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))
2232 from_type = skip_typeref(from_type);
2233 ir_mode *mode = get_ir_mode_storage(type);
2234 /* check for conversion from / to __based types */
2235 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2236 const variable_t *from_var = from_type->pointer.base_variable;
2237 const variable_t *to_var = type->pointer.base_variable;
2238 if (from_var != to_var) {
2239 if (from_var != NULL) {
2240 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2241 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2242 value_node = new_d_Add(dbgi, value_node, base, mode);
2244 if (to_var != NULL) {
2245 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2246 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2247 value_node = new_d_Sub(dbgi, value_node, base, mode);
2252 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2253 /* bool adjustments (we save a mode_Bu, but have to temporarily
2254 * convert to mode_b so we only get a 0/1 value */
2255 value_node = create_conv(dbgi, value_node, mode_b);
2258 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2259 ir_node *node = create_conv(dbgi, value_node, mode);
2260 node = create_conv(dbgi, node, mode_arith);
2265 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2267 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2268 type_t *type = skip_typeref(expression->base.type);
2270 const expression_t *value = expression->value;
2272 switch(expression->base.kind) {
2273 case EXPR_UNARY_TAKE_ADDRESS:
2274 return expression_to_addr(value);
2276 case EXPR_UNARY_NEGATE: {
2277 ir_node *value_node = expression_to_firm(value);
2278 ir_mode *mode = get_ir_mode_arithmetic(type);
2279 return new_d_Minus(dbgi, value_node, mode);
2281 case EXPR_UNARY_PLUS:
2282 return expression_to_firm(value);
2283 case EXPR_UNARY_BITWISE_NEGATE: {
2284 ir_node *value_node = expression_to_firm(value);
2285 ir_mode *mode = get_ir_mode_arithmetic(type);
2286 return new_d_Not(dbgi, value_node, mode);
2288 case EXPR_UNARY_NOT: {
2289 ir_node *value_node = _expression_to_firm(value);
2290 value_node = create_conv(dbgi, value_node, mode_b);
2291 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2294 case EXPR_UNARY_DEREFERENCE: {
2295 ir_node *value_node = expression_to_firm(value);
2296 type_t *value_type = skip_typeref(value->base.type);
2297 assert(is_type_pointer(value_type));
2299 /* check for __based */
2300 const variable_t *const base_var = value_type->pointer.base_variable;
2301 if (base_var != NULL) {
2302 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2303 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2304 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2306 type_t *points_to = value_type->pointer.points_to;
2307 return deref_address(dbgi, points_to, value_node);
2313 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
2314 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
2315 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
2316 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
2318 return create_incdec(expression, inc, pre);
2321 case EXPR_UNARY_CAST: {
2322 ir_node *value_node = expression_to_firm(value);
2323 type_t *from_type = value->base.type;
2324 return create_cast(dbgi, value_node, from_type, type);
2326 case EXPR_UNARY_ASSUME:
2327 return handle_assume(dbgi, value);
2332 panic("invalid unary expression type");
2336 * produces a 0/1 depending of the value of a mode_b node
2338 static ir_node *produce_condition_result(const expression_t *expression,
2339 ir_mode *mode, dbg_info *dbgi)
2341 jump_target true_target;
2342 jump_target false_target;
2343 init_jump_target(&true_target, NULL);
2344 init_jump_target(&false_target, NULL);
2345 create_condition_evaluation(expression, &true_target, &false_target);
2347 ir_node *val = NULL;
2348 jump_target exit_target;
2349 init_jump_target(&exit_target, NULL);
2351 if (enter_jump_target(&true_target)) {
2352 val = new_Const(get_mode_one(mode));
2353 jump_to_target(&exit_target);
2356 if (enter_jump_target(&false_target)) {
2357 ir_node *const zero = new_Const(get_mode_null(mode));
2358 jump_to_target(&exit_target);
2360 ir_node *const in[] = { val, zero };
2361 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2367 if (!enter_jump_target(&exit_target)) {
2368 set_cur_block(new_Block(0, NULL));
2369 val = new_Unknown(mode);
2374 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2375 ir_node *value, type_t *type)
2377 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2378 assert(is_type_pointer(type));
2379 pointer_type_t *const pointer_type = &type->pointer;
2380 type_t *const points_to = skip_typeref(pointer_type->points_to);
2381 ir_node * elem_size = get_type_size_node(points_to);
2382 elem_size = create_conv(dbgi, elem_size, mode);
2383 value = create_conv(dbgi, value, mode);
2384 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2388 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2389 ir_node *left, ir_node *right)
2392 type_t *type_left = skip_typeref(expression->left->base.type);
2393 type_t *type_right = skip_typeref(expression->right->base.type);
2395 expression_kind_t kind = expression->base.kind;
2398 case EXPR_BINARY_SHIFTLEFT:
2399 case EXPR_BINARY_SHIFTRIGHT:
2400 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2401 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2402 mode = get_ir_mode_arithmetic(expression->base.type);
2403 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2406 case EXPR_BINARY_SUB:
2407 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2408 const pointer_type_t *const ptr_type = &type_left->pointer;
2410 mode = get_ir_mode_arithmetic(expression->base.type);
2411 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2412 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2413 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2414 ir_node *const no_mem = new_NoMem();
2415 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2416 mode, op_pin_state_floats);
2417 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2420 case EXPR_BINARY_SUB_ASSIGN:
2421 if (is_type_pointer(type_left)) {
2422 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2423 mode = get_ir_mode_arithmetic(type_left);
2428 case EXPR_BINARY_ADD:
2429 case EXPR_BINARY_ADD_ASSIGN:
2430 if (is_type_pointer(type_left)) {
2431 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2432 mode = get_ir_mode_arithmetic(type_left);
2434 } else if (is_type_pointer(type_right)) {
2435 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2436 mode = get_ir_mode_arithmetic(type_right);
2443 mode = get_ir_mode_arithmetic(type_right);
2444 left = create_conv(dbgi, left, mode);
2449 case EXPR_BINARY_ADD_ASSIGN:
2450 case EXPR_BINARY_ADD:
2451 return new_d_Add(dbgi, left, right, mode);
2452 case EXPR_BINARY_SUB_ASSIGN:
2453 case EXPR_BINARY_SUB:
2454 return new_d_Sub(dbgi, left, right, mode);
2455 case EXPR_BINARY_MUL_ASSIGN:
2456 case EXPR_BINARY_MUL:
2457 return new_d_Mul(dbgi, left, right, mode);
2458 case EXPR_BINARY_BITWISE_AND:
2459 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2460 return new_d_And(dbgi, left, right, mode);
2461 case EXPR_BINARY_BITWISE_OR:
2462 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2463 return new_d_Or(dbgi, left, right, mode);
2464 case EXPR_BINARY_BITWISE_XOR:
2465 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2466 return new_d_Eor(dbgi, left, right, mode);
2467 case EXPR_BINARY_SHIFTLEFT:
2468 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2469 return new_d_Shl(dbgi, left, right, mode);
2470 case EXPR_BINARY_SHIFTRIGHT:
2471 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2472 if (mode_is_signed(mode)) {
2473 return new_d_Shrs(dbgi, left, right, mode);
2475 return new_d_Shr(dbgi, left, right, mode);
2477 case EXPR_BINARY_DIV:
2478 case EXPR_BINARY_DIV_ASSIGN: {
2479 ir_node *pin = new_Pin(new_NoMem());
2480 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2481 op_pin_state_floats);
2482 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2485 case EXPR_BINARY_MOD:
2486 case EXPR_BINARY_MOD_ASSIGN: {
2487 ir_node *pin = new_Pin(new_NoMem());
2488 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2489 op_pin_state_floats);
2490 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2494 panic("unexpected expression kind");
2498 static ir_node *create_lazy_op(const binary_expression_t *expression)
2500 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2501 type_t *type = skip_typeref(expression->base.type);
2502 ir_mode *mode = get_ir_mode_arithmetic(type);
2504 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2505 bool val = fold_constant_to_bool(expression->left);
2506 expression_kind_t ekind = expression->base.kind;
2507 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2508 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2510 return new_Const(get_mode_null(mode));
2514 return new_Const(get_mode_one(mode));
2518 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2519 bool valr = fold_constant_to_bool(expression->right);
2520 return create_Const_from_bool(mode, valr);
2523 return produce_condition_result(expression->right, mode, dbgi);
2526 return produce_condition_result((const expression_t*) expression, mode,
2530 static ir_node *create_assign_binop(const binary_expression_t *expression)
2532 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2533 const expression_t *left_expr = expression->left;
2534 type_t *type = skip_typeref(left_expr->base.type);
2535 ir_node *right = expression_to_firm(expression->right);
2536 ir_node *left_addr = expression_to_addr(left_expr);
2537 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2538 ir_node *result = create_op(dbgi, expression, left, right);
2540 result = create_cast(dbgi, result, expression->right->base.type, type);
2542 result = set_value_for_expression_addr(left_expr, result, left_addr);
2544 if (!is_type_compound(type)) {
2545 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2546 result = create_conv(dbgi, result, mode_arithmetic);
2551 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2553 expression_kind_t kind = expression->base.kind;
2556 case EXPR_BINARY_EQUAL:
2557 case EXPR_BINARY_NOTEQUAL:
2558 case EXPR_BINARY_LESS:
2559 case EXPR_BINARY_LESSEQUAL:
2560 case EXPR_BINARY_GREATER:
2561 case EXPR_BINARY_GREATEREQUAL:
2562 case EXPR_BINARY_ISGREATER:
2563 case EXPR_BINARY_ISGREATEREQUAL:
2564 case EXPR_BINARY_ISLESS:
2565 case EXPR_BINARY_ISLESSEQUAL:
2566 case EXPR_BINARY_ISLESSGREATER:
2567 case EXPR_BINARY_ISUNORDERED: {
2568 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2569 ir_node *left = expression_to_firm(expression->left);
2570 ir_node *right = expression_to_firm(expression->right);
