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 ir_node *get_value_from_lvalue(const expression_t *expression,
2050 if (expression->kind == EXPR_REFERENCE) {
2051 const reference_expression_t *ref = &expression->reference;
2053 entity_t *entity = ref->entity;
2054 assert(entity->kind == ENTITY_VARIABLE
2055 || entity->kind == ENTITY_PARAMETER);
2056 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2058 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2059 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2060 value_number = entity->variable.v.value_number;
2061 assert(addr == NULL);
2062 type_t *type = skip_typeref(expression->base.type);
2063 ir_mode *mode = get_ir_mode_storage(type);
2064 ir_node *res = get_value(value_number, mode);
2065 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2069 assert(addr != NULL);
2070 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2073 if (expression->kind == EXPR_SELECT &&
2074 expression->select.compound_entry->compound_member.bitfield) {
2075 construct_select_compound(&expression->select);
2076 value = bitfield_extract_to_firm(&expression->select, addr);
2078 value = deref_address(dbgi, expression->base.type, addr);
2084 static ir_node *create_incdec(unary_expression_t const *const expr, bool const inc, bool const pre)
2086 type_t *const type = skip_typeref(expr->base.type);
2087 ir_mode *const mode = get_ir_mode_arithmetic(type);
2090 if (is_type_pointer(type)) {
2091 offset = get_type_size_node(type->pointer.points_to);
2093 assert(is_type_arithmetic(type));
2094 offset = new_Const(get_mode_one(mode));
2097 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2098 expression_t const *const value_expr = expr->value;
2099 ir_node *const addr = expression_to_addr(value_expr);
2100 ir_node *const value = get_value_from_lvalue(value_expr, addr);
2101 ir_node *const new_value = inc
2102 ? new_d_Add(dbgi, value, offset, mode)
2103 : new_d_Sub(dbgi, value, offset, mode);
2105 ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2106 return pre ? store_value : value;
2109 static bool is_local_variable(expression_t *expression)
2111 if (expression->kind != EXPR_REFERENCE)
2113 reference_expression_t *ref_expr = &expression->reference;
2114 entity_t *entity = ref_expr->entity;
2115 if (entity->kind != ENTITY_VARIABLE)
2117 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2118 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2121 static ir_relation get_relation(const expression_kind_t kind)
2124 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2125 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2126 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2127 case EXPR_BINARY_ISLESS:
2128 case EXPR_BINARY_LESS: return ir_relation_less;
2129 case EXPR_BINARY_ISLESSEQUAL:
2130 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2131 case EXPR_BINARY_ISGREATER:
2132 case EXPR_BINARY_GREATER: return ir_relation_greater;
2133 case EXPR_BINARY_ISGREATEREQUAL:
2134 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2135 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2140 panic("trying to get ir_relation from non-comparison binexpr type");
2144 * Handle the assume optimizer hint: check if a Confirm
2145 * node can be created.
2147 * @param dbi debug info
2148 * @param expr the IL assume expression
2150 * we support here only some simple cases:
2155 static ir_node *handle_assume_compare(dbg_info *dbi,
2156 const binary_expression_t *expression)
2158 expression_t *op1 = expression->left;
2159 expression_t *op2 = expression->right;
2160 entity_t *var2, *var = NULL;
2161 ir_node *res = NULL;
2162 ir_relation relation = get_relation(expression->base.kind);
2164 if (is_local_variable(op1) && is_local_variable(op2)) {
2165 var = op1->reference.entity;
2166 var2 = op2->reference.entity;
2168 type_t *const type = skip_typeref(var->declaration.type);
2169 ir_mode *const mode = get_ir_mode_storage(type);
2171 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2172 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2174 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2175 set_value(var2->variable.v.value_number, res);
2177 res = new_d_Confirm(dbi, irn1, irn2, relation);
2178 set_value(var->variable.v.value_number, res);
2183 expression_t *con = NULL;
2184 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2185 var = op1->reference.entity;
2187 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2188 relation = get_inversed_relation(relation);
2189 var = op2->reference.entity;
2194 type_t *const type = skip_typeref(var->declaration.type);
2195 ir_mode *const mode = get_ir_mode_storage(type);
2197 res = get_value(var->variable.v.value_number, mode);
2198 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2199 set_value(var->variable.v.value_number, res);
2205 * Handle the assume optimizer hint.
2207 * @param dbi debug info
2208 * @param expr the IL assume expression
2210 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2212 switch(expression->kind) {
2213 case EXPR_BINARY_EQUAL:
2214 case EXPR_BINARY_NOTEQUAL:
2215 case EXPR_BINARY_LESS:
2216 case EXPR_BINARY_LESSEQUAL:
2217 case EXPR_BINARY_GREATER:
2218 case EXPR_BINARY_GREATEREQUAL:
2219 return handle_assume_compare(dbi, &expression->binary);
2225 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2226 type_t *from_type, type_t *type)
2228 type = skip_typeref(type);
2229 if (is_type_void(type)) {
2230 /* make sure firm type is constructed */
2231 (void) get_ir_type(type);
2234 if (!is_type_scalar(type)) {
2235 /* make sure firm type is constructed */
2236 (void) get_ir_type(type);
2240 from_type = skip_typeref(from_type);
2241 ir_mode *mode = get_ir_mode_storage(type);
2242 /* check for conversion from / to __based types */
2243 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2244 const variable_t *from_var = from_type->pointer.base_variable;
2245 const variable_t *to_var = type->pointer.base_variable;
2246 if (from_var != to_var) {
2247 if (from_var != NULL) {
2248 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2249 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2250 value_node = new_d_Add(dbgi, value_node, base, mode);
2252 if (to_var != NULL) {
2253 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2254 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2255 value_node = new_d_Sub(dbgi, value_node, base, mode);
2260 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2261 /* bool adjustments (we save a mode_Bu, but have to temporarily
2262 * convert to mode_b so we only get a 0/1 value */
2263 value_node = create_conv(dbgi, value_node, mode_b);
2266 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2267 ir_node *node = create_conv(dbgi, value_node, mode);
2268 node = create_conv(dbgi, node, mode_arith);
2273 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2275 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2276 type_t *type = skip_typeref(expression->base.type);
2278 const expression_t *value = expression->value;
2280 switch(expression->base.kind) {
2281 case EXPR_UNARY_TAKE_ADDRESS:
2282 return expression_to_addr(value);
2284 case EXPR_UNARY_NEGATE: {
2285 ir_node *value_node = expression_to_firm(value);
2286 ir_mode *mode = get_ir_mode_arithmetic(type);
2287 return new_d_Minus(dbgi, value_node, mode);
2289 case EXPR_UNARY_PLUS:
2290 return expression_to_firm(value);
2291 case EXPR_UNARY_BITWISE_NEGATE: {
2292 ir_node *value_node = expression_to_firm(value);
2293 ir_mode *mode = get_ir_mode_arithmetic(type);
2294 return new_d_Not(dbgi, value_node, mode);
2296 case EXPR_UNARY_NOT: {
2297 ir_node *value_node = _expression_to_firm(value);
2298 value_node = create_conv(dbgi, value_node, mode_b);
2299 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2302 case EXPR_UNARY_DEREFERENCE: {
2303 ir_node *value_node = expression_to_firm(value);
2304 type_t *value_type = skip_typeref(value->base.type);
2305 assert(is_type_pointer(value_type));
2307 /* check for __based */
2308 const variable_t *const base_var = value_type->pointer.base_variable;
2309 if (base_var != NULL) {
2310 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2311 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2312 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2314 type_t *points_to = value_type->pointer.points_to;
2315 return deref_address(dbgi, points_to, value_node);
2321 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
2322 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
2323 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
2324 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
2326 return create_incdec(expression, inc, pre);
2329 case EXPR_UNARY_CAST: {
2330 ir_node *value_node = expression_to_firm(value);
2331 type_t *from_type = value->base.type;
2332 return create_cast(dbgi, value_node, from_type, type);
2334 case EXPR_UNARY_ASSUME:
2335 return handle_assume(dbgi, value);
2340 panic("invalid unary expression type");
2344 * produces a 0/1 depending of the value of a mode_b node
2346 static ir_node *produce_condition_result(const expression_t *expression,
2347 ir_mode *mode, dbg_info *dbgi)
2349 jump_target true_target;
2350 jump_target false_target;
2351 init_jump_target(&true_target, NULL);
2352 init_jump_target(&false_target, NULL);
2353 create_condition_evaluation(expression, &true_target, &false_target);
2355 ir_node *val = NULL;
2356 jump_target exit_target;
2357 init_jump_target(&exit_target, NULL);
2359 if (enter_jump_target(&true_target)) {
2360 val = new_Const(get_mode_one(mode));
2361 jump_to_target(&exit_target);
2364 if (enter_jump_target(&false_target)) {
2365 ir_node *const zero = new_Const(get_mode_null(mode));
2366 jump_to_target(&exit_target);
2368 ir_node *const in[] = { val, zero };
2369 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2375 if (!enter_jump_target(&exit_target)) {
2376 set_cur_block(new_Block(0, NULL));
2377 val = new_Unknown(mode);
2382 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2383 ir_node *value, type_t *type)
2385 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2386 assert(is_type_pointer(type));
2387 pointer_type_t *const pointer_type = &type->pointer;
2388 type_t *const points_to = skip_typeref(pointer_type->points_to);
2389 ir_node * elem_size = get_type_size_node(points_to);
2390 elem_size = create_conv(dbgi, elem_size, mode);
2391 value = create_conv(dbgi, value, mode);
2392 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2396 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2397 ir_node *left, ir_node *right)
2400 type_t *type_left = skip_typeref(expression->left->base.type);
2401 type_t *type_right = skip_typeref(expression->right->base.type);
2403 expression_kind_t kind = expression->base.kind;
2406 case EXPR_BINARY_SHIFTLEFT:
2407 case EXPR_BINARY_SHIFTRIGHT:
2408 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2409 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2410 mode = get_ir_mode_arithmetic(expression->base.type);
2411 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2414 case EXPR_BINARY_SUB:
2415 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2416 const pointer_type_t *const ptr_type = &type_left->pointer;
2418 mode = get_ir_mode_arithmetic(expression->base.type);
2419 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2420 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2421 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2422 ir_node *const no_mem = new_NoMem();
2423 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2424 mode, op_pin_state_floats);
2425 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2428 case EXPR_BINARY_SUB_ASSIGN:
2429 if (is_type_pointer(type_left)) {
2430 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2431 mode = get_ir_mode_arithmetic(type_left);
2436 case EXPR_BINARY_ADD:
