2 * This file is part of cparser.
3 * Copyright (C) 2012 Matthias Braun <matze@braunis.de>
13 #include <libfirm/firm.h>
14 #include <libfirm/adt/obst.h>
15 #include <libfirm/be.h>
19 #include "adt/error.h"
20 #include "adt/array.h"
21 #include "adt/strutil.h"
23 #include "jump_target.h"
30 #include "diagnostic.h"
31 #include "lang_features.h"
33 #include "type_hash.h"
38 #include "entitymap_t.h"
39 #include "driver/firm_opt.h"
41 typedef struct trampoline_region trampoline_region;
42 struct trampoline_region {
43 ir_entity *function; /**< The function that is called by this trampoline */
44 ir_entity *region; /**< created region for the trampoline */
47 typedef struct complex_value {
52 typedef struct complex_constant {
57 fp_model_t firm_fp_model = fp_model_precise;
59 static const backend_params *be_params;
61 static ir_type *ir_type_char;
63 /* architecture specific floating point arithmetic mode (if any) */
64 static ir_mode *mode_float_arithmetic;
66 /* alignment of stack parameters */
67 static unsigned stack_param_align;
69 static int next_value_number_function;
70 static jump_target continue_target;
71 static jump_target break_target;
72 static ir_node *current_switch;
73 static bool saw_default_label;
74 static entity_t **inner_functions;
75 static jump_target ijmp_target;
76 static ir_node **ijmp_ops;
77 static ir_node **ijmp_blocks;
78 static bool constant_folding;
80 #define PUSH_BREAK(val) \
81 jump_target const old_break_target = break_target; \
82 (init_jump_target(&break_target, (val)))
84 ((void)(break_target = old_break_target))
86 #define PUSH_CONTINUE(val) \
87 jump_target const old_continue_target = continue_target; \
88 (init_jump_target(&continue_target, (val)))
89 #define POP_CONTINUE() \
90 ((void)(continue_target = old_continue_target))
92 #define PUSH_IRG(val) \
93 ir_graph *const old_irg = current_ir_graph; \
94 ir_graph *const new_irg = (val); \
95 ((void)(current_ir_graph = new_irg))
98 (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
100 static const entity_t *current_function_entity;
101 static ir_node *current_function_name;
102 static ir_node *current_funcsig;
103 static ir_graph *current_function;
104 static translation_unit_t *current_translation_unit;
105 static trampoline_region *current_trampolines;
106 static ir_type *current_outer_frame;
107 static ir_node *current_static_link;
108 static ir_entity *current_vararg_entity;
110 static entitymap_t entitymap;
112 static struct obstack asm_obst;
114 typedef enum declaration_kind_t {
115 DECLARATION_KIND_UNKNOWN,
116 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
117 DECLARATION_KIND_GLOBAL_VARIABLE,
118 DECLARATION_KIND_LOCAL_VARIABLE,
119 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
120 DECLARATION_KIND_PARAMETER,
121 DECLARATION_KIND_PARAMETER_ENTITY,
122 DECLARATION_KIND_FUNCTION,
123 DECLARATION_KIND_COMPOUND_MEMBER,
124 DECLARATION_KIND_INNER_FUNCTION
125 } declaration_kind_t;
127 static ir_type *get_ir_type_incomplete(type_t *type);
129 static void enqueue_inner_function(entity_t *entity)
131 if (inner_functions == NULL)
132 inner_functions = NEW_ARR_F(entity_t *, 0);
133 ARR_APP1(entity_t*, inner_functions, entity);
136 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
138 const entity_t *entity = get_irg_loc_description(irg, pos);
140 if (entity != NULL) {
141 position_t const *const pos = &entity->base.pos;
142 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
144 return new_r_Unknown(irg, mode);
147 static src_loc_t dbg_retrieve(const dbg_info *dbg)
149 position_t const *const pos = (position_t const*)dbg;
151 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
153 return (src_loc_t){ NULL, 0, 0 };
157 static dbg_info *get_dbg_info(const position_t *pos)
159 return (dbg_info*) pos;
162 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
163 const type_dbg_info *dbg)
166 print_to_buffer(buffer, buffer_size);
167 const type_t *type = (const type_t*) dbg;
169 finish_print_to_buffer();
172 static type_dbg_info *get_type_dbg_info_(const type_t *type)
174 return (type_dbg_info*) type;
177 /* is the current block a reachable one? */
178 static bool currently_reachable(void)
180 ir_node *const block = get_cur_block();
181 return block != NULL && !is_Bad(block);
184 static void set_unreachable_now(void)
189 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
191 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
192 static ir_node *expression_to_value(expression_t const *expr);
193 static complex_value expression_to_complex(const expression_t *expression);
195 static unsigned decide_modulo_shift(unsigned type_size)
197 if (architecture_modulo_shift == 0)
199 if (type_size < architecture_modulo_shift)
200 return architecture_modulo_shift;
204 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
206 unsigned flags = get_atomic_type_flags(kind);
207 unsigned size = get_atomic_type_size(kind);
208 if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
210 case 4: return get_modeF();
211 case 8: return get_modeD();
212 default: panic("unexpected kind");
214 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
216 unsigned bit_size = size * 8;
217 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
218 unsigned modulo_shift = decide_modulo_shift(bit_size);
220 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
221 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
229 * Initialises the atomic modes depending on the machine size.
231 static void init_atomic_modes(void)
233 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
234 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
235 if (atomic_modes[i] != NULL)
237 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
241 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
243 assert(kind <= ATOMIC_TYPE_LAST);
244 return atomic_modes[kind];
247 static ir_node *get_vla_size(array_type_t *const type)
249 ir_node *size_node = type->size_node;
250 if (size_node == NULL) {
251 size_node = expression_to_value(type->size_expression);
252 type->size_node = size_node;
257 static unsigned count_parameters(const function_type_t *function_type)
261 function_parameter_t *parameter = function_type->parameters;
262 for ( ; parameter != NULL; parameter = parameter->next) {
269 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
272 ir_mode *mode = atomic_modes[akind];
273 ir_type *irtype = new_d_type_primitive(mode, dbgi);
274 unsigned alignment = get_atomic_type_alignment(akind);
275 unsigned size = get_atomic_type_size(akind);
277 set_type_size_bytes(irtype, size);
278 set_type_alignment_bytes(irtype, alignment);
284 * Creates a Firm type for an atomic type
286 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
288 type_dbg_info *dbgi = get_type_dbg_info_(type);
289 return create_primitive_irtype(akind, dbgi);
293 * Creates a Firm type for a complex type
295 static ir_type *create_complex_type(atomic_type_kind_t akind,
298 type_dbg_info *dbgi = get_type_dbg_info_(type);
299 ir_type *etype = create_primitive_irtype(akind, NULL);
300 ir_type *irtype = new_d_type_array(1, etype, dbgi);
302 int align = get_type_alignment_bytes(etype);
303 set_type_alignment_bytes(irtype, align);
304 unsigned n_elements = 2;
305 set_array_bounds_int(irtype, 0, 0, n_elements);
306 size_t elemsize = get_type_size_bytes(etype);
307 if (elemsize % align > 0) {
308 elemsize += align - (elemsize % align);
310 set_type_size_bytes(irtype, n_elements * elemsize);
311 set_type_state(irtype, layout_fixed);
317 * Creates a Firm type for an imaginary type
319 static ir_type *create_imaginary_type(const atomic_type_t *type)
321 return create_atomic_type(type->akind, (const type_t*)type);
325 * return type of a parameter (and take transparent union gnu extension into
328 static type_t *get_parameter_type(type_t *orig_type)
330 type_t *type = skip_typeref(orig_type);
331 if (is_type_union(type)
332 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
333 compound_t *compound = type->compound.compound;
334 type = compound->members.entities->declaration.type;
340 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
342 type_t *return_type = skip_typeref(function_type->return_type);
344 int n_parameters = count_parameters(function_type)
345 + (for_closure ? 1 : 0);
346 int n_results = is_type_void(return_type) ? 0 : 1;
347 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
348 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
350 if (!is_type_void(return_type)) {
351 ir_type *restype = get_ir_type(return_type);
352 set_method_res_type(irtype, 0, restype);
355 function_parameter_t *parameter = function_type->parameters;
358 ir_type *p_irtype = get_ir_type(type_void_ptr);
359 set_method_param_type(irtype, n, p_irtype);
362 for ( ; parameter != NULL; parameter = parameter->next) {
363 type_t *type = get_parameter_type(parameter->type);
364 ir_type *p_irtype = get_ir_type(type);
365 set_method_param_type(irtype, n, p_irtype);
369 bool is_variadic = function_type->variadic;
372 set_method_variadicity(irtype, variadicity_variadic);
374 unsigned cc = get_method_calling_convention(irtype);
375 switch (function_type->calling_convention) {
376 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
379 set_method_calling_convention(irtype, SET_CDECL(cc));
386 /* only non-variadic function can use stdcall, else use cdecl */
387 set_method_calling_convention(irtype, SET_STDCALL(cc));
393 /* only non-variadic function can use fastcall, else use cdecl */
394 set_method_calling_convention(irtype, SET_FASTCALL(cc));
398 /* Hmm, leave default, not accepted by the parser yet. */
403 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
405 const decl_modifiers_t modifiers = function_type->modifiers;
406 if (modifiers & DM_CONST)
407 add_method_additional_properties(irtype, mtp_property_const);
408 if (modifiers & DM_PURE)
409 add_method_additional_properties(irtype, mtp_property_pure);
410 if (modifiers & DM_RETURNS_TWICE)
411 add_method_additional_properties(irtype, mtp_property_returns_twice);
412 if (modifiers & DM_NORETURN)
413 add_method_additional_properties(irtype, mtp_property_noreturn);
414 if (modifiers & DM_NOTHROW)
415 add_method_additional_properties(irtype, mtp_property_nothrow);
416 if (modifiers & DM_MALLOC)
417 add_method_additional_properties(irtype, mtp_property_malloc);
422 static ir_type *create_pointer_type(pointer_type_t *type)
424 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
425 type_t *points_to = type->points_to;
426 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
427 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
432 static ir_type *create_reference_type(reference_type_t *type)
434 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
435 type_t *refers_to = type->refers_to;
436 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
437 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
442 static ir_type *create_array_type(array_type_t *type)
444 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
445 type_t *element_type = type->element_type;
446 ir_type *ir_element_type = get_ir_type(element_type);
447 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
449 const int align = get_type_alignment_bytes(ir_element_type);
450 set_type_alignment_bytes(irtype, align);
452 if (type->size_constant) {
453 int n_elements = type->size;
455 set_array_bounds_int(irtype, 0, 0, n_elements);
457 size_t elemsize = get_type_size_bytes(ir_element_type);
458 if (elemsize % align > 0) {
459 elemsize += align - (elemsize % align);
461 set_type_size_bytes(irtype, n_elements * elemsize);
463 set_array_lower_bound_int(irtype, 0, 0);
465 set_type_state(irtype, layout_fixed);
471 * Return the signed integer type of size bits.
473 * @param size the size
475 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
479 static ir_mode *s_modes[64 + 1] = {NULL, };
483 if (size <= 0 || size > 64)
486 mode = s_modes[size];
490 snprintf(name, sizeof(name), "bf_I%u", size);
491 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
492 s_modes[size] = mode;
495 type_dbg_info *dbgi = get_type_dbg_info_(type);
496 res = new_d_type_primitive(mode, dbgi);
497 set_primitive_base_type(res, base_tp);
503 * Return the unsigned integer type of size bits.
505 * @param size the size
507 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
511 static ir_mode *u_modes[64 + 1] = {NULL, };
515 if (size <= 0 || size > 64)
518 mode = u_modes[size];
522 snprintf(name, sizeof(name), "bf_U%u", size);
523 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
524 u_modes[size] = mode;
527 type_dbg_info *dbgi = get_type_dbg_info_(type);
528 res = new_d_type_primitive(mode, dbgi);
529 set_primitive_base_type(res, base_tp);
534 static ir_type *create_bitfield_type(const entity_t *entity)
536 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
537 type_t *base = skip_typeref(entity->declaration.type);
538 assert(is_type_integer(base));
539 ir_type *irbase = get_ir_type(base);
541 unsigned bit_size = entity->compound_member.bit_size;
543 if (is_type_signed(base)) {
544 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
546 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
551 * Construct firm type from ast struct type.
