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_firm(const expression_t *expression);
197 static ir_node *expression_to_firm(const expression_t *expression);
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_firm(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)
772 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
773 type = skip_typeref(type);
775 if (is_type_array(type) && type->array.is_vla) {
776 ir_node *size_node = get_vla_size(&type->array);
777 ir_node *elem_size = get_type_size_node(type->array.element_type);
778 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
782 size = get_type_size(type);
783 return new_Const_long(mode, size);
786 /** Names of the runtime functions. */
787 static const struct {
788 int id; /**< the rts id */
789 int n_res; /**< number of return values */
790 const char *name; /**< the name of the rts function */
791 int n_params; /**< number of parameters */
792 unsigned flags; /**< language flags */
794 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
795 { rts_abort, 0, "abort", 0, _C89 },
796 { rts_alloca, 1, "alloca", 1, _ALL },
797 { rts_abs, 1, "abs", 1, _C89 },
798 { rts_labs, 1, "labs", 1, _C89 },
799 { rts_llabs, 1, "llabs", 1, _C99 },
800 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
802 { rts_fabs, 1, "fabs", 1, _C89 },
803 { rts_sqrt, 1, "sqrt", 1, _C89 },
804 { rts_cbrt, 1, "cbrt", 1, _C99 },
805 { rts_exp, 1, "exp", 1, _C89 },
806 { rts_exp2, 1, "exp2", 1, _C89 },
807 { rts_exp10, 1, "exp10", 1, _GNUC },
808 { rts_log, 1, "log", 1, _C89 },
809 { rts_log2, 1, "log2", 1, _C89 },
810 { rts_log10, 1, "log10", 1, _C89 },
811 { rts_pow, 1, "pow", 2, _C89 },
812 { rts_sin, 1, "sin", 1, _C89 },
813 { rts_cos, 1, "cos", 1, _C89 },
814 { rts_tan, 1, "tan", 1, _C89 },
815 { rts_asin, 1, "asin", 1, _C89 },
816 { rts_acos, 1, "acos", 1, _C89 },
817 { rts_atan, 1, "atan", 1, _C89 },
818 { rts_sinh, 1, "sinh", 1, _C89 },
819 { rts_cosh, 1, "cosh", 1, _C89 },
820 { rts_tanh, 1, "tanh", 1, _C89 },
822 { rts_fabsf, 1, "fabsf", 1, _C99 },
823 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
824 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
825 { rts_expf, 1, "expf", 1, _C99 },
826 { rts_exp2f, 1, "exp2f", 1, _C99 },
827 { rts_exp10f, 1, "exp10f", 1, _GNUC },
828 { rts_logf, 1, "logf", 1, _C99 },
829 { rts_log2f, 1, "log2f", 1, _C99 },
830 { rts_log10f, 1, "log10f", 1, _C99 },
831 { rts_powf, 1, "powf", 2, _C99 },
832 { rts_sinf, 1, "sinf", 1, _C99 },
833 { rts_cosf, 1, "cosf", 1, _C99 },
834 { rts_tanf, 1, "tanf", 1, _C99 },
835 { rts_asinf, 1, "asinf", 1, _C99 },
836 { rts_acosf, 1, "acosf", 1, _C99 },
837 { rts_atanf, 1, "atanf", 1, _C99 },
838 { rts_sinhf, 1, "sinhf", 1, _C99 },
839 { rts_coshf, 1, "coshf", 1, _C99 },
840 { rts_tanhf, 1, "tanhf", 1, _C99 },
842 { rts_fabsl, 1, "fabsl", 1, _C99 },
843 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
844 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
845 { rts_expl, 1, "expl", 1, _C99 },
846 { rts_exp2l, 1, "exp2l", 1, _C99 },
847 { rts_exp10l, 1, "exp10l", 1, _GNUC },
848 { rts_logl, 1, "logl", 1, _C99 },
849 { rts_log2l, 1, "log2l", 1, _C99 },
850 { rts_log10l, 1, "log10l", 1, _C99 },
851 { rts_powl, 1, "powl", 2, _C99 },
852 { rts_sinl, 1, "sinl", 1, _C99 },
853 { rts_cosl, 1, "cosl", 1, _C99 },
854 { rts_tanl, 1, "tanl", 1, _C99 },
855 { rts_asinl, 1, "asinl", 1, _C99 },
856 { rts_acosl, 1, "acosl", 1, _C99 },
857 { rts_atanl, 1, "atanl", 1, _C99 },
858 { rts_sinhl, 1, "sinhl", 1, _C99 },
859 { rts_coshl, 1, "coshl", 1, _C99 },
860 { rts_tanhl, 1, "tanhl", 1, _C99 },
862 { rts_strcmp, 1, "strcmp", 2, _C89 },
863 { rts_strncmp, 1, "strncmp", 3, _C89 },
864 { rts_strcpy, 1, "strcpy", 2, _C89 },
865 { rts_strlen, 1, "strlen", 1, _C89 },
866 { rts_memcpy, 1, "memcpy", 3, _C89 },
867 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
868 { rts_memmove, 1, "memmove", 3, _C89 },
869 { rts_memset, 1, "memset", 3, _C89 },
870 { rts_memcmp, 1, "memcmp", 3, _C89 },
873 static ident *rts_idents[lengthof(rts_data)];
875 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
877 void set_create_ld_ident(ident *(*func)(entity_t*))
879 create_ld_ident = func;
882 static bool declaration_is_definition(const entity_t *entity)
884 switch (entity->kind) {
885 case ENTITY_VARIABLE:
886 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
887 case ENTITY_FUNCTION:
888 return entity->function.body != NULL;
889 case ENTITY_PARAMETER:
890 case ENTITY_COMPOUND_MEMBER:
894 case ENTITY_ENUM_VALUE:
895 case ENTITY_NAMESPACE:
897 case ENTITY_LOCAL_LABEL:
900 panic("entity is not a declaration");
904 * Handle GNU attributes for entities
906 * @param ent the entity
907 * @param decl the routine declaration
909 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
911 assert(is_declaration(entity));
912 decl_modifiers_t modifiers = entity->declaration.modifiers;
914 if (is_method_entity(irentity)) {
915 if (modifiers & DM_PURE)
916 add_entity_additional_properties(irentity, mtp_property_pure);
917 if (modifiers & DM_CONST)
918 add_entity_additional_properties(irentity, mtp_property_const);
919 if (modifiers & DM_NOINLINE)
920 add_entity_additional_properties(irentity, mtp_property_noinline);
921 if (modifiers & DM_FORCEINLINE)
922 add_entity_additional_properties(irentity, mtp_property_always_inline);
923 if (modifiers & DM_NAKED)
924 add_entity_additional_properties(irentity, mtp_property_naked);
925 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
926 add_entity_additional_properties(irentity,
927 mtp_property_inline_recommended);
929 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
930 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
932 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
933 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
934 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
938 static bool is_main(entity_t *entity)
940 static symbol_t *sym_main = NULL;
941 if (sym_main == NULL) {
942 sym_main = symbol_table_insert("main");
945 if (entity->base.symbol != sym_main)
947 /* must be in outermost scope */
948 if (entity->base.parent_scope != ¤t_translation_unit->scope)
955 * Creates an entity representing a function.
957 * @param entity the function declaration/definition
958 * @param owner_type the owner type of this function, NULL
959 * for global functions
961 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
963 assert(entity->kind == ENTITY_FUNCTION);
964 if (entity->function.irentity != NULL)
965 return entity->function.irentity;
967 switch (entity->function.btk) {
970 case BUILTIN_LIBC_CHECK:
976 symbol_t *symbol = entity->base.symbol;
977 ident *id = new_id_from_str(symbol->string);
979 /* already an entity defined? */
980 ir_entity *irentity = entitymap_get(&entitymap, symbol);
981 bool const has_body = entity->function.body != NULL;
982 if (irentity != NULL) {
986 ir_type *ir_type_method;
987 if (entity->function.need_closure)
988 ir_type_method = create_method_type(&entity->declaration.type->function, true);
990 ir_type_method = get_ir_type(entity->declaration.type);
992 bool nested_function = false;
993 if (owner_type == NULL)
994 owner_type = get_glob_type();
996 nested_function = true;
998 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
999 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1002 if (nested_function)
1003 ld_id = id_unique("inner.%u");
1005 ld_id = create_ld_ident(entity);
1006 set_entity_ld_ident(irentity, ld_id);
1008 handle_decl_modifiers(irentity, entity);
1010 if (! nested_function) {
1011 storage_class_tag_t const storage_class
1012 = (storage_class_tag_t) entity->declaration.storage_class;
1013 if (storage_class == STORAGE_CLASS_STATIC) {
1014 set_entity_visibility(irentity, ir_visibility_local);
1016 set_entity_visibility(irentity, ir_visibility_external);
1019 bool const is_inline = entity->function.is_inline;
1020 if (is_inline && has_body) {
1021 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1022 || ((c_mode & _C99) == 0
1023 && storage_class == STORAGE_CLASS_EXTERN)) {
1024 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1028 /* nested functions are always local */
1029 set_entity_visibility(irentity, ir_visibility_local);
1032 /* We should check for file scope here, but as long as we compile C only
1033 this is not needed. */
1034 if (!freestanding && !has_body) {
1035 /* check for a known runtime function */
1036 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1037 if (id != rts_idents[i])
1040 function_type_t *function_type
1041 = &entity->declaration.type->function;
1042 /* rts_entities code can't handle a "wrong" number of parameters */
1043 if (function_type->unspecified_parameters)
1046 /* check number of parameters */
1047 int n_params = count_parameters(function_type);
1048 if (n_params != rts_data[i].n_params)
1051 type_t *return_type = skip_typeref(function_type->return_type);
1052 int n_res = is_type_void(return_type) ? 0 : 1;
1053 if (n_res != rts_data[i].n_res)
1056 /* ignore those rts functions not necessary needed for current mode */
1057 if ((c_mode & rts_data[i].flags) == 0)
1059 assert(rts_entities[rts_data[i].id] == NULL);
1060 rts_entities[rts_data[i].id] = irentity;
1064 entitymap_insert(&entitymap, symbol, irentity);
1067 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1068 entity->function.irentity = irentity;
1074 * Creates a SymConst for a given entity.
1076 * @param dbgi debug info
1077 * @param entity the entity
1079 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1081 assert(entity != NULL);
1082 union symconst_symbol sym;
1083 sym.entity_p = entity;
1084 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1087 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1089 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1092 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1095 if (is_Const(value)) {
1096 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1099 ir_node *cond = new_d_Cond(dbgi, value);
1100 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1101 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1102 ir_node *tblock = new_Block(1, &proj_true);
1103 ir_node *fblock = new_Block(1, &proj_false);
1104 set_cur_block(tblock);
1105 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1106 ir_node *tjump = new_Jmp();
1107 set_cur_block(fblock);
1108 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1109 ir_node *fjump = new_Jmp();
1111 ir_node *in[2] = { tjump, fjump };
1112 ir_node *mergeblock = new_Block(2, in);
1113 set_cur_block(mergeblock);
1114 ir_node *phi_in[2] = { const1, const0 };
1115 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1119 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1121 ir_mode *value_mode = get_irn_mode(value);
1123 if (value_mode == dest_mode)
1126 if (dest_mode == mode_b) {
1127 ir_node *zero = new_Const(get_mode_null(value_mode));
1128 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1130 } else if (value_mode == mode_b) {
1131 return create_conv_from_b(dbgi, value, dest_mode);
1134 return new_d_Conv(dbgi, value, dest_mode);
1137 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1139 ir_mode *const mode = get_ir_mode_storage(type);
1140 return create_conv(dbgi, val, mode);
1144 * Creates a SymConst node representing a string constant.
1146 * @param src_pos the source position of the string constant
1147 * @param id_prefix a prefix for the name of the generated string constant
1148 * @param value the value of the string constant
1150 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1152 size_t const slen = get_string_len(value) + 1;
1153 ir_initializer_t *const initializer = create_initializer_compound(slen);
1154 ir_type * elem_type;
1155 switch (value->encoding) {
1156 case STRING_ENCODING_CHAR:
1157 case STRING_ENCODING_UTF8: {
1158 elem_type = ir_type_char;
1160 ir_mode *const mode = get_type_mode(elem_type);
1161 char const *p = value->begin;
1162 for (size_t i = 0; i < slen; ++i) {
1163 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1164 ir_initializer_t *val = create_initializer_tarval(tv);
1165 set_initializer_compound_value(initializer, i, val);
1172 case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1173 case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1174 case STRING_ENCODING_WIDE: type = type_wchar_t; goto init_wide;
1176 elem_type = get_ir_type(type);
1178 ir_mode *const mode = get_type_mode(elem_type);
1179 char const *p = value->begin;
1180 for (size_t i = 0; i < slen; ++i) {
1181 assert(p <= value->begin + value->size);
1182 utf32 v = read_utf8_char(&p);
1183 ir_tarval *tv = new_tarval_from_long(v, mode);
1184 ir_initializer_t *val = create_initializer_tarval(tv);
1185 set_initializer_compound_value(initializer, i, val);
1190 panic("invalid string encoding");
1193 ir_type *const type = new_type_array(1, elem_type);
1194 set_array_bounds_int(type, 0, 0, slen);
1195 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1196 set_type_state( type, layout_fixed);
1198 ir_type *const global_type = get_glob_type();
1199 ident *const id = id_unique(id_prefix);
1200 dbg_info *const dbgi = get_dbg_info(src_pos);
1201 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1202 set_entity_ld_ident( entity, id);
1203 set_entity_visibility( entity, ir_visibility_private);
1204 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1205 set_entity_initializer(entity, initializer);
1207 return create_symconst(dbgi, entity);
1210 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1212 assert(type->kind == TYPE_ATOMIC);
1213 atomic_type_kind_t akind = type->atomic.akind;
1215 ir_mode *const mode = atomic_modes[akind];
1216 char const *const str = literal->value.begin;
1217 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1218 if (tv == tarval_bad)
1221 literal->base.type = type;
1222 literal->target_value = tv;
1226 void determine_literal_type(literal_expression_t *const literal)
1228 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1230 /* -1: signed only, 0: any, 1: unsigned only */
1232 !is_type_signed(literal->base.type) ? 1 :
1233 literal->value.begin[0] == '0' ? 0 :
1234 -1; /* Decimal literals only try signed types. */
1236 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1237 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1239 if (try_create_integer(literal, literal->base.type))
1242 /* now try if the constant is small enough for some types */
1243 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1245 if (sign <= 0 && try_create_integer(literal, type_long))
1247 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1249 /* last try? then we should not report tarval_bad */
1251 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1252 if (sign <= 0 && try_create_integer(literal, type_long_long))
1257 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1258 bool res = try_create_integer(literal, type_unsigned_long_long);
1260 panic("internal error when parsing number literal");
1263 tarval_set_integer_overflow_mode(old_mode);
1267 * Creates a Const node representing a constant.