2437 case EXPR_BINARY_ADD_ASSIGN:
2438 if (is_type_pointer(type_left)) {
2439 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2440 mode = get_ir_mode_arithmetic(type_left);
2442 } else if (is_type_pointer(type_right)) {
2443 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2444 mode = get_ir_mode_arithmetic(type_right);
2451 mode = get_ir_mode_arithmetic(type_right);
2452 left = create_conv(dbgi, left, mode);
2457 case EXPR_BINARY_ADD_ASSIGN:
2458 case EXPR_BINARY_ADD:
2459 return new_d_Add(dbgi, left, right, mode);
2460 case EXPR_BINARY_SUB_ASSIGN:
2461 case EXPR_BINARY_SUB:
2462 return new_d_Sub(dbgi, left, right, mode);
2463 case EXPR_BINARY_MUL_ASSIGN:
2464 case EXPR_BINARY_MUL:
2465 return new_d_Mul(dbgi, left, right, mode);
2466 case EXPR_BINARY_BITWISE_AND:
2467 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2468 return new_d_And(dbgi, left, right, mode);
2469 case EXPR_BINARY_BITWISE_OR:
2470 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2471 return new_d_Or(dbgi, left, right, mode);
2472 case EXPR_BINARY_BITWISE_XOR:
2473 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2474 return new_d_Eor(dbgi, left, right, mode);
2475 case EXPR_BINARY_SHIFTLEFT:
2476 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2477 return new_d_Shl(dbgi, left, right, mode);
2478 case EXPR_BINARY_SHIFTRIGHT:
2479 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2480 if (mode_is_signed(mode)) {
2481 return new_d_Shrs(dbgi, left, right, mode);
2483 return new_d_Shr(dbgi, left, right, mode);
2485 case EXPR_BINARY_DIV:
2486 case EXPR_BINARY_DIV_ASSIGN: {
2487 ir_node *pin = new_Pin(new_NoMem());
2488 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2489 op_pin_state_floats);
2490 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2493 case EXPR_BINARY_MOD:
2494 case EXPR_BINARY_MOD_ASSIGN: {
2495 ir_node *pin = new_Pin(new_NoMem());
2496 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2497 op_pin_state_floats);
2498 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2502 panic("unexpected expression kind");
2506 static ir_node *create_lazy_op(const binary_expression_t *expression)
2508 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2509 type_t *type = skip_typeref(expression->base.type);
2510 ir_mode *mode = get_ir_mode_arithmetic(type);
2512 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2513 bool val = fold_constant_to_bool(expression->left);
2514 expression_kind_t ekind = expression->base.kind;
2515 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2516 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2518 return new_Const(get_mode_null(mode));
2522 return new_Const(get_mode_one(mode));
2526 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2527 bool valr = fold_constant_to_bool(expression->right);
2528 return create_Const_from_bool(mode, valr);
2531 return produce_condition_result(expression->right, mode, dbgi);
2534 return produce_condition_result((const expression_t*) expression, mode,
2538 static ir_node *create_assign_binop(const binary_expression_t *expression)
2540 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2541 const expression_t *left_expr = expression->left;
2542 type_t *type = skip_typeref(left_expr->base.type);
2543 ir_node *right = expression_to_firm(expression->right);
2544 ir_node *left_addr = expression_to_addr(left_expr);
2545 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2546 ir_node *result = create_op(dbgi, expression, left, right);
2548 result = create_cast(dbgi, result, expression->right->base.type, type);
2550 result = set_value_for_expression_addr(left_expr, result, left_addr);
2552 if (!is_type_compound(type)) {
2553 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2554 result = create_conv(dbgi, result, mode_arithmetic);
2559 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2561 expression_kind_t kind = expression->base.kind;
2564 case EXPR_BINARY_EQUAL:
2565 case EXPR_BINARY_NOTEQUAL:
2566 case EXPR_BINARY_LESS:
2567 case EXPR_BINARY_LESSEQUAL:
2568 case EXPR_BINARY_GREATER:
2569 case EXPR_BINARY_GREATEREQUAL:
2570 case EXPR_BINARY_ISGREATER:
2571 case EXPR_BINARY_ISGREATEREQUAL:
2572 case EXPR_BINARY_ISLESS:
2573 case EXPR_BINARY_ISLESSEQUAL:
2574 case EXPR_BINARY_ISLESSGREATER:
2575 case EXPR_BINARY_ISUNORDERED: {
2576 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2577 ir_node *left = expression_to_firm(expression->left);
2578 ir_node *right = expression_to_firm(expression->right);
2579 ir_relation relation = get_relation(kind);
2580 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2583 case EXPR_BINARY_ASSIGN: {
2584 ir_node *addr = expression_to_addr(expression->left);
2585 ir_node *right = expression_to_firm(expression->right);
2587 = set_value_for_expression_addr(expression->left, right, addr);
2589 type_t *type = skip_typeref(expression->base.type);
2590 if (!is_type_compound(type)) {
2591 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2592 res = create_conv(NULL, res, mode_arithmetic);
2596 case EXPR_BINARY_ADD:
2597 case EXPR_BINARY_SUB:
2598 case EXPR_BINARY_MUL:
2599 case EXPR_BINARY_DIV:
2600 case EXPR_BINARY_MOD:
2601 case EXPR_BINARY_BITWISE_AND:
2602 case EXPR_BINARY_BITWISE_OR:
2603 case EXPR_BINARY_BITWISE_XOR:
2604 case EXPR_BINARY_SHIFTLEFT:
2605 case EXPR_BINARY_SHIFTRIGHT:
2607 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2608 ir_node *left = expression_to_firm(expression->left);
2609 ir_node *right = expression_to_firm(expression->right);
2610 return create_op(dbgi, expression, left, right);
2612 case EXPR_BINARY_LOGICAL_AND:
2613 case EXPR_BINARY_LOGICAL_OR:
2614 return create_lazy_op(expression);
2615 case EXPR_BINARY_COMMA:
2616 /* create side effects of left side */
2617 (void) expression_to_firm(expression->left);
2618 return _expression_to_firm(expression->right);
2620 case EXPR_BINARY_ADD_ASSIGN:
2621 case EXPR_BINARY_SUB_ASSIGN:
2622 case EXPR_BINARY_MUL_ASSIGN:
2623 case EXPR_BINARY_MOD_ASSIGN:
2624 case EXPR_BINARY_DIV_ASSIGN:
2625 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2626 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2627 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2628 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2629 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2630 return create_assign_binop(expression);
2632 panic("invalid binexpr type");
2636 static ir_node *array_access_addr(const array_access_expression_t *expression)
2638 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2639 ir_node *base_addr = expression_to_firm(expression->array_ref);
2640 ir_node *offset = expression_to_firm(expression->index);
2641 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2642 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2643 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2648 static ir_node *array_access_to_firm(
2649 const array_access_expression_t *expression)
2651 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2652 ir_node *addr = array_access_addr(expression);
2653 type_t *type = revert_automatic_type_conversion(
2654 (const expression_t*) expression);
2655 type = skip_typeref(type);
2657 return deref_address(dbgi, type, addr);
2660 static long get_offsetof_offset(const offsetof_expression_t *expression)
2662 type_t *orig_type = expression->type;
2665 designator_t *designator = expression->designator;
2666 for ( ; designator != NULL; designator = designator->next) {
2667 type_t *type = skip_typeref(orig_type);
2668 /* be sure the type is constructed */
2669 (void) get_ir_type(type);
2671 if (designator->symbol != NULL) {
2672 assert(is_type_compound(type));
2673 symbol_t *symbol = designator->symbol;
2675 compound_t *compound = type->compound.compound;
2676 entity_t *iter = compound->members.entities;
2677 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2679 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2680 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2681 offset += get_entity_offset(iter->compound_member.entity);
2683 orig_type = iter->declaration.type;
2685 expression_t *array_index = designator->array_index;
2686 assert(designator->array_index != NULL);
2687 assert(is_type_array(type));
2689 long index = fold_constant_to_int(array_index);
2690 ir_type *arr_type = get_ir_type(type);
2691 ir_type *elem_type = get_array_element_type(arr_type);
2692 long elem_size = get_type_size_bytes(elem_type);
2694 offset += index * elem_size;
2696 orig_type = type->array.element_type;
2703 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2705 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2706 long offset = get_offsetof_offset(expression);
2707 ir_tarval *tv = new_tarval_from_long(offset, mode);
2708 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2710 return new_d_Const(dbgi, tv);
2713 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2714 ir_entity *entity, type_t *type);
2715 static ir_initializer_t *create_ir_initializer(
2716 const initializer_t *initializer, type_t *type);
2718 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2719 initializer_t *initializer,
2722 /* create the ir_initializer */
2723 PUSH_IRG(get_const_code_irg());
2724 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2727 ident *const id = id_unique("initializer.%u");
2728 ir_type *const irtype = get_ir_type(type);
2729 ir_type *const global_type = get_glob_type();
2730 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2731 set_entity_ld_ident(entity, id);
2732 set_entity_visibility(entity, ir_visibility_private);
2733 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2734 set_entity_initializer(entity, irinitializer);
2738 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2740 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2741 type_t *type = expression->type;
2742 initializer_t *initializer = expression->initializer;
2744 if (expression->global_scope ||
2745 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2746 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2747 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2748 return create_symconst(dbgi, entity);
2750 /* create an entity on the stack */
2751 ident *const id = id_unique("CompLit.%u");
2752 ir_type *const irtype = get_ir_type(type);
2753 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2755 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2756 set_entity_ld_ident(entity, id);
2758 /* create initialisation code */
2759 create_local_initializer(initializer, dbgi, entity, type);
2761 /* create a sel for the compound literal address */
2762 ir_node *frame = get_irg_frame(current_ir_graph);
2763 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2768 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2770 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2771 type_t *const type = expr->type;
2772 ir_node *const addr = compound_literal_addr(expr);
2773 return deref_address(dbgi, type, addr);
2777 * Transform a sizeof expression into Firm code.
2779 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2781 type_t *const type = skip_typeref(expression->type);
2782 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2783 if (is_type_array(type) && type->array.is_vla
2784 && expression->tp_expression != NULL) {
2785 expression_to_firm(expression->tp_expression);
2788 return get_type_size_node(type);
2791 static entity_t *get_expression_entity(const expression_t *expression)
2793 if (expression->kind != EXPR_REFERENCE)
2796 return expression->reference.entity;
2799 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2801 switch(entity->kind) {
2802 case DECLARATION_KIND_CASES:
2803 return entity->declaration.alignment;
2806 return entity->compound.alignment;
2807 case ENTITY_TYPEDEF:
2808 return entity->typedefe.alignment;
2816 * Transform an alignof expression into Firm code.
