer(type));
1727 pointer_type_t *pointer_type = &type->pointer;
1728 type_t *points_to = skip_typeref(pointer_type->points_to);
1729 assert(is_type_function(points_to));
1730 function_type_t *function_type = &points_to->function;
1732 int n_parameters = 0;
1733 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1734 ir_type *new_method_type = NULL;
1735 if (function_type->variadic || function_type->unspecified_parameters) {
1736 const call_argument_t *argument = call->arguments;
1737 for ( ; argument != NULL; argument = argument->next) {
1741 /* we need to construct a new method type matching the call
1743 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1744 int n_res = get_method_n_ress(ir_method_type);
1745 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1746 set_method_calling_convention(new_method_type,
1747 get_method_calling_convention(ir_method_type));
1748 set_method_additional_properties(new_method_type,
1749 get_method_additional_properties(ir_method_type));
1750 set_method_variadicity(new_method_type,
1751 get_method_variadicity(ir_method_type));
1753 for (int i = 0; i < n_res; ++i) {
1754 set_method_res_type(new_method_type, i,
1755 get_method_res_type(ir_method_type, i));
1757 argument = call->arguments;
1758 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1759 expression_t *expression = argument->expression;
1760 ir_type *irtype = get_ir_type(expression->base.type);
1761 set_method_param_type(new_method_type, i, irtype);
1763 ir_method_type = new_method_type;
1765 n_parameters = get_method_n_params(ir_method_type);
1768 ir_node *in[n_parameters];
1770 const call_argument_t *argument = call->arguments;
1771 for (int n = 0; n < n_parameters; ++n) {
1772 expression_t *expression = argument->expression;
1773 type_t *arg_type = skip_typeref(expression->base.type);
1775 if (is_type_complex(arg_type)) {
1776 complex_value value = expression_to_complex(expression);
1777 arg_node = complex_to_memory(dbgi, arg_type, value);
1779 arg_node = expression_to_value(expression);
1780 if (!is_type_compound(arg_type)) {
1781 ir_mode *const mode = get_ir_mode_storage(arg_type);
1782 arg_node = create_conv(dbgi, arg_node, mode);
1788 argument = argument->next;
1792 if (function_type->modifiers & DM_CONST) {
1793 store = get_irg_no_mem(current_ir_graph);
1795 store = get_store();
1799 type_t *return_type = skip_typeref(function_type->return_type);
1800 ir_node *result = NULL;
1802 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1804 if (! (function_type->modifiers & DM_CONST)) {
1805 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1809 if (!is_type_void(return_type)) {
1810 assert(is_type_scalar(return_type));
1811 ir_mode *mode = get_ir_mode_storage(return_type);
1812 result = new_Proj(node, mode, pn_Builtin_max+1);
1815 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1816 if (! (function_type->modifiers & DM_CONST)) {
1817 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1821 if (!is_type_void(return_type)) {
1822 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1823 ir_mode *const mode = get_ir_mode_storage(return_type);
1824 result = new_Proj(resproj, mode, 0);
1828 if (function_type->modifiers & DM_NORETURN) {
1829 /* A dead end: Keep the Call and the Block. Also place all further
1830 * nodes into a new and unreachable block. */
1832 keep_alive(get_cur_block());
1833 ir_node *block = new_Block(0, NULL);
1834 set_cur_block(block);
1840 static ir_node *statement_to_firm(statement_t *statement);
1841 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1842 static ir_node *expression_to_addr(const expression_t *expression);
1844 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1847 value = conv_to_storage_type(dbgi, value, type);
1849 ir_node *memory = get_store();
1851 if (is_type_scalar(type) && !is_type_complex(type)) {
1852 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1853 ? cons_volatile : cons_none;
1854 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1855 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1856 set_store(store_mem);
1858 ir_type *irtype = get_ir_type(type);
1859 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1860 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1861 set_store(copyb_mem);
1865 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1867 ir_tarval *all_one = get_mode_all_one(mode);
1868 int mode_size = get_mode_size_bits(mode);
1869 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1871 assert(offset >= 0);
1873 assert(offset + size <= mode_size);
1874 if (size == mode_size) {
1878 long shiftr = get_mode_size_bits(mode) - size;
1879 long shiftl = offset;
1880 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1881 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1882 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1883 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1888 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1889 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1892 ir_type *entity_type = get_entity_type(entity);
1893 ir_type *base_type = get_primitive_base_type(entity_type);
1894 ir_mode *mode = get_type_mode(base_type);
1895 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1897 value = create_conv(dbgi, value, mode);
1899 /* kill upper bits of value and shift to right position */
1900 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1901 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1902 unsigned base_bits = get_mode_size_bits(mode);
1903 unsigned shiftwidth = base_bits - bitsize;
1905 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1906 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1908 unsigned shrwidth = base_bits - bitsize - bitoffset;
1909 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1910 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1912 /* load current value */
1913 ir_node *mem = get_store();
1914 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1915 set_volatile ? cons_volatile : cons_none);
1916 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1917 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1918 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1919 ir_tarval *inv_mask = tarval_not(shift_mask);
1920 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1921 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1923 /* construct new value and store */
1924 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1925 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1926 set_volatile ? cons_volatile : cons_none);
1927 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1928 set_store(store_mem);
1934 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1935 if (mode_is_signed(mode)) {
1936 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1938 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1943 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1946 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1947 entity_t *entity = expression->compound_entry;
1948 type_t *base_type = entity->declaration.type;
1949 ir_mode *mode = get_ir_mode_storage(base_type);
1950 ir_node *mem = get_store();
1951 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1952 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1953 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1954 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1956 ir_mode *amode = mode;
1957 /* optimisation, since shifting in modes < machine_size is usually
1959 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1962 unsigned amode_size = get_mode_size_bits(amode);
1963 load_res = create_conv(dbgi, load_res, amode);
1965 set_store(load_mem);
1967 /* kill upper bits */
1968 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1969 unsigned bitoffset = entity->compound_member.bit_offset;
1970 unsigned bitsize = entity->compound_member.bit_size;
1971 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1972 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1973 ir_node *countl = new_d_Const(dbgi, tvl);
1974 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1976 unsigned shift_bitsr = bitoffset + shift_bitsl;
1977 assert(shift_bitsr <= amode_size);
1978 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1979 ir_node *countr = new_d_Const(dbgi, tvr);
1981 if (mode_is_signed(mode)) {
1982 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1984 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1987 return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1990 /* make sure the selected compound type is constructed */
1991 static void construct_select_compound(const select_expression_t *expression)
1993 type_t *type = skip_typeref(expression->compound->base.type);
1994 if (is_type_pointer(type)) {
1995 type = type->pointer.points_to;
1997 (void) get_ir_type(type);
2000 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2001 ir_node *value, ir_node *addr)
2003 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2004 type_t *type = skip_typeref(expression->base.type);
2005 value = conv_to_storage_type(dbgi, value, type);
2007 if (expression->kind == EXPR_REFERENCE) {
2008 const reference_expression_t *ref = &expression->reference;
2010 entity_t *entity = ref->entity;
2011 assert(is_declaration(entity));
2012 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2013 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2014 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2015 set_value(entity->variable.v.value_number, value);
2021 addr = expression_to_addr(expression);
2022 assert(addr != NULL);
2024 if (expression->kind == EXPR_SELECT) {
2025 const select_expression_t *select = &expression->select;
2027 construct_select_compound(select);
2029 entity_t *entity = select->compound_entry;
2030 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2031 if (entity->compound_member.bitfield) {
2032 ir_entity *irentity = entity->compound_member.entity;
2034 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2035 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2036 set_volatile, true);
2041 assign_value(dbgi, addr, type, value);
2045 static ir_node *get_value_from_lvalue(const expression_t *expression,
2048 if (expression->kind == EXPR_REFERENCE) {
2049 const reference_expression_t *ref = &expression->reference;
2051 entity_t *entity = ref->entity;
2052 assert(entity->kind == ENTITY_VARIABLE
2053 || entity->kind == ENTITY_PARAMETER);
2054 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2056 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2057 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2058 value_number = entity->variable.v.value_number;
2059 assert(addr == NULL);
2060 type_t *type = skip_typeref(expression->base.type);
2061 ir_mode *mode = get_ir_mode_storage(type);
2062 return get_value(value_number, mode);
2066 assert(addr != NULL);
2067 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2070 if (expression->kind == EXPR_SELECT &&
2071 expression->select.compound_entry->compound_member.bitfield) {
2072 construct_select_compound(&expression->select);
2073 value = bitfield_extract_to_firm(&expression->select, addr);
2075 value = deref_address(dbgi, expression->base.type, addr);
2081 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2083 type_t *const type = skip_typeref(expr->base.type);
2084 ir_mode *const mode = get_ir_mode_arithmetic(type);
2087 if (is_type_pointer(type)) {
2088 offset = get_type_size_node(type->pointer.points_to);
2090 assert(is_type_arithmetic(type));
2091 offset = new_Const(get_mode_one(mode));
2094 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2095 expression_t const *const value_expr = expr->value;
2096 ir_node *const addr = expression_to_addr(value_expr);
2097 ir_node *const value = get_value_from_lvalue(value_expr, addr);
2098 ir_node *const value_arith = create_conv(dbgi, value, mode);
2099 ir_node *const new_value = inc
2100 ? new_d_Add(dbgi, value_arith, offset, mode)
2101 : new_d_Sub(dbgi, value_arith, offset, mode);
2103 ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2104 return pre ? store_value : value;
2107 static bool is_local_variable(expression_t *expression)
2109 if (expression->kind != EXPR_REFERENCE)
2111 reference_expression_t *ref_expr = &expression->reference;
2112 entity_t *entity = ref_expr->entity;
2113 if (entity->kind != ENTITY_VARIABLE)
2115 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2116 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2119 static ir_relation get_relation(const expression_kind_t kind)
2122 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2123 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2124 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2125 case EXPR_BINARY_ISLESS:
2126 case EXPR_BINARY_LESS: return ir_relation_less;
2127 case EXPR_BINARY_ISLESSEQUAL:
2128 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2129 case EXPR_BINARY_ISGREATER:
2130 case EXPR_BINARY_GREATER: return ir_relation_greater;
2131 case EXPR_BINARY_ISGREATEREQUAL:
2132 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2133 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2138 panic("trying to get ir_relation from non-comparison binexpr type");
2142 * Handle the assume optimizer hint: check if a Confirm
2143 * node can be created.
2145 * @param dbi debug info
2146 * @param expr the IL assume expression
2148 * we support here only some simple cases:
2153 static ir_node *handle_assume_compare(dbg_info *dbi,
2154 const binary_expression_t *expression)
2156 expression_t *op1 = expression->left;
2157 expression_t *op2 = expression->right;
2158 entity_t *var2, *var = NULL;
2159 ir_node *res = NULL;
2160 ir_relation relation = get_relation(expression->base.kind);
2162 if (is_local_variable(op1) && is_local_variable(op2)) {
2163 var = op1->reference.entity;
2164 var2 = op2->reference.entity;
2166 type_t *const type = skip_typeref(var->declaration.type);
2167 ir_mode *const mode = get_ir_mode_storage(type);
2169 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2170 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2172 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2173 set_value(var2->variable.v.value_number, res);
2175 res = new_d_Confirm(dbi, irn1, irn2, relation);
2176 set_value(var->variable.v.value_number, res);
2181 expression_t *con = NULL;
2182 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2183 var = op1->reference.entity;
2185 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2186 relation = get_inversed_relation(relation);
2187 var = op2->reference.entity;
2192 type_t *const type = skip_typeref(var->declaration.type);
2193 ir_mode *const mode = get_ir_mode_storage(type);
2195 res = get_value(var->variable.v.value_number, mode);
2196 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2197 set_value(var->variable.v.value_number, res);
2203 * Handle the assume optimizer hint.