1269 static ir_node *literal_to_firm(const literal_expression_t *literal)
1271 type_t *type = skip_typeref(literal->base.type);
1272 ir_mode *mode = get_ir_mode_storage(type);
1273 const char *string = literal->value.begin;
1274 size_t size = literal->value.size;
1277 switch (literal->base.kind) {
1278 case EXPR_LITERAL_INTEGER:
1279 assert(literal->target_value != NULL);
1280 tv = literal->target_value;
1283 case EXPR_LITERAL_FLOATINGPOINT:
1284 tv = new_tarval_from_str(string, size, mode);
1287 case EXPR_LITERAL_BOOLEAN:
1288 if (string[0] == 't') {
1289 tv = get_mode_one(mode);
1291 assert(string[0] == 'f');
1292 case EXPR_LITERAL_MS_NOOP:
1293 tv = get_mode_null(mode);
1298 panic("invalid literal kind");
1301 dbg_info *dbgi = get_dbg_info(&literal->base.pos);
1302 ir_node *res = new_d_Const(dbgi, tv);
1303 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1304 return create_conv(dbgi, res, mode_arith);
1308 * Creates a Const node representing a character constant.
1310 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1312 type_t *type = skip_typeref(literal->base.type);
1313 ir_mode *mode = get_ir_mode_storage(type);
1314 const char *string = literal->value.begin;
1315 size_t size = literal->value.size;
1318 switch (literal->value.encoding) {
1319 case STRING_ENCODING_WIDE: {
1320 utf32 v = read_utf8_char(&string);
1322 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1324 tv = new_tarval_from_str(buf, len, mode);
1328 case STRING_ENCODING_CHAR: {
1331 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1332 if (size == 1 && char_is_signed) {
1333 v = (signed char)string[0];
1336 for (size_t i = 0; i < size; ++i) {
1337 v = (v << 8) | ((unsigned char)string[i]);
1341 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1343 tv = new_tarval_from_str(buf, len, mode);
1348 panic("invalid literal kind");
1351 dbg_info *dbgi = get_dbg_info(&literal->base.pos);
1352 ir_node *res = new_d_Const(dbgi, tv);
1353 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1354 return create_conv(dbgi, res, mode_arith);
1358 * Allocate an area of size bytes aligned at alignment
1361 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1363 static unsigned area_cnt = 0;
1366 ir_type *tp = new_type_array(1, ir_type_char);
1367 set_array_bounds_int(tp, 0, 0, size);
1368 set_type_alignment_bytes(tp, alignment);
1370 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1371 ident *name = new_id_from_str(buf);
1372 ir_entity *area = new_entity(frame_type, name, tp);
1374 /* mark this entity as compiler generated */
1375 set_entity_compiler_generated(area, 1);
1380 * Return a node representing a trampoline region
1381 * for a given function entity.
1383 * @param dbgi debug info
1384 * @param entity the function entity
1386 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1388 ir_entity *region = NULL;
1391 if (current_trampolines != NULL) {
1392 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1393 if (current_trampolines[i].function == entity) {
1394 region = current_trampolines[i].region;
1399 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1401 ir_graph *irg = current_ir_graph;
1402 if (region == NULL) {
1403 /* create a new region */
1404 ir_type *frame_tp = get_irg_frame_type(irg);
1405 trampoline_region reg;
1406 reg.function = entity;
1408 reg.region = alloc_trampoline(frame_tp,
1409 be_params->trampoline_size,
1410 be_params->trampoline_align);
1411 ARR_APP1(trampoline_region, current_trampolines, reg);
1412 region = reg.region;
1414 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1419 * Creates a trampoline for a function represented by an entity.
1421 * @param dbgi debug info
1422 * @param mode the (reference) mode for the function address
1423 * @param entity the function entity
1425 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1428 assert(entity != NULL);
1430 in[0] = get_trampoline_region(dbgi, entity);
1431 in[1] = create_symconst(dbgi, entity);
1432 in[2] = get_irg_frame(current_ir_graph);
1434 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1435 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1436 return new_Proj(irn, mode, pn_Builtin_max+1);
1440 * Dereference an address.
1442 * @param dbgi debug info
1443 * @param type the type of the dereferenced result (the points_to type)
1444 * @param addr the address to dereference
1446 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1447 ir_node *const addr)
1449 type_t *skipped = skip_typeref(type);
1450 if (is_type_incomplete(skipped))
1453 ir_type *irtype = get_ir_type(skipped);
1454 if (is_compound_type(irtype)
1455 || is_Method_type(irtype)
1456 || is_Array_type(irtype)) {
1460 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1461 ? cons_volatile : cons_none;
1462 ir_mode *const mode = get_type_mode(irtype);
1463 ir_node *const memory = get_store();
1464 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1465 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1466 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1468 set_store(load_mem);
1470 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1471 return create_conv(dbgi, load_res, mode_arithmetic);
1475 * Returns the correct base address depending on whether it is a parameter or a
1476 * normal local variable.
1478 static ir_node *get_local_frame(ir_entity *const ent)
1480 ir_graph *const irg = current_ir_graph;
1481 const ir_type *const owner = get_entity_owner(ent);
1482 if (owner == current_outer_frame) {
1483 assert(current_static_link != NULL);
1484 return current_static_link;
1486 return get_irg_frame(irg);
1491 * Keep the current block and memory.
1492 * This is necessary for all loops, because they could become infinite.
1494 static void keep_loop(void)
1496 keep_alive(get_cur_block());
1497 keep_alive(get_store());
1500 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1502 entity_t *entity = ref->entity;
1503 if (entity->enum_value.tv == NULL) {
1504 type_t *type = skip_typeref(entity->enum_value.enum_type);
1505 assert(type->kind == TYPE_ENUM);
1506 determine_enum_values(&type->enumt);
1509 return new_Const(entity->enum_value.tv);
1512 static ir_node *reference_addr(const reference_expression_t *ref)
1514 dbg_info *dbgi = get_dbg_info(&ref->base.pos);
1515 entity_t *entity = ref->entity;
1516 assert(is_declaration(entity));
1518 if (entity->kind == ENTITY_FUNCTION
1519 && entity->function.btk != BUILTIN_NONE) {
1520 ir_entity *irentity = get_function_entity(entity, NULL);
1521 /* for gcc compatibility we have to produce (dummy) addresses for some
1522 * builtins which don't have entities */
1523 if (irentity == NULL) {
1524 position_t const *const pos = &ref->base.pos;
1525 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1527 /* simply create a NULL pointer */
1528 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1529 ir_node *res = new_Const(get_mode_null(mode));
1535 switch((declaration_kind_t) entity->declaration.kind) {
1536 case DECLARATION_KIND_UNKNOWN:
1538 case DECLARATION_KIND_PARAMETER:
1539 case DECLARATION_KIND_LOCAL_VARIABLE:
1540 /* you can store to a local variable (so we don't panic but return NULL
1541 * as an indicator for no real address) */
1543 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1544 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1548 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1549 case DECLARATION_KIND_PARAMETER_ENTITY: {
1550 ir_entity *irentity = entity->variable.v.entity;
1551 ir_node *frame = get_local_frame(irentity);
1552 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1556 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1557 return entity->variable.v.vla_base;
1559 case DECLARATION_KIND_FUNCTION: {
1560 return create_symconst(dbgi, entity->function.irentity);
1563 case DECLARATION_KIND_INNER_FUNCTION: {
1564 type_t *const type = skip_typeref(entity->declaration.type);
1565 ir_mode *const mode = get_ir_mode_storage(type);
1566 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1567 /* inner function not using the closure */
1568 return create_symconst(dbgi, entity->function.irentity);
1570 /* need trampoline here */
1571 return create_trampoline(dbgi, mode, entity->function.irentity);
1575 case DECLARATION_KIND_COMPOUND_MEMBER:
1576 panic("not implemented reference type");
1579 panic("reference to declaration with unknown type");
1582 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1584 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
1585 entity_t *const entity = ref->entity;
1586 assert(is_declaration(entity));
1588 switch ((declaration_kind_t)entity->declaration.kind) {
1589 case DECLARATION_KIND_LOCAL_VARIABLE:
1590 case DECLARATION_KIND_PARAMETER: {
1591 type_t *const type = skip_typeref(entity->declaration.type);
1592 ir_mode *const mode = get_ir_mode_storage(type);
1593 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1594 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1598 ir_node *const addr = reference_addr(ref);
1599 return deref_address(dbgi, entity->declaration.type, addr);
1605 * Transform calls to builtin functions.
1607 static ir_node *process_builtin_call(const call_expression_t *call)
1609 dbg_info *dbgi = get_dbg_info(&call->base.pos);
1611 assert(call->function->kind == EXPR_REFERENCE);
1612 reference_expression_t *builtin = &call->function->reference;
1614 type_t *expr_type = skip_typeref(builtin->base.type);
1615 assert(is_type_pointer(expr_type));
1617 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1619 switch (builtin->entity->function.btk) {
1622 case BUILTIN_ALLOCA: {
1623 expression_t *argument = call->arguments->expression;
1624 ir_node *size = expression_to_firm(argument);
1626 ir_node *store = get_store();
1627 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1629 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1631 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1636 type_t *type = function_type->function.return_type;
1637 ir_mode *mode = get_ir_mode_arithmetic(type);
1638 ir_tarval *tv = get_mode_infinite(mode);
1639 ir_node *res = new_d_Const(dbgi, tv);
1643 /* Ignore string for now... */
1644 assert(is_type_function(function_type));
1645 type_t *type = function_type->function.return_type;
1646 ir_mode *mode = get_ir_mode_arithmetic(type);
1647 ir_tarval *tv = get_mode_NAN(mode);
1648 ir_node *res = new_d_Const(dbgi, tv);
1651 case BUILTIN_EXPECT: {
1652 expression_t *argument = call->arguments->expression;
1653 return _expression_to_firm(argument);
1655 case BUILTIN_VA_END:
1656 /* evaluate the argument of va_end for its side effects */
1657 _expression_to_firm(call->arguments->expression);
1659 case BUILTIN_OBJECT_SIZE: {
1660 /* determine value of "type" */
1661 expression_t *type_expression = call->arguments->next->expression;
1662 long type_val = fold_constant_to_int(type_expression);
1663 type_t *type = function_type->function.return_type;
1664 ir_mode *mode = get_ir_mode_arithmetic(type);
1665 /* just produce a "I don't know" result */
1666 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1667 get_mode_minus_one(mode);
1669 return new_d_Const(dbgi, result);
1671 case BUILTIN_ROTL: {
1672 ir_node *val = expression_to_firm(call->arguments->expression);
1673 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1674 ir_mode *mode = get_irn_mode(val);
1675 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1676 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1678 case BUILTIN_ROTR: {
1679 ir_node *val = expression_to_firm(call->arguments->expression);
1680 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1681 ir_mode *mode = get_irn_mode(val);
1682 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1683 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1684 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1685 return new_d_Rotl(dbgi, val, sub, mode);
1690 case BUILTIN_LIBC_CHECK:
1691 panic("builtin did not produce an entity");
1693 panic("invalid builtin");
1697 * Transform a call expression.