2571 ir_relation relation = get_relation(kind);
2572 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2575 case EXPR_BINARY_ASSIGN: {
2576 ir_node *addr = expression_to_addr(expression->left);
2577 ir_node *right = expression_to_firm(expression->right);
2579 = set_value_for_expression_addr(expression->left, right, addr);
2581 type_t *type = skip_typeref(expression->base.type);
2582 if (!is_type_compound(type)) {
2583 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2584 res = create_conv(NULL, res, mode_arithmetic);
2588 case EXPR_BINARY_ADD:
2589 case EXPR_BINARY_SUB:
2590 case EXPR_BINARY_MUL:
2591 case EXPR_BINARY_DIV:
2592 case EXPR_BINARY_MOD:
2593 case EXPR_BINARY_BITWISE_AND:
2594 case EXPR_BINARY_BITWISE_OR:
2595 case EXPR_BINARY_BITWISE_XOR:
2596 case EXPR_BINARY_SHIFTLEFT:
2597 case EXPR_BINARY_SHIFTRIGHT:
2599 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2600 ir_node *left = expression_to_firm(expression->left);
2601 ir_node *right = expression_to_firm(expression->right);
2602 return create_op(dbgi, expression, left, right);
2604 case EXPR_BINARY_LOGICAL_AND:
2605 case EXPR_BINARY_LOGICAL_OR:
2606 return create_lazy_op(expression);
2607 case EXPR_BINARY_COMMA:
2608 /* create side effects of left side */
2609 (void) expression_to_firm(expression->left);
2610 return _expression_to_firm(expression->right);
2612 case EXPR_BINARY_ADD_ASSIGN:
2613 case EXPR_BINARY_SUB_ASSIGN:
2614 case EXPR_BINARY_MUL_ASSIGN:
2615 case EXPR_BINARY_MOD_ASSIGN:
2616 case EXPR_BINARY_DIV_ASSIGN:
2617 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2618 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2619 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2620 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2621 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2622 return create_assign_binop(expression);
2624 panic("invalid binexpr type");
2628 static ir_node *array_access_addr(const array_access_expression_t *expression)
2630 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2631 ir_node *base_addr = expression_to_firm(expression->array_ref);
2632 ir_node *offset = expression_to_firm(expression->index);
2633 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2634 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2635 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2640 static ir_node *array_access_to_firm(
2641 const array_access_expression_t *expression)
2643 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2644 ir_node *addr = array_access_addr(expression);
2645 type_t *type = revert_automatic_type_conversion(
2646 (const expression_t*) expression);
2647 type = skip_typeref(type);
2649 return deref_address(dbgi, type, addr);
2652 static long get_offsetof_offset(const offsetof_expression_t *expression)
2654 type_t *orig_type = expression->type;
2657 designator_t *designator = expression->designator;
2658 for ( ; designator != NULL; designator = designator->next) {
2659 type_t *type = skip_typeref(orig_type);
2660 /* be sure the type is constructed */
2661 (void) get_ir_type(type);
2663 if (designator->symbol != NULL) {
2664 assert(is_type_compound(type));
2665 symbol_t *symbol = designator->symbol;
2667 compound_t *compound = type->compound.compound;
2668 entity_t *iter = compound->members.entities;
2669 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2671 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2672 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2673 offset += get_entity_offset(iter->compound_member.entity);
2675 orig_type = iter->declaration.type;
2677 expression_t *array_index = designator->array_index;
2678 assert(designator->array_index != NULL);
2679 assert(is_type_array(type));
2681 long index = fold_constant_to_int(array_index);
2682 ir_type *arr_type = get_ir_type(type);
2683 ir_type *elem_type = get_array_element_type(arr_type);
2684 long elem_size = get_type_size_bytes(elem_type);
2686 offset += index * elem_size;
2688 orig_type = type->array.element_type;
2695 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2697 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2698 long offset = get_offsetof_offset(expression);
2699 ir_tarval *tv = new_tarval_from_long(offset, mode);
2700 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2702 return new_d_Const(dbgi, tv);
2705 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2706 ir_entity *entity, type_t *type);
2707 static ir_initializer_t *create_ir_initializer(
2708 const initializer_t *initializer, type_t *type);
2710 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2711 initializer_t *initializer,
2714 /* create the ir_initializer */
2715 PUSH_IRG(get_const_code_irg());
2716 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2719 ident *const id = id_unique("initializer.%u");
2720 ir_type *const irtype = get_ir_type(type);
2721 ir_type *const global_type = get_glob_type();
2722 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2723 set_entity_ld_ident(entity, id);
2724 set_entity_visibility(entity, ir_visibility_private);
2725 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2726 set_entity_initializer(entity, irinitializer);
2730 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2732 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2733 type_t *type = expression->type;
2734 initializer_t *initializer = expression->initializer;
2736 if (expression->global_scope ||
2737 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2738 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2739 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2740 return create_symconst(dbgi, entity);
2742 /* create an entity on the stack */
2743 ident *const id = id_unique("CompLit.%u");
2744 ir_type *const irtype = get_ir_type(type);
2745 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2747 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2748 set_entity_ld_ident(entity, id);
2750 /* create initialisation code */
2751 create_local_initializer(initializer, dbgi, entity, type);
2753 /* create a sel for the compound literal address */
2754 ir_node *frame = get_irg_frame(current_ir_graph);
2755 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2760 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2762 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2763 type_t *const type = expr->type;
2764 ir_node *const addr = compound_literal_addr(expr);
2765 return deref_address(dbgi, type, addr);
2769 * Transform a sizeof expression into Firm code.
2771 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2773 type_t *const type = skip_typeref(expression->type);
2774 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2775 if (is_type_array(type) && type->array.is_vla
2776 && expression->tp_expression != NULL) {
2777 expression_to_firm(expression->tp_expression);
2780 return get_type_size_node(type);
2783 static entity_t *get_expression_entity(const expression_t *expression)
2785 if (expression->kind != EXPR_REFERENCE)
2788 return expression->reference.entity;
2791 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2793 switch(entity->kind) {
2794 case DECLARATION_KIND_CASES:
2795 return entity->declaration.alignment;
2798 return entity->compound.alignment;
2799 case ENTITY_TYPEDEF:
2800 return entity->typedefe.alignment;
2808 * Transform an alignof expression into Firm code.
2810 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2812 unsigned alignment = 0;
2814 const expression_t *tp_expression = expression->tp_expression;
2815 if (tp_expression != NULL) {
2816 entity_t *entity = get_expression_entity(tp_expression);
2817 if (entity != NULL) {
2818 alignment = get_cparser_entity_alignment(entity);
2822 if (alignment == 0) {
2823 type_t *type = expression->type;
2824 alignment = get_type_alignment(type);
2827 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2828 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2829 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2830 return new_d_Const(dbgi, tv);
2833 static void init_ir_types(void);
2835 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2837 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2839 bool constant_folding_old = constant_folding;
2840 constant_folding = true;
2841 int old_optimize = get_optimize();
2842 int old_constant_folding = get_opt_constant_folding();
2844 set_opt_constant_folding(1);
2848 PUSH_IRG(get_const_code_irg());
2849 ir_node *const cnst = expression_to_firm(expression);
2852 set_optimize(old_optimize);
2853 set_opt_constant_folding(old_constant_folding);
2854 constant_folding = constant_folding_old;
2856 if (!is_Const(cnst))
2857 panic("couldn't fold constant");
2858 return get_Const_tarval(cnst);
2861 /* this function is only used in parser.c, but it relies on libfirm functionality */
2862 bool constant_is_negative(const expression_t *expression)
2864 ir_tarval *tv = fold_constant_to_tarval(expression);
2865 return tarval_is_negative(tv);
2868 long fold_constant_to_int(const expression_t *expression)
2870 ir_tarval *tv = fold_constant_to_tarval(expression);
2871 if (!tarval_is_long(tv)) {
2872 panic("result of constant folding is not integer");
2875 return get_tarval_long(tv);
2878 bool fold_constant_to_bool(const expression_t *expression)
2880 ir_tarval *tv = fold_constant_to_tarval(expression);
2881 return !tarval_is_null(tv);
2884 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2886 jump_target true_target;
2887 jump_target false_target;
2888 init_jump_target(&true_target, NULL);
2889 init_jump_target(&false_target, NULL);
2890 ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2892 ir_node *val = NULL;
2893 jump_target exit_target;
2894 init_jump_target(&exit_target, NULL);
2896 if (enter_jump_target(&true_target)) {
2897 if (expression->true_expression) {
2898 val = expression_to_firm(expression->true_expression);
2899 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2902 /* Condition ended with a short circuit (&&, ||, !) operation or a
2903 * comparison. Generate a "1" as value for the true branch. */
2904 val = new_Const(get_mode_one(mode_Is));
2906 jump_to_target(&exit_target);
2909 if (enter_jump_target(&false_target)) {
2910 ir_node *const false_val = expression_to_firm(expression->false_expression);
2911 jump_to_target(&exit_target);
2913 ir_node *const in[] = { val, false_val };
2914 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2915 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2921 if (!enter_jump_target(&exit_target)) {
2922 set_cur_block(new_Block(0, NULL));
2923 type_t *const type = skip_typeref(expression->base.type);
2924 if (!is_type_void(type))
2925 val = new_Unknown(get_ir_mode_arithmetic(type));
2931 * Returns an IR-node representing the address of a field.