2205 * @param dbi debug info
2206 * @param expr the IL assume expression
2208 static ir_node *handle_assume(expression_t const *const expr)
2210 switch (expr->kind) {
2211 case EXPR_BINARY_EQUAL:
2212 case EXPR_BINARY_NOTEQUAL:
2213 case EXPR_BINARY_LESS:
2214 case EXPR_BINARY_LESSEQUAL:
2215 case EXPR_BINARY_GREATER:
2216 case EXPR_BINARY_GREATEREQUAL: {
2217 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2218 return handle_assume_compare(dbgi, &expr->binary);
2226 static ir_node *create_cast(unary_expression_t const *const expr)
2228 type_t *const type = skip_typeref(expr->base.type);
2229 if (is_type_void(type))
2232 ir_node *value = expression_to_value(expr->value);
2233 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2234 type_t *const from_type = skip_typeref(expr->value->base.type);
2235 ir_mode *const mode = get_ir_mode_storage(type);
2236 /* check for conversion from / to __based types */
2237 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2238 const variable_t *from_var = from_type->pointer.base_variable;
2239 const variable_t *to_var = type->pointer.base_variable;
2240 if (from_var != to_var) {
2241 if (from_var != NULL) {
2242 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2243 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2244 value = new_d_Add(dbgi, value, base, mode);
2246 if (to_var != NULL) {
2247 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2248 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2249 value = new_d_Sub(dbgi, value, base, mode);
2254 return create_conv(dbgi, value, mode);
2257 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2259 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2260 type_t *const type = skip_typeref(expr->base.type);
2261 ir_mode *const mode = get_ir_mode_arithmetic(type);
2262 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2263 return new_d_Not(dbgi, value, mode);
2266 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2268 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2269 ir_node *value = expression_to_value(expr->value);
2270 type_t *const value_type = skip_typeref(expr->value->base.type);
2271 assert(is_type_pointer(value_type));
2273 /* check for __based */
2274 variable_t const *const base_var = value_type->pointer.base_variable;
2276 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2277 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2278 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2280 type_t *const points_to = value_type->pointer.points_to;
2281 return deref_address(dbgi, points_to, value);
2284 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2286 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2287 type_t *const type = skip_typeref(expr->base.type);
2288 ir_mode *const mode = get_ir_mode_arithmetic(type);
2289 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2290 return new_d_Minus(dbgi, value, mode);
2293 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2294 ir_node *value, type_t *type)
2296 ir_mode *const mode = get_ir_mode_storage(type_ptrdiff_t);
2297 assert(is_type_pointer(type));
2298 pointer_type_t *const pointer_type = &type->pointer;
2299 type_t *const points_to = skip_typeref(pointer_type->points_to);
2300 ir_node * elem_size = get_type_size_node(points_to);
2301 elem_size = create_conv(dbgi, elem_size, mode);
2302 value = create_conv(dbgi, value, mode);
2303 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2307 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2310 ir_node *pin = new_Pin(new_NoMem());
2311 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2312 op_pin_state_floats);
2313 return new_d_Proj(dbgi, op, mode, pn_Div_res);
2316 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2319 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2320 type_t *const type_left = skip_typeref(expr->left->base.type);
2321 type_t *const type_right = skip_typeref(expr->right->base.type);
2322 expression_kind_t const kind = expr->base.kind;
2324 case EXPR_BINARY_SHIFTLEFT:
2325 case EXPR_BINARY_SHIFTRIGHT:
2326 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2327 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2328 mode = get_ir_mode_arithmetic(expr->base.type);
2329 left = create_conv(dbgi, left, mode);
2330 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2333 case EXPR_BINARY_SUB:
2334 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2335 const pointer_type_t *const ptr_type = &type_left->pointer;
2337 mode = get_ir_mode_storage(expr->base.type);
2338 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2339 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2340 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2341 ir_node *const no_mem = new_NoMem();
2342 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2343 mode, op_pin_state_floats);
2344 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2347 case EXPR_BINARY_SUB_ASSIGN:
2348 if (is_type_pointer(type_left)) {
2349 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2350 mode = get_ir_mode_storage(type_left);
2355 case EXPR_BINARY_ADD:
2356 case EXPR_BINARY_ADD_ASSIGN:
2357 if (is_type_pointer(type_left)) {
2358 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2359 mode = get_ir_mode_storage(type_left);
2361 } else if (is_type_pointer(type_right)) {
2362 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2363 mode = get_ir_mode_storage(type_right);
2370 mode = get_ir_mode_arithmetic(type_right);
2371 left = create_conv(dbgi, left, mode);
2372 right = create_conv(dbgi, right, mode);
2377 case EXPR_BINARY_ADD_ASSIGN:
2378 case EXPR_BINARY_ADD:
2379 return new_d_Add(dbgi, left, right, mode);
2380 case EXPR_BINARY_SUB_ASSIGN:
2381 case EXPR_BINARY_SUB:
2382 return new_d_Sub(dbgi, left, right, mode);
2383 case EXPR_BINARY_MUL_ASSIGN:
2384 case EXPR_BINARY_MUL:
2385 return new_d_Mul(dbgi, left, right, mode);
2386 case EXPR_BINARY_DIV:
2387 case EXPR_BINARY_DIV_ASSIGN:
2388 return create_div(dbgi, left, right, mode);
2389 case EXPR_BINARY_BITWISE_AND:
2390 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2391 return new_d_And(dbgi, left, right, mode);
2392 case EXPR_BINARY_BITWISE_OR:
2393 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2394 return new_d_Or(dbgi, left, right, mode);
2395 case EXPR_BINARY_BITWISE_XOR:
2396 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2397 return new_d_Eor(dbgi, left, right, mode);
2398 case EXPR_BINARY_SHIFTLEFT:
2399 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2400 return new_d_Shl(dbgi, left, right, mode);
2401 case EXPR_BINARY_SHIFTRIGHT:
2402 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2403 if (mode_is_signed(mode)) {
2404 return new_d_Shrs(dbgi, left, right, mode);
2406 return new_d_Shr(dbgi, left, right, mode);
2408 case EXPR_BINARY_MOD:
2409 case EXPR_BINARY_MOD_ASSIGN: {
2410 ir_node *pin = new_Pin(new_NoMem());
2411 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2412 op_pin_state_floats);
2413 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2417 panic("unexpected expression kind");
2421 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2423 ir_node *const left = expression_to_value(expr->left);
2424 ir_node *const right = expression_to_value(expr->right);
2425 return create_op(expr, left, right);
2429 * Check if a given expression is a GNU __builtin_expect() call.
2431 static bool is_builtin_expect(const expression_t *expression)
2433 if (expression->kind != EXPR_CALL)
2436 expression_t *function = expression->call.function;
2437 if (function->kind != EXPR_REFERENCE)
2439 reference_expression_t *ref = &function->reference;
2440 if (ref->entity->kind != ENTITY_FUNCTION ||
2441 ref->entity->function.btk != BUILTIN_EXPECT)
2447 static void compare_to_control_flow(expression_t const *const expr, ir_node *const left, ir_node *const right, ir_relation const relation, jump_target *const true_target, jump_target *const false_target)
2449 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2450 ir_node *const cmp = new_d_Cmp(dbgi, left, right, relation);
2451 if (is_Const(cmp)) {
2452 if (tarval_is_null(get_Const_tarval(cmp))) {
2453 jump_to_target(false_target);
2455 jump_to_target(true_target);
2458 ir_node *const cond = new_d_Cond(dbgi, cmp);
2459 ir_node *const true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2460 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2462 /* set branch prediction info based on __builtin_expect */
2463 if (is_builtin_expect(expr) && is_Cond(cond)) {
2464 call_argument_t *const argument = expr->call.arguments->next;
2465 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2466 bool const cnst = fold_constant_to_bool(argument->expression);
2467 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2468 set_Cond_jmp_pred(cond, pred);
2472 add_pred_to_jump_target(true_target, true_proj);
2473 add_pred_to_jump_target(false_target, false_proj);
2475 set_unreachable_now();
2478 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2480 ir_node *val = NULL;
2481 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2482 ir_mode *const mode = get_ir_mode_storage(expr->base.type);
2483 jump_target exit_target;
2484 init_jump_target(&exit_target, NULL);
2486 if (enter_jump_target(true_target)) {
2487 jump_to_target(&exit_target);
2488 val = new_d_Const(dbgi, get_mode_one(mode));
2491 if (enter_jump_target(false_target)) {
2492 jump_to_target(&exit_target);
2493 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2495 ir_node *const in[] = { val, zero };
2496 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2502 if (!enter_jump_target(&exit_target)) {
2503 set_cur_block(new_Block(0, NULL));
2504 val = new_d_Bad(dbgi, mode);
2509 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2511 ir_node *const right = expression_to_value(expr->right);
2512 expression_t const *const left_expr = expr->left;
2513 ir_node *const addr = expression_to_addr(left_expr);
2514 ir_node *const left = get_value_from_lvalue(left_expr, addr);
2515 ir_node *result = create_op(expr, left, right);
2517 type_t *const type = skip_typeref(expr->base.type);
2518 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2519 jump_target true_target;
2520 jump_target false_target;
2521 init_jump_target(&true_target, NULL);
2522 init_jump_target(&false_target, NULL);
2523 ir_mode *const mode = get_irn_mode(result);
2524 ir_node *const zero = new_Const(get_mode_null(mode));
2525 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2526 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2529 return set_value_for_expression_addr(left_expr, result, addr);
2532 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2534 ir_node *const addr = expression_to_addr(expr->left);
2535 ir_node *const right = expression_to_value(expr->right);
2536 return set_value_for_expression_addr(expr->left, right, addr);
2539 /** evaluate an expression and discard the result, but still produce the
2541 static void evaluate_expression_discard_result(const expression_t *expression)
2543 type_t *type = skip_typeref(expression->base.type);
2544 if (is_type_complex(type)) {
2545 expression_to_complex(expression);
2547 expression_to_value(expression);
2551 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2553 evaluate_expression_discard_result(expr->left);
2554 return expression_to_value(expr->right);
2557 static ir_node *array_access_addr(const array_access_expression_t *expression)
2559 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2560 ir_node *base_addr = expression_to_value(expression->array_ref);
2561 ir_node *offset = expression_to_value(expression->index);
2562 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2563 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2564 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2569 static ir_node *array_access_to_firm(
2570 const array_access_expression_t *expression)
2572 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2573 ir_node *addr = array_access_addr(expression);
2574 type_t *type = revert_automatic_type_conversion(
2575 (const expression_t*) expression);
2576 type = skip_typeref(type);
2578 return deref_address(dbgi, type, addr);
2581 static long get_offsetof_offset(const offsetof_expression_t *expression)
2583 type_t *orig_type = expression->type;
2586 designator_t *designator = expression->designator;
2587 for ( ; designator != NULL; designator = designator->next) {
2588 type_t *type = skip_typeref(orig_type);
2589 /* be sure the type is constructed */
2590 (void) get_ir_type(type);
2592 if (designator->symbol != NULL) {
2593 assert(is_type_compound(type));
2594 symbol_t *symbol = designator->symbol;
2596 compound_t *compound = type->compound.compound;
2597 entity_t *iter = compound->members.entities;
2598 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2600 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2601 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2602 offset += get_entity_offset(iter->compound_member.entity);
2604 orig_type = iter->declaration.type;
2606 expression_t *array_index = designator->array_index;
2607 assert(designator->array_index != NULL);
2608 assert(is_type_array(type));
2610 long index = fold_constant_to_int(array_index);
2611 ir_type *arr_type = get_ir_type(type);
2612 ir_type *elem_type = get_array_element_type(arr_type);
2613 long elem_size = get_type_size_bytes(elem_type);
2615 offset += index * elem_size;
2617 orig_type = type->array.element_type;
2624 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2626 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2627 long offset = get_offsetof_offset(expression);
2628 ir_tarval *tv = new_tarval_from_long(offset, mode);
2629 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2631 return new_d_Const(dbgi, tv);
2634 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2635 ir_entity *entity, type_t *type);
2636 static ir_initializer_t *create_ir_initializer(
2637 const initializer_t *initializer, type_t *type);
2639 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2640 initializer_t *initializer,
2643 /* create the ir_initializer */
2644 PUSH_IRG(get_const_code_irg());
2645 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2648 ident *const id = id_unique("initializer.%u");
2649 ir_type *const irtype = get_ir_type(type);
2650 ir_type *const global_type = get_glob_type();
2651 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2652 set_entity_ld_ident(entity, id);
2653 set_entity_visibility(entity, ir_visibility_private);
2654 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2655 set_entity_initializer(entity, irinitializer);
2659 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2661 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2662 type_t *type = expression->type;
2663 initializer_t *initializer = expression->initializer;
2665 if (expression->global_scope ||
2666 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2667 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2668 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2669 return create_symconst(dbgi, entity);
2671 /* create an entity on the stack */
2672 ident *const id = id_unique("CompLit.%u");
2673 ir_type *const irtype = get_ir_type(type);
2674 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2676 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2677 set_entity_ld_ident(entity, id);
2679 /* create initialisation code */
2680 create_local_initializer(initializer, dbgi, entity, type);
2682 /* create a sel for the compound literal address */
2683 ir_node *frame = get_irg_frame(current_ir_graph);
2684 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2689 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2691 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2692 type_t *const type = expr->type;
2693 ir_node *const addr = compound_literal_addr(expr);
2694 return deref_address(dbgi, type, addr);
2698 * Transform a sizeof expression into Firm code.
2700 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2702 type_t *const type = skip_typeref(expression->type);
2703 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2704 if (is_type_array(type) && type->array.is_vla
2705 && expression->tp_expression != NULL) {
2706 expression_to_value(expression->tp_expression);
2709 return get_type_size_node(type);
2712 static entity_t *get_expression_entity(const expression_t *expression)
2714 if (expression->kind != EXPR_REFERENCE)
2717 return expression->reference.entity;
2720 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2722 switch (entity->kind) {
2723 case DECLARATION_KIND_CASES:
2724 return entity->declaration.alignment;
2727 return entity->compound.alignment;
2728 case ENTITY_TYPEDEF:
2729 return entity->typedefe.alignment;
2737 * Transform an alignof expression into Firm code.
2739 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2741 unsigned alignment = 0;
2743 const expression_t *tp_expression = expression->tp_expression;
2744 if (tp_expression != NULL) {
2745 entity_t *entity = get_expression_entity(tp_expression);
2746 if (entity != NULL) {
2747 alignment = get_cparser_entity_alignment(entity);
2751 if (alignment == 0) {
2752 type_t *type = expression->type;
2753 alignment = get_type_alignment(type);
2756 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2757 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2758 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2759 return new_d_Const(dbgi, tv);
2762 static void init_ir_types(void);
2764 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2766 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2768 bool constant_folding_old = constant_folding;
2769 constant_folding = true;
2770 int old_optimize = get_optimize();
2771 int old_constant_folding = get_opt_constant_folding();
2773 set_opt_constant_folding(1);
2777 PUSH_IRG(get_const_code_irg());
2778 ir_node *const cnst = expression_to_value(expression);
2781 set_optimize(old_optimize);
2782 set_opt_constant_folding(old_constant_folding);
2783 constant_folding = constant_folding_old;
2785 if (!is_Const(cnst))
2786 panic("couldn't fold constant");
2787 return get_Const_tarval(cnst);
2790 static complex_constant fold_complex_constant(const expression_t *expression)
2792 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2794 bool constant_folding_old = constant_folding;
2795 constant_folding = true;
2796 int old_optimize = get_optimize();
2797 int old_constant_folding = get_opt_constant_folding();
2799 set_opt_constant_folding(1);
2803 PUSH_IRG(get_const_code_irg());
2804 complex_value value = expression_to_complex(expression);
2807 set_optimize(old_optimize);
2808 set_opt_constant_folding(old_constant_folding);
2810 if (!is_Const(value.real) || !is_Const(value.imag)) {
2811 panic("couldn't fold constant");
2814 constant_folding = constant_folding_old;
2816 return (complex_constant) {
2817 get_Const_tarval(value.real),
2818 get_Const_tarval(value.imag)
2822 /* this function is only used in parser.c, but it relies on libfirm functionality */
2823 bool constant_is_negative(const expression_t *expression)
2825 ir_tarval *tv = fold_constant_to_tarval(expression);
2826 return tarval_is_negative(tv);
2829 long fold_constant_to_int(const expression_t *expression)
2831 ir_tarval *tv = fold_constant_to_tarval(expression);
2832 if (!tarval_is_long(tv)) {
2833 panic("result of constant folding is not integer");
2836 return get_tarval_long(tv);
2839 bool fold_constant_to_bool(const expression_t *expression)
2841 type_t *type = skip_typeref(expression->base.type);
2842 if (is_type_complex(type)) {
2843 complex_constant tvs = fold_complex_constant(expression);
2844 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2846 ir_tarval *tv = fold_constant_to_tarval(expression);
2847 return !tarval_is_null(tv);
2851 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2853 jump_target true_target;
2854 jump_target false_target;
2855 init_jump_target(&true_target, NULL);
2856 init_jump_target(&false_target, NULL);
2857 ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2859 ir_node *val = NULL;
2860 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2861 type_t *const type = skip_typeref(expression->base.type);
2862 ir_mode *const mode = get_ir_mode_arithmetic(type);
2863 jump_target exit_target;
2864 init_jump_target(&exit_target, NULL);
2866 if (enter_jump_target(&true_target)) {
2867 if (expression->true_expression) {
2868 val = expression_to_value(expression->true_expression);
2869 } else if (cond_expr) {
2872 /* Condition ended with a short circuit (&&, ||, !) operation or a
2873 * comparison. Generate a "1" as value for the true branch. */
2874 val = new_Const(get_mode_one(mode));
2877 val = create_conv(dbgi, val, mode);
2878 jump_to_target(&exit_target);
2881 if (enter_jump_target(&false_target)) {
2882 ir_node *false_val = expression_to_value(expression->false_expression);
2884 false_val = create_conv(dbgi, false_val, mode);
2885 jump_to_target(&exit_target);
2887 ir_node *const in[] = { val, false_val };
2888 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2894 if (!enter_jump_target(&exit_target)) {
2895 set_cur_block(new_Block(0, NULL));
2896 if (!is_type_void(type))
2897 val = new_Bad(mode);
2903 * Returns an IR-node representing the address of a field.