1698 * Handles some special cases, like alloca() calls, which must be resolved
1699 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1700 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1703 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1705 dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1706 assert(currently_reachable());
1708 expression_t *function = call->function;
1709 ir_node *callee = NULL;
1710 bool firm_builtin = false;
1711 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1712 if (function->kind == EXPR_REFERENCE) {
1713 const reference_expression_t *ref = &function->reference;
1714 entity_t *entity = ref->entity;
1716 if (entity->kind == ENTITY_FUNCTION) {
1717 builtin_kind_t builtin = entity->function.btk;
1718 if (builtin == BUILTIN_FIRM) {
1719 firm_builtin = true;
1720 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1721 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1722 && builtin != BUILTIN_LIBC_CHECK) {
1723 return process_builtin_call(call);
1728 callee = expression_to_firm(function);
1730 type_t *type = skip_typeref(function->base.type);
1731 assert(is_type_pointer(type));
1732 pointer_type_t *pointer_type = &type->pointer;
1733 type_t *points_to = skip_typeref(pointer_type->points_to);
1734 assert(is_type_function(points_to));
1735 function_type_t *function_type = &points_to->function;
1737 int n_parameters = 0;
1738 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1739 ir_type *new_method_type = NULL;
1740 if (function_type->variadic || function_type->unspecified_parameters) {
1741 const call_argument_t *argument = call->arguments;
1742 for ( ; argument != NULL; argument = argument->next) {
1746 /* we need to construct a new method type matching the call
1748 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1749 int n_res = get_method_n_ress(ir_method_type);
1750 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1751 set_method_calling_convention(new_method_type,
1752 get_method_calling_convention(ir_method_type));
1753 set_method_additional_properties(new_method_type,
1754 get_method_additional_properties(ir_method_type));
1755 set_method_variadicity(new_method_type,
1756 get_method_variadicity(ir_method_type));
1758 for (int i = 0; i < n_res; ++i) {
1759 set_method_res_type(new_method_type, i,
1760 get_method_res_type(ir_method_type, i));
1762 argument = call->arguments;
1763 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1764 expression_t *expression = argument->expression;
1765 ir_type *irtype = get_ir_type(expression->base.type);
1766 set_method_param_type(new_method_type, i, irtype);
1768 ir_method_type = new_method_type;
1770 n_parameters = get_method_n_params(ir_method_type);
1773 ir_node *in[n_parameters];
1775 const call_argument_t *argument = call->arguments;
1776 for (int n = 0; n < n_parameters; ++n) {
1777 expression_t *expression = argument->expression;
1778 ir_node *arg_node = expression_to_firm(expression);
1779 type_t *arg_type = skip_typeref(expression->base.type);
1780 in[n] = conv_to_storage_type(dbgi, arg_node, arg_type);
1782 argument = argument->next;
1786 if (function_type->modifiers & DM_CONST) {
1787 store = get_irg_no_mem(current_ir_graph);
1789 store = get_store();
1793 type_t *return_type = skip_typeref(function_type->return_type);
1794 ir_node *result = NULL;
1796 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1798 if (! (function_type->modifiers & DM_CONST)) {
1799 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1803 if (!is_type_void(return_type)) {
1804 assert(is_type_scalar(return_type));
1805 ir_mode *mode = get_ir_mode_storage(return_type);
1806 result = new_Proj(node, mode, pn_Builtin_max+1);
1807 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1808 result = create_conv(NULL, result, mode_arith);
1811 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1812 if (! (function_type->modifiers & DM_CONST)) {
1813 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1817 if (!is_type_void(return_type)) {
1818 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1819 ir_mode *const mode = get_ir_mode_storage(return_type);
1820 result = new_Proj(resproj, mode, 0);
1821 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1822 result = create_conv(NULL, result, mode_arith);
1826 if (function_type->modifiers & DM_NORETURN) {
1827 /* A dead end: Keep the Call and the Block. Also place all further
1828 * nodes into a new and unreachable block. */
1830 keep_alive(get_cur_block());
1831 ir_node *block = new_Block(0, NULL);
1832 set_cur_block(block);
1838 static ir_node *statement_to_firm(statement_t *statement);
1839 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1841 static ir_node *expression_to_addr(const expression_t *expression);
1842 static ir_node *create_condition_evaluation(expression_t const *expression, jump_target *true_target, jump_target *false_target);
1844 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1847 value = conv_to_storage_type(dbgi, value, type);
1849 ir_node *memory = get_store();
1851 if (is_type_scalar(type)) {
1852 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1853 ? cons_volatile : cons_none;
1854 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1855 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1856 set_store(store_mem);
1858 ir_type *irtype = get_ir_type(type);
1859 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1860 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1861 set_store(copyb_mem);
1865 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1867 ir_tarval *all_one = get_mode_all_one(mode);
1868 int mode_size = get_mode_size_bits(mode);
1869 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1871 assert(offset >= 0);
1873 assert(offset + size <= mode_size);
1874 if (size == mode_size) {
1878 long shiftr = get_mode_size_bits(mode) - size;
1879 long shiftl = offset;
1880 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1881 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1882 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1883 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1888 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1889 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1892 ir_type *entity_type = get_entity_type(entity);
1893 ir_type *base_type = get_primitive_base_type(entity_type);
1894 ir_mode *mode = get_type_mode(base_type);
1895 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1897 value = create_conv(dbgi, value, mode);
1899 /* kill upper bits of value and shift to right position */
1900 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1901 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1902 unsigned base_bits = get_mode_size_bits(mode);
1903 unsigned shiftwidth = base_bits - bitsize;
1905 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1906 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1908 unsigned shrwidth = base_bits - bitsize - bitoffset;
1909 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1910 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1912 /* load current value */
1913 ir_node *mem = get_store();
1914 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1915 set_volatile ? cons_volatile : cons_none);
1916 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1917 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1918 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1919 ir_tarval *inv_mask = tarval_not(shift_mask);
1920 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1921 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1923 /* construct new value and store */
1924 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1925 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1926 set_volatile ? cons_volatile : cons_none);
1927 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1928 set_store(store_mem);
1934 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1935 if (mode_is_signed(mode)) {
1936 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1938 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1943 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1946 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1947 entity_t *entity = expression->compound_entry;
1948 type_t *base_type = entity->declaration.type;
1949 ir_mode *mode = get_ir_mode_storage(base_type);
1950 ir_node *mem = get_store();
1951 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1952 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1953 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1954 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1956 ir_mode *amode = mode;
1957 /* optimisation, since shifting in modes < machine_size is usually
1959 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1962 unsigned amode_size = get_mode_size_bits(amode);
1963 load_res = create_conv(dbgi, load_res, amode);
1965 set_store(load_mem);
1967 /* kill upper bits */
1968 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1969 unsigned bitoffset = entity->compound_member.bit_offset;
1970 unsigned bitsize = entity->compound_member.bit_size;
1971 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1972 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1973 ir_node *countl = new_d_Const(dbgi, tvl);
1974 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1976 unsigned shift_bitsr = bitoffset + shift_bitsl;
1977 assert(shift_bitsr <= amode_size);
1978 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1979 ir_node *countr = new_d_Const(dbgi, tvr);
1981 if (mode_is_signed(mode)) {
1982 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1984 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1987 type_t *type = expression->base.type;
1988 ir_mode *resmode = get_ir_mode_arithmetic(type);
1989 return create_conv(dbgi, shiftr, resmode);
1992 /* make sure the selected compound type is constructed */
1993 static void construct_select_compound(const select_expression_t *expression)
1995 type_t *type = skip_typeref(expression->compound->base.type);
1996 if (is_type_pointer(type)) {
1997 type = type->pointer.points_to;
1999 (void) get_ir_type(type);
2002 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2003 ir_node *value, ir_node *addr)
2005 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2006 type_t *type = skip_typeref(expression->base.type);
2007 value = conv_to_storage_type(dbgi, value, type);
2009 if (expression->kind == EXPR_REFERENCE) {
2010 const reference_expression_t *ref = &expression->reference;
2012 entity_t *entity = ref->entity;
2013 assert(is_declaration(entity));
2014 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2015 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2016 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2017 set_value(entity->variable.v.value_number, value);
2023 addr = expression_to_addr(expression);
2024 assert(addr != NULL);
2026 if (expression->kind == EXPR_SELECT) {
2027 const select_expression_t *select = &expression->select;
2029 construct_select_compound(select);
2031 entity_t *entity = select->compound_entry;
2032 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2033 if (entity->compound_member.bitfield) {
2034 ir_entity *irentity = entity->compound_member.entity;
2036 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2037 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2038 set_volatile, true);
2043 assign_value(dbgi, addr, type, value);
2047 static void set_value_for_expression(const expression_t *expression,
2050 set_value_for_expression_addr(expression, value, NULL);
2053 static ir_node *get_value_from_lvalue(const expression_t *expression,
2056 if (expression->kind == EXPR_REFERENCE) {
2057 const reference_expression_t *ref = &expression->reference;
2059 entity_t *entity = ref->entity;
2060 assert(entity->kind == ENTITY_VARIABLE
2061 || entity->kind == ENTITY_PARAMETER);
2062 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2064 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2065 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2066 value_number = entity->variable.v.value_number;
2067 assert(addr == NULL);
2068 type_t *type = skip_typeref(expression->base.type);
2069 ir_mode *mode = get_ir_mode_storage(type);
2070 ir_node *res = get_value(value_number, mode);
2071 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2075 assert(addr != NULL);
2076 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2079 if (expression->kind == EXPR_SELECT &&
2080 expression->select.compound_entry->compound_member.bitfield) {
2081 construct_select_compound(&expression->select);
2082 value = bitfield_extract_to_firm(&expression->select, addr);
2084 value = deref_address(dbgi, expression->base.type, addr);
2090 static ir_node *create_incdec(unary_expression_t const *const expr, bool const inc, bool const pre)
2092 type_t *const type = skip_typeref(expr->base.type);
2093 ir_mode *const mode = get_ir_mode_arithmetic(type);
2096 if (is_type_pointer(type)) {
2097 offset = get_type_size_node(type->pointer.points_to);
2099 assert(is_type_arithmetic(type));
2100 offset = new_Const(get_mode_one(mode));
2103 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2104 expression_t const *const value_expr = expr->value;
2105 ir_node *const addr = expression_to_addr(value_expr);
2106 ir_node *const value = get_value_from_lvalue(value_expr, addr);
2107 ir_node *const new_value = inc
2108 ? new_d_Add(dbgi, value, offset, mode)
2109 : new_d_Sub(dbgi, value, offset, mode);
2111 ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2112 return pre ? store_value : value;
2115 static bool is_local_variable(expression_t *expression)
2117 if (expression->kind != EXPR_REFERENCE)
2119 reference_expression_t *ref_expr = &expression->reference;
2120 entity_t *entity = ref_expr->entity;
2121 if (entity->kind != ENTITY_VARIABLE)
2123 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2124 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2127 static ir_relation get_relation(const expression_kind_t kind)
2130 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2131 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2132 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2133 case EXPR_BINARY_ISLESS:
2134 case EXPR_BINARY_LESS: return ir_relation_less;
2135 case EXPR_BINARY_ISLESSEQUAL:
2136 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2137 case EXPR_BINARY_ISGREATER:
2138 case EXPR_BINARY_GREATER: return ir_relation_greater;
2139 case EXPR_BINARY_ISGREATEREQUAL:
2140 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2141 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2146 panic("trying to get ir_relation from non-comparison binexpr type");
2150 * Handle the assume optimizer hint: check if a Confirm
2151 * node can be created.
2153 * @param dbi debug info
2154 * @param expr the IL assume expression
2156 * we support here only some simple cases:
2161 static ir_node *handle_assume_compare(dbg_info *dbi,
2162 const binary_expression_t *expression)
2164 expression_t *op1 = expression->left;
2165 expression_t *op2 = expression->right;
2166 entity_t *var2, *var = NULL;
2167 ir_node *res = NULL;
2168 ir_relation relation = get_relation(expression->base.kind);
2170 if (is_local_variable(op1) && is_local_variable(op2)) {
2171 var = op1->reference.entity;
2172 var2 = op2->reference.entity;
2174 type_t *const type = skip_typeref(var->declaration.type);
2175 ir_mode *const mode = get_ir_mode_storage(type);
2177 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2178 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2180 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2181 set_value(var2->variable.v.value_number, res);
2183 res = new_d_Confirm(dbi, irn1, irn2, relation);
2184 set_value(var->variable.v.value_number, res);
2189 expression_t *con = NULL;
2190 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2191 var = op1->reference.entity;
2193 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2194 relation = get_inversed_relation(relation);
2195 var = op2->reference.entity;
2200 type_t *const type = skip_typeref(var->declaration.type);
2201 ir_mode *const mode = get_ir_mode_storage(type);
2203 res = get_value(var->variable.v.value_number, mode);
2204 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2205 set_value(var->variable.v.value_number, res);
2211 * Handle the assume optimizer hint.
2213 * @param dbi debug info
2214 * @param expr the IL assume expression
2216 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2218 switch(expression->kind) {
2219 case EXPR_BINARY_EQUAL:
2220 case EXPR_BINARY_NOTEQUAL:
2221 case EXPR_BINARY_LESS:
2222 case EXPR_BINARY_LESSEQUAL:
2223 case EXPR_BINARY_GREATER:
2224 case EXPR_BINARY_GREATEREQUAL:
2225 return handle_assume_compare(dbi, &expression->binary);
2231 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2232 type_t *from_type, type_t *type)
2234 type = skip_typeref(type);
2235 if (is_type_void(type)) {
2236 /* make sure firm type is constructed */
2237 (void) get_ir_type(type);
2240 if (!is_type_scalar(type)) {
2241 /* make sure firm type is constructed */
2242 (void) get_ir_type(type);
2246 from_type = skip_typeref(from_type);
2247 ir_mode *mode = get_ir_mode_storage(type);
2248 /* check for conversion from / to __based types */
2249 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2250 const variable_t *from_var = from_type->pointer.base_variable;
2251 const variable_t *to_var = type->pointer.base_variable;
2252 if (from_var != to_var) {
2253 if (from_var != NULL) {
2254 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2255 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2256 value_node = new_d_Add(dbgi, value_node, base, mode);
2258 if (to_var != NULL) {
2259 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2260 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2261 value_node = new_d_Sub(dbgi, value_node, base, mode);
2266 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2267 /* bool adjustments (we save a mode_Bu, but have to temporarily
2268 * convert to mode_b so we only get a 0/1 value */
2269 value_node = create_conv(dbgi, value_node, mode_b);
2272 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2273 ir_node *node = create_conv(dbgi, value_node, mode);
2274 node = create_conv(dbgi, node, mode_arith);
2279 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2281 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2282 type_t *type = skip_typeref(expression->base.type);
2284 const expression_t *value = expression->value;
2286 switch(expression->base.kind) {
2287 case EXPR_UNARY_TAKE_ADDRESS:
2288 return expression_to_addr(value);
2290 case EXPR_UNARY_NEGATE: {
2291 ir_node *value_node = expression_to_firm(value);
2292 ir_mode *mode = get_ir_mode_arithmetic(type);
2293 return new_d_Minus(dbgi, value_node, mode);
2295 case EXPR_UNARY_PLUS:
2296 return expression_to_firm(value);
2297 case EXPR_UNARY_BITWISE_NEGATE: {
2298 ir_node *value_node = expression_to_firm(value);
2299 ir_mode *mode = get_ir_mode_arithmetic(type);
2300 return new_d_Not(dbgi, value_node, mode);
2302 case EXPR_UNARY_NOT: {
2303 ir_node *value_node = _expression_to_firm(value);
2304 value_node = create_conv(dbgi, value_node, mode_b);
2305 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2308 case EXPR_UNARY_DEREFERENCE: {
2309 ir_node *value_node = expression_to_firm(value);
2310 type_t *value_type = skip_typeref(value->base.type);
2311 assert(is_type_pointer(value_type));
2313 /* check for __based */
2314 const variable_t *const base_var = value_type->pointer.base_variable;