2933 static ir_node *select_addr(const select_expression_t *expression)
2935 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2937 construct_select_compound(expression);
2939 ir_node *compound_addr = expression_to_firm(expression->compound);
2941 entity_t *entry = expression->compound_entry;
2942 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2943 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2945 if (constant_folding) {
2946 ir_mode *mode = get_irn_mode(compound_addr);
2947 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2948 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2949 return new_d_Add(dbgi, compound_addr, ofs, mode);
2951 ir_entity *irentity = entry->compound_member.entity;
2952 assert(irentity != NULL);
2953 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2957 static ir_node *select_to_firm(const select_expression_t *expression)
2959 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2960 ir_node *addr = select_addr(expression);
2961 type_t *type = revert_automatic_type_conversion(
2962 (const expression_t*) expression);
2963 type = skip_typeref(type);
2965 entity_t *entry = expression->compound_entry;
2966 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2968 if (entry->compound_member.bitfield) {
2969 return bitfield_extract_to_firm(expression, addr);
2972 return deref_address(dbgi, type, addr);
2975 /* Values returned by __builtin_classify_type. */
2976 typedef enum gcc_type_class
2982 enumeral_type_class,
2985 reference_type_class,
2989 function_type_class,
3000 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3002 type_t *type = expr->type_expression->base.type;
3004 /* FIXME gcc returns different values depending on whether compiling C or C++
3005 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3008 type = skip_typeref(type);
3009 switch (type->kind) {
3011 const atomic_type_t *const atomic_type = &type->atomic;
3012 switch (atomic_type->akind) {
3013 /* gcc cannot do that */
3014 case ATOMIC_TYPE_VOID:
3015 tc = void_type_class;
3018 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3019 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3020 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3021 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3022 case ATOMIC_TYPE_SHORT:
3023 case ATOMIC_TYPE_USHORT:
3024 case ATOMIC_TYPE_INT:
3025 case ATOMIC_TYPE_UINT:
3026 case ATOMIC_TYPE_LONG:
3027 case ATOMIC_TYPE_ULONG:
3028 case ATOMIC_TYPE_LONGLONG:
3029 case ATOMIC_TYPE_ULONGLONG:
3030 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3031 tc = integer_type_class;
3034 case ATOMIC_TYPE_FLOAT:
3035 case ATOMIC_TYPE_DOUBLE:
3036 case ATOMIC_TYPE_LONG_DOUBLE:
3037 tc = real_type_class;
3040 panic("Unexpected atomic type.");
3043 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3044 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3045 case TYPE_ARRAY: /* gcc handles this as pointer */
3046 case TYPE_FUNCTION: /* gcc handles this as pointer */
3047 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3048 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3049 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3051 /* gcc handles this as integer */
3052 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3054 /* gcc classifies the referenced type */
3055 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3057 /* typedef/typeof should be skipped already */
3063 panic("unexpected type.");
3067 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3068 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3069 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3070 return new_d_Const(dbgi, tv);
3073 static ir_node *function_name_to_firm(
3074 const funcname_expression_t *const expr)
3076 switch(expr->kind) {
3077 case FUNCNAME_FUNCTION:
3078 case FUNCNAME_PRETTY_FUNCTION:
3079 case FUNCNAME_FUNCDNAME:
3080 if (current_function_name == NULL) {
3081 position_t const *const src_pos = &expr->base.pos;
3082 char const *const name = current_function_entity->base.symbol->string;
3083 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3084 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3086 return current_function_name;
3087 case FUNCNAME_FUNCSIG:
3088 if (current_funcsig == NULL) {
3089 position_t const *const src_pos = &expr->base.pos;
3090 ir_entity *const ent = get_irg_entity(current_ir_graph);
3091 char const *const name = get_entity_ld_name(ent);
3092 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3093 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3095 return current_funcsig;
3097 panic("Unsupported function name");
3100 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3102 statement_t *statement = expr->statement;
3104 assert(statement->kind == STATEMENT_COMPOUND);
3105 return compound_statement_to_firm(&statement->compound);
3108 static ir_node *va_start_expression_to_firm(
3109 const va_start_expression_t *const expr)
3111 ir_entity *param_ent = current_vararg_entity;
3112 if (param_ent == NULL) {
3113 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3114 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3115 ir_type *const param_type = get_unknown_type();
3116 param_ent = new_parameter_entity(frame_type, n, param_type);
3117 current_vararg_entity = param_ent;
3120 ir_node *const frame = get_irg_frame(current_ir_graph);
3121 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3122 ir_node *const no_mem = new_NoMem();
3123 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3125 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3130 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3132 type_t *const type = expr->base.type;
3133 expression_t *const ap_expr = expr->ap;
3134 ir_node *const ap_addr = expression_to_addr(ap_expr);
3135 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3136 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3137 ir_node *const res = deref_address(dbgi, type, ap);
3139 ir_node *const cnst = get_type_size_node(expr->base.type);
3140 ir_mode *const mode = get_irn_mode(cnst);
3141 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3142 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3143 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3144 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3145 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3147 set_value_for_expression_addr(ap_expr, add, ap_addr);
3153 * Generate Firm for a va_copy expression.
3155 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3157 ir_node *const src = expression_to_firm(expr->src);
3158 set_value_for_expression_addr(expr->dst, src, NULL);
3162 static ir_node *dereference_addr(const unary_expression_t *const expression)
3164 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3165 return expression_to_firm(expression->value);
3169 * Returns a IR-node representing an lvalue of the given expression.
3171 static ir_node *expression_to_addr(const expression_t *expression)
3173 switch(expression->kind) {
3174 case EXPR_ARRAY_ACCESS:
3175 return array_access_addr(&expression->array_access);
3176 case EXPR_COMPOUND_LITERAL:
3177 return compound_literal_addr(&expression->compound_literal);
3178 case EXPR_REFERENCE:
3179 return reference_addr(&expression->reference);
3181 return select_addr(&expression->select);
3182 case EXPR_UNARY_DEREFERENCE:
3183 return dereference_addr(&expression->unary);
3187 panic("trying to get address of non-lvalue");
3190 static ir_node *builtin_constant_to_firm(
3191 const builtin_constant_expression_t *expression)
3193 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3194 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3195 return create_Const_from_bool(mode, v);
3198 static ir_node *builtin_types_compatible_to_firm(
3199 const builtin_types_compatible_expression_t *expression)
3201 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3202 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3203 bool const value = types_compatible(left, right);
3204 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3205 return create_Const_from_bool(mode, value);
3208 static void prepare_label_target(label_t *const label)
3210 if (label->address_taken && !label->indirect_block) {
3211 ir_node *const iblock = new_immBlock();
3212 label->indirect_block = iblock;
3213 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3214 jump_from_block_to_target(&label->target, iblock);
3219 * Pointer to a label. This is used for the
3220 * GNU address-of-label extension.
3222 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3224 /* Beware: Might be called from create initializer with current_ir_graph
3225 * set to const_code_irg. */
3226 PUSH_IRG(current_function);
3227 prepare_label_target(label->label);
3230 symconst_symbol value;
3231 value.entity_p = create_Block_entity(label->label->indirect_block);
3232 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3233 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3237 * creates firm nodes for an expression. The difference between this function
3238 * and expression_to_firm is, that this version might produce mode_b nodes
3239 * instead of mode_Is.
3241 static ir_node *_expression_to_firm(expression_t const *const expr)
3244 if (!constant_folding) {
3245 assert(!expr->base.transformed);
3246 ((expression_t*)expr)->base.transformed = true;
3250 switch (expr->kind) {
3251 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3252 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3253 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3254 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3255 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3256 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3257 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3258 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3259 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3260 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3261 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3262 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3263 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3264 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3265 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3266 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3267 case EXPR_SELECT: return select_to_firm( &expr->select);
3268 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3269 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3270 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3271 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3272 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3273 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3275 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.pos, "str.%u", &expr->string_literal.value);
3277 case EXPR_ERROR: break;
3279 panic("invalid expression");
3283 * Check if a given expression is a GNU __builtin_expect() call.
3285 static bool is_builtin_expect(const expression_t *expression)
3287 if (expression->kind != EXPR_CALL)
3290 expression_t *function = expression->call.function;
3291 if (function->kind != EXPR_REFERENCE)
3293 reference_expression_t *ref = &function->reference;
3294 if (ref->entity->kind != ENTITY_FUNCTION ||
3295 ref->entity->function.btk != BUILTIN_EXPECT)
3301 static bool produces_mode_b(const expression_t *expression)
3303 switch (expression->kind) {
3304 case EXPR_BINARY_EQUAL:
3305 case EXPR_BINARY_NOTEQUAL:
3306 case EXPR_BINARY_LESS:
3307 case EXPR_BINARY_LESSEQUAL:
3308 case EXPR_BINARY_GREATER:
3309 case EXPR_BINARY_GREATEREQUAL:
3310 case EXPR_BINARY_ISGREATER:
3311 case EXPR_BINARY_ISGREATEREQUAL:
3312 case EXPR_BINARY_ISLESS:
3313 case EXPR_BINARY_ISLESSEQUAL:
3314 case EXPR_BINARY_ISLESSGREATER:
3315 case EXPR_BINARY_ISUNORDERED:
3316 case EXPR_UNARY_NOT:
3320 if (is_builtin_expect(expression)) {
3321 expression_t *argument = expression->call.arguments->expression;
3322 return produces_mode_b(argument);
3325 case EXPR_BINARY_COMMA:
3326 return produces_mode_b(expression->binary.right);
3333 static ir_node *expression_to_firm(const expression_t *expression)
