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 fp_model_t firm_fp_model = fp_model_precise;
64 static const backend_params *be_params;
66 static ir_type *ir_type_char;
68 /* architecture specific floating point arithmetic mode (if any) */
69 static ir_mode *mode_float_arithmetic;
71 /* alignment of stack parameters */
72 static unsigned stack_param_align;
74 static int next_value_number_function;
75 static jump_target continue_target;
76 static jump_target break_target;
77 static ir_node *current_switch;
78 static bool saw_default_label;
79 static entity_t **inner_functions;
80 static jump_target ijmp_target;
81 static ir_node **ijmp_ops;
82 static ir_node **ijmp_blocks;
83 static bool constant_folding;
85 #define PUSH_BREAK(val) \
86 jump_target const old_break_target = break_target; \
87 (init_jump_target(&break_target, (val)))
89 ((void)(break_target = old_break_target))
91 #define PUSH_CONTINUE(val) \
92 jump_target const old_continue_target = continue_target; \
93 (init_jump_target(&continue_target, (val)))
94 #define POP_CONTINUE() \
95 ((void)(continue_target = old_continue_target))
97 #define PUSH_IRG(val) \
98 ir_graph *const old_irg = current_ir_graph; \
99 ir_graph *const new_irg = (val); \
100 ((void)(current_ir_graph = new_irg))
103 (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
105 static const entity_t *current_function_entity;
106 static ir_node *current_function_name;
107 static ir_node *current_funcsig;
108 static ir_graph *current_function;
109 static translation_unit_t *current_translation_unit;
110 static trampoline_region *current_trampolines;
111 static ir_type *current_outer_frame;
112 static ir_node *current_static_link;
113 static ir_entity *current_vararg_entity;
115 static entitymap_t entitymap;
117 static struct obstack asm_obst;
119 typedef enum declaration_kind_t {
120 DECLARATION_KIND_UNKNOWN,
121 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
122 DECLARATION_KIND_GLOBAL_VARIABLE,
123 DECLARATION_KIND_LOCAL_VARIABLE,
124 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
125 DECLARATION_KIND_PARAMETER,
126 DECLARATION_KIND_PARAMETER_ENTITY,
127 DECLARATION_KIND_FUNCTION,
128 DECLARATION_KIND_COMPOUND_MEMBER,
129 DECLARATION_KIND_INNER_FUNCTION
130 } declaration_kind_t;
132 static ir_type *get_ir_type_incomplete(type_t *type);
134 static void enqueue_inner_function(entity_t *entity)
136 if (inner_functions == NULL)
137 inner_functions = NEW_ARR_F(entity_t *, 0);
138 ARR_APP1(entity_t*, inner_functions, entity);
141 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
143 const entity_t *entity = get_irg_loc_description(irg, pos);
145 if (entity != NULL) {
146 position_t const *const pos = &entity->base.pos;
147 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
149 return new_r_Unknown(irg, mode);
152 static src_loc_t dbg_retrieve(const dbg_info *dbg)
154 position_t const *const pos = (position_t const*)dbg;
156 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
158 return (src_loc_t){ NULL, 0, 0 };
162 static dbg_info *get_dbg_info(const position_t *pos)
164 return (dbg_info*) pos;
167 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
168 const type_dbg_info *dbg)
171 print_to_buffer(buffer, buffer_size);
172 const type_t *type = (const type_t*) dbg;
174 finish_print_to_buffer();
177 static type_dbg_info *get_type_dbg_info_(const type_t *type)
179 return (type_dbg_info*) type;
182 /* is the current block a reachable one? */
183 static bool currently_reachable(void)
185 ir_node *const block = get_cur_block();
186 return block != NULL && !is_Bad(block);
189 static void set_unreachable_now(void)
194 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
196 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
197 static ir_node *expression_to_value(expression_t const *expr);
199 static unsigned decide_modulo_shift(unsigned type_size)
201 if (architecture_modulo_shift == 0)
203 if (type_size < architecture_modulo_shift)
204 return architecture_modulo_shift;
208 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
210 unsigned flags = get_atomic_type_flags(kind);
211 unsigned size = get_atomic_type_size(kind);
212 if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
214 case 4: return get_modeF();
215 case 8: return get_modeD();
216 default: panic("unexpected kind");
218 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
220 unsigned bit_size = size * 8;
221 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
222 unsigned modulo_shift = decide_modulo_shift(bit_size);
224 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
225 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
233 * Initialises the atomic modes depending on the machine size.
235 static void init_atomic_modes(void)
237 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
238 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
239 if (atomic_modes[i] != NULL)
241 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
245 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
247 assert(kind <= ATOMIC_TYPE_LAST);
248 return atomic_modes[kind];
251 static ir_node *get_vla_size(array_type_t *const type)
253 ir_node *size_node = type->size_node;
254 if (size_node == NULL) {
255 size_node = expression_to_value(type->size_expression);
256 type->size_node = size_node;
261 static unsigned count_parameters(const function_type_t *function_type)
265 function_parameter_t *parameter = function_type->parameters;
266 for ( ; parameter != NULL; parameter = parameter->next) {
273 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
276 ir_mode *mode = atomic_modes[akind];
277 ir_type *irtype = new_d_type_primitive(mode, dbgi);
278 unsigned alignment = get_atomic_type_alignment(akind);
279 unsigned size = get_atomic_type_size(akind);
281 set_type_size_bytes(irtype, size);
282 set_type_alignment_bytes(irtype, alignment);
288 * Creates a Firm type for an atomic type
290 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
292 type_dbg_info *dbgi = get_type_dbg_info_(type);
293 return create_primitive_irtype(akind, dbgi);
297 * Creates a Firm type for a complex type
299 static ir_type *create_complex_type(atomic_type_kind_t akind,
302 type_dbg_info *dbgi = get_type_dbg_info_(type);
303 ir_type *etype = create_primitive_irtype(akind, NULL);
304 ir_type *irtype = new_d_type_array(1, etype, dbgi);
306 int align = get_type_alignment_bytes(etype);
307 set_type_alignment_bytes(irtype, align);
308 unsigned n_elements = 2;
309 set_array_bounds_int(irtype, 0, 0, n_elements);
310 size_t elemsize = get_type_size_bytes(etype);
311 if (elemsize % align > 0) {
312 elemsize += align - (elemsize % align);
314 set_type_size_bytes(irtype, n_elements * elemsize);
320 * Creates a Firm type for an imaginary type
322 static ir_type *create_imaginary_type(const atomic_type_t *type)
324 return create_atomic_type(type->akind, (const type_t*)type);
328 * return type of a parameter (and take transparent union gnu extension into
331 static type_t *get_parameter_type(type_t *orig_type)
333 type_t *type = skip_typeref(orig_type);
334 if (is_type_union(type)
335 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
336 compound_t *compound = type->compound.compound;
337 type = compound->members.entities->declaration.type;
343 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
345 type_t *return_type = skip_typeref(function_type->return_type);
347 int n_parameters = count_parameters(function_type)
348 + (for_closure ? 1 : 0);
349 int n_results = is_type_void(return_type) ? 0 : 1;
350 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
351 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
353 if (!is_type_void(return_type)) {
354 ir_type *restype = get_ir_type(return_type);
355 set_method_res_type(irtype, 0, restype);
358 function_parameter_t *parameter = function_type->parameters;
361 ir_type *p_irtype = get_ir_type(type_void_ptr);
362 set_method_param_type(irtype, n, p_irtype);
365 for ( ; parameter != NULL; parameter = parameter->next) {
366 type_t *type = get_parameter_type(parameter->type);
367 ir_type *p_irtype = get_ir_type(type);
368 set_method_param_type(irtype, n, p_irtype);
372 bool is_variadic = function_type->variadic;
375 set_method_variadicity(irtype, variadicity_variadic);
377 unsigned cc = get_method_calling_convention(irtype);
378 switch (function_type->calling_convention) {
379 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
382 set_method_calling_convention(irtype, SET_CDECL(cc));
389 /* only non-variadic function can use stdcall, else use cdecl */
390 set_method_calling_convention(irtype, SET_STDCALL(cc));
396 /* only non-variadic function can use fastcall, else use cdecl */
397 set_method_calling_convention(irtype, SET_FASTCALL(cc));
401 /* Hmm, leave default, not accepted by the parser yet. */
406 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
408 const decl_modifiers_t modifiers = function_type->modifiers;
409 if (modifiers & DM_CONST)
410 add_method_additional_properties(irtype, mtp_property_const);
411 if (modifiers & DM_PURE)
412 add_method_additional_properties(irtype, mtp_property_pure);
413 if (modifiers & DM_RETURNS_TWICE)
414 add_method_additional_properties(irtype, mtp_property_returns_twice);
415 if (modifiers & DM_NORETURN)
416 add_method_additional_properties(irtype, mtp_property_noreturn);
417 if (modifiers & DM_NOTHROW)
418 add_method_additional_properties(irtype, mtp_property_nothrow);
419 if (modifiers & DM_MALLOC)
420 add_method_additional_properties(irtype, mtp_property_malloc);
425 static ir_type *create_pointer_type(pointer_type_t *type)
427 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
428 type_t *points_to = type->points_to;
429 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
430 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
435 static ir_type *create_reference_type(reference_type_t *type)
437 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
438 type_t *refers_to = type->refers_to;
439 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
440 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
445 static ir_type *create_array_type(array_type_t *type)
447 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
448 type_t *element_type = type->element_type;
449 ir_type *ir_element_type = get_ir_type(element_type);
450 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
452 const int align = get_type_alignment_bytes(ir_element_type);
453 set_type_alignment_bytes(irtype, align);
455 if (type->size_constant) {
456 int n_elements = type->size;
458 set_array_bounds_int(irtype, 0, 0, n_elements);
460 size_t elemsize = get_type_size_bytes(ir_element_type);
461 if (elemsize % align > 0) {
462 elemsize += align - (elemsize % align);
464 set_type_size_bytes(irtype, n_elements * elemsize);
466 set_array_lower_bound_int(irtype, 0, 0);
468 set_type_state(irtype, layout_fixed);
474 * Return the signed integer type of size bits.
476 * @param size the size
478 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
482 static ir_mode *s_modes[64 + 1] = {NULL, };
486 if (size <= 0 || size > 64)
489 mode = s_modes[size];
493 snprintf(name, sizeof(name), "bf_I%u", size);
494 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
495 s_modes[size] = mode;
498 type_dbg_info *dbgi = get_type_dbg_info_(type);
499 res = new_d_type_primitive(mode, dbgi);
500 set_primitive_base_type(res, base_tp);
506 * Return the unsigned integer type of size bits.
508 * @param size the size
510 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
514 static ir_mode *u_modes[64 + 1] = {NULL, };
518 if (size <= 0 || size > 64)
521 mode = u_modes[size];
525 snprintf(name, sizeof(name), "bf_U%u", size);
526 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
527 u_modes[size] = mode;
530 type_dbg_info *dbgi = get_type_dbg_info_(type);
531 res = new_d_type_primitive(mode, dbgi);
532 set_primitive_base_type(res, base_tp);
537 static ir_type *create_bitfield_type(const entity_t *entity)
539 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
540 type_t *base = skip_typeref(entity->declaration.type);
541 assert(is_type_integer(base));
542 ir_type *irbase = get_ir_type(base);
544 unsigned bit_size = entity->compound_member.bit_size;
546 if (is_type_signed(base)) {
547 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
549 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
554 * Construct firm type from ast struct type.
556 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
558 compound_t *compound = type->compound;
560 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
561 return compound->irtype;
564 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
566 symbol_t *type_symbol = compound->base.symbol;
568 if (type_symbol != NULL) {
569 id = new_id_from_str(type_symbol->string);
572 id = id_unique("__anonymous_union.%u");
574 id = id_unique("__anonymous_struct.%u");
580 irtype = new_type_union(id);
582 irtype = new_type_struct(id);
585 compound->irtype_complete = false;
586 compound->irtype = irtype;
592 layout_union_type(type);
594 layout_struct_type(type);
597 compound->irtype_complete = true;
599 entity_t *entry = compound->members.entities;
600 for ( ; entry != NULL; entry = entry->base.next) {
601 if (entry->kind != ENTITY_COMPOUND_MEMBER)
604 symbol_t *symbol = entry->base.symbol;
605 type_t *entry_type = entry->declaration.type;
607 if (symbol == NULL) {
608 /* anonymous bitfield member, skip */
609 if (entry->compound_member.bitfield)
611 assert(is_type_compound(entry_type));
612 ident = id_unique("anon.%u");
614 ident = new_id_from_str(symbol->string);
617 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
619 ir_type *entry_irtype;
620 if (entry->compound_member.bitfield) {
621 entry_irtype = create_bitfield_type(entry);
623 entry_irtype = get_ir_type(entry_type);
625 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
627 set_entity_offset(entity, entry->compound_member.offset);
628 set_entity_offset_bits_remainder(entity,
629 entry->compound_member.bit_offset);
631 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
632 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
633 entry->compound_member.entity = entity;
636 set_type_alignment_bytes(irtype, compound->alignment);
637 set_type_size_bytes(irtype, compound->size);
638 set_type_state(irtype, layout_fixed);
643 void determine_enum_values(enum_type_t *const type)
645 ir_mode *const mode = atomic_modes[type->base.akind];
646 ir_tarval *const one = get_mode_one(mode);
647 ir_tarval * tv_next = get_mode_null(mode);
649 enum_t *enume = type->enume;
650 entity_t *entry = enume->base.next;
651 for (; entry != NULL; entry = entry->base.next) {
652 if (entry->kind != ENTITY_ENUM_VALUE)
655 expression_t *const init = entry->enum_value.value;
657 tv_next = fold_constant_to_tarval(init);
659 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
660 entry->enum_value.tv = tv_next;
661 tv_next = tarval_add(tv_next, one);
665 static ir_type *create_enum_type(enum_type_t *const type)
667 return create_atomic_type(type->base.akind, (const type_t*) type);
670 static ir_type *get_ir_type_incomplete(type_t *type)
672 type = skip_typeref(type);
674 if (type->base.firm_type != NULL) {
675 return type->base.firm_type;
678 if (is_type_compound(type)) {
679 return create_compound_type(&type->compound, true);
681 return get_ir_type(type);
685 ir_type *get_ir_type(type_t *type)
687 type = skip_typeref(type);
689 if (type->base.firm_type != NULL) {
690 return type->base.firm_type;
693 ir_type *firm_type = NULL;
694 switch (type->kind) {
696 firm_type = create_atomic_type(type->atomic.akind, type);
699 firm_type = create_complex_type(type->atomic.akind, type);
702 firm_type = create_imaginary_type(&type->atomic);
705 firm_type = create_method_type(&type->function, false);
708 firm_type = create_pointer_type(&type->pointer);
711 firm_type = create_reference_type(&type->reference);
714 firm_type = create_array_type(&type->array);
716 case TYPE_COMPOUND_STRUCT:
717 case TYPE_COMPOUND_UNION:
718 firm_type = create_compound_type(&type->compound, false);
721 firm_type = create_enum_type(&type->enumt);
729 if (firm_type == NULL)
730 panic("unknown type found");
732 type->base.firm_type = firm_type;
736 static ir_mode *get_ir_mode_storage(type_t *type)
738 type = skip_typeref(type);
740 /* Firm doesn't report a mode for arrays and structs/unions. */
741 if (!is_type_scalar(type)) {
745 ir_type *const irtype = get_ir_type(type);
746 ir_mode *const mode = get_type_mode(irtype);
747 assert(mode != NULL);
752 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
753 * int that it returns bigger modes for floating point on some platforms
754 * (x87 internally does arithemtic with 80bits)
756 static ir_mode *get_ir_mode_arithmetic(type_t *type)
758 ir_mode *mode = get_ir_mode_storage(type);
759 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
760 return mode_float_arithmetic;
767 * Return a node representing the size of a type.