2818 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2820 unsigned alignment = 0;
2822 const expression_t *tp_expression = expression->tp_expression;
2823 if (tp_expression != NULL) {
2824 entity_t *entity = get_expression_entity(tp_expression);
2825 if (entity != NULL) {
2826 alignment = get_cparser_entity_alignment(entity);
2830 if (alignment == 0) {
2831 type_t *type = expression->type;
2832 alignment = get_type_alignment(type);
2835 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2836 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2837 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2838 return new_d_Const(dbgi, tv);
2841 static void init_ir_types(void);
2843 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2845 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2847 bool constant_folding_old = constant_folding;
2848 constant_folding = true;
2849 int old_optimize = get_optimize();
2850 int old_constant_folding = get_opt_constant_folding();
2852 set_opt_constant_folding(1);
2856 PUSH_IRG(get_const_code_irg());
2857 ir_node *const cnst = expression_to_firm(expression);
2860 set_optimize(old_optimize);
2861 set_opt_constant_folding(old_constant_folding);
2862 constant_folding = constant_folding_old;
2864 if (!is_Const(cnst))
2865 panic("couldn't fold constant");
2866 return get_Const_tarval(cnst);
2869 /* this function is only used in parser.c, but it relies on libfirm functionality */
2870 bool constant_is_negative(const expression_t *expression)
2872 ir_tarval *tv = fold_constant_to_tarval(expression);
2873 return tarval_is_negative(tv);
2876 long fold_constant_to_int(const expression_t *expression)
2878 ir_tarval *tv = fold_constant_to_tarval(expression);
2879 if (!tarval_is_long(tv)) {
2880 panic("result of constant folding is not integer");
2883 return get_tarval_long(tv);
2886 bool fold_constant_to_bool(const expression_t *expression)
2888 ir_tarval *tv = fold_constant_to_tarval(expression);
2889 return !tarval_is_null(tv);
2892 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2894 jump_target true_target;
2895 jump_target false_target;
2896 init_jump_target(&true_target, NULL);
2897 init_jump_target(&false_target, NULL);
2898 ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2900 ir_node *val = NULL;
2901 jump_target exit_target;
2902 init_jump_target(&exit_target, NULL);
2904 if (enter_jump_target(&true_target)) {
2905 if (expression->true_expression) {
2906 val = expression_to_firm(expression->true_expression);
2907 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2910 /* Condition ended with a short circuit (&&, ||, !) operation or a
2911 * comparison. Generate a "1" as value for the true branch. */
2912 val = new_Const(get_mode_one(mode_Is));
2914 jump_to_target(&exit_target);
2917 if (enter_jump_target(&false_target)) {
2918 ir_node *const false_val = expression_to_firm(expression->false_expression);
2919 jump_to_target(&exit_target);
2921 ir_node *const in[] = { val, false_val };
2922 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2923 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2929 if (!enter_jump_target(&exit_target)) {
2930 set_cur_block(new_Block(0, NULL));
2931 type_t *const type = skip_typeref(expression->base.type);
2932 if (!is_type_void(type))
2933 val = new_Unknown(get_ir_mode_arithmetic(type));
2939 * Returns an IR-node representing the address of a field.
2941 static ir_node *select_addr(const select_expression_t *expression)
2943 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2945 construct_select_compound(expression);
2947 ir_node *compound_addr = expression_to_firm(expression->compound);
2949 entity_t *entry = expression->compound_entry;
2950 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2951 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2953 if (constant_folding) {
2954 ir_mode *mode = get_irn_mode(compound_addr);
2955 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2956 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2957 return new_d_Add(dbgi, compound_addr, ofs, mode);
2959 ir_entity *irentity = entry->compound_member.entity;
2960 assert(irentity != NULL);
2961 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2965 static ir_node *select_to_firm(const select_expression_t *expression)
2967 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2968 ir_node *addr = select_addr(expression);
2969 type_t *type = revert_automatic_type_conversion(
2970 (const expression_t*) expression);
2971 type = skip_typeref(type);
2973 entity_t *entry = expression->compound_entry;
2974 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2976 if (entry->compound_member.bitfield) {
2977 return bitfield_extract_to_firm(expression, addr);
2980 return deref_address(dbgi, type, addr);
2983 /* Values returned by __builtin_classify_type. */
2984 typedef enum gcc_type_class
2990 enumeral_type_class,
2993 reference_type_class,
2997 function_type_class,
3008 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3010 type_t *type = expr->type_expression->base.type;
3012 /* FIXME gcc returns different values depending on whether compiling C or C++
3013 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3016 type = skip_typeref(type);
3017 switch (type->kind) {
3019 const atomic_type_t *const atomic_type = &type->atomic;
3020 switch (atomic_type->akind) {
3021 /* gcc cannot do that */
3022 case ATOMIC_TYPE_VOID:
3023 tc = void_type_class;
3026 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3027 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3028 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3029 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3030 case ATOMIC_TYPE_SHORT:
3031 case ATOMIC_TYPE_USHORT:
3032 case ATOMIC_TYPE_INT:
3033 case ATOMIC_TYPE_UINT:
3034 case ATOMIC_TYPE_LONG:
3035 case ATOMIC_TYPE_ULONG:
3036 case ATOMIC_TYPE_LONGLONG:
3037 case ATOMIC_TYPE_ULONGLONG:
3038 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3039 tc = integer_type_class;
3042 case ATOMIC_TYPE_FLOAT:
3043 case ATOMIC_TYPE_DOUBLE:
3044 case ATOMIC_TYPE_LONG_DOUBLE:
3045 tc = real_type_class;
3048 panic("Unexpected atomic type.");
3051 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3052 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3053 case TYPE_ARRAY: /* gcc handles this as pointer */
3054 case TYPE_FUNCTION: /* gcc handles this as pointer */
3055 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3056 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3057 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3059 /* gcc handles this as integer */
3060 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3062 /* gcc classifies the referenced type */
3063 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3065 /* typedef/typeof should be skipped already */
3071 panic("unexpected type.");
3075 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3076 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3077 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3078 return new_d_Const(dbgi, tv);
3081 static ir_node *function_name_to_firm(
3082 const funcname_expression_t *const expr)
3084 switch(expr->kind) {
3085 case FUNCNAME_FUNCTION:
3086 case FUNCNAME_PRETTY_FUNCTION:
3087 case FUNCNAME_FUNCDNAME:
3088 if (current_function_name == NULL) {
3089 position_t const *const src_pos = &expr->base.pos;
3090 char const *const name = current_function_entity->base.symbol->string;
3091 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3092 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3094 return current_function_name;
3095 case FUNCNAME_FUNCSIG:
3096 if (current_funcsig == NULL) {
3097 position_t const *const src_pos = &expr->base.pos;
3098 ir_entity *const ent = get_irg_entity(current_ir_graph);
3099 char const *const name = get_entity_ld_name(ent);
3100 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3101 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3103 return current_funcsig;
3105 panic("Unsupported function name");
3108 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3110 statement_t *statement = expr->statement;
3112 assert(statement->kind == STATEMENT_COMPOUND);
3113 return compound_statement_to_firm(&statement->compound);
3116 static ir_node *va_start_expression_to_firm(
3117 const va_start_expression_t *const expr)
3119 ir_entity *param_ent = current_vararg_entity;
3120 if (param_ent == NULL) {
3121 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3122 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3123 ir_type *const param_type = get_unknown_type();
3124 param_ent = new_parameter_entity(frame_type, n, param_type);
3125 current_vararg_entity = param_ent;
3128 ir_node *const frame = get_irg_frame(current_ir_graph);
3129 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3130 ir_node *const no_mem = new_NoMem();
3131 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3133 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3138 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3140 type_t *const type = expr->base.type;
3141 expression_t *const ap_expr = expr->ap;
3142 ir_node *const ap_addr = expression_to_addr(ap_expr);
3143 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3144 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3145 ir_node *const res = deref_address(dbgi, type, ap);
3147 ir_node *const cnst = get_type_size_node(expr->base.type);
3148 ir_mode *const mode = get_irn_mode(cnst);
3149 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3150 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3151 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3152 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3153 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3155 set_value_for_expression_addr(ap_expr, add, ap_addr);
3161 * Generate Firm for a va_copy expression.
3163 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3165 ir_node *const src = expression_to_firm(expr->src);
3166 set_value_for_expression_addr(expr->dst, src, NULL);
3170 static ir_node *dereference_addr(const unary_expression_t *const expression)
3172 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3173 return expression_to_firm(expression->value);
3177 * Returns a IR-node representing an lvalue of the given expression.
3179 static ir_node *expression_to_addr(const expression_t *expression)
3181 switch(expression->kind) {
3182 case EXPR_ARRAY_ACCESS:
3183 return array_access_addr(&expression->array_access);
3184 case EXPR_COMPOUND_LITERAL:
3185 return compound_literal_addr(&expression->compound_literal);
3186 case EXPR_REFERENCE:
3187 return reference_addr(&expression->reference);
3189 return select_addr(&expression->select);
3190 case EXPR_UNARY_DEREFERENCE:
3191 return dereference_addr(&expression->unary);
3195 panic("trying to get address of non-lvalue");
3198 static ir_node *builtin_constant_to_firm(
3199 const builtin_constant_expression_t *expression)
3201 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3202 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3203 return create_Const_from_bool(mode, v);
3206 static ir_node *builtin_types_compatible_to_firm(
3207 const builtin_types_compatible_expression_t *expression)
3209 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3210 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3211 bool const value = types_compatible(left, right);
3212 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3213 return create_Const_from_bool(mode, value);
3216 static void prepare_label_target(label_t *const label)
3218 if (label->address_taken && !label->indirect_block) {
3219 ir_node *const iblock = new_immBlock();
3220 label->indirect_block = iblock;
3221 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3222 jump_from_block_to_target(&label->target, iblock);
3227 * Pointer to a label. This is used for the
3228 * GNU address-of-label extension.
3230 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3232 /* Beware: Might be called from create initializer with current_ir_graph
3233 * set to const_code_irg. */
3234 PUSH_IRG(current_function);
3235 prepare_label_target(label->label);
3238 symconst_symbol value;
3239 value.entity_p = create_Block_entity(label->label->indirect_block);
3240 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3241 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3245 * creates firm nodes for an expression. The difference between this function
3246 * and expression_to_firm is, that this version might produce mode_b nodes
3247 * instead of mode_Is.
3249 static ir_node *_expression_to_firm(expression_t const *const expr)
3252 if (!constant_folding) {
3253 assert(!expr->base.transformed);
3254 ((expression_t*)expr)->base.transformed = true;
3258 switch (expr->kind) {
3259 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3260 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3261 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3262 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3263 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3264 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3265 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3266 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3267 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3268 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3269 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3270 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3271 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3272 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3273 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3274 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3275 case EXPR_SELECT: return select_to_firm( &expr->select);
3276 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3277 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3278 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3279 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3280 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3281 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3283 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.pos, "str.%u", &expr->string_literal.value);
3285 case EXPR_ERROR: break;
3287 panic("invalid expression");
3291 * Check if a given expression is a GNU __builtin_expect() call.