553 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
555 compound_t *compound = type->compound;
557 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
558 return compound->irtype;
561 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
563 symbol_t *type_symbol = compound->base.symbol;
565 if (type_symbol != NULL) {
566 id = new_id_from_str(type_symbol->string);
569 id = id_unique("__anonymous_union.%u");
571 id = id_unique("__anonymous_struct.%u");
577 irtype = new_type_union(id);
579 irtype = new_type_struct(id);
582 compound->irtype_complete = false;
583 compound->irtype = irtype;
589 layout_union_type(type);
591 layout_struct_type(type);
594 compound->irtype_complete = true;
596 entity_t *entry = compound->members.entities;
597 for ( ; entry != NULL; entry = entry->base.next) {
598 if (entry->kind != ENTITY_COMPOUND_MEMBER)
601 symbol_t *symbol = entry->base.symbol;
602 type_t *entry_type = entry->declaration.type;
604 if (symbol == NULL) {
605 /* anonymous bitfield member, skip */
606 if (entry->compound_member.bitfield)
608 assert(is_type_compound(entry_type));
609 ident = id_unique("anon.%u");
611 ident = new_id_from_str(symbol->string);
614 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
616 ir_type *entry_irtype;
617 if (entry->compound_member.bitfield) {
618 entry_irtype = create_bitfield_type(entry);
620 entry_irtype = get_ir_type(entry_type);
622 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
624 set_entity_offset(entity, entry->compound_member.offset);
625 set_entity_offset_bits_remainder(entity,
626 entry->compound_member.bit_offset);
628 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
629 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
630 entry->compound_member.entity = entity;
633 set_type_alignment_bytes(irtype, compound->alignment);
634 set_type_size_bytes(irtype, compound->size);
635 set_type_state(irtype, layout_fixed);
640 void determine_enum_values(enum_type_t *const type)
642 ir_mode *const mode = atomic_modes[type->base.akind];
643 ir_tarval *const one = get_mode_one(mode);
644 ir_tarval * tv_next = get_mode_null(mode);
646 enum_t *enume = type->enume;
647 entity_t *entry = enume->base.next;
648 for (; entry != NULL; entry = entry->base.next) {
649 if (entry->kind != ENTITY_ENUM_VALUE)
652 expression_t *const init = entry->enum_value.value;
654 tv_next = fold_constant_to_tarval(init);
656 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
657 entry->enum_value.tv = tv_next;
658 tv_next = tarval_add(tv_next, one);
662 static ir_type *create_enum_type(enum_type_t *const type)
664 return create_atomic_type(type->base.akind, (const type_t*) type);
667 static ir_type *get_ir_type_incomplete(type_t *type)
669 type = skip_typeref(type);
671 if (type->base.firm_type != NULL) {
672 return type->base.firm_type;
675 if (is_type_compound(type)) {
676 return create_compound_type(&type->compound, true);
678 return get_ir_type(type);
682 ir_type *get_ir_type(type_t *type)
684 type = skip_typeref(type);
686 if (type->base.firm_type != NULL) {
687 return type->base.firm_type;
690 ir_type *firm_type = NULL;
691 switch (type->kind) {
693 firm_type = create_atomic_type(type->atomic.akind, type);
696 firm_type = create_complex_type(type->atomic.akind, type);
699 firm_type = create_imaginary_type(&type->atomic);
702 firm_type = create_method_type(&type->function, false);
705 firm_type = create_pointer_type(&type->pointer);
708 firm_type = create_reference_type(&type->reference);
711 firm_type = create_array_type(&type->array);
713 case TYPE_COMPOUND_STRUCT:
714 case TYPE_COMPOUND_UNION:
715 firm_type = create_compound_type(&type->compound, false);
718 firm_type = create_enum_type(&type->enumt);
726 if (firm_type == NULL)
727 panic("unknown type found");
729 type->base.firm_type = firm_type;
733 static ir_mode *get_ir_mode_storage(type_t *type)
735 type = skip_typeref(type);
737 /* Firm doesn't report a mode for arrays and structs/unions. */
738 if (!is_type_scalar(type) || is_type_complex(type)) {
742 ir_type *const irtype = get_ir_type(type);
743 ir_mode *const mode = get_type_mode(irtype);
744 assert(mode != NULL);
748 static ir_mode *get_complex_mode_storage(type_t *type)
750 assert(is_type_complex(skip_typeref(type)));
751 ir_type *const irtype = get_ir_type(type);
752 ir_type *const etype = get_array_element_type(irtype);
753 ir_mode *const mode = get_type_mode(etype);
758 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
759 * int that it returns bigger modes for floating point on some platforms
760 * (x87 internally does arithemtic with 80bits)
762 static ir_mode *get_ir_mode_arithmetic(type_t *type)
764 ir_mode *mode = get_ir_mode_storage(type);
765 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
766 return mode_float_arithmetic;
772 static ir_mode *get_complex_mode_arithmetic(type_t *type)
774 ir_mode *mode = get_complex_mode_storage(type);
775 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
776 return mode_float_arithmetic;
783 * Return a node representing the size of a type.
785 static ir_node *get_type_size_node(type_t *type)
787 ir_mode *const mode = get_ir_mode_storage(type_size_t);
788 type = skip_typeref(type);
790 if (is_type_array(type) && type->array.is_vla) {
791 ir_node *size_node = get_vla_size(&type->array);
792 ir_node *elem_size = get_type_size_node(type->array.element_type);
793 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
797 unsigned const size = get_type_size(type);
798 return new_Const_long(mode, size);
801 /** Names of the runtime functions. */
802 static const struct {
803 int id; /**< the rts id */
804 int n_res; /**< number of return values */
805 const char *name; /**< the name of the rts function */
806 int n_params; /**< number of parameters */
807 unsigned flags; /**< language flags */
809 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
810 { rts_abort, 0, "abort", 0, _C89 },
811 { rts_alloca, 1, "alloca", 1, _ALL },
812 { rts_abs, 1, "abs", 1, _C89 },
813 { rts_labs, 1, "labs", 1, _C89 },
814 { rts_llabs, 1, "llabs", 1, _C99 },
815 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
817 { rts_fabs, 1, "fabs", 1, _C89 },
818 { rts_sqrt, 1, "sqrt", 1, _C89 },
819 { rts_cbrt, 1, "cbrt", 1, _C99 },
820 { rts_exp, 1, "exp", 1, _C89 },
821 { rts_exp2, 1, "exp2", 1, _C89 },
822 { rts_exp10, 1, "exp10", 1, _GNUC },
823 { rts_log, 1, "log", 1, _C89 },
824 { rts_log2, 1, "log2", 1, _C89 },
825 { rts_log10, 1, "log10", 1, _C89 },
826 { rts_pow, 1, "pow", 2, _C89 },
827 { rts_sin, 1, "sin", 1, _C89 },
828 { rts_cos, 1, "cos", 1, _C89 },
829 { rts_tan, 1, "tan", 1, _C89 },
830 { rts_asin, 1, "asin", 1, _C89 },
831 { rts_acos, 1, "acos", 1, _C89 },
832 { rts_atan, 1, "atan", 1, _C89 },
833 { rts_sinh, 1, "sinh", 1, _C89 },
834 { rts_cosh, 1, "cosh", 1, _C89 },
835 { rts_tanh, 1, "tanh", 1, _C89 },
837 { rts_fabsf, 1, "fabsf", 1, _C99 },
838 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
839 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
840 { rts_expf, 1, "expf", 1, _C99 },
841 { rts_exp2f, 1, "exp2f", 1, _C99 },
842 { rts_exp10f, 1, "exp10f", 1, _GNUC },
843 { rts_logf, 1, "logf", 1, _C99 },
844 { rts_log2f, 1, "log2f", 1, _C99 },
845 { rts_log10f, 1, "log10f", 1, _C99 },
846 { rts_powf, 1, "powf", 2, _C99 },
847 { rts_sinf, 1, "sinf", 1, _C99 },
848 { rts_cosf, 1, "cosf", 1, _C99 },
849 { rts_tanf, 1, "tanf", 1, _C99 },
850 { rts_asinf, 1, "asinf", 1, _C99 },
851 { rts_acosf, 1, "acosf", 1, _C99 },
852 { rts_atanf, 1, "atanf", 1, _C99 },
853 { rts_sinhf, 1, "sinhf", 1, _C99 },
854 { rts_coshf, 1, "coshf", 1, _C99 },
855 { rts_tanhf, 1, "tanhf", 1, _C99 },
857 { rts_fabsl, 1, "fabsl", 1, _C99 },
858 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
859 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
860 { rts_expl, 1, "expl", 1, _C99 },
861 { rts_exp2l, 1, "exp2l", 1, _C99 },
862 { rts_exp10l, 1, "exp10l", 1, _GNUC },
863 { rts_logl, 1, "logl", 1, _C99 },
864 { rts_log2l, 1, "log2l", 1, _C99 },
865 { rts_log10l, 1, "log10l", 1, _C99 },
866 { rts_powl, 1, "powl", 2, _C99 },
867 { rts_sinl, 1, "sinl", 1, _C99 },
868 { rts_cosl, 1, "cosl", 1, _C99 },
869 { rts_tanl, 1, "tanl", 1, _C99 },
870 { rts_asinl, 1, "asinl", 1, _C99 },
871 { rts_acosl, 1, "acosl", 1, _C99 },
872 { rts_atanl, 1, "atanl", 1, _C99 },
873 { rts_sinhl, 1, "sinhl", 1, _C99 },
874 { rts_coshl, 1, "coshl", 1, _C99 },
875 { rts_tanhl, 1, "tanhl", 1, _C99 },
877 { rts_strcmp, 1, "strcmp", 2, _C89 },
878 { rts_strncmp, 1, "strncmp", 3, _C89 },
879 { rts_strcpy, 1, "strcpy", 2, _C89 },
880 { rts_strlen, 1, "strlen", 1, _C89 },
881 { rts_memcpy, 1, "memcpy", 3, _C89 },
882 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
883 { rts_memmove, 1, "memmove", 3, _C89 },
884 { rts_memset, 1, "memset", 3, _C89 },
885 { rts_memcmp, 1, "memcmp", 3, _C89 },
888 static ident *rts_idents[lengthof(rts_data)];
890 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
892 void set_create_ld_ident(ident *(*func)(entity_t*))
894 create_ld_ident = func;
897 static bool declaration_is_definition(const entity_t *entity)
899 switch (entity->kind) {
900 case ENTITY_VARIABLE:
901 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
902 case ENTITY_FUNCTION:
903 return entity->function.body != NULL;
904 case ENTITY_PARAMETER:
905 case ENTITY_COMPOUND_MEMBER:
909 case ENTITY_ENUM_VALUE:
910 case ENTITY_NAMESPACE:
912 case ENTITY_LOCAL_LABEL:
915 panic("entity is not a declaration");
919 * Handle GNU attributes for entities
921 * @param ent the entity
922 * @param decl the routine declaration
924 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
926 assert(is_declaration(entity));
927 decl_modifiers_t modifiers = entity->declaration.modifiers;
929 if (is_method_entity(irentity)) {
930 if (modifiers & DM_PURE)
931 add_entity_additional_properties(irentity, mtp_property_pure);
932 if (modifiers & DM_CONST)
933 add_entity_additional_properties(irentity, mtp_property_const);
934 if (modifiers & DM_NOINLINE)
935 add_entity_additional_properties(irentity, mtp_property_noinline);
936 if (modifiers & DM_FORCEINLINE)
937 add_entity_additional_properties(irentity, mtp_property_always_inline);
938 if (modifiers & DM_NAKED)
939 add_entity_additional_properties(irentity, mtp_property_naked);
940 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
941 add_entity_additional_properties(irentity,
942 mtp_property_inline_recommended);
944 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
945 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
947 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
948 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
949 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
953 static bool is_main(entity_t *entity)
955 static symbol_t *sym_main = NULL;
956 if (sym_main == NULL) {
957 sym_main = symbol_table_insert("main");
960 if (entity->base.symbol != sym_main)
962 /* must be in outermost scope */
963 if (entity->base.parent_scope != ¤t_translation_unit->scope)
970 * Creates an entity representing a function.