2315 if (base_var != NULL) {
2316 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2317 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2318 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2320 type_t *points_to = value_type->pointer.points_to;
2321 return deref_address(dbgi, points_to, value_node);
2327 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
2328 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
2329 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
2330 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
2332 return create_incdec(expression, inc, pre);
2335 case EXPR_UNARY_CAST: {
2336 ir_node *value_node = expression_to_firm(value);
2337 type_t *from_type = value->base.type;
2338 return create_cast(dbgi, value_node, from_type, type);
2340 case EXPR_UNARY_ASSUME:
2341 return handle_assume(dbgi, value);
2346 panic("invalid unary expression type");
2350 * produces a 0/1 depending of the value of a mode_b node
2352 static ir_node *produce_condition_result(const expression_t *expression,
2353 ir_mode *mode, dbg_info *dbgi)
2355 jump_target true_target;
2356 jump_target false_target;
2357 init_jump_target(&true_target, NULL);
2358 init_jump_target(&false_target, NULL);
2359 create_condition_evaluation(expression, &true_target, &false_target);
2361 ir_node *val = NULL;
2362 jump_target exit_target;
2363 init_jump_target(&exit_target, NULL);
2365 if (enter_jump_target(&true_target)) {
2366 val = new_Const(get_mode_one(mode));
2367 jump_to_target(&exit_target);
2370 if (enter_jump_target(&false_target)) {
2371 ir_node *const zero = new_Const(get_mode_null(mode));
2372 jump_to_target(&exit_target);
2374 ir_node *const in[] = { val, zero };
2375 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2381 if (!enter_jump_target(&exit_target)) {
2382 set_cur_block(new_Block(0, NULL));
2383 val = new_Unknown(mode);
2388 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2389 ir_node *value, type_t *type)
2391 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2392 assert(is_type_pointer(type));
2393 pointer_type_t *const pointer_type = &type->pointer;
2394 type_t *const points_to = skip_typeref(pointer_type->points_to);
2395 ir_node * elem_size = get_type_size_node(points_to);
2396 elem_size = create_conv(dbgi, elem_size, mode);
2397 value = create_conv(dbgi, value, mode);
2398 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2402 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2403 ir_node *left, ir_node *right)
2406 type_t *type_left = skip_typeref(expression->left->base.type);
2407 type_t *type_right = skip_typeref(expression->right->base.type);
2409 expression_kind_t kind = expression->base.kind;
2412 case EXPR_BINARY_SHIFTLEFT:
2413 case EXPR_BINARY_SHIFTRIGHT:
2414 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2415 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2416 mode = get_ir_mode_arithmetic(expression->base.type);
2417 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2420 case EXPR_BINARY_SUB:
2421 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2422 const pointer_type_t *const ptr_type = &type_left->pointer;
2424 mode = get_ir_mode_arithmetic(expression->base.type);
2425 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2426 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2427 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2428 ir_node *const no_mem = new_NoMem();
2429 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2430 mode, op_pin_state_floats);
2431 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2434 case EXPR_BINARY_SUB_ASSIGN:
2435 if (is_type_pointer(type_left)) {
2436 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2437 mode = get_ir_mode_arithmetic(type_left);
2442 case EXPR_BINARY_ADD:
2443 case EXPR_BINARY_ADD_ASSIGN:
2444 if (is_type_pointer(type_left)) {
2445 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2446 mode = get_ir_mode_arithmetic(type_left);
2448 } else if (is_type_pointer(type_right)) {
2449 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2450 mode = get_ir_mode_arithmetic(type_right);
2457 mode = get_ir_mode_arithmetic(type_right);
2458 left = create_conv(dbgi, left, mode);
2463 case EXPR_BINARY_ADD_ASSIGN:
2464 case EXPR_BINARY_ADD:
2465 return new_d_Add(dbgi, left, right, mode);
2466 case EXPR_BINARY_SUB_ASSIGN:
2467 case EXPR_BINARY_SUB:
2468 return new_d_Sub(dbgi, left, right, mode);
2469 case EXPR_BINARY_MUL_ASSIGN:
2470 case EXPR_BINARY_MUL:
2471 return new_d_Mul(dbgi, left, right, mode);
2472 case EXPR_BINARY_BITWISE_AND:
2473 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2474 return new_d_And(dbgi, left, right, mode);
2475 case EXPR_BINARY_BITWISE_OR:
2476 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2477 return new_d_Or(dbgi, left, right, mode);
2478 case EXPR_BINARY_BITWISE_XOR:
2479 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2480 return new_d_Eor(dbgi, left, right, mode);
2481 case EXPR_BINARY_SHIFTLEFT:
2482 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2483 return new_d_Shl(dbgi, left, right, mode);
2484 case EXPR_BINARY_SHIFTRIGHT:
2485 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2486 if (mode_is_signed(mode)) {
2487 return new_d_Shrs(dbgi, left, right, mode);
2489 return new_d_Shr(dbgi, left, right, mode);
2491 case EXPR_BINARY_DIV:
2492 case EXPR_BINARY_DIV_ASSIGN: {
2493 ir_node *pin = new_Pin(new_NoMem());
2494 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2495 op_pin_state_floats);
2496 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2499 case EXPR_BINARY_MOD:
2500 case EXPR_BINARY_MOD_ASSIGN: {
2501 ir_node *pin = new_Pin(new_NoMem());
2502 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2503 op_pin_state_floats);
2504 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2508 panic("unexpected expression kind");
2512 static ir_node *create_lazy_op(const binary_expression_t *expression)
2514 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2515 type_t *type = skip_typeref(expression->base.type);
2516 ir_mode *mode = get_ir_mode_arithmetic(type);
2518 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2519 bool val = fold_constant_to_bool(expression->left);
2520 expression_kind_t ekind = expression->base.kind;
2521 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2522 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2524 return new_Const(get_mode_null(mode));
2528 return new_Const(get_mode_one(mode));
2532 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2533 bool valr = fold_constant_to_bool(expression->right);
2534 return create_Const_from_bool(mode, valr);
2537 return produce_condition_result(expression->right, mode, dbgi);
2540 return produce_condition_result((const expression_t*) expression, mode,
2544 static ir_node *create_assign_binop(const binary_expression_t *expression)
2546 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2547 const expression_t *left_expr = expression->left;
2548 type_t *type = skip_typeref(left_expr->base.type);
2549 ir_node *right = expression_to_firm(expression->right);
2550 ir_node *left_addr = expression_to_addr(left_expr);
2551 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2552 ir_node *result = create_op(dbgi, expression, left, right);
2554 result = create_cast(dbgi, result, expression->right->base.type, type);
2556 result = set_value_for_expression_addr(left_expr, result, left_addr);
2558 if (!is_type_compound(type)) {
2559 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2560 result = create_conv(dbgi, result, mode_arithmetic);
2565 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2567 expression_kind_t kind = expression->base.kind;
2570 case EXPR_BINARY_EQUAL:
2571 case EXPR_BINARY_NOTEQUAL:
2572 case EXPR_BINARY_LESS:
2573 case EXPR_BINARY_LESSEQUAL:
2574 case EXPR_BINARY_GREATER:
2575 case EXPR_BINARY_GREATEREQUAL:
2576 case EXPR_BINARY_ISGREATER:
2577 case EXPR_BINARY_ISGREATEREQUAL:
2578 case EXPR_BINARY_ISLESS:
2579 case EXPR_BINARY_ISLESSEQUAL:
2580 case EXPR_BINARY_ISLESSGREATER:
2581 case EXPR_BINARY_ISUNORDERED: {
2582 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2583 ir_node *left = expression_to_firm(expression->left);
2584 ir_node *right = expression_to_firm(expression->right);
2585 ir_relation relation = get_relation(kind);
2586 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2589 case EXPR_BINARY_ASSIGN: {
2590 ir_node *addr = expression_to_addr(expression->left);
2591 ir_node *right = expression_to_firm(expression->right);
2593 = set_value_for_expression_addr(expression->left, right, addr);
2595 type_t *type = skip_typeref(expression->base.type);
2596 if (!is_type_compound(type)) {
2597 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2598 res = create_conv(NULL, res, mode_arithmetic);
2602 case EXPR_BINARY_ADD:
2603 case EXPR_BINARY_SUB:
2604 case EXPR_BINARY_MUL:
2605 case EXPR_BINARY_DIV:
2606 case EXPR_BINARY_MOD:
2607 case EXPR_BINARY_BITWISE_AND:
2608 case EXPR_BINARY_BITWISE_OR:
2609 case EXPR_BINARY_BITWISE_XOR:
2610 case EXPR_BINARY_SHIFTLEFT:
2611 case EXPR_BINARY_SHIFTRIGHT:
2613 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2614 ir_node *left = expression_to_firm(expression->left);
2615 ir_node *right = expression_to_firm(expression->right);
2616 return create_op(dbgi, expression, left, right);
2618 case EXPR_BINARY_LOGICAL_AND:
2619 case EXPR_BINARY_LOGICAL_OR:
2620 return create_lazy_op(expression);
2621 case EXPR_BINARY_COMMA:
2622 /* create side effects of left side */
2623 (void) expression_to_firm(expression->left);
2624 return _expression_to_firm(expression->right);
2626 case EXPR_BINARY_ADD_ASSIGN:
2627 case EXPR_BINARY_SUB_ASSIGN:
2628 case EXPR_BINARY_MUL_ASSIGN:
2629 case EXPR_BINARY_MOD_ASSIGN:
2630 case EXPR_BINARY_DIV_ASSIGN:
2631 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2632 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2633 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2634 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2635 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2636 return create_assign_binop(expression);
2638 panic("invalid binexpr type");
2642 static ir_node *array_access_addr(const array_access_expression_t *expression)
2644 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2645 ir_node *base_addr = expression_to_firm(expression->array_ref);
2646 ir_node *offset = expression_to_firm(expression->index);
2647 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2648 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2649 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2654 static ir_node *array_access_to_firm(
2655 const array_access_expression_t *expression)
2657 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2658 ir_node *addr = array_access_addr(expression);
2659 type_t *type = revert_automatic_type_conversion(
2660 (const expression_t*) expression);
2661 type = skip_typeref(type);
2663 return deref_address(dbgi, type, addr);
2666 static long get_offsetof_offset(const offsetof_expression_t *expression)
2668 type_t *orig_type = expression->type;
2671 designator_t *designator = expression->designator;
2672 for ( ; designator != NULL; designator = designator->next) {
2673 type_t *type = skip_typeref(orig_type);
2674 /* be sure the type is constructed */
2675 (void) get_ir_type(type);
2677 if (designator->symbol != NULL) {
2678 assert(is_type_compound(type));
2679 symbol_t *symbol = designator->symbol;
2681 compound_t *compound = type->compound.compound;
2682 entity_t *iter = compound->members.entities;
2683 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2685 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2686 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2687 offset += get_entity_offset(iter->compound_member.entity);
2689 orig_type = iter->declaration.type;
2691 expression_t *array_index = designator->array_index;
2692 assert(designator->array_index != NULL);
2693 assert(is_type_array(type));
2695 long index = fold_constant_to_int(array_index);
2696 ir_type *arr_type = get_ir_type(type);
2697 ir_type *elem_type = get_array_element_type(arr_type);
2698 long elem_size = get_type_size_bytes(elem_type);
2700 offset += index * elem_size;
2702 orig_type = type->array.element_type;
2709 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2711 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2712 long offset = get_offsetof_offset(expression);
2713 ir_tarval *tv = new_tarval_from_long(offset, mode);
2714 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2716 return new_d_Const(dbgi, tv);
2719 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2720 ir_entity *entity, type_t *type);
2721 static ir_initializer_t *create_ir_initializer(
2722 const initializer_t *initializer, type_t *type);
2724 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2725 initializer_t *initializer,
2728 /* create the ir_initializer */
2729 PUSH_IRG(get_const_code_irg());
2730 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2733 ident *const id = id_unique("initializer.%u");
2734 ir_type *const irtype = get_ir_type(type);
2735 ir_type *const global_type = get_glob_type();
2736 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2737 set_entity_ld_ident(entity, id);
2738 set_entity_visibility(entity, ir_visibility_private);
2739 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2740 set_entity_initializer(entity, irinitializer);
2744 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2746 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2747 type_t *type = expression->type;
2748 initializer_t *initializer = expression->initializer;
2750 if (expression->global_scope ||
2751 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2752 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2753 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2754 return create_symconst(dbgi, entity);
2756 /* create an entity on the stack */
2757 ident *const id = id_unique("CompLit.%u");
2758 ir_type *const irtype = get_ir_type(type);
2759 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2761 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2762 set_entity_ld_ident(entity, id);
2764 /* create initialisation code */
2765 create_local_initializer(initializer, dbgi, entity, type);
2767 /* create a sel for the compound literal address */
2768 ir_node *frame = get_irg_frame(current_ir_graph);
2769 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2774 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2776 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2777 type_t *const type = expr->type;
2778 ir_node *const addr = compound_literal_addr(expr);
2779 return deref_address(dbgi, type, addr);
2783 * Transform a sizeof expression into Firm code.
2785 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2787 type_t *const type = skip_typeref(expression->type);
2788 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2789 if (is_type_array(type) && type->array.is_vla
2790 && expression->tp_expression != NULL) {
2791 expression_to_firm(expression->tp_expression);
2794 return get_type_size_node(type);
2797 static entity_t *get_expression_entity(const expression_t *expression)
2799 if (expression->kind != EXPR_REFERENCE)
2802 return expression->reference.entity;
2805 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2807 switch(entity->kind) {
2808 case DECLARATION_KIND_CASES:
2809 return entity->declaration.alignment;
2812 return entity->compound.alignment;
2813 case ENTITY_TYPEDEF:
2814 return entity->typedefe.alignment;
2822 * Transform an alignof expression into Firm code.
2824 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2826 unsigned alignment = 0;
2828 const expression_t *tp_expression = expression->tp_expression;
2829 if (tp_expression != NULL) {
2830 entity_t *entity = get_expression_entity(tp_expression);
2831 if (entity != NULL) {
2832 alignment = get_cparser_entity_alignment(entity);
2836 if (alignment == 0) {
2837 type_t *type = expression->type;
2838 alignment = get_type_alignment(type);
2841 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2842 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2843 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2844 return new_d_Const(dbgi, tv);
2847 static void init_ir_types(void);
2849 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2851 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2853 bool constant_folding_old = constant_folding;
2854 constant_folding = true;
2855 int old_optimize = get_optimize();
2856 int old_constant_folding = get_opt_constant_folding();
2858 set_opt_constant_folding(1);
2862 PUSH_IRG(get_const_code_irg());
2863 ir_node *const cnst = _expression_to_firm(expression);
2866 set_optimize(old_optimize);
2867 set_opt_constant_folding(old_constant_folding);
2869 if (!is_Const(cnst)) {
2870 panic("couldn't fold constant");
2873 constant_folding = constant_folding_old;
2875 ir_tarval *const tv = get_Const_tarval(cnst);
2876 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2877 return tarval_convert_to(tv, mode);
2880 /* this function is only used in parser.c, but it relies on libfirm functionality */
2881 bool constant_is_negative(const expression_t *expression)
2883 ir_tarval *tv = fold_constant_to_tarval(expression);
2884 return tarval_is_negative(tv);
2887 long fold_constant_to_int(const expression_t *expression)
2889 ir_tarval *tv = fold_constant_to_tarval(expression);
2890 if (!tarval_is_long(tv)) {
2891 panic("result of constant folding is not integer");
2894 return get_tarval_long(tv);
2897 bool fold_constant_to_bool(const expression_t *expression)
2899 ir_tarval *tv = fold_constant_to_tarval(expression);
2900 return !tarval_is_null(tv);
2903 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2905 /* first try to fold a constant condition */
2906 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2907 bool val = fold_constant_to_bool(expression->condition);
2909 expression_t *true_expression = expression->true_expression;
2910 if (true_expression == NULL)
2911 true_expression = expression->condition;
2912 return expression_to_firm(true_expression);
2914 return expression_to_firm(expression->false_expression);
2918 jump_target true_target;
2919 jump_target false_target;
2920 init_jump_target(&true_target, NULL);
2921 init_jump_target(&false_target, NULL);
2922 ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2924 ir_node *val = NULL;
2925 jump_target exit_target;
2926 init_jump_target(&exit_target, NULL);
2928 if (enter_jump_target(&true_target)) {
2929 if (expression->true_expression) {
2930 val = expression_to_firm(expression->true_expression);
2931 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2934 /* Condition ended with a short circuit (&&, ||, !) operation or a
2935 * comparison. Generate a "1" as value for the true branch. */
2936 val = new_Const(get_mode_one(mode_Is));
2938 jump_to_target(&exit_target);
2941 if (enter_jump_target(&false_target)) {
2942 ir_node *const false_val = expression_to_firm(expression->false_expression);
2943 jump_to_target(&exit_target);
2945 ir_node *const in[] = { val, false_val };
2946 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2947 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2953 if (!enter_jump_target(&exit_target)) {
2954 set_cur_block(new_Block(0, NULL));
2955 type_t *const type = skip_typeref(expression->base.type);
2956 if (!is_type_void(type))
2957 val = new_Unknown(get_ir_mode_arithmetic(type));
2963 * Returns an IR-node representing the address of a field.