3293 static bool is_builtin_expect(const expression_t *expression)
3295 if (expression->kind != EXPR_CALL)
3298 expression_t *function = expression->call.function;
3299 if (function->kind != EXPR_REFERENCE)
3301 reference_expression_t *ref = &function->reference;
3302 if (ref->entity->kind != ENTITY_FUNCTION ||
3303 ref->entity->function.btk != BUILTIN_EXPECT)
3309 static bool produces_mode_b(const expression_t *expression)
3311 switch (expression->kind) {
3312 case EXPR_BINARY_EQUAL:
3313 case EXPR_BINARY_NOTEQUAL:
3314 case EXPR_BINARY_LESS:
3315 case EXPR_BINARY_LESSEQUAL:
3316 case EXPR_BINARY_GREATER:
3317 case EXPR_BINARY_GREATEREQUAL:
3318 case EXPR_BINARY_ISGREATER:
3319 case EXPR_BINARY_ISGREATEREQUAL:
3320 case EXPR_BINARY_ISLESS:
3321 case EXPR_BINARY_ISLESSEQUAL:
3322 case EXPR_BINARY_ISLESSGREATER:
3323 case EXPR_BINARY_ISUNORDERED:
3324 case EXPR_UNARY_NOT:
3328 if (is_builtin_expect(expression)) {
3329 expression_t *argument = expression->call.arguments->expression;
3330 return produces_mode_b(argument);
3333 case EXPR_BINARY_COMMA:
3334 return produces_mode_b(expression->binary.right);
3341 static ir_node *expression_to_firm(const expression_t *expression)
3343 if (!produces_mode_b(expression)) {
3344 ir_node *res = _expression_to_firm(expression);
3345 assert(res == NULL || get_irn_mode(res) != mode_b);
3349 /* we have to produce a 0/1 from the mode_b expression */
3350 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3351 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3352 return produce_condition_result(expression, mode, dbgi);
3356 * create a short-circuit expression evaluation that tries to construct
3357 * efficient control flow structures for &&, || and ! expressions
3359 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3361 switch(expression->kind) {
3362 case EXPR_UNARY_NOT: {
3363 const unary_expression_t *unary_expression = &expression->unary;
3364 create_condition_evaluation(unary_expression->value, false_target, true_target);
3367 case EXPR_BINARY_LOGICAL_AND: {
3368 jump_target extra_target;
3369 init_jump_target(&extra_target, NULL);
3370 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3371 if (enter_jump_target(&extra_target))
3372 create_condition_evaluation(expression->binary.right, true_target, false_target);
3375 case EXPR_BINARY_LOGICAL_OR: {
3376 jump_target extra_target;
3377 init_jump_target(&extra_target, NULL);
3378 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3379 if (enter_jump_target(&extra_target))
3380 create_condition_evaluation(expression->binary.right, true_target, false_target);
3387 ir_node *cond_expr = _expression_to_firm(expression);
3388 if (is_Const(cond_expr)) {
3389 if (tarval_is_null(get_Const_tarval(cond_expr))) {
3390 jump_to_target(false_target);
3392 jump_to_target(true_target);
3395 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3396 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3397 ir_node *cond = new_d_Cond(dbgi, condition);
3398 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3399 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3401 /* set branch prediction info based on __builtin_expect */
3402 if (is_builtin_expect(expression) && is_Cond(cond)) {
3403 call_argument_t *argument = expression->call.arguments->next;
3404 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3405 bool const cnst = fold_constant_to_bool(argument->expression);
3406 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3407 set_Cond_jmp_pred(cond, pred);
3411 add_pred_to_jump_target(true_target, true_proj);
3412 add_pred_to_jump_target(false_target, false_proj);
3414 set_unreachable_now();
3418 static void create_variable_entity(entity_t *variable,
3419 declaration_kind_t declaration_kind,
3420 ir_type *parent_type)
3422 assert(variable->kind == ENTITY_VARIABLE);
3423 type_t *type = skip_typeref(variable->declaration.type);
3425 ident *const id = new_id_from_str(variable->base.symbol->string);
3426 ir_type *const irtype = get_ir_type(type);
3427 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
3428 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3429 unsigned alignment = variable->declaration.alignment;
3431 set_entity_alignment(irentity, alignment);
3433 handle_decl_modifiers(irentity, variable);
3435 variable->declaration.kind = (unsigned char) declaration_kind;
3436 variable->variable.v.entity = irentity;
3437 set_entity_ld_ident(irentity, create_ld_ident(variable));
3439 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3440 set_entity_volatility(irentity, volatility_is_volatile);
3445 typedef struct type_path_entry_t type_path_entry_t;
3446 struct type_path_entry_t {
3448 ir_initializer_t *initializer;
3450 entity_t *compound_entry;
3453 typedef struct type_path_t type_path_t;
3454 struct type_path_t {
3455 type_path_entry_t *path;
3460 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3462 size_t len = ARR_LEN(path->path);
3464 for (size_t i = 0; i < len; ++i) {
3465 const type_path_entry_t *entry = & path->path[i];
3467 type_t *type = skip_typeref(entry->type);
3468 if (is_type_compound(type)) {
3469 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3470 } else if (is_type_array(type)) {
3471 fprintf(stderr, "[%u]", (unsigned) entry->index);
3473 fprintf(stderr, "-INVALID-");
3476 fprintf(stderr, " (");
3477 print_type(path->top_type);
3478 fprintf(stderr, ")");
3481 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3483 size_t len = ARR_LEN(path->path);
3485 return & path->path[len-1];
3488 static type_path_entry_t *append_to_type_path(type_path_t *path)
3490 size_t len = ARR_LEN(path->path);
3491 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3493 type_path_entry_t *result = & path->path[len];
3494 memset(result, 0, sizeof(result[0]));
3498 static size_t get_compound_member_count(const compound_type_t *type)
3500 compound_t *compound = type->compound;
3501 size_t n_members = 0;
3502 entity_t *member = compound->members.entities;
3503 for ( ; member != NULL; member = member->base.next) {
3510 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3512 type_t *orig_top_type = path->top_type;
3513 type_t *top_type = skip_typeref(orig_top_type);
3515 assert(is_type_compound(top_type) || is_type_array(top_type));
3517 if (ARR_LEN(path->path) == 0) {
3520 type_path_entry_t *top = get_type_path_top(path);
3521 ir_initializer_t *initializer = top->initializer;
3522 return get_initializer_compound_value(initializer, top->index);
3526 static void descend_into_subtype(type_path_t *path)
3528 type_t *orig_top_type = path->top_type;
3529 type_t *top_type = skip_typeref(orig_top_type);
3531 assert(is_type_compound(top_type) || is_type_array(top_type));
3533 ir_initializer_t *initializer = get_initializer_entry(path);
3535 type_path_entry_t *top = append_to_type_path(path);
3536 top->type = top_type;
3540 if (is_type_compound(top_type)) {
3541 compound_t *const compound = top_type->compound.compound;
3542 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3544 top->compound_entry = entry;
3546 len = get_compound_member_count(&top_type->compound);
3547 if (entry != NULL) {
3548 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3549 path->top_type = entry->declaration.type;
3552 assert(is_type_array(top_type));
3553 assert(top_type->array.size > 0);
3556 path->top_type = top_type->array.element_type;
3557 len = top_type->array.size;
3559 if (initializer == NULL
3560 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3561 initializer = create_initializer_compound(len);
3562 /* we have to set the entry at the 2nd latest path entry... */
3563 size_t path_len = ARR_LEN(path->path);
3564 assert(path_len >= 1);
3566 type_path_entry_t *entry = & path->path[path_len-2];
3567 ir_initializer_t *tinitializer = entry->initializer;
3568 set_initializer_compound_value(tinitializer, entry->index,
3572 top->initializer = initializer;
3575 static void ascend_from_subtype(type_path_t *path)
3577 type_path_entry_t *top = get_type_path_top(path);
3579 path->top_type = top->type;
3581 size_t len = ARR_LEN(path->path);
3582 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3585 static void walk_designator(type_path_t *path, const designator_t *designator)
3587 /* designators start at current object type */
3588 ARR_RESIZE(type_path_entry_t, path->path, 1);
3590 for ( ; designator != NULL; designator = designator->next) {
3591 type_path_entry_t *top = get_type_path_top(path);
3592 type_t *orig_type = top->type;
3593 type_t *type = skip_typeref(orig_type);
3595 if (designator->symbol != NULL) {
3596 assert(is_type_compound(type));
3598 symbol_t *symbol = designator->symbol;
3600 compound_t *compound = type->compound.compound;
3601 entity_t *iter = compound->members.entities;
3602 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3603 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3605 /* revert previous initialisations of other union elements */
3606 if (type->kind == TYPE_COMPOUND_UNION) {
3607 ir_initializer_t *initializer = top->initializer;
3608 if (initializer != NULL
3609 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3610 /* are we writing to a new element? */
3611 ir_initializer_t *oldi
3612 = get_initializer_compound_value(initializer, index);
3613 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3614 /* clear initializer */
3616 = get_initializer_compound_n_entries(initializer);
3617 ir_initializer_t *nulli = get_initializer_null();
3618 for (size_t i = 0; i < len; ++i) {
3619 set_initializer_compound_value(initializer, i,
3626 top->type = orig_type;
3627 top->compound_entry = iter;
3629 orig_type = iter->declaration.type;
3631 expression_t *array_index = designator->array_index;
3632 assert(is_type_array(type));
3634 long index = fold_constant_to_int(array_index);
3635 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3637 top->type = orig_type;
3638 top->index = (size_t) index;
3639 orig_type = type->array.element_type;
3641 path->top_type = orig_type;
3643 if (designator->next != NULL) {
3644 descend_into_subtype(path);
3648 path->invalid = false;
3651 static void advance_current_object(type_path_t *path)
3653 if (path->invalid) {
3654 /* TODO: handle this... */
3655 panic("invalid initializer (excessive elements)");
3658 type_path_entry_t *top = get_type_path_top(path);
3660 type_t *type = skip_typeref(top->type);
3661 if (is_type_union(type)) {
3662 /* only the first element is initialized in unions */
3663 top->compound_entry = NULL;
3664 } else if (is_type_struct(type)) {
3665 entity_t *entry = top->compound_entry;
3668 entry = skip_unnamed_bitfields(entry->base.next);
3669 top->compound_entry = entry;
3670 if (entry != NULL) {
3671 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3672 path->top_type = entry->declaration.type;
3676 assert(is_type_array(type));
3679 if (!type->array.size_constant || top->index < type->array.size) {
3684 /* we're past the last member of the current sub-aggregate, try if we
3685 * can ascend in the type hierarchy and continue with another subobject */
3686 size_t len = ARR_LEN(path->path);
3689 ascend_from_subtype(path);
3690 advance_current_object(path);
3692 path->invalid = true;
3697 static ir_initializer_t *create_ir_initializer_value(
3698 const initializer_value_t *initializer)
3700 expression_t *expr = initializer->value;
3701 type_t *type = skip_typeref(expr->base.type);
3703 if (is_type_compound(type)) {
3704 if (expr->kind == EXPR_UNARY_CAST) {
3705 expr = expr->unary.value;
3706 type = skip_typeref(expr->base.type);
3708 /* must be a compound literal... */
3709 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3710 return create_ir_initializer(expr->compound_literal.initializer,
3715 ir_node *value = expression_to_firm(expr);
3716 value = conv_to_storage_type(NULL, value, type);
3717 return create_initializer_const(value);
3720 /** Tests whether type can be initialized by a string constant */
3721 static bool is_string_type(type_t *type)
3723 if (!is_type_array(type))
3726 type_t *const inner = skip_typeref(type->array.element_type);
3727 return is_type_integer(inner);
3730 static ir_initializer_t *create_ir_initializer_list(
3731 const initializer_list_t *initializer, type_t *type)
3734 memset(&path, 0, sizeof(path));
3735 path.top_type = type;
3736 path.path = NEW_ARR_F(type_path_entry_t, 0);
3738 descend_into_subtype(&path);
3740 for (size_t i = 0; i < initializer->len; ++i) {
3741 const initializer_t *sub_initializer = initializer->initializers[i];
3743 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3744 walk_designator(&path, sub_initializer->designator.designator);
3748 if (sub_initializer->kind == INITIALIZER_VALUE) {
3749 const expression_t *expr = sub_initializer->value.value;