972 * @param entity the function declaration/definition
973 * @param owner_type the owner type of this function, NULL
974 * for global functions
976 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
978 assert(entity->kind == ENTITY_FUNCTION);
979 if (entity->function.irentity != NULL)
980 return entity->function.irentity;
982 switch (entity->function.btk) {
985 case BUILTIN_LIBC_CHECK:
991 symbol_t *symbol = entity->base.symbol;
992 ident *id = new_id_from_str(symbol->string);
994 /* already an entity defined? */
995 ir_entity *irentity = entitymap_get(&entitymap, symbol);
996 bool const has_body = entity->function.body != NULL;
997 if (irentity != NULL) {
1001 ir_type *ir_type_method;
1002 if (entity->function.need_closure)
1003 ir_type_method = create_method_type(&entity->declaration.type->function, true);
1005 ir_type_method = get_ir_type(entity->declaration.type);
1007 bool nested_function = false;
1008 if (owner_type == NULL)
1009 owner_type = get_glob_type();
1011 nested_function = true;
1013 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
1014 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1017 if (nested_function)
1018 ld_id = id_unique("inner.%u");
1020 ld_id = create_ld_ident(entity);
1021 set_entity_ld_ident(irentity, ld_id);
1023 handle_decl_modifiers(irentity, entity);
1025 if (! nested_function) {
1026 storage_class_tag_t const storage_class
1027 = (storage_class_tag_t) entity->declaration.storage_class;
1028 if (storage_class == STORAGE_CLASS_STATIC) {
1029 set_entity_visibility(irentity, ir_visibility_local);
1031 set_entity_visibility(irentity, ir_visibility_external);
1034 bool const is_inline = entity->function.is_inline;
1035 if (is_inline && has_body) {
1036 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1037 || ((c_mode & _C99) == 0
1038 && storage_class == STORAGE_CLASS_EXTERN)) {
1039 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1043 /* nested functions are always local */
1044 set_entity_visibility(irentity, ir_visibility_local);
1047 /* We should check for file scope here, but as long as we compile C only
1048 this is not needed. */
1049 if (!freestanding && !has_body) {
1050 /* check for a known runtime function */
1051 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1052 if (id != rts_idents[i])
1055 function_type_t *function_type
1056 = &entity->declaration.type->function;
1057 /* rts_entities code can't handle a "wrong" number of parameters */
1058 if (function_type->unspecified_parameters)
1061 /* check number of parameters */
1062 int n_params = count_parameters(function_type);
1063 if (n_params != rts_data[i].n_params)
1066 type_t *return_type = skip_typeref(function_type->return_type);
1067 int n_res = is_type_void(return_type) ? 0 : 1;
1068 if (n_res != rts_data[i].n_res)
1071 /* ignore those rts functions not necessary needed for current mode */
1072 if ((c_mode & rts_data[i].flags) == 0)
1074 assert(rts_entities[rts_data[i].id] == NULL);
1075 rts_entities[rts_data[i].id] = irentity;
1079 entitymap_insert(&entitymap, symbol, irentity);
1082 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1083 entity->function.irentity = irentity;
1089 * Creates a SymConst for a given entity.
1091 * @param dbgi debug info
1092 * @param entity the entity
1094 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1096 assert(entity != NULL);
1097 union symconst_symbol sym;
1098 sym.entity_p = entity;
1099 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1102 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1104 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1107 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1109 ir_mode *value_mode = get_irn_mode(value);
1111 if (value_mode == dest_mode)
1114 return new_d_Conv(dbgi, value, dest_mode);
1117 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1119 ir_mode *const mode = get_ir_mode_storage(type);
1120 return create_conv(dbgi, val, mode);
1124 * Creates a SymConst node representing a string constant.
1126 * @param src_pos the source position of the string constant
1127 * @param id_prefix a prefix for the name of the generated string constant
1128 * @param value the value of the string constant
1130 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1132 size_t const slen = get_string_len(value) + 1;
1133 ir_initializer_t *const initializer = create_initializer_compound(slen);
1134 ir_type * elem_type;
1135 switch (value->encoding) {
1136 case STRING_ENCODING_CHAR:
1137 case STRING_ENCODING_UTF8: {
1138 elem_type = ir_type_char;
1140 ir_mode *const mode = get_type_mode(elem_type);
1141 char const *p = value->begin;
1142 for (size_t i = 0; i < slen; ++i) {
1143 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1144 ir_initializer_t *val = create_initializer_tarval(tv);
1145 set_initializer_compound_value(initializer, i, val);
1152 case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1153 case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1154 case STRING_ENCODING_WIDE: type = type_wchar_t; goto init_wide;
1156 elem_type = get_ir_type(type);
1158 ir_mode *const mode = get_type_mode(elem_type);
1159 char const *p = value->begin;
1160 for (size_t i = 0; i < slen; ++i) {
1161 assert(p <= value->begin + value->size);
1162 utf32 v = read_utf8_char(&p);
1163 ir_tarval *tv = new_tarval_from_long(v, mode);
1164 ir_initializer_t *val = create_initializer_tarval(tv);
1165 set_initializer_compound_value(initializer, i, val);
1170 panic("invalid string encoding");
1173 ir_type *const type = new_type_array(1, elem_type);
1174 set_array_bounds_int(type, 0, 0, slen);
1175 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1176 set_type_state( type, layout_fixed);
1178 ir_type *const global_type = get_glob_type();
1179 ident *const id = id_unique(id_prefix);
1180 dbg_info *const dbgi = get_dbg_info(src_pos);
1181 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1182 set_entity_ld_ident( entity, id);
1183 set_entity_visibility( entity, ir_visibility_private);
1184 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1185 set_entity_initializer(entity, initializer);
1187 return create_symconst(dbgi, entity);
1190 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1192 assert(type->kind == TYPE_ATOMIC || type->kind == TYPE_COMPLEX);
1193 atomic_type_kind_t akind = type->atomic.akind;
1195 ir_mode *const mode = atomic_modes[akind];
1196 char const *const str = literal->value.begin;
1197 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1198 if (tv == tarval_bad)
1201 literal->base.type = type;
1202 literal->target_value = tv;
1206 void determine_literal_type(literal_expression_t *const literal)
1208 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1210 /* -1: signed only, 0: any, 1: unsigned only */
1212 !is_type_signed(literal->base.type) ? 1 :
1213 literal->value.begin[0] == '0' ? 0 :
1214 -1; /* Decimal literals only try signed types. */
1216 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1217 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1219 if (try_create_integer(literal, literal->base.type))
1222 /* now try if the constant is small enough for some types */
1223 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1225 if (sign <= 0 && try_create_integer(literal, type_long))
1227 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1229 /* last try? then we should not report tarval_bad */
1231 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1232 if (sign <= 0 && try_create_integer(literal, type_long_long))
1237 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1238 bool res = try_create_integer(literal, type_unsigned_long_long);
1240 panic("internal error when parsing number literal");
1243 tarval_set_integer_overflow_mode(old_mode);
1247 * Creates a Const node representing a constant.
1249 static ir_node *literal_to_firm_(const literal_expression_t *literal,
1252 const char *string = literal->value.begin;
1253 size_t size = literal->value.size;
1256 switch (literal->base.kind) {
1257 case EXPR_LITERAL_INTEGER:
1258 assert(literal->target_value != NULL);
1259 tv = literal->target_value;
1262 case EXPR_LITERAL_FLOATINGPOINT:
1263 tv = new_tarval_from_str(string, size, mode);
1266 case EXPR_LITERAL_BOOLEAN:
1267 if (string[0] == 't') {
1268 tv = get_mode_one(mode);
1270 assert(string[0] == 'f');
1271 case EXPR_LITERAL_MS_NOOP:
1272 tv = get_mode_null(mode);
1277 panic("invalid literal kind");
1280 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1281 return new_d_Const(dbgi, tv);
1284 static ir_node *literal_to_firm(const literal_expression_t *literal)
1286 type_t *type = skip_typeref(literal->base.type);
1287 ir_mode *mode_storage = get_ir_mode_storage(type);
1288 return literal_to_firm_(literal, mode_storage);
1292 * Creates a Const node representing a character constant.
1294 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1296 type_t *type = skip_typeref(literal->base.type);
1297 ir_mode *mode = get_ir_mode_storage(type);
1298 const char *string = literal->value.begin;
1299 size_t size = literal->value.size;
1302 switch (literal->value.encoding) {
1303 case STRING_ENCODING_WIDE: {
1304 utf32 v = read_utf8_char(&string);
1306 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1308 tv = new_tarval_from_str(buf, len, mode);
1312 case STRING_ENCODING_CHAR: {
1315 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1316 if (size == 1 && char_is_signed) {
1317 v = (signed char)string[0];
1320 for (size_t i = 0; i < size; ++i) {
1321 v = (v << 8) | ((unsigned char)string[i]);
1325 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1327 tv = new_tarval_from_str(buf, len, mode);
1332 panic("invalid literal kind");
1335 dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1336 return new_d_Const(dbgi, tv);
1340 * Allocate an area of size bytes aligned at alignment
1343 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1345 static unsigned area_cnt = 0;
1348 ir_type *tp = new_type_array(1, ir_type_char);
1349 set_array_bounds_int(tp, 0, 0, size);
1350 set_type_alignment_bytes(tp, alignment);
1352 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1353 ident *name = new_id_from_str(buf);
1354 ir_entity *area = new_entity(frame_type, name, tp);
1356 /* mark this entity as compiler generated */
1357 set_entity_compiler_generated(area, 1);
1362 * Return a node representing a trampoline region
1363 * for a given function entity.
1365 * @param dbgi debug info
1366 * @param entity the function entity
1368 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1370 ir_entity *region = NULL;
1373 if (current_trampolines != NULL) {
1374 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1375 if (current_trampolines[i].function == entity) {
1376 region = current_trampolines[i].region;
1381 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1383 ir_graph *irg = current_ir_graph;
1384 if (region == NULL) {
1385 /* create a new region */
1386 ir_type *frame_tp = get_irg_frame_type(irg);
1387 trampoline_region reg;
1388 reg.function = entity;
1390 reg.region = alloc_trampoline(frame_tp,
1391 be_params->trampoline_size,
1392 be_params->trampoline_align);
1393 ARR_APP1(trampoline_region, current_trampolines, reg);
1394 region = reg.region;
1396 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1401 * Creates a trampoline for a function represented by an entity.
1403 * @param dbgi debug info
1404 * @param mode the (reference) mode for the function address
1405 * @param entity the function entity
1407 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1410 assert(entity != NULL);
1412 in[0] = get_trampoline_region(dbgi, entity);
1413 in[1] = create_symconst(dbgi, entity);
1414 in[2] = get_irg_frame(current_ir_graph);
1416 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1417 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1418 return new_Proj(irn, mode, pn_Builtin_max+1);
1422 * Dereference an address.
1424 * @param dbgi debug info
1425 * @param type the type of the dereferenced result (the points_to type)
1426 * @param addr the address to dereference
1428 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1429 ir_node *const addr)
1431 type_t *skipped = skip_typeref(type);
1432 if (is_type_incomplete(skipped))
1435 ir_type *irtype = get_ir_type(skipped);
1436 if (is_compound_type(irtype)
1437 || is_Method_type(irtype)
1438 || is_Array_type(irtype)) {
1442 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1443 ? cons_volatile : cons_none;
1444 ir_mode *const mode = get_type_mode(irtype);
1445 ir_node *const memory = get_store();
1446 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1447 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1448 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1450 set_store(load_mem);
1455 * Returns the correct base address depending on whether it is a parameter or a
1456 * normal local variable.
1458 static ir_node *get_local_frame(ir_entity *const ent)
1460 ir_graph *const irg = current_ir_graph;
1461 const ir_type *const owner = get_entity_owner(ent);
1462 if (owner == current_outer_frame) {
1463 assert(current_static_link != NULL);
1464 return current_static_link;
1466 return get_irg_frame(irg);
1471 * Keep the current block and memory.
1472 * This is necessary for all loops, because they could become infinite.