2905 static ir_node *select_addr(const select_expression_t *expression)
2907 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2909 construct_select_compound(expression);
2911 ir_node *compound_addr = expression_to_value(expression->compound);
2913 entity_t *entry = expression->compound_entry;
2914 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2915 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2917 if (constant_folding) {
2918 ir_mode *mode = get_irn_mode(compound_addr);
2919 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2920 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2921 return new_d_Add(dbgi, compound_addr, ofs, mode);
2923 ir_entity *irentity = entry->compound_member.entity;
2924 assert(irentity != NULL);
2925 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2929 static ir_node *select_to_firm(const select_expression_t *expression)
2931 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2932 ir_node *addr = select_addr(expression);
2933 type_t *type = revert_automatic_type_conversion(
2934 (const expression_t*) expression);
2935 type = skip_typeref(type);
2937 entity_t *entry = expression->compound_entry;
2938 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2940 if (entry->compound_member.bitfield) {
2941 return bitfield_extract_to_firm(expression, addr);
2944 return deref_address(dbgi, type, addr);
2947 /* Values returned by __builtin_classify_type. */
2948 typedef enum gcc_type_class
2954 enumeral_type_class,
2957 reference_type_class,
2961 function_type_class,
2972 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2974 type_t *type = expr->type_expression->base.type;
2976 /* FIXME gcc returns different values depending on whether compiling C or C++
2977 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2980 type = skip_typeref(type);
2981 switch (type->kind) {
2983 const atomic_type_t *const atomic_type = &type->atomic;
2984 switch (atomic_type->akind) {
2985 /* gcc cannot do that */
2986 case ATOMIC_TYPE_VOID:
2987 tc = void_type_class;
2990 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2991 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2992 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2993 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2994 case ATOMIC_TYPE_SHORT:
2995 case ATOMIC_TYPE_USHORT:
2996 case ATOMIC_TYPE_INT:
2997 case ATOMIC_TYPE_UINT:
2998 case ATOMIC_TYPE_LONG:
2999 case ATOMIC_TYPE_ULONG:
3000 case ATOMIC_TYPE_LONGLONG:
3001 case ATOMIC_TYPE_ULONGLONG:
3002 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3003 tc = integer_type_class;
3006 case ATOMIC_TYPE_FLOAT:
3007 case ATOMIC_TYPE_DOUBLE:
3008 case ATOMIC_TYPE_LONG_DOUBLE:
3009 tc = real_type_class;
3012 panic("Unexpected atomic type.");
3015 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3016 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3017 case TYPE_ARRAY: /* gcc handles this as pointer */
3018 case TYPE_FUNCTION: /* gcc handles this as pointer */
3019 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3020 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3021 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3023 /* gcc handles this as integer */
3024 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3026 /* gcc classifies the referenced type */
3027 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3029 /* typedef/typeof should be skipped already */
3035 panic("unexpected type.");
3039 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3040 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3041 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3042 return new_d_Const(dbgi, tv);
3045 static ir_node *function_name_to_firm(
3046 const funcname_expression_t *const expr)
3048 switch (expr->kind) {
3049 case FUNCNAME_FUNCTION:
3050 case FUNCNAME_PRETTY_FUNCTION:
3051 case FUNCNAME_FUNCDNAME:
3052 if (current_function_name == NULL) {
3053 position_t const *const src_pos = &expr->base.pos;
3054 char const *const name = current_function_entity->base.symbol->string;
3055 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3056 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3058 return current_function_name;
3059 case FUNCNAME_FUNCSIG:
3060 if (current_funcsig == NULL) {
3061 position_t const *const src_pos = &expr->base.pos;
3062 ir_entity *const ent = get_irg_entity(current_ir_graph);
3063 char const *const name = get_entity_ld_name(ent);
3064 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3065 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3067 return current_funcsig;
3069 panic("Unsupported function name");
3072 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3074 statement_t *statement = expr->statement;
3076 assert(statement->kind == STATEMENT_COMPOUND);
3077 return compound_statement_to_firm(&statement->compound);
3080 static ir_node *va_start_expression_to_firm(
3081 const va_start_expression_t *const expr)
3083 ir_entity *param_ent = current_vararg_entity;
3084 if (param_ent == NULL) {
3085 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3086 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3087 ir_type *const param_type = get_unknown_type();
3088 param_ent = new_parameter_entity(frame_type, n, param_type);
3089 current_vararg_entity = param_ent;
3092 ir_node *const frame = get_irg_frame(current_ir_graph);
3093 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3094 ir_node *const no_mem = new_NoMem();
3095 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3097 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3102 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3104 type_t *const type = expr->base.type;
3105 expression_t *const ap_expr = expr->ap;
3106 ir_node *const ap_addr = expression_to_addr(ap_expr);
3107 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3108 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3109 ir_node *const res = deref_address(dbgi, type, ap);
3111 ir_node *const cnst = get_type_size_node(expr->base.type);
3112 ir_mode *const mode = get_irn_mode(cnst);
3113 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3114 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3115 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3116 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3117 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3119 set_value_for_expression_addr(ap_expr, add, ap_addr);
3125 * Generate Firm for a va_copy expression.
3127 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3129 ir_node *const src = expression_to_value(expr->src);
3130 set_value_for_expression_addr(expr->dst, src, NULL);
3134 static ir_node *dereference_addr(const unary_expression_t *const expression)
3136 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3137 return expression_to_value(expression->value);
3141 * Returns a IR-node representing an lvalue of the given expression.
3143 static ir_node *expression_to_addr(const expression_t *expression)
3145 switch (expression->kind) {
3146 case EXPR_ARRAY_ACCESS:
3147 return array_access_addr(&expression->array_access);
3148 case EXPR_COMPOUND_LITERAL:
3149 return compound_literal_addr(&expression->compound_literal);
3150 case EXPR_REFERENCE:
3151 return reference_addr(&expression->reference);
3153 return select_addr(&expression->select);
3154 case EXPR_UNARY_DEREFERENCE:
3155 return dereference_addr(&expression->unary);
3159 panic("trying to get address of non-lvalue");
3162 static ir_node *builtin_constant_to_firm(
3163 const builtin_constant_expression_t *expression)
3165 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3166 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3167 return create_Const_from_bool(mode, v);
3170 static ir_node *builtin_types_compatible_to_firm(
3171 const builtin_types_compatible_expression_t *expression)
3173 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3174 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3175 bool const value = types_compatible(left, right);
3176 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3177 return create_Const_from_bool(mode, value);
3180 static void prepare_label_target(label_t *const label)
3182 if (label->address_taken && !label->indirect_block) {
3183 ir_node *const iblock = new_immBlock();
3184 label->indirect_block = iblock;
3185 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3186 jump_from_block_to_target(&label->target, iblock);
3191 * Pointer to a label. This is used for the
3192 * GNU address-of-label extension.
3194 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3196 /* Beware: Might be called from create initializer with current_ir_graph
3197 * set to const_code_irg. */
3198 PUSH_IRG(current_function);
3199 prepare_label_target(label->label);
3202 symconst_symbol value;
3203 value.entity_p = create_Block_entity(label->label->indirect_block);
3204 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3205 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3208 static ir_node *expression_to_value(expression_t const *const expr)
3211 if (!constant_folding) {
3212 assert(!expr->base.transformed);
3213 ((expression_t*)expr)->base.transformed = true;
3215 assert(!is_type_complex(skip_typeref(expr->base.type)));
3218 switch (expr->kind) {
3219 case EXPR_UNARY_CAST:
3220 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3221 case EXPR_BINARY_EQUAL:
3222 case EXPR_BINARY_GREATER:
3223 case EXPR_BINARY_GREATEREQUAL:
3224 case EXPR_BINARY_ISGREATER:
3225 case EXPR_BINARY_ISGREATEREQUAL:
3226 case EXPR_BINARY_ISLESS:
3227 case EXPR_BINARY_ISLESSEQUAL:
3228 case EXPR_BINARY_ISLESSGREATER:
3229 case EXPR_BINARY_ISUNORDERED:
3230 case EXPR_BINARY_LESS:
3231 case EXPR_BINARY_LESSEQUAL:
3232 case EXPR_BINARY_LOGICAL_AND:
3233 case EXPR_BINARY_LOGICAL_OR:
3234 case EXPR_BINARY_NOTEQUAL:
3235 case EXPR_UNARY_NOT:;
3236 jump_target true_target;
3237 jump_target false_target;
3238 init_jump_target(&true_target, NULL);
3239 init_jump_target(&false_target, NULL);
3240 expression_to_control_flow(expr, &true_target, &false_target);
3241 return control_flow_to_1_0(expr, &true_target, &false_target);
3243 return create_cast(&expr->unary);
3246 case EXPR_BINARY_ADD:
3247 case EXPR_BINARY_BITWISE_AND:
3248 case EXPR_BINARY_BITWISE_OR:
3249 case EXPR_BINARY_BITWISE_XOR:
3250 case EXPR_BINARY_DIV:
3251 case EXPR_BINARY_MOD:
3252 case EXPR_BINARY_MUL:
3253 case EXPR_BINARY_SHIFTLEFT:
3254 case EXPR_BINARY_SHIFTRIGHT:
3255 case EXPR_BINARY_SUB:
3256 return binop_to_firm(&expr->binary);
3258 case EXPR_BINARY_ADD_ASSIGN:
3259 case EXPR_BINARY_BITWISE_AND_ASSIGN:
3260 case EXPR_BINARY_BITWISE_OR_ASSIGN:
3261 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3262 case EXPR_BINARY_DIV_ASSIGN:
3263 case EXPR_BINARY_MOD_ASSIGN:
3264 case EXPR_BINARY_MUL_ASSIGN:
3265 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3266 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3267 case EXPR_BINARY_SUB_ASSIGN:
3268 return binop_assign_to_firm(&expr->binary);
3273 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3274 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
3275 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
3276 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
3278 return incdec_to_firm(&expr->unary, inc, pre);
3281 case EXPR_UNARY_IMAG: {
3282 complex_value irvalue = expression_to_complex(expr->unary.value);
3283 return irvalue.imag;
3285 case EXPR_UNARY_REAL: {
3286 complex_value irvalue = expression_to_complex(expr->unary.value);
3287 return irvalue.real;
3290 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3291 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3292 case EXPR_BINARY_ASSIGN: return assign_expression_to_firm( &expr->binary);
3293 case EXPR_BINARY_COMMA: return comma_expression_to_firm( &expr->binary);
3294 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3295 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3296 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3297 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3298 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3299 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3300 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3301 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3302 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3303 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3304 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3305 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3306 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3307 case EXPR_SELECT: return select_to_firm( &expr->select);
3308 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3309 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3310 case EXPR_STRING_LITERAL: return string_to_firm( &expr->base.pos, "str.%u", &expr->string_literal.value);
3311 case EXPR_UNARY_ASSUME: return handle_assume( expr->unary.value);
3312 case EXPR_UNARY_COMPLEMENT: return complement_to_firm( &expr->unary);
3313 case EXPR_UNARY_DEREFERENCE: return dereference_to_firm( &expr->unary);
3314 case EXPR_UNARY_NEGATE: return negate_to_firm( &expr->unary);
3315 case EXPR_UNARY_PLUS: return expression_to_value( expr->unary.value);
3316 case EXPR_UNARY_TAKE_ADDRESS: return expression_to_addr( expr->unary.value);
3317 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3318 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3319 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3321 case EXPR_UNARY_DELETE:
3322 case EXPR_UNARY_DELETE_ARRAY:
3323 case EXPR_UNARY_THROW:
3324 panic("expression not implemented");
3329 panic("invalid expression");
3332 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3333 jump_target *const true_target, jump_target *const false_target,
3334 ir_relation relation);
3336 static complex_value create_complex_condition_evaluation(
3337 const expression_t *const expression, jump_target *const true_target,
3338 jump_target *const false_target);
3341 * create a short-circuit expression evaluation that tries to construct
3342 * efficient control flow structures for &&, || and ! expressions
3344 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3346 switch (expr->kind) {
3347 case EXPR_UNARY_NOT:
3348 expression_to_control_flow(expr->unary.value, false_target, true_target);
3351 case EXPR_BINARY_LOGICAL_AND: {
3352 jump_target extra_target;
3353 init_jump_target(&extra_target, NULL);
3354 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3355 if (enter_jump_target(&extra_target))
3356 expression_to_control_flow(expr->binary.right, true_target, false_target);
3360 case EXPR_BINARY_LOGICAL_OR: {
3361 jump_target extra_target;
3362 init_jump_target(&extra_target, NULL);
3363 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3364 if (enter_jump_target(&extra_target))
3365 expression_to_control_flow(expr->binary.right, true_target, false_target);
3369 case EXPR_BINARY_COMMA:
3370 evaluate_expression_discard_result(expr->binary.left);
3371 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3376 ir_relation relation;
3378 case EXPR_BINARY_EQUAL:
3379 case EXPR_BINARY_GREATER:
3380 case EXPR_BINARY_GREATEREQUAL:
3381 case EXPR_BINARY_ISGREATER:
3382 case EXPR_BINARY_ISGREATEREQUAL:
3383 case EXPR_BINARY_ISLESS:
3384 case EXPR_BINARY_ISLESSEQUAL:
3385 case EXPR_BINARY_ISLESSGREATER:
3386 case EXPR_BINARY_ISUNORDERED:
3387 case EXPR_BINARY_LESS:
3388 case EXPR_BINARY_LESSEQUAL:
3389 case EXPR_BINARY_NOTEQUAL: {
3390 type_t *const type = skip_typeref(expr->binary.left->base.type);
3391 relation = get_relation(expr->kind);
3392 if (is_type_complex(type)) {
3393 complex_equality_evaluation(&expr->binary, true_target,
3394 false_target, relation);
3395 /* TODO return something sensible */