769 static ir_node *get_type_size_node(type_t *type)
771 ir_mode *const mode = get_ir_mode_storage(type_size_t);
772 type = skip_typeref(type);
774 if (is_type_array(type) && type->array.is_vla) {
775 ir_node *size_node = get_vla_size(&type->array);
776 ir_node *elem_size = get_type_size_node(type->array.element_type);
777 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
781 unsigned const size = get_type_size(type);
782 return new_Const_long(mode, size);
785 /** Names of the runtime functions. */
786 static const struct {
787 int id; /**< the rts id */
788 int n_res; /**< number of return values */
789 const char *name; /**< the name of the rts function */
790 int n_params; /**< number of parameters */
791 unsigned flags; /**< language flags */
793 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
794 { rts_abort, 0, "abort", 0, _C89 },
795 { rts_alloca, 1, "alloca", 1, _ALL },
796 { rts_abs, 1, "abs", 1, _C89 },
797 { rts_labs, 1, "labs", 1, _C89 },
798 { rts_llabs, 1, "llabs", 1, _C99 },
799 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
801 { rts_fabs, 1, "fabs", 1, _C89 },
802 { rts_sqrt, 1, "sqrt", 1, _C89 },
803 { rts_cbrt, 1, "cbrt", 1, _C99 },
804 { rts_exp, 1, "exp", 1, _C89 },
805 { rts_exp2, 1, "exp2", 1, _C89 },
806 { rts_exp10, 1, "exp10", 1, _GNUC },
807 { rts_log, 1, "log", 1, _C89 },
808 { rts_log2, 1, "log2", 1, _C89 },
809 { rts_log10, 1, "log10", 1, _C89 },
810 { rts_pow, 1, "pow", 2, _C89 },
811 { rts_sin, 1, "sin", 1, _C89 },
812 { rts_cos, 1, "cos", 1, _C89 },
813 { rts_tan, 1, "tan", 1, _C89 },
814 { rts_asin, 1, "asin", 1, _C89 },
815 { rts_acos, 1, "acos", 1, _C89 },
816 { rts_atan, 1, "atan", 1, _C89 },
817 { rts_sinh, 1, "sinh", 1, _C89 },
818 { rts_cosh, 1, "cosh", 1, _C89 },
819 { rts_tanh, 1, "tanh", 1, _C89 },
821 { rts_fabsf, 1, "fabsf", 1, _C99 },
822 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
823 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
824 { rts_expf, 1, "expf", 1, _C99 },
825 { rts_exp2f, 1, "exp2f", 1, _C99 },
826 { rts_exp10f, 1, "exp10f", 1, _GNUC },
827 { rts_logf, 1, "logf", 1, _C99 },
828 { rts_log2f, 1, "log2f", 1, _C99 },
829 { rts_log10f, 1, "log10f", 1, _C99 },
830 { rts_powf, 1, "powf", 2, _C99 },
831 { rts_sinf, 1, "sinf", 1, _C99 },
832 { rts_cosf, 1, "cosf", 1, _C99 },
833 { rts_tanf, 1, "tanf", 1, _C99 },
834 { rts_asinf, 1, "asinf", 1, _C99 },
835 { rts_acosf, 1, "acosf", 1, _C99 },
836 { rts_atanf, 1, "atanf", 1, _C99 },
837 { rts_sinhf, 1, "sinhf", 1, _C99 },
838 { rts_coshf, 1, "coshf", 1, _C99 },
839 { rts_tanhf, 1, "tanhf", 1, _C99 },
841 { rts_fabsl, 1, "fabsl", 1, _C99 },
842 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
843 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
844 { rts_expl, 1, "expl", 1, _C99 },
845 { rts_exp2l, 1, "exp2l", 1, _C99 },
846 { rts_exp10l, 1, "exp10l", 1, _GNUC },
847 { rts_logl, 1, "logl", 1, _C99 },
848 { rts_log2l, 1, "log2l", 1, _C99 },
849 { rts_log10l, 1, "log10l", 1, _C99 },
850 { rts_powl, 1, "powl", 2, _C99 },
851 { rts_sinl, 1, "sinl", 1, _C99 },
852 { rts_cosl, 1, "cosl", 1, _C99 },
853 { rts_tanl, 1, "tanl", 1, _C99 },
854 { rts_asinl, 1, "asinl", 1, _C99 },
855 { rts_acosl, 1, "acosl", 1, _C99 },
856 { rts_atanl, 1, "atanl", 1, _C99 },
857 { rts_sinhl, 1, "sinhl", 1, _C99 },
858 { rts_coshl, 1, "coshl", 1, _C99 },
859 { rts_tanhl, 1, "tanhl", 1, _C99 },
861 { rts_strcmp, 1, "strcmp", 2, _C89 },
862 { rts_strncmp, 1, "strncmp", 3, _C89 },
863 { rts_strcpy, 1, "strcpy", 2, _C89 },
864 { rts_strlen, 1, "strlen", 1, _C89 },
865 { rts_memcpy, 1, "memcpy", 3, _C89 },
866 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
867 { rts_memmove, 1, "memmove", 3, _C89 },
868 { rts_memset, 1, "memset", 3, _C89 },
869 { rts_memcmp, 1, "memcmp", 3, _C89 },
872 static ident *rts_idents[lengthof(rts_data)];
874 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
876 void set_create_ld_ident(ident *(*func)(entity_t*))
878 create_ld_ident = func;
881 static bool declaration_is_definition(const entity_t *entity)
883 switch (entity->kind) {
884 case ENTITY_VARIABLE:
885 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
886 case ENTITY_FUNCTION:
887 return entity->function.body != NULL;
888 case ENTITY_PARAMETER:
889 case ENTITY_COMPOUND_MEMBER:
893 case ENTITY_ENUM_VALUE:
894 case ENTITY_NAMESPACE:
896 case ENTITY_LOCAL_LABEL:
899 panic("entity is not a declaration");
903 * Handle GNU attributes for entities
905 * @param ent the entity
906 * @param decl the routine declaration
908 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
910 assert(is_declaration(entity));
911 decl_modifiers_t modifiers = entity->declaration.modifiers;
913 if (is_method_entity(irentity)) {
914 if (modifiers & DM_PURE)
915 add_entity_additional_properties(irentity, mtp_property_pure);
916 if (modifiers & DM_CONST)
917 add_entity_additional_properties(irentity, mtp_property_const);
918 if (modifiers & DM_NOINLINE)
919 add_entity_additional_properties(irentity, mtp_property_noinline);
920 if (modifiers & DM_FORCEINLINE)
921 add_entity_additional_properties(irentity, mtp_property_always_inline);
922 if (modifiers & DM_NAKED)
923 add_entity_additional_properties(irentity, mtp_property_naked);
924 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
925 add_entity_additional_properties(irentity,
926 mtp_property_inline_recommended);
928 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
929 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
931 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
932 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
933 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
937 static bool is_main(entity_t *entity)
939 static symbol_t *sym_main = NULL;
940 if (sym_main == NULL) {
941 sym_main = symbol_table_insert("main");
944 if (entity->base.symbol != sym_main)
946 /* must be in outermost scope */
947 if (entity->base.parent_scope != ¤t_translation_unit->scope)
954 * Creates an entity representing a function.
956 * @param entity the function declaration/definition
957 * @param owner_type the owner type of this function, NULL
958 * for global functions
960 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
962 assert(entity->kind == ENTITY_FUNCTION);
963 if (entity->function.irentity != NULL)
964 return entity->function.irentity;
966 switch (entity->function.btk) {
969 case BUILTIN_LIBC_CHECK:
975 symbol_t *symbol = entity->base.symbol;
976 ident *id = new_id_from_str(symbol->string);
978 /* already an entity defined? */
979 ir_entity *irentity = entitymap_get(&entitymap, symbol);
980 bool const has_body = entity->function.body != NULL;
981 if (irentity != NULL) {
985 ir_type *ir_type_method;
986 if (entity->function.need_closure)
987 ir_type_method = create_method_type(&entity->declaration.type->function, true);
989 ir_type_method = get_ir_type(entity->declaration.type);
991 bool nested_function = false;
992 if (owner_type == NULL)
993 owner_type = get_glob_type();
995 nested_function = true;
997 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
998 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1001 if (nested_function)
1002 ld_id = id_unique("inner.%u");
1004 ld_id = create_ld_ident(entity);
1005 set_entity_ld_ident(irentity, ld_id);
1007 handle_decl_modifiers(irentity, entity);
1009 if (! nested_function) {
1010 storage_class_tag_t const storage_class
1011 = (storage_class_tag_t) entity->declaration.storage_class;
1012 if (storage_class == STORAGE_CLASS_STATIC) {
1013 set_entity_visibility(irentity, ir_visibility_local);
1015 set_entity_visibility(irentity, ir_visibility_external);
1018 bool const is_inline = entity->function.is_inline;
1019 if (is_inline && has_body) {
1020 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1021 || ((c_mode & _C99) == 0
1022 && storage_class == STORAGE_CLASS_EXTERN)) {
1023 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1027 /* nested functions are always local */
1028 set_entity_visibility(irentity, ir_visibility_local);
1031 /* We should check for file scope here, but as long as we compile C only
1032 this is not needed. */
1033 if (!freestanding && !has_body) {
1034 /* check for a known runtime function */
1035 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1036 if (id != rts_idents[i])
1039 function_type_t *function_type
1040 = &entity->declaration.type->function;
1041 /* rts_entities code can't handle a "wrong" number of parameters */
1042 if (function_type->unspecified_parameters)
1045 /* check number of parameters */
1046 int n_params = count_parameters(function_type);
1047 if (n_params != rts_data[i].n_params)
1050 type_t *return_type = skip_typeref(function_type->return_type);
1051 int n_res = is_type_void(return_type) ? 0 : 1;
1052 if (n_res != rts_data[i].n_res)
1055 /* ignore those rts functions not necessary needed for current mode */
1056 if ((c_mode & rts_data[i].flags) == 0)
1058 assert(rts_entities[rts_data[i].id] == NULL);
1059 rts_entities[rts_data[i].id] = irentity;
1063 entitymap_insert(&entitymap, symbol, irentity);
1066 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1067 entity->function.irentity = irentity;
1073 * Creates a SymConst for a given entity.
1075 * @param dbgi debug info
1076 * @param entity the entity
1078 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1080 assert(entity != NULL);
1081 union symconst_symbol sym;
1082 sym.entity_p = entity;
1083 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1086 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1088 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1091 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1093 ir_mode *value_mode = get_irn_mode(value);
1095 if (value_mode == dest_mode)
1098 return new_d_Conv(dbgi, value, dest_mode);
1101 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1103 ir_mode *const mode = get_ir_mode_storage(type);
1104 return create_conv(dbgi, val, mode);
1108 * Creates a SymConst node representing a string constant.
1110 * @param src_pos the source position of the string constant
1111 * @param id_prefix a prefix for the name of the generated string constant
1112 * @param value the value of the string constant
1114 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1116 size_t const slen = get_string_len(value) + 1;
1117 ir_initializer_t *const initializer = create_initializer_compound(slen);
1118 ir_type * elem_type;
1119 switch (value->encoding) {
1120 case STRING_ENCODING_CHAR:
1121 case STRING_ENCODING_UTF8: {
1122 elem_type = ir_type_char;
1124 ir_mode *const mode = get_type_mode(elem_type);
1125 char const *p = value->begin;
1126 for (size_t i = 0; i < slen; ++i) {
1127 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1128 ir_initializer_t *val = create_initializer_tarval(tv);
1129 set_initializer_compound_value(initializer, i, val);
1136 case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1137 case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1138 case STRING_ENCODING_WIDE: type = type_wchar_t; goto init_wide;
1140 elem_type = get_ir_type(type);
1142 ir_mode *const mode = get_type_mode(elem_type);
1143 char const *p = value->begin;
1144 for (size_t i = 0; i < slen; ++i) {
1145 assert(p <= value->begin + value->size);
1146 utf32 v = read_utf8_char(&p);
1147 ir_tarval *tv = new_tarval_from_long(v, mode);
1148 ir_initializer_t *val = create_initializer_tarval(tv);
1149 set_initializer_compound_value(initializer, i, val);
1154 panic("invalid string encoding");
1157 ir_type *const type = new_type_array(1, elem_type);
1158 set_array_bounds_int(type, 0, 0, slen);
1159 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1160 set_type_state( type, layout_fixed);
1162 ir_type *const global_type = get_glob_type();
1163 ident *const id = id_unique(id_prefix);
1164 dbg_info *const dbgi = get_dbg_info(src_pos);
1165 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1166 set_entity_ld_ident( entity, id);
1167 set_entity_visibility( entity, ir_visibility_private);
1168 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1169 set_entity_initializer(entity, initializer);
1171 return create_symconst(dbgi, entity);
1174 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1176 assert(type->kind == TYPE_ATOMIC);
1177 atomic_type_kind_t akind = type->atomic.akind;
1179 ir_mode *const mode = atomic_modes[akind];
1180 char const *const str = literal->value.begin;
1181 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1182 if (tv == tarval_bad)
1185 literal->base.type = type;
1186 literal->target_value = tv;
1190 void determine_literal_type(literal_expression_t *const literal)
1192 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1194 /* -1: signed only, 0: any, 1: unsigned only */
1196 !is_type_signed(literal->base.type) ? 1 :
1197 literal->value.begin[0] == '0' ? 0 :
1198 -1; /* Decimal literals only try signed types. */
1200 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1201 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1203 if (try_create_integer(literal, literal->base.type))
1206 /* now try if the constant is small enough for some types */
1207 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1209 if (sign <= 0 && try_create_integer(literal, type_long))
1211 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1213 /* last try? then we should not report tarval_bad */
1215 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1216 if (sign <= 0 && try_create_integer(literal, type_long_long))
1221 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1222 bool res = try_create_integer(literal, type_unsigned_long_long);
1224 panic("internal error when parsing number literal");
1227 tarval_set_integer_overflow_mode(old_mode);
1231 * Creates a Const node representing a constant.
1233 static ir_node *literal_to_firm(const literal_expression_t *literal)
1235 type_t *type = skip_typeref(literal->base.type);
1236 ir_mode *mode = get_ir_mode_storage(type);
1237 const char *string = literal->value.begin;
1238 size_t size = literal->value.size;
1241 switch (literal->base.kind) {
1242 case EXPR_LITERAL_INTEGER:
1243 assert(literal->target_value != NULL);
1244 tv = literal->target_value;
1247 case EXPR_LITERAL_FLOATINGPOINT:
1248 tv = new_tarval_from_str(string, size, mode);
1251 case EXPR_LITERAL_BOOLEAN:
1252 if (string[0] == 't') {
1253 tv = get_mode_one(mode);
1255 assert(string[0] == 'f');
1256 case EXPR_LITERAL_MS_NOOP:
1257 tv = get_mode_null(mode);
1262 panic("invalid literal kind");
1265 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1266 return new_d_Const(dbgi, tv);
1270 * Creates a Const node representing a character constant.
1272 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1274 type_t *type = skip_typeref(literal->base.type);
1275 ir_mode *mode = get_ir_mode_storage(type);
1276 const char *string = literal->value.begin;
1277 size_t size = literal->value.size;
1280 switch (literal->value.encoding) {
1281 case STRING_ENCODING_WIDE: {
1282 utf32 v = read_utf8_char(&string);
1284 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1286 tv = new_tarval_from_str(buf, len, mode);
1290 case STRING_ENCODING_CHAR: {
1293 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1294 if (size == 1 && char_is_signed) {
1295 v = (signed char)string[0];
1298 for (size_t i = 0; i < size; ++i) {
1299 v = (v << 8) | ((unsigned char)string[i]);
1303 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1305 tv = new_tarval_from_str(buf, len, mode);
1310 panic("invalid literal kind");
1313 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1314 return new_d_Const(dbgi, tv);
1318 * Allocate an area of size bytes aligned at alignment
1321 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1323 static unsigned area_cnt = 0;
1326 ir_type *tp = new_type_array(1, ir_type_char);
1327 set_array_bounds_int(tp, 0, 0, size);
1328 set_type_alignment_bytes(tp, alignment);
1330 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1331 ident *name = new_id_from_str(buf);
1332 ir_entity *area = new_entity(frame_type, name, tp);
1334 /* mark this entity as compiler generated */
1335 set_entity_compiler_generated(area, 1);
1340 * Return a node representing a trampoline region
1341 * for a given function entity.
1343 * @param dbgi debug info
1344 * @param entity the function entity
1346 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1348 ir_entity *region = NULL;
1351 if (current_trampolines != NULL) {
1352 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1353 if (current_trampolines[i].function == entity) {
1354 region = current_trampolines[i].region;
1359 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1361 ir_graph *irg = current_ir_graph;
1362 if (region == NULL) {
1363 /* create a new region */
1364 ir_type *frame_tp = get_irg_frame_type(irg);
1365 trampoline_region reg;
1366 reg.function = entity;
1368 reg.region = alloc_trampoline(frame_tp,
1369 be_params->trampoline_size,
1370 be_params->trampoline_align);
1371 ARR_APP1(trampoline_region, current_trampolines, reg);
1372 region = reg.region;
1374 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1379 * Creates a trampoline for a function represented by an entity.
1381 * @param dbgi debug info
1382 * @param mode the (reference) mode for the function address
1383 * @param entity the function entity
1385 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1388 assert(entity != NULL);
1390 in[0] = get_trampoline_region(dbgi, entity);
1391 in[1] = create_symconst(dbgi, entity);
1392 in[2] = get_irg_frame(current_ir_graph);
1394 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1395 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1396 return new_Proj(irn, mode, pn_Builtin_max+1);
1400 * Dereference an address.