1474 static void keep_loop(void)
1476 keep_alive(get_cur_block());
1477 keep_alive(get_store());
1480 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1482 entity_t *entity = ref->entity;
1483 if (entity->enum_value.tv == NULL) {
1484 type_t *type = skip_typeref(entity->enum_value.enum_type);
1485 assert(type->kind == TYPE_ENUM);
1486 determine_enum_values(&type->enumt);
1489 return new_Const(entity->enum_value.tv);
1492 static ir_node *reference_addr(const reference_expression_t *ref)
1494 dbg_info *dbgi = get_dbg_info(&ref->base.pos);
1495 entity_t *entity = ref->entity;
1496 assert(is_declaration(entity));
1498 if (entity->kind == ENTITY_FUNCTION
1499 && entity->function.btk != BUILTIN_NONE) {
1500 ir_entity *irentity = get_function_entity(entity, NULL);
1501 /* for gcc compatibility we have to produce (dummy) addresses for some
1502 * builtins which don't have entities */
1503 if (irentity == NULL) {
1504 position_t const *const pos = &ref->base.pos;
1505 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1507 /* simply create a NULL pointer */
1508 ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1509 return new_Const(get_mode_null(mode));
1513 switch ((declaration_kind_t) entity->declaration.kind) {
1514 case DECLARATION_KIND_UNKNOWN:
1516 case DECLARATION_KIND_PARAMETER:
1517 case DECLARATION_KIND_LOCAL_VARIABLE:
1518 /* you can store to a local variable (so we don't panic but return NULL
1519 * as an indicator for no real address) */
1521 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1522 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1526 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1527 case DECLARATION_KIND_PARAMETER_ENTITY: {
1528 ir_entity *irentity = entity->variable.v.entity;
1529 ir_node *frame = get_local_frame(irentity);
1530 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1534 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1535 return entity->variable.v.vla_base;
1537 case DECLARATION_KIND_FUNCTION: {
1538 return create_symconst(dbgi, entity->function.irentity);
1541 case DECLARATION_KIND_INNER_FUNCTION: {
1542 type_t *const type = skip_typeref(entity->declaration.type);
1543 ir_mode *const mode = get_ir_mode_storage(type);
1544 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1545 /* inner function not using the closure */
1546 return create_symconst(dbgi, entity->function.irentity);
1548 /* need trampoline here */
1549 return create_trampoline(dbgi, mode, entity->function.irentity);
1553 case DECLARATION_KIND_COMPOUND_MEMBER:
1554 panic("not implemented reference type");
1557 panic("reference to declaration with unknown type");
1560 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1562 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
1563 entity_t *const entity = ref->entity;
1564 assert(is_declaration(entity));
1566 switch ((declaration_kind_t)entity->declaration.kind) {
1567 case DECLARATION_KIND_LOCAL_VARIABLE:
1568 case DECLARATION_KIND_PARAMETER: {
1569 type_t *const type = skip_typeref(entity->declaration.type);
1570 ir_mode *const mode = get_ir_mode_storage(type);
1571 return get_value(entity->variable.v.value_number, mode);
1575 ir_node *const addr = reference_addr(ref);
1576 return deref_address(dbgi, entity->declaration.type, addr);
1582 * Transform calls to builtin functions.
1584 static ir_node *process_builtin_call(const call_expression_t *call)
1586 dbg_info *dbgi = get_dbg_info(&call->base.pos);
1588 assert(call->function->kind == EXPR_REFERENCE);
1589 reference_expression_t *builtin = &call->function->reference;
1591 type_t *expr_type = skip_typeref(builtin->base.type);
1592 assert(is_type_pointer(expr_type));
1594 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1596 switch (builtin->entity->function.btk) {
1599 case BUILTIN_ALLOCA: {
1600 expression_t *argument = call->arguments->expression;
1601 ir_node *size = expression_to_value(argument);
1603 ir_node *store = get_store();
1604 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1606 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1608 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1613 type_t *type = function_type->function.return_type;
1614 ir_mode *mode = get_ir_mode_storage(type);
1615 ir_tarval *tv = get_mode_infinite(mode);
1616 ir_node *res = new_d_Const(dbgi, tv);
1620 /* Ignore string for now... */
1621 assert(is_type_function(function_type));
1622 type_t *type = function_type->function.return_type;
1623 ir_mode *mode = get_ir_mode_storage(type);
1624 ir_tarval *tv = get_mode_NAN(mode);
1625 ir_node *res = new_d_Const(dbgi, tv);
1628 case BUILTIN_EXPECT: {
1629 expression_t *argument = call->arguments->expression;
1630 return expression_to_value(argument);
1632 case BUILTIN_VA_END:
1633 /* evaluate the argument of va_end for its side effects */
1634 expression_to_value(call->arguments->expression);
1636 case BUILTIN_OBJECT_SIZE: {
1637 /* determine value of "type" */
1638 expression_t *type_expression = call->arguments->next->expression;
1639 long type_val = fold_constant_to_int(type_expression);
1640 type_t *type = function_type->function.return_type;
1641 ir_mode *mode = get_ir_mode_storage(type);
1642 /* just produce a "I don't know" result */
1643 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1644 get_mode_minus_one(mode);
1646 return new_d_Const(dbgi, result);
1648 case BUILTIN_ROTL: {
1649 ir_node *val = expression_to_value(call->arguments->expression);
1650 ir_node *shf = expression_to_value(call->arguments->next->expression);
1651 ir_mode *mode = get_irn_mode(val);
1652 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1653 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1655 case BUILTIN_ROTR: {
1656 ir_node *val = expression_to_value(call->arguments->expression);
1657 ir_node *shf = expression_to_value(call->arguments->next->expression);
1658 ir_mode *mode = get_irn_mode(val);
1659 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1660 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1661 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1662 return new_d_Rotl(dbgi, val, sub, mode);
1667 case BUILTIN_LIBC_CHECK:
1668 panic("builtin did not produce an entity");
1670 panic("invalid builtin");
1673 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
1674 complex_value value);
1677 * Transform a call expression.
1678 * Handles some special cases, like alloca() calls, which must be resolved
1679 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1680 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1683 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1685 dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1686 assert(currently_reachable());
1688 expression_t *function = call->function;
1689 ir_node *callee = NULL;
1690 bool firm_builtin = false;
1691 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1692 if (function->kind == EXPR_REFERENCE) {
1693 const reference_expression_t *ref = &function->reference;
1694 entity_t *entity = ref->entity;
1696 if (entity->kind == ENTITY_FUNCTION) {
1697 builtin_kind_t builtin = entity->function.btk;
1698 if (builtin == BUILTIN_FIRM) {
1699 firm_builtin = true;
1700 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1701 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1702 && builtin != BUILTIN_LIBC_CHECK) {
1703 return process_builtin_call(call);
1708 callee = expression_to_value(function);
1710 type_t *type = skip_typeref(function->base.type);
1711 assert(is_type_pointer(type));
1712 pointer_type_t *pointer_type = &type->pointer;
1713 type_t *points_to = skip_typeref(pointer_type->points_to);
1714 assert(is_type_function(points_to));
1715 function_type_t *function_type = &points_to->function;
1717 int n_parameters = 0;
1718 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1719 ir_type *new_method_type = NULL;
1720 if (function_type->variadic || function_type->unspecified_parameters) {
1721 const call_argument_t *argument = call->arguments;
1722 for ( ; argument != NULL; argument = argument->next) {
1726 /* we need to construct a new method type matching the call
1728 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1729 int n_res = get_method_n_ress(ir_method_type);
1730 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1731 set_method_calling_convention(new_method_type,
1732 get_method_calling_convention(ir_method_type));
1733 set_method_additional_properties(new_method_type,
1734 get_method_additional_properties(ir_method_type));
1735 set_method_variadicity(new_method_type,
1736 get_method_variadicity(ir_method_type));
1738 for (int i = 0; i < n_res; ++i) {
1739 set_method_res_type(new_method_type, i,
1740 get_method_res_type(ir_method_type, i));
1742 argument = call->arguments;
1743 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1744 expression_t *expression = argument->expression;
1745 ir_type *irtype = get_ir_type(expression->base.type);
1746 set_method_param_type(new_method_type, i, irtype);
1748 ir_method_type = new_method_type;
1750 n_parameters = get_method_n_params(ir_method_type);
1753 ir_node *in[n_parameters];
1755 const call_argument_t *argument = call->arguments;
1756 for (int n = 0; n < n_parameters; ++n) {
1757 expression_t *expression = argument->expression;
1758 type_t *const arg_type = skip_typeref(expression->base.type);
1759 if (is_type_complex(arg_type)) {
1760 complex_value value = expression_to_complex(expression);
1761 in[n] = complex_to_memory(dbgi, arg_type, value);
1763 in[n] = conv_to_storage_type(dbgi, expression_to_value(expression), arg_type);
1766 argument = argument->next;
1770 if (function_type->modifiers & DM_CONST) {
1771 store = get_irg_no_mem(current_ir_graph);
1773 store = get_store();
1777 type_t *return_type = skip_typeref(function_type->return_type);
1778 ir_node *result = NULL;
1780 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1782 if (! (function_type->modifiers & DM_CONST)) {
1783 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1787 if (!is_type_void(return_type)) {
1788 assert(is_type_scalar(return_type));
1789 ir_mode *mode = get_ir_mode_storage(return_type);
1790 result = new_Proj(node, mode, pn_Builtin_max+1);
1793 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1794 if (! (function_type->modifiers & DM_CONST)) {
1795 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1799 if (!is_type_void(return_type)) {
1800 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1801 ir_mode *const mode = get_ir_mode_storage(return_type);
1802 result = new_Proj(resproj, mode, 0);
1806 if (function_type->modifiers & DM_NORETURN) {
1807 /* A dead end: Keep the Call and the Block. Also place all further
1808 * nodes into a new and unreachable block. */
1810 keep_alive(get_cur_block());
1811 ir_node *block = new_Block(0, NULL);
1812 set_cur_block(block);
1818 static ir_node *statement_to_firm(statement_t *statement);
1819 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1820 static ir_node *expression_to_addr(const expression_t *expression);
1822 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1825 value = conv_to_storage_type(dbgi, value, type);
1827 ir_node *memory = get_store();
1829 if (is_type_scalar(type) && !is_type_complex(type)) {
1830 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1831 ? cons_volatile : cons_none;
1832 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1833 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1834 set_store(store_mem);
1836 ir_type *irtype = get_ir_type(type);
1837 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1838 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1839 set_store(copyb_mem);
1843 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1845 ir_tarval *all_one = get_mode_all_one(mode);
1846 int mode_size = get_mode_size_bits(mode);
1847 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1849 assert(offset >= 0);
1851 assert(offset + size <= mode_size);
1852 if (size == mode_size) {
1856 long shiftr = get_mode_size_bits(mode) - size;
1857 long shiftl = offset;
1858 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1859 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1860 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1861 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1866 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1867 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1870 ir_type *entity_type = get_entity_type(entity);
1871 ir_type *base_type = get_primitive_base_type(entity_type);
1872 ir_mode *mode = get_type_mode(base_type);
1873 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1875 value = create_conv(dbgi, value, mode);
1877 /* kill upper bits of value and shift to right position */
1878 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1879 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1880 unsigned base_bits = get_mode_size_bits(mode);
1881 unsigned shiftwidth = base_bits - bitsize;
1883 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1884 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1886 unsigned shrwidth = base_bits - bitsize - bitoffset;
1887 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1888 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1890 /* load current value */
1891 ir_node *mem = get_store();
1892 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1893 set_volatile ? cons_volatile : cons_none);
1894 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1895 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1896 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1897 ir_tarval *inv_mask = tarval_not(shift_mask);
1898 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1899 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1901 /* construct new value and store */
1902 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1903 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1904 set_volatile ? cons_volatile : cons_none);
1905 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1906 set_store(store_mem);
1912 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1913 if (mode_is_signed(mode)) {
1914 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1916 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1921 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1924 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1925 entity_t *entity = expression->compound_entry;
1926 type_t *base_type = entity->declaration.type;
1927 ir_mode *mode = get_ir_mode_storage(base_type);
1928 ir_node *mem = get_store();
1929 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1930 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1931 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1932 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1934 ir_mode *amode = mode;
1935 /* optimisation, since shifting in modes < machine_size is usually
1937 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1940 unsigned amode_size = get_mode_size_bits(amode);
1941 load_res = create_conv(dbgi, load_res, amode);
1943 set_store(load_mem);
1945 /* kill upper bits */
1946 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1947 unsigned bitoffset = entity->compound_member.bit_offset;
1948 unsigned bitsize = entity->compound_member.bit_size;
1949 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1950 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1951 ir_node *countl = new_d_Const(dbgi, tvl);
1952 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1954 unsigned shift_bitsr = bitoffset + shift_bitsl;
1955 assert(shift_bitsr <= amode_size);
1956 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1957 ir_node *countr = new_d_Const(dbgi, tvr);
1959 if (mode_is_signed(mode)) {
1960 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1962 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1965 return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1968 /* make sure the selected compound type is constructed */
1969 static void construct_select_compound(const select_expression_t *expression)
1971 type_t *type = skip_typeref(expression->compound->base.type);
1972 if (is_type_pointer(type)) {
1973 type = type->pointer.points_to;
1975 (void) get_ir_type(type);
1978 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1979 ir_node *value, ir_node *addr)
1981 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1982 type_t *type = skip_typeref(expression->base.type);
1983 value = conv_to_storage_type(dbgi, value, type);
1985 if (expression->kind == EXPR_REFERENCE) {
1986 const reference_expression_t *ref = &expression->reference;
1988 entity_t *entity = ref->entity;
1989 assert(is_declaration(entity));
1990 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1991 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1992 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1993 set_value(entity->variable.v.value_number, value);
1999 addr = expression_to_addr(expression);
2000 assert(addr != NULL);
2002 if (expression->kind == EXPR_SELECT) {
2003 const select_expression_t *select = &expression->select;
2005 construct_select_compound(select);
2007 entity_t *entity = select->compound_entry;
2008 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2009 if (entity->compound_member.bitfield) {
2010 ir_entity *irentity = entity->compound_member.entity;
2012 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2013 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2014 set_volatile, true);
2019 assign_value(dbgi, addr, type, value);
2023 static ir_node *get_value_from_lvalue(const expression_t *expression,
2026 if (expression->kind == EXPR_REFERENCE) {
2027 const reference_expression_t *ref = &expression->reference;
2029 entity_t *entity = ref->entity;
2030 assert(entity->kind == ENTITY_VARIABLE
2031 || entity->kind == ENTITY_PARAMETER);
2032 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2034 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2035 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2036 value_number = entity->variable.v.value_number;
2037 assert(addr == NULL);
2038 type_t *type = skip_typeref(expression->base.type);
2039 ir_mode *mode = get_ir_mode_storage(type);
2040 return get_value(value_number, mode);
2044 assert(addr != NULL);
2045 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2048 if (expression->kind == EXPR_SELECT &&
2049 expression->select.compound_entry->compound_member.bitfield) {
2050 construct_select_compound(&expression->select);
2051 value = bitfield_extract_to_firm(&expression->select, addr);
2053 value = deref_address(dbgi, expression->base.type, addr);
2059 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2061 type_t *const type = skip_typeref(expr->base.type);
2062 ir_mode *const mode = get_ir_mode_arithmetic(type);
2065 if (is_type_pointer(type)) {
2066 offset = get_type_size_node(type->pointer.points_to);
2068 assert(is_type_arithmetic(type));
2069 offset = new_Const(get_mode_one(mode));
2072 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2073 expression_t const *const value_expr = expr->value;
2074 ir_node *const addr = expression_to_addr(value_expr);
2075 ir_node *const value = get_value_from_lvalue(value_expr, addr);
2076 ir_node *const value_arith = create_conv(dbgi, value, mode);
2077 ir_node *const new_value = inc
2078 ? new_d_Add(dbgi, value_arith, offset, mode)
2079 : new_d_Sub(dbgi, value_arith, offset, mode);
2081 ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2082 return pre ? store_value : value;
2085 static bool is_local_variable(expression_t *expression)
2087 if (expression->kind != EXPR_REFERENCE)
2089 reference_expression_t *ref_expr = &expression->reference;
2090 entity_t *entity = ref_expr->entity;
2091 if (entity->kind != ENTITY_VARIABLE)
2093 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2094 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2097 static ir_relation get_relation(const expression_kind_t kind)
2100 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2101 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2102 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2103 case EXPR_BINARY_ISLESS:
2104 case EXPR_BINARY_LESS: return ir_relation_less;
2105 case EXPR_BINARY_ISLESSEQUAL:
2106 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2107 case EXPR_BINARY_ISGREATER:
2108 case EXPR_BINARY_GREATER: return ir_relation_greater;
2109 case EXPR_BINARY_ISGREATEREQUAL:
2110 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2111 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2116 panic("trying to get ir_relation from non-comparison binexpr type");
2120 * Handle the assume optimizer hint: check if a Confirm
2121 * node can be created.