3399 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3400 ir_mode *const mode = get_ir_mode_arithmetic(type);
3402 left = create_conv(dbgi, expression_to_value(expr->binary.left), mode);
3403 right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3407 case EXPR_UNARY_CAST:
3408 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3409 expression_to_control_flow(expr->unary.value, true_target, false_target);
3413 type_t *const type = skip_typeref(expr->base.type);
3414 if (is_type_complex(type)) {
3415 create_complex_condition_evaluation(expr, true_target, false_target);
3419 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3420 ir_mode *const mode = get_ir_mode_arithmetic(type);
3421 val = create_conv(dbgi, expression_to_value(expr), mode);
3423 right = new_Const(get_mode_null(get_irn_mode(val)));
3424 relation = ir_relation_unordered_less_greater;
3426 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3432 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3435 return (complex_value) {
3436 create_conv(dbgi, value.real, mode),
3437 create_conv(dbgi, value.imag, mode)
3441 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3442 complex_value const value, type_t *const type)
3444 ir_mode *const mode = get_complex_mode_storage(type);
3445 return complex_conv(dbgi, value, mode);
3448 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3449 complex_value value)
3451 value = complex_conv_to_storage(dbgi, value, type);
3452 ir_graph *irg = current_ir_graph;
3453 ir_type *irtype = get_ir_type(type);
3454 ir_node *mem = get_store();
3455 ir_node *nomem = get_irg_no_mem(irg);
3456 ir_mode *mode = get_complex_mode_storage(type);
3457 ir_node *real = create_conv(dbgi, value.real, mode);
3458 ir_node *imag = create_conv(dbgi, value.imag, mode);
3459 ir_node *storer = new_d_Store(dbgi, mem, addr, real, cons_floats);
3460 ir_node *memr = new_Proj(storer, mode_M, pn_Store_M);
3462 ir_node *mem2 = get_store();
3463 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3464 ir_node *one = new_Const(get_mode_one(mode_uint));
3465 ir_node *in[1] = { one };
3466 ir_entity *arrent = get_array_element_entity(irtype);
3467 ir_node *addri = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3468 ir_node *storei = new_d_Store(dbgi, mem2, addri, imag, cons_floats);
3469 ir_node *memi = new_Proj(storei, mode_M, pn_Store_M);
3473 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3474 complex_value value)
3476 ir_graph *irg = current_ir_graph;
3477 ir_type *frame_type = get_irg_frame_type(irg);
3478 ident *id = id_unique("cmplex_tmp.%u");
3479 ir_type *irtype = get_ir_type(type);
3480 ir_entity *tmp_storage = new_entity(frame_type, id, irtype);
3481 set_entity_compiler_generated(tmp_storage, 1);
3482 ir_node *frame = get_irg_frame(irg);
3483 ir_node *nomem = get_irg_no_mem(irg);
3484 ir_node *addr = new_simpleSel(nomem, frame, tmp_storage);
3485 store_complex(dbgi, addr, type, value);
3489 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3491 assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3492 || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3493 type_t *const type = skip_typeref(entity->declaration.type);
3494 ir_mode *const mode = get_complex_mode_storage(type);
3495 ir_node *const real = get_value(entity->variable.v.value_number, mode);
3496 ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3497 ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3498 return (complex_value) {
3499 create_conv(dbgi, real, mode_arithmetic),
3500 create_conv(dbgi, imag, mode_arithmetic)
3504 static complex_value complex_deref_address(dbg_info *const dbgi,
3505 type_t *type, ir_node *const addr,
3506 ir_cons_flags flags)
3508 type = skip_typeref(type);
3509 assert(is_type_complex(type));
3511 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3512 flags |= cons_volatile;
3513 ir_mode *const mode = get_complex_mode_storage(type);
3514 ir_node *const memory = get_store();
3515 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
3516 ir_node *const load_mem = new_Proj(load, mode_M, pn_Load_M);
3517 ir_node *const load_res = new_Proj(load, mode, pn_Load_res);
3518 set_store(load_mem);
3520 ir_type *const irtype = get_ir_type(type);
3521 ir_mode *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3522 ir_node *const in[1] = { new_Const(get_mode_one(mode_uint)) };
3523 ir_entity *const entity = get_array_element_entity(irtype);
3524 ir_node *const nomem = get_irg_no_mem(current_ir_graph);
3525 ir_node *const addr2 = new_Sel(nomem, addr, 1, in, entity);
3526 ir_node *const mem2 = get_store();
3527 ir_node *const load2 = new_d_Load(dbgi, mem2, addr2, mode, flags);
3528 ir_node *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3529 ir_node *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3530 set_store(load_mem2);
3532 return (complex_value) { load_res, load_res2 };
3535 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3537 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
3538 entity_t *const entity = ref->entity;
3539 assert(is_declaration(entity));
3541 switch ((declaration_kind_t)entity->declaration.kind) {
3542 case DECLARATION_KIND_LOCAL_VARIABLE:
3543 case DECLARATION_KIND_PARAMETER:
3544 return read_localvar_complex(dbgi, entity);
3546 ir_node *const addr = reference_addr(ref);
3547 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3552 static complex_value complex_select_to_firm(const select_expression_t *select)
3554 dbg_info *dbgi = get_dbg_info(&select->base.pos);
3555 ir_node *addr = select_addr(select);
3556 type_t *type = skip_typeref(select->base.type);
3557 assert(is_type_complex(type));
3558 return complex_deref_address(dbgi, type, addr, cons_none);
3561 static complex_value complex_array_access_to_firm(
3562 const array_access_expression_t *expression)
3564 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3565 ir_node *addr = array_access_addr(expression);
3566 type_t *type = skip_typeref(expression->base.type);
3567 assert(is_type_complex(type));
3568 return complex_deref_address(dbgi, type, addr, cons_none);
3571 static complex_value get_complex_from_lvalue(const expression_t *expression,
3574 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3576 if (expression->kind == EXPR_REFERENCE) {
3577 const reference_expression_t *ref = &expression->reference;
3579 entity_t *entity = ref->entity;
3580 assert(entity->kind == ENTITY_VARIABLE
3581 || entity->kind == ENTITY_PARAMETER);
3582 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3583 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3584 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3585 return read_localvar_complex(dbgi, entity);
3589 assert(addr != NULL);
3590 return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3593 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3595 const expression_t *value = expression->value;
3596 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3597 type_t *from_type = skip_typeref(value->base.type);
3598 type_t *to_type = skip_typeref(expression->base.type);
3599 ir_mode *mode = get_complex_mode_storage(to_type);
3601 assert(is_type_complex(to_type));
3603 if (is_type_complex(from_type)) {
3604 complex_value cvalue = expression_to_complex(value);
3605 return complex_conv(dbgi, cvalue, mode);
3607 ir_node *value_node = expression_to_value(value);
3608 ir_node *zero = new_Const(get_mode_null(mode));
3609 ir_node *casted = create_conv(dbgi, value_node, mode);
3610 return (complex_value) { casted, zero };
3614 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3616 type_t *type = skip_typeref(literal->base.type);
3617 ir_mode *mode = get_complex_mode_storage(type);
3618 ir_node *litvalue = literal_to_firm_(literal, mode);
3619 ir_node *zero = new_Const(get_mode_null(mode));
3620 return (complex_value) { zero, litvalue };
3623 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3624 complex_value right, ir_mode *mode);
3626 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3627 complex_value right, ir_mode *mode)
3629 return (complex_value) {
3630 new_d_Add(dbgi, left.real, right.real, mode),
3631 new_d_Add(dbgi, left.imag, right.imag, mode)
3635 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3636 complex_value right, ir_mode *mode)
3638 return (complex_value) {
3639 new_d_Sub(dbgi, left.real, right.real, mode),
3640 new_d_Sub(dbgi, left.imag, right.imag, mode)
3644 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3645 complex_value right, ir_mode *mode)
3647 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3648 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3649 ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3650 ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3651 return (complex_value) {
3652 new_d_Sub(dbgi, op1, op2, mode),
3653 new_d_Add(dbgi, op3, op4, mode)
3657 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3658 complex_value right, ir_mode *mode)
3660 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3661 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3662 ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3663 ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3664 ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3665 ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3666 ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3667 ir_node *const real_divisor = new_d_Add(dbgi, op5, op6, mode);
3668 ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3669 ir_node *const imag_divisor = new_d_Add(dbgi, op5, op6, mode);
3670 return (complex_value) {
3671 create_div(dbgi, real_dividend, real_divisor, mode),
3672 create_div(dbgi, imag_dividend, imag_divisor, mode)
3676 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3679 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3682 ir_node *one = new_Const(get_mode_one(mode));
3683 return (complex_value) {
3684 new_d_Add(dbgi, value.real, one, mode),
3689 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3692 ir_node *one = new_Const(get_mode_one(mode));
3693 return (complex_value) {
3694 new_d_Sub(dbgi, value.real, one, mode),
3699 static void set_complex_value_for_expression(dbg_info *dbgi,
3700 const expression_t *expression,
3701 complex_value value,
3704 type_t *type = skip_typeref(expression->base.type);
3705 assert(is_type_complex(type));
3707 ir_mode *mode = get_complex_mode_storage(type);
3708 ir_node *real = create_conv(dbgi, value.real, mode);
3709 ir_node *imag = create_conv(dbgi, value.imag, mode);
3711 if (expression->kind == EXPR_REFERENCE) {
3712 const reference_expression_t *ref = &expression->reference;
3714 entity_t *entity = ref->entity;
3715 assert(is_declaration(entity));
3716 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3717 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3718 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3719 set_value(entity->variable.v.value_number, real);
3720 set_value(entity->variable.v.value_number+1, imag);
3726 addr = expression_to_addr(expression);
3727 assert(addr != NULL);
3728 store_complex(dbgi, addr, type, value);
3731 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3732 new_complex_unop constructor,
3735 dbg_info *const dbgi = get_dbg_info(&unop->base.pos);
3736 const expression_t *value_expr = unop->value;
3737 ir_node *addr = expression_to_addr(value_expr);
3738 complex_value value = get_complex_from_lvalue(value_expr, addr);
3739 type_t *type = skip_typeref(unop->base.type);
3740 ir_mode *mode = get_complex_mode_arithmetic(type);
3741 value = complex_conv(dbgi, value, mode);
3742 complex_value new_value = constructor(dbgi, value, mode);
3743 set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3744 return return_old ? value : new_value;
3747 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3749 complex_value cvalue = expression_to_complex(expr->value);
3750 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3751 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3752 cvalue = complex_conv(dbgi, cvalue, mode);
3753 return (complex_value) {
3754 new_d_Minus(dbgi, cvalue.real, mode),
3755 new_d_Minus(dbgi, cvalue.imag, mode)
3759 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3761 complex_value cvalue = expression_to_complex(expr->value);
3762 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3763 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3764 cvalue = complex_conv(dbgi, cvalue, mode);
3765 return (complex_value) {
3767 new_d_Minus(dbgi, cvalue.imag, mode)
3771 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3772 new_complex_binop constructor)
3774 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3775 ir_mode *mode = get_complex_mode_arithmetic(binexpr->base.type);
3776 complex_value left = expression_to_complex(binexpr->left);
3777 complex_value right = expression_to_complex(binexpr->right);
3778 left = complex_conv(dbgi, left, mode);
3779 right = complex_conv(dbgi, right, mode);
3780 return constructor(dbgi, left, right, mode);
3783 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3784 new_complex_binop constructor)
3786 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3787 expression_t *lefte = binexpr->left;
3788 expression_t *righte = binexpr->right;
3789 ir_mode *mode = get_complex_mode_arithmetic(righte->base.type);
3790 ir_node *addr = expression_to_addr(lefte);
3791 complex_value left = get_complex_from_lvalue(lefte, addr);
3792 complex_value right = expression_to_complex(righte);
3793 left = complex_conv(dbgi, left, mode);
3794 right = complex_conv(dbgi, right, mode);
3795 complex_value new_value = constructor(dbgi, left, right, mode);
3796 type_t *res_type = skip_typeref(binexpr->base.type);
3797 set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3798 return complex_conv_to_storage(dbgi, new_value, res_type);
3801 static complex_value complex_call_to_firm(const call_expression_t *call)
3803 ir_node *result = call_expression_to_firm(call);
3804 expression_t *function = call->function;
3805 type_t *type = skip_typeref(function->base.type);
3806 assert(is_type_pointer(type));
3807 pointer_type_t *pointer_type = &type->pointer;
3808 type_t *points_to = skip_typeref(pointer_type->points_to);
3809 assert(is_type_function(points_to));
3810 function_type_t *function_type = &points_to->function;
3811 type_t *return_type = skip_typeref(function_type->return_type);
3812 assert(is_type_complex(return_type));
3813 dbg_info *dbgi = get_dbg_info(&call->base.pos);
3814 return complex_deref_address(dbgi, return_type, result, cons_floats);
3817 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3818 jump_target *const true_target, jump_target *const false_target,
3819 ir_relation relation)
3821 jump_target extra_target;
3822 init_jump_target(&extra_target, NULL);
3824 complex_value left = expression_to_complex(binexpr->left);
3825 complex_value right = expression_to_complex(binexpr->right);
3826 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3827 ir_mode *mode = get_complex_mode_arithmetic(binexpr->left->base.type);
3828 left = complex_conv(dbgi, left, mode);
3829 right = complex_conv(dbgi, right, mode);
3831 ir_node *cmp_real = new_d_Cmp(dbgi, left.real, right.real, relation);
3832 ir_node *cond = new_d_Cond(dbgi, cmp_real);
3833 ir_node *true_proj = new_Proj(cond, mode_X, pn_Cond_true);
3834 ir_node *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3835 add_pred_to_jump_target(&extra_target, true_proj);
3836 add_pred_to_jump_target(false_target, false_proj);
3837 if (!enter_jump_target(&extra_target))
3840 ir_node *cmp_imag = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3841 ir_node *condi = new_d_Cond(dbgi, cmp_imag);
3842 ir_node *true_proj_i = new_Proj(condi, mode_X, pn_Cond_true);
3843 ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3844 add_pred_to_jump_target(true_target, true_proj_i);