1402 * @param dbgi debug info
1403 * @param type the type of the dereferenced result (the points_to type)
1404 * @param addr the address to dereference
1406 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1407 ir_node *const addr)
1409 type_t *skipped = skip_typeref(type);
1410 if (is_type_incomplete(skipped))
1413 ir_type *irtype = get_ir_type(skipped);
1414 if (is_compound_type(irtype)
1415 || is_Method_type(irtype)
1416 || is_Array_type(irtype)) {
1420 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1421 ? cons_volatile : cons_none;
1422 ir_mode *const mode = get_type_mode(irtype);
1423 ir_node *const memory = get_store();
1424 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1425 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1426 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1428 set_store(load_mem);
1433 * Returns the correct base address depending on whether it is a parameter or a
1434 * normal local variable.
1436 static ir_node *get_local_frame(ir_entity *const ent)
1438 ir_graph *const irg = current_ir_graph;
1439 const ir_type *const owner = get_entity_owner(ent);
1440 if (owner == current_outer_frame) {
1441 assert(current_static_link != NULL);
1442 return current_static_link;
1444 return get_irg_frame(irg);
1449 * Keep the current block and memory.
1450 * This is necessary for all loops, because they could become infinite.
1452 static void keep_loop(void)
1454 keep_alive(get_cur_block());
1455 keep_alive(get_store());
1458 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1460 entity_t *entity = ref->entity;
1461 if (entity->enum_value.tv == NULL) {
1462 type_t *type = skip_typeref(entity->enum_value.enum_type);
1463 assert(type->kind == TYPE_ENUM);
1464 determine_enum_values(&type->enumt);
1467 return new_Const(entity->enum_value.tv);
1470 static ir_node *reference_addr(const reference_expression_t *ref)
1472 dbg_info *dbgi = get_dbg_info(&ref->base.pos);
1473 entity_t *entity = ref->entity;
1474 assert(is_declaration(entity));
1476 if (entity->kind == ENTITY_FUNCTION
1477 && entity->function.btk != BUILTIN_NONE) {
1478 ir_entity *irentity = get_function_entity(entity, NULL);
1479 /* for gcc compatibility we have to produce (dummy) addresses for some
1480 * builtins which don't have entities */
1481 if (irentity == NULL) {
1482 position_t const *const pos = &ref->base.pos;
1483 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1485 /* simply create a NULL pointer */
1486 ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1487 return new_Const(get_mode_null(mode));
1491 switch ((declaration_kind_t) entity->declaration.kind) {
1492 case DECLARATION_KIND_UNKNOWN:
1494 case DECLARATION_KIND_PARAMETER:
1495 case DECLARATION_KIND_LOCAL_VARIABLE:
1496 /* you can store to a local variable (so we don't panic but return NULL
1497 * as an indicator for no real address) */
1499 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1500 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1504 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1505 case DECLARATION_KIND_PARAMETER_ENTITY: {
1506 ir_entity *irentity = entity->variable.v.entity;
1507 ir_node *frame = get_local_frame(irentity);
1508 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1512 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1513 return entity->variable.v.vla_base;
1515 case DECLARATION_KIND_FUNCTION: {
1516 return create_symconst(dbgi, entity->function.irentity);
1519 case DECLARATION_KIND_INNER_FUNCTION: {
1520 type_t *const type = skip_typeref(entity->declaration.type);
1521 ir_mode *const mode = get_ir_mode_storage(type);
1522 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1523 /* inner function not using the closure */
1524 return create_symconst(dbgi, entity->function.irentity);
1526 /* need trampoline here */
1527 return create_trampoline(dbgi, mode, entity->function.irentity);
1531 case DECLARATION_KIND_COMPOUND_MEMBER:
1532 panic("not implemented reference type");
1535 panic("reference to declaration with unknown type");
1538 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1540 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
1541 entity_t *const entity = ref->entity;
1542 assert(is_declaration(entity));
1544 switch ((declaration_kind_t)entity->declaration.kind) {
1545 case DECLARATION_KIND_LOCAL_VARIABLE:
1546 case DECLARATION_KIND_PARAMETER: {
1547 type_t *const type = skip_typeref(entity->declaration.type);
1548 ir_mode *const mode = get_ir_mode_storage(type);
1549 return get_value(entity->variable.v.value_number, mode);
1553 ir_node *const addr = reference_addr(ref);
1554 return deref_address(dbgi, entity->declaration.type, addr);
1560 * Transform calls to builtin functions.
1562 static ir_node *process_builtin_call(const call_expression_t *call)
1564 dbg_info *dbgi = get_dbg_info(&call->base.pos);
1566 assert(call->function->kind == EXPR_REFERENCE);
1567 reference_expression_t *builtin = &call->function->reference;
1569 type_t *expr_type = skip_typeref(builtin->base.type);
1570 assert(is_type_pointer(expr_type));
1572 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1574 switch (builtin->entity->function.btk) {
1577 case BUILTIN_ALLOCA: {
1578 expression_t *argument = call->arguments->expression;
1579 ir_node *size = expression_to_value(argument);
1581 ir_node *store = get_store();
1582 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1584 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1586 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1591 type_t *type = function_type->function.return_type;
1592 ir_mode *mode = get_ir_mode_storage(type);
1593 ir_tarval *tv = get_mode_infinite(mode);
1594 ir_node *res = new_d_Const(dbgi, tv);
1598 /* Ignore string for now... */
1599 assert(is_type_function(function_type));
1600 type_t *type = function_type->function.return_type;
1601 ir_mode *mode = get_ir_mode_storage(type);
1602 ir_tarval *tv = get_mode_NAN(mode);
1603 ir_node *res = new_d_Const(dbgi, tv);
1606 case BUILTIN_EXPECT: {
1607 expression_t *argument = call->arguments->expression;
1608 return expression_to_value(argument);
1610 case BUILTIN_VA_END:
1611 /* evaluate the argument of va_end for its side effects */
1612 expression_to_value(call->arguments->expression);
1614 case BUILTIN_OBJECT_SIZE: {
1615 /* determine value of "type" */
1616 expression_t *type_expression = call->arguments->next->expression;
1617 long type_val = fold_constant_to_int(type_expression);
1618 type_t *type = function_type->function.return_type;
1619 ir_mode *mode = get_ir_mode_storage(type);
1620 /* just produce a "I don't know" result */
1621 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1622 get_mode_minus_one(mode);
1624 return new_d_Const(dbgi, result);
1626 case BUILTIN_ROTL: {
1627 ir_node *val = expression_to_value(call->arguments->expression);
1628 ir_node *shf = expression_to_value(call->arguments->next->expression);
1629 ir_mode *mode = get_irn_mode(val);
1630 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1631 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1633 case BUILTIN_ROTR: {
1634 ir_node *val = expression_to_value(call->arguments->expression);
1635 ir_node *shf = expression_to_value(call->arguments->next->expression);
1636 ir_mode *mode = get_irn_mode(val);
1637 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1638 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1639 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1640 return new_d_Rotl(dbgi, val, sub, mode);
1645 case BUILTIN_LIBC_CHECK:
1646 panic("builtin did not produce an entity");
1648 panic("invalid builtin");
1652 * Transform a call expression.
1653 * Handles some special cases, like alloca() calls, which must be resolved
1654 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1655 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1658 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1660 dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1661 assert(currently_reachable());
1663 expression_t *function = call->function;
1664 ir_node *callee = NULL;
1665 bool firm_builtin = false;
1666 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1667 if (function->kind == EXPR_REFERENCE) {
1668 const reference_expression_t *ref = &function->reference;
1669 entity_t *entity = ref->entity;
1671 if (entity->kind == ENTITY_FUNCTION) {
1672 builtin_kind_t builtin = entity->function.btk;
1673 if (builtin == BUILTIN_FIRM) {
1674 firm_builtin = true;
1675 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1676 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1677 && builtin != BUILTIN_LIBC_CHECK) {
1678 return process_builtin_call(call);
1683 callee = expression_to_value(function);
1685 type_t *type = skip_typeref(function->base.type);
1686 assert(is_type_pointer(type));
1687 pointer_type_t *pointer_type = &type->pointer;
1688 type_t *points_to = skip_typeref(pointer_type->points_to);
1689 assert(is_type_function(points_to));
1690 function_type_t *function_type = &points_to->function;
1692 int n_parameters = 0;
1693 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1694 ir_type *new_method_type = NULL;
1695 if (function_type->variadic || function_type->unspecified_parameters) {
1696 const call_argument_t *argument = call->arguments;
1697 for ( ; argument != NULL; argument = argument->next) {
1701 /* we need to construct a new method type matching the call
1703 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1704 int n_res = get_method_n_ress(ir_method_type);
1705 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1706 set_method_calling_convention(new_method_type,
1707 get_method_calling_convention(ir_method_type));
1708 set_method_additional_properties(new_method_type,
1709 get_method_additional_properties(ir_method_type));
1710 set_method_variadicity(new_method_type,
1711 get_method_variadicity(ir_method_type));
1713 for (int i = 0; i < n_res; ++i) {
1714 set_method_res_type(new_method_type, i,
1715 get_method_res_type(ir_method_type, i));
1717 argument = call->arguments;
1718 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1719 expression_t *expression = argument->expression;
1720 ir_type *irtype = get_ir_type(expression->base.type);
1721 set_method_param_type(new_method_type, i, irtype);
1723 ir_method_type = new_method_type;
1725 n_parameters = get_method_n_params(ir_method_type);
1728 ir_node *in[n_parameters];
1730 const call_argument_t *argument = call->arguments;
1731 for (int n = 0; n < n_parameters; ++n) {
1732 expression_t *expression = argument->expression;
1733 ir_node *arg_node = expression_to_value(expression);
1734 type_t *arg_type = skip_typeref(expression->base.type);
1735 in[n] = conv_to_storage_type(dbgi, arg_node, arg_type);
1737 argument = argument->next;
1741 if (function_type->modifiers & DM_CONST) {
1742 store = get_irg_no_mem(current_ir_graph);
1744 store = get_store();
1748 type_t *return_type = skip_typeref(function_type->return_type);
1749 ir_node *result = NULL;
1751 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1753 if (! (function_type->modifiers & DM_CONST)) {
1754 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1758 if (!is_type_void(return_type)) {
1759 assert(is_type_scalar(return_type));
1760 ir_mode *mode = get_ir_mode_storage(return_type);
1761 result = new_Proj(node, mode, pn_Builtin_max+1);
1764 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1765 if (! (function_type->modifiers & DM_CONST)) {
1766 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1770 if (!is_type_void(return_type)) {
1771 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1772 ir_mode *const mode = get_ir_mode_storage(return_type);
1773 result = new_Proj(resproj, mode, 0);
1777 if (function_type->modifiers & DM_NORETURN) {
1778 /* A dead end: Keep the Call and the Block. Also place all further
1779 * nodes into a new and unreachable block. */
1781 keep_alive(get_cur_block());
1782 ir_node *block = new_Block(0, NULL);
1783 set_cur_block(block);
1789 static ir_node *statement_to_firm(statement_t *statement);
1790 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1791 static ir_node *expression_to_addr(const expression_t *expression);
1793 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1796 value = conv_to_storage_type(dbgi, value, type);
1798 ir_node *memory = get_store();
1800 if (is_type_scalar(type)) {
1801 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1802 ? cons_volatile : cons_none;
1803 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1804 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1805 set_store(store_mem);
1807 ir_type *irtype = get_ir_type(type);
1808 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1809 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1810 set_store(copyb_mem);
1814 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1816 ir_tarval *all_one = get_mode_all_one(mode);
1817 int mode_size = get_mode_size_bits(mode);
1818 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1820 assert(offset >= 0);
1822 assert(offset + size <= mode_size);
1823 if (size == mode_size) {
1827 long shiftr = get_mode_size_bits(mode) - size;
1828 long shiftl = offset;
1829 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1830 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1831 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1832 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1837 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1838 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1841 ir_type *entity_type = get_entity_type(entity);
1842 ir_type *base_type = get_primitive_base_type(entity_type);
1843 ir_mode *mode = get_type_mode(base_type);
1844 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1846 value = create_conv(dbgi, value, mode);
1848 /* kill upper bits of value and shift to right position */
1849 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1850 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1851 unsigned base_bits = get_mode_size_bits(mode);
1852 unsigned shiftwidth = base_bits - bitsize;
1854 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1855 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1857 unsigned shrwidth = base_bits - bitsize - bitoffset;
1858 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1859 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1861 /* load current value */
1862 ir_node *mem = get_store();
1863 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1864 set_volatile ? cons_volatile : cons_none);
1865 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1866 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1867 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1868 ir_tarval *inv_mask = tarval_not(shift_mask);
1869 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1870 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1872 /* construct new value and store */
1873 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1874 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1875 set_volatile ? cons_volatile : cons_none);
1876 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1877 set_store(store_mem);
1883 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1884 if (mode_is_signed(mode)) {
1885 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1887 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1892 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1895 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1896 entity_t *entity = expression->compound_entry;
1897 type_t *base_type = entity->declaration.type;
1898 ir_mode *mode = get_ir_mode_storage(base_type);
1899 ir_node *mem = get_store();
1900 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1901 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1902 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1903 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1905 ir_mode *amode = mode;
1906 /* optimisation, since shifting in modes < machine_size is usually
1908 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1911 unsigned amode_size = get_mode_size_bits(amode);
1912 load_res = create_conv(dbgi, load_res, amode);
1914 set_store(load_mem);
1916 /* kill upper bits */
1917 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1918 unsigned bitoffset = entity->compound_member.bit_offset;
1919 unsigned bitsize = entity->compound_member.bit_size;
1920 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1921 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1922 ir_node *countl = new_d_Const(dbgi, tvl);
1923 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1925 unsigned shift_bitsr = bitoffset + shift_bitsl;
1926 assert(shift_bitsr <= amode_size);
1927 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1928 ir_node *countr = new_d_Const(dbgi, tvr);
1930 if (mode_is_signed(mode)) {
1931 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1933 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1936 return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1939 /* make sure the selected compound type is constructed */
1940 static void construct_select_compound(const select_expression_t *expression)
1942 type_t *type = skip_typeref(expression->compound->base.type);
1943 if (is_type_pointer(type)) {
1944 type = type->pointer.points_to;
1946 (void) get_ir_type(type);
1949 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1950 ir_node *value, ir_node *addr)
1952 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1953 type_t *type = skip_typeref(expression->base.type);
1954 value = conv_to_storage_type(dbgi, value, type);
1956 if (expression->kind == EXPR_REFERENCE) {
1957 const reference_expression_t *ref = &expression->reference;
1959 entity_t *entity = ref->entity;
1960 assert(is_declaration(entity));
1961 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1962 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1963 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1964 set_value(entity->variable.v.value_number, value);
1970 addr = expression_to_addr(expression);
1971 assert(addr != NULL);
1973 if (expression->kind == EXPR_SELECT) {
1974 const select_expression_t *select = &expression->select;
1976 construct_select_compound(select);
1978 entity_t *entity = select->compound_entry;
1979 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1980 if (entity->compound_member.bitfield) {
1981 ir_entity *irentity = entity->compound_member.entity;
1983 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1984 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1985 set_volatile, true);
1990 assign_value(dbgi, addr, type, value);
1994 static ir_node *get_value_from_lvalue(const expression_t *expression,
1997 if (expression->kind == EXPR_REFERENCE) {
1998 const reference_expression_t *ref = &expression->reference;
2000 entity_t *entity = ref->entity;
2001 assert(entity->kind == ENTITY_VARIABLE
2002 || entity->kind == ENTITY_PARAMETER);
2003 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2005 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2006 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2007 value_number = entity->variable.v.value_number;
2008 assert(addr == NULL);
2009 type_t *type = skip_typeref(expression->base.type);
2010 ir_mode *mode = get_ir_mode_storage(type);
2011 return get_value(value_number, mode);
2015 assert(addr != NULL);
2016 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2019 if (expression->kind == EXPR_SELECT &&
2020 expression->select.compound_entry->compound_member.bitfield) {
2021 construct_select_compound(&expression->select);
2022 value = bitfield_extract_to_firm(&expression->select, addr);
2024 value = deref_address(dbgi, expression->base.type, addr);
2030 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2032 type_t *const type = skip_typeref(expr->base.type);
2033 ir_mode *const mode = get_ir_mode_arithmetic(type);
2036 if (is_type_pointer(type)) {
2037 offset = get_type_size_node(type->pointer.points_to);
2039 assert(is_type_arithmetic(type));
2040 offset = new_Const(get_mode_one(mode));
2043 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2044 expression_t const *const value_expr = expr->value;
2045 ir_node *const addr = expression_to_addr(value_expr);
2046 ir_node *const value = get_value_from_lvalue(value_expr, addr);
2047 ir_node *const value_arith = create_conv(dbgi, value, mode);
2048 ir_node *const new_value = inc
2049 ? new_d_Add(dbgi, value_arith, offset, mode)
2050 : new_d_Sub(dbgi, value_arith, offset, mode);
2052 ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2053 return pre ? store_value : value;
2056 static bool is_local_variable(expression_t *expression)
2058 if (expression->kind != EXPR_REFERENCE)
2060 reference_expression_t *ref_expr = &expression->reference;
2061 entity_t *entity = ref_expr->entity;
2062 if (entity->kind != ENTITY_VARIABLE)
2064 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2065 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2068 static ir_relation get_relation(const expression_kind_t kind)
2071 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2072 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2073 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2074 case EXPR_BINARY_ISLESS:
2075 case EXPR_BINARY_LESS: return ir_relation_less;
2076 case EXPR_BINARY_ISLESSEQUAL:
2077 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2078 case EXPR_BINARY_ISGREATER:
2079 case EXPR_BINARY_GREATER: return ir_relation_greater;
2080 case EXPR_BINARY_ISGREATEREQUAL:
2081 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2082 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2087 panic("trying to get ir_relation from non-comparison binexpr type");
2091 * Handle the assume optimizer hint: check if a Confirm
2092 * node can be created.