3750 const type_t *expr_type = skip_typeref(expr->base.type);
3751 /* we might have to descend into types until the types match */
3753 type_t *orig_top_type = path.top_type;
3754 type_t *top_type = skip_typeref(orig_top_type);
3756 if (types_compatible(top_type, expr_type))
3758 descend_into_subtype(&path);
3760 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3761 /* we might have to descend into types until we're at a scalar
3764 type_t *orig_top_type = path.top_type;
3765 type_t *top_type = skip_typeref(orig_top_type);
3767 if (is_string_type(top_type))
3769 descend_into_subtype(&path);
3773 ir_initializer_t *sub_irinitializer
3774 = create_ir_initializer(sub_initializer, path.top_type);
3776 size_t path_len = ARR_LEN(path.path);
3777 assert(path_len >= 1);
3778 type_path_entry_t *entry = & path.path[path_len-1];
3779 ir_initializer_t *tinitializer = entry->initializer;
3780 set_initializer_compound_value(tinitializer, entry->index,
3783 advance_current_object(&path);
3786 assert(ARR_LEN(path.path) >= 1);
3787 ir_initializer_t *result = path.path[0].initializer;
3788 DEL_ARR_F(path.path);
3793 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3795 type = skip_typeref(type);
3797 assert(type->kind == TYPE_ARRAY);
3798 assert(type->array.size_constant);
3799 string_literal_expression_t const *const str = get_init_string(init);
3800 size_t const str_len = str->value.size;
3801 size_t const arr_len = type->array.size;
3802 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3803 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3804 char const * p = str->value.begin;
3805 switch (str->value.encoding) {
3806 case STRING_ENCODING_CHAR:
3807 case STRING_ENCODING_UTF8:
3808 for (size_t i = 0; i != arr_len; ++i) {
3809 char const c = i < str_len ? *p++ : 0;
3810 ir_tarval *const tv = new_tarval_from_long(c, mode);
3811 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3812 set_initializer_compound_value(irinit, i, tvinit);
3816 case STRING_ENCODING_CHAR16:
3817 case STRING_ENCODING_CHAR32:
3818 case STRING_ENCODING_WIDE:
3819 for (size_t i = 0; i != arr_len; ++i) {
3820 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3821 ir_tarval *const tv = new_tarval_from_long(c, mode);
3822 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3823 set_initializer_compound_value(irinit, i, tvinit);
3831 static ir_initializer_t *create_ir_initializer(
3832 const initializer_t *initializer, type_t *type)
3834 switch(initializer->kind) {
3835 case INITIALIZER_STRING:
3836 return create_ir_initializer_string(initializer, type);
3838 case INITIALIZER_LIST:
3839 return create_ir_initializer_list(&initializer->list, type);
3841 case INITIALIZER_VALUE:
3842 return create_ir_initializer_value(&initializer->value);
3844 case INITIALIZER_DESIGNATOR:
3845 panic("unexpected designator initializer");
3847 panic("unknown initializer");
3850 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3851 * are elements [...] the remainder of the aggregate shall be initialized
3852 * implicitly the same as objects that have static storage duration. */
3853 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3856 /* for unions we must NOT do anything for null initializers */
3857 ir_type *owner = get_entity_owner(entity);
3858 if (is_Union_type(owner)) {
3862 ir_type *ent_type = get_entity_type(entity);
3863 /* create sub-initializers for a compound type */
3864 if (is_compound_type(ent_type)) {
3865 unsigned n_members = get_compound_n_members(ent_type);
3866 for (unsigned n = 0; n < n_members; ++n) {
3867 ir_entity *member = get_compound_member(ent_type, n);
3868 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3870 create_dynamic_null_initializer(member, dbgi, addr);
3874 if (is_Array_type(ent_type)) {
3875 assert(has_array_upper_bound(ent_type, 0));
3876 long n = get_array_upper_bound_int(ent_type, 0);
3877 for (long i = 0; i < n; ++i) {
3878 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3879 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3880 ir_node *cnst = new_d_Const(dbgi, index_tv);
3881 ir_node *in[1] = { cnst };
3882 ir_entity *arrent = get_array_element_entity(ent_type);
3883 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3885 create_dynamic_null_initializer(arrent, dbgi, addr);
3890 ir_mode *value_mode = get_type_mode(ent_type);
3891 ir_node *node = new_Const(get_mode_null(value_mode));
3893 /* is it a bitfield type? */
3894 if (is_Primitive_type(ent_type) &&
3895 get_primitive_base_type(ent_type) != NULL) {
3896 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3900 ir_node *mem = get_store();
3901 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3902 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3906 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3907 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3909 switch(get_initializer_kind(initializer)) {
3910 case IR_INITIALIZER_NULL:
3911 create_dynamic_null_initializer(entity, dbgi, base_addr);
3913 case IR_INITIALIZER_CONST: {
3914 ir_node *node = get_initializer_const_value(initializer);
3915 ir_type *ent_type = get_entity_type(entity);
3917 /* is it a bitfield type? */
3918 if (is_Primitive_type(ent_type) &&
3919 get_primitive_base_type(ent_type) != NULL) {
3920 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3924 ir_node *mem = get_store();
3926 if (is_compound_type(ent_type)) {
3927 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3928 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3930 assert(get_type_mode(type) == get_irn_mode(node));
3931 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3932 new_mem = new_Proj(store, mode_M, pn_Store_M);
3937 case IR_INITIALIZER_TARVAL: {
3938 ir_tarval *tv = get_initializer_tarval_value(initializer);
3939 ir_node *cnst = new_d_Const(dbgi, tv);
3940 ir_type *ent_type = get_entity_type(entity);
3942 /* is it a bitfield type? */
3943 if (is_Primitive_type(ent_type) &&
3944 get_primitive_base_type(ent_type) != NULL) {
3945 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3949 assert(get_type_mode(type) == get_tarval_mode(tv));
3950 ir_node *mem = get_store();
3951 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3952 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3956 case IR_INITIALIZER_COMPOUND: {
3957 assert(is_compound_type(type) || is_Array_type(type));
3959 if (is_Array_type(type)) {
3960 assert(has_array_upper_bound(type, 0));
3961 n_members = get_array_upper_bound_int(type, 0);
3963 n_members = get_compound_n_members(type);
3966 if (get_initializer_compound_n_entries(initializer)
3967 != (unsigned) n_members)
3968 panic("initializer doesn't match compound type");
3970 for (int i = 0; i < n_members; ++i) {
3973 ir_entity *sub_entity;
3974 if (is_Array_type(type)) {
3975 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3976 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3977 ir_node *cnst = new_d_Const(dbgi, index_tv);
3978 ir_node *in[1] = { cnst };
3979 irtype = get_array_element_type(type);
3980 sub_entity = get_array_element_entity(type);
3981 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3984 sub_entity = get_compound_member(type, i);
3985 irtype = get_entity_type(sub_entity);
3986 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3990 ir_initializer_t *sub_init
3991 = get_initializer_compound_value(initializer, i);
3993 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4000 panic("invalid ir_initializer");
4003 static void create_dynamic_initializer(ir_initializer_t *initializer,
4004 dbg_info *dbgi, ir_entity *entity)
4006 ir_node *frame = get_irg_frame(current_ir_graph);
4007 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4008 ir_type *type = get_entity_type(entity);
4010 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4013 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4014 ir_entity *entity, type_t *type)
4016 ir_node *memory = get_store();
4017 ir_node *nomem = new_NoMem();
4018 ir_node *frame = get_irg_frame(current_ir_graph);
4019 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4021 if (initializer->kind == INITIALIZER_VALUE) {
4022 initializer_value_t *initializer_value = &initializer->value;
4024 ir_node *value = expression_to_firm(initializer_value->value);
4025 type = skip_typeref(type);
4026 assign_value(dbgi, addr, type, value);
4030 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4031 ir_initializer_t *irinitializer
4032 = create_ir_initializer(initializer, type);
4034 create_dynamic_initializer(irinitializer, dbgi, entity);
4038 /* create a "template" entity which is copied to the entity on the stack */
4039 ir_entity *const init_entity
4040 = create_initializer_entity(dbgi, initializer, type);
4041 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4042 ir_type *const irtype = get_ir_type(type);
4043 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4045 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4046 set_store(copyb_mem);
4049 static void create_initializer_local_variable_entity(entity_t *entity)
4051 assert(entity->kind == ENTITY_VARIABLE);
4052 initializer_t *initializer = entity->variable.initializer;
4053 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4054 ir_entity *irentity = entity->variable.v.entity;
4055 type_t *type = entity->declaration.type;
4057 create_local_initializer(initializer, dbgi, irentity, type);
4060 static void create_variable_initializer(entity_t *entity)
4062 assert(entity->kind == ENTITY_VARIABLE);
4063 initializer_t *initializer = entity->variable.initializer;
4064 if (initializer == NULL)
4067 declaration_kind_t declaration_kind
4068 = (declaration_kind_t) entity->declaration.kind;
4069 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4070 create_initializer_local_variable_entity(entity);
4074 type_t *type = entity->declaration.type;
4075 type_qualifiers_t tq = get_type_qualifier(type, true);
4077 if (initializer->kind == INITIALIZER_VALUE) {
4078 expression_t * value = initializer->value.value;
4079 type_t *const init_type = skip_typeref(value->base.type);
4081 if (!is_type_scalar(init_type)) {
4083 while (value->kind == EXPR_UNARY_CAST)
4084 value = value->unary.value;
4086 if (value->kind != EXPR_COMPOUND_LITERAL)
4087 panic("expected non-scalar initializer to be a compound literal");
4088 initializer = value->compound_literal.initializer;
4089 goto have_initializer;
4092 ir_node * node = expression_to_firm(value);
4093 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4094 node = conv_to_storage_type(dbgi, node, init_type);
4096 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4097 set_value(entity->variable.v.value_number, node);
4099 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4101 ir_entity *irentity = entity->variable.v.entity;
4103 if (tq & TYPE_QUALIFIER_CONST
4104 && get_entity_owner(irentity) != get_tls_type()) {
4105 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4107 set_atomic_ent_value(irentity, node);
4111 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4112 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4114 ir_entity *irentity = entity->variable.v.entity;
4115 ir_initializer_t *irinitializer
4116 = create_ir_initializer(initializer, type);
4118 if (tq & TYPE_QUALIFIER_CONST) {
4119 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4121 set_entity_initializer(irentity, irinitializer);
4125 static void create_variable_length_array(entity_t *entity)
4127 assert(entity->kind == ENTITY_VARIABLE);
4128 assert(entity->variable.initializer == NULL);
4130 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4131 entity->variable.v.vla_base = NULL;
4133 /* TODO: record VLA somewhere so we create the free node when we leave
4137 static void allocate_variable_length_array(entity_t *entity)
4139 assert(entity->kind == ENTITY_VARIABLE);
4140 assert(entity->variable.initializer == NULL);
4141 assert(currently_reachable());
4143 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4144 type_t *type = entity->declaration.type;
4145 ir_type *el_type = get_ir_type(type->array.element_type);
4147 /* make sure size_node is calculated */
4148 get_type_size_node(type);
4149 ir_node *elems = type->array.size_node;
4150 ir_node *mem = get_store();
4151 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4153 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4154 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4157 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4158 entity->variable.v.vla_base = addr;
4161 static bool var_needs_entity(variable_t const *const var)
4163 if (var->address_taken)
4165 type_t *const type = skip_typeref(var->base.type);
4166 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4170 * Creates a Firm local variable from a declaration.