3845 add_pred_to_jump_target(false_target, false_proj_i);
3846 set_unreachable_now();
3849 static complex_value create_complex_condition_evaluation(
3850 const expression_t *const expression, jump_target *const true_target,
3851 jump_target *const false_target)
3853 jump_target extra_target;
3854 init_jump_target(&extra_target, NULL);
3855 complex_value value = expression_to_complex(expression);
3856 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3857 type_t *const type = expression->base.type;
3858 ir_mode *const mode = get_complex_mode_arithmetic(type);
3859 value = complex_conv(dbgi, value, mode);
3860 ir_node *const zero = new_Const(get_mode_null(mode));
3861 ir_node *const cmp_real =
3862 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3863 ir_node *const cond_real = new_d_Cond(dbgi, cmp_real);
3864 ir_node *const true_real = new_Proj(cond_real, mode_X, pn_Cond_true);
3865 ir_node *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3866 add_pred_to_jump_target(true_target, true_real);
3867 add_pred_to_jump_target(&extra_target, false_real);
3868 if (!enter_jump_target(&extra_target))
3871 ir_node *const cmp_imag =
3872 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3873 ir_node *const cond_imag = new_d_Cond(dbgi, cmp_imag);
3874 ir_node *const true_imag = new_Proj(cond_imag, mode_X, pn_Cond_true);
3875 ir_node *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3876 add_pred_to_jump_target(true_target, true_imag);
3877 add_pred_to_jump_target(false_target, false_imag);
3878 set_unreachable_now();
3883 static complex_value complex_conditional_to_firm(
3884 const conditional_expression_t *const expression)
3886 /* first try to fold a constant condition */
3887 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3888 bool val = fold_constant_to_bool(expression->condition);
3890 expression_t *true_expression = expression->true_expression;
3891 if (true_expression == NULL) {
3892 /* we will evaluate true_expression a second time here, but in
3893 * this case it is harmless since constant expression have no
3895 true_expression = expression->condition;
3897 return expression_to_complex(true_expression);
3899 return expression_to_complex(expression->false_expression);
3903 jump_target true_target;
3904 jump_target false_target;
3905 init_jump_target(&true_target, NULL);
3906 init_jump_target(&false_target, NULL);
3907 complex_value cond_val;
3908 memset(&cond_val, 0, sizeof(cond_val));
3909 if (expression->true_expression == NULL) {
3910 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3912 = create_complex_condition_evaluation(expression->condition,
3913 &true_target, &false_target);
3915 expression_to_control_flow(expression->condition, &true_target, &false_target);
3919 memset(&val, 0, sizeof(val));
3920 jump_target exit_target;
3921 init_jump_target(&exit_target, NULL);
3923 if (enter_jump_target(&true_target)) {
3924 if (expression->true_expression) {
3925 val = expression_to_complex(expression->true_expression);
3927 assert(cond_val.real != NULL);
3930 jump_to_target(&exit_target);
3933 type_t *const type = skip_typeref(expression->base.type);
3934 if (enter_jump_target(&false_target)) {
3935 complex_value false_val
3936 = expression_to_complex(expression->false_expression);
3937 jump_to_target(&exit_target);
3938 if (val.real != NULL) {
3939 ir_node *const inr[] = { val.real, false_val.real };
3940 ir_node *const ini[] = { val.imag, false_val.imag };
3941 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3942 ir_mode *const mode = get_complex_mode_arithmetic(type);
3943 ir_node *const block = exit_target.block;
3944 val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3945 val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3951 if (!enter_jump_target(&exit_target)) {
3952 set_cur_block(new_Block(0, NULL));
3953 assert(!is_type_void(type));
3954 ir_mode *mode = get_complex_mode_arithmetic(type);
3955 val.real = new_Unknown(mode);
3956 val.imag = val.real;
3961 static complex_value expression_to_complex(const expression_t *expression)
3963 switch (expression->kind) {
3964 case EXPR_REFERENCE:
3965 return complex_reference_to_firm(&expression->reference);
3967 return complex_select_to_firm(&expression->select);
3968 case EXPR_ARRAY_ACCESS:
3969 return complex_array_access_to_firm(&expression->array_access);
3970 case EXPR_UNARY_CAST:
3971 return complex_cast_to_firm(&expression->unary);
3972 case EXPR_BINARY_COMMA:
3973 evaluate_expression_discard_result(expression->binary.left);
3974 return expression_to_complex(expression->binary.right);
3975 case EXPR_BINARY_ADD:
3976 return create_complex_binop(&expression->binary, new_complex_add);
3977 case EXPR_BINARY_ADD_ASSIGN:
3978 return create_complex_assign_binop(&expression->binary, new_complex_add);
3979 case EXPR_BINARY_SUB:
3980 return create_complex_binop(&expression->binary, new_complex_sub);
3981 case EXPR_BINARY_SUB_ASSIGN:
3982 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3983 case EXPR_BINARY_MUL:
3984 return create_complex_binop(&expression->binary, new_complex_mul);
3985 case EXPR_BINARY_MUL_ASSIGN:
3986 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3987 case EXPR_BINARY_DIV:
3988 return create_complex_binop(&expression->binary, new_complex_div);
3989 case EXPR_BINARY_DIV_ASSIGN:
3990 return create_complex_assign_binop(&expression->binary, new_complex_div);
3991 case EXPR_UNARY_PLUS:
3992 return expression_to_complex(expression->unary.value);
3993 case EXPR_UNARY_PREFIX_INCREMENT:
3994 return create_complex_assign_unop(&expression->unary,
3995 new_complex_increment, false);
3996 case EXPR_UNARY_PREFIX_DECREMENT:
3997 return create_complex_assign_unop(&expression->unary,
3998 new_complex_decrement, false);
3999 case EXPR_UNARY_POSTFIX_INCREMENT:
4000 return create_complex_assign_unop(&expression->unary,
4001 new_complex_increment, true);
4002 case EXPR_UNARY_POSTFIX_DECREMENT:
4003 return create_complex_assign_unop(&expression->unary,
4004 new_complex_decrement, true);
4005 case EXPR_UNARY_NEGATE:
4006 return complex_negate_to_firm(&expression->unary);
4007 case EXPR_UNARY_COMPLEMENT:
4008 return complex_complement_to_firm(&expression->unary);
4009 case EXPR_BINARY_ASSIGN: {
4010 const binary_expression_t *binexpr = &expression->binary;
4011 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
4012 complex_value value = expression_to_complex(binexpr->right);
4013 ir_node *addr = expression_to_addr(binexpr->left);
4014 set_complex_value_for_expression(dbgi, binexpr->left, value, addr);
4017 case EXPR_LITERAL_CASES:
4018 return complex_literal_to_firm(&expression->literal);
4020 return complex_call_to_firm(&expression->call);
4021 case EXPR_CONDITIONAL:
4022 return complex_conditional_to_firm(&expression->conditional);
4027 panic("complex expression not implemented yet");
4032 static void create_variable_entity(entity_t *variable,
4033 declaration_kind_t declaration_kind,
4034 ir_type *parent_type)
4036 assert(variable->kind == ENTITY_VARIABLE);
4037 type_t *type = skip_typeref(variable->declaration.type);
4039 ident *const id = new_id_from_str(variable->base.symbol->string);
4040 ir_type *const irtype = get_ir_type(type);
4041 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
4042 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
4043 unsigned alignment = variable->declaration.alignment;
4045 set_entity_alignment(irentity, alignment);
4047 handle_decl_modifiers(irentity, variable);
4049 variable->declaration.kind = (unsigned char) declaration_kind;
4050 variable->variable.v.entity = irentity;
4051 set_entity_ld_ident(irentity, create_ld_ident(variable));
4053 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4054 set_entity_volatility(irentity, volatility_is_volatile);
4059 typedef struct type_path_entry_t type_path_entry_t;
4060 struct type_path_entry_t {
4062 ir_initializer_t *initializer;
4064 entity_t *compound_entry;
4067 typedef struct type_path_t type_path_t;
4068 struct type_path_t {
4069 type_path_entry_t *path;
4074 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
4076 size_t len = ARR_LEN(path->path);
4078 for (size_t i = 0; i < len; ++i) {
4079 const type_path_entry_t *entry = & path->path[i];
4081 type_t *type = skip_typeref(entry->type);
4082 if (is_type_compound(type)) {
4083 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
4084 } else if (is_type_array(type)) {
4085 fprintf(stderr, "[%u]", (unsigned) entry->index);
4087 fprintf(stderr, "-INVALID-");
4090 fprintf(stderr, " (");
4091 print_type(path->top_type);
4092 fprintf(stderr, ")");
4095 static type_path_entry_t *get_type_path_top(const type_path_t *path)
4097 size_t len = ARR_LEN(path->path);
4099 return & path->path[len-1];
4102 static type_path_entry_t *append_to_type_path(type_path_t *path)
4104 size_t len = ARR_LEN(path->path);
4105 ARR_RESIZE(type_path_entry_t, path->path, len+1);
4107 type_path_entry_t *result = & path->path[len];
4108 memset(result, 0, sizeof(result[0]));
4112 static size_t get_compound_member_count(const compound_type_t *type)
4114 compound_t *compound = type->compound;
4115 size_t n_members = 0;
4116 entity_t *member = compound->members.entities;
4117 for ( ; member != NULL; member = member->base.next) {
4124 static ir_initializer_t *get_initializer_entry(type_path_t *path)
4126 type_t *orig_top_type = path->top_type;
4127 type_t *top_type = skip_typeref(orig_top_type);
4129 assert(is_type_compound(top_type) || is_type_array(top_type));
4131 if (ARR_LEN(path->path) == 0) {
4134 type_path_entry_t *top = get_type_path_top(path);
4135 ir_initializer_t *initializer = top->initializer;
4136 return get_initializer_compound_value(initializer, top->index);
4140 static void descend_into_subtype(type_path_t *path)
4142 type_t *orig_top_type = path->top_type;
4143 type_t *top_type = skip_typeref(orig_top_type);
4145 assert(is_type_compound(top_type) || is_type_array(top_type));
4147 ir_initializer_t *initializer = get_initializer_entry(path);
4149 type_path_entry_t *top = append_to_type_path(path);
4150 top->type = top_type;
4154 if (is_type_compound(top_type)) {
4155 compound_t *const compound = top_type->compound.compound;
4156 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
4158 top->compound_entry = entry;
4160 len = get_compound_member_count(&top_type->compound);
4161 if (entry != NULL) {
4162 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4163 path->top_type = entry->declaration.type;
4166 assert(is_type_array(top_type));
4167 assert(top_type->array.size > 0);
4170 path->top_type = top_type->array.element_type;
4171 len = top_type->array.size;
4173 if (initializer == NULL
4174 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
4175 initializer = create_initializer_compound(len);
4176 /* we have to set the entry at the 2nd latest path entry... */
4177 size_t path_len = ARR_LEN(path->path);
4178 assert(path_len >= 1);
4180 type_path_entry_t *entry = & path->path[path_len-2];
4181 ir_initializer_t *tinitializer = entry->initializer;
4182 set_initializer_compound_value(tinitializer, entry->index,
4186 top->initializer = initializer;
4189 static void ascend_from_subtype(type_path_t *path)
4191 type_path_entry_t *top = get_type_path_top(path);
4193 path->top_type = top->type;
4195 size_t len = ARR_LEN(path->path);
4196 ARR_RESIZE(type_path_entry_t, path->path, len-1);
4199 static void walk_designator(type_path_t *path, const designator_t *designator)
4201 /* designators start at current object type */
4202 ARR_RESIZE(type_path_entry_t, path->path, 1);
4204 for ( ; designator != NULL; designator = designator->next) {
4205 type_path_entry_t *top = get_type_path_top(path);
4206 type_t *orig_type = top->type;
4207 type_t *type = skip_typeref(orig_type);
4209 if (designator->symbol != NULL) {
4210 assert(is_type_compound(type));
4212 symbol_t *symbol = designator->symbol;
4214 compound_t *compound = type->compound.compound;
4215 entity_t *iter = compound->members.entities;
4216 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
4217 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
4219 /* revert previous initialisations of other union elements */
4220 if (type->kind == TYPE_COMPOUND_UNION) {
4221 ir_initializer_t *initializer = top->initializer;
4222 if (initializer != NULL
4223 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
4224 /* are we writing to a new element? */
4225 ir_initializer_t *oldi
4226 = get_initializer_compound_value(initializer, index);
4227 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
4228 /* clear initializer */
4230 = get_initializer_compound_n_entries(initializer);
4231 ir_initializer_t *nulli = get_initializer_null();
4232 for (size_t i = 0; i < len; ++i) {
4233 set_initializer_compound_value(initializer, i,
4240 top->type = orig_type;
4241 top->compound_entry = iter;
4243 orig_type = iter->declaration.type;
4245 expression_t *array_index = designator->array_index;
4246 assert(is_type_array(type));
4248 long index = fold_constant_to_int(array_index);
4249 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
4251 top->type = orig_type;
4252 top->index = (size_t) index;
4253 orig_type = type->array.element_type;
4255 path->top_type = orig_type;
4257 if (designator->next != NULL) {
4258 descend_into_subtype(path);
4262 path->invalid = false;
4265 static void advance_current_object(type_path_t *path)
4267 if (path->invalid) {
4268 /* TODO: handle this... */
4269 panic("invalid initializer (excessive elements)");
4272 type_path_entry_t *top = get_type_path_top(path);
4274 type_t *type = skip_typeref(top->type);
4275 if (is_type_union(type)) {
4276 /* only the first element is initialized in unions */
4277 top->compound_entry = NULL;
4278 } else if (is_type_struct(type)) {
4279 entity_t *entry = top->compound_entry;
4282 entry = skip_unnamed_bitfields(entry->base.next);
4283 top->compound_entry = entry;
4284 if (entry != NULL) {
4285 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4286 path->top_type = entry->declaration.type;
4290 assert(is_type_array(type));
4293 if (!type->array.size_constant || top->index < type->array.size) {
4298 /* we're past the last member of the current sub-aggregate, try if we
4299 * can ascend in the type hierarchy and continue with another subobject */
4300 size_t len = ARR_LEN(path->path);
4303 ascend_from_subtype(path);
4304 advance_current_object(path);
4306 path->invalid = true;
4311 static ir_initializer_t *create_ir_initializer_value(
4312 const initializer_value_t *initializer)
4314 expression_t *expr = initializer->value;
4315 type_t *type = skip_typeref(expr->base.type);
4317 if (is_type_compound(type)) {
4318 if (expr->kind == EXPR_UNARY_CAST) {
4319 expr = expr->unary.value;
4320 type = skip_typeref(expr->base.type);
4322 /* must be a compound literal... */
4323 if (expr->kind == EXPR_COMPOUND_LITERAL) {
4324 return create_ir_initializer(expr->compound_literal.initializer,
4327 } else if (is_type_complex(type)) {
4328 complex_value const value = expression_to_complex(expr);
4329 ir_mode *const mode = get_complex_mode_storage(type);
4330 ir_node *const real = create_conv(NULL, value.real, mode);
4331 ir_node *const imag = create_conv(NULL, value.imag, mode);
4332 ir_initializer_t *const res = create_initializer_compound(2);
4333 ir_initializer_t *const init_real = create_initializer_const(real);
4334 ir_initializer_t *const init_imag = create_initializer_const(imag);
4335 set_initializer_compound_value(res, 0, init_real);
4336 set_initializer_compound_value(res, 1, init_imag);
4340 ir_node *value = expression_to_value(expr);
4341 value = conv_to_storage_type(NULL, value, type);
4342 return create_initializer_const(value);
4345 /** Tests whether type can be initialized by a string constant */
4346 static bool is_string_type(type_t *type)
4348 if (!is_type_array(type))