2094 * @param dbi debug info
2095 * @param expr the IL assume expression
2097 * we support here only some simple cases:
2102 static ir_node *handle_assume_compare(dbg_info *dbi,
2103 const binary_expression_t *expression)
2105 expression_t *op1 = expression->left;
2106 expression_t *op2 = expression->right;
2107 entity_t *var2, *var = NULL;
2108 ir_node *res = NULL;
2109 ir_relation relation = get_relation(expression->base.kind);
2111 if (is_local_variable(op1) && is_local_variable(op2)) {
2112 var = op1->reference.entity;
2113 var2 = op2->reference.entity;
2115 type_t *const type = skip_typeref(var->declaration.type);
2116 ir_mode *const mode = get_ir_mode_storage(type);
2118 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2119 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2121 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2122 set_value(var2->variable.v.value_number, res);
2124 res = new_d_Confirm(dbi, irn1, irn2, relation);
2125 set_value(var->variable.v.value_number, res);
2130 expression_t *con = NULL;
2131 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2132 var = op1->reference.entity;
2134 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2135 relation = get_inversed_relation(relation);
2136 var = op2->reference.entity;
2141 type_t *const type = skip_typeref(var->declaration.type);
2142 ir_mode *const mode = get_ir_mode_storage(type);
2144 res = get_value(var->variable.v.value_number, mode);
2145 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2146 set_value(var->variable.v.value_number, res);
2152 * Handle the assume optimizer hint.
2154 * @param dbi debug info
2155 * @param expr the IL assume expression
2157 static ir_node *handle_assume(expression_t const *const expr)
2159 switch (expr->kind) {
2160 case EXPR_BINARY_EQUAL:
2161 case EXPR_BINARY_NOTEQUAL:
2162 case EXPR_BINARY_LESS:
2163 case EXPR_BINARY_LESSEQUAL:
2164 case EXPR_BINARY_GREATER:
2165 case EXPR_BINARY_GREATEREQUAL: {
2166 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2167 return handle_assume_compare(dbgi, &expr->binary);
2175 static ir_node *create_cast(unary_expression_t const *const expr)
2177 type_t *const type = skip_typeref(expr->base.type);
2178 if (is_type_void(type))
2181 ir_node *value = expression_to_value(expr->value);
2182 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2183 type_t *const from_type = skip_typeref(expr->value->base.type);
2184 ir_mode *const mode = get_ir_mode_storage(type);
2185 /* check for conversion from / to __based types */
2186 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2187 const variable_t *from_var = from_type->pointer.base_variable;
2188 const variable_t *to_var = type->pointer.base_variable;
2189 if (from_var != to_var) {
2190 if (from_var != NULL) {
2191 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2192 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2193 value = new_d_Add(dbgi, value, base, mode);
2195 if (to_var != NULL) {
2196 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2197 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2198 value = new_d_Sub(dbgi, value, base, mode);
2203 return create_conv(dbgi, value, mode);
2206 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2208 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2209 type_t *const type = skip_typeref(expr->base.type);
2210 ir_mode *const mode = get_ir_mode_arithmetic(type);
2211 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2212 return new_d_Not(dbgi, value, mode);
2215 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2217 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2218 ir_node *value = expression_to_value(expr->value);
2219 type_t *const value_type = skip_typeref(expr->value->base.type);
2220 assert(is_type_pointer(value_type));
2222 /* check for __based */
2223 variable_t const *const base_var = value_type->pointer.base_variable;
2225 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2226 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2227 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2229 type_t *const points_to = value_type->pointer.points_to;
2230 return deref_address(dbgi, points_to, value);
2233 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2235 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2236 type_t *const type = skip_typeref(expr->base.type);
2237 ir_mode *const mode = get_ir_mode_arithmetic(type);
2238 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2239 return new_d_Minus(dbgi, value, mode);
2242 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2243 ir_node *value, type_t *type)
2245 ir_mode *const mode = get_ir_mode_storage(type_ptrdiff_t);
2246 assert(is_type_pointer(type));
2247 pointer_type_t *const pointer_type = &type->pointer;
2248 type_t *const points_to = skip_typeref(pointer_type->points_to);
2249 ir_node * elem_size = get_type_size_node(points_to);
2250 elem_size = create_conv(dbgi, elem_size, mode);
2251 value = create_conv(dbgi, value, mode);
2252 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2256 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2259 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2260 type_t *const type_left = skip_typeref(expr->left->base.type);
2261 type_t *const type_right = skip_typeref(expr->right->base.type);
2262 expression_kind_t const kind = expr->base.kind;
2264 case EXPR_BINARY_SHIFTLEFT:
2265 case EXPR_BINARY_SHIFTRIGHT:
2266 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2267 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2268 mode = get_ir_mode_arithmetic(expr->base.type);
2269 left = create_conv(dbgi, left, mode);
2270 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2273 case EXPR_BINARY_SUB:
2274 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2275 const pointer_type_t *const ptr_type = &type_left->pointer;
2277 mode = get_ir_mode_storage(expr->base.type);
2278 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2279 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2280 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2281 ir_node *const no_mem = new_NoMem();
2282 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2283 mode, op_pin_state_floats);
2284 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2287 case EXPR_BINARY_SUB_ASSIGN:
2288 if (is_type_pointer(type_left)) {
2289 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2290 mode = get_ir_mode_storage(type_left);
2295 case EXPR_BINARY_ADD:
2296 case EXPR_BINARY_ADD_ASSIGN:
2297 if (is_type_pointer(type_left)) {
2298 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2299 mode = get_ir_mode_storage(type_left);
2301 } else if (is_type_pointer(type_right)) {
2302 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2303 mode = get_ir_mode_storage(type_right);
2310 mode = get_ir_mode_arithmetic(type_right);
2311 left = create_conv(dbgi, left, mode);
2312 right = create_conv(dbgi, right, mode);
2317 case EXPR_BINARY_ADD_ASSIGN:
2318 case EXPR_BINARY_ADD:
2319 return new_d_Add(dbgi, left, right, mode);
2320 case EXPR_BINARY_SUB_ASSIGN:
2321 case EXPR_BINARY_SUB:
2322 return new_d_Sub(dbgi, left, right, mode);
2323 case EXPR_BINARY_MUL_ASSIGN:
2324 case EXPR_BINARY_MUL:
2325 return new_d_Mul(dbgi, left, right, mode);
2326 case EXPR_BINARY_BITWISE_AND:
2327 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2328 return new_d_And(dbgi, left, right, mode);
2329 case EXPR_BINARY_BITWISE_OR:
2330 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2331 return new_d_Or(dbgi, left, right, mode);
2332 case EXPR_BINARY_BITWISE_XOR:
2333 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2334 return new_d_Eor(dbgi, left, right, mode);
2335 case EXPR_BINARY_SHIFTLEFT:
2336 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2337 return new_d_Shl(dbgi, left, right, mode);
2338 case EXPR_BINARY_SHIFTRIGHT:
2339 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2340 if (mode_is_signed(mode)) {
2341 return new_d_Shrs(dbgi, left, right, mode);
2343 return new_d_Shr(dbgi, left, right, mode);
2345 case EXPR_BINARY_DIV:
2346 case EXPR_BINARY_DIV_ASSIGN: {
2347 ir_node *pin = new_Pin(new_NoMem());
2348 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2349 op_pin_state_floats);
2350 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2353 case EXPR_BINARY_MOD:
2354 case EXPR_BINARY_MOD_ASSIGN: {
2355 ir_node *pin = new_Pin(new_NoMem());
2356 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2357 op_pin_state_floats);
2358 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2362 panic("unexpected expression kind");
2366 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2368 ir_node *const left = expression_to_value(expr->left);
2369 ir_node *const right = expression_to_value(expr->right);
2370 return create_op(expr, left, right);
2374 * Check if a given expression is a GNU __builtin_expect() call.
2376 static bool is_builtin_expect(const expression_t *expression)
2378 if (expression->kind != EXPR_CALL)
2381 expression_t *function = expression->call.function;
2382 if (function->kind != EXPR_REFERENCE)
2384 reference_expression_t *ref = &function->reference;
2385 if (ref->entity->kind != ENTITY_FUNCTION ||
2386 ref->entity->function.btk != BUILTIN_EXPECT)
2392 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)
2394 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2395 ir_node *const cmp = new_d_Cmp(dbgi, left, right, relation);
2396 if (is_Const(cmp)) {
2397 if (tarval_is_null(get_Const_tarval(cmp))) {
2398 jump_to_target(false_target);
2400 jump_to_target(true_target);
2403 ir_node *const cond = new_d_Cond(dbgi, cmp);
2404 ir_node *const true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2405 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2407 /* set branch prediction info based on __builtin_expect */
2408 if (is_builtin_expect(expr) && is_Cond(cond)) {
2409 call_argument_t *const argument = expr->call.arguments->next;
2410 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2411 bool const cnst = fold_constant_to_bool(argument->expression);
2412 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2413 set_Cond_jmp_pred(cond, pred);
2417 add_pred_to_jump_target(true_target, true_proj);
2418 add_pred_to_jump_target(false_target, false_proj);
2420 set_unreachable_now();
2423 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2425 ir_node *val = NULL;
2426 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2427 ir_mode *const mode = get_ir_mode_storage(expr->base.type);
2428 jump_target exit_target;
2429 init_jump_target(&exit_target, NULL);
2431 if (enter_jump_target(true_target)) {
2432 jump_to_target(&exit_target);
2433 val = new_d_Const(dbgi, get_mode_one(mode));
2436 if (enter_jump_target(false_target)) {
2437 jump_to_target(&exit_target);
2438 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2440 ir_node *const in[] = { val, zero };
2441 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2447 if (!enter_jump_target(&exit_target)) {
2448 set_cur_block(new_Block(0, NULL));
2449 val = new_d_Bad(dbgi, mode);
2454 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2456 ir_node *const right = expression_to_value(expr->right);
2457 expression_t const *const left_expr = expr->left;
2458 ir_node *const addr = expression_to_addr(left_expr);
2459 ir_node *const left = get_value_from_lvalue(left_expr, addr);
2460 ir_node *result = create_op(expr, left, right);
2462 type_t *const type = skip_typeref(expr->base.type);
2463 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2464 jump_target true_target;
2465 jump_target false_target;
2466 init_jump_target(&true_target, NULL);
2467 init_jump_target(&false_target, NULL);
2468 ir_mode *const mode = get_irn_mode(result);
2469 ir_node *const zero = new_Const(get_mode_null(mode));
2470 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2471 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2474 return set_value_for_expression_addr(left_expr, result, addr);
2477 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2479 ir_node *const addr = expression_to_addr(expr->left);
2480 ir_node *const right = expression_to_value(expr->right);
2481 return set_value_for_expression_addr(expr->left, right, addr);
2484 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2486 expression_to_value(expr->left);
2487 return expression_to_value(expr->right);
2490 static ir_node *array_access_addr(const array_access_expression_t *expression)
2492 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2493 ir_node *base_addr = expression_to_value(expression->array_ref);
2494 ir_node *offset = expression_to_value(expression->index);
2495 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2496 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2497 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2502 static ir_node *array_access_to_firm(
2503 const array_access_expression_t *expression)
2505 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2506 ir_node *addr = array_access_addr(expression);
2507 type_t *type = revert_automatic_type_conversion(
2508 (const expression_t*) expression);
2509 type = skip_typeref(type);
2511 return deref_address(dbgi, type, addr);
2514 static long get_offsetof_offset(const offsetof_expression_t *expression)
2516 type_t *orig_type = expression->type;
2519 designator_t *designator = expression->designator;
2520 for ( ; designator != NULL; designator = designator->next) {
2521 type_t *type = skip_typeref(orig_type);
2522 /* be sure the type is constructed */
2523 (void) get_ir_type(type);
2525 if (designator->symbol != NULL) {
2526 assert(is_type_compound(type));
2527 symbol_t *symbol = designator->symbol;
2529 compound_t *compound = type->compound.compound;
2530 entity_t *iter = compound->members.entities;
2531 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2533 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2534 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2535 offset += get_entity_offset(iter->compound_member.entity);
2537 orig_type = iter->declaration.type;
2539 expression_t *array_index = designator->array_index;
2540 assert(designator->array_index != NULL);
2541 assert(is_type_array(type));
2543 long index = fold_constant_to_int(array_index);
2544 ir_type *arr_type = get_ir_type(type);
2545 ir_type *elem_type = get_array_element_type(arr_type);
2546 long elem_size = get_type_size_bytes(elem_type);
2548 offset += index * elem_size;
2550 orig_type = type->array.element_type;
2557 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2559 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2560 long offset = get_offsetof_offset(expression);
2561 ir_tarval *tv = new_tarval_from_long(offset, mode);
2562 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2564 return new_d_Const(dbgi, tv);
2567 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2568 ir_entity *entity, type_t *type);
2569 static ir_initializer_t *create_ir_initializer(
2570 const initializer_t *initializer, type_t *type);
2572 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2573 initializer_t *initializer,
2576 /* create the ir_initializer */
2577 PUSH_IRG(get_const_code_irg());
2578 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2581 ident *const id = id_unique("initializer.%u");
2582 ir_type *const irtype = get_ir_type(type);
2583 ir_type *const global_type = get_glob_type();
2584 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2585 set_entity_ld_ident(entity, id);
2586 set_entity_visibility(entity, ir_visibility_private);
2587 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2588 set_entity_initializer(entity, irinitializer);
2592 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2594 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2595 type_t *type = expression->type;
2596 initializer_t *initializer = expression->initializer;
2598 if (expression->global_scope ||
2599 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2600 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2601 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2602 return create_symconst(dbgi, entity);
2604 /* create an entity on the stack */
2605 ident *const id = id_unique("CompLit.%u");
2606 ir_type *const irtype = get_ir_type(type);
2607 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2609 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2610 set_entity_ld_ident(entity, id);
2612 /* create initialisation code */
2613 create_local_initializer(initializer, dbgi, entity, type);
2615 /* create a sel for the compound literal address */
2616 ir_node *frame = get_irg_frame(current_ir_graph);
2617 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2622 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2624 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2625 type_t *const type = expr->type;
2626 ir_node *const addr = compound_literal_addr(expr);
2627 return deref_address(dbgi, type, addr);
2631 * Transform a sizeof expression into Firm code.
2633 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2635 type_t *const type = skip_typeref(expression->type);
2636 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2637 if (is_type_array(type) && type->array.is_vla
2638 && expression->tp_expression != NULL) {
2639 expression_to_value(expression->tp_expression);
2642 return get_type_size_node(type);
2645 static entity_t *get_expression_entity(const expression_t *expression)
2647 if (expression->kind != EXPR_REFERENCE)
2650 return expression->reference.entity;
2653 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2655 switch (entity->kind) {
2656 case DECLARATION_KIND_CASES:
2657 return entity->declaration.alignment;
2660 return entity->compound.alignment;
2661 case ENTITY_TYPEDEF:
2662 return entity->typedefe.alignment;
2670 * Transform an alignof expression into Firm code.