4172 static void create_local_variable(entity_t *entity)
4174 assert(entity->kind == ENTITY_VARIABLE);
4175 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4177 if (!var_needs_entity(&entity->variable)) {
4178 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4179 entity->variable.v.value_number = next_value_number_function;
4180 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4181 ++next_value_number_function;
4185 /* is it a variable length array? */
4186 type_t *const type = skip_typeref(entity->declaration.type);
4187 if (is_type_array(type) && !type->array.size_constant) {
4188 create_variable_length_array(entity);
4192 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4193 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4196 static void create_local_static_variable(entity_t *entity)
4198 assert(entity->kind == ENTITY_VARIABLE);
4199 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4201 type_t *type = skip_typeref(entity->declaration.type);
4202 ir_type *const var_type = entity->variable.thread_local ?
4203 get_tls_type() : get_glob_type();
4204 ir_type *const irtype = get_ir_type(type);
4205 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4207 size_t l = strlen(entity->base.symbol->string);
4208 char buf[l + sizeof(".%u")];
4209 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4210 ident *const id = id_unique(buf);
4211 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4213 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4214 set_entity_volatility(irentity, volatility_is_volatile);
4217 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4218 entity->variable.v.entity = irentity;
4220 set_entity_ld_ident(irentity, id);
4221 set_entity_visibility(irentity, ir_visibility_local);
4223 if (entity->variable.initializer == NULL) {
4224 ir_initializer_t *null_init = get_initializer_null();
4225 set_entity_initializer(irentity, null_init);
4228 PUSH_IRG(get_const_code_irg());
4229 create_variable_initializer(entity);
4235 static ir_node *return_statement_to_firm(return_statement_t *statement)
4237 if (!currently_reachable())
4240 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4241 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4242 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4245 if (!is_type_void(type)) {
4247 res = conv_to_storage_type(dbgi, res, type);
4249 res = new_Unknown(get_ir_mode_storage(type));
4256 ir_node *const in[1] = { res };
4257 ir_node *const store = get_store();
4258 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4260 ir_node *end_block = get_irg_end_block(current_ir_graph);
4261 add_immBlock_pred(end_block, ret);
4263 set_unreachable_now();
4267 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4269 if (!currently_reachable())
4272 return expression_to_firm(statement->expression);
4275 static void create_local_declarations(entity_t*);
4277 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4279 create_local_declarations(compound->scope.entities);
4281 ir_node *result = NULL;
4282 statement_t *statement = compound->statements;
4283 for ( ; statement != NULL; statement = statement->base.next) {
4284 result = statement_to_firm(statement);
4290 static void create_global_variable(entity_t *entity)
4292 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4293 ir_visibility visibility = ir_visibility_external;
4294 storage_class_tag_t storage
4295 = (storage_class_tag_t)entity->declaration.storage_class;
4296 decl_modifiers_t modifiers = entity->declaration.modifiers;
4297 assert(entity->kind == ENTITY_VARIABLE);
4300 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4301 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4302 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4303 case STORAGE_CLASS_TYPEDEF:
4304 case STORAGE_CLASS_AUTO:
4305 case STORAGE_CLASS_REGISTER:
4306 panic("invalid storage class for global var");
4309 /* "common" symbols */
4310 if (storage == STORAGE_CLASS_NONE
4311 && entity->variable.initializer == NULL
4312 && !entity->variable.thread_local
4313 && (modifiers & DM_WEAK) == 0) {
4314 linkage |= IR_LINKAGE_MERGE;
4317 ir_type *var_type = get_glob_type();
4318 if (entity->variable.thread_local) {
4319 var_type = get_tls_type();
4321 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4322 ir_entity *irentity = entity->variable.v.entity;
4323 add_entity_linkage(irentity, linkage);
4324 set_entity_visibility(irentity, visibility);
4325 if (entity->variable.initializer == NULL
4326 && storage != STORAGE_CLASS_EXTERN) {
4327 ir_initializer_t *null_init = get_initializer_null();
4328 set_entity_initializer(irentity, null_init);
4332 static void create_local_declaration(entity_t *entity)
4334 assert(is_declaration(entity));
4336 /* construct type */
4337 (void) get_ir_type(entity->declaration.type);
4338 if (entity->base.symbol == NULL) {
4342 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4343 case STORAGE_CLASS_STATIC:
4344 if (entity->kind == ENTITY_FUNCTION) {
4345 (void)get_function_entity(entity, NULL);
4347 create_local_static_variable(entity);
4350 case STORAGE_CLASS_EXTERN:
4351 if (entity->kind == ENTITY_FUNCTION) {
4352 assert(entity->function.body == NULL);
4353 (void)get_function_entity(entity, NULL);
4355 create_global_variable(entity);
4356 create_variable_initializer(entity);
4359 case STORAGE_CLASS_NONE:
4360 case STORAGE_CLASS_AUTO:
4361 case STORAGE_CLASS_REGISTER:
4362 if (entity->kind == ENTITY_FUNCTION) {
4363 if (entity->function.body != NULL) {
4364 ir_type *owner = get_irg_frame_type(current_ir_graph);
4365 (void)get_function_entity(entity, owner);
4366 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4367 enqueue_inner_function(entity);
4369 (void)get_function_entity(entity, NULL);
4372 create_local_variable(entity);
4375 case STORAGE_CLASS_TYPEDEF:
4378 panic("invalid storage class");
4381 static void create_local_declarations(entity_t *e)
4383 for (; e; e = e->base.next) {
4384 if (is_declaration(e))
4385 create_local_declaration(e);
4389 static void initialize_local_declaration(entity_t *entity)
4391 if (entity->base.symbol == NULL)
4394 // no need to emit code in dead blocks
4395 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4396 && !currently_reachable())
4399 switch ((declaration_kind_t) entity->declaration.kind) {
4400 case DECLARATION_KIND_LOCAL_VARIABLE:
4401 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4402 create_variable_initializer(entity);
4405 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4406 allocate_variable_length_array(entity);
4409 case DECLARATION_KIND_COMPOUND_MEMBER:
4410 case DECLARATION_KIND_GLOBAL_VARIABLE:
4411 case DECLARATION_KIND_FUNCTION:
4412 case DECLARATION_KIND_INNER_FUNCTION:
4415 case DECLARATION_KIND_PARAMETER:
4416 case DECLARATION_KIND_PARAMETER_ENTITY:
4417 panic("can't initialize parameters");
4419 case DECLARATION_KIND_UNKNOWN:
4420 panic("can't initialize unknown declaration");
4422 panic("invalid declaration kind");
4425 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4427 entity_t *entity = statement->declarations_begin;
4431 entity_t *const last = statement->declarations_end;
4432 for ( ;; entity = entity->base.next) {
4433 if (is_declaration(entity)) {
4434 initialize_local_declaration(entity);
4435 } else if (entity->kind == ENTITY_TYPEDEF) {
4436 /* ยง6.7.7:3 Any array size expressions associated with variable length
4437 * array declarators are evaluated each time the declaration of the
4438 * typedef name is reached in the order of execution. */
4439 type_t *const type = skip_typeref(entity->typedefe.type);
4440 if (is_type_array(type) && type->array.is_vla)
4441 get_vla_size(&type->array);
4450 static ir_node *if_statement_to_firm(if_statement_t *statement)
4452 create_local_declarations(statement->scope.entities);
4454 /* Create the condition. */
4455 jump_target true_target;
4456 jump_target false_target;
4457 init_jump_target(&true_target, NULL);
4458 init_jump_target(&false_target, NULL);
4459 if (currently_reachable())
4460 create_condition_evaluation(statement->condition, &true_target, &false_target);
4462 jump_target exit_target;
4463 init_jump_target(&exit_target, NULL);
4465 /* Create the true statement. */
4466 enter_jump_target(&true_target);
4467 statement_to_firm(statement->true_statement);
4468 jump_to_target(&exit_target);
4470 /* Create the false statement. */
4471 enter_jump_target(&false_target);
4472 if (statement->false_statement)
4473 statement_to_firm(statement->false_statement);
4474 jump_to_target(&exit_target);
4476 enter_jump_target(&exit_target);
4480 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4482 create_local_declarations(statement->scope.entities);
4485 PUSH_CONTINUE(NULL);
4487 expression_t *const cond = statement->condition;
4488 /* Avoid an explicit body block in case of do ... while (0);. */
4489 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4490 /* do ... while (0);. */
4491 statement_to_firm(statement->body);
4492 jump_to_target(&continue_target);
4493 enter_jump_target(&continue_target);
4494 jump_to_target(&break_target);
4496 jump_target body_target;
4497 init_jump_target(&body_target, NULL);
4498 jump_to_target(&body_target);
4499 enter_immature_jump_target(&body_target);
4501 statement_to_firm(statement->body);
4502 jump_to_target(&continue_target);
4503 if (enter_jump_target(&continue_target))
4504 create_condition_evaluation(statement->condition, &body_target, &break_target);
4505 enter_jump_target(&body_target);
4507 enter_jump_target(&break_target);
4514 static ir_node *for_statement_to_firm(for_statement_t *statement)
4516 create_local_declarations(statement->scope.entities);
4518 if (currently_reachable()) {
4519 entity_t *entity = statement->scope.entities;
4520 for ( ; entity != NULL; entity = entity->base.next) {
4521 if (!is_declaration(entity))
4524 initialize_local_declaration(entity);
4527 if (statement->initialisation != NULL) {
4528 expression_to_firm(statement->initialisation);
4532 /* Create the header block */
4533 jump_target header_target;
4534 init_jump_target(&header_target, NULL);
4535 jump_to_target(&header_target);
4536 enter_immature_jump_target(&header_target);
4539 expression_t *const step = statement->step;
4541 PUSH_CONTINUE(step ? NULL : header_target.block);
4543 /* Create the condition. */
4544 expression_t *const cond = statement->condition;
4545 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4546 jump_target body_target;
4547 init_jump_target(&body_target, NULL);