3335 if (!produces_mode_b(expression)) {
3336 ir_node *res = _expression_to_firm(expression);
3337 assert(res == NULL || get_irn_mode(res) != mode_b);
3341 /* we have to produce a 0/1 from the mode_b expression */
3342 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3343 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3344 return produce_condition_result(expression, mode, dbgi);
3348 * create a short-circuit expression evaluation that tries to construct
3349 * efficient control flow structures for &&, || and ! expressions
3351 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3353 switch(expression->kind) {
3354 case EXPR_UNARY_NOT: {
3355 const unary_expression_t *unary_expression = &expression->unary;
3356 create_condition_evaluation(unary_expression->value, false_target, true_target);
3359 case EXPR_BINARY_LOGICAL_AND: {
3360 jump_target extra_target;
3361 init_jump_target(&extra_target, NULL);
3362 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3363 if (enter_jump_target(&extra_target))
3364 create_condition_evaluation(expression->binary.right, true_target, false_target);
3367 case EXPR_BINARY_LOGICAL_OR: {
3368 jump_target extra_target;
3369 init_jump_target(&extra_target, NULL);
3370 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3371 if (enter_jump_target(&extra_target))
3372 create_condition_evaluation(expression->binary.right, true_target, false_target);
3379 ir_node *cond_expr = _expression_to_firm(expression);
3380 if (is_Const(cond_expr)) {
3381 if (tarval_is_null(get_Const_tarval(cond_expr))) {
3382 jump_to_target(false_target);
3384 jump_to_target(true_target);
3387 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3388 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3389 ir_node *cond = new_d_Cond(dbgi, condition);
3390 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3391 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3393 /* set branch prediction info based on __builtin_expect */
3394 if (is_builtin_expect(expression) && is_Cond(cond)) {
3395 call_argument_t *argument = expression->call.arguments->next;
3396 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3397 bool const cnst = fold_constant_to_bool(argument->expression);
3398 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3399 set_Cond_jmp_pred(cond, pred);
3403 add_pred_to_jump_target(true_target, true_proj);
3404 add_pred_to_jump_target(false_target, false_proj);
3406 set_unreachable_now();
3410 static void create_variable_entity(entity_t *variable,
3411 declaration_kind_t declaration_kind,
3412 ir_type *parent_type)
3414 assert(variable->kind == ENTITY_VARIABLE);
3415 type_t *type = skip_typeref(variable->declaration.type);
3417 ident *const id = new_id_from_str(variable->base.symbol->string);
3418 ir_type *const irtype = get_ir_type(type);
3419 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
3420 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3421 unsigned alignment = variable->declaration.alignment;
3423 set_entity_alignment(irentity, alignment);
3425 handle_decl_modifiers(irentity, variable);
3427 variable->declaration.kind = (unsigned char) declaration_kind;
3428 variable->variable.v.entity = irentity;
3429 set_entity_ld_ident(irentity, create_ld_ident(variable));
3431 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3432 set_entity_volatility(irentity, volatility_is_volatile);
3437 typedef struct type_path_entry_t type_path_entry_t;
3438 struct type_path_entry_t {
3440 ir_initializer_t *initializer;
3442 entity_t *compound_entry;
3445 typedef struct type_path_t type_path_t;
3446 struct type_path_t {
3447 type_path_entry_t *path;
3452 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3454 size_t len = ARR_LEN(path->path);
3456 for (size_t i = 0; i < len; ++i) {
3457 const type_path_entry_t *entry = & path->path[i];
3459 type_t *type = skip_typeref(entry->type);
3460 if (is_type_compound(type)) {
3461 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3462 } else if (is_type_array(type)) {
3463 fprintf(stderr, "[%u]", (unsigned) entry->index);
3465 fprintf(stderr, "-INVALID-");
3468 fprintf(stderr, " (");
3469 print_type(path->top_type);
3470 fprintf(stderr, ")");
3473 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3475 size_t len = ARR_LEN(path->path);
3477 return & path->path[len-1];
3480 static type_path_entry_t *append_to_type_path(type_path_t *path)
3482 size_t len = ARR_LEN(path->path);
3483 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3485 type_path_entry_t *result = & path->path[len];
3486 memset(result, 0, sizeof(result[0]));
3490 static size_t get_compound_member_count(const compound_type_t *type)
3492 compound_t *compound = type->compound;
3493 size_t n_members = 0;
3494 entity_t *member = compound->members.entities;
3495 for ( ; member != NULL; member = member->base.next) {
3502 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3504 type_t *orig_top_type = path->top_type;
3505 type_t *top_type = skip_typeref(orig_top_type);
3507 assert(is_type_compound(top_type) || is_type_array(top_type));
3509 if (ARR_LEN(path->path) == 0) {
3512 type_path_entry_t *top = get_type_path_top(path);
3513 ir_initializer_t *initializer = top->initializer;
3514 return get_initializer_compound_value(initializer, top->index);
3518 static void descend_into_subtype(type_path_t *path)
3520 type_t *orig_top_type = path->top_type;
3521 type_t *top_type = skip_typeref(orig_top_type);
3523 assert(is_type_compound(top_type) || is_type_array(top_type));
3525 ir_initializer_t *initializer = get_initializer_entry(path);
3527 type_path_entry_t *top = append_to_type_path(path);
3528 top->type = top_type;
3532 if (is_type_compound(top_type)) {
3533 compound_t *const compound = top_type->compound.compound;
3534 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3536 top->compound_entry = entry;
3538 len = get_compound_member_count(&top_type->compound);
3539 if (entry != NULL) {
3540 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3541 path->top_type = entry->declaration.type;
3544 assert(is_type_array(top_type));
3545 assert(top_type->array.size > 0);
3548 path->top_type = top_type->array.element_type;
3549 len = top_type->array.size;
3551 if (initializer == NULL
3552 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3553 initializer = create_initializer_compound(len);
3554 /* we have to set the entry at the 2nd latest path entry... */
3555 size_t path_len = ARR_LEN(path->path);
3556 assert(path_len >= 1);
3558 type_path_entry_t *entry = & path->path[path_len-2];
3559 ir_initializer_t *tinitializer = entry->initializer;
3560 set_initializer_compound_value(tinitializer, entry->index,
3564 top->initializer = initializer;
3567 static void ascend_from_subtype(type_path_t *path)
3569 type_path_entry_t *top = get_type_path_top(path);
3571 path->top_type = top->type;
3573 size_t len = ARR_LEN(path->path);
3574 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3577 static void walk_designator(type_path_t *path, const designator_t *designator)
3579 /* designators start at current object type */
3580 ARR_RESIZE(type_path_entry_t, path->path, 1);
3582 for ( ; designator != NULL; designator = designator->next) {
3583 type_path_entry_t *top = get_type_path_top(path);
3584 type_t *orig_type = top->type;
3585 type_t *type = skip_typeref(orig_type);
3587 if (designator->symbol != NULL) {
3588 assert(is_type_compound(type));
3590 symbol_t *symbol = designator->symbol;
3592 compound_t *compound = type->compound.compound;
3593 entity_t *iter = compound->members.entities;
3594 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3595 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3597 /* revert previous initialisations of other union elements */
3598 if (type->kind == TYPE_COMPOUND_UNION) {
3599 ir_initializer_t *initializer = top->initializer;
3600 if (initializer != NULL
3601 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3602 /* are we writing to a new element? */
3603 ir_initializer_t *oldi
3604 = get_initializer_compound_value(initializer, index);
3605 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3606 /* clear initializer */
3608 = get_initializer_compound_n_entries(initializer);
3609 ir_initializer_t *nulli = get_initializer_null();
3610 for (size_t i = 0; i < len; ++i) {
3611 set_initializer_compound_value(initializer, i,
3618 top->type = orig_type;
3619 top->compound_entry = iter;
3621 orig_type = iter->declaration.type;
3623 expression_t *array_index = designator->array_index;
3624 assert(is_type_array(type));
3626 long index = fold_constant_to_int(array_index);
3627 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3629 top->type = orig_type;
3630 top->index = (size_t) index;
3631 orig_type = type->array.element_type;
3633 path->top_type = orig_type;
3635 if (designator->next != NULL) {
3636 descend_into_subtype(path);
3640 path->invalid = false;
3643 static void advance_current_object(type_path_t *path)
3645 if (path->invalid) {
3646 /* TODO: handle this... */
3647 panic("invalid initializer (excessive elements)");
3650 type_path_entry_t *top = get_type_path_top(path);
3652 type_t *type = skip_typeref(top->type);
3653 if (is_type_union(type)) {
3654 /* only the first element is initialized in unions */
3655 top->compound_entry = NULL;
3656 } else if (is_type_struct(type)) {
3657 entity_t *entry = top->compound_entry;
3660 entry = skip_unnamed_bitfields(entry->base.next);
3661 top->compound_entry = entry;
3662 if (entry != NULL) {
3663 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3664 path->top_type = entry->declaration.type;
3668 assert(is_type_array(type));
3671 if (!type->array.size_constant || top->index < type->array.size) {
3676 /* we're past the last member of the current sub-aggregate, try if we
3677 * can ascend in the type hierarchy and continue with another subobject */
3678 size_t len = ARR_LEN(path->path);
3681 ascend_from_subtype(path);
3682 advance_current_object(path);
3684 path->invalid = true;
3689 static ir_initializer_t *create_ir_initializer_value(
3690 const initializer_value_t *initializer)
3692 expression_t *expr = initializer->value;
3693 type_t *type = skip_typeref(expr->base.type);
3695 if (is_type_compound(type)) {
3696 if (expr->kind == EXPR_UNARY_CAST) {
3697 expr = expr->unary.value;
3698 type = skip_typeref(expr->base.type);
3700 /* must be a compound literal... */
3701 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3702 return create_ir_initializer(expr->compound_literal.initializer,
3707 ir_node *value = expression_to_firm(expr);
3708 value = conv_to_storage_type(NULL, value, type);
3709 return create_initializer_const(value);
3712 /** Tests whether type can be initialized by a string constant */
3713 static bool is_string_type(type_t *type)
3715 if (!is_type_array(type))
3718 type_t *const inner = skip_typeref(type->array.element_type);
3719 return is_type_integer(inner);
3722 static ir_initializer_t *create_ir_initializer_list(
3723 const initializer_list_t *initializer, type_t *type)
3726 memset(&path, 0, sizeof(path));
3727 path.top_type = type;
3728 path.path = NEW_ARR_F(type_path_entry_t, 0);
3730 descend_into_subtype(&path);
3732 for (size_t i = 0; i < initializer->len; ++i) {
3733 const initializer_t *sub_initializer = initializer->initializers[i];
3735 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3736 walk_designator(&path, sub_initializer->designator.designator);
3740 if (sub_initializer->kind == INITIALIZER_VALUE) {
3741 const expression_t *expr = sub_initializer->value.value;
3742 const type_t *expr_type = skip_typeref(expr->base.type);
3743 /* we might have to descend into types until the types match */
3745 type_t *orig_top_type = path.top_type;
3746 type_t *top_type = skip_typeref(orig_top_type);
3748 if (types_compatible(top_type, expr_type))
3750 descend_into_subtype(&path);
3752 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3753 /* we might have to descend into types until we're at a scalar
3756 type_t *orig_top_type = path.top_type;
3757 type_t *top_type = skip_typeref(orig_top_type);
3759 if (is_string_type(top_type))