2672 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2674 unsigned alignment = 0;
2676 const expression_t *tp_expression = expression->tp_expression;
2677 if (tp_expression != NULL) {
2678 entity_t *entity = get_expression_entity(tp_expression);
2679 if (entity != NULL) {
2680 alignment = get_cparser_entity_alignment(entity);
2684 if (alignment == 0) {
2685 type_t *type = expression->type;
2686 alignment = get_type_alignment(type);
2689 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2690 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2691 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2692 return new_d_Const(dbgi, tv);
2695 static void init_ir_types(void);
2697 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2699 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2701 bool constant_folding_old = constant_folding;
2702 constant_folding = true;
2703 int old_optimize = get_optimize();
2704 int old_constant_folding = get_opt_constant_folding();
2706 set_opt_constant_folding(1);
2710 PUSH_IRG(get_const_code_irg());
2711 ir_node *const cnst = expression_to_value(expression);
2714 set_optimize(old_optimize);
2715 set_opt_constant_folding(old_constant_folding);
2716 constant_folding = constant_folding_old;
2718 if (!is_Const(cnst))
2719 panic("couldn't fold constant");
2720 return get_Const_tarval(cnst);
2723 /* this function is only used in parser.c, but it relies on libfirm functionality */
2724 bool constant_is_negative(const expression_t *expression)
2726 ir_tarval *tv = fold_constant_to_tarval(expression);
2727 return tarval_is_negative(tv);
2730 long fold_constant_to_int(const expression_t *expression)
2732 ir_tarval *tv = fold_constant_to_tarval(expression);
2733 if (!tarval_is_long(tv)) {
2734 panic("result of constant folding is not integer");
2737 return get_tarval_long(tv);
2740 bool fold_constant_to_bool(const expression_t *expression)
2742 ir_tarval *tv = fold_constant_to_tarval(expression);
2743 return !tarval_is_null(tv);
2746 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2748 jump_target true_target;
2749 jump_target false_target;
2750 init_jump_target(&true_target, NULL);
2751 init_jump_target(&false_target, NULL);
2752 ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2754 ir_node *val = NULL;
2755 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2756 type_t *const type = skip_typeref(expression->base.type);
2757 ir_mode *const mode = get_ir_mode_arithmetic(type);
2758 jump_target exit_target;
2759 init_jump_target(&exit_target, NULL);
2761 if (enter_jump_target(&true_target)) {
2762 if (expression->true_expression) {
2763 val = expression_to_value(expression->true_expression);
2764 } else if (cond_expr) {
2767 /* Condition ended with a short circuit (&&, ||, !) operation or a
2768 * comparison. Generate a "1" as value for the true branch. */
2769 val = new_Const(get_mode_one(mode));
2772 val = create_conv(dbgi, val, mode);
2773 jump_to_target(&exit_target);
2776 if (enter_jump_target(&false_target)) {
2777 ir_node *false_val = expression_to_value(expression->false_expression);
2779 false_val = create_conv(dbgi, false_val, mode);
2780 jump_to_target(&exit_target);
2782 ir_node *const in[] = { val, false_val };
2783 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2789 if (!enter_jump_target(&exit_target)) {
2790 set_cur_block(new_Block(0, NULL));
2791 if (!is_type_void(type))
2792 val = new_Bad(mode);
2798 * Returns an IR-node representing the address of a field.
2800 static ir_node *select_addr(const select_expression_t *expression)
2802 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2804 construct_select_compound(expression);
2806 ir_node *compound_addr = expression_to_value(expression->compound);
2808 entity_t *entry = expression->compound_entry;
2809 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2810 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2812 if (constant_folding) {
2813 ir_mode *mode = get_irn_mode(compound_addr);
2814 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2815 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2816 return new_d_Add(dbgi, compound_addr, ofs, mode);
2818 ir_entity *irentity = entry->compound_member.entity;
2819 assert(irentity != NULL);
2820 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2824 static ir_node *select_to_firm(const select_expression_t *expression)
2826 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2827 ir_node *addr = select_addr(expression);
2828 type_t *type = revert_automatic_type_conversion(
2829 (const expression_t*) expression);
2830 type = skip_typeref(type);
2832 entity_t *entry = expression->compound_entry;
2833 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2835 if (entry->compound_member.bitfield) {
2836 return bitfield_extract_to_firm(expression, addr);
2839 return deref_address(dbgi, type, addr);
2842 /* Values returned by __builtin_classify_type. */
2843 typedef enum gcc_type_class
2849 enumeral_type_class,
2852 reference_type_class,
2856 function_type_class,
2867 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2869 type_t *type = expr->type_expression->base.type;
2871 /* FIXME gcc returns different values depending on whether compiling C or C++
2872 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2875 type = skip_typeref(type);
2876 switch (type->kind) {
2878 const atomic_type_t *const atomic_type = &type->atomic;
2879 switch (atomic_type->akind) {
2880 /* gcc cannot do that */
2881 case ATOMIC_TYPE_VOID:
2882 tc = void_type_class;
2885 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2886 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2887 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2888 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2889 case ATOMIC_TYPE_SHORT:
2890 case ATOMIC_TYPE_USHORT:
2891 case ATOMIC_TYPE_INT:
2892 case ATOMIC_TYPE_UINT:
2893 case ATOMIC_TYPE_LONG:
2894 case ATOMIC_TYPE_ULONG:
2895 case ATOMIC_TYPE_LONGLONG:
2896 case ATOMIC_TYPE_ULONGLONG:
2897 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2898 tc = integer_type_class;
2901 case ATOMIC_TYPE_FLOAT:
2902 case ATOMIC_TYPE_DOUBLE:
2903 case ATOMIC_TYPE_LONG_DOUBLE:
2904 tc = real_type_class;
2907 panic("Unexpected atomic type.");
2910 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2911 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2912 case TYPE_ARRAY: /* gcc handles this as pointer */
2913 case TYPE_FUNCTION: /* gcc handles this as pointer */
2914 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2915 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2916 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2918 /* gcc handles this as integer */
2919 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2921 /* gcc classifies the referenced type */
2922 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2924 /* typedef/typeof should be skipped already */
2930 panic("unexpected type.");
2934 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2935 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
2936 ir_tarval *const tv = new_tarval_from_long(tc, mode);
2937 return new_d_Const(dbgi, tv);
2940 static ir_node *function_name_to_firm(
2941 const funcname_expression_t *const expr)
2943 switch (expr->kind) {
2944 case FUNCNAME_FUNCTION:
2945 case FUNCNAME_PRETTY_FUNCTION:
2946 case FUNCNAME_FUNCDNAME:
2947 if (current_function_name == NULL) {
2948 position_t const *const src_pos = &expr->base.pos;
2949 char const *const name = current_function_entity->base.symbol->string;
2950 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
2951 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2953 return current_function_name;
2954 case FUNCNAME_FUNCSIG:
2955 if (current_funcsig == NULL) {
2956 position_t const *const src_pos = &expr->base.pos;
2957 ir_entity *const ent = get_irg_entity(current_ir_graph);
2958 char const *const name = get_entity_ld_name(ent);
2959 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
2960 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2962 return current_funcsig;
2964 panic("Unsupported function name");
2967 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2969 statement_t *statement = expr->statement;
2971 assert(statement->kind == STATEMENT_COMPOUND);
2972 return compound_statement_to_firm(&statement->compound);
2975 static ir_node *va_start_expression_to_firm(
2976 const va_start_expression_t *const expr)
2978 ir_entity *param_ent = current_vararg_entity;
2979 if (param_ent == NULL) {
2980 size_t const n = IR_VA_START_PARAMETER_NUMBER;
2981 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
2982 ir_type *const param_type = get_unknown_type();
2983 param_ent = new_parameter_entity(frame_type, n, param_type);
2984 current_vararg_entity = param_ent;
2987 ir_node *const frame = get_irg_frame(current_ir_graph);
2988 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2989 ir_node *const no_mem = new_NoMem();
2990 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
2992 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
2997 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2999 type_t *const type = expr->base.type;
3000 expression_t *const ap_expr = expr->ap;
3001 ir_node *const ap_addr = expression_to_addr(ap_expr);
3002 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3003 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3004 ir_node *const res = deref_address(dbgi, type, ap);
3006 ir_node *const cnst = get_type_size_node(expr->base.type);
3007 ir_mode *const mode = get_irn_mode(cnst);
3008 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3009 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3010 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3011 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3012 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3014 set_value_for_expression_addr(ap_expr, add, ap_addr);
3020 * Generate Firm for a va_copy expression.
3022 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3024 ir_node *const src = expression_to_value(expr->src);
3025 set_value_for_expression_addr(expr->dst, src, NULL);
3029 static ir_node *dereference_addr(const unary_expression_t *const expression)
3031 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3032 return expression_to_value(expression->value);
3036 * Returns a IR-node representing an lvalue of the given expression.
3038 static ir_node *expression_to_addr(const expression_t *expression)
3040 switch (expression->kind) {
3041 case EXPR_ARRAY_ACCESS:
3042 return array_access_addr(&expression->array_access);
3043 case EXPR_COMPOUND_LITERAL:
3044 return compound_literal_addr(&expression->compound_literal);
3045 case EXPR_REFERENCE:
3046 return reference_addr(&expression->reference);
3048 return select_addr(&expression->select);
3049 case EXPR_UNARY_DEREFERENCE:
3050 return dereference_addr(&expression->unary);
3054 panic("trying to get address of non-lvalue");
3057 static ir_node *builtin_constant_to_firm(
3058 const builtin_constant_expression_t *expression)
3060 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3061 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3062 return create_Const_from_bool(mode, v);
3065 static ir_node *builtin_types_compatible_to_firm(
3066 const builtin_types_compatible_expression_t *expression)
3068 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3069 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3070 bool const value = types_compatible(left, right);
3071 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3072 return create_Const_from_bool(mode, value);
3075 static void prepare_label_target(label_t *const label)
3077 if (label->address_taken && !label->indirect_block) {
3078 ir_node *const iblock = new_immBlock();
3079 label->indirect_block = iblock;
3080 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3081 jump_from_block_to_target(&label->target, iblock);
3086 * Pointer to a label. This is used for the
3087 * GNU address-of-label extension.
3089 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3091 /* Beware: Might be called from create initializer with current_ir_graph
3092 * set to const_code_irg. */
3093 PUSH_IRG(current_function);
3094 prepare_label_target(label->label);
3097 symconst_symbol value;
3098 value.entity_p = create_Block_entity(label->label->indirect_block);
3099 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3100 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3103 static ir_node *expression_to_value(expression_t const *const expr)
3106 if (!constant_folding) {
3107 assert(!expr->base.transformed);
3108 ((expression_t*)expr)->base.transformed = true;
3112 switch (expr->kind) {
3113 case EXPR_UNARY_CAST:
3114 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3115 case EXPR_BINARY_EQUAL:
3116 case EXPR_BINARY_GREATER:
3117 case EXPR_BINARY_GREATEREQUAL:
3118 case EXPR_BINARY_ISGREATER:
3119 case EXPR_BINARY_ISGREATEREQUAL:
3120 case EXPR_BINARY_ISLESS:
3121 case EXPR_BINARY_ISLESSEQUAL:
3122 case EXPR_BINARY_ISLESSGREATER:
3123 case EXPR_BINARY_ISUNORDERED:
3124 case EXPR_BINARY_LESS:
3125 case EXPR_BINARY_LESSEQUAL:
3126 case EXPR_BINARY_LOGICAL_AND:
3127 case EXPR_BINARY_LOGICAL_OR:
3128 case EXPR_BINARY_NOTEQUAL:
3129 case EXPR_UNARY_NOT:;
3130 jump_target true_target;
3131 jump_target false_target;
3132 init_jump_target(&true_target, NULL);
3133 init_jump_target(&false_target, NULL);
3134 expression_to_control_flow(expr, &true_target, &false_target);
3135 return control_flow_to_1_0(expr, &true_target, &false_target);
3137 return create_cast(&expr->unary);
3140 case EXPR_BINARY_ADD:
3141 case EXPR_BINARY_BITWISE_AND:
3142 case EXPR_BINARY_BITWISE_OR:
3143 case EXPR_BINARY_BITWISE_XOR:
3144 case EXPR_BINARY_DIV:
3145 case EXPR_BINARY_MOD:
3146 case EXPR_BINARY_MUL:
3147 case EXPR_BINARY_SHIFTLEFT:
3148 case EXPR_BINARY_SHIFTRIGHT:
3149 case EXPR_BINARY_SUB:
3150 return binop_to_firm(&expr->binary);
3152 case EXPR_BINARY_ADD_ASSIGN:
3153 case EXPR_BINARY_BITWISE_AND_ASSIGN:
3154 case EXPR_BINARY_BITWISE_OR_ASSIGN:
3155 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3156 case EXPR_BINARY_DIV_ASSIGN:
3157 case EXPR_BINARY_MOD_ASSIGN:
3158 case EXPR_BINARY_MUL_ASSIGN:
3159 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3160 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3161 case EXPR_BINARY_SUB_ASSIGN:
3162 return binop_assign_to_firm(&expr->binary);
3167 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3168 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
3169 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
3170 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
3172 return incdec_to_firm(&expr->unary, inc, pre);
3175 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3176 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3177 case EXPR_BINARY_ASSIGN: return assign_expression_to_firm( &expr->binary);
3178 case EXPR_BINARY_COMMA: return comma_expression_to_firm( &expr->binary);
3179 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3180 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3181 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3182 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3183 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3184 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3185 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3186 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3187 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3188 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3189 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3190 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3191 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3192 case EXPR_SELECT: return select_to_firm( &expr->select);
3193 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3194 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3195 case EXPR_STRING_LITERAL: return string_to_firm( &expr->base.pos, "str.%u", &expr->string_literal.value);
3196 case EXPR_UNARY_ASSUME: return handle_assume( expr->unary.value);
3197 case EXPR_UNARY_COMPLEMENT: return complement_to_firm( &expr->unary);
3198 case EXPR_UNARY_DEREFERENCE: return dereference_to_firm( &expr->unary);
3199 case EXPR_UNARY_NEGATE: return negate_to_firm( &expr->unary);
3200 case EXPR_UNARY_PLUS: return expression_to_value( expr->unary.value);
3201 case EXPR_UNARY_TAKE_ADDRESS: return expression_to_addr( expr->unary.value);
3202 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3203 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3204 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3206 case EXPR_UNARY_DELETE:
3207 case EXPR_UNARY_DELETE_ARRAY:
3208 case EXPR_UNARY_THROW:
3209 panic("expression not implemented");
3214 panic("invalid expression");
3218 * create a short-circuit expression evaluation that tries to construct
3219 * efficient control flow structures for &&, || and ! expressions
3221 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3223 switch (expr->kind) {
3224 case EXPR_UNARY_NOT:
3225 expression_to_control_flow(expr->unary.value, false_target, true_target);
3228 case EXPR_BINARY_LOGICAL_AND: {
3229 jump_target extra_target;
3230 init_jump_target(&extra_target, NULL);
3231 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3232 if (enter_jump_target(&extra_target))
3233 expression_to_control_flow(expr->binary.right, true_target, false_target);
3237 case EXPR_BINARY_LOGICAL_OR: {
3238 jump_target extra_target;
3239 init_jump_target(&extra_target, NULL);
3240 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3241 if (enter_jump_target(&extra_target))
3242 expression_to_control_flow(expr->binary.right, true_target, false_target);
3246 case EXPR_BINARY_COMMA:
3247 expression_to_value(expr->binary.left);
3248 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3253 ir_relation relation;
3254 case EXPR_BINARY_EQUAL:
3255 case EXPR_BINARY_GREATER:
3256 case EXPR_BINARY_GREATEREQUAL:
3257 case EXPR_BINARY_ISGREATER:
3258 case EXPR_BINARY_ISGREATEREQUAL:
3259 case EXPR_BINARY_ISLESS:
3260 case EXPR_BINARY_ISLESSEQUAL:
3261 case EXPR_BINARY_ISLESSGREATER:
3262 case EXPR_BINARY_ISUNORDERED:
3263 case EXPR_BINARY_LESS:
3264 case EXPR_BINARY_LESSEQUAL:
3265 case EXPR_BINARY_NOTEQUAL: {
3266 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3267 type_t *const type = skip_typeref(expr->binary.left->base.type);
3268 ir_mode *const mode = get_ir_mode_arithmetic(type);
3270 left = create_conv(dbgi, expression_to_value(expr->binary.left), mode);
3271 right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3272 relation = get_relation(expr->kind);
3276 case EXPR_UNARY_CAST:
3277 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3278 expression_to_control_flow(expr->unary.value, true_target, false_target);
3282 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3283 type_t *const type = skip_typeref(expr->base.type);
3284 ir_mode *const mode = get_ir_mode_arithmetic(type);
3285 val = create_conv(dbgi, expression_to_value(expr), mode);
3287 right = new_Const(get_mode_null(get_irn_mode(val)));
3288 relation = ir_relation_unordered_less_greater;
3290 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3296 static void create_variable_entity(entity_t *variable,
3297 declaration_kind_t declaration_kind,
3298 ir_type *parent_type)
3300 assert(variable->kind == ENTITY_VARIABLE);
3301 type_t *type = skip_typeref(variable->declaration.type);
3303 ident *const id = new_id_from_str(variable->base.symbol->string);
3304 ir_type *const irtype = get_ir_type(type);
3305 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
3306 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3307 unsigned alignment = variable->declaration.alignment;
3309 set_entity_alignment(irentity, alignment);
3311 handle_decl_modifiers(irentity, variable);
3313 variable->declaration.kind = (unsigned char) declaration_kind;
3314 variable->variable.v.entity = irentity;
3315 set_entity_ld_ident(irentity, create_ld_ident(variable));
3317 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3318 set_entity_volatility(irentity, volatility_is_volatile);
3323 typedef struct type_path_entry_t type_path_entry_t;
3324 struct type_path_entry_t {
3326 ir_initializer_t *initializer;
3328 entity_t *compound_entry;
3331 typedef struct type_path_t type_path_t;
3332 struct type_path_t {
3333 type_path_entry_t *path;
3338 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3340 size_t len = ARR_LEN(path->path);