4548 create_condition_evaluation(cond, &body_target, &break_target);
4549 enter_jump_target(&body_target);
4552 /* Create the loop body. */
4553 statement_to_firm(statement->body);
4554 jump_to_target(&continue_target);
4556 /* Create the step code. */
4557 if (step && enter_jump_target(&continue_target)) {
4558 expression_to_firm(step);
4559 jump_to_target(&header_target);
4562 enter_jump_target(&header_target);
4563 enter_jump_target(&break_target);
4570 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4572 /* determine number of cases */
4574 for (case_label_statement_t *l = statement->first_case; l != NULL;
4577 if (l->expression == NULL)
4579 if (l->is_empty_range)
4584 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4586 for (case_label_statement_t *l = statement->first_case; l != NULL;
4588 if (l->expression == NULL) {
4589 l->pn = pn_Switch_default;
4592 if (l->is_empty_range)
4594 ir_tarval *min = l->first_case;
4595 ir_tarval *max = l->last_case;
4596 long pn = (long) i+1;
4597 ir_switch_table_set(res, i++, min, max, pn);
4603 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4605 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4606 ir_node *switch_node = NULL;
4608 if (currently_reachable()) {
4609 ir_node *expression = expression_to_firm(statement->expression);
4610 ir_switch_table *table = create_switch_table(statement);
4611 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4613 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4616 set_unreachable_now();
4619 ir_node *const old_switch = current_switch;
4620 const bool old_saw_default_label = saw_default_label;
4621 saw_default_label = false;
4622 current_switch = switch_node;
4624 statement_to_firm(statement->body);
4625 jump_to_target(&break_target);
4627 if (!saw_default_label && switch_node) {
4628 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4629 add_pred_to_jump_target(&break_target, proj);
4632 enter_jump_target(&break_target);
4634 assert(current_switch == switch_node);
4635 current_switch = old_switch;
4636 saw_default_label = old_saw_default_label;
4641 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4643 if (current_switch != NULL && !statement->is_empty_range) {
4644 jump_target case_target;
4645 init_jump_target(&case_target, NULL);
4647 /* Fallthrough from previous case */
4648 jump_to_target(&case_target);
4650 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4651 add_pred_to_jump_target(&case_target, proj);
4652 if (statement->expression == NULL)
4653 saw_default_label = true;
4655 enter_jump_target(&case_target);
4658 return statement_to_firm(statement->statement);
4661 static ir_node *label_to_firm(const label_statement_t *statement)
4663 label_t *const label = statement->label;
4664 prepare_label_target(label);
4665 jump_to_target(&label->target);
4666 if (--label->n_users == 0) {
4667 enter_jump_target(&label->target);
4669 enter_immature_jump_target(&label->target);
4673 return statement_to_firm(statement->statement);
4676 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4678 label_t *const label = stmt->label;
4679 prepare_label_target(label);
4680 jump_to_target(&label->target);
4681 if (--label->n_users == 0)
4682 enter_jump_target(&label->target);
4683 set_unreachable_now();
4687 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4689 if (currently_reachable()) {
4690 ir_node *const op = expression_to_firm(statement->expression);
4691 ARR_APP1(ir_node*, ijmp_ops, op);
4692 jump_to_target(&ijmp_target);
4693 set_unreachable_now();
4698 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4700 bool needs_memory = statement->is_volatile;
4701 size_t n_clobbers = 0;
4702 asm_clobber_t *clobber = statement->clobbers;
4703 for ( ; clobber != NULL; clobber = clobber->next) {
4704 const char *clobber_str = clobber->clobber.begin;
4706 if (!be_is_valid_clobber(clobber_str)) {
4707 errorf(&statement->base.pos,
4708 "invalid clobber '%s' specified", clobber->clobber);
4712 if (streq(clobber_str, "memory")) {
4713 needs_memory = true;
4717 ident *id = new_id_from_str(clobber_str);
4718 obstack_ptr_grow(&asm_obst, id);
4721 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4722 ident **clobbers = NULL;
4723 if (n_clobbers > 0) {
4724 clobbers = obstack_finish(&asm_obst);
4727 size_t n_inputs = 0;
4728 asm_argument_t *argument = statement->inputs;
4729 for ( ; argument != NULL; argument = argument->next)
4731 size_t n_outputs = 0;
4732 argument = statement->outputs;
4733 for ( ; argument != NULL; argument = argument->next)
4736 unsigned next_pos = 0;
4738 ir_node *ins[n_inputs + n_outputs + 1];
4741 ir_asm_constraint tmp_in_constraints[n_outputs];
4743 const expression_t *out_exprs[n_outputs];
4744 ir_node *out_addrs[n_outputs];
4745 size_t out_size = 0;
4747 argument = statement->outputs;
4748 for ( ; argument != NULL; argument = argument->next) {
4749 const char *constraints = argument->constraints.begin;
4750 asm_constraint_flags_t asm_flags
4751 = be_parse_asm_constraints(constraints);
4754 position_t const *const pos = &statement->base.pos;
4755 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4756 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4758 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4759 errorf(pos, "some constraints in '%s' are invalid", constraints);
4762 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4763 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4768 unsigned pos = next_pos++;
4769 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4770 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4771 expression_t *expr = argument->expression;
4772 ir_node *addr = expression_to_addr(expr);
4773 /* in+output, construct an artifical same_as constraint on the
4775 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4777 ir_node *value = get_value_from_lvalue(expr, addr);
4779 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4781 ir_asm_constraint constraint;
4782 constraint.pos = pos;
4783 constraint.constraint = new_id_from_str(buf);
4784 constraint.mode = get_ir_mode_storage(expr->base.type);
4785 tmp_in_constraints[in_size] = constraint;
4786 ins[in_size] = value;
4791 out_exprs[out_size] = expr;
4792 out_addrs[out_size] = addr;
4794 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4795 /* pure memory ops need no input (but we have to make sure we
4796 * attach to the memory) */
4797 assert(! (asm_flags &
4798 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4799 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4800 needs_memory = true;
4802 /* we need to attach the address to the inputs */
4803 expression_t *expr = argument->expression;
4805 ir_asm_constraint constraint;
4806 constraint.pos = pos;
4807 constraint.constraint = new_id_from_str(constraints);
4808 constraint.mode = mode_M;
4809 tmp_in_constraints[in_size] = constraint;
4811 ins[in_size] = expression_to_addr(expr);
4815 errorf(&statement->base.pos,
4816 "only modifiers but no place set in constraints '%s'",
4821 ir_asm_constraint constraint;
4822 constraint.pos = pos;
4823 constraint.constraint = new_id_from_str(constraints);
4824 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4826 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4828 assert(obstack_object_size(&asm_obst)
4829 == out_size * sizeof(ir_asm_constraint));
4830 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4833 obstack_grow(&asm_obst, tmp_in_constraints,
4834 in_size * sizeof(tmp_in_constraints[0]));
4835 /* find and count input and output arguments */
4836 argument = statement->inputs;
4837 for ( ; argument != NULL; argument = argument->next) {
4838 const char *constraints = argument->constraints.begin;
4839 asm_constraint_flags_t asm_flags
4840 = be_parse_asm_constraints(constraints);
4842 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4843 errorf(&statement->base.pos,
4844 "some constraints in '%s' are not supported", constraints);
4847 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4848 errorf(&statement->base.pos,
4849 "some constraints in '%s' are invalid", constraints);
4852 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4853 errorf(&statement->base.pos,
4854 "write flag specified for input constraints '%s'",
4860 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4861 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4862 /* we can treat this as "normal" input */
4863 input = expression_to_firm(argument->expression);
4864 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4865 /* pure memory ops need no input (but we have to make sure we
4866 * attach to the memory) */
4867 assert(! (asm_flags &
4868 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4869 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4870 needs_memory = true;
4871 input = expression_to_addr(argument->expression);
4873 errorf(&statement->base.pos,
4874 "only modifiers but no place set in constraints '%s'",
4879 ir_asm_constraint constraint;
4880 constraint.pos = next_pos++;
4881 constraint.constraint = new_id_from_str(constraints);
4882 constraint.mode = get_irn_mode(input);
4884 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4885 ins[in_size++] = input;
4888 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4889 assert(obstack_object_size(&asm_obst)
4890 == in_size * sizeof(ir_asm_constraint));
4891 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4893 /* create asm node */
4894 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4896 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4898 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4899 out_size, output_constraints,
4900 n_clobbers, clobbers, asm_text);
4902 if (statement->is_volatile) {
4903 set_irn_pinned(node, op_pin_state_pinned);
4905 set_irn_pinned(node, op_pin_state_floats);
4908 /* create output projs & connect them */
4910 ir_node *projm = new_Proj(node, mode_M, out_size);
4915 for (i = 0; i < out_size; ++i) {
4916 const expression_t *out_expr = out_exprs[i];
4918 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
4919 ir_node *proj = new_Proj(node, mode, pn);
4920 ir_node *addr = out_addrs[i];
4922 set_value_for_expression_addr(out_expr, proj, addr);
4928 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4930 statement_to_firm(statement->try_statement);
4931 position_t const *const pos = &statement->base.pos;
4932 warningf(WARN_OTHER, pos, "structured exception handling ignored");
4936 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4938 errorf(&statement->base.pos, "__leave not supported yet");
4943 * Transform a statement.