4351 type_t *const inner = skip_typeref(type->array.element_type);
4352 return is_type_integer(inner);
4355 static ir_initializer_t *create_ir_initializer_list(
4356 const initializer_list_t *initializer, type_t *type)
4359 memset(&path, 0, sizeof(path));
4360 path.top_type = type;
4361 path.path = NEW_ARR_F(type_path_entry_t, 0);
4363 descend_into_subtype(&path);
4365 for (size_t i = 0; i < initializer->len; ++i) {
4366 const initializer_t *sub_initializer = initializer->initializers[i];
4368 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4369 walk_designator(&path, sub_initializer->designator.designator);
4373 if (sub_initializer->kind == INITIALIZER_VALUE) {
4374 const expression_t *expr = sub_initializer->value.value;
4375 const type_t *expr_type = skip_typeref(expr->base.type);
4376 /* we might have to descend into types until the types match */
4378 type_t *orig_top_type = path.top_type;
4379 type_t *top_type = skip_typeref(orig_top_type);
4381 if (types_compatible(top_type, expr_type))
4383 descend_into_subtype(&path);
4385 } else if (sub_initializer->kind == INITIALIZER_STRING) {
4386 /* we might have to descend into types until we're at a scalar
4389 type_t *orig_top_type = path.top_type;
4390 type_t *top_type = skip_typeref(orig_top_type);
4392 if (is_string_type(top_type))
4394 descend_into_subtype(&path);
4398 ir_initializer_t *sub_irinitializer
4399 = create_ir_initializer(sub_initializer, path.top_type);
4401 size_t path_len = ARR_LEN(path.path);
4402 assert(path_len >= 1);
4403 type_path_entry_t *entry = & path.path[path_len-1];
4404 ir_initializer_t *tinitializer = entry->initializer;
4405 set_initializer_compound_value(tinitializer, entry->index,
4408 advance_current_object(&path);
4411 assert(ARR_LEN(path.path) >= 1);
4412 ir_initializer_t *result = path.path[0].initializer;
4413 DEL_ARR_F(path.path);
4418 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
4420 type = skip_typeref(type);
4422 assert(type->kind == TYPE_ARRAY);
4423 assert(type->array.size_constant);
4424 string_literal_expression_t const *const str = get_init_string(init);
4425 size_t const str_len = str->value.size;
4426 size_t const arr_len = type->array.size;
4427 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
4428 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
4429 char const * p = str->value.begin;
4430 switch (str->value.encoding) {
4431 case STRING_ENCODING_CHAR:
4432 case STRING_ENCODING_UTF8:
4433 for (size_t i = 0; i != arr_len; ++i) {
4434 char const c = i < str_len ? *p++ : 0;
4435 ir_tarval *const tv = new_tarval_from_long(c, mode);
4436 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4437 set_initializer_compound_value(irinit, i, tvinit);
4441 case STRING_ENCODING_CHAR16:
4442 case STRING_ENCODING_CHAR32:
4443 case STRING_ENCODING_WIDE:
4444 for (size_t i = 0; i != arr_len; ++i) {
4445 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
4446 ir_tarval *const tv = new_tarval_from_long(c, mode);
4447 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4448 set_initializer_compound_value(irinit, i, tvinit);
4456 static ir_initializer_t *create_ir_initializer(
4457 const initializer_t *initializer, type_t *type)
4459 switch (initializer->kind) {
4460 case INITIALIZER_STRING:
4461 return create_ir_initializer_string(initializer, type);
4463 case INITIALIZER_LIST:
4464 return create_ir_initializer_list(&initializer->list, type);
4466 case INITIALIZER_VALUE:
4467 return create_ir_initializer_value(&initializer->value);
4469 case INITIALIZER_DESIGNATOR:
4470 panic("unexpected designator initializer");
4472 panic("unknown initializer");
4475 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4476 * are elements [...] the remainder of the aggregate shall be initialized
4477 * implicitly the same as objects that have static storage duration. */
4478 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4481 /* for unions we must NOT do anything for null initializers */
4482 ir_type *owner = get_entity_owner(entity);
4483 if (is_Union_type(owner)) {
4487 ir_type *ent_type = get_entity_type(entity);
4488 /* create sub-initializers for a compound type */
4489 if (is_compound_type(ent_type)) {
4490 unsigned n_members = get_compound_n_members(ent_type);
4491 for (unsigned n = 0; n < n_members; ++n) {
4492 ir_entity *member = get_compound_member(ent_type, n);
4493 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4495 create_dynamic_null_initializer(member, dbgi, addr);
4499 if (is_Array_type(ent_type)) {
4500 assert(has_array_upper_bound(ent_type, 0));
4501 long n = get_array_upper_bound_int(ent_type, 0);
4502 for (long i = 0; i < n; ++i) {
4503 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4504 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4505 ir_node *cnst = new_d_Const(dbgi, index_tv);
4506 ir_node *in[1] = { cnst };
4507 ir_entity *arrent = get_array_element_entity(ent_type);
4508 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4510 create_dynamic_null_initializer(arrent, dbgi, addr);
4515 ir_mode *value_mode = get_type_mode(ent_type);
4516 ir_node *node = new_Const(get_mode_null(value_mode));
4518 /* is it a bitfield type? */
4519 if (is_Primitive_type(ent_type) &&
4520 get_primitive_base_type(ent_type) != NULL) {
4521 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4525 ir_node *mem = get_store();
4526 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4527 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4531 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4532 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4534 switch (get_initializer_kind(initializer)) {
4535 case IR_INITIALIZER_NULL:
4536 create_dynamic_null_initializer(entity, dbgi, base_addr);
4538 case IR_INITIALIZER_CONST: {
4539 ir_node *node = get_initializer_const_value(initializer);
4540 ir_type *ent_type = get_entity_type(entity);
4542 /* is it a bitfield type? */
4543 if (is_Primitive_type(ent_type) &&
4544 get_primitive_base_type(ent_type) != NULL) {
4545 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4549 ir_node *mem = get_store();
4551 if (is_compound_type(ent_type)) {
4552 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
4553 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4555 assert(get_type_mode(type) == get_irn_mode(node));
4556 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4557 new_mem = new_Proj(store, mode_M, pn_Store_M);
4562 case IR_INITIALIZER_TARVAL: {
4563 ir_tarval *tv = get_initializer_tarval_value(initializer);
4564 ir_node *cnst = new_d_Const(dbgi, tv);
4565 ir_type *ent_type = get_entity_type(entity);
4567 /* is it a bitfield type? */
4568 if (is_Primitive_type(ent_type) &&
4569 get_primitive_base_type(ent_type) != NULL) {
4570 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4574 assert(get_type_mode(type) == get_tarval_mode(tv));
4575 ir_node *mem = get_store();
4576 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4577 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4581 case IR_INITIALIZER_COMPOUND: {
4582 assert(is_compound_type(type) || is_Array_type(type));
4584 if (is_Array_type(type)) {
4585 assert(has_array_upper_bound(type, 0));
4586 n_members = get_array_upper_bound_int(type, 0);
4588 n_members = get_compound_n_members(type);
4591 if (get_initializer_compound_n_entries(initializer)
4592 != (unsigned) n_members)
4593 panic("initializer doesn't match compound type");
4595 for (int i = 0; i < n_members; ++i) {
4598 ir_entity *sub_entity;
4599 if (is_Array_type(type)) {
4600 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4601 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4602 ir_node *cnst = new_d_Const(dbgi, index_tv);
4603 ir_node *in[1] = { cnst };
4604 irtype = get_array_element_type(type);
4605 sub_entity = get_array_element_entity(type);
4606 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4609 sub_entity = get_compound_member(type, i);
4610 irtype = get_entity_type(sub_entity);
4611 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4615 ir_initializer_t *sub_init
4616 = get_initializer_compound_value(initializer, i);
4618 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4625 panic("invalid ir_initializer");
4628 static void create_dynamic_initializer(ir_initializer_t *initializer,
4629 dbg_info *dbgi, ir_entity *entity)
4631 ir_node *frame = get_irg_frame(current_ir_graph);
4632 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4633 ir_type *type = get_entity_type(entity);
4635 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4638 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4639 ir_entity *entity, type_t *type)
4641 ir_node *memory = get_store();
4642 ir_node *nomem = new_NoMem();
4643 ir_node *frame = get_irg_frame(current_ir_graph);
4644 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4646 if (initializer->kind == INITIALIZER_VALUE) {
4647 initializer_value_t *initializer_value = &initializer->value;
4649 ir_node *value = expression_to_value(initializer_value->value);
4650 type = skip_typeref(type);
4651 assign_value(dbgi, addr, type, value);
4655 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4656 ir_initializer_t *irinitializer
4657 = create_ir_initializer(initializer, type);
4659 create_dynamic_initializer(irinitializer, dbgi, entity);
4663 /* create a "template" entity which is copied to the entity on the stack */
4664 ir_entity *const init_entity
4665 = create_initializer_entity(dbgi, initializer, type);
4666 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4667 ir_type *const irtype = get_ir_type(type);
4668 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4670 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4671 set_store(copyb_mem);
4674 static void create_initializer_local_variable_entity(entity_t *entity)
4676 assert(entity->kind == ENTITY_VARIABLE);
4677 initializer_t *initializer = entity->variable.initializer;
4678 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4679 ir_entity *irentity = entity->variable.v.entity;
4680 type_t *type = entity->declaration.type;
4682 create_local_initializer(initializer, dbgi, irentity, type);
4685 static void create_variable_initializer(entity_t *entity)
4687 assert(entity->kind == ENTITY_VARIABLE);
4688 initializer_t *initializer = entity->variable.initializer;
4689 if (initializer == NULL)
4692 declaration_kind_t declaration_kind
4693 = (declaration_kind_t) entity->declaration.kind;
4694 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4695 create_initializer_local_variable_entity(entity);
4699 type_t *type = entity->declaration.type;
4700 type_qualifiers_t tq = get_type_qualifier(type, true);
4702 if (initializer->kind == INITIALIZER_VALUE) {
4703 expression_t * value = initializer->value.value;
4704 type_t *const init_type = skip_typeref(value->base.type);
4706 if (is_type_complex(init_type)) {
4707 complex_value nodes = expression_to_complex(value);
4708 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4709 ir_mode *mode = get_complex_mode_storage(init_type);
4710 ir_node *real = create_conv(dbgi, nodes.real, mode);
4711 ir_node *imag = create_conv(dbgi, nodes.imag, mode);
4712 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4713 set_value(entity->variable.v.value_number, real);
4714 set_value(entity->variable.v.value_number+1, imag);
4716 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4717 ir_entity *irentity = entity->variable.v.entity;
4718 if (tq & TYPE_QUALIFIER_CONST
4719 && get_entity_owner(irentity) != get_tls_type()) {
4720 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4722 ir_initializer_t *initializer = create_initializer_compound(2);
4723 ir_initializer_t *reali = create_initializer_const(real);
4724 set_initializer_compound_value(initializer, 0, reali);
4725 ir_initializer_t *imagi = create_initializer_const(imag);
4726 set_initializer_compound_value(initializer, 1, imagi);
4727 set_entity_initializer(irentity, initializer);
4730 } else if (!is_type_scalar(init_type)) {
4731 if (value->kind != EXPR_COMPOUND_LITERAL)
4732 panic("expected non-scalar initializer to be a compound literal");
4733 initializer = value->compound_literal.initializer;
4734 goto have_initializer;
4737 ir_node * node = expression_to_value(value);
4738 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4739 node = conv_to_storage_type(dbgi, node, init_type);
4741 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4742 set_value(entity->variable.v.value_number, node);
4744 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4746 ir_entity *irentity = entity->variable.v.entity;
4748 if (tq & TYPE_QUALIFIER_CONST
4749 && get_entity_owner(irentity) != get_tls_type()) {
4750 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4752 set_atomic_ent_value(irentity, node);
4756 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4757 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4759 ir_entity *irentity = entity->variable.v.entity;
4760 ir_initializer_t *irinitializer
4761 = create_ir_initializer(initializer, type);
4763 if (tq & TYPE_QUALIFIER_CONST) {
4764 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4766 set_entity_initializer(irentity, irinitializer);
4770 static void create_variable_length_array(entity_t *entity)
4772 assert(entity->kind == ENTITY_VARIABLE);
4773 assert(entity->variable.initializer == NULL);
4775 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4776 entity->variable.v.vla_base = NULL;
4778 /* TODO: record VLA somewhere so we create the free node when we leave
4782 static void allocate_variable_length_array(entity_t *entity)
4784 assert(entity->kind == ENTITY_VARIABLE);
4785 assert(entity->variable.initializer == NULL);
4786 assert(currently_reachable());
4788 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4789 type_t *type = entity->declaration.type;
4790 ir_type *el_type = get_ir_type(type->array.element_type);
4792 /* make sure size_node is calculated */
4793 get_type_size_node(type);
4794 ir_node *elems = type->array.size_node;
4795 ir_node *mem = get_store();
4796 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4798 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4799 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4802 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4803 entity->variable.v.vla_base = addr;
4806 static bool var_needs_entity(variable_t const *const var)
4808 if (var->address_taken)
4810 type_t *const type = skip_typeref(var->base.type);
4811 return (!is_type_scalar(type) && !is_type_complex(type))
4812 || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4816 * Creates a Firm local variable from a declaration.
4818 static void create_local_variable(entity_t *entity)
4820 assert(entity->kind == ENTITY_VARIABLE);
4821 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4823 if (!var_needs_entity(&entity->variable)) {
4824 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4825 entity->variable.v.value_number = next_value_number_function;
4826 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4827 ++next_value_number_function;
4828 if (is_type_complex(skip_typeref(entity->declaration.type)))
4829 ++next_value_number_function;
4833 /* is it a variable length array? */
4834 type_t *const type = skip_typeref(entity->declaration.type);
4835 if (is_type_array(type) && !type->array.size_constant) {
4836 create_variable_length_array(entity);
4840 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4841 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4844 static void create_local_static_variable(entity_t *entity)
4846 assert(entity->kind == ENTITY_VARIABLE);
4847 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4849 type_t *type = skip_typeref(entity->declaration.type);
4850 ir_type *const var_type = entity->variable.thread_local ?