3342 for (size_t i = 0; i < len; ++i) {
3343 const type_path_entry_t *entry = & path->path[i];
3345 type_t *type = skip_typeref(entry->type);
3346 if (is_type_compound(type)) {
3347 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3348 } else if (is_type_array(type)) {
3349 fprintf(stderr, "[%u]", (unsigned) entry->index);
3351 fprintf(stderr, "-INVALID-");
3354 fprintf(stderr, " (");
3355 print_type(path->top_type);
3356 fprintf(stderr, ")");
3359 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3361 size_t len = ARR_LEN(path->path);
3363 return & path->path[len-1];
3366 static type_path_entry_t *append_to_type_path(type_path_t *path)
3368 size_t len = ARR_LEN(path->path);
3369 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3371 type_path_entry_t *result = & path->path[len];
3372 memset(result, 0, sizeof(result[0]));
3376 static size_t get_compound_member_count(const compound_type_t *type)
3378 compound_t *compound = type->compound;
3379 size_t n_members = 0;
3380 entity_t *member = compound->members.entities;
3381 for ( ; member != NULL; member = member->base.next) {
3388 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3390 type_t *orig_top_type = path->top_type;
3391 type_t *top_type = skip_typeref(orig_top_type);
3393 assert(is_type_compound(top_type) || is_type_array(top_type));
3395 if (ARR_LEN(path->path) == 0) {
3398 type_path_entry_t *top = get_type_path_top(path);
3399 ir_initializer_t *initializer = top->initializer;
3400 return get_initializer_compound_value(initializer, top->index);
3404 static void descend_into_subtype(type_path_t *path)
3406 type_t *orig_top_type = path->top_type;
3407 type_t *top_type = skip_typeref(orig_top_type);
3409 assert(is_type_compound(top_type) || is_type_array(top_type));
3411 ir_initializer_t *initializer = get_initializer_entry(path);
3413 type_path_entry_t *top = append_to_type_path(path);
3414 top->type = top_type;
3418 if (is_type_compound(top_type)) {
3419 compound_t *const compound = top_type->compound.compound;
3420 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3422 top->compound_entry = entry;
3424 len = get_compound_member_count(&top_type->compound);
3425 if (entry != NULL) {
3426 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3427 path->top_type = entry->declaration.type;
3430 assert(is_type_array(top_type));
3431 assert(top_type->array.size > 0);
3434 path->top_type = top_type->array.element_type;
3435 len = top_type->array.size;
3437 if (initializer == NULL
3438 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3439 initializer = create_initializer_compound(len);
3440 /* we have to set the entry at the 2nd latest path entry... */
3441 size_t path_len = ARR_LEN(path->path);
3442 assert(path_len >= 1);
3444 type_path_entry_t *entry = & path->path[path_len-2];
3445 ir_initializer_t *tinitializer = entry->initializer;
3446 set_initializer_compound_value(tinitializer, entry->index,
3450 top->initializer = initializer;
3453 static void ascend_from_subtype(type_path_t *path)
3455 type_path_entry_t *top = get_type_path_top(path);
3457 path->top_type = top->type;
3459 size_t len = ARR_LEN(path->path);
3460 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3463 static void walk_designator(type_path_t *path, const designator_t *designator)
3465 /* designators start at current object type */
3466 ARR_RESIZE(type_path_entry_t, path->path, 1);
3468 for ( ; designator != NULL; designator = designator->next) {
3469 type_path_entry_t *top = get_type_path_top(path);
3470 type_t *orig_type = top->type;
3471 type_t *type = skip_typeref(orig_type);
3473 if (designator->symbol != NULL) {
3474 assert(is_type_compound(type));
3476 symbol_t *symbol = designator->symbol;
3478 compound_t *compound = type->compound.compound;
3479 entity_t *iter = compound->members.entities;
3480 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3481 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3483 /* revert previous initialisations of other union elements */
3484 if (type->kind == TYPE_COMPOUND_UNION) {
3485 ir_initializer_t *initializer = top->initializer;
3486 if (initializer != NULL
3487 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3488 /* are we writing to a new element? */
3489 ir_initializer_t *oldi
3490 = get_initializer_compound_value(initializer, index);
3491 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3492 /* clear initializer */
3494 = get_initializer_compound_n_entries(initializer);
3495 ir_initializer_t *nulli = get_initializer_null();
3496 for (size_t i = 0; i < len; ++i) {
3497 set_initializer_compound_value(initializer, i,
3504 top->type = orig_type;
3505 top->compound_entry = iter;
3507 orig_type = iter->declaration.type;
3509 expression_t *array_index = designator->array_index;
3510 assert(is_type_array(type));
3512 long index = fold_constant_to_int(array_index);
3513 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3515 top->type = orig_type;
3516 top->index = (size_t) index;
3517 orig_type = type->array.element_type;
3519 path->top_type = orig_type;
3521 if (designator->next != NULL) {
3522 descend_into_subtype(path);
3526 path->invalid = false;
3529 static void advance_current_object(type_path_t *path)
3531 if (path->invalid) {
3532 /* TODO: handle this... */
3533 panic("invalid initializer (excessive elements)");
3536 type_path_entry_t *top = get_type_path_top(path);
3538 type_t *type = skip_typeref(top->type);
3539 if (is_type_union(type)) {
3540 /* only the first element is initialized in unions */
3541 top->compound_entry = NULL;
3542 } else if (is_type_struct(type)) {
3543 entity_t *entry = top->compound_entry;
3546 entry = skip_unnamed_bitfields(entry->base.next);
3547 top->compound_entry = entry;
3548 if (entry != NULL) {
3549 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3550 path->top_type = entry->declaration.type;
3554 assert(is_type_array(type));
3557 if (!type->array.size_constant || top->index < type->array.size) {
3562 /* we're past the last member of the current sub-aggregate, try if we
3563 * can ascend in the type hierarchy and continue with another subobject */
3564 size_t len = ARR_LEN(path->path);
3567 ascend_from_subtype(path);
3568 advance_current_object(path);
3570 path->invalid = true;
3575 static ir_initializer_t *create_ir_initializer_value(
3576 const initializer_value_t *initializer)
3578 expression_t *expr = initializer->value;
3579 type_t *type = skip_typeref(expr->base.type);
3581 if (is_type_compound(type)) {
3582 if (expr->kind == EXPR_UNARY_CAST) {
3583 expr = expr->unary.value;
3584 type = skip_typeref(expr->base.type);
3586 /* must be a compound literal... */
3587 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3588 return create_ir_initializer(expr->compound_literal.initializer,
3593 ir_node *value = expression_to_value(expr);
3594 value = conv_to_storage_type(NULL, value, type);
3595 return create_initializer_const(value);
3598 /** Tests whether type can be initialized by a string constant */
3599 static bool is_string_type(type_t *type)
3601 if (!is_type_array(type))
3604 type_t *const inner = skip_typeref(type->array.element_type);
3605 return is_type_integer(inner);
3608 static ir_initializer_t *create_ir_initializer_list(
3609 const initializer_list_t *initializer, type_t *type)
3612 memset(&path, 0, sizeof(path));
3613 path.top_type = type;
3614 path.path = NEW_ARR_F(type_path_entry_t, 0);
3616 descend_into_subtype(&path);
3618 for (size_t i = 0; i < initializer->len; ++i) {
3619 const initializer_t *sub_initializer = initializer->initializers[i];
3621 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3622 walk_designator(&path, sub_initializer->designator.designator);
3626 if (sub_initializer->kind == INITIALIZER_VALUE) {
3627 const expression_t *expr = sub_initializer->value.value;
3628 const type_t *expr_type = skip_typeref(expr->base.type);
3629 /* we might have to descend into types until the types match */
3631 type_t *orig_top_type = path.top_type;
3632 type_t *top_type = skip_typeref(orig_top_type);
3634 if (types_compatible(top_type, expr_type))
3636 descend_into_subtype(&path);
3638 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3639 /* we might have to descend into types until we're at a scalar
3642 type_t *orig_top_type = path.top_type;
3643 type_t *top_type = skip_typeref(orig_top_type);
3645 if (is_string_type(top_type))
3647 descend_into_subtype(&path);
3651 ir_initializer_t *sub_irinitializer
3652 = create_ir_initializer(sub_initializer, path.top_type);
3654 size_t path_len = ARR_LEN(path.path);
3655 assert(path_len >= 1);
3656 type_path_entry_t *entry = & path.path[path_len-1];
3657 ir_initializer_t *tinitializer = entry->initializer;
3658 set_initializer_compound_value(tinitializer, entry->index,
3661 advance_current_object(&path);
3664 assert(ARR_LEN(path.path) >= 1);
3665 ir_initializer_t *result = path.path[0].initializer;
3666 DEL_ARR_F(path.path);
3671 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3673 type = skip_typeref(type);
3675 assert(type->kind == TYPE_ARRAY);
3676 assert(type->array.size_constant);
3677 string_literal_expression_t const *const str = get_init_string(init);
3678 size_t const str_len = str->value.size;
3679 size_t const arr_len = type->array.size;
3680 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3681 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3682 char const * p = str->value.begin;
3683 switch (str->value.encoding) {
3684 case STRING_ENCODING_CHAR:
3685 case STRING_ENCODING_UTF8:
3686 for (size_t i = 0; i != arr_len; ++i) {
3687 char const c = i < str_len ? *p++ : 0;
3688 ir_tarval *const tv = new_tarval_from_long(c, mode);
3689 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3690 set_initializer_compound_value(irinit, i, tvinit);
3694 case STRING_ENCODING_CHAR16:
3695 case STRING_ENCODING_CHAR32:
3696 case STRING_ENCODING_WIDE:
3697 for (size_t i = 0; i != arr_len; ++i) {
3698 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3699 ir_tarval *const tv = new_tarval_from_long(c, mode);
3700 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3701 set_initializer_compound_value(irinit, i, tvinit);
3709 static ir_initializer_t *create_ir_initializer(
3710 const initializer_t *initializer, type_t *type)
3712 switch (initializer->kind) {
3713 case INITIALIZER_STRING:
3714 return create_ir_initializer_string(initializer, type);
3716 case INITIALIZER_LIST:
3717 return create_ir_initializer_list(&initializer->list, type);
3719 case INITIALIZER_VALUE:
3720 return create_ir_initializer_value(&initializer->value);
3722 case INITIALIZER_DESIGNATOR:
3723 panic("unexpected designator initializer");
3725 panic("unknown initializer");
3728 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3729 * are elements [...] the remainder of the aggregate shall be initialized
3730 * implicitly the same as objects that have static storage duration. */
3731 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3734 /* for unions we must NOT do anything for null initializers */
3735 ir_type *owner = get_entity_owner(entity);
3736 if (is_Union_type(owner)) {
3740 ir_type *ent_type = get_entity_type(entity);
3741 /* create sub-initializers for a compound type */
3742 if (is_compound_type(ent_type)) {
3743 unsigned n_members = get_compound_n_members(ent_type);
3744 for (unsigned n = 0; n < n_members; ++n) {
3745 ir_entity *member = get_compound_member(ent_type, n);
3746 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3748 create_dynamic_null_initializer(member, dbgi, addr);
3752 if (is_Array_type(ent_type)) {
3753 assert(has_array_upper_bound(ent_type, 0));
3754 long n = get_array_upper_bound_int(ent_type, 0);
3755 for (long i = 0; i < n; ++i) {
3756 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3757 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3758 ir_node *cnst = new_d_Const(dbgi, index_tv);
3759 ir_node *in[1] = { cnst };
3760 ir_entity *arrent = get_array_element_entity(ent_type);
3761 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3763 create_dynamic_null_initializer(arrent, dbgi, addr);
3768 ir_mode *value_mode = get_type_mode(ent_type);
3769 ir_node *node = new_Const(get_mode_null(value_mode));
3771 /* is it a bitfield type? */
3772 if (is_Primitive_type(ent_type) &&
3773 get_primitive_base_type(ent_type) != NULL) {
3774 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3778 ir_node *mem = get_store();
3779 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3780 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3784 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3785 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3787 switch (get_initializer_kind(initializer)) {
3788 case IR_INITIALIZER_NULL:
3789 create_dynamic_null_initializer(entity, dbgi, base_addr);
3791 case IR_INITIALIZER_CONST: {
3792 ir_node *node = get_initializer_const_value(initializer);
3793 ir_type *ent_type = get_entity_type(entity);
3795 /* is it a bitfield type? */
3796 if (is_Primitive_type(ent_type) &&
3797 get_primitive_base_type(ent_type) != NULL) {
3798 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3802 ir_node *mem = get_store();
3804 if (is_compound_type(ent_type)) {
3805 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3806 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3808 assert(get_type_mode(type) == get_irn_mode(node));
3809 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3810 new_mem = new_Proj(store, mode_M, pn_Store_M);
3815 case IR_INITIALIZER_TARVAL: {
3816 ir_tarval *tv = get_initializer_tarval_value(initializer);
3817 ir_node *cnst = new_d_Const(dbgi, tv);
3818 ir_type *ent_type = get_entity_type(entity);
3820 /* is it a bitfield type? */
3821 if (is_Primitive_type(ent_type) &&
3822 get_primitive_base_type(ent_type) != NULL) {
3823 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3827 assert(get_type_mode(type) == get_tarval_mode(tv));
3828 ir_node *mem = get_store();
3829 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3830 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3834 case IR_INITIALIZER_COMPOUND: {
3835 assert(is_compound_type(type) || is_Array_type(type));
3837 if (is_Array_type(type)) {
3838 assert(has_array_upper_bound(type, 0));
3839 n_members = get_array_upper_bound_int(type, 0);
3841 n_members = get_compound_n_members(type);
3844 if (get_initializer_compound_n_entries(initializer)
3845 != (unsigned) n_members)
3846 panic("initializer doesn't match compound type");
3848 for (int i = 0; i < n_members; ++i) {
3851 ir_entity *sub_entity;
3852 if (is_Array_type(type)) {
3853 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3854 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3855 ir_node *cnst = new_d_Const(dbgi, index_tv);
3856 ir_node *in[1] = { cnst };
3857 irtype = get_array_element_type(type);
3858 sub_entity = get_array_element_entity(type);
3859 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3862 sub_entity = get_compound_member(type, i);
3863 irtype = get_entity_type(sub_entity);
3864 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3868 ir_initializer_t *sub_init
3869 = get_initializer_compound_value(initializer, i);
3871 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3878 panic("invalid ir_initializer");
3881 static void create_dynamic_initializer(ir_initializer_t *initializer,
3882 dbg_info *dbgi, ir_entity *entity)
3884 ir_node *frame = get_irg_frame(current_ir_graph);
3885 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3886 ir_type *type = get_entity_type(entity);
3888 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3891 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3892 ir_entity *entity, type_t *type)
3894 ir_node *memory = get_store();
3895 ir_node *nomem = new_NoMem();
3896 ir_node *frame = get_irg_frame(current_ir_graph);
3897 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3899 if (initializer->kind == INITIALIZER_VALUE) {
3900 initializer_value_t *initializer_value = &initializer->value;
3902 ir_node *value = expression_to_value(initializer_value->value);
3903 type = skip_typeref(type);
3904 assign_value(dbgi, addr, type, value);
3908 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
3909 ir_initializer_t *irinitializer
3910 = create_ir_initializer(initializer, type);
3912 create_dynamic_initializer(irinitializer, dbgi, entity);
3916 /* create a "template" entity which is copied to the entity on the stack */
3917 ir_entity *const init_entity
3918 = create_initializer_entity(dbgi, initializer, type);
3919 ir_node *const src_addr = create_symconst(dbgi, init_entity);
3920 ir_type *const irtype = get_ir_type(type);
3921 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3923 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3924 set_store(copyb_mem);
3927 static void create_initializer_local_variable_entity(entity_t *entity)
3929 assert(entity->kind == ENTITY_VARIABLE);
3930 initializer_t *initializer = entity->variable.initializer;
3931 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
3932 ir_entity *irentity = entity->variable.v.entity;
3933 type_t *type = entity->declaration.type;
3935 create_local_initializer(initializer, dbgi, irentity, type);
3938 static void create_variable_initializer(entity_t *entity)
3940 assert(entity->kind == ENTITY_VARIABLE);
3941 initializer_t *initializer = entity->variable.initializer;
3942 if (initializer == NULL)
3945 declaration_kind_t declaration_kind
3946 = (declaration_kind_t) entity->declaration.kind;
3947 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3948 create_initializer_local_variable_entity(entity);
3952 type_t *type = entity->declaration.type;
3953 type_qualifiers_t tq = get_type_qualifier(type, true);
3955 if (initializer->kind == INITIALIZER_VALUE) {
3956 expression_t * value = initializer->value.value;
3957 type_t *const init_type = skip_typeref(value->base.type);
3959 if (!is_type_scalar(init_type)) {
3960 if (value->kind != EXPR_COMPOUND_LITERAL)
3961 panic("expected non-scalar initializer to be a compound literal");
3962 initializer = value->compound_literal.initializer;
3963 goto have_initializer;
3966 ir_node * node = expression_to_value(value);
3967 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
3968 node = conv_to_storage_type(dbgi, node, init_type);
3970 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3971 set_value(entity->variable.v.value_number, node);
3973 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3975 ir_entity *irentity = entity->variable.v.entity;
3977 if (tq & TYPE_QUALIFIER_CONST
3978 && get_entity_owner(irentity) != get_tls_type()) {
3979 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
3981 set_atomic_ent_value(irentity, node);
3985 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3986 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3988 ir_entity *irentity = entity->variable.v.entity;
3989 ir_initializer_t *irinitializer
3990 = create_ir_initializer(initializer, type);
3992 if (tq & TYPE_QUALIFIER_CONST) {
3993 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
3995 set_entity_initializer(irentity, irinitializer);
3999 static void create_variable_length_array(entity_t *entity)
4001 assert(entity->kind == ENTITY_VARIABLE);
4002 assert(entity->variable.initializer == NULL);
4004 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4005 entity->variable.v.vla_base = NULL;
4007 /* TODO: record VLA somewhere so we create the free node when we leave
4011 static void allocate_variable_length_array(entity_t *entity)
4013 assert(entity->kind == ENTITY_VARIABLE);
4014 assert(entity->variable.initializer == NULL);
4015 assert(currently_reachable());
4017 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4018 type_t *type = entity->declaration.type;
4019 ir_type *el_type = get_ir_type(type->array.element_type);
4021 /* make sure size_node is calculated */
4022 get_type_size_node(type);
4023 ir_node *elems = type->array.size_node;
4024 ir_node *mem = get_store();
4025 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4027 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4028 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4031 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4032 entity->variable.v.vla_base = addr;
4035 static bool var_needs_entity(variable_t const *const var)
4037 if (var->address_taken)
4039 type_t *const type = skip_typeref(var->base.type);
4040 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4044 * Creates a Firm local variable from a declaration.