2123 * @param dbi debug info
2124 * @param expr the IL assume expression
2126 * we support here only some simple cases:
2131 static ir_node *handle_assume_compare(dbg_info *dbi,
2132 const binary_expression_t *expression)
2134 expression_t *op1 = expression->left;
2135 expression_t *op2 = expression->right;
2136 entity_t *var2, *var = NULL;
2137 ir_node *res = NULL;
2138 ir_relation relation = get_relation(expression->base.kind);
2140 if (is_local_variable(op1) && is_local_variable(op2)) {
2141 var = op1->reference.entity;
2142 var2 = op2->reference.entity;
2144 type_t *const type = skip_typeref(var->declaration.type);
2145 ir_mode *const mode = get_ir_mode_storage(type);
2147 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2148 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2150 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2151 set_value(var2->variable.v.value_number, res);
2153 res = new_d_Confirm(dbi, irn1, irn2, relation);
2154 set_value(var->variable.v.value_number, res);
2159 expression_t *con = NULL;
2160 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2161 var = op1->reference.entity;
2163 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2164 relation = get_inversed_relation(relation);
2165 var = op2->reference.entity;
2170 type_t *const type = skip_typeref(var->declaration.type);
2171 ir_mode *const mode = get_ir_mode_storage(type);
2173 res = get_value(var->variable.v.value_number, mode);
2174 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2175 set_value(var->variable.v.value_number, res);
2181 * Handle the assume optimizer hint.
2183 * @param dbi debug info
2184 * @param expr the IL assume expression
2186 static ir_node *handle_assume(expression_t const *const expr)
2188 switch (expr->kind) {
2189 case EXPR_BINARY_EQUAL:
2190 case EXPR_BINARY_NOTEQUAL:
2191 case EXPR_BINARY_LESS:
2192 case EXPR_BINARY_LESSEQUAL:
2193 case EXPR_BINARY_GREATER:
2194 case EXPR_BINARY_GREATEREQUAL: {
2195 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2196 return handle_assume_compare(dbgi, &expr->binary);
2204 static ir_node *create_cast(unary_expression_t const *const expr)
2206 type_t *const type = skip_typeref(expr->base.type);
2207 if (is_type_void(type))
2210 ir_node *value = expression_to_value(expr->value);
2211 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2212 type_t *const from_type = skip_typeref(expr->value->base.type);
2213 ir_mode *const mode = get_ir_mode_storage(type);
2214 /* check for conversion from / to __based types */
2215 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2216 const variable_t *from_var = from_type->pointer.base_variable;
2217 const variable_t *to_var = type->pointer.base_variable;
2218 if (from_var != to_var) {
2219 if (from_var != NULL) {
2220 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2221 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2222 value = new_d_Add(dbgi, value, base, mode);
2224 if (to_var != NULL) {
2225 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2226 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2227 value = new_d_Sub(dbgi, value, base, mode);
2232 return create_conv(dbgi, value, mode);
2235 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2237 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2238 type_t *const type = skip_typeref(expr->base.type);
2239 ir_mode *const mode = get_ir_mode_arithmetic(type);
2240 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2241 return new_d_Not(dbgi, value, mode);
2244 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2246 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2247 ir_node *value = expression_to_value(expr->value);
2248 type_t *const value_type = skip_typeref(expr->value->base.type);
2249 assert(is_type_pointer(value_type));
2251 /* check for __based */
2252 variable_t const *const base_var = value_type->pointer.base_variable;
2254 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2255 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2256 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2258 type_t *const points_to = value_type->pointer.points_to;
2259 return deref_address(dbgi, points_to, value);
2262 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2264 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2265 type_t *const type = skip_typeref(expr->base.type);
2266 ir_mode *const mode = get_ir_mode_arithmetic(type);
2267 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2268 return new_d_Minus(dbgi, value, mode);
2271 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2272 ir_node *value, type_t *type)
2274 ir_mode *const mode = get_ir_mode_storage(type_ptrdiff_t);
2275 assert(is_type_pointer(type));
2276 pointer_type_t *const pointer_type = &type->pointer;
2277 type_t *const points_to = skip_typeref(pointer_type->points_to);
2278 ir_node * elem_size = get_type_size_node(points_to);
2279 elem_size = create_conv(dbgi, elem_size, mode);
2280 value = create_conv(dbgi, value, mode);
2281 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2285 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2288 ir_node *pin = new_Pin(new_NoMem());
2289 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2290 op_pin_state_floats);
2291 return new_d_Proj(dbgi, op, mode, pn_Div_res);
2294 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2297 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2298 type_t *const type_left = skip_typeref(expr->left->base.type);
2299 type_t *const type_right = skip_typeref(expr->right->base.type);
2300 expression_kind_t const kind = expr->base.kind;
2302 case EXPR_BINARY_SHIFTLEFT:
2303 case EXPR_BINARY_SHIFTRIGHT:
2304 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2305 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2306 mode = get_ir_mode_arithmetic(expr->base.type);
2307 left = create_conv(dbgi, left, mode);
2308 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2311 case EXPR_BINARY_SUB:
2312 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2313 const pointer_type_t *const ptr_type = &type_left->pointer;
2315 mode = get_ir_mode_storage(expr->base.type);
2316 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2317 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2318 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2319 ir_node *const no_mem = new_NoMem();
2320 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2321 mode, op_pin_state_floats);
2322 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2325 case EXPR_BINARY_SUB_ASSIGN:
2326 if (is_type_pointer(type_left)) {
2327 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2328 mode = get_ir_mode_storage(type_left);
2333 case EXPR_BINARY_ADD:
2334 case EXPR_BINARY_ADD_ASSIGN:
2335 if (is_type_pointer(type_left)) {
2336 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2337 mode = get_ir_mode_storage(type_left);
2339 } else if (is_type_pointer(type_right)) {
2340 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2341 mode = get_ir_mode_storage(type_right);
2348 mode = get_ir_mode_arithmetic(type_right);
2349 left = create_conv(dbgi, left, mode);
2350 right = create_conv(dbgi, right, mode);
2355 case EXPR_BINARY_ADD_ASSIGN:
2356 case EXPR_BINARY_ADD:
2357 return new_d_Add(dbgi, left, right, mode);
2358 case EXPR_BINARY_SUB_ASSIGN:
2359 case EXPR_BINARY_SUB:
2360 return new_d_Sub(dbgi, left, right, mode);
2361 case EXPR_BINARY_MUL_ASSIGN:
2362 case EXPR_BINARY_MUL:
2363 return new_d_Mul(dbgi, left, right, mode);
2364 case EXPR_BINARY_DIV:
2365 case EXPR_BINARY_DIV_ASSIGN:
2366 return create_div(dbgi, left, right, mode);
2367 case EXPR_BINARY_BITWISE_AND:
2368 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2369 return new_d_And(dbgi, left, right, mode);
2370 case EXPR_BINARY_BITWISE_OR:
2371 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2372 return new_d_Or(dbgi, left, right, mode);
2373 case EXPR_BINARY_BITWISE_XOR:
2374 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2375 return new_d_Eor(dbgi, left, right, mode);
2376 case EXPR_BINARY_SHIFTLEFT:
2377 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2378 return new_d_Shl(dbgi, left, right, mode);
2379 case EXPR_BINARY_SHIFTRIGHT:
2380 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2381 if (mode_is_signed(mode)) {
2382 return new_d_Shrs(dbgi, left, right, mode);
2384 return new_d_Shr(dbgi, left, right, mode);
2386 case EXPR_BINARY_MOD:
2387 case EXPR_BINARY_MOD_ASSIGN: {
2388 ir_node *pin = new_Pin(new_NoMem());
2389 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2390 op_pin_state_floats);
2391 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2395 panic("unexpected expression kind");
2399 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2401 ir_node *const left = expression_to_value(expr->left);
2402 ir_node *const right = expression_to_value(expr->right);
2403 return create_op(expr, left, right);
2407 * Check if a given expression is a GNU __builtin_expect() call.