4851 get_tls_type() : get_glob_type();
4852 ir_type *const irtype = get_ir_type(type);
4853 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4855 size_t l = strlen(entity->base.symbol->string);
4856 char buf[l + sizeof(".%u")];
4857 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4858 ident *const id = id_unique(buf);
4859 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4861 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4862 set_entity_volatility(irentity, volatility_is_volatile);
4865 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4866 entity->variable.v.entity = irentity;
4868 set_entity_ld_ident(irentity, id);
4869 set_entity_visibility(irentity, ir_visibility_local);
4871 if (entity->variable.initializer == NULL) {
4872 ir_initializer_t *null_init = get_initializer_null();
4873 set_entity_initializer(irentity, null_init);
4876 PUSH_IRG(get_const_code_irg());
4877 create_variable_initializer(entity);
4881 static ir_node *return_statement_to_firm(return_statement_t *statement)
4883 if (!currently_reachable())
4886 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4887 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4891 if (is_type_void(type)) {
4892 /* just create the side effects, don't return anything */
4893 if (statement->value)
4894 evaluate_expression_discard_result(statement->value);
4897 } else if (is_type_complex(type)) {
4898 if (statement->value) {
4899 complex_value value = expression_to_complex(statement->value);
4900 in[0] = complex_to_memory(dbgi, type, value);
4902 in[0] = new_Unknown(mode_P_data);
4906 ir_mode *const mode = get_ir_mode_storage(type);
4907 if (statement->value) {
4908 ir_node *value = expression_to_value(statement->value);
4909 value = conv_to_storage_type(dbgi, value, type);
4910 in[0] = create_conv(dbgi, value, mode);
4912 in[0] = new_Unknown(mode);
4917 ir_node *const store = get_store();
4918 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4920 ir_node *end_block = get_irg_end_block(current_ir_graph);
4921 add_immBlock_pred(end_block, ret);
4923 set_unreachable_now();
4927 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4929 if (!currently_reachable())
4932 expression_t *expression = statement->expression;
4933 type_t *type = skip_typeref(expression->base.type);
4934 if (is_type_complex(type)) {
4935 expression_to_complex(expression);
4936 return NULL; /* TODO */
4938 return expression_to_value(statement->expression);
4942 static void create_local_declarations(entity_t*);
4944 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4946 create_local_declarations(compound->scope.entities);
4948 ir_node *result = NULL;
4949 statement_t *statement = compound->statements;
4950 for ( ; statement != NULL; statement = statement->base.next) {
4951 result = statement_to_firm(statement);
4957 static void create_global_variable(entity_t *entity)
4959 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4960 ir_visibility visibility = ir_visibility_external;
4961 storage_class_tag_t storage
4962 = (storage_class_tag_t)entity->declaration.storage_class;
4963 decl_modifiers_t modifiers = entity->declaration.modifiers;
4964 assert(entity->kind == ENTITY_VARIABLE);
4967 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4968 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4969 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4970 case STORAGE_CLASS_TYPEDEF:
4971 case STORAGE_CLASS_AUTO:
4972 case STORAGE_CLASS_REGISTER:
4973 panic("invalid storage class for global var");
4976 /* "common" symbols */
4977 if (storage == STORAGE_CLASS_NONE
4978 && entity->variable.initializer == NULL
4979 && !entity->variable.thread_local
4980 && (modifiers & DM_WEAK) == 0) {
4981 linkage |= IR_LINKAGE_MERGE;
4984 ir_type *var_type = get_glob_type();
4985 if (entity->variable.thread_local) {
4986 var_type = get_tls_type();
4988 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4989 ir_entity *irentity = entity->variable.v.entity;
4990 add_entity_linkage(irentity, linkage);
4991 set_entity_visibility(irentity, visibility);
4992 if (entity->variable.initializer == NULL
4993 && storage != STORAGE_CLASS_EXTERN) {
4994 ir_initializer_t *null_init = get_initializer_null();
4995 set_entity_initializer(irentity, null_init);
4999 static void create_local_declaration(entity_t *entity)
5001 assert(is_declaration(entity));
5003 /* construct type */
5004 (void) get_ir_type(entity->declaration.type);
5005 if (entity->base.symbol == NULL) {
5009 switch ((storage_class_tag_t) entity->declaration.storage_class) {
5010 case STORAGE_CLASS_STATIC:
5011 if (entity->kind == ENTITY_FUNCTION) {
5012 (void)get_function_entity(entity, NULL);
5014 create_local_static_variable(entity);
5017 case STORAGE_CLASS_EXTERN:
5018 if (entity->kind == ENTITY_FUNCTION) {
5019 assert(entity->function.body == NULL);
5020 (void)get_function_entity(entity, NULL);
5022 create_global_variable(entity);
5023 create_variable_initializer(entity);
5026 case STORAGE_CLASS_NONE:
5027 case STORAGE_CLASS_AUTO:
5028 case STORAGE_CLASS_REGISTER:
5029 if (entity->kind == ENTITY_FUNCTION) {
5030 if (entity->function.body != NULL) {
5031 ir_type *owner = get_irg_frame_type(current_ir_graph);
5032 (void)get_function_entity(entity, owner);
5033 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5034 enqueue_inner_function(entity);
5036 (void)get_function_entity(entity, NULL);
5039 create_local_variable(entity);
5042 case STORAGE_CLASS_TYPEDEF:
5045 panic("invalid storage class");
5048 static void create_local_declarations(entity_t *e)
5050 for (; e; e = e->base.next) {
5051 if (is_declaration(e))
5052 create_local_declaration(e);
5056 static void initialize_local_declaration(entity_t *entity)
5058 if (entity->base.symbol == NULL)
5061 // no need to emit code in dead blocks
5062 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5063 && !currently_reachable())
5066 switch ((declaration_kind_t) entity->declaration.kind) {
5067 case DECLARATION_KIND_LOCAL_VARIABLE:
5068 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5069 create_variable_initializer(entity);
5072 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5073 allocate_variable_length_array(entity);
5076 case DECLARATION_KIND_COMPOUND_MEMBER:
5077 case DECLARATION_KIND_GLOBAL_VARIABLE:
5078 case DECLARATION_KIND_FUNCTION:
5079 case DECLARATION_KIND_INNER_FUNCTION:
5082 case DECLARATION_KIND_PARAMETER:
5083 case DECLARATION_KIND_PARAMETER_ENTITY:
5084 panic("can't initialize parameters");
5086 case DECLARATION_KIND_UNKNOWN:
5087 panic("can't initialize unknown declaration");
5089 panic("invalid declaration kind");
5092 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5094 entity_t *entity = statement->declarations_begin;
5098 entity_t *const last = statement->declarations_end;
5099 for ( ;; entity = entity->base.next) {
5100 if (is_declaration(entity)) {
5101 initialize_local_declaration(entity);
5102 } else if (entity->kind == ENTITY_TYPEDEF) {
5103 /* ยง6.7.7:3 Any array size expressions associated with variable length
5104 * array declarators are evaluated each time the declaration of the
5105 * typedef name is reached in the order of execution. */
5106 type_t *const type = skip_typeref(entity->typedefe.type);
5107 if (is_type_array(type) && type->array.is_vla)
5108 get_vla_size(&type->array);
5117 static ir_node *if_statement_to_firm(if_statement_t *statement)
5119 create_local_declarations(statement->scope.entities);
5121 /* Create the condition. */
5122 jump_target true_target;
5123 jump_target false_target;
5124 init_jump_target(&true_target, NULL);
5125 init_jump_target(&false_target, NULL);
5126 if (currently_reachable())
5127 expression_to_control_flow(statement->condition, &true_target, &false_target);
5129 jump_target exit_target;
5130 init_jump_target(&exit_target, NULL);
5132 /* Create the true statement. */
5133 enter_jump_target(&true_target);
5134 statement_to_firm(statement->true_statement);
5135 jump_to_target(&exit_target);
5137 /* Create the false statement. */
5138 enter_jump_target(&false_target);
5139 if (statement->false_statement)
5140 statement_to_firm(statement->false_statement);
5141 jump_to_target(&exit_target);
5143 enter_jump_target(&exit_target);
5147 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5149 create_local_declarations(statement->scope.entities);
5152 PUSH_CONTINUE(NULL);
5154 expression_t *const cond = statement->condition;
5155 /* Avoid an explicit body block in case of do ... while (0);. */
5156 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
5157 /* do ... while (0);. */
5158 statement_to_firm(statement->body);
5159 jump_to_target(&continue_target);
5160 enter_jump_target(&continue_target);
5161 jump_to_target(&break_target);
5163 jump_target body_target;
5164 init_jump_target(&body_target, NULL);
5165 jump_to_target(&body_target);
5166 enter_immature_jump_target(&body_target);
5168 statement_to_firm(statement->body);
5169 jump_to_target(&continue_target);
5170 if (enter_jump_target(&continue_target))
5171 expression_to_control_flow(statement->condition, &body_target, &break_target);
5172 enter_jump_target(&body_target);
5174 enter_jump_target(&break_target);
5181 static ir_node *for_statement_to_firm(for_statement_t *statement)
5183 create_local_declarations(statement->scope.entities);
5185 if (currently_reachable()) {
5186 entity_t *entity = statement->scope.entities;
5187 for ( ; entity != NULL; entity = entity->base.next) {
5188 if (!is_declaration(entity))
5191 initialize_local_declaration(entity);
5194 if (statement->initialisation != NULL) {
5195 expression_to_value(statement->initialisation);
5199 /* Create the header block */
5200 jump_target header_target;
5201 init_jump_target(&header_target, NULL);
5202 jump_to_target(&header_target);
5203 enter_immature_jump_target(&header_target);
5206 expression_t *const step = statement->step;
5208 PUSH_CONTINUE(step ? NULL : header_target.block);
5210 /* Create the condition. */
5211 expression_t *const cond = statement->condition;
5212 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
5213 jump_target body_target;
5214 init_jump_target(&body_target, NULL);
5215 expression_to_control_flow(cond, &body_target, &break_target);
5216 enter_jump_target(&body_target);
5219 /* Create the loop body. */
5220 statement_to_firm(statement->body);
5221 jump_to_target(&continue_target);
5223 /* Create the step code. */
5224 if (step && enter_jump_target(&continue_target)) {
5225 expression_to_value(step);
5226 jump_to_target(&header_target);
5229 enter_jump_target(&header_target);
5230 enter_jump_target(&break_target);
5237 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5239 /* determine number of cases */
5241 for (case_label_statement_t *l = statement->first_case; l != NULL;
5244 if (l->expression == NULL)
5246 if (l->is_empty_range)
5251 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5253 for (case_label_statement_t *l = statement->first_case; l != NULL;
5255 if (l->expression == NULL) {
5256 l->pn = pn_Switch_default;
5259 if (l->is_empty_range)
5261 ir_tarval *min = l->first_case;
5262 ir_tarval *max = l->last_case;
5263 long pn = (long) i+1;
5264 ir_switch_table_set(res, i++, min, max, pn);
5270 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5272 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5273 ir_node *switch_node = NULL;
5275 if (currently_reachable()) {
5276 ir_node *expression = expression_to_value(statement->expression);
5277 ir_switch_table *table = create_switch_table(statement);
5278 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5280 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5283 set_unreachable_now();
5286 ir_node *const old_switch = current_switch;
5287 const bool old_saw_default_label = saw_default_label;
5288 saw_default_label = false;
5289 current_switch = switch_node;
5291 statement_to_firm(statement->body);
5292 jump_to_target(&break_target);
5294 if (!saw_default_label && switch_node) {
5295 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5296 add_pred_to_jump_target(&break_target, proj);
5299 enter_jump_target(&break_target);
5301 assert(current_switch == switch_node);
5302 current_switch = old_switch;
5303 saw_default_label = old_saw_default_label;
5308 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5310 if (current_switch != NULL && !statement->is_empty_range) {
5311 jump_target case_target;
5312 init_jump_target(&case_target, NULL);
5314 /* Fallthrough from previous case */
5315 jump_to_target(&case_target);
5317 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5318 add_pred_to_jump_target(&case_target, proj);
5319 if (statement->expression == NULL)
5320 saw_default_label = true;
5322 enter_jump_target(&case_target);
5325 return statement_to_firm(statement->statement);
5328 static ir_node *label_to_firm(const label_statement_t *statement)
5330 label_t *const label = statement->label;
5331 prepare_label_target(label);
5332 jump_to_target(&label->target);
5333 if (--label->n_users == 0) {
5334 enter_jump_target(&label->target);
5336 enter_immature_jump_target(&label->target);
5340 return statement_to_firm(statement->statement);
5343 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5345 label_t *const label = stmt->label;
5346 prepare_label_target(label);
5347 jump_to_target(&label->target);
5348 if (--label->n_users == 0)
5349 enter_jump_target(&label->target);
5350 set_unreachable_now();
5354 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5356 if (currently_reachable()) {
5357 ir_node *const op = expression_to_value(statement->expression);
5358 ARR_APP1(ir_node*, ijmp_ops, op);
5359 jump_to_target(&ijmp_target);
5360 set_unreachable_now();
5365 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5367 bool needs_memory = statement->is_volatile;
5368 size_t n_clobbers = 0;
5369 asm_clobber_t *clobber = statement->clobbers;
5370 for ( ; clobber != NULL; clobber = clobber->next) {
5371 const char *clobber_str = clobber->clobber.begin;
5373 if (!be_is_valid_clobber(clobber_str)) {
5374 errorf(&statement->base.pos,
5375 "invalid clobber '%s' specified", clobber->clobber);
5379 if (streq(clobber_str, "memory")) {
5380 needs_memory = true;
5384 ident *id = new_id_from_str(clobber_str);
5385 obstack_ptr_grow(&asm_obst, id);
5388 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5389 ident **clobbers = NULL;
5390 if (n_clobbers > 0) {
5391 clobbers = obstack_finish(&asm_obst);
5394 size_t n_inputs = 0;
5395 asm_argument_t *argument = statement->inputs;
5396 for ( ; argument != NULL; argument = argument->next)
5398 size_t n_outputs = 0;
5399 argument = statement->outputs;
5400 for ( ; argument != NULL; argument = argument->next)
5403 unsigned next_pos = 0;
5405 ir_node *ins[n_inputs + n_outputs + 1];
5408 ir_asm_constraint tmp_in_constraints[n_outputs];
5410 const expression_t *out_exprs[n_outputs];
5411 ir_node *out_addrs[n_outputs];
5412 size_t out_size = 0;
5414 argument = statement->outputs;
5415 for ( ; argument != NULL; argument = argument->next) {
5416 const char *constraints = argument->constraints.begin;
5417 asm_constraint_flags_t asm_flags
5418 = be_parse_asm_constraints(constraints);
5421 position_t const *const pos = &statement->base.pos;
5422 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5423 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5425 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5426 errorf(pos, "some constraints in '%s' are invalid", constraints);
5429 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5430 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5435 unsigned pos = next_pos++;
5436 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5437 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5438 expression_t *expr = argument->expression;
5439 ir_node *addr = expression_to_addr(expr);
5440 /* in+output, construct an artifical same_as constraint on the
5442 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5444 ir_node *value = get_value_from_lvalue(expr, addr);
5446 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5448 ir_asm_constraint constraint;
5449 constraint.pos = pos;
5450 constraint.constraint = new_id_from_str(buf);
5451 constraint.mode = get_ir_mode_storage(expr->base.type);
5452 tmp_in_constraints[in_size] = constraint;
5453 ins[in_size] = value;
5458 out_exprs[out_size] = expr;
5459 out_addrs[out_size] = addr;
5461 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5462 /* pure memory ops need no input (but we have to make sure we
5463 * attach to the memory) */
5464 assert(! (asm_flags &
5465 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5466 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5467 needs_memory = true;
5469 /* we need to attach the address to the inputs */
5470 expression_t *expr = argument->expression;
5472 ir_asm_constraint constraint;
5473 constraint.pos = pos;
5474 constraint.constraint = new_id_from_str(constraints);
5475 constraint.mode = mode_M;
5476 tmp_in_constraints[in_size] = constraint;
5478 ins[in_size] = expression_to_addr(expr);
5482 errorf(&statement->base.pos,
5483 "only modifiers but no place set in constraints '%s'",
5488 ir_asm_constraint constraint;
5489 constraint.pos = pos;
5490 constraint.constraint = new_id_from_str(constraints);
5491 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5493 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5495 assert(obstack_object_size(&asm_obst)
5496 == out_size * sizeof(ir_asm_constraint));
5497 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5500 obstack_grow(&asm_obst, tmp_in_constraints,
5501 in_size * sizeof(tmp_in_constraints[0]));
5502 /* find and count input and output arguments */
5503 argument = statement->inputs;
5504 for ( ; argument != NULL; argument = argument->next) {
5505 const char *constraints = argument->constraints.begin;
5506 asm_constraint_flags_t asm_flags
5507 = be_parse_asm_constraints(constraints);
5509 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5510 errorf(&statement->base.pos,
5511 "some constraints in '%s' are not supported", constraints);
5514 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5515 errorf(&statement->base.pos,
5516 "some constraints in '%s' are invalid", constraints);
5519 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5520 errorf(&statement->base.pos,
5521 "write flag specified for input constraints '%s'",
5527 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5528 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5529 /* we can treat this as "normal" input */
5530 input = expression_to_value(argument->expression);
5531 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5532 /* pure memory ops need no input (but we have to make sure we
5533 * attach to the memory) */
5534 assert(! (asm_flags &
5535 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5536 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5537 needs_memory = true;
5538 input = expression_to_addr(argument->expression);
5540 errorf(&statement->base.pos,
5541 "only modifiers but no place set in constraints '%s'",
5546 ir_asm_constraint constraint;
5547 constraint.pos = next_pos++;
5548 constraint.constraint = new_id_from_str(constraints);
5549 constraint.mode = get_irn_mode(input);
5551 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5552 ins[in_size++] = input;
5555 ir_node *mem = needs_memory ? get_store() : new_NoMem();
5556 assert(obstack_object_size(&asm_obst)
5557 == in_size * sizeof(ir_asm_constraint));
5558 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5560 /* create asm node */
5561 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5563 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5565 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5566 out_size, output_constraints,
5567 n_clobbers, clobbers, asm_text);
5569 if (statement->is_volatile) {
5570 set_irn_pinned(node, op_pin_state_pinned);
5572 set_irn_pinned(node, op_pin_state_floats);
5575 /* create output projs & connect them */
5577 ir_node *projm = new_Proj(node, mode_M, out_size);
5582 for (i = 0; i < out_size; ++i) {
5583 const expression_t *out_expr = out_exprs[i];
5585 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5586 ir_node *proj = new_Proj(node, mode, pn);
5587 ir_node *addr = out_addrs[i];
5589 set_value_for_expression_addr(out_expr, proj, addr);
5595 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5597 statement_to_firm(statement->try_statement);
5598 position_t const *const pos = &statement->base.pos;
5599 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5603 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5605 errorf(&statement->base.pos, "__leave not supported yet");
5610 * Transform a statement.