3761 descend_into_subtype(&path);
3765 ir_initializer_t *sub_irinitializer
3766 = create_ir_initializer(sub_initializer, path.top_type);
3768 size_t path_len = ARR_LEN(path.path);
3769 assert(path_len >= 1);
3770 type_path_entry_t *entry = & path.path[path_len-1];
3771 ir_initializer_t *tinitializer = entry->initializer;
3772 set_initializer_compound_value(tinitializer, entry->index,
3775 advance_current_object(&path);
3778 assert(ARR_LEN(path.path) >= 1);
3779 ir_initializer_t *result = path.path[0].initializer;
3780 DEL_ARR_F(path.path);
3785 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3787 type = skip_typeref(type);
3789 assert(type->kind == TYPE_ARRAY);
3790 assert(type->array.size_constant);
3791 string_literal_expression_t const *const str = get_init_string(init);
3792 size_t const str_len = str->value.size;
3793 size_t const arr_len = type->array.size;
3794 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3795 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3796 char const * p = str->value.begin;
3797 switch (str->value.encoding) {
3798 case STRING_ENCODING_CHAR:
3799 case STRING_ENCODING_UTF8:
3800 for (size_t i = 0; i != arr_len; ++i) {
3801 char const c = i < str_len ? *p++ : 0;
3802 ir_tarval *const tv = new_tarval_from_long(c, mode);
3803 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3804 set_initializer_compound_value(irinit, i, tvinit);
3808 case STRING_ENCODING_CHAR16:
3809 case STRING_ENCODING_CHAR32:
3810 case STRING_ENCODING_WIDE:
3811 for (size_t i = 0; i != arr_len; ++i) {
3812 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3813 ir_tarval *const tv = new_tarval_from_long(c, mode);
3814 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3815 set_initializer_compound_value(irinit, i, tvinit);
3823 static ir_initializer_t *create_ir_initializer(
3824 const initializer_t *initializer, type_t *type)
3826 switch(initializer->kind) {
3827 case INITIALIZER_STRING:
3828 return create_ir_initializer_string(initializer, type);
3830 case INITIALIZER_LIST:
3831 return create_ir_initializer_list(&initializer->list, type);
3833 case INITIALIZER_VALUE:
3834 return create_ir_initializer_value(&initializer->value);
3836 case INITIALIZER_DESIGNATOR:
3837 panic("unexpected designator initializer");
3839 panic("unknown initializer");
3842 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3843 * are elements [...] the remainder of the aggregate shall be initialized
3844 * implicitly the same as objects that have static storage duration. */
3845 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3848 /* for unions we must NOT do anything for null initializers */
3849 ir_type *owner = get_entity_owner(entity);
3850 if (is_Union_type(owner)) {
3854 ir_type *ent_type = get_entity_type(entity);
3855 /* create sub-initializers for a compound type */
3856 if (is_compound_type(ent_type)) {
3857 unsigned n_members = get_compound_n_members(ent_type);
3858 for (unsigned n = 0; n < n_members; ++n) {
3859 ir_entity *member = get_compound_member(ent_type, n);
3860 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3862 create_dynamic_null_initializer(member, dbgi, addr);
3866 if (is_Array_type(ent_type)) {
3867 assert(has_array_upper_bound(ent_type, 0));
3868 long n = get_array_upper_bound_int(ent_type, 0);
3869 for (long i = 0; i < n; ++i) {
3870 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3871 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3872 ir_node *cnst = new_d_Const(dbgi, index_tv);
3873 ir_node *in[1] = { cnst };
3874 ir_entity *arrent = get_array_element_entity(ent_type);
3875 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3877 create_dynamic_null_initializer(arrent, dbgi, addr);
3882 ir_mode *value_mode = get_type_mode(ent_type);
3883 ir_node *node = new_Const(get_mode_null(value_mode));
3885 /* is it a bitfield type? */
3886 if (is_Primitive_type(ent_type) &&
3887 get_primitive_base_type(ent_type) != NULL) {
3888 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3892 ir_node *mem = get_store();
3893 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3894 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3898 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3899 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3901 switch(get_initializer_kind(initializer)) {
3902 case IR_INITIALIZER_NULL:
3903 create_dynamic_null_initializer(entity, dbgi, base_addr);
3905 case IR_INITIALIZER_CONST: {
3906 ir_node *node = get_initializer_const_value(initializer);
3907 ir_type *ent_type = get_entity_type(entity);
3909 /* is it a bitfield type? */
3910 if (is_Primitive_type(ent_type) &&
3911 get_primitive_base_type(ent_type) != NULL) {
3912 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3916 ir_node *mem = get_store();
3918 if (is_compound_type(ent_type)) {
3919 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3920 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3922 assert(get_type_mode(type) == get_irn_mode(node));
3923 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3924 new_mem = new_Proj(store, mode_M, pn_Store_M);
3929 case IR_INITIALIZER_TARVAL: {
3930 ir_tarval *tv = get_initializer_tarval_value(initializer);
3931 ir_node *cnst = new_d_Const(dbgi, tv);
3932 ir_type *ent_type = get_entity_type(entity);
3934 /* is it a bitfield type? */
3935 if (is_Primitive_type(ent_type) &&
3936 get_primitive_base_type(ent_type) != NULL) {
3937 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3941 assert(get_type_mode(type) == get_tarval_mode(tv));
3942 ir_node *mem = get_store();
3943 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3944 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3948 case IR_INITIALIZER_COMPOUND: {
3949 assert(is_compound_type(type) || is_Array_type(type));
3951 if (is_Array_type(type)) {
3952 assert(has_array_upper_bound(type, 0));
3953 n_members = get_array_upper_bound_int(type, 0);
3955 n_members = get_compound_n_members(type);
3958 if (get_initializer_compound_n_entries(initializer)
3959 != (unsigned) n_members)
3960 panic("initializer doesn't match compound type");
3962 for (int i = 0; i < n_members; ++i) {
3965 ir_entity *sub_entity;
3966 if (is_Array_type(type)) {
3967 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3968 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3969 ir_node *cnst = new_d_Const(dbgi, index_tv);
3970 ir_node *in[1] = { cnst };
3971 irtype = get_array_element_type(type);
3972 sub_entity = get_array_element_entity(type);
3973 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3976 sub_entity = get_compound_member(type, i);
3977 irtype = get_entity_type(sub_entity);
3978 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3982 ir_initializer_t *sub_init
3983 = get_initializer_compound_value(initializer, i);
3985 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3992 panic("invalid ir_initializer");
3995 static void create_dynamic_initializer(ir_initializer_t *initializer,
3996 dbg_info *dbgi, ir_entity *entity)
3998 ir_node *frame = get_irg_frame(current_ir_graph);
3999 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4000 ir_type *type = get_entity_type(entity);
4002 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4005 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4006 ir_entity *entity, type_t *type)
4008 ir_node *memory = get_store();
4009 ir_node *nomem = new_NoMem();
4010 ir_node *frame = get_irg_frame(current_ir_graph);
4011 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4013 if (initializer->kind == INITIALIZER_VALUE) {
4014 initializer_value_t *initializer_value = &initializer->value;
4016 ir_node *value = expression_to_firm(initializer_value->value);
4017 type = skip_typeref(type);
4018 assign_value(dbgi, addr, type, value);
4022 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4023 ir_initializer_t *irinitializer
4024 = create_ir_initializer(initializer, type);
4026 create_dynamic_initializer(irinitializer, dbgi, entity);
4030 /* create a "template" entity which is copied to the entity on the stack */
4031 ir_entity *const init_entity
4032 = create_initializer_entity(dbgi, initializer, type);
4033 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4034 ir_type *const irtype = get_ir_type(type);
4035 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4037 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4038 set_store(copyb_mem);
4041 static void create_initializer_local_variable_entity(entity_t *entity)
4043 assert(entity->kind == ENTITY_VARIABLE);
4044 initializer_t *initializer = entity->variable.initializer;
4045 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4046 ir_entity *irentity = entity->variable.v.entity;
4047 type_t *type = entity->declaration.type;
4049 create_local_initializer(initializer, dbgi, irentity, type);
4052 static void create_variable_initializer(entity_t *entity)
4054 assert(entity->kind == ENTITY_VARIABLE);
4055 initializer_t *initializer = entity->variable.initializer;
4056 if (initializer == NULL)
4059 declaration_kind_t declaration_kind
4060 = (declaration_kind_t) entity->declaration.kind;
4061 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4062 create_initializer_local_variable_entity(entity);
4066 type_t *type = entity->declaration.type;
4067 type_qualifiers_t tq = get_type_qualifier(type, true);
4069 if (initializer->kind == INITIALIZER_VALUE) {
4070 expression_t * value = initializer->value.value;
4071 type_t *const init_type = skip_typeref(value->base.type);
4073 if (!is_type_scalar(init_type)) {
4074 if (value->kind != EXPR_COMPOUND_LITERAL)
4075 panic("expected non-scalar initializer to be a compound literal");
4076 initializer = value->compound_literal.initializer;
4077 goto have_initializer;
4080 ir_node * node = expression_to_firm(value);
4081 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4082 node = conv_to_storage_type(dbgi, node, init_type);
4084 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4085 set_value(entity->variable.v.value_number, node);
4087 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4089 ir_entity *irentity = entity->variable.v.entity;
4091 if (tq & TYPE_QUALIFIER_CONST
4092 && get_entity_owner(irentity) != get_tls_type()) {
4093 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4095 set_atomic_ent_value(irentity, node);
4099 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4100 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4102 ir_entity *irentity = entity->variable.v.entity;
4103 ir_initializer_t *irinitializer
4104 = create_ir_initializer(initializer, type);
4106 if (tq & TYPE_QUALIFIER_CONST) {
4107 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4109 set_entity_initializer(irentity, irinitializer);
4113 static void create_variable_length_array(entity_t *entity)
4115 assert(entity->kind == ENTITY_VARIABLE);
4116 assert(entity->variable.initializer == NULL);
4118 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4119 entity->variable.v.vla_base = NULL;
4121 /* TODO: record VLA somewhere so we create the free node when we leave
4125 static void allocate_variable_length_array(entity_t *entity)
4127 assert(entity->kind == ENTITY_VARIABLE);
4128 assert(entity->variable.initializer == NULL);
4129 assert(currently_reachable());
4131 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4132 type_t *type = entity->declaration.type;
4133 ir_type *el_type = get_ir_type(type->array.element_type);
4135 /* make sure size_node is calculated */
4136 get_type_size_node(type);
4137 ir_node *elems = type->array.size_node;
4138 ir_node *mem = get_store();
4139 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4141 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4142 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4145 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4146 entity->variable.v.vla_base = addr;
4149 static bool var_needs_entity(variable_t const *const var)
4151 if (var->address_taken)
4153 type_t *const type = skip_typeref(var->base.type);
4154 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4158 * Creates a Firm local variable from a declaration.