2409 static bool is_builtin_expect(const expression_t *expression)
2411 if (expression->kind != EXPR_CALL)
2414 expression_t *function = expression->call.function;
2415 if (function->kind != EXPR_REFERENCE)
2417 reference_expression_t *ref = &function->reference;
2418 if (ref->entity->kind != ENTITY_FUNCTION ||
2419 ref->entity->function.btk != BUILTIN_EXPECT)
2425 static void compare_to_control_flow(expression_t const *const expr, ir_node *const left, ir_node *const right, ir_relation const relation, jump_target *const true_target, jump_target *const false_target)
2427 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2428 ir_node *const cmp = new_d_Cmp(dbgi, left, right, relation);
2429 if (is_Const(cmp)) {
2430 if (tarval_is_null(get_Const_tarval(cmp))) {
2431 jump_to_target(false_target);
2433 jump_to_target(true_target);
2436 ir_node *const cond = new_d_Cond(dbgi, cmp);
2437 ir_node *const true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2438 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2440 /* set branch prediction info based on __builtin_expect */
2441 if (is_builtin_expect(expr) && is_Cond(cond)) {
2442 call_argument_t *const argument = expr->call.arguments->next;
2443 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2444 bool const cnst = fold_constant_to_bool(argument->expression);
2445 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2446 set_Cond_jmp_pred(cond, pred);
2450 add_pred_to_jump_target(true_target, true_proj);
2451 add_pred_to_jump_target(false_target, false_proj);
2453 set_unreachable_now();
2456 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2458 ir_node *val = NULL;
2459 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2460 ir_mode *const mode = get_ir_mode_storage(expr->base.type);
2461 jump_target exit_target;
2462 init_jump_target(&exit_target, NULL);
2464 if (enter_jump_target(true_target)) {
2465 jump_to_target(&exit_target);
2466 val = new_d_Const(dbgi, get_mode_one(mode));
2469 if (enter_jump_target(false_target)) {
2470 jump_to_target(&exit_target);
2471 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2473 ir_node *const in[] = { val, zero };
2474 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2480 if (!enter_jump_target(&exit_target)) {
2481 set_cur_block(new_Block(0, NULL));
2482 val = new_d_Bad(dbgi, mode);
2487 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2489 ir_node *const right = expression_to_value(expr->right);
2490 expression_t const *const left_expr = expr->left;
2491 ir_node *const addr = expression_to_addr(left_expr);
2492 ir_node *const left = get_value_from_lvalue(left_expr, addr);
2493 ir_node *result = create_op(expr, left, right);
2495 type_t *const type = skip_typeref(expr->base.type);
2496 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2497 jump_target true_target;
2498 jump_target false_target;
2499 init_jump_target(&true_target, NULL);
2500 init_jump_target(&false_target, NULL);
2501 ir_mode *const mode = get_irn_mode(result);
2502 ir_node *const zero = new_Const(get_mode_null(mode));
2503 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2504 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2507 return set_value_for_expression_addr(left_expr, result, addr);
2510 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2512 ir_node *const addr = expression_to_addr(expr->left);
2513 ir_node *const right = expression_to_value(expr->right);
2514 return set_value_for_expression_addr(expr->left, right, addr);
2517 /** evaluate an expression and discard the result, but still produce the
2519 static void evaluate_expression_discard_result(const expression_t *expression)
2521 type_t *type = skip_typeref(expression->base.type);
2522 if (is_type_complex(type)) {
2523 expression_to_complex(expression);
2525 expression_to_value(expression);
2529 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2531 evaluate_expression_discard_result(expr->left);
2532 return expression_to_value(expr->right);
2535 static ir_node *array_access_addr(const array_access_expression_t *expression)
2537 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2538 ir_node *base_addr = expression_to_value(expression->array_ref);
2539 ir_node *offset = expression_to_value(expression->index);
2540 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2541 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2542 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2547 static ir_node *array_access_to_firm(
2548 const array_access_expression_t *expression)
2550 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2551 ir_node *addr = array_access_addr(expression);
2552 type_t *type = revert_automatic_type_conversion(
2553 (const expression_t*) expression);
2554 type = skip_typeref(type);
2556 return deref_address(dbgi, type, addr);
2559 static long get_offsetof_offset(const offsetof_expression_t *expression)
2561 type_t *orig_type = expression->type;
2564 designator_t *designator = expression->designator;
2565 for ( ; designator != NULL; designator = designator->next) {
2566 type_t *type = skip_typeref(orig_type);
2567 /* be sure the type is constructed */
2568 (void) get_ir_type(type);
2570 if (designator->symbol != NULL) {
2571 assert(is_type_compound(type));
2572 symbol_t *symbol = designator->symbol;
2574 compound_t *compound = type->compound.compound;
2575 entity_t *iter = compound->members.entities;
2576 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2578 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2579 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2580 offset += get_entity_offset(iter->compound_member.entity);
2582 orig_type = iter->declaration.type;
2584 expression_t *array_index = designator->array_index;
2585 assert(designator->array_index != NULL);
2586 assert(is_type_array(type));
2588 long index = fold_constant_to_int(array_index);
2589 ir_type *arr_type = get_ir_type(type);
2590 ir_type *elem_type = get_array_element_type(arr_type);
2591 long elem_size = get_type_size_bytes(elem_type);
2593 offset += index * elem_size;
2595 orig_type = type->array.element_type;
2602 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2604 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2605 long offset = get_offsetof_offset(expression);
2606 ir_tarval *tv = new_tarval_from_long(offset, mode);
2607 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2609 return new_d_Const(dbgi, tv);
2612 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2613 ir_entity *entity, type_t *type);
2614 static ir_initializer_t *create_ir_initializer(
2615 const initializer_t *initializer, type_t *type);
2617 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2618 initializer_t *initializer,
2621 /* create the ir_initializer */
2622 PUSH_IRG(get_const_code_irg());
2623 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2626 ident *const id = id_unique("initializer.%u");
2627 ir_type *const irtype = get_ir_type(type);
2628 ir_type *const global_type = get_glob_type();
2629 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2630 set_entity_ld_ident(entity, id);
2631 set_entity_visibility(entity, ir_visibility_private);
2632 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2633 set_entity_initializer(entity, irinitializer);
2637 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2639 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2640 type_t *type = expression->type;
2641 initializer_t *initializer = expression->initializer;
2643 if (expression->global_scope ||
2644 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2645 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2646 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2647 return create_symconst(dbgi, entity);
2649 /* create an entity on the stack */
2650 ident *const id = id_unique("CompLit.%u");
2651 ir_type *const irtype = get_ir_type(type);
2652 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2654 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2655 set_entity_ld_ident(entity, id);
2657 /* create initialisation code */
2658 create_local_initializer(initializer, dbgi, entity, type);
2660 /* create a sel for the compound literal address */
2661 ir_node *frame = get_irg_frame(current_ir_graph);
2662 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2667 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2669 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2670 type_t *const type = expr->type;
2671 ir_node *const addr = compound_literal_addr(expr);
2672 return deref_address(dbgi, type, addr);
2676 * Transform a sizeof expression into Firm code.
2678 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2680 type_t *const type = skip_typeref(expression->type);
2681 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2682 if (is_type_array(type) && type->array.is_vla
2683 && expression->tp_expression != NULL) {
2684 expression_to_value(expression->tp_expression);
2687 return get_type_size_node(type);
2690 static entity_t *get_expression_entity(const expression_t *expression)
2692 if (expression->kind != EXPR_REFERENCE)
2695 return expression->reference.entity;
2698 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2700 switch (entity->kind) {
2701 case DECLARATION_KIND_CASES:
2702 return entity->declaration.alignment;
2705 return entity->compound.alignment;
2706 case ENTITY_TYPEDEF:
2707 return entity->typedefe.alignment;
2715 * Transform an alignof expression into Firm code.
2717 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2719 unsigned alignment = 0;
2721 const expression_t *tp_expression = expression->tp_expression;
2722 if (tp_expression != NULL) {
2723 entity_t *entity = get_expression_entity(tp_expression);
2724 if (entity != NULL) {
2725 alignment = get_cparser_entity_alignment(entity);
2729 if (alignment == 0) {
2730 type_t *type = expression->type;
2731 alignment = get_type_alignment(type);
2734 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2735 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2736 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2737 return new_d_Const(dbgi, tv);
2740 static void init_ir_types(void);
2742 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2744 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2746 bool constant_folding_old = constant_folding;
2747 constant_folding = true;
2748 int old_optimize = get_optimize();
2749 int old_constant_folding = get_opt_constant_folding();
2751 set_opt_constant_folding(1);
2755 PUSH_IRG(get_const_code_irg());
2756 ir_node *const cnst = expression_to_value(expression);
2759 set_optimize(old_optimize);
2760 set_opt_constant_folding(old_constant_folding);
2761 constant_folding = constant_folding_old;
2763 if (!is_Const(cnst))
2764 panic("couldn't fold constant");
2765 return get_Const_tarval(cnst);
2768 static complex_constant fold_complex_constant(const expression_t *expression)
2770 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2772 bool constant_folding_old = constant_folding;
2773 constant_folding = true;
2774 int old_optimize = get_optimize();
2775 int old_constant_folding = get_opt_constant_folding();
2777 set_opt_constant_folding(1);
2781 PUSH_IRG(get_const_code_irg());
2782 complex_value value = expression_to_complex(expression);
2785 set_optimize(old_optimize);
2786 set_opt_constant_folding(old_constant_folding);
2788 if (!is_Const(value.real) || !is_Const(value.imag)) {
2789 panic("couldn't fold constant");
2792 constant_folding = constant_folding_old;
2794 return (complex_constant) {
2795 get_Const_tarval(value.real),
2796 get_Const_tarval(value.imag)
2800 /* this function is only used in parser.c, but it relies on libfirm functionality */
2801 bool constant_is_negative(const expression_t *expression)
2803 ir_tarval *tv = fold_constant_to_tarval(expression);
2804 return tarval_is_negative(tv);
2807 long fold_constant_to_int(const expression_t *expression)
2809 ir_tarval *tv = fold_constant_to_tarval(expression);
2810 if (!tarval_is_long(tv)) {
2811 panic("result of constant folding is not integer");
2814 return get_tarval_long(tv);
2817 bool fold_constant_to_bool(const expression_t *expression)
2819 type_t *type = skip_typeref(expression->base.type);
2820 if (is_type_complex(type)) {
2821 complex_constant tvs = fold_complex_constant(expression);
2822 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2824 ir_tarval *tv = fold_constant_to_tarval(expression);
2825 return !tarval_is_null(tv);
2829 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2831 jump_target true_target;
2832 jump_target false_target;
2833 init_jump_target(&true_target, NULL);
2834 init_jump_target(&false_target, NULL);
2835 ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2837 ir_node *val = NULL;
2838 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2839 type_t *const type = skip_typeref(expression->base.type);
2840 ir_mode *const mode = get_ir_mode_arithmetic(type);
2841 jump_target exit_target;
2842 init_jump_target(&exit_target, NULL);
2844 if (enter_jump_target(&true_target)) {
2845 if (expression->true_expression) {
2846 val = expression_to_value(expression->true_expression);
2847 } else if (cond_expr) {
2850 /* Condition ended with a short circuit (&&, ||, !) operation or a
2851 * comparison. Generate a "1" as value for the true branch. */
2852 val = new_Const(get_mode_one(mode));
2855 val = create_conv(dbgi, val, mode);
2856 jump_to_target(&exit_target);
2859 if (enter_jump_target(&false_target)) {
2860 ir_node *false_val = expression_to_value(expression->false_expression);
2862 false_val = create_conv(dbgi, false_val, mode);
2863 jump_to_target(&exit_target);
2865 ir_node *const in[] = { val, false_val };
2866 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2872 if (!enter_jump_target(&exit_target)) {
2873 set_cur_block(new_Block(0, NULL));
2874 if (!is_type_void(type))
2875 val = new_Bad(mode);
2881 * Returns an IR-node representing the address of a field.
2883 static ir_node *select_addr(const select_expression_t *expression)
2885 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2887 construct_select_compound(expression);
2889 ir_node *compound_addr = expression_to_value(expression->compound);
2891 entity_t *entry = expression->compound_entry;
2892 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2893 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2895 if (constant_folding) {
2896 ir_mode *mode = get_irn_mode(compound_addr);
2897 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2898 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2899 return new_d_Add(dbgi, compound_addr, ofs, mode);
2901 ir_entity *irentity = entry->compound_member.entity;
2902 assert(irentity != NULL);
2903 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2907 static ir_node *select_to_firm(const select_expression_t *expression)
2909 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2910 ir_node *addr = select_addr(expression);
2911 type_t *type = revert_automatic_type_conversion(
2912 (const expression_t*) expression);
2913 type = skip_typeref(type);
2915 entity_t *entry = expression->compound_entry;
2916 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2918 if (entry->compound_member.bitfield) {
2919 return bitfield_extract_to_firm(expression, addr);
2922 return deref_address(dbgi, type, addr);
2925 /* Values returned by __builtin_classify_type. */
2926 typedef enum gcc_type_class
2932 enumeral_type_class,
2935 reference_type_class,
2939 function_type_class,
2950 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2952 type_t *type = expr->type_expression->base.type;
2954 /* FIXME gcc returns different values depending on whether compiling C or C++
2955 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2958 type = skip_typeref(type);
2959 switch (type->kind) {
2961 const atomic_type_t *const atomic_type = &type->atomic;
2962 switch (atomic_type->akind) {
2963 /* gcc cannot do that */
2964 case ATOMIC_TYPE_VOID:
2965 tc = void_type_class;
2968 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2969 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2970 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2971 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2972 case ATOMIC_TYPE_SHORT:
2973 case ATOMIC_TYPE_USHORT:
2974 case ATOMIC_TYPE_INT:
2975 case ATOMIC_TYPE_UINT:
2976 case ATOMIC_TYPE_LONG:
2977 case ATOMIC_TYPE_ULONG:
2978 case ATOMIC_TYPE_LONGLONG:
2979 case ATOMIC_TYPE_ULONGLONG:
2980 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2981 tc = integer_type_class;
2984 case ATOMIC_TYPE_FLOAT:
2985 case ATOMIC_TYPE_DOUBLE:
2986 case ATOMIC_TYPE_LONG_DOUBLE:
2987 tc = real_type_class;
2990 panic("Unexpected atomic type.");
2993 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2994 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2995 case TYPE_ARRAY: /* gcc handles this as pointer */
2996 case TYPE_FUNCTION: /* gcc handles this as pointer */
2997 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2998 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2999 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3001 /* gcc handles this as integer */
3002 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3004 /* gcc classifies the referenced type */
3005 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3007 /* typedef/typeof should be skipped already */
3013 panic("unexpected type.");
3017 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3018 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3019 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3020 return new_d_Const(dbgi, tv);
3023 static ir_node *function_name_to_firm(
3024 const funcname_expression_t *const expr)
3026 switch (expr->kind) {
3027 case FUNCNAME_FUNCTION:
3028 case FUNCNAME_PRETTY_FUNCTION:
3029 case FUNCNAME_FUNCDNAME:
3030 if (current_function_name == NULL) {
3031 position_t const *const src_pos = &expr->base.pos;
3032 char const *const name = current_function_entity->base.symbol->string;
3033 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3034 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3036 return current_function_name;
3037 case FUNCNAME_FUNCSIG:
3038 if (current_funcsig == NULL) {
3039 position_t const *const src_pos = &expr->base.pos;
3040 ir_entity *const ent = get_irg_entity(current_ir_graph);
3041 char const *const name = get_entity_ld_name(ent);
3042 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3043 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3045 return current_funcsig;
3047 panic("Unsupported function name");
3050 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3052 statement_t *statement = expr->statement;
3054 assert(statement->kind == STATEMENT_COMPOUND);
3055 return compound_statement_to_firm(&statement->compound);
3058 static ir_node *va_start_expression_to_firm(
3059 const va_start_expression_t *const expr)
3061 ir_entity *param_ent = current_vararg_entity;
3062 if (param_ent == NULL) {
3063 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3064 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3065 ir_type *const param_type = get_unknown_type();
3066 param_ent = new_parameter_entity(frame_type, n, param_type);
3067 current_vararg_entity = param_ent;
3070 ir_node *const frame = get_irg_frame(current_ir_graph);
3071 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3072 ir_node *const no_mem = new_NoMem();
3073 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3075 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3080 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3082 type_t *const type = expr->base.type;
3083 expression_t *const ap_expr = expr->ap;
3084 ir_node *const ap_addr = expression_to_addr(ap_expr);
3085 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3086 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3087 ir_node *const res = deref_address(dbgi, type, ap);
3089 ir_node *const cnst = get_type_size_node(expr->base.type);
3090 ir_mode *const mode = get_irn_mode(cnst);
3091 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3092 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3093 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3094 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3095 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3097 set_value_for_expression_addr(ap_expr, add, ap_addr);
3103 * Generate Firm for a va_copy expression.