5612 static ir_node *statement_to_firm(statement_t *const stmt)
5615 assert(!stmt->base.transformed);
5616 stmt->base.transformed = true;
5619 switch (stmt->kind) {
5620 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5621 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5622 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5623 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5624 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5625 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5626 case STATEMENT_EMPTY: return NULL; /* nothing */
5627 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5628 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5629 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
5630 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5631 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5632 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5633 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5634 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5635 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5639 case STATEMENT_BREAK: tgt = &break_target; goto jump;
5640 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5642 jump_to_target(tgt);
5643 set_unreachable_now();
5647 case STATEMENT_ERROR: panic("error statement");
5649 panic("statement not implemented");
5652 static int count_local_variables(const entity_t *entity,
5653 const entity_t *const last)
5656 entity_t const *const end = last != NULL ? last->base.next : NULL;
5657 for (; entity != end; entity = entity->base.next) {
5658 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5659 !var_needs_entity(&entity->variable)) {
5661 if (is_type_complex(skip_typeref(entity->declaration.type)))
5668 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5670 int *const count = env;
5672 switch (stmt->kind) {
5673 case STATEMENT_DECLARATION: {
5674 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5675 *count += count_local_variables(decl_stmt->declarations_begin,
5676 decl_stmt->declarations_end);
5681 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5690 * Return the number of local (alias free) variables used by a function.
5692 static int get_function_n_local_vars(entity_t *entity)
5694 const function_t *function = &entity->function;
5697 /* count parameters */
5698 count += count_local_variables(function->parameters.entities, NULL);
5700 /* count local variables declared in body */
5701 walk_statements(function->body, count_local_variables_in_stmt, &count);
5706 * Build Firm code for the parameters of a function.
5708 static void initialize_function_parameters(entity_t *entity)
5710 assert(entity->kind == ENTITY_FUNCTION);
5711 ir_graph *irg = current_ir_graph;
5712 ir_node *args = get_irg_args(irg);
5714 ir_type *function_irtype;
5716 if (entity->function.need_closure) {
5717 /* add an extra parameter for the static link */
5718 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5721 /* Matze: IMO this is wrong, nested functions should have an own
5722 * type and not rely on strange parameters... */
5723 function_irtype = create_method_type(&entity->declaration.type->function, true);
5725 function_irtype = get_ir_type(entity->declaration.type);
5728 entity_t *parameter = entity->function.parameters.entities;
5729 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5730 if (parameter->kind != ENTITY_PARAMETER)
5733 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5734 type_t *type = skip_typeref(parameter->declaration.type);
5736 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5737 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5738 if (var_needs_entity(¶meter->variable)) {
5739 ir_type *frame_type = get_irg_frame_type(irg);
5741 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5742 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5743 parameter->variable.v.entity = param;
5744 } else if (is_type_complex(type)) {
5745 ir_type *frame_type = get_irg_frame_type(irg);
5747 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5748 ir_node *nomem = get_irg_no_mem(irg);
5749 ir_node *frame = get_irg_frame(irg);
5750 ir_node *addr = new_simpleSel(nomem, frame, param);
5751 complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5753 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5754 parameter->variable.v.value_number = next_value_number_function;
5755 set_irg_loc_description(irg, next_value_number_function,
5757 set_irg_loc_description(irg, next_value_number_function+1,
5759 set_value(next_value_number_function, value.real);
5760 set_value(next_value_number_function+1, value.imag);
5761 next_value_number_function += 2;
5763 ir_mode *param_mode = get_type_mode(param_irtype);
5765 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5766 value = conv_to_storage_type(dbgi, value, type);
5768 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5769 parameter->variable.v.value_number = next_value_number_function;
5770 set_irg_loc_description(irg, next_value_number_function,
5772 ++next_value_number_function;
5774 set_value(parameter->variable.v.value_number, value);
5779 static void add_function_pointer(ir_type *segment, ir_entity *method,
5780 const char *unique_template)
5782 ir_type *method_type = get_entity_type(method);
5783 ir_type *ptr_type = new_type_pointer(method_type);
5785 /* these entities don't really have a name but firm only allows
5787 * Note that we mustn't give these entities a name since for example
5788 * Mach-O doesn't allow them. */
5789 ident *ide = id_unique(unique_template);
5790 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5791 ir_graph *irg = get_const_code_irg();
5792 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5795 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5796 set_entity_compiler_generated(ptr, 1);
5797 set_entity_visibility(ptr, ir_visibility_private);
5798 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5799 set_atomic_ent_value(ptr, val);
5803 * Create code for a function and all inner functions.
5805 * @param entity the function entity
5807 static void create_function(entity_t *entity)
5809 assert(entity->kind == ENTITY_FUNCTION);
5810 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5812 if (entity->function.body == NULL)
5815 inner_functions = NULL;
5816 current_trampolines = NULL;
5818 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5819 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5820 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5822 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5823 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5824 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5827 current_function_entity = entity;
5828 current_function_name = NULL;
5829 current_funcsig = NULL;
5832 assert(!ijmp_blocks);
5833 init_jump_target(&ijmp_target, NULL);
5834 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5835 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5837 int n_local_vars = get_function_n_local_vars(entity);
5838 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5839 current_ir_graph = irg;
5841 ir_graph *old_current_function = current_function;
5842 current_function = irg;
5844 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5845 current_vararg_entity = NULL;
5847 set_irg_fp_model(irg, firm_fp_model);
5848 set_irn_dbg_info(get_irg_start_block(irg),
5849 get_entity_dbg_info(function_entity));
5851 next_value_number_function = 0;
5852 initialize_function_parameters(entity);
5853 current_static_link = entity->function.static_link;
5855 statement_to_firm(entity->function.body);
5857 ir_node *end_block = get_irg_end_block(irg);
5859 /* do we have a return statement yet? */
5860 if (currently_reachable()) {
5861 type_t *type = skip_typeref(entity->declaration.type);
5862 assert(is_type_function(type));
5863 type_t *const return_type = skip_typeref(type->function.return_type);
5866 if (is_type_void(return_type)) {
5867 ret = new_Return(get_store(), 0, NULL);
5869 ir_mode *const mode = get_ir_mode_storage(return_type);
5872 /* ยง5.1.2.2.3 main implicitly returns 0 */
5873 if (is_main(entity)) {
5874 in[0] = new_Const(get_mode_null(mode));
5876 in[0] = new_Unknown(mode);
5878 ret = new_Return(get_store(), 1, in);
5880 add_immBlock_pred(end_block, ret);
5883 if (enter_jump_target(&ijmp_target)) {
5885 size_t const n = ARR_LEN(ijmp_ops);
5886 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5887 ir_node *const ijmp = new_IJmp(op);
5888 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5889 ir_node *const block = ijmp_blocks[i];
5890 add_immBlock_pred(block, ijmp);
5891 mature_immBlock(block);
5895 DEL_ARR_F(ijmp_ops);
5896 DEL_ARR_F(ijmp_blocks);
5900 irg_finalize_cons(irg);
5902 /* finalize the frame type */
5903 ir_type *frame_type = get_irg_frame_type(irg);
5904 int n = get_compound_n_members(frame_type);
5907 for (int i = 0; i < n; ++i) {
5908 ir_entity *member = get_compound_member(frame_type, i);
5909 ir_type *entity_type = get_entity_type(member);
5911 int align = get_type_alignment_bytes(entity_type);
5912 if (align > align_all)
5916 misalign = offset % align;
5918 offset += align - misalign;
5922 set_entity_offset(member, offset);
5923 offset += get_type_size_bytes(entity_type);
5925 set_type_size_bytes(frame_type, offset);
5926 set_type_alignment_bytes(frame_type, align_all);
5928 irg_verify(irg, VERIFY_ENFORCE_SSA);
5929 current_vararg_entity = old_current_vararg_entity;
5930 current_function = old_current_function;
5932 if (current_trampolines != NULL) {
5933 DEL_ARR_F(current_trampolines);
5934 current_trampolines = NULL;
5937 /* create inner functions if any */
5938 entity_t **inner = inner_functions;
5939 if (inner != NULL) {
5940 ir_type *rem_outer_frame = current_outer_frame;
5941 current_outer_frame = get_irg_frame_type(current_ir_graph);
5942 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5943 create_function(inner[i]);
5947 current_outer_frame = rem_outer_frame;
5951 static void scope_to_firm(scope_t *scope)
5953 /* first pass: create declarations */
5954 entity_t *entity = scope->entities;
5955 for ( ; entity != NULL; entity = entity->base.next) {
5956 if (entity->base.symbol == NULL)
5959 if (entity->kind == ENTITY_FUNCTION) {
5960 if (entity->function.btk != BUILTIN_NONE) {
5961 /* builtins have no representation */
5964 (void)get_function_entity(entity, NULL);
5965 } else if (entity->kind == ENTITY_VARIABLE) {
5966 create_global_variable(entity);
5967 } else if (entity->kind == ENTITY_NAMESPACE) {
5968 scope_to_firm(&entity->namespacee.members);
5972 /* second pass: create code/initializers */
5973 entity = scope->entities;
5974 for ( ; entity != NULL; entity = entity->base.next) {
5975 if (entity->base.symbol == NULL)
5978 if (entity->kind == ENTITY_FUNCTION) {
5979 if (entity->function.btk != BUILTIN_NONE) {
5980 /* builtins have no representation */
5983 create_function(entity);
5984 } else if (entity->kind == ENTITY_VARIABLE) {
5985 assert(entity->declaration.kind
5986 == DECLARATION_KIND_GLOBAL_VARIABLE);
5987 current_ir_graph = get_const_code_irg();
5988 create_variable_initializer(entity);
5993 void init_ast2firm(void)
5995 obstack_init(&asm_obst);
5996 init_atomic_modes();
5998 ir_set_debug_retrieve(dbg_retrieve);
5999 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6001 /* create idents for all known runtime functions */
6002 for (size_t i = 0; i < lengthof(rts_data); ++i) {
6003 rts_idents[i] = new_id_from_str(rts_data[i].name);
6006 entitymap_init(&entitymap);
6009 static void init_ir_types(void)
6011 static int ir_types_initialized = 0;
6012 if (ir_types_initialized)
6014 ir_types_initialized = 1;
6016 ir_type_char = get_ir_type(type_char);
6018 be_params = be_get_backend_param();
6019 mode_float_arithmetic = be_params->mode_float_arithmetic;
6021 stack_param_align = be_params->stack_param_align;
6024 void exit_ast2firm(void)
6026 entitymap_destroy(&entitymap);
6027 obstack_free(&asm_obst, NULL);
6030 static void global_asm_to_firm(statement_t *s)
6032 for (; s != NULL; s = s->base.next) {
6033 assert(s->kind == STATEMENT_ASM);
6035 char const *const text = s->asms.asm_text.begin;
6036 size_t const size = s->asms.asm_text.size;
6037 ident *const id = new_id_from_chars(text, size);
6042 static const char *get_cwd(void)
6044 static char buf[1024];
6045 if (buf[0] == '\0') {
6046 return getcwd(buf, sizeof(buf));
6051 void translation_unit_to_firm(translation_unit_t *unit)
6053 if (c_mode & _CXX) {
6054 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6055 } else if (c_mode & _C99) {
6056 be_dwarf_set_source_language(DW_LANG_C99);
6057 } else if (c_mode & _C89) {
6058 be_dwarf_set_source_language(DW_LANG_C89);
6060 be_dwarf_set_source_language(DW_LANG_C);
6062 const char *cwd = get_cwd();
6064 be_dwarf_set_compilation_directory(cwd);
6067 /* initialize firm arithmetic */
6068 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6069 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6071 /* just to be sure */
6072 init_jump_target(&break_target, NULL);
6073 init_jump_target(&continue_target, NULL);
6074 current_switch = NULL;
6075 current_translation_unit = unit;
6079 scope_to_firm(&unit->scope);
6080 global_asm_to_firm(unit->global_asm);
6082 current_ir_graph = NULL;
6083 current_translation_unit = NULL;