4160 static void create_local_variable(entity_t *entity)
4162 assert(entity->kind == ENTITY_VARIABLE);
4163 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4165 if (!var_needs_entity(&entity->variable)) {
4166 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4167 entity->variable.v.value_number = next_value_number_function;
4168 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4169 ++next_value_number_function;
4173 /* is it a variable length array? */
4174 type_t *const type = skip_typeref(entity->declaration.type);
4175 if (is_type_array(type) && !type->array.size_constant) {
4176 create_variable_length_array(entity);
4180 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4181 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4184 static void create_local_static_variable(entity_t *entity)
4186 assert(entity->kind == ENTITY_VARIABLE);
4187 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4189 type_t *type = skip_typeref(entity->declaration.type);
4190 ir_type *const var_type = entity->variable.thread_local ?
4191 get_tls_type() : get_glob_type();
4192 ir_type *const irtype = get_ir_type(type);
4193 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4195 size_t l = strlen(entity->base.symbol->string);
4196 char buf[l + sizeof(".%u")];
4197 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4198 ident *const id = id_unique(buf);
4199 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4201 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4202 set_entity_volatility(irentity, volatility_is_volatile);
4205 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4206 entity->variable.v.entity = irentity;
4208 set_entity_ld_ident(irentity, id);
4209 set_entity_visibility(irentity, ir_visibility_local);
4211 if (entity->variable.initializer == NULL) {
4212 ir_initializer_t *null_init = get_initializer_null();
4213 set_entity_initializer(irentity, null_init);
4216 PUSH_IRG(get_const_code_irg());
4217 create_variable_initializer(entity);
4223 static ir_node *return_statement_to_firm(return_statement_t *statement)
4225 if (!currently_reachable())
4228 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4229 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4230 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4233 if (!is_type_void(type)) {
4235 res = conv_to_storage_type(dbgi, res, type);
4237 res = new_Unknown(get_ir_mode_storage(type));
4244 ir_node *const in[1] = { res };
4245 ir_node *const store = get_store();
4246 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4248 ir_node *end_block = get_irg_end_block(current_ir_graph);
4249 add_immBlock_pred(end_block, ret);
4251 set_unreachable_now();
4255 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4257 if (!currently_reachable())
4260 return expression_to_firm(statement->expression);
4263 static void create_local_declarations(entity_t*);
4265 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4267 create_local_declarations(compound->scope.entities);
4269 ir_node *result = NULL;
4270 statement_t *statement = compound->statements;
4271 for ( ; statement != NULL; statement = statement->base.next) {
4272 result = statement_to_firm(statement);
4278 static void create_global_variable(entity_t *entity)
4280 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4281 ir_visibility visibility = ir_visibility_external;
4282 storage_class_tag_t storage
4283 = (storage_class_tag_t)entity->declaration.storage_class;
4284 decl_modifiers_t modifiers = entity->declaration.modifiers;
4285 assert(entity->kind == ENTITY_VARIABLE);
4288 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4289 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4290 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4291 case STORAGE_CLASS_TYPEDEF:
4292 case STORAGE_CLASS_AUTO:
4293 case STORAGE_CLASS_REGISTER:
4294 panic("invalid storage class for global var");
4297 /* "common" symbols */
4298 if (storage == STORAGE_CLASS_NONE
4299 && entity->variable.initializer == NULL
4300 && !entity->variable.thread_local
4301 && (modifiers & DM_WEAK) == 0) {
4302 linkage |= IR_LINKAGE_MERGE;
4305 ir_type *var_type = get_glob_type();
4306 if (entity->variable.thread_local) {
4307 var_type = get_tls_type();
4309 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4310 ir_entity *irentity = entity->variable.v.entity;
4311 add_entity_linkage(irentity, linkage);
4312 set_entity_visibility(irentity, visibility);
4313 if (entity->variable.initializer == NULL
4314 && storage != STORAGE_CLASS_EXTERN) {
4315 ir_initializer_t *null_init = get_initializer_null();
4316 set_entity_initializer(irentity, null_init);
4320 static void create_local_declaration(entity_t *entity)
4322 assert(is_declaration(entity));
4324 /* construct type */
4325 (void) get_ir_type(entity->declaration.type);
4326 if (entity->base.symbol == NULL) {
4330 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4331 case STORAGE_CLASS_STATIC:
4332 if (entity->kind == ENTITY_FUNCTION) {
4333 (void)get_function_entity(entity, NULL);
4335 create_local_static_variable(entity);
4338 case STORAGE_CLASS_EXTERN:
4339 if (entity->kind == ENTITY_FUNCTION) {
4340 assert(entity->function.body == NULL);
4341 (void)get_function_entity(entity, NULL);
4343 create_global_variable(entity);
4344 create_variable_initializer(entity);
4347 case STORAGE_CLASS_NONE:
4348 case STORAGE_CLASS_AUTO:
4349 case STORAGE_CLASS_REGISTER:
4350 if (entity->kind == ENTITY_FUNCTION) {
4351 if (entity->function.body != NULL) {
4352 ir_type *owner = get_irg_frame_type(current_ir_graph);
4353 (void)get_function_entity(entity, owner);
4354 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4355 enqueue_inner_function(entity);
4357 (void)get_function_entity(entity, NULL);
4360 create_local_variable(entity);
4363 case STORAGE_CLASS_TYPEDEF:
4366 panic("invalid storage class");
4369 static void create_local_declarations(entity_t *e)
4371 for (; e; e = e->base.next) {
4372 if (is_declaration(e))
4373 create_local_declaration(e);
4377 static void initialize_local_declaration(entity_t *entity)
4379 if (entity->base.symbol == NULL)
4382 // no need to emit code in dead blocks
4383 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4384 && !currently_reachable())
4387 switch ((declaration_kind_t) entity->declaration.kind) {
4388 case DECLARATION_KIND_LOCAL_VARIABLE:
4389 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4390 create_variable_initializer(entity);
4393 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4394 allocate_variable_length_array(entity);
4397 case DECLARATION_KIND_COMPOUND_MEMBER:
4398 case DECLARATION_KIND_GLOBAL_VARIABLE:
4399 case DECLARATION_KIND_FUNCTION:
4400 case DECLARATION_KIND_INNER_FUNCTION:
4403 case DECLARATION_KIND_PARAMETER:
4404 case DECLARATION_KIND_PARAMETER_ENTITY:
4405 panic("can't initialize parameters");
4407 case DECLARATION_KIND_UNKNOWN:
4408 panic("can't initialize unknown declaration");
4410 panic("invalid declaration kind");
4413 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4415 entity_t *entity = statement->declarations_begin;
4419 entity_t *const last = statement->declarations_end;
4420 for ( ;; entity = entity->base.next) {
4421 if (is_declaration(entity)) {
4422 initialize_local_declaration(entity);
4423 } else if (entity->kind == ENTITY_TYPEDEF) {
4424 /* ยง6.7.7:3 Any array size expressions associated with variable length
4425 * array declarators are evaluated each time the declaration of the
4426 * typedef name is reached in the order of execution. */
4427 type_t *const type = skip_typeref(entity->typedefe.type);
4428 if (is_type_array(type) && type->array.is_vla)
4429 get_vla_size(&type->array);
4438 static ir_node *if_statement_to_firm(if_statement_t *statement)
4440 create_local_declarations(statement->scope.entities);
4442 /* Create the condition. */
4443 jump_target true_target;
4444 jump_target false_target;
4445 init_jump_target(&true_target, NULL);
4446 init_jump_target(&false_target, NULL);
4447 if (currently_reachable())
4448 create_condition_evaluation(statement->condition, &true_target, &false_target);
4450 jump_target exit_target;
4451 init_jump_target(&exit_target, NULL);
4453 /* Create the true statement. */
4454 enter_jump_target(&true_target);
4455 statement_to_firm(statement->true_statement);
4456 jump_to_target(&exit_target);
4458 /* Create the false statement. */
4459 enter_jump_target(&false_target);
4460 if (statement->false_statement)
4461 statement_to_firm(statement->false_statement);
4462 jump_to_target(&exit_target);
4464 enter_jump_target(&exit_target);
4468 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4470 create_local_declarations(statement->scope.entities);
4473 PUSH_CONTINUE(NULL);
4475 expression_t *const cond = statement->condition;
4476 /* Avoid an explicit body block in case of do ... while (0);. */
4477 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4478 /* do ... while (0);. */
4479 statement_to_firm(statement->body);
4480 jump_to_target(&continue_target);
4481 enter_jump_target(&continue_target);
4482 jump_to_target(&break_target);
4484 jump_target body_target;
4485 init_jump_target(&body_target, NULL);
4486 jump_to_target(&body_target);
4487 enter_immature_jump_target(&body_target);
4489 statement_to_firm(statement->body);
4490 jump_to_target(&continue_target);
4491 if (enter_jump_target(&continue_target))
4492 create_condition_evaluation(statement->condition, &body_target, &break_target);
4493 enter_jump_target(&body_target);
4495 enter_jump_target(&break_target);
4502 static ir_node *for_statement_to_firm(for_statement_t *statement)
4504 create_local_declarations(statement->scope.entities);
4506 if (currently_reachable()) {
4507 entity_t *entity = statement->scope.entities;
4508 for ( ; entity != NULL; entity = entity->base.next) {
4509 if (!is_declaration(entity))
4512 initialize_local_declaration(entity);
4515 if (statement->initialisation != NULL) {
4516 expression_to_firm(statement->initialisation);
4520 /* Create the header block */
4521 jump_target header_target;
4522 init_jump_target(&header_target, NULL);
4523 jump_to_target(&header_target);
4524 enter_immature_jump_target(&header_target);
4527 expression_t *const step = statement->step;
4529 PUSH_CONTINUE(step ? NULL : header_target.block);
4531 /* Create the condition. */
4532 expression_t *const cond = statement->condition;
4533 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4534 jump_target body_target;
4535 init_jump_target(&body_target, NULL);
4536 create_condition_evaluation(cond, &body_target, &break_target);
4537 enter_jump_target(&body_target);
4540 /* Create the loop body. */
4541 statement_to_firm(statement->body);
4542 jump_to_target(&continue_target);
4544 /* Create the step code. */
4545 if (step && enter_jump_target(&continue_target)) {
4546 expression_to_firm(step);
4547 jump_to_target(&header_target);
4550 enter_jump_target(&header_target);
4551 enter_jump_target(&break_target);
4558 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4560 /* determine number of cases */
4562 for (case_label_statement_t *l = statement->first_case; l != NULL;
4565 if (l->expression == NULL)
4567 if (l->is_empty_range)
4572 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4574 for (case_label_statement_t *l = statement->first_case; l != NULL;
4576 if (l->expression == NULL) {
4577 l->pn = pn_Switch_default;
4580 if (l->is_empty_range)
4582 ir_tarval *min = l->first_case;
4583 ir_tarval *max = l->last_case;
4584 long pn = (long) i+1;
4585 ir_switch_table_set(res, i++, min, max, pn);