4945 static ir_node *statement_to_firm(statement_t *const stmt)
4948 assert(!stmt->base.transformed);
4949 stmt->base.transformed = true;
4952 switch (stmt->kind) {
4953 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
4954 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
4955 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
4956 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
4957 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
4958 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
4959 case STATEMENT_EMPTY: return NULL; /* nothing */
4960 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
4961 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
4962 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
4963 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
4964 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
4965 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
4966 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
4967 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
4968 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
4972 case STATEMENT_BREAK: tgt = &break_target; goto jump;
4973 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
4975 jump_to_target(tgt);
4976 set_unreachable_now();
4980 case STATEMENT_ERROR: panic("error statement");
4982 panic("statement not implemented");
4985 static int count_local_variables(const entity_t *entity,
4986 const entity_t *const last)
4989 entity_t const *const end = last != NULL ? last->base.next : NULL;
4990 for (; entity != end; entity = entity->base.next) {
4991 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
4992 !var_needs_entity(&entity->variable))
4998 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5000 int *const count = env;
5002 switch (stmt->kind) {
5003 case STATEMENT_DECLARATION: {
5004 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5005 *count += count_local_variables(decl_stmt->declarations_begin,
5006 decl_stmt->declarations_end);
5011 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5020 * Return the number of local (alias free) variables used by a function.
5022 static int get_function_n_local_vars(entity_t *entity)
5024 const function_t *function = &entity->function;
5027 /* count parameters */
5028 count += count_local_variables(function->parameters.entities, NULL);
5030 /* count local variables declared in body */
5031 walk_statements(function->body, count_local_variables_in_stmt, &count);
5036 * Build Firm code for the parameters of a function.
5038 static void initialize_function_parameters(entity_t *entity)
5040 assert(entity->kind == ENTITY_FUNCTION);
5041 ir_graph *irg = current_ir_graph;
5042 ir_node *args = get_irg_args(irg);
5044 ir_type *function_irtype;
5046 if (entity->function.need_closure) {
5047 /* add an extra parameter for the static link */
5048 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5051 /* Matze: IMO this is wrong, nested functions should have an own
5052 * type and not rely on strange parameters... */
5053 function_irtype = create_method_type(&entity->declaration.type->function, true);
5055 function_irtype = get_ir_type(entity->declaration.type);
5060 entity_t *parameter = entity->function.parameters.entities;
5061 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5062 if (parameter->kind != ENTITY_PARAMETER)
5065 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5066 type_t *type = skip_typeref(parameter->declaration.type);
5068 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5069 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5070 if (var_needs_entity(¶meter->variable)) {
5071 ir_type *frame_type = get_irg_frame_type(irg);
5073 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5074 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5075 parameter->variable.v.entity = param;
5079 ir_mode *param_mode = get_type_mode(param_irtype);
5081 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5082 value = conv_to_storage_type(dbgi, value, type);
5084 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5085 parameter->variable.v.value_number = next_value_number_function;
5086 set_irg_loc_description(current_ir_graph, next_value_number_function,
5088 ++next_value_number_function;
5090 set_value(parameter->variable.v.value_number, value);
5094 static void add_function_pointer(ir_type *segment, ir_entity *method,
5095 const char *unique_template)
5097 ir_type *method_type = get_entity_type(method);
5098 ir_type *ptr_type = new_type_pointer(method_type);
5100 /* these entities don't really have a name but firm only allows
5102 * Note that we mustn't give these entities a name since for example
5103 * Mach-O doesn't allow them. */
5104 ident *ide = id_unique(unique_template);
5105 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5106 ir_graph *irg = get_const_code_irg();
5107 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5110 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5111 set_entity_compiler_generated(ptr, 1);
5112 set_entity_visibility(ptr, ir_visibility_private);
5113 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5114 set_atomic_ent_value(ptr, val);
5118 * Create code for a function and all inner functions.
5120 * @param entity the function entity
5122 static void create_function(entity_t *entity)
5124 assert(entity->kind == ENTITY_FUNCTION);
5125 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5127 if (entity->function.body == NULL)
5130 inner_functions = NULL;
5131 current_trampolines = NULL;
5133 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5134 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5135 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5137 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5138 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5139 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5142 current_function_entity = entity;
5143 current_function_name = NULL;
5144 current_funcsig = NULL;
5147 assert(!ijmp_blocks);
5148 init_jump_target(&ijmp_target, NULL);
5149 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5150 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5152 int n_local_vars = get_function_n_local_vars(entity);
5153 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5154 current_ir_graph = irg;
5156 ir_graph *old_current_function = current_function;
5157 current_function = irg;
5159 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5160 current_vararg_entity = NULL;
5162 set_irg_fp_model(irg, firm_fp_model);
5163 set_irn_dbg_info(get_irg_start_block(irg),
5164 get_entity_dbg_info(function_entity));
5166 next_value_number_function = 0;
5167 initialize_function_parameters(entity);
5168 current_static_link = entity->function.static_link;
5170 statement_to_firm(entity->function.body);
5172 ir_node *end_block = get_irg_end_block(irg);
5174 /* do we have a return statement yet? */
5175 if (currently_reachable()) {
5176 type_t *type = skip_typeref(entity->declaration.type);
5177 assert(is_type_function(type));
5178 type_t *const return_type = skip_typeref(type->function.return_type);
5181 if (is_type_void(return_type)) {
5182 ret = new_Return(get_store(), 0, NULL);
5184 ir_mode *const mode = get_ir_mode_storage(return_type);
5187 /* ยง5.1.2.2.3 main implicitly returns 0 */
5188 if (is_main(entity)) {
5189 in[0] = new_Const(get_mode_null(mode));
5191 in[0] = new_Unknown(mode);
5193 ret = new_Return(get_store(), 1, in);
5195 add_immBlock_pred(end_block, ret);
5198 if (enter_jump_target(&ijmp_target)) {
5200 size_t const n = ARR_LEN(ijmp_ops);
5201 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5202 ir_node *const ijmp = new_IJmp(op);
5203 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5204 ir_node *const block = ijmp_blocks[i];
5205 add_immBlock_pred(block, ijmp);
5206 mature_immBlock(block);
5210 DEL_ARR_F(ijmp_ops);
5211 DEL_ARR_F(ijmp_blocks);
5215 irg_finalize_cons(irg);
5217 /* finalize the frame type */
5218 ir_type *frame_type = get_irg_frame_type(irg);
5219 int n = get_compound_n_members(frame_type);
5222 for (int i = 0; i < n; ++i) {
5223 ir_entity *member = get_compound_member(frame_type, i);
5224 ir_type *entity_type = get_entity_type(member);
5226 int align = get_type_alignment_bytes(entity_type);
5227 if (align > align_all)
5231 misalign = offset % align;
5233 offset += align - misalign;
5237 set_entity_offset(member, offset);
5238 offset += get_type_size_bytes(entity_type);
5240 set_type_size_bytes(frame_type, offset);
5241 set_type_alignment_bytes(frame_type, align_all);
5243 irg_verify(irg, VERIFY_ENFORCE_SSA);
5244 current_vararg_entity = old_current_vararg_entity;
5245 current_function = old_current_function;
5247 if (current_trampolines != NULL) {
5248 DEL_ARR_F(current_trampolines);
5249 current_trampolines = NULL;
5252 /* create inner functions if any */
5253 entity_t **inner = inner_functions;
5254 if (inner != NULL) {
5255 ir_type *rem_outer_frame = current_outer_frame;
5256 current_outer_frame = get_irg_frame_type(current_ir_graph);
5257 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5258 create_function(inner[i]);
5262 current_outer_frame = rem_outer_frame;
5266 static void scope_to_firm(scope_t *scope)
5268 /* first pass: create declarations */
5269 entity_t *entity = scope->entities;
5270 for ( ; entity != NULL; entity = entity->base.next) {
5271 if (entity->base.symbol == NULL)
5274 if (entity->kind == ENTITY_FUNCTION) {
5275 if (entity->function.btk != BUILTIN_NONE) {
5276 /* builtins have no representation */
5279 (void)get_function_entity(entity, NULL);
5280 } else if (entity->kind == ENTITY_VARIABLE) {
5281 create_global_variable(entity);
5282 } else if (entity->kind == ENTITY_NAMESPACE) {
5283 scope_to_firm(&entity->namespacee.members);
5287 /* second pass: create code/initializers */
5288 entity = scope->entities;
5289 for ( ; entity != NULL; entity = entity->base.next) {
5290 if (entity->base.symbol == NULL)
5293 if (entity->kind == ENTITY_FUNCTION) {
5294 if (entity->function.btk != BUILTIN_NONE) {
5295 /* builtins have no representation */
5298 create_function(entity);
5299 } else if (entity->kind == ENTITY_VARIABLE) {
5300 assert(entity->declaration.kind
5301 == DECLARATION_KIND_GLOBAL_VARIABLE);
5302 current_ir_graph = get_const_code_irg();
5303 create_variable_initializer(entity);
5308 void init_ast2firm(void)
5310 obstack_init(&asm_obst);
5311 init_atomic_modes();
5313 ir_set_debug_retrieve(dbg_retrieve);
5314 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5316 /* create idents for all known runtime functions */
5317 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5318 rts_idents[i] = new_id_from_str(rts_data[i].name);
5321 entitymap_init(&entitymap);
5324 static void init_ir_types(void)
5326 static int ir_types_initialized = 0;
5327 if (ir_types_initialized)
5329 ir_types_initialized = 1;
5331 ir_type_char = get_ir_type(type_char);
5333 be_params = be_get_backend_param();
5334 mode_float_arithmetic = be_params->mode_float_arithmetic;
5336 stack_param_align = be_params->stack_param_align;
5339 void exit_ast2firm(void)
5341 entitymap_destroy(&entitymap);
5342 obstack_free(&asm_obst, NULL);
5345 static void global_asm_to_firm(statement_t *s)
5347 for (; s != NULL; s = s->base.next) {
5348 assert(s->kind == STATEMENT_ASM);
5350 char const *const text = s->asms.asm_text.begin;
5351 size_t const size = s->asms.asm_text.size;
5352 ident *const id = new_id_from_chars(text, size);
5357 static const char *get_cwd(void)
5359 static char buf[1024];
5360 if (buf[0] == '\0') {
5361 return getcwd(buf, sizeof(buf));
5366 void translation_unit_to_firm(translation_unit_t *unit)
5368 if (c_mode & _CXX) {
5369 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5370 } else if (c_mode & _C99) {
5371 be_dwarf_set_source_language(DW_LANG_C99);
5372 } else if (c_mode & _C89) {
5373 be_dwarf_set_source_language(DW_LANG_C89);
5375 be_dwarf_set_source_language(DW_LANG_C);
5377 const char *cwd = get_cwd();
5379 be_dwarf_set_compilation_directory(cwd);
5382 /* initialize firm arithmetic */
5383 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5384 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5386 /* just to be sure */
5387 init_jump_target(&break_target, NULL);
5388 init_jump_target(&continue_target, NULL);
5389 current_switch = NULL;
5390 current_translation_unit = unit;
5394 scope_to_firm(&unit->scope);
5395 global_asm_to_firm(unit->global_asm);
5397 current_ir_graph = NULL;
5398 current_translation_unit = NULL;