3105 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3107 ir_node *const src = expression_to_value(expr->src);
3108 set_value_for_expression_addr(expr->dst, src, NULL);
3112 static ir_node *dereference_addr(const unary_expression_t *const expression)
3114 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3115 return expression_to_value(expression->value);
3119 * Returns a IR-node representing an lvalue of the given expression.
3121 static ir_node *expression_to_addr(const expression_t *expression)
3123 switch (expression->kind) {
3124 case EXPR_ARRAY_ACCESS:
3125 return array_access_addr(&expression->array_access);
3126 case EXPR_COMPOUND_LITERAL:
3127 return compound_literal_addr(&expression->compound_literal);
3128 case EXPR_REFERENCE:
3129 return reference_addr(&expression->reference);
3131 return select_addr(&expression->select);
3132 case EXPR_UNARY_DEREFERENCE:
3133 return dereference_addr(&expression->unary);
3137 panic("trying to get address of non-lvalue");
3140 static ir_node *builtin_constant_to_firm(
3141 const builtin_constant_expression_t *expression)
3143 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3144 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3145 return create_Const_from_bool(mode, v);
3148 static ir_node *builtin_types_compatible_to_firm(
3149 const builtin_types_compatible_expression_t *expression)
3151 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3152 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3153 bool const value = types_compatible(left, right);
3154 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3155 return create_Const_from_bool(mode, value);
3158 static void prepare_label_target(label_t *const label)
3160 if (label->address_taken && !label->indirect_block) {
3161 ir_node *const iblock = new_immBlock();
3162 label->indirect_block = iblock;
3163 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3164 jump_from_block_to_target(&label->target, iblock);
3169 * Pointer to a label. This is used for the
3170 * GNU address-of-label extension.
3172 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3174 /* Beware: Might be called from create initializer with current_ir_graph
3175 * set to const_code_irg. */
3176 PUSH_IRG(current_function);
3177 prepare_label_target(label->label);
3180 symconst_symbol value;
3181 value.entity_p = create_Block_entity(label->label->indirect_block);
3182 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3183 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3186 static ir_node *expression_to_value(expression_t const *const expr)
3189 if (!constant_folding) {
3190 assert(!expr->base.transformed);
3191 ((expression_t*)expr)->base.transformed = true;
3193 assert(!is_type_complex(skip_typeref(expr->base.type)));
3196 switch (expr->kind) {
3197 case EXPR_UNARY_CAST:
3198 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3199 case EXPR_BINARY_EQUAL:
3200 case EXPR_BINARY_GREATER:
3201 case EXPR_BINARY_GREATEREQUAL:
3202 case EXPR_BINARY_ISGREATER:
3203 case EXPR_BINARY_ISGREATEREQUAL:
3204 case EXPR_BINARY_ISLESS:
3205 case EXPR_BINARY_ISLESSEQUAL:
3206 case EXPR_BINARY_ISLESSGREATER:
3207 case EXPR_BINARY_ISUNORDERED:
3208 case EXPR_BINARY_LESS:
3209 case EXPR_BINARY_LESSEQUAL:
3210 case EXPR_BINARY_LOGICAL_AND:
3211 case EXPR_BINARY_LOGICAL_OR:
3212 case EXPR_BINARY_NOTEQUAL:
3213 case EXPR_UNARY_NOT:;
3214 jump_target true_target;
3215 jump_target false_target;
3216 init_jump_target(&true_target, NULL);
3217 init_jump_target(&false_target, NULL);
3218 expression_to_control_flow(expr, &true_target, &false_target);
3219 return control_flow_to_1_0(expr, &true_target, &false_target);
3221 return create_cast(&expr->unary);
3224 case EXPR_BINARY_ADD:
3225 case EXPR_BINARY_BITWISE_AND:
3226 case EXPR_BINARY_BITWISE_OR:
3227 case EXPR_BINARY_BITWISE_XOR:
3228 case EXPR_BINARY_DIV:
3229 case EXPR_BINARY_MOD:
3230 case EXPR_BINARY_MUL:
3231 case EXPR_BINARY_SHIFTLEFT:
3232 case EXPR_BINARY_SHIFTRIGHT:
3233 case EXPR_BINARY_SUB:
3234 return binop_to_firm(&expr->binary);
3236 case EXPR_BINARY_ADD_ASSIGN:
3237 case EXPR_BINARY_BITWISE_AND_ASSIGN:
3238 case EXPR_BINARY_BITWISE_OR_ASSIGN:
3239 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3240 case EXPR_BINARY_DIV_ASSIGN:
3241 case EXPR_BINARY_MOD_ASSIGN:
3242 case EXPR_BINARY_MUL_ASSIGN:
3243 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3244 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3245 case EXPR_BINARY_SUB_ASSIGN:
3246 return binop_assign_to_firm(&expr->binary);
3251 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3252 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
3253 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
3254 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
3256 return incdec_to_firm(&expr->unary, inc, pre);
3259 case EXPR_UNARY_IMAG: {
3260 complex_value irvalue = expression_to_complex(expr->unary.value);
3261 return irvalue.imag;
3263 case EXPR_UNARY_REAL: {
3264 complex_value irvalue = expression_to_complex(expr->unary.value);
3265 return irvalue.real;
3268 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3269 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3270 case EXPR_BINARY_ASSIGN: return assign_expression_to_firm( &expr->binary);
3271 case EXPR_BINARY_COMMA: return comma_expression_to_firm( &expr->binary);
3272 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3273 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3274 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3275 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3276 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3277 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3278 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3279 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3280 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3281 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3282 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3283 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3284 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3285 case EXPR_SELECT: return select_to_firm( &expr->select);
3286 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3287 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3288 case EXPR_STRING_LITERAL: return string_to_firm( &expr->base.pos, "str.%u", &expr->string_literal.value);
3289 case EXPR_UNARY_ASSUME: return handle_assume( expr->unary.value);
3290 case EXPR_UNARY_COMPLEMENT: return complement_to_firm( &expr->unary);
3291 case EXPR_UNARY_DEREFERENCE: return dereference_to_firm( &expr->unary);
3292 case EXPR_UNARY_NEGATE: return negate_to_firm( &expr->unary);
3293 case EXPR_UNARY_PLUS: return expression_to_value( expr->unary.value);
3294 case EXPR_UNARY_TAKE_ADDRESS: return expression_to_addr( expr->unary.value);
3295 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3296 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3297 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3299 case EXPR_UNARY_DELETE:
3300 case EXPR_UNARY_DELETE_ARRAY:
3301 case EXPR_UNARY_THROW:
3302 panic("expression not implemented");
3307 panic("invalid expression");
3310 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3311 jump_target *const true_target, jump_target *const false_target,
3312 ir_relation relation);
3314 static complex_value complex_to_control_flow(const expression_t *expression,
3315 jump_target *true_target,
3316 jump_target *false_target);
3319 * create a short-circuit expression evaluation that tries to construct
3320 * efficient control flow structures for &&, || and ! expressions
3322 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3324 switch (expr->kind) {
3325 case EXPR_UNARY_NOT:
3326 expression_to_control_flow(expr->unary.value, false_target, true_target);
3329 case EXPR_BINARY_LOGICAL_AND: {
3330 jump_target extra_target;
3331 init_jump_target(&extra_target, NULL);
3332 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3333 if (enter_jump_target(&extra_target))
3334 expression_to_control_flow(expr->binary.right, true_target, false_target);
3338 case EXPR_BINARY_LOGICAL_OR: {
3339 jump_target extra_target;
3340 init_jump_target(&extra_target, NULL);
3341 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3342 if (enter_jump_target(&extra_target))
3343 expression_to_control_flow(expr->binary.right, true_target, false_target);
3347 case EXPR_BINARY_COMMA:
3348 evaluate_expression_discard_result(expr->binary.left);
3349 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3351 case EXPR_BINARY_EQUAL:
3352 case EXPR_BINARY_GREATER:
3353 case EXPR_BINARY_GREATEREQUAL:
3354 case EXPR_BINARY_ISGREATER:
3355 case EXPR_BINARY_ISGREATEREQUAL:
3356 case EXPR_BINARY_ISLESS:
3357 case EXPR_BINARY_ISLESSEQUAL:
3358 case EXPR_BINARY_ISLESSGREATER:
3359 case EXPR_BINARY_ISUNORDERED:
3360 case EXPR_BINARY_LESS:
3361 case EXPR_BINARY_LESSEQUAL:
3362 case EXPR_BINARY_NOTEQUAL: {
3363 type_t *const type = skip_typeref(expr->binary.left->base.type);
3364 ir_relation const relation = get_relation(expr->kind);
3365 if (is_type_complex(type)) {
3366 complex_equality_evaluation(&expr->binary, true_target,
3367 false_target, relation);
3371 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3372 ir_mode *const mode = get_ir_mode_arithmetic(type);
3373 ir_node *const left = create_conv(dbgi, expression_to_value(expr->binary.left), mode);
3374 ir_node *const right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3375 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3379 case EXPR_UNARY_CAST:
3380 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3381 expression_to_control_flow(expr->unary.value, true_target, false_target);
3385 type_t *const type = skip_typeref(expr->base.type);
3386 if (is_type_complex(type)) {
3387 complex_to_control_flow(expr, true_target, false_target);
3391 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3392 ir_mode *const mode = get_ir_mode_arithmetic(type);
3393 ir_node *const val = create_conv(dbgi, expression_to_value(expr), mode);
3394 ir_node *const left = val;
3395 ir_node *const right = new_Const(get_mode_null(get_irn_mode(val)));
3396 ir_relation const relation = ir_relation_unordered_less_greater;
3397 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3403 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3406 return (complex_value) {
3407 create_conv(dbgi, value.real, mode),
3408 create_conv(dbgi, value.imag, mode)
3412 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3413 complex_value const value, type_t *const type)
3415 ir_mode *const mode = get_complex_mode_storage(type);
3416 return complex_conv(dbgi, value, mode);
3419 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3420 complex_value value)
3422 value = complex_conv_to_storage(dbgi, value, type);
3423 ir_graph *const irg = current_ir_graph;
3424 ir_type *const irtype = get_ir_type(type);
3425 ir_node *const mem = get_store();
3426 ir_node *const nomem = get_irg_no_mem(irg);
3427 ir_mode *const mode = get_complex_mode_storage(type);
3428 ir_node *const real = create_conv(dbgi, value.real, mode);
3429 ir_node *const imag = create_conv(dbgi, value.imag, mode);
3430 ir_node *const storer = new_d_Store(dbgi, mem, addr, real, cons_floats);
3431 ir_node *const memr = new_Proj(storer, mode_M, pn_Store_M);
3432 ir_mode *const muint = atomic_modes[ATOMIC_TYPE_UINT];
3433 ir_node *const one = new_Const(get_mode_one(muint));
3434 ir_node *const in[1] = { one };
3435 ir_entity *const arrent = get_array_element_entity(irtype);
3436 ir_node *const addri = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3437 ir_node *const storei = new_d_Store(dbgi, memr, addri, imag, cons_floats);
3438 ir_node *const memi = new_Proj(storei, mode_M, pn_Store_M);
3442 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3443 complex_value value)
3445 ir_graph *const irg = current_ir_graph;
3446 ir_type *const frame_type = get_irg_frame_type(irg);
3447 ident *const id = id_unique("cmplex_tmp.%u");
3448 ir_type *const irtype = get_ir_type(type);
3449 ir_entity *const tmp_storage = new_entity(frame_type, id, irtype);
3450 ir_node *const frame = get_irg_frame(irg);
3451 ir_node *const nomem = get_irg_no_mem(irg);
3452 ir_node *const addr = new_simpleSel(nomem, frame, tmp_storage);
3453 set_entity_compiler_generated(tmp_storage, 1);
3454 store_complex(dbgi, addr, type, value);
3458 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3460 assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3461 || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3462 type_t *const type = skip_typeref(entity->declaration.type);
3463 ir_mode *const mode = get_complex_mode_storage(type);