4591 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4593 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4594 ir_node *switch_node = NULL;
4596 if (currently_reachable()) {
4597 ir_node *expression = expression_to_firm(statement->expression);
4598 ir_switch_table *table = create_switch_table(statement);
4599 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4601 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4604 set_unreachable_now();
4607 ir_node *const old_switch = current_switch;
4608 const bool old_saw_default_label = saw_default_label;
4609 saw_default_label = false;
4610 current_switch = switch_node;
4612 statement_to_firm(statement->body);
4613 jump_to_target(&break_target);
4615 if (!saw_default_label && switch_node) {
4616 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4617 add_pred_to_jump_target(&break_target, proj);
4620 enter_jump_target(&break_target);
4622 assert(current_switch == switch_node);
4623 current_switch = old_switch;
4624 saw_default_label = old_saw_default_label;
4629 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4631 if (current_switch != NULL && !statement->is_empty_range) {
4632 jump_target case_target;
4633 init_jump_target(&case_target, NULL);
4635 /* Fallthrough from previous case */
4636 jump_to_target(&case_target);
4638 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4639 add_pred_to_jump_target(&case_target, proj);
4640 if (statement->expression == NULL)
4641 saw_default_label = true;
4643 enter_jump_target(&case_target);
4646 return statement_to_firm(statement->statement);
4649 static ir_node *label_to_firm(const label_statement_t *statement)
4651 label_t *const label = statement->label;
4652 prepare_label_target(label);
4653 jump_to_target(&label->target);
4654 if (--label->n_users == 0) {
4655 enter_jump_target(&label->target);
4657 enter_immature_jump_target(&label->target);
4661 return statement_to_firm(statement->statement);
4664 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4666 label_t *const label = stmt->label;
4667 prepare_label_target(label);
4668 jump_to_target(&label->target);
4669 if (--label->n_users == 0)
4670 enter_jump_target(&label->target);
4671 set_unreachable_now();
4675 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4677 if (currently_reachable()) {
4678 ir_node *const op = expression_to_firm(statement->expression);
4679 ARR_APP1(ir_node*, ijmp_ops, op);
4680 jump_to_target(&ijmp_target);
4681 set_unreachable_now();
4686 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4688 bool needs_memory = statement->is_volatile;
4689 size_t n_clobbers = 0;
4690 asm_clobber_t *clobber = statement->clobbers;
4691 for ( ; clobber != NULL; clobber = clobber->next) {
4692 const char *clobber_str = clobber->clobber.begin;
4694 if (!be_is_valid_clobber(clobber_str)) {
4695 errorf(&statement->base.pos,
4696 "invalid clobber '%s' specified", clobber->clobber);
4700 if (streq(clobber_str, "memory")) {
4701 needs_memory = true;
4705 ident *id = new_id_from_str(clobber_str);
4706 obstack_ptr_grow(&asm_obst, id);
4709 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4710 ident **clobbers = NULL;
4711 if (n_clobbers > 0) {
4712 clobbers = obstack_finish(&asm_obst);
4715 size_t n_inputs = 0;
4716 asm_argument_t *argument = statement->inputs;
4717 for ( ; argument != NULL; argument = argument->next)
4719 size_t n_outputs = 0;
4720 argument = statement->outputs;
4721 for ( ; argument != NULL; argument = argument->next)
4724 unsigned next_pos = 0;
4726 ir_node *ins[n_inputs + n_outputs + 1];
4729 ir_asm_constraint tmp_in_constraints[n_outputs];
4731 const expression_t *out_exprs[n_outputs];
4732 ir_node *out_addrs[n_outputs];
4733 size_t out_size = 0;
4735 argument = statement->outputs;
4736 for ( ; argument != NULL; argument = argument->next) {
4737 const char *constraints = argument->constraints.begin;
4738 asm_constraint_flags_t asm_flags
4739 = be_parse_asm_constraints(constraints);
4742 position_t const *const pos = &statement->base.pos;
4743 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4744 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4746 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4747 errorf(pos, "some constraints in '%s' are invalid", constraints);
4750 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4751 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4756 unsigned pos = next_pos++;
4757 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4758 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4759 expression_t *expr = argument->expression;
4760 ir_node *addr = expression_to_addr(expr);
4761 /* in+output, construct an artifical same_as constraint on the
4763 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4765 ir_node *value = get_value_from_lvalue(expr, addr);
4767 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4769 ir_asm_constraint constraint;
4770 constraint.pos = pos;
4771 constraint.constraint = new_id_from_str(buf);
4772 constraint.mode = get_ir_mode_storage(expr->base.type);
4773 tmp_in_constraints[in_size] = constraint;
4774 ins[in_size] = value;
4779 out_exprs[out_size] = expr;
4780 out_addrs[out_size] = addr;
4782 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4783 /* pure memory ops need no input (but we have to make sure we
4784 * attach to the memory) */
4785 assert(! (asm_flags &
4786 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4787 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4788 needs_memory = true;
4790 /* we need to attach the address to the inputs */
4791 expression_t *expr = argument->expression;
4793 ir_asm_constraint constraint;
4794 constraint.pos = pos;
4795 constraint.constraint = new_id_from_str(constraints);
4796 constraint.mode = mode_M;
4797 tmp_in_constraints[in_size] = constraint;
4799 ins[in_size] = expression_to_addr(expr);
4803 errorf(&statement->base.pos,
4804 "only modifiers but no place set in constraints '%s'",
4809 ir_asm_constraint constraint;
4810 constraint.pos = pos;
4811 constraint.constraint = new_id_from_str(constraints);
4812 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4814 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4816 assert(obstack_object_size(&asm_obst)
4817 == out_size * sizeof(ir_asm_constraint));
4818 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4821 obstack_grow(&asm_obst, tmp_in_constraints,
4822 in_size * sizeof(tmp_in_constraints[0]));
4823 /* find and count input and output arguments */
4824 argument = statement->inputs;
4825 for ( ; argument != NULL; argument = argument->next) {
4826 const char *constraints = argument->constraints.begin;
4827 asm_constraint_flags_t asm_flags
4828 = be_parse_asm_constraints(constraints);
4830 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4831 errorf(&statement->base.pos,
4832 "some constraints in '%s' are not supported", constraints);
4835 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4836 errorf(&statement->base.pos,
4837 "some constraints in '%s' are invalid", constraints);
4840 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4841 errorf(&statement->base.pos,
4842 "write flag specified for input constraints '%s'",
4848 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4849 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4850 /* we can treat this as "normal" input */
4851 input = expression_to_firm(argument->expression);
4852 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4853 /* pure memory ops need no input (but we have to make sure we
4854 * attach to the memory) */
4855 assert(! (asm_flags &
4856 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4857 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4858 needs_memory = true;
4859 input = expression_to_addr(argument->expression);
4861 errorf(&statement->base.pos,
4862 "only modifiers but no place set in constraints '%s'",
4867 ir_asm_constraint constraint;
4868 constraint.pos = next_pos++;
4869 constraint.constraint = new_id_from_str(constraints);
4870 constraint.mode = get_irn_mode(input);
4872 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4873 ins[in_size++] = input;
4876 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4877 assert(obstack_object_size(&asm_obst)
4878 == in_size * sizeof(ir_asm_constraint));
4879 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4881 /* create asm node */
4882 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4884 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4886 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4887 out_size, output_constraints,
4888 n_clobbers, clobbers, asm_text);
4890 if (statement->is_volatile) {
4891 set_irn_pinned(node, op_pin_state_pinned);
4893 set_irn_pinned(node, op_pin_state_floats);
4896 /* create output projs & connect them */
4898 ir_node *projm = new_Proj(node, mode_M, out_size);
4903 for (i = 0; i < out_size; ++i) {
4904 const expression_t *out_expr = out_exprs[i];
4906 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
4907 ir_node *proj = new_Proj(node, mode, pn);
4908 ir_node *addr = out_addrs[i];
4910 set_value_for_expression_addr(out_expr, proj, addr);
4916 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4918 statement_to_firm(statement->try_statement);
4919 position_t const *const pos = &statement->base.pos;
4920 warningf(WARN_OTHER, pos, "structured exception handling ignored");
4924 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4926 errorf(&statement->base.pos, "__leave not supported yet");
4931 * Transform a statement.
4933 static ir_node *statement_to_firm(statement_t *const stmt)
4936 assert(!stmt->base.transformed);
4937 stmt->base.transformed = true;
4940 switch (stmt->kind) {
4941 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
4942 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
4943 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
4944 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
4945 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
4946 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
4947 case STATEMENT_EMPTY: return NULL; /* nothing */
4948 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
4949 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
4950 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
4951 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
4952 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
4953 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
4954 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
4955 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
4956 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
4960 case STATEMENT_BREAK: tgt = &break_target; goto jump;
4961 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
4963 jump_to_target(tgt);
4964 set_unreachable_now();
4968 case STATEMENT_ERROR: panic("error statement");
4970 panic("statement not implemented");
4973 static int count_local_variables(const entity_t *entity,
4974 const entity_t *const last)
4977 entity_t const *const end = last != NULL ? last->base.next : NULL;
4978 for (; entity != end; entity = entity->base.next) {
4979 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
4980 !var_needs_entity(&entity->variable))
4986 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
4988 int *const count = env;
4990 switch (stmt->kind) {
4991 case STATEMENT_DECLARATION: {
4992 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4993 *count += count_local_variables(decl_stmt->declarations_begin,
4994 decl_stmt->declarations_end);
4999 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5008 * Return the number of local (alias free) variables used by a function.