4046 static void create_local_variable(entity_t *entity)
4048 assert(entity->kind == ENTITY_VARIABLE);
4049 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4051 if (!var_needs_entity(&entity->variable)) {
4052 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4053 entity->variable.v.value_number = next_value_number_function;
4054 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4055 ++next_value_number_function;
4059 /* is it a variable length array? */
4060 type_t *const type = skip_typeref(entity->declaration.type);
4061 if (is_type_array(type) && !type->array.size_constant) {
4062 create_variable_length_array(entity);
4066 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4067 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4070 static void create_local_static_variable(entity_t *entity)
4072 assert(entity->kind == ENTITY_VARIABLE);
4073 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4075 type_t *type = skip_typeref(entity->declaration.type);
4076 ir_type *const var_type = entity->variable.thread_local ?
4077 get_tls_type() : get_glob_type();
4078 ir_type *const irtype = get_ir_type(type);
4079 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4081 size_t l = strlen(entity->base.symbol->string);
4082 char buf[l + sizeof(".%u")];
4083 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4084 ident *const id = id_unique(buf);
4085 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4087 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4088 set_entity_volatility(irentity, volatility_is_volatile);
4091 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4092 entity->variable.v.entity = irentity;
4094 set_entity_ld_ident(irentity, id);
4095 set_entity_visibility(irentity, ir_visibility_local);
4097 if (entity->variable.initializer == NULL) {
4098 ir_initializer_t *null_init = get_initializer_null();
4099 set_entity_initializer(irentity, null_init);
4102 PUSH_IRG(get_const_code_irg());
4103 create_variable_initializer(entity);
4109 static ir_node *return_statement_to_firm(return_statement_t *statement)
4111 if (!currently_reachable())
4114 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4115 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4116 ir_node * res = statement->value ? expression_to_value(statement->value) : NULL;
4119 if (!is_type_void(type)) {
4121 res = conv_to_storage_type(dbgi, res, type);
4123 res = new_Unknown(get_ir_mode_storage(type));
4130 ir_node *const in[1] = { res };
4131 ir_node *const store = get_store();
4132 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4134 ir_node *end_block = get_irg_end_block(current_ir_graph);
4135 add_immBlock_pred(end_block, ret);
4137 set_unreachable_now();
4141 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4143 if (!currently_reachable())
4146 return expression_to_value(statement->expression);
4149 static void create_local_declarations(entity_t*);
4151 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4153 create_local_declarations(compound->scope.entities);
4155 ir_node *result = NULL;
4156 statement_t *statement = compound->statements;
4157 for ( ; statement != NULL; statement = statement->base.next) {
4158 result = statement_to_firm(statement);
4164 static void create_global_variable(entity_t *entity)
4166 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4167 ir_visibility visibility = ir_visibility_external;
4168 storage_class_tag_t storage
4169 = (storage_class_tag_t)entity->declaration.storage_class;
4170 decl_modifiers_t modifiers = entity->declaration.modifiers;
4171 assert(entity->kind == ENTITY_VARIABLE);
4174 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4175 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4176 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4177 case STORAGE_CLASS_TYPEDEF:
4178 case STORAGE_CLASS_AUTO:
4179 case STORAGE_CLASS_REGISTER:
4180 panic("invalid storage class for global var");
4183 /* "common" symbols */
4184 if (storage == STORAGE_CLASS_NONE
4185 && entity->variable.initializer == NULL
4186 && !entity->variable.thread_local
4187 && (modifiers & DM_WEAK) == 0) {
4188 linkage |= IR_LINKAGE_MERGE;
4191 ir_type *var_type = get_glob_type();
4192 if (entity->variable.thread_local) {
4193 var_type = get_tls_type();
4195 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4196 ir_entity *irentity = entity->variable.v.entity;
4197 add_entity_linkage(irentity, linkage);
4198 set_entity_visibility(irentity, visibility);
4199 if (entity->variable.initializer == NULL
4200 && storage != STORAGE_CLASS_EXTERN) {
4201 ir_initializer_t *null_init = get_initializer_null();
4202 set_entity_initializer(irentity, null_init);
4206 static void create_local_declaration(entity_t *entity)
4208 assert(is_declaration(entity));
4210 /* construct type */
4211 (void) get_ir_type(entity->declaration.type);
4212 if (entity->base.symbol == NULL) {
4216 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4217 case STORAGE_CLASS_STATIC:
4218 if (entity->kind == ENTITY_FUNCTION) {
4219 (void)get_function_entity(entity, NULL);
4221 create_local_static_variable(entity);
4224 case STORAGE_CLASS_EXTERN:
4225 if (entity->kind == ENTITY_FUNCTION) {
4226 assert(entity->function.body == NULL);
4227 (void)get_function_entity(entity, NULL);
4229 create_global_variable(entity);
4230 create_variable_initializer(entity);
4233 case STORAGE_CLASS_NONE:
4234 case STORAGE_CLASS_AUTO:
4235 case STORAGE_CLASS_REGISTER:
4236 if (entity->kind == ENTITY_FUNCTION) {
4237 if (entity->function.body != NULL) {
4238 ir_type *owner = get_irg_frame_type(current_ir_graph);
4239 (void)get_function_entity(entity, owner);
4240 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4241 enqueue_inner_function(entity);
4243 (void)get_function_entity(entity, NULL);
4246 create_local_variable(entity);
4249 case STORAGE_CLASS_TYPEDEF:
4252 panic("invalid storage class");
4255 static void create_local_declarations(entity_t *e)
4257 for (; e; e = e->base.next) {
4258 if (is_declaration(e))
4259 create_local_declaration(e);
4263 static void initialize_local_declaration(entity_t *entity)
4265 if (entity->base.symbol == NULL)
4268 // no need to emit code in dead blocks
4269 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4270 && !currently_reachable())
4273 switch ((declaration_kind_t) entity->declaration.kind) {
4274 case DECLARATION_KIND_LOCAL_VARIABLE:
4275 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4276 create_variable_initializer(entity);
4279 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4280 allocate_variable_length_array(entity);
4283 case DECLARATION_KIND_COMPOUND_MEMBER:
4284 case DECLARATION_KIND_GLOBAL_VARIABLE:
4285 case DECLARATION_KIND_FUNCTION:
4286 case DECLARATION_KIND_INNER_FUNCTION:
4289 case DECLARATION_KIND_PARAMETER:
4290 case DECLARATION_KIND_PARAMETER_ENTITY:
4291 panic("can't initialize parameters");
4293 case DECLARATION_KIND_UNKNOWN:
4294 panic("can't initialize unknown declaration");
4296 panic("invalid declaration kind");
4299 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4301 entity_t *entity = statement->declarations_begin;
4305 entity_t *const last = statement->declarations_end;
4306 for ( ;; entity = entity->base.next) {
4307 if (is_declaration(entity)) {
4308 initialize_local_declaration(entity);
4309 } else if (entity->kind == ENTITY_TYPEDEF) {
4310 /* ยง6.7.7:3 Any array size expressions associated with variable length
4311 * array declarators are evaluated each time the declaration of the
4312 * typedef name is reached in the order of execution. */
4313 type_t *const type = skip_typeref(entity->typedefe.type);
4314 if (is_type_array(type) && type->array.is_vla)
4315 get_vla_size(&type->array);
4324 static ir_node *if_statement_to_firm(if_statement_t *statement)
4326 create_local_declarations(statement->scope.entities);
4328 /* Create the condition. */
4329 jump_target true_target;
4330 jump_target false_target;
4331 init_jump_target(&true_target, NULL);
4332 init_jump_target(&false_target, NULL);
4333 if (currently_reachable())
4334 expression_to_control_flow(statement->condition, &true_target, &false_target);
4336 jump_target exit_target;
4337 init_jump_target(&exit_target, NULL);
4339 /* Create the true statement. */
4340 enter_jump_target(&true_target);
4341 statement_to_firm(statement->true_statement);
4342 jump_to_target(&exit_target);
4344 /* Create the false statement. */
4345 enter_jump_target(&false_target);
4346 if (statement->false_statement)
4347 statement_to_firm(statement->false_statement);
4348 jump_to_target(&exit_target);
4350 enter_jump_target(&exit_target);
4354 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4356 create_local_declarations(statement->scope.entities);
4359 PUSH_CONTINUE(NULL);
4361 expression_t *const cond = statement->condition;
4362 /* Avoid an explicit body block in case of do ... while (0);. */
4363 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4364 /* do ... while (0);. */
4365 statement_to_firm(statement->body);
4366 jump_to_target(&continue_target);
4367 enter_jump_target(&continue_target);
4368 jump_to_target(&break_target);
4370 jump_target body_target;
4371 init_jump_target(&body_target, NULL);
4372 jump_to_target(&body_target);
4373 enter_immature_jump_target(&body_target);
4375 statement_to_firm(statement->body);
4376 jump_to_target(&continue_target);
4377 if (enter_jump_target(&continue_target))
4378 expression_to_control_flow(statement->condition, &body_target, &break_target);
4379 enter_jump_target(&body_target);
4381 enter_jump_target(&break_target);
4388 static ir_node *for_statement_to_firm(for_statement_t *statement)
4390 create_local_declarations(statement->scope.entities);
4392 if (currently_reachable()) {
4393 entity_t *entity = statement->scope.entities;
4394 for ( ; entity != NULL; entity = entity->base.next) {
4395 if (!is_declaration(entity))
4398 initialize_local_declaration(entity);
4401 if (statement->initialisation != NULL) {
4402 expression_to_value(statement->initialisation);
4406 /* Create the header block */
4407 jump_target header_target;
4408 init_jump_target(&header_target, NULL);
4409 jump_to_target(&header_target);
4410 enter_immature_jump_target(&header_target);
4413 expression_t *const step = statement->step;
4415 PUSH_CONTINUE(step ? NULL : header_target.block);
4417 /* Create the condition. */
4418 expression_t *const cond = statement->condition;
4419 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4420 jump_target body_target;
4421 init_jump_target(&body_target, NULL);
4422 expression_to_control_flow(cond, &body_target, &break_target);
4423 enter_jump_target(&body_target);
4426 /* Create the loop body. */
4427 statement_to_firm(statement->body);
4428 jump_to_target(&continue_target);
4430 /* Create the step code. */
4431 if (step && enter_jump_target(&continue_target)) {
4432 expression_to_value(step);
4433 jump_to_target(&header_target);
4436 enter_jump_target(&header_target);
4437 enter_jump_target(&break_target);
4444 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4446 /* determine number of cases */
4448 for (case_label_statement_t *l = statement->first_case; l != NULL;
4451 if (l->expression == NULL)
4453 if (l->is_empty_range)
4458 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4460 for (case_label_statement_t *l = statement->first_case; l != NULL;
4462 if (l->expression == NULL) {
4463 l->pn = pn_Switch_default;
4466 if (l->is_empty_range)
4468 ir_tarval *min = l->first_case;
4469 ir_tarval *max = l->last_case;
4470 long pn = (long) i+1;
4471 ir_switch_table_set(res, i++, min, max, pn);
4477 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4479 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4480 ir_node *switch_node = NULL;
4482 if (currently_reachable()) {
4483 ir_node *expression = expression_to_value(statement->expression);
4484 ir_switch_table *table = create_switch_table(statement);
4485 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4487 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4490 set_unreachable_now();
4493 ir_node *const old_switch = current_switch;
4494 const bool old_saw_default_label = saw_default_label;
4495 saw_default_label = false;
4496 current_switch = switch_node;
4498 statement_to_firm(statement->body);
4499 jump_to_target(&break_target);
4501 if (!saw_default_label && switch_node) {
4502 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4503 add_pred_to_jump_target(&break_target, proj);
4506 enter_jump_target(&break_target);
4508 assert(current_switch == switch_node);
4509 current_switch = old_switch;
4510 saw_default_label = old_saw_default_label;
4515 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4517 if (current_switch != NULL && !statement->is_empty_range) {
4518 jump_target case_target;
4519 init_jump_target(&case_target, NULL);
4521 /* Fallthrough from previous case */
4522 jump_to_target(&case_target);
4524 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4525 add_pred_to_jump_target(&case_target, proj);
4526 if (statement->expression == NULL)
4527 saw_default_label = true;
4529 enter_jump_target(&case_target);
4532 return statement_to_firm(statement->statement);
4535 static ir_node *label_to_firm(const label_statement_t *statement)
4537 label_t *const label = statement->label;
4538 prepare_label_target(label);
4539 jump_to_target(&label->target);
4540 if (--label->n_users == 0) {
4541 enter_jump_target(&label->target);
4543 enter_immature_jump_target(&label->target);
4547 return statement_to_firm(statement->statement);
4550 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4552 label_t *const label = stmt->label;
4553 prepare_label_target(label);
4554 jump_to_target(&label->target);
4555 if (--label->n_users == 0)
4556 enter_jump_target(&label->target);
4557 set_unreachable_now();
4561 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4563 if (currently_reachable()) {
4564 ir_node *const op = expression_to_value(statement->expression);
4565 ARR_APP1(ir_node*, ijmp_ops, op);
4566 jump_to_target(&ijmp_target);
4567 set_unreachable_now();
4572 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4574 bool needs_memory = statement->is_volatile;
4575 size_t n_clobbers = 0;
4576 asm_clobber_t *clobber = statement->clobbers;
4577 for ( ; clobber != NULL; clobber = clobber->next) {
4578 const char *clobber_str = clobber->clobber.begin;
4580 if (!be_is_valid_clobber(clobber_str)) {
4581 errorf(&statement->base.pos,
4582 "invalid clobber '%s' specified", clobber->clobber);
4586 if (streq(clobber_str, "memory")) {
4587 needs_memory = true;
4591 ident *id = new_id_from_str(clobber_str);
4592 obstack_ptr_grow(&asm_obst, id);
4595 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4596 ident **clobbers = NULL;
4597 if (n_clobbers > 0) {
4598 clobbers = obstack_finish(&asm_obst);
4601 size_t n_inputs = 0;
4602 asm_argument_t *argument = statement->inputs;
4603 for ( ; argument != NULL; argument = argument->next)
4605 size_t n_outputs = 0;
4606 argument = statement->outputs;
4607 for ( ; argument != NULL; argument = argument->next)
4610 unsigned next_pos = 0;
4612 ir_node *ins[n_inputs + n_outputs + 1];
4615 ir_asm_constraint tmp_in_constraints[n_outputs];
4617 const expression_t *out_exprs[n_outputs];
4618 ir_node *out_addrs[n_outputs];
4619 size_t out_size = 0;
4621 argument = statement->outputs;
4622 for ( ; argument != NULL; argument = argument->next) {
4623 const char *constraints = argument->constraints.begin;
4624 asm_constraint_flags_t asm_flags
4625 = be_parse_asm_constraints(constraints);
4628 position_t const *const pos = &statement->base.pos;
4629 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4630 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4632 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4633 errorf(pos, "some constraints in '%s' are invalid", constraints);
4636 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4637 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4642 unsigned pos = next_pos++;
4643 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4644 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4645 expression_t *expr = argument->expression;
4646 ir_node *addr = expression_to_addr(expr);
4647 /* in+output, construct an artifical same_as constraint on the
4649 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4651 ir_node *value = get_value_from_lvalue(expr, addr);
4653 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4655 ir_asm_constraint constraint;
4656 constraint.pos = pos;
4657 constraint.constraint = new_id_from_str(buf);
4658 constraint.mode = get_ir_mode_storage(expr->base.type);
4659 tmp_in_constraints[in_size] = constraint;
4660 ins[in_size] = value;
4665 out_exprs[out_size] = expr;
4666 out_addrs[out_size] = addr;