2965 static ir_node *select_addr(const select_expression_t *expression)
2967 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2969 construct_select_compound(expression);
2971 ir_node *compound_addr = expression_to_firm(expression->compound);
2973 entity_t *entry = expression->compound_entry;
2974 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2975 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2977 if (constant_folding) {
2978 ir_mode *mode = get_irn_mode(compound_addr);
2979 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2980 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2981 return new_d_Add(dbgi, compound_addr, ofs, mode);
2983 ir_entity *irentity = entry->compound_member.entity;
2984 assert(irentity != NULL);
2985 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2989 static ir_node *select_to_firm(const select_expression_t *expression)
2991 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2992 ir_node *addr = select_addr(expression);
2993 type_t *type = revert_automatic_type_conversion(
2994 (const expression_t*) expression);
2995 type = skip_typeref(type);
2997 entity_t *entry = expression->compound_entry;
2998 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3000 if (entry->compound_member.bitfield) {
3001 return bitfield_extract_to_firm(expression, addr);
3004 return deref_address(dbgi, type, addr);
3007 /* Values returned by __builtin_classify_type. */
3008 typedef enum gcc_type_class
3014 enumeral_type_class,
3017 reference_type_class,
3021 function_type_class,
3032 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3034 type_t *type = expr->type_expression->base.type;
3036 /* FIXME gcc returns different values depending on whether compiling C or C++
3037 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3040 type = skip_typeref(type);
3041 switch (type->kind) {
3043 const atomic_type_t *const atomic_type = &type->atomic;
3044 switch (atomic_type->akind) {
3045 /* gcc cannot do that */
3046 case ATOMIC_TYPE_VOID:
3047 tc = void_type_class;
3050 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3051 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3052 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3053 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3054 case ATOMIC_TYPE_SHORT:
3055 case ATOMIC_TYPE_USHORT:
3056 case ATOMIC_TYPE_INT:
3057 case ATOMIC_TYPE_UINT:
3058 case ATOMIC_TYPE_LONG:
3059 case ATOMIC_TYPE_ULONG:
3060 case ATOMIC_TYPE_LONGLONG:
3061 case ATOMIC_TYPE_ULONGLONG:
3062 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3063 tc = integer_type_class;
3066 case ATOMIC_TYPE_FLOAT:
3067 case ATOMIC_TYPE_DOUBLE:
3068 case ATOMIC_TYPE_LONG_DOUBLE:
3069 tc = real_type_class;
3072 panic("Unexpected atomic type.");
3075 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3076 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3077 case TYPE_ARRAY: /* gcc handles this as pointer */
3078 case TYPE_FUNCTION: /* gcc handles this as pointer */
3079 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3080 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3081 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3083 /* gcc handles this as integer */
3084 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3086 /* gcc classifies the referenced type */
3087 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3089 /* typedef/typeof should be skipped already */
3095 panic("unexpected type.");
3099 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3100 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3101 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3102 return new_d_Const(dbgi, tv);
3105 static ir_node *function_name_to_firm(
3106 const funcname_expression_t *const expr)
3108 switch(expr->kind) {
3109 case FUNCNAME_FUNCTION:
3110 case FUNCNAME_PRETTY_FUNCTION:
3111 case FUNCNAME_FUNCDNAME:
3112 if (current_function_name == NULL) {
3113 position_t const *const src_pos = &expr->base.pos;
3114 char const *const name = current_function_entity->base.symbol->string;
3115 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3116 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3118 return current_function_name;
3119 case FUNCNAME_FUNCSIG:
3120 if (current_funcsig == NULL) {
3121 position_t const *const src_pos = &expr->base.pos;
3122 ir_entity *const ent = get_irg_entity(current_ir_graph);
3123 char const *const name = get_entity_ld_name(ent);
3124 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3125 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3127 return current_funcsig;
3129 panic("Unsupported function name");
3132 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3134 statement_t *statement = expr->statement;
3136 assert(statement->kind == STATEMENT_COMPOUND);
3137 return compound_statement_to_firm(&statement->compound);
3140 static ir_node *va_start_expression_to_firm(
3141 const va_start_expression_t *const expr)
3143 ir_entity *param_ent = current_vararg_entity;
3144 if (param_ent == NULL) {
3145 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3146 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3147 ir_type *const param_type = get_unknown_type();
3148 param_ent = new_parameter_entity(frame_type, n, param_type);
3149 current_vararg_entity = param_ent;
3152 ir_node *const frame = get_irg_frame(current_ir_graph);
3153 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3154 ir_node *const no_mem = new_NoMem();
3155 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3157 set_value_for_expression(expr->ap, arg_sel);
3162 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3164 type_t *const type = expr->base.type;
3165 expression_t *const ap_expr = expr->ap;
3166 ir_node *const ap_addr = expression_to_addr(ap_expr);
3167 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3168 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3169 ir_node *const res = deref_address(dbgi, type, ap);
3171 ir_node *const cnst = get_type_size_node(expr->base.type);
3172 ir_mode *const mode = get_irn_mode(cnst);
3173 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3174 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3175 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3176 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3177 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3179 set_value_for_expression_addr(ap_expr, add, ap_addr);
3185 * Generate Firm for a va_copy expression.
3187 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3189 ir_node *const src = expression_to_firm(expr->src);
3190 set_value_for_expression(expr->dst, src);
3194 static ir_node *dereference_addr(const unary_expression_t *const expression)
3196 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3197 return expression_to_firm(expression->value);
3201 * Returns a IR-node representing an lvalue of the given expression.
3203 static ir_node *expression_to_addr(const expression_t *expression)
3205 switch(expression->kind) {
3206 case EXPR_ARRAY_ACCESS:
3207 return array_access_addr(&expression->array_access);
3209 return call_expression_to_firm(&expression->call);
3210 case EXPR_COMPOUND_LITERAL:
3211 return compound_literal_addr(&expression->compound_literal);
3212 case EXPR_REFERENCE:
3213 return reference_addr(&expression->reference);
3215 return select_addr(&expression->select);
3216 case EXPR_UNARY_DEREFERENCE:
3217 return dereference_addr(&expression->unary);
3221 panic("trying to get address of non-lvalue");
3224 static ir_node *builtin_constant_to_firm(
3225 const builtin_constant_expression_t *expression)
3227 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3228 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3229 return create_Const_from_bool(mode, v);
3232 static ir_node *builtin_types_compatible_to_firm(
3233 const builtin_types_compatible_expression_t *expression)
3235 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3236 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3237 bool const value = types_compatible(left, right);
3238 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3239 return create_Const_from_bool(mode, value);
3242 static void prepare_label_target(label_t *const label)
3244 if (label->address_taken && !label->indirect_block) {
3245 ir_node *const iblock = new_immBlock();
3246 label->indirect_block = iblock;
3247 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3248 jump_from_block_to_target(&label->target, iblock);
3253 * Pointer to a label. This is used for the
3254 * GNU address-of-label extension.
3256 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3258 /* Beware: Might be called from create initializer with current_ir_graph
3259 * set to const_code_irg. */
3260 PUSH_IRG(current_function);
3261 prepare_label_target(label->label);
3264 symconst_symbol value;
3265 value.entity_p = create_Block_entity(label->label->indirect_block);
3266 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3267 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3271 * creates firm nodes for an expression. The difference between this function
3272 * and expression_to_firm is, that this version might produce mode_b nodes
3273 * instead of mode_Is.
3275 static ir_node *_expression_to_firm(expression_t const *const expr)
3278 if (!constant_folding) {
3279 assert(!expr->base.transformed);
3280 ((expression_t*)expr)->base.transformed = true;
3284 switch (expr->kind) {
3285 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3286 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3287 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3288 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3289 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3290 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3291 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3292 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3293 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3294 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3295 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3296 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3297 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3298 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3299 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3300 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3301 case EXPR_SELECT: return select_to_firm( &expr->select);
3302 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3303 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3304 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3305 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3306 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3307 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3309 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.pos, "str.%u", &expr->string_literal.value);
3311 case EXPR_ERROR: break;
3313 panic("invalid expression");
3317 * Check if a given expression is a GNU __builtin_expect() call.
3319 static bool is_builtin_expect(const expression_t *expression)
3321 if (expression->kind != EXPR_CALL)
3324 expression_t *function = expression->call.function;
3325 if (function->kind != EXPR_REFERENCE)
3327 reference_expression_t *ref = &function->reference;
3328 if (ref->entity->kind != ENTITY_FUNCTION ||
3329 ref->entity->function.btk != BUILTIN_EXPECT)
3335 static bool produces_mode_b(const expression_t *expression)
3337 switch (expression->kind) {
3338 case EXPR_BINARY_EQUAL:
3339 case EXPR_BINARY_NOTEQUAL:
3340 case EXPR_BINARY_LESS:
3341 case EXPR_BINARY_LESSEQUAL:
3342 case EXPR_BINARY_GREATER:
3343 case EXPR_BINARY_GREATEREQUAL:
3344 case EXPR_BINARY_ISGREATER:
3345 case EXPR_BINARY_ISGREATEREQUAL:
3346 case EXPR_BINARY_ISLESS:
3347 case EXPR_BINARY_ISLESSEQUAL:
3348 case EXPR_BINARY_ISLESSGREATER:
3349 case EXPR_BINARY_ISUNORDERED:
3350 case EXPR_UNARY_NOT:
3354 if (is_builtin_expect(expression)) {
3355 expression_t *argument = expression->call.arguments->expression;
3356 return produces_mode_b(argument);
3359 case EXPR_BINARY_COMMA:
3360 return produces_mode_b(expression->binary.right);
3367 static ir_node *expression_to_firm(const expression_t *expression)
3369 if (!produces_mode_b(expression)) {
3370 ir_node *res = _expression_to_firm(expression);
3371 assert(res == NULL || get_irn_mode(res) != mode_b);
3375 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3376 return new_Const(fold_constant_to_tarval(expression));
3379 /* we have to produce a 0/1 from the mode_b expression */
3380 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3381 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3382 return produce_condition_result(expression, mode, dbgi);
3386 * create a short-circuit expression evaluation that tries to construct
3387 * efficient control flow structures for &&, || and ! expressions
3389 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3391 switch(expression->kind) {
3392 case EXPR_UNARY_NOT: {
3393 const unary_expression_t *unary_expression = &expression->unary;
3394 create_condition_evaluation(unary_expression->value, false_target, true_target);
3397 case EXPR_BINARY_LOGICAL_AND: {
3398 jump_target extra_target;
3399 init_jump_target(&extra_target, NULL);
3400 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3401 if (enter_jump_target(&extra_target))
3402 create_condition_evaluation(expression->binary.right, true_target, false_target);
3405 case EXPR_BINARY_LOGICAL_OR: {
3406 jump_target extra_target;
3407 init_jump_target(&extra_target, NULL);
3408 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3409 if (enter_jump_target(&extra_target))
3410 create_condition_evaluation(expression->binary.right, true_target, false_target);
3417 ir_node *cond_expr = _expression_to_firm(expression);
3418 if (is_Const(cond_expr)) {
3419 if (tarval_is_null(get_Const_tarval(cond_expr))) {
3420 jump_to_target(false_target);
3422 jump_to_target(true_target);
3425 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3426 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3427 ir_node *cond = new_d_Cond(dbgi, condition);
3428 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3429 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3431 /* set branch prediction info based on __builtin_expect */
3432 if (is_builtin_expect(expression) && is_Cond(cond)) {
3433 call_argument_t *argument = expression->call.arguments->next;
3434 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3435 bool const cnst = fold_constant_to_bool(argument->expression);
3436 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3437 set_Cond_jmp_pred(cond, pred);
3441 add_pred_to_jump_target(true_target, true_proj);
3442 add_pred_to_jump_target(false_target, false_proj);
3444 set_unreachable_now();
3448 static void create_variable_entity(entity_t *variable,
3449 declaration_kind_t declaration_kind,
3450 ir_type *parent_type)
3452 assert(variable->kind == ENTITY_VARIABLE);
3453 type_t *type = skip_typeref(variable->declaration.type);
3455 ident *const id = new_id_from_str(variable->base.symbol->string);
3456 ir_type *const irtype = get_ir_type(type);
3457 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
3458 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3459 unsigned alignment = variable->declaration.alignment;
3461 set_entity_alignment(irentity, alignment);
3463 handle_decl_modifiers(irentity, variable);
3465 variable->declaration.kind = (unsigned char) declaration_kind;
3466 variable->variable.v.entity = irentity;
3467 set_entity_ld_ident(irentity, create_ld_ident(variable));
3469 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3470 set_entity_volatility(irentity, volatility_is_volatile);
3475 typedef struct type_path_entry_t type_path_entry_t;
3476 struct type_path_entry_t {
3478 ir_initializer_t *initializer;
3480 entity_t *compound_entry;
3483 typedef struct type_path_t type_path_t;
3484 struct type_path_t {
3485 type_path_entry_t *path;
3490 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3492 size_t len = ARR_LEN(path->path);
3494 for (size_t i = 0; i < len; ++i) {
3495 const type_path_entry_t *entry = & path->path[i];
3497 type_t *type = skip_typeref(entry->type);
3498 if (is_type_compound(type)) {
3499 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3500 } else if (is_type_array(type)) {
3501 fprintf(stderr, "[%u]", (unsigned) entry->index);
3503 fprintf(stderr, "-INVALID-");
3506 fprintf(stderr, " (");
3507 print_type(path->top_type);
3508 fprintf(stderr, ")");
3511 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3513 size_t len = ARR_LEN(path->path);
3515 return & path->path[len-1];
3518 static type_path_entry_t *append_to_type_path(type_path_t *path)
3520 size_t len = ARR_LEN(path->path);
3521 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3523 type_path_entry_t *result = & path->path[len];
3524 memset(result, 0, sizeof(result[0]));
3528 static size_t get_compound_member_count(const compound_type_t *type)
3530 compound_t *compound = type->compound;
3531 size_t n_members = 0;
3532 entity_t *member = compound->members.entities;
3533 for ( ; member != NULL; member = member->base.next) {
3540 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3542 type_t *orig_top_type = path->top_type;
3543 type_t *top_type = skip_typeref(orig_top_type);
3545 assert(is_type_compound(top_type) || is_type_array(top_type));
3547 if (ARR_LEN(path->path) == 0) {
3550 type_path_entry_t *top = get_type_path_top(path);
3551 ir_initializer_t *initializer = top->initializer;
3552 return get_initializer_compound_value(initializer, top->index);
3556 static void descend_into_subtype(type_path_t *path)
3558 type_t *orig_top_type = path->top_type;
3559 type_t *top_type = skip_typeref(orig_top_type);
3561 assert(is_type_compound(top_type) || is_type_array(top_type));
3563 ir_initializer_t *initializer = get_initializer_entry(path);
3565 type_path_entry_t *top = append_to_type_path(path);
3566 top->type = top_type;
3570 if (is_type_compound(top_type)) {
3571 compound_t *const compound = top_type->compound.compound;
3572 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3574 top->compound_entry = entry;
3576 len = get_compound_member_count(&top_type->compound);
3577 if (entry != NULL) {
3578 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3579 path->top_type = entry->declaration.type;