5010 static int get_function_n_local_vars(entity_t *entity)
5012 const function_t *function = &entity->function;
5015 /* count parameters */
5016 count += count_local_variables(function->parameters.entities, NULL);
5018 /* count local variables declared in body */
5019 walk_statements(function->body, count_local_variables_in_stmt, &count);
5024 * Build Firm code for the parameters of a function.
5026 static void initialize_function_parameters(entity_t *entity)
5028 assert(entity->kind == ENTITY_FUNCTION);
5029 ir_graph *irg = current_ir_graph;
5030 ir_node *args = get_irg_args(irg);
5032 ir_type *function_irtype;
5034 if (entity->function.need_closure) {
5035 /* add an extra parameter for the static link */
5036 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5039 /* Matze: IMO this is wrong, nested functions should have an own
5040 * type and not rely on strange parameters... */
5041 function_irtype = create_method_type(&entity->declaration.type->function, true);
5043 function_irtype = get_ir_type(entity->declaration.type);
5048 entity_t *parameter = entity->function.parameters.entities;
5049 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5050 if (parameter->kind != ENTITY_PARAMETER)
5053 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5054 type_t *type = skip_typeref(parameter->declaration.type);
5056 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5057 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5058 if (var_needs_entity(¶meter->variable)) {
5059 ir_type *frame_type = get_irg_frame_type(irg);
5061 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5062 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5063 parameter->variable.v.entity = param;
5067 ir_mode *param_mode = get_type_mode(param_irtype);
5069 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5070 value = conv_to_storage_type(dbgi, value, type);
5072 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5073 parameter->variable.v.value_number = next_value_number_function;
5074 set_irg_loc_description(current_ir_graph, next_value_number_function,
5076 ++next_value_number_function;
5078 set_value(parameter->variable.v.value_number, value);
5082 static void add_function_pointer(ir_type *segment, ir_entity *method,
5083 const char *unique_template)
5085 ir_type *method_type = get_entity_type(method);
5086 ir_type *ptr_type = new_type_pointer(method_type);
5088 /* these entities don't really have a name but firm only allows
5090 * Note that we mustn't give these entities a name since for example
5091 * Mach-O doesn't allow them. */
5092 ident *ide = id_unique(unique_template);
5093 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5094 ir_graph *irg = get_const_code_irg();
5095 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5098 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5099 set_entity_compiler_generated(ptr, 1);
5100 set_entity_visibility(ptr, ir_visibility_private);
5101 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5102 set_atomic_ent_value(ptr, val);
5106 * Create code for a function and all inner functions.
5108 * @param entity the function entity
5110 static void create_function(entity_t *entity)
5112 assert(entity->kind == ENTITY_FUNCTION);
5113 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5115 if (entity->function.body == NULL)
5118 inner_functions = NULL;
5119 current_trampolines = NULL;
5121 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5122 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5123 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5125 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5126 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5127 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5130 current_function_entity = entity;
5131 current_function_name = NULL;
5132 current_funcsig = NULL;
5135 assert(!ijmp_blocks);
5136 init_jump_target(&ijmp_target, NULL);
5137 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5138 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5140 int n_local_vars = get_function_n_local_vars(entity);
5141 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5142 current_ir_graph = irg;
5144 ir_graph *old_current_function = current_function;
5145 current_function = irg;
5147 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5148 current_vararg_entity = NULL;
5150 set_irg_fp_model(irg, firm_fp_model);
5151 set_irn_dbg_info(get_irg_start_block(irg),
5152 get_entity_dbg_info(function_entity));
5154 next_value_number_function = 0;
5155 initialize_function_parameters(entity);
5156 current_static_link = entity->function.static_link;
5158 statement_to_firm(entity->function.body);
5160 ir_node *end_block = get_irg_end_block(irg);
5162 /* do we have a return statement yet? */
5163 if (currently_reachable()) {
5164 type_t *type = skip_typeref(entity->declaration.type);
5165 assert(is_type_function(type));
5166 type_t *const return_type = skip_typeref(type->function.return_type);
5169 if (is_type_void(return_type)) {
5170 ret = new_Return(get_store(), 0, NULL);
5172 ir_mode *const mode = get_ir_mode_storage(return_type);
5175 /* ยง5.1.2.2.3 main implicitly returns 0 */
5176 if (is_main(entity)) {
5177 in[0] = new_Const(get_mode_null(mode));
5179 in[0] = new_Unknown(mode);
5181 ret = new_Return(get_store(), 1, in);
5183 add_immBlock_pred(end_block, ret);
5186 if (enter_jump_target(&ijmp_target)) {
5188 size_t const n = ARR_LEN(ijmp_ops);
5189 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5190 ir_node *const ijmp = new_IJmp(op);
5191 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5192 ir_node *const block = ijmp_blocks[i];
5193 add_immBlock_pred(block, ijmp);
5194 mature_immBlock(block);
5198 DEL_ARR_F(ijmp_ops);
5199 DEL_ARR_F(ijmp_blocks);
5203 irg_finalize_cons(irg);
5205 /* finalize the frame type */
5206 ir_type *frame_type = get_irg_frame_type(irg);
5207 int n = get_compound_n_members(frame_type);
5210 for (int i = 0; i < n; ++i) {
5211 ir_entity *member = get_compound_member(frame_type, i);
5212 ir_type *entity_type = get_entity_type(member);
5214 int align = get_type_alignment_bytes(entity_type);
5215 if (align > align_all)
5219 misalign = offset % align;
5221 offset += align - misalign;
5225 set_entity_offset(member, offset);
5226 offset += get_type_size_bytes(entity_type);
5228 set_type_size_bytes(frame_type, offset);
5229 set_type_alignment_bytes(frame_type, align_all);
5231 irg_verify(irg, VERIFY_ENFORCE_SSA);
5232 current_vararg_entity = old_current_vararg_entity;
5233 current_function = old_current_function;
5235 if (current_trampolines != NULL) {
5236 DEL_ARR_F(current_trampolines);
5237 current_trampolines = NULL;
5240 /* create inner functions if any */
5241 entity_t **inner = inner_functions;
5242 if (inner != NULL) {
5243 ir_type *rem_outer_frame = current_outer_frame;
5244 current_outer_frame = get_irg_frame_type(current_ir_graph);
5245 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5246 create_function(inner[i]);
5250 current_outer_frame = rem_outer_frame;
5254 static void scope_to_firm(scope_t *scope)
5256 /* first pass: create declarations */
5257 entity_t *entity = scope->entities;
5258 for ( ; entity != NULL; entity = entity->base.next) {
5259 if (entity->base.symbol == NULL)
5262 if (entity->kind == ENTITY_FUNCTION) {
5263 if (entity->function.btk != BUILTIN_NONE) {
5264 /* builtins have no representation */
5267 (void)get_function_entity(entity, NULL);
5268 } else if (entity->kind == ENTITY_VARIABLE) {
5269 create_global_variable(entity);
5270 } else if (entity->kind == ENTITY_NAMESPACE) {
5271 scope_to_firm(&entity->namespacee.members);
5275 /* second pass: create code/initializers */
5276 entity = scope->entities;
5277 for ( ; entity != NULL; entity = entity->base.next) {
5278 if (entity->base.symbol == NULL)
5281 if (entity->kind == ENTITY_FUNCTION) {
5282 if (entity->function.btk != BUILTIN_NONE) {
5283 /* builtins have no representation */
5286 create_function(entity);
5287 } else if (entity->kind == ENTITY_VARIABLE) {
5288 assert(entity->declaration.kind
5289 == DECLARATION_KIND_GLOBAL_VARIABLE);
5290 current_ir_graph = get_const_code_irg();
5291 create_variable_initializer(entity);
5296 void init_ast2firm(void)
5298 obstack_init(&asm_obst);
5299 init_atomic_modes();
5301 ir_set_debug_retrieve(dbg_retrieve);
5302 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5304 /* create idents for all known runtime functions */
5305 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5306 rts_idents[i] = new_id_from_str(rts_data[i].name);
5309 entitymap_init(&entitymap);
5312 static void init_ir_types(void)
5314 static int ir_types_initialized = 0;
5315 if (ir_types_initialized)
5317 ir_types_initialized = 1;
5319 ir_type_char = get_ir_type(type_char);
5321 be_params = be_get_backend_param();
5322 mode_float_arithmetic = be_params->mode_float_arithmetic;
5324 stack_param_align = be_params->stack_param_align;
5327 void exit_ast2firm(void)
5329 entitymap_destroy(&entitymap);
5330 obstack_free(&asm_obst, NULL);
5333 static void global_asm_to_firm(statement_t *s)
5335 for (; s != NULL; s = s->base.next) {
5336 assert(s->kind == STATEMENT_ASM);
5338 char const *const text = s->asms.asm_text.begin;
5339 size_t const size = s->asms.asm_text.size;
5340 ident *const id = new_id_from_chars(text, size);
5345 static const char *get_cwd(void)
5347 static char buf[1024];
5348 if (buf[0] == '\0') {
5349 return getcwd(buf, sizeof(buf));
5354 void translation_unit_to_firm(translation_unit_t *unit)
5356 if (c_mode & _CXX) {
5357 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5358 } else if (c_mode & _C99) {
5359 be_dwarf_set_source_language(DW_LANG_C99);
5360 } else if (c_mode & _C89) {
5361 be_dwarf_set_source_language(DW_LANG_C89);
5363 be_dwarf_set_source_language(DW_LANG_C);
5365 const char *cwd = get_cwd();
5367 be_dwarf_set_compilation_directory(cwd);
5370 /* initialize firm arithmetic */
5371 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5372 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5374 /* just to be sure */
5375 init_jump_target(&break_target, NULL);
5376 init_jump_target(&continue_target, NULL);
5377 current_switch = NULL;
5378 current_translation_unit = unit;
5382 scope_to_firm(&unit->scope);
5383 global_asm_to_firm(unit->global_asm);
5385 current_ir_graph = NULL;
5386 current_translation_unit = NULL;