4668 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4669 /* pure memory ops need no input (but we have to make sure we
4670 * attach to the memory) */
4671 assert(! (asm_flags &
4672 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4673 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4674 needs_memory = true;
4676 /* we need to attach the address to the inputs */
4677 expression_t *expr = argument->expression;
4679 ir_asm_constraint constraint;
4680 constraint.pos = pos;
4681 constraint.constraint = new_id_from_str(constraints);
4682 constraint.mode = mode_M;
4683 tmp_in_constraints[in_size] = constraint;
4685 ins[in_size] = expression_to_addr(expr);
4689 errorf(&statement->base.pos,
4690 "only modifiers but no place set in constraints '%s'",
4695 ir_asm_constraint constraint;
4696 constraint.pos = pos;
4697 constraint.constraint = new_id_from_str(constraints);
4698 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4700 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4702 assert(obstack_object_size(&asm_obst)
4703 == out_size * sizeof(ir_asm_constraint));
4704 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4707 obstack_grow(&asm_obst, tmp_in_constraints,
4708 in_size * sizeof(tmp_in_constraints[0]));
4709 /* find and count input and output arguments */
4710 argument = statement->inputs;
4711 for ( ; argument != NULL; argument = argument->next) {
4712 const char *constraints = argument->constraints.begin;
4713 asm_constraint_flags_t asm_flags
4714 = be_parse_asm_constraints(constraints);
4716 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4717 errorf(&statement->base.pos,
4718 "some constraints in '%s' are not supported", constraints);
4721 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4722 errorf(&statement->base.pos,
4723 "some constraints in '%s' are invalid", constraints);
4726 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4727 errorf(&statement->base.pos,
4728 "write flag specified for input constraints '%s'",
4734 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4735 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4736 /* we can treat this as "normal" input */
4737 input = expression_to_value(argument->expression);
4738 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4739 /* pure memory ops need no input (but we have to make sure we
4740 * attach to the memory) */
4741 assert(! (asm_flags &
4742 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4743 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4744 needs_memory = true;
4745 input = expression_to_addr(argument->expression);
4747 errorf(&statement->base.pos,
4748 "only modifiers but no place set in constraints '%s'",
4753 ir_asm_constraint constraint;
4754 constraint.pos = next_pos++;
4755 constraint.constraint = new_id_from_str(constraints);
4756 constraint.mode = get_irn_mode(input);
4758 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4759 ins[in_size++] = input;
4762 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4763 assert(obstack_object_size(&asm_obst)
4764 == in_size * sizeof(ir_asm_constraint));
4765 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4767 /* create asm node */
4768 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4770 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4772 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4773 out_size, output_constraints,
4774 n_clobbers, clobbers, asm_text);
4776 if (statement->is_volatile) {
4777 set_irn_pinned(node, op_pin_state_pinned);
4779 set_irn_pinned(node, op_pin_state_floats);
4782 /* create output projs & connect them */
4784 ir_node *projm = new_Proj(node, mode_M, out_size);
4789 for (i = 0; i < out_size; ++i) {
4790 const expression_t *out_expr = out_exprs[i];
4792 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
4793 ir_node *proj = new_Proj(node, mode, pn);
4794 ir_node *addr = out_addrs[i];
4796 set_value_for_expression_addr(out_expr, proj, addr);
4802 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4804 statement_to_firm(statement->try_statement);
4805 position_t const *const pos = &statement->base.pos;
4806 warningf(WARN_OTHER, pos, "structured exception handling ignored");
4810 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4812 errorf(&statement->base.pos, "__leave not supported yet");
4817 * Transform a statement.
4819 static ir_node *statement_to_firm(statement_t *const stmt)
4822 assert(!stmt->base.transformed);
4823 stmt->base.transformed = true;
4826 switch (stmt->kind) {
4827 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
4828 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
4829 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
4830 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
4831 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
4832 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
4833 case STATEMENT_EMPTY: return NULL; /* nothing */
4834 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
4835 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
4836 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
4837 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
4838 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
4839 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
4840 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
4841 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
4842 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
4846 case STATEMENT_BREAK: tgt = &break_target; goto jump;
4847 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
4849 jump_to_target(tgt);
4850 set_unreachable_now();
4854 case STATEMENT_ERROR: panic("error statement");
4856 panic("statement not implemented");
4859 static int count_local_variables(const entity_t *entity,
4860 const entity_t *const last)
4863 entity_t const *const end = last != NULL ? last->base.next : NULL;
4864 for (; entity != end; entity = entity->base.next) {
4865 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
4866 !var_needs_entity(&entity->variable))
4872 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
4874 int *const count = env;
4876 switch (stmt->kind) {
4877 case STATEMENT_DECLARATION: {
4878 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4879 *count += count_local_variables(decl_stmt->declarations_begin,
4880 decl_stmt->declarations_end);
4885 *count += count_local_variables(stmt->fors.scope.entities, NULL);
4894 * Return the number of local (alias free) variables used by a function.
4896 static int get_function_n_local_vars(entity_t *entity)
4898 const function_t *function = &entity->function;
4901 /* count parameters */
4902 count += count_local_variables(function->parameters.entities, NULL);
4904 /* count local variables declared in body */
4905 walk_statements(function->body, count_local_variables_in_stmt, &count);
4910 * Build Firm code for the parameters of a function.
4912 static void initialize_function_parameters(entity_t *entity)
4914 assert(entity->kind == ENTITY_FUNCTION);
4915 ir_graph *irg = current_ir_graph;
4916 ir_node *args = get_irg_args(irg);
4918 ir_type *function_irtype;
4920 if (entity->function.need_closure) {
4921 /* add an extra parameter for the static link */
4922 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
4925 /* Matze: IMO this is wrong, nested functions should have an own
4926 * type and not rely on strange parameters... */
4927 function_irtype = create_method_type(&entity->declaration.type->function, true);
4929 function_irtype = get_ir_type(entity->declaration.type);
4934 entity_t *parameter = entity->function.parameters.entities;
4935 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
4936 if (parameter->kind != ENTITY_PARAMETER)
4939 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
4940 type_t *type = skip_typeref(parameter->declaration.type);
4942 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
4943 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
4944 if (var_needs_entity(¶meter->variable)) {
4945 ir_type *frame_type = get_irg_frame_type(irg);
4947 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
4948 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
4949 parameter->variable.v.entity = param;
4953 ir_mode *param_mode = get_type_mode(param_irtype);
4955 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
4956 value = conv_to_storage_type(dbgi, value, type);
4958 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
4959 parameter->variable.v.value_number = next_value_number_function;
4960 set_irg_loc_description(current_ir_graph, next_value_number_function,
4962 ++next_value_number_function;
4964 set_value(parameter->variable.v.value_number, value);
4968 static void add_function_pointer(ir_type *segment, ir_entity *method,
4969 const char *unique_template)
4971 ir_type *method_type = get_entity_type(method);
4972 ir_type *ptr_type = new_type_pointer(method_type);
4974 /* these entities don't really have a name but firm only allows
4976 * Note that we mustn't give these entities a name since for example
4977 * Mach-O doesn't allow them. */
4978 ident *ide = id_unique(unique_template);
4979 ir_entity *ptr = new_entity(segment, ide, ptr_type);
4980 ir_graph *irg = get_const_code_irg();
4981 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
4984 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
4985 set_entity_compiler_generated(ptr, 1);
4986 set_entity_visibility(ptr, ir_visibility_private);
4987 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
4988 set_atomic_ent_value(ptr, val);
4992 * Create code for a function and all inner functions.
4994 * @param entity the function entity
4996 static void create_function(entity_t *entity)
4998 assert(entity->kind == ENTITY_FUNCTION);
4999 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5001 if (entity->function.body == NULL)
5004 inner_functions = NULL;
5005 current_trampolines = NULL;
5007 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5008 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5009 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5011 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5012 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5013 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5016 current_function_entity = entity;
5017 current_function_name = NULL;
5018 current_funcsig = NULL;
5021 assert(!ijmp_blocks);
5022 init_jump_target(&ijmp_target, NULL);
5023 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5024 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5026 int n_local_vars = get_function_n_local_vars(entity);
5027 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5028 current_ir_graph = irg;
5030 ir_graph *old_current_function = current_function;
5031 current_function = irg;
5033 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5034 current_vararg_entity = NULL;
5036 set_irg_fp_model(irg, firm_fp_model);
5037 set_irn_dbg_info(get_irg_start_block(irg),
5038 get_entity_dbg_info(function_entity));
5040 next_value_number_function = 0;
5041 initialize_function_parameters(entity);
5042 current_static_link = entity->function.static_link;
5044 statement_to_firm(entity->function.body);
5046 ir_node *end_block = get_irg_end_block(irg);
5048 /* do we have a return statement yet? */
5049 if (currently_reachable()) {
5050 type_t *type = skip_typeref(entity->declaration.type);
5051 assert(is_type_function(type));
5052 type_t *const return_type = skip_typeref(type->function.return_type);
5055 if (is_type_void(return_type)) {
5056 ret = new_Return(get_store(), 0, NULL);
5058 ir_mode *const mode = get_ir_mode_storage(return_type);
5061 /* ยง5.1.2.2.3 main implicitly returns 0 */
5062 if (is_main(entity)) {
5063 in[0] = new_Const(get_mode_null(mode));
5065 in[0] = new_Unknown(mode);
5067 ret = new_Return(get_store(), 1, in);
5069 add_immBlock_pred(end_block, ret);
5072 if (enter_jump_target(&ijmp_target)) {
5074 size_t const n = ARR_LEN(ijmp_ops);
5075 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5076 ir_node *const ijmp = new_IJmp(op);
5077 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5078 ir_node *const block = ijmp_blocks[i];
5079 add_immBlock_pred(block, ijmp);
5080 mature_immBlock(block);
5084 DEL_ARR_F(ijmp_ops);
5085 DEL_ARR_F(ijmp_blocks);
5089 irg_finalize_cons(irg);
5091 /* finalize the frame type */
5092 ir_type *frame_type = get_irg_frame_type(irg);
5093 int n = get_compound_n_members(frame_type);
5096 for (int i = 0; i < n; ++i) {
5097 ir_entity *member = get_compound_member(frame_type, i);
5098 ir_type *entity_type = get_entity_type(member);
5100 int align = get_type_alignment_bytes(entity_type);
5101 if (align > align_all)
5105 misalign = offset % align;
5107 offset += align - misalign;
5111 set_entity_offset(member, offset);
5112 offset += get_type_size_bytes(entity_type);
5114 set_type_size_bytes(frame_type, offset);
5115 set_type_alignment_bytes(frame_type, align_all);
5117 irg_verify(irg, VERIFY_ENFORCE_SSA);
5118 current_vararg_entity = old_current_vararg_entity;
5119 current_function = old_current_function;
5121 if (current_trampolines != NULL) {
5122 DEL_ARR_F(current_trampolines);
5123 current_trampolines = NULL;
5126 /* create inner functions if any */
5127 entity_t **inner = inner_functions;
5128 if (inner != NULL) {
5129 ir_type *rem_outer_frame = current_outer_frame;
5130 current_outer_frame = get_irg_frame_type(current_ir_graph);
5131 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5132 create_function(inner[i]);
5136 current_outer_frame = rem_outer_frame;
5140 static void scope_to_firm(scope_t *scope)
5142 /* first pass: create declarations */
5143 entity_t *entity = scope->entities;
5144 for ( ; entity != NULL; entity = entity->base.next) {
5145 if (entity->base.symbol == NULL)
5148 if (entity->kind == ENTITY_FUNCTION) {
5149 if (entity->function.btk != BUILTIN_NONE) {
5150 /* builtins have no representation */
5153 (void)get_function_entity(entity, NULL);
5154 } else if (entity->kind == ENTITY_VARIABLE) {
5155 create_global_variable(entity);
5156 } else if (entity->kind == ENTITY_NAMESPACE) {
5157 scope_to_firm(&entity->namespacee.members);
5161 /* second pass: create code/initializers */
5162 entity = scope->entities;
5163 for ( ; entity != NULL; entity = entity->base.next) {
5164 if (entity->base.symbol == NULL)
5167 if (entity->kind == ENTITY_FUNCTION) {
5168 if (entity->function.btk != BUILTIN_NONE) {
5169 /* builtins have no representation */
5172 create_function(entity);
5173 } else if (entity->kind == ENTITY_VARIABLE) {
5174 assert(entity->declaration.kind
5175 == DECLARATION_KIND_GLOBAL_VARIABLE);
5176 current_ir_graph = get_const_code_irg();
5177 create_variable_initializer(entity);
5182 void init_ast2firm(void)
5184 obstack_init(&asm_obst);
5185 init_atomic_modes();
5187 ir_set_debug_retrieve(dbg_retrieve);
5188 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5190 /* create idents for all known runtime functions */
5191 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5192 rts_idents[i] = new_id_from_str(rts_data[i].name);
5195 entitymap_init(&entitymap);
5198 static void init_ir_types(void)
5200 static int ir_types_initialized = 0;
5201 if (ir_types_initialized)
5203 ir_types_initialized = 1;
5205 ir_type_char = get_ir_type(type_char);
5207 be_params = be_get_backend_param();
5208 mode_float_arithmetic = be_params->mode_float_arithmetic;
5210 stack_param_align = be_params->stack_param_align;
5213 void exit_ast2firm(void)
5215 entitymap_destroy(&entitymap);
5216 obstack_free(&asm_obst, NULL);
5219 static void global_asm_to_firm(statement_t *s)
5221 for (; s != NULL; s = s->base.next) {
5222 assert(s->kind == STATEMENT_ASM);
5224 char const *const text = s->asms.asm_text.begin;
5225 size_t const size = s->asms.asm_text.size;
5226 ident *const id = new_id_from_chars(text, size);
5231 static const char *get_cwd(void)
5233 static char buf[1024];
5234 if (buf[0] == '\0') {
5235 return getcwd(buf, sizeof(buf));
5240 void translation_unit_to_firm(translation_unit_t *unit)
5242 if (c_mode & _CXX) {
5243 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5244 } else if (c_mode & _C99) {
5245 be_dwarf_set_source_language(DW_LANG_C99);
5246 } else if (c_mode & _C89) {
5247 be_dwarf_set_source_language(DW_LANG_C89);
5249 be_dwarf_set_source_language(DW_LANG_C);
5251 const char *cwd = get_cwd();
5253 be_dwarf_set_compilation_directory(cwd);
5256 /* initialize firm arithmetic */
5257 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5258 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5260 /* just to be sure */
5261 init_jump_target(&break_target, NULL);
5262 init_jump_target(&continue_target, NULL);
5263 current_switch = NULL;
5264 current_translation_unit = unit;
5268 scope_to_firm(&unit->scope);
5269 global_asm_to_firm(unit->global_asm);
5271 current_ir_graph = NULL;
5272 current_translation_unit = NULL;