3582 assert(is_type_array(top_type));
3583 assert(top_type->array.size > 0);
3586 path->top_type = top_type->array.element_type;
3587 len = top_type->array.size;
3589 if (initializer == NULL
3590 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3591 initializer = create_initializer_compound(len);
3592 /* we have to set the entry at the 2nd latest path entry... */
3593 size_t path_len = ARR_LEN(path->path);
3594 assert(path_len >= 1);
3596 type_path_entry_t *entry = & path->path[path_len-2];
3597 ir_initializer_t *tinitializer = entry->initializer;
3598 set_initializer_compound_value(tinitializer, entry->index,
3602 top->initializer = initializer;
3605 static void ascend_from_subtype(type_path_t *path)
3607 type_path_entry_t *top = get_type_path_top(path);
3609 path->top_type = top->type;
3611 size_t len = ARR_LEN(path->path);
3612 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3615 static void walk_designator(type_path_t *path, const designator_t *designator)
3617 /* designators start at current object type */
3618 ARR_RESIZE(type_path_entry_t, path->path, 1);
3620 for ( ; designator != NULL; designator = designator->next) {
3621 type_path_entry_t *top = get_type_path_top(path);
3622 type_t *orig_type = top->type;
3623 type_t *type = skip_typeref(orig_type);
3625 if (designator->symbol != NULL) {
3626 assert(is_type_compound(type));
3628 symbol_t *symbol = designator->symbol;
3630 compound_t *compound = type->compound.compound;
3631 entity_t *iter = compound->members.entities;
3632 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3633 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3635 /* revert previous initialisations of other union elements */
3636 if (type->kind == TYPE_COMPOUND_UNION) {
3637 ir_initializer_t *initializer = top->initializer;
3638 if (initializer != NULL
3639 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3640 /* are we writing to a new element? */
3641 ir_initializer_t *oldi
3642 = get_initializer_compound_value(initializer, index);
3643 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3644 /* clear initializer */
3646 = get_initializer_compound_n_entries(initializer);
3647 ir_initializer_t *nulli = get_initializer_null();
3648 for (size_t i = 0; i < len; ++i) {
3649 set_initializer_compound_value(initializer, i,
3656 top->type = orig_type;
3657 top->compound_entry = iter;
3659 orig_type = iter->declaration.type;
3661 expression_t *array_index = designator->array_index;
3662 assert(is_type_array(type));
3664 long index = fold_constant_to_int(array_index);
3665 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3667 top->type = orig_type;
3668 top->index = (size_t) index;
3669 orig_type = type->array.element_type;
3671 path->top_type = orig_type;
3673 if (designator->next != NULL) {
3674 descend_into_subtype(path);
3678 path->invalid = false;
3681 static void advance_current_object(type_path_t *path)
3683 if (path->invalid) {
3684 /* TODO: handle this... */
3685 panic("invalid initializer (excessive elements)");
3688 type_path_entry_t *top = get_type_path_top(path);
3690 type_t *type = skip_typeref(top->type);
3691 if (is_type_union(type)) {
3692 /* only the first element is initialized in unions */
3693 top->compound_entry = NULL;
3694 } else if (is_type_struct(type)) {
3695 entity_t *entry = top->compound_entry;
3698 entry = skip_unnamed_bitfields(entry->base.next);
3699 top->compound_entry = entry;
3700 if (entry != NULL) {
3701 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3702 path->top_type = entry->declaration.type;
3706 assert(is_type_array(type));
3709 if (!type->array.size_constant || top->index < type->array.size) {
3714 /* we're past the last member of the current sub-aggregate, try if we
3715 * can ascend in the type hierarchy and continue with another subobject */
3716 size_t len = ARR_LEN(path->path);
3719 ascend_from_subtype(path);
3720 advance_current_object(path);
3722 path->invalid = true;
3727 static ir_initializer_t *create_ir_initializer_value(
3728 const initializer_value_t *initializer)
3730 expression_t *expr = initializer->value;
3731 type_t *type = skip_typeref(expr->base.type);
3733 if (is_type_compound(type)) {
3734 if (expr->kind == EXPR_UNARY_CAST) {
3735 expr = expr->unary.value;
3736 type = skip_typeref(expr->base.type);
3738 /* must be a compound literal... */
3739 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3740 return create_ir_initializer(expr->compound_literal.initializer,
3745 ir_node *value = expression_to_firm(expr);
3746 value = conv_to_storage_type(NULL, value, type);
3747 return create_initializer_const(value);
3750 /** Tests whether type can be initialized by a string constant */
3751 static bool is_string_type(type_t *type)
3753 if (!is_type_array(type))
3756 type_t *const inner = skip_typeref(type->array.element_type);
3757 return is_type_integer(inner);
3760 static ir_initializer_t *create_ir_initializer_list(
3761 const initializer_list_t *initializer, type_t *type)
3764 memset(&path, 0, sizeof(path));
3765 path.top_type = type;
3766 path.path = NEW_ARR_F(type_path_entry_t, 0);
3768 descend_into_subtype(&path);
3770 for (size_t i = 0; i < initializer->len; ++i) {
3771 const initializer_t *sub_initializer = initializer->initializers[i];
3773 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3774 walk_designator(&path, sub_initializer->designator.designator);
3778 if (sub_initializer->kind == INITIALIZER_VALUE) {
3779 const expression_t *expr = sub_initializer->value.value;
3780 const type_t *expr_type = skip_typeref(expr->base.type);
3781 /* we might have to descend into types until the types match */
3783 type_t *orig_top_type = path.top_type;
3784 type_t *top_type = skip_typeref(orig_top_type);
3786 if (types_compatible(top_type, expr_type))
3788 descend_into_subtype(&path);
3790 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3791 /* we might have to descend into types until we're at a scalar
3794 type_t *orig_top_type = path.top_type;
3795 type_t *top_type = skip_typeref(orig_top_type);
3797 if (is_string_type(top_type))
3799 descend_into_subtype(&path);
3803 ir_initializer_t *sub_irinitializer
3804 = create_ir_initializer(sub_initializer, path.top_type);
3806 size_t path_len = ARR_LEN(path.path);
3807 assert(path_len >= 1);
3808 type_path_entry_t *entry = & path.path[path_len-1];
3809 ir_initializer_t *tinitializer = entry->initializer;
3810 set_initializer_compound_value(tinitializer, entry->index,
3813 advance_current_object(&path);
3816 assert(ARR_LEN(path.path) >= 1);
3817 ir_initializer_t *result = path.path[0].initializer;
3818 DEL_ARR_F(path.path);
3823 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3825 type = skip_typeref(type);
3827 assert(type->kind == TYPE_ARRAY);
3828 assert(type->array.size_constant);
3829 string_literal_expression_t const *const str = get_init_string(init);
3830 size_t const str_len = str->value.size;
3831 size_t const arr_len = type->array.size;
3832 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3833 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3834 char const * p = str->value.begin;
3835 switch (str->value.encoding) {
3836 case STRING_ENCODING_CHAR:
3837 case STRING_ENCODING_UTF8:
3838 for (size_t i = 0; i != arr_len; ++i) {
3839 char const c = i < str_len ? *p++ : 0;
3840 ir_tarval *const tv = new_tarval_from_long(c, mode);
3841 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3842 set_initializer_compound_value(irinit, i, tvinit);
3846 case STRING_ENCODING_CHAR16:
3847 case STRING_ENCODING_CHAR32:
3848 case STRING_ENCODING_WIDE:
3849 for (size_t i = 0; i != arr_len; ++i) {
3850 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3851 ir_tarval *const tv = new_tarval_from_long(c, mode);
3852 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3853 set_initializer_compound_value(irinit, i, tvinit);
3861 static ir_initializer_t *create_ir_initializer(
3862 const initializer_t *initializer, type_t *type)
3864 switch(initializer->kind) {
3865 case INITIALIZER_STRING:
3866 return create_ir_initializer_string(initializer, type);
3868 case INITIALIZER_LIST:
3869 return create_ir_initializer_list(&initializer->list, type);
3871 case INITIALIZER_VALUE:
3872 return create_ir_initializer_value(&initializer->value);
3874 case INITIALIZER_DESIGNATOR:
3875 panic("unexpected designator initializer");
3877 panic("unknown initializer");
3880 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3881 * are elements [...] the remainder of the aggregate shall be initialized
3882 * implicitly the same as objects that have static storage duration. */
3883 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3886 /* for unions we must NOT do anything for null initializers */
3887 ir_type *owner = get_entity_owner(entity);
3888 if (is_Union_type(owner)) {
3892 ir_type *ent_type = get_entity_type(entity);
3893 /* create sub-initializers for a compound type */
3894 if (is_compound_type(ent_type)) {
3895 unsigned n_members = get_compound_n_members(ent_type);
3896 for (unsigned n = 0; n < n_members; ++n) {
3897 ir_entity *member = get_compound_member(ent_type, n);
3898 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3900 create_dynamic_null_initializer(member, dbgi, addr);
3904 if (is_Array_type(ent_type)) {
3905 assert(has_array_upper_bound(ent_type, 0));
3906 long n = get_array_upper_bound_int(ent_type, 0);
3907 for (long i = 0; i < n; ++i) {
3908 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3909 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3910 ir_node *cnst = new_d_Const(dbgi, index_tv);
3911 ir_node *in[1] = { cnst };
3912 ir_entity *arrent = get_array_element_entity(ent_type);
3913 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3915 create_dynamic_null_initializer(arrent, dbgi, addr);
3920 ir_mode *value_mode = get_type_mode(ent_type);
3921 ir_node *node = new_Const(get_mode_null(value_mode));
3923 /* is it a bitfield type? */
3924 if (is_Primitive_type(ent_type) &&
3925 get_primitive_base_type(ent_type) != NULL) {
3926 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3930 ir_node *mem = get_store();
3931 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3932 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3936 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3937 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3939 switch(get_initializer_kind(initializer)) {
3940 case IR_INITIALIZER_NULL:
3941 create_dynamic_null_initializer(entity, dbgi, base_addr);
3943 case IR_INITIALIZER_CONST: {
3944 ir_node *node = get_initializer_const_value(initializer);
3945 ir_type *ent_type = get_entity_type(entity);
3947 /* is it a bitfield type? */
3948 if (is_Primitive_type(ent_type) &&
3949 get_primitive_base_type(ent_type) != NULL) {
3950 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3954 ir_node *mem = get_store();
3956 if (is_compound_type(ent_type)) {
3957 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3958 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3960 assert(get_type_mode(type) == get_irn_mode(node));
3961 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3962 new_mem = new_Proj(store, mode_M, pn_Store_M);
3967 case IR_INITIALIZER_TARVAL: {
3968 ir_tarval *tv = get_initializer_tarval_value(initializer);
3969 ir_node *cnst = new_d_Const(dbgi, tv);
3970 ir_type *ent_type = get_entity_type(entity);
3972 /* is it a bitfield type? */
3973 if (is_Primitive_type(ent_type) &&
3974 get_primitive_base_type(ent_type) != NULL) {
3975 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3979 assert(get_type_mode(type) == get_tarval_mode(tv));
3980 ir_node *mem = get_store();
3981 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3982 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3986 case IR_INITIALIZER_COMPOUND: {
3987 assert(is_compound_type(type) || is_Array_type(type));
3989 if (is_Array_type(type)) {
3990 assert(has_array_upper_bound(type, 0));
3991 n_members = get_array_upper_bound_int(type, 0);
3993 n_members = get_compound_n_members(type);
3996 if (get_initializer_compound_n_entries(initializer)
3997 != (unsigned) n_members)
3998 panic("initializer doesn't match compound type");
4000 for (int i = 0; i < n_members; ++i) {
4003 ir_entity *sub_entity;
4004 if (is_Array_type(type)) {
4005 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4006 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4007 ir_node *cnst = new_d_Const(dbgi, index_tv);
4008 ir_node *in[1] = { cnst };
4009 irtype = get_array_element_type(type);
4010 sub_entity = get_array_element_entity(type);
4011 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4014 sub_entity = get_compound_member(type, i);
4015 irtype = get_entity_type(sub_entity);
4016 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4020 ir_initializer_t *sub_init
4021 = get_initializer_compound_value(initializer, i);
4023 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4030 panic("invalid ir_initializer");
4033 static void create_dynamic_initializer(ir_initializer_t *initializer,
4034 dbg_info *dbgi, ir_entity *entity)
4036 ir_node *frame = get_irg_frame(current_ir_graph);
4037 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4038 ir_type *type = get_entity_type(entity);
4040 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4043 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4044 ir_entity *entity, type_t *type)
4046 ir_node *memory = get_store();
4047 ir_node *nomem = new_NoMem();
4048 ir_node *frame = get_irg_frame(current_ir_graph);
4049 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4051 if (initializer->kind == INITIALIZER_VALUE) {
4052 initializer_value_t *initializer_value = &initializer->value;
4054 ir_node *value = expression_to_firm(initializer_value->value);
4055 type = skip_typeref(type);
4056 assign_value(dbgi, addr, type, value);
4060 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4061 ir_initializer_t *irinitializer
4062 = create_ir_initializer(initializer, type);
4064 create_dynamic_initializer(irinitializer, dbgi, entity);
4068 /* create a "template" entity which is copied to the entity on the stack */
4069 ir_entity *const init_entity
4070 = create_initializer_entity(dbgi, initializer, type);
4071 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4072 ir_type *const irtype = get_ir_type(type);
4073 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4075 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4076 set_store(copyb_mem);
4079 static void create_initializer_local_variable_entity(entity_t *entity)
4081 assert(entity->kind == ENTITY_VARIABLE);
4082 initializer_t *initializer = entity->variable.initializer;
4083 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4084 ir_entity *irentity = entity->variable.v.entity;
4085 type_t *type = entity->declaration.type;
4087 create_local_initializer(initializer, dbgi, irentity, type);
4090 static void create_variable_initializer(entity_t *entity)
4092 assert(entity->kind == ENTITY_VARIABLE);
4093 initializer_t *initializer = entity->variable.initializer;
4094 if (initializer == NULL)
4097 declaration_kind_t declaration_kind
4098 = (declaration_kind_t) entity->declaration.kind;
4099 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4100 create_initializer_local_variable_entity(entity);
4104 type_t *type = entity->declaration.type;
4105 type_qualifiers_t tq = get_type_qualifier(type, true);
4107 if (initializer->kind == INITIALIZER_VALUE) {
4108 expression_t * value = initializer->value.value;
4109 type_t *const init_type = skip_typeref(value->base.type);
4111 if (!is_type_scalar(init_type)) {
4113 while (value->kind == EXPR_UNARY_CAST)
4114 value = value->unary.value;
4116 if (value->kind != EXPR_COMPOUND_LITERAL)
4117 panic("expected non-scalar initializer to be a compound literal");
4118 initializer = value->compound_literal.initializer;
4119 goto have_initializer;
4122 ir_node * node = expression_to_firm(value);
4123 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4124 node = conv_to_storage_type(dbgi, node, init_type);
4126 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4127 set_value(entity->variable.v.value_number, node);
4129 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4131 ir_entity *irentity = entity->variable.v.entity;
4133 if (tq & TYPE_QUALIFIER_CONST
4134 && get_entity_owner(irentity) != get_tls_type()) {
4135 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4137 set_atomic_ent_value(irentity, node);
4141 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4142 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4144 ir_entity *irentity = entity->variable.v.entity;
4145 ir_initializer_t *irinitializer
4146 = create_ir_initializer(initializer, type);
4148 if (tq & TYPE_QUALIFIER_CONST) {
4149 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4151 set_entity_initializer(irentity, irinitializer);
4155 static void create_variable_length_array(entity_t *entity)
4157 assert(entity->kind == ENTITY_VARIABLE);
4158 assert(entity->variable.initializer == NULL);
4160 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4161 entity->variable.v.vla_base = NULL;
4163 /* TODO: record VLA somewhere so we create the free node when we leave
4167 static void allocate_variable_length_array(entity_t *entity)
4169 assert(entity->kind == ENTITY_VARIABLE);
4170 assert(entity->variable.initializer == NULL);
4171 assert(currently_reachable());
4173 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4174 type_t *type = entity->declaration.type;
4175 ir_type *el_type = get_ir_type(type->array.element_type);
4177 /* make sure size_node is calculated */
4178 get_type_size_node(type);
4179 ir_node *elems = type->array.size_node;
4180 ir_node *mem = get_store();
4181 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4183 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4184 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4187 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4188 entity->variable.v.vla_base = addr;
4191 static bool var_needs_entity(variable_t const *const var)
4193 if (var->address_taken)
4195 type_t *const type = skip_typeref(var->base.type);
4196 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4200 * Creates a Firm local variable from a declaration.
4202 static void create_local_variable(entity_t *entity)
4204 assert(entity->kind == ENTITY_VARIABLE);
4205 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4207 if (!var_needs_entity(&entity->variable)) {
4208 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4209 entity->variable.v.value_number = next_value_number_function;
4210 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4211 ++next_value_number_function;
4215 /* is it a variable length array? */
4216 type_t *const type = skip_typeref(entity->declaration.type);
4217 if (is_type_array(type) && !type->array.size_constant) {
4218 create_variable_length_array(entity);
4222 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4223 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4226 static void create_local_static_variable(entity_t *entity)
4228 assert(entity->kind == ENTITY_VARIABLE);
4229 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4231 type_t *type = skip_typeref(entity->declaration.type);
4232 ir_type *const var_type = entity->variable.thread_local ?
4233 get_tls_type() : get_glob_type();
4234 ir_type *const irtype = get_ir_type(type);
4235 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4237 size_t l = strlen(entity->base.symbol->string);
4238 char buf[l + sizeof(".%u")];
4239 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4240 ident *const id = id_unique(buf);
4241 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4243 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4244 set_entity_volatility(irentity, volatility_is_volatile);
4247 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4248 entity->variable.v.entity = irentity;
4250 set_entity_ld_ident(irentity, id);
4251 set_entity_visibility(irentity, ir_visibility_local);
4253 if (entity->variable.initializer == NULL) {
4254 ir_initializer_t *null_init = get_initializer_null();
4255 set_entity_initializer(irentity, null_init);
4258 PUSH_IRG(get_const_code_irg());
4259 create_variable_initializer(entity);
4265 static ir_node *return_statement_to_firm(return_statement_t *statement)
4267 if (!currently_reachable())
4270 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4271 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4272 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4275 if (!is_type_void(type)) {
4277 res = conv_to_storage_type(dbgi, res, type);
4279 res = new_Unknown(get_ir_mode_storage(type));
4286 ir_node *const in[1] = { res };
4287 ir_node *const store = get_store();
4288 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4290 ir_node *end_block = get_irg_end_block(current_ir_graph);
4291 add_immBlock_pred(end_block, ret);
4293 set_unreachable_now();
4297 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4299 if (!currently_reachable())
4302 return expression_to_firm(statement->expression);
4305 static void create_local_declarations(entity_t*);
4307 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4309 create_local_declarations(compound->scope.entities);
4311 ir_node *result = NULL;
4312 statement_t *statement = compound->statements;
4313 for ( ; statement != NULL; statement = statement->base.next) {
4314 result = statement_to_firm(statement);
4320 static void create_global_variable(entity_t *entity)
4322 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4323 ir_visibility visibility = ir_visibility_external;
4324 storage_class_tag_t storage
4325 = (storage_class_tag_t)entity->declaration.storage_class;
4326 decl_modifiers_t modifiers = entity->declaration.modifiers;
4327 assert(entity->kind == ENTITY_VARIABLE);
4330 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4331 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4332 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4333 case STORAGE_CLASS_TYPEDEF:
4334 case STORAGE_CLASS_AUTO:
4335 case STORAGE_CLASS_REGISTER:
4336 panic("invalid storage class for global var");
4339 /* "common" symbols */
4340 if (storage == STORAGE_CLASS_NONE
4341 && entity->variable.initializer == NULL
4342 && !entity->variable.thread_local
4343 && (modifiers & DM_WEAK) == 0) {
4344 linkage |= IR_LINKAGE_MERGE;
4347 ir_type *var_type = get_glob_type();
4348 if (entity->variable.thread_local) {
4349 var_type = get_tls_type();
4351 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4352 ir_entity *irentity = entity->variable.v.entity;
4353 add_entity_linkage(irentity, linkage);
4354 set_entity_visibility(irentity, visibility);
4355 if (entity->variable.initializer == NULL
4356 && storage != STORAGE_CLASS_EXTERN) {
4357 ir_initializer_t *null_init = get_initializer_null();
4358 set_entity_initializer(irentity, null_init);
4362 static void create_local_declaration(entity_t *entity)
4364 assert(is_declaration(entity));
4366 /* construct type */
4367 (void) get_ir_type(entity->declaration.type);
4368 if (entity->base.symbol == NULL) {
4372 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4373 case STORAGE_CLASS_STATIC:
4374 if (entity->kind == ENTITY_FUNCTION) {
4375 (void)get_function_entity(entity, NULL);
4377 create_local_static_variable(entity);
4380 case STORAGE_CLASS_EXTERN:
4381 if (entity->kind == ENTITY_FUNCTION) {
4382 assert(entity->function.body == NULL);
4383 (void)get_function_entity(entity, NULL);
4385 create_global_variable(entity);
4386 create_variable_initializer(entity);
4389 case STORAGE_CLASS_NONE:
4390 case STORAGE_CLASS_AUTO:
4391 case STORAGE_CLASS_REGISTER:
4392 if (entity->kind == ENTITY_FUNCTION) {
4393 if (entity->function.body != NULL) {
4394 ir_type *owner = get_irg_frame_type(current_ir_graph);
4395 (void)get_function_entity(entity, owner);
4396 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4397 enqueue_inner_function(entity);
4399 (void)get_function_entity(entity, NULL);
4402 create_local_variable(entity);
4405 case STORAGE_CLASS_TYPEDEF:
4408 panic("invalid storage class");
4411 static void create_local_declarations(entity_t *e)
4413 for (; e; e = e->base.next) {
4414 if (is_declaration(e))
4415 create_local_declaration(e);
4419 static void initialize_local_declaration(entity_t *entity)
4421 if (entity->base.symbol == NULL)
4424 // no need to emit code in dead blocks
4425 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4426 && !currently_reachable())
4429 switch ((declaration_kind_t) entity->declaration.kind) {
4430 case DECLARATION_KIND_LOCAL_VARIABLE:
4431 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4432 create_variable_initializer(entity);
4435 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4436 allocate_variable_length_array(entity);
4439 case DECLARATION_KIND_COMPOUND_MEMBER:
4440 case DECLARATION_KIND_GLOBAL_VARIABLE:
4441 case DECLARATION_KIND_FUNCTION:
4442 case DECLARATION_KIND_INNER_FUNCTION:
4445 case DECLARATION_KIND_PARAMETER:
4446 case DECLARATION_KIND_PARAMETER_ENTITY:
4447 panic("can't initialize parameters");
4449 case DECLARATION_KIND_UNKNOWN:
4450 panic("can't initialize unknown declaration");
4452 panic("invalid declaration kind");
4455 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4457 entity_t *entity = statement->declarations_begin;
4461 entity_t *const last = statement->declarations_end;
4462 for ( ;; entity = entity->base.next) {
4463 if (is_declaration(entity)) {
4464 initialize_local_declaration(entity);
4465 } else if (entity->kind == ENTITY_TYPEDEF) {
4466 /* ยง6.7.7:3 Any array size expressions associated with variable length
4467 * array declarators are evaluated each time the declaration of the
4468 * typedef name is reached in the order of execution. */
4469 type_t *const type = skip_typeref(entity->typedefe.type);
4470 if (is_type_array(type) && type->array.is_vla)
4471 get_vla_size(&type->array);
4480 static ir_node *if_statement_to_firm(if_statement_t *statement)
4482 create_local_declarations(statement->scope.entities);
4484 /* Create the condition. */
4485 jump_target true_target;
4486 jump_target false_target;
4487 init_jump_target(&true_target, NULL);
4488 init_jump_target(&false_target, NULL);
4489 if (currently_reachable())
4490 create_condition_evaluation(statement->condition, &true_target, &false_target);
4492 jump_target exit_target;
4493 init_jump_target(&exit_target, NULL);
4495 /* Create the true statement. */
4496 enter_jump_target(&true_target);
4497 statement_to_firm(statement->true_statement);
4498 jump_to_target(&exit_target);
4500 /* Create the false statement. */
4501 enter_jump_target(&false_target);
4502 if (statement->false_statement)
4503 statement_to_firm(statement->false_statement);
4504 jump_to_target(&exit_target);
4506 enter_jump_target(&exit_target);
4510 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4512 create_local_declarations(statement->scope.entities);
4515 PUSH_CONTINUE(NULL);
4517 expression_t *const cond = statement->condition;
4518 /* Avoid an explicit body block in case of do ... while (0);. */
4519 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4520 /* do ... while (0);. */
4521 statement_to_firm(statement->body);
4522 jump_to_target(&continue_target);
4523 enter_jump_target(&continue_target);
4524 jump_to_target(&break_target);
4526 jump_target body_target;
4527 init_jump_target(&body_target, NULL);
4528 jump_to_target(&body_target);
4529 enter_immature_jump_target(&body_target);
4531 statement_to_firm(statement->body);
4532 jump_to_target(&continue_target);
4533 if (enter_jump_target(&continue_target))
4534 create_condition_evaluation(statement->condition, &body_target, &break_target);
4535 enter_jump_target(&body_target);
4537 enter_jump_target(&break_target);
4544 static ir_node *for_statement_to_firm(for_statement_t *statement)
4546 create_local_declarations(statement->scope.entities);
4548 if (currently_reachable()) {
4549 entity_t *entity = statement->scope.entities;
4550 for ( ; entity != NULL; entity = entity->base.next) {
4551 if (!is_declaration(entity))
4554 initialize_local_declaration(entity);
4557 if (statement->initialisation != NULL) {
4558 expression_to_firm(statement->initialisation);
4562 /* Create the header block */
4563 jump_target header_target;
4564 init_jump_target(&header_target, NULL);
4565 jump_to_target(&header_target);
4566 enter_immature_jump_target(&header_target);
4569 expression_t *const step = statement->step;
4571 PUSH_CONTINUE(step ? NULL : header_target.block);
4573 /* Create the condition. */
4574 expression_t *const cond = statement->condition;
4575 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4576 jump_target body_target;
4577 init_jump_target(&body_target, NULL);
4578 create_condition_evaluation(cond, &body_target, &break_target);
4579 enter_jump_target(&body_target);
4582 /* Create the loop body. */
4583 statement_to_firm(statement->body);
4584 jump_to_target(&continue_target);
4586 /* Create the step code. */
4587 if (step && enter_jump_target(&continue_target)) {
4588 expression_to_firm(step);
4589 jump_to_target(&header_target);
4592 enter_jump_target(&header_target);
4593 enter_jump_target(&break_target);
4600 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4602 /* determine number of cases */
4604 for (case_label_statement_t *l = statement->first_case; l != NULL;
4607 if (l->expression == NULL)
4609 if (l->is_empty_range)
4614 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4616 for (case_label_statement_t *l = statement->first_case; l != NULL;
4618 if (l->expression == NULL) {
4619 l->pn = pn_Switch_default;
4622 if (l->is_empty_range)
4624 ir_tarval *min = l->first_case;
4625 ir_tarval *max = l->last_case;
4626 long pn = (long) i+1;
4627 ir_switch_table_set(res, i++, min, max, pn);
4633 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4635 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4636 ir_node *switch_node = NULL;
4638 if (currently_reachable()) {
4639 ir_node *expression = expression_to_firm(statement->expression);
4640 ir_switch_table *table = create_switch_table(statement);
4641 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4643 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4646 set_unreachable_now();
4649 ir_node *const old_switch = current_switch;
4650 const bool old_saw_default_label = saw_default_label;
4651 saw_default_label = false;
4652 current_switch = switch_node;
4654 statement_to_firm(statement->body);
4655 jump_to_target(&break_target);
4657 if (!saw_default_label && switch_node) {
4658 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4659 add_pred_to_jump_target(&break_target, proj);
4662 enter_jump_target(&break_target);
4664 assert(current_switch == switch_node);
4665 current_switch = old_switch;
4666 saw_default_label = old_saw_default_label;
4671 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4673 if (current_switch != NULL && !statement->is_empty_range) {
4674 jump_target case_target;
4675 init_jump_target(&case_target, NULL);
4677 /* Fallthrough from previous case */
4678 jump_to_target(&case_target);
4680 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4681 add_pred_to_jump_target(&case_target, proj);
4682 if (statement->expression == NULL)
4683 saw_default_label = true;
4685 enter_jump_target(&case_target);
4688 return statement_to_firm(statement->statement);
4691 static ir_node *label_to_firm(const label_statement_t *statement)
4693 label_t *const label = statement->label;
4694 prepare_label_target(label);
4695 jump_to_target(&label->target);
4696 if (--label->n_users == 0) {
4697 enter_jump_target(&label->target);
4699 enter_immature_jump_target(&label->target);
4703 return statement_to_firm(statement->statement);
4706 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4708 label_t *const label = stmt->label;
4709 prepare_label_target(label);
4710 jump_to_target(&label->target);
4711 if (--label->n_users == 0)
4712 enter_jump_target(&label->target);
4713 set_unreachable_now();
4717 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4719 if (currently_reachable()) {
4720 ir_node *const op = expression_to_firm(statement->expression);
4721 ARR_APP1(ir_node*, ijmp_ops, op);
4722 jump_to_target(&ijmp_target);
4723 set_unreachable_now();
4728 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4730 bool needs_memory = statement->is_volatile;
4731 size_t n_clobbers = 0;
4732 asm_clobber_t *clobber = statement->clobbers;
4733 for ( ; clobber != NULL; clobber = clobber->next) {
4734 const char *clobber_str = clobber->clobber.begin;
4736 if (!be_is_valid_clobber(clobber_str)) {
4737 errorf(&statement->base.pos,
4738 "invalid clobber '%s' specified", clobber->clobber);
4742 if (streq(clobber_str, "memory")) {
4743 needs_memory = true;
4747 ident *id = new_id_from_str(clobber_str);
4748 obstack_ptr_grow(&asm_obst, id);
4751 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4752 ident **clobbers = NULL;
4753 if (n_clobbers > 0) {
4754 clobbers = obstack_finish(&asm_obst);
4757 size_t n_inputs = 0;
4758 asm_argument_t *argument = statement->inputs;
4759 for ( ; argument != NULL; argument = argument->next)
4761 size_t n_outputs = 0;
4762 argument = statement->outputs;
4763 for ( ; argument != NULL; argument = argument->next)
4766 unsigned next_pos = 0;
4768 ir_node *ins[n_inputs + n_outputs + 1];
4771 ir_asm_constraint tmp_in_constraints[n_outputs];
4773 const expression_t *out_exprs[n_outputs];
4774 ir_node *out_addrs[n_outputs];
4775 size_t out_size = 0;
4777 argument = statement->outputs;
4778 for ( ; argument != NULL; argument = argument->next) {
4779 const char *constraints = argument->constraints.begin;
4780 asm_constraint_flags_t asm_flags
4781 = be_parse_asm_constraints(constraints);
4784 position_t const *const pos = &statement->base.pos;
4785 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4786 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4788 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4789 errorf(pos, "some constraints in '%s' are invalid", constraints);
4792 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4793 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4798 unsigned pos = next_pos++;
4799 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4800 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4801 expression_t *expr = argument->expression;
4802 ir_node *addr = expression_to_addr(expr);
4803 /* in+output, construct an artifical same_as constraint on the
4805 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4807 ir_node *value = get_value_from_lvalue(expr, addr);
4809 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4811 ir_asm_constraint constraint;
4812 constraint.pos = pos;
4813 constraint.constraint = new_id_from_str(buf);
4814 constraint.mode = get_ir_mode_storage(expr->base.type);
4815 tmp_in_constraints[in_size] = constraint;
4816 ins[in_size] = value;
4821 out_exprs[out_size] = expr;
4822 out_addrs[out_size] = addr;
4824 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4825 /* pure memory ops need no input (but we have to make sure we
4826 * attach to the memory) */
4827 assert(! (asm_flags &
4828 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4829 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4830 needs_memory = true;
4832 /* we need to attach the address to the inputs */
4833 expression_t *expr = argument->expression;
4835 ir_asm_constraint constraint;
4836 constraint.pos = pos;
4837 constraint.constraint = new_id_from_str(constraints);
4838 constraint.mode = mode_M;
4839 tmp_in_constraints[in_size] = constraint;
4841 ins[in_size] = expression_to_addr(expr);
4845 errorf(&statement->base.pos,
4846 "only modifiers but no place set in constraints '%s'",
4851 ir_asm_constraint constraint;
4852 constraint.pos = pos;
4853 constraint.constraint = new_id_from_str(constraints);
4854 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4856 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4858 assert(obstack_object_size(&asm_obst)
4859 == out_size * sizeof(ir_asm_constraint));
4860 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4863 obstack_grow(&asm_obst, tmp_in_constraints,
4864 in_size * sizeof(tmp_in_constraints[0]));
4865 /* find and count input and output arguments */
4866 argument = statement->inputs;
4867 for ( ; argument != NULL; argument = argument->next) {
4868 const char *constraints = argument->constraints.begin;
4869 asm_constraint_flags_t asm_flags
4870 = be_parse_asm_constraints(constraints);
4872 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4873 errorf(&statement->base.pos,
4874 "some constraints in '%s' are not supported", constraints);
4877 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4878 errorf(&statement->base.pos,
4879 "some constraints in '%s' are invalid", constraints);
4882 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4883 errorf(&statement->base.pos,
4884 "write flag specified for input constraints '%s'",
4890 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4891 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4892 /* we can treat this as "normal" input */
4893 input = expression_to_firm(argument->expression);
4894 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4895 /* pure memory ops need no input (but we have to make sure we
4896 * attach to the memory) */
4897 assert(! (asm_flags &
4898 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4899 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4900 needs_memory = true;
4901 input = expression_to_addr(argument->expression);
4903 errorf(&statement->base.pos,
4904 "only modifiers but no place set in constraints '%s'",
4909 ir_asm_constraint constraint;
4910 constraint.pos = next_pos++;
4911 constraint.constraint = new_id_from_str(constraints);
4912 constraint.mode = get_irn_mode(input);
4914 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4915 ins[in_size++] = input;
4918 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4919 assert(obstack_object_size(&asm_obst)
4920 == in_size * sizeof(ir_asm_constraint));
4921 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4923 /* create asm node */
4924 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4926 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4928 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4929 out_size, output_constraints,
4930 n_clobbers, clobbers, asm_text);
4932 if (statement->is_volatile) {
4933 set_irn_pinned(node, op_pin_state_pinned);
4935 set_irn_pinned(node, op_pin_state_floats);
4938 /* create output projs & connect them */
4940 ir_node *projm = new_Proj(node, mode_M, out_size);
4945 for (i = 0; i < out_size; ++i) {
4946 const expression_t *out_expr = out_exprs[i];
4948 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
4949 ir_node *proj = new_Proj(node, mode, pn);
4950 ir_node *addr = out_addrs[i];
4952 set_value_for_expression_addr(out_expr, proj, addr);
4958 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4960 statement_to_firm(statement->try_statement);
4961 position_t const *const pos = &statement->base.pos;
4962 warningf(WARN_OTHER, pos, "structured exception handling ignored");
4966 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4968 errorf(&statement->base.pos, "__leave not supported yet");
4973 * Transform a statement.
4975 static ir_node *statement_to_firm(statement_t *const stmt)
4978 assert(!stmt->base.transformed);
4979 stmt->base.transformed = true;
4982 switch (stmt->kind) {
4983 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
4984 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
4985 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
4986 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
4987 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
4988 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
4989 case STATEMENT_EMPTY: return NULL; /* nothing */
4990 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
4991 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
4992 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
4993 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
4994 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
4995 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
4996 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
4997 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
4998 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5002 case STATEMENT_BREAK: tgt = &break_target; goto jump;
5003 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5005 jump_to_target(tgt);
5006 set_unreachable_now();
5010 case STATEMENT_ERROR: panic("error statement");
5012 panic("statement not implemented");
5015 static int count_local_variables(const entity_t *entity,
5016 const entity_t *const last)
5019 entity_t const *const end = last != NULL ? last->base.next : NULL;
5020 for (; entity != end; entity = entity->base.next) {
5021 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5022 !var_needs_entity(&entity->variable))
5028 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5030 int *const count = env;
5032 switch (stmt->kind) {
5033 case STATEMENT_DECLARATION: {
5034 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5035 *count += count_local_variables(decl_stmt->declarations_begin,
5036 decl_stmt->declarations_end);
5041 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5050 * Return the number of local (alias free) variables used by a function.
5052 static int get_function_n_local_vars(entity_t *entity)
5054 const function_t *function = &entity->function;
5057 /* count parameters */
5058 count += count_local_variables(function->parameters.entities, NULL);
5060 /* count local variables declared in body */
5061 walk_statements(function->body, count_local_variables_in_stmt, &count);
5066 * Build Firm code for the parameters of a function.
5068 static void initialize_function_parameters(entity_t *entity)
5070 assert(entity->kind == ENTITY_FUNCTION);
5071 ir_graph *irg = current_ir_graph;
5072 ir_node *args = get_irg_args(irg);
5074 ir_type *function_irtype;
5076 if (entity->function.need_closure) {
5077 /* add an extra parameter for the static link */
5078 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5081 /* Matze: IMO this is wrong, nested functions should have an own
5082 * type and not rely on strange parameters... */
5083 function_irtype = create_method_type(&entity->declaration.type->function, true);
5085 function_irtype = get_ir_type(entity->declaration.type);
5090 entity_t *parameter = entity->function.parameters.entities;
5091 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5092 if (parameter->kind != ENTITY_PARAMETER)
5095 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5096 type_t *type = skip_typeref(parameter->declaration.type);
5098 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5099 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5100 if (var_needs_entity(¶meter->variable)) {
5101 ir_type *frame_type = get_irg_frame_type(irg);
5103 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5104 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5105 parameter->variable.v.entity = param;
5109 ir_mode *param_mode = get_type_mode(param_irtype);
5111 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5112 value = conv_to_storage_type(dbgi, value, type);
5114 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5115 parameter->variable.v.value_number = next_value_number_function;
5116 set_irg_loc_description(current_ir_graph, next_value_number_function,
5118 ++next_value_number_function;
5120 set_value(parameter->variable.v.value_number, value);
5124 static void add_function_pointer(ir_type *segment, ir_entity *method,
5125 const char *unique_template)
5127 ir_type *method_type = get_entity_type(method);
5128 ir_type *ptr_type = new_type_pointer(method_type);
5130 /* these entities don't really have a name but firm only allows
5132 * Note that we mustn't give these entities a name since for example
5133 * Mach-O doesn't allow them. */
5134 ident *ide = id_unique(unique_template);
5135 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5136 ir_graph *irg = get_const_code_irg();
5137 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5140 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5141 set_entity_compiler_generated(ptr, 1);
5142 set_entity_visibility(ptr, ir_visibility_private);
5143 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5144 set_atomic_ent_value(ptr, val);
5148 * Create code for a function and all inner functions.
5150 * @param entity the function entity
5152 static void create_function(entity_t *entity)
5154 assert(entity->kind == ENTITY_FUNCTION);
5155 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5157 if (entity->function.body == NULL)
5160 inner_functions = NULL;
5161 current_trampolines = NULL;
5163 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5164 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5165 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5167 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5168 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5169 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5172 current_function_entity = entity;
5173 current_function_name = NULL;
5174 current_funcsig = NULL;
5177 assert(!ijmp_blocks);
5178 init_jump_target(&ijmp_target, NULL);
5179 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5180 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5182 int n_local_vars = get_function_n_local_vars(entity);
5183 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5184 current_ir_graph = irg;
5186 ir_graph *old_current_function = current_function;
5187 current_function = irg;
5189 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5190 current_vararg_entity = NULL;
5192 set_irg_fp_model(irg, firm_fp_model);
5193 set_irn_dbg_info(get_irg_start_block(irg),
5194 get_entity_dbg_info(function_entity));
5196 next_value_number_function = 0;
5197 initialize_function_parameters(entity);
5198 current_static_link = entity->function.static_link;
5200 statement_to_firm(entity->function.body);
5202 ir_node *end_block = get_irg_end_block(irg);
5204 /* do we have a return statement yet? */
5205 if (currently_reachable()) {
5206 type_t *type = skip_typeref(entity->declaration.type);
5207 assert(is_type_function(type));
5208 type_t *const return_type = skip_typeref(type->function.return_type);
5211 if (is_type_void(return_type)) {
5212 ret = new_Return(get_store(), 0, NULL);
5214 ir_mode *const mode = get_ir_mode_storage(return_type);
5217 /* ยง5.1.2.2.3 main implicitly returns 0 */
5218 if (is_main(entity)) {
5219 in[0] = new_Const(get_mode_null(mode));
5221 in[0] = new_Unknown(mode);
5223 ret = new_Return(get_store(), 1, in);
5225 add_immBlock_pred(end_block, ret);
5228 if (enter_jump_target(&ijmp_target)) {
5230 size_t const n = ARR_LEN(ijmp_ops);
5231 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5232 ir_node *const ijmp = new_IJmp(op);
5233 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5234 ir_node *const block = ijmp_blocks[i];
5235 add_immBlock_pred(block, ijmp);
5236 mature_immBlock(block);
5240 DEL_ARR_F(ijmp_ops);
5241 DEL_ARR_F(ijmp_blocks);
5245 irg_finalize_cons(irg);
5247 /* finalize the frame type */
5248 ir_type *frame_type = get_irg_frame_type(irg);
5249 int n = get_compound_n_members(frame_type);
5252 for (int i = 0; i < n; ++i) {
5253 ir_entity *member = get_compound_member(frame_type, i);
5254 ir_type *entity_type = get_entity_type(member);
5256 int align = get_type_alignment_bytes(entity_type);
5257 if (align > align_all)
5261 misalign = offset % align;
5263 offset += align - misalign;
5267 set_entity_offset(member, offset);
5268 offset += get_type_size_bytes(entity_type);
5270 set_type_size_bytes(frame_type, offset);
5271 set_type_alignment_bytes(frame_type, align_all);
5273 irg_verify(irg, VERIFY_ENFORCE_SSA);
5274 current_vararg_entity = old_current_vararg_entity;
5275 current_function = old_current_function;
5277 if (current_trampolines != NULL) {
5278 DEL_ARR_F(current_trampolines);
5279 current_trampolines = NULL;
5282 /* create inner functions if any */
5283 entity_t **inner = inner_functions;
5284 if (inner != NULL) {
5285 ir_type *rem_outer_frame = current_outer_frame;
5286 current_outer_frame = get_irg_frame_type(current_ir_graph);
5287 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5288 create_function(inner[i]);
5292 current_outer_frame = rem_outer_frame;
5296 static void scope_to_firm(scope_t *scope)
5298 /* first pass: create declarations */
5299 entity_t *entity = scope->entities;
5300 for ( ; entity != NULL; entity = entity->base.next) {
5301 if (entity->base.symbol == NULL)
5304 if (entity->kind == ENTITY_FUNCTION) {
5305 if (entity->function.btk != BUILTIN_NONE) {
5306 /* builtins have no representation */
5309 (void)get_function_entity(entity, NULL);
5310 } else if (entity->kind == ENTITY_VARIABLE) {
5311 create_global_variable(entity);
5312 } else if (entity->kind == ENTITY_NAMESPACE) {
5313 scope_to_firm(&entity->namespacee.members);
5317 /* second pass: create code/initializers */
5318 entity = scope->entities;
5319 for ( ; entity != NULL; entity = entity->base.next) {
5320 if (entity->base.symbol == NULL)
5323 if (entity->kind == ENTITY_FUNCTION) {
5324 if (entity->function.btk != BUILTIN_NONE) {
5325 /* builtins have no representation */
5328 create_function(entity);
5329 } else if (entity->kind == ENTITY_VARIABLE) {
5330 assert(entity->declaration.kind
5331 == DECLARATION_KIND_GLOBAL_VARIABLE);
5332 current_ir_graph = get_const_code_irg();
5333 create_variable_initializer(entity);
5338 void init_ast2firm(void)
5340 obstack_init(&asm_obst);
5341 init_atomic_modes();
5343 ir_set_debug_retrieve(dbg_retrieve);
5344 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5346 /* create idents for all known runtime functions */
5347 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5348 rts_idents[i] = new_id_from_str(rts_data[i].name);
5351 entitymap_init(&entitymap);
5354 static void init_ir_types(void)
5356 static int ir_types_initialized = 0;
5357 if (ir_types_initialized)
5359 ir_types_initialized = 1;
5361 ir_type_char = get_ir_type(type_char);
5363 be_params = be_get_backend_param();
5364 mode_float_arithmetic = be_params->mode_float_arithmetic;
5366 stack_param_align = be_params->stack_param_align;
5369 void exit_ast2firm(void)
5371 entitymap_destroy(&entitymap);
5372 obstack_free(&asm_obst, NULL);
5375 static void global_asm_to_firm(statement_t *s)
5377 for (; s != NULL; s = s->base.next) {
5378 assert(s->kind == STATEMENT_ASM);
5380 char const *const text = s->asms.asm_text.begin;
5381 size_t const size = s->asms.asm_text.size;
5382 ident *const id = new_id_from_chars(text, size);
5387 static const char *get_cwd(void)
5389 static char buf[1024];
5390 if (buf[0] == '\0') {
5391 return getcwd(buf, sizeof(buf));
5396 void translation_unit_to_firm(translation_unit_t *unit)
5398 if (c_mode & _CXX) {
5399 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5400 } else if (c_mode & _C99) {
5401 be_dwarf_set_source_language(DW_LANG_C99);
5402 } else if (c_mode & _C89) {
5403 be_dwarf_set_source_language(DW_LANG_C89);
5405 be_dwarf_set_source_language(DW_LANG_C);
5407 const char *cwd = get_cwd();
5409 be_dwarf_set_compilation_directory(cwd);
5412 /* initialize firm arithmetic */
5413 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5414 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5416 /* just to be sure */
5417 init_jump_target(&break_target, NULL);
5418 init_jump_target(&continue_target, NULL);
5419 current_switch = NULL;
5420 current_translation_unit = unit;
5424 scope_to_firm(&unit->scope);
5425 global_asm_to_firm(unit->global_asm);
5427 current_ir_graph = NULL;
5428 current_translation_unit = NULL;