3464 ir_node *const real = get_value(entity->variable.v.value_number, mode);
3465 ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3466 ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3467 return (complex_value) {
3468 create_conv(dbgi, real, mode_arithmetic),
3469 create_conv(dbgi, imag, mode_arithmetic)
3473 static complex_value complex_deref_address(dbg_info *const dbgi,
3474 type_t *type, ir_node *const addr,
3475 ir_cons_flags flags)
3477 type = skip_typeref(type);
3478 assert(is_type_complex(type));
3480 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3481 flags |= cons_volatile;
3482 ir_mode *const mode = get_complex_mode_storage(type);
3483 ir_node *const memory = get_store();
3484 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
3485 ir_node *const load_mem = new_Proj(load, mode_M, pn_Load_M);
3486 ir_node *const load_res = new_Proj(load, mode, pn_Load_res);
3488 ir_type *const irtype = get_ir_type(type);
3489 ir_mode *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3490 ir_node *const in[1] = { new_Const(get_mode_one(mode_uint)) };
3491 ir_entity *const entity = get_array_element_entity(irtype);
3492 ir_node *const nomem = get_irg_no_mem(current_ir_graph);
3493 ir_node *const addr2 = new_Sel(nomem, addr, 1, in, entity);
3494 ir_node *const load2 = new_d_Load(dbgi, load_mem, addr2, mode, flags);
3495 ir_node *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3496 ir_node *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3497 set_store(load_mem2);
3499 return (complex_value) { load_res, load_res2 };
3502 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3504 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
3505 entity_t *const entity = ref->entity;
3506 assert(is_declaration(entity));
3508 switch ((declaration_kind_t)entity->declaration.kind) {
3509 case DECLARATION_KIND_LOCAL_VARIABLE:
3510 case DECLARATION_KIND_PARAMETER:
3511 return read_localvar_complex(dbgi, entity);
3513 ir_node *const addr = reference_addr(ref);
3514 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3519 static complex_value complex_select_to_firm(const select_expression_t *select)
3521 dbg_info *const dbgi = get_dbg_info(&select->base.pos);
3522 ir_node *const addr = select_addr(select);
3523 type_t *const type = skip_typeref(select->base.type);
3524 return complex_deref_address(dbgi, type, addr, cons_none);
3527 static complex_value complex_array_access_to_firm(
3528 const array_access_expression_t *expression)
3530 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3531 ir_node *addr = array_access_addr(expression);
3532 type_t *type = skip_typeref(expression->base.type);
3533 assert(is_type_complex(type));
3534 return complex_deref_address(dbgi, type, addr, cons_none);
3537 static complex_value get_complex_from_lvalue(const expression_t *expression,
3540 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3542 if (expression->kind == EXPR_REFERENCE) {
3543 const reference_expression_t *ref = &expression->reference;
3545 entity_t *entity = ref->entity;
3546 assert(entity->kind == ENTITY_VARIABLE
3547 || entity->kind == ENTITY_PARAMETER);
3548 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3549 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3550 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3551 return read_localvar_complex(dbgi, entity);
3555 assert(addr != NULL);
3556 return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3559 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3561 const expression_t *const value = expression->value;
3562 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3563 type_t *const from_type = skip_typeref(value->base.type);
3564 type_t *const to_type = skip_typeref(expression->base.type);
3565 ir_mode *const mode = get_complex_mode_storage(to_type);
3567 if (is_type_complex(from_type)) {
3568 complex_value cvalue = expression_to_complex(value);
3569 return complex_conv(dbgi, cvalue, mode);
3571 ir_node *const value_node = expression_to_value(value);
3572 ir_node *const zero = new_Const(get_mode_null(mode));
3573 ir_node *const casted = create_conv(dbgi, value_node, mode);
3574 return (complex_value) { casted, zero };
3578 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3580 type_t *type = skip_typeref(literal->base.type);
3581 ir_mode *mode = get_complex_mode_storage(type);
3582 ir_node *litvalue = literal_to_firm_(literal, mode);
3583 ir_node *zero = new_Const(get_mode_null(mode));
3584 return (complex_value) { zero, litvalue };
3587 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3588 complex_value right, ir_mode *mode);
3590 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3591 complex_value right, ir_mode *mode)
3593 return (complex_value) {
3594 new_d_Add(dbgi, left.real, right.real, mode),
3595 new_d_Add(dbgi, left.imag, right.imag, mode)
3599 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3600 complex_value right, ir_mode *mode)
3602 return (complex_value) {
3603 new_d_Sub(dbgi, left.real, right.real, mode),
3604 new_d_Sub(dbgi, left.imag, right.imag, mode)
3608 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3609 complex_value right, ir_mode *mode)
3611 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3612 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3613 ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3614 ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3615 return (complex_value) {
3616 new_d_Sub(dbgi, op1, op2, mode),
3617 new_d_Add(dbgi, op3, op4, mode)
3621 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3622 complex_value right, ir_mode *mode)
3624 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3625 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3626 ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3627 ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3628 ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3629 ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3630 ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3631 ir_node *const real_divisor = new_d_Add(dbgi, op5, op6, mode);
3632 ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3633 ir_node *const imag_divisor = new_d_Add(dbgi, op5, op6, mode);
3634 return (complex_value) {
3635 create_div(dbgi, real_dividend, real_divisor, mode),
3636 create_div(dbgi, imag_dividend, imag_divisor, mode)
3640 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3643 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3646 ir_node *one = new_Const(get_mode_one(mode));
3647 return (complex_value) {
3648 new_d_Add(dbgi, value.real, one, mode),
3653 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3656 ir_node *one = new_Const(get_mode_one(mode));
3657 return (complex_value) {
3658 new_d_Sub(dbgi, value.real, one, mode),
3663 static void set_complex_value_for_expression(dbg_info *dbgi,
3664 const expression_t *expression,
3665 complex_value value,
3668 type_t *const type = skip_typeref(expression->base.type);
3669 ir_mode *const mode = get_complex_mode_storage(type);
3670 ir_node *const real = create_conv(dbgi, value.real, mode);
3671 ir_node *const imag = create_conv(dbgi, value.imag, mode);
3673 if (expression->kind == EXPR_REFERENCE) {
3674 const reference_expression_t *ref = &expression->reference;
3676 entity_t *entity = ref->entity;
3677 assert(is_declaration(entity));
3678 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3679 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3680 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3681 set_value(entity->variable.v.value_number, real);
3682 set_value(entity->variable.v.value_number+1, imag);
3688 addr = expression_to_addr(expression);
3689 assert(addr != NULL);
3690 store_complex(dbgi, addr, type, value);
3693 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3694 new_complex_unop constructor,
3697 dbg_info *const dbgi = get_dbg_info(&unop->base.pos);
3698 const expression_t *value_expr = unop->value;
3699 ir_node *addr = expression_to_addr(value_expr);
3700 complex_value value = get_complex_from_lvalue(value_expr, addr);
3701 type_t *type = skip_typeref(unop->base.type);
3702 ir_mode *mode = get_complex_mode_arithmetic(type);
3703 value = complex_conv(dbgi, value, mode);
3704 complex_value new_value = constructor(dbgi, value, mode);
3705 set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3706 return return_old ? value : new_value;
3709 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3711 complex_value cvalue = expression_to_complex(expr->value);
3712 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3713 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3714 cvalue = complex_conv(dbgi, cvalue, mode);
3715 return (complex_value) {
3716 new_d_Minus(dbgi, cvalue.real, mode),
3717 new_d_Minus(dbgi, cvalue.imag, mode)
3721 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3723 complex_value cvalue = expression_to_complex(expr->value);
3724 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3725 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3726 cvalue = complex_conv(dbgi, cvalue, mode);
3727 return (complex_value) {
3729 new_d_Minus(dbgi, cvalue.imag, mode)
3733 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3734 new_complex_binop constructor)
3736 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3737 ir_mode *mode = get_complex_mode_arithmetic(binexpr->base.type);
3738 complex_value left = expression_to_complex(binexpr->left);
3739 complex_value right = expression_to_complex(binexpr->right);
3740 left = complex_conv(dbgi, left, mode);
3741 right = complex_conv(dbgi, right, mode);
3742 return constructor(dbgi, left, right, mode);
3745 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3746 new_complex_binop constructor)
3748 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3749 expression_t *lefte = binexpr->left;
3750 expression_t *righte = binexpr->right;
3751 ir_mode *mode = get_complex_mode_arithmetic(righte->base.type);
3752 ir_node *addr = expression_to_addr(lefte);
3753 complex_value left = get_complex_from_lvalue(lefte, addr);
3754 complex_value right = expression_to_complex(righte);
3755 left = complex_conv(dbgi, left, mode);
3756 right = complex_conv(dbgi, right, mode);
3757 complex_value new_value = constructor(dbgi, left, right, mode);
3758 type_t *res_type = skip_typeref(binexpr->base.type);
3759 set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3760 return complex_conv_to_storage(dbgi, new_value, res_type);
3763 static complex_value complex_call_to_firm(const call_expression_t *call)
3765 ir_node *result = call_expression_to_firm(call);
3766 expression_t *function = call->function;
3767 type_t *type = skip_typeref(function->base.type);
3768 assert(is_type_pointer(type));
3769 pointer_type_t *pointer_type = &type->pointer;
3770 type_t *points_to = skip_typeref(pointer_type->points_to);
3771 assert(is_type_function(points_to));
3772 function_type_t *function_type = &points_to->function;
3773 type_t *return_type = skip_typeref(function_type->return_type);
3774 assert(is_type_complex(return_type));
3775 dbg_info *dbgi = get_dbg_info(&call->base.pos);
3776 return complex_deref_address(dbgi, return_type, result, cons_floats);
3779 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3780 jump_target *const true_target, jump_target *const false_target,
3781 ir_relation relation)
3783 jump_target extra_target;
3784 init_jump_target(&extra_target, NULL);
3786 complex_value left = expression_to_complex(binexpr->left);
3787 complex_value right = expression_to_complex(binexpr->right);
3788 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3789 ir_mode *mode = get_complex_mode_arithmetic(binexpr->left->base.type);
3790 left = complex_conv(dbgi, left, mode);
3791 right = complex_conv(dbgi, right, mode);
3793 ir_node *cmp_real = new_d_Cmp(dbgi, left.real, right.real, relation);
3794 ir_node *cond = new_d_Cond(dbgi, cmp_real);
3795 ir_node *true_proj = new_Proj(cond, mode_X, pn_Cond_true);
3796 ir_node *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3797 add_pred_to_jump_target(&extra_target, true_proj);
3798 add_pred_to_jump_target(false_target, false_proj);
3799 if (!enter_jump_target(&extra_target))
3802 ir_node *cmp_imag = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3803 ir_node *condi = new_d_Cond(dbgi, cmp_imag);
3804 ir_node *true_proj_i = new_Proj(condi, mode_X, pn_Cond_true);
3805 ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3806 add_pred_to_jump_target(true_target, true_proj_i);
3807 add_pred_to_jump_target(false_target, false_proj_i);
3808 set_unreachable_now();
3811 static complex_value complex_to_control_flow(
3812 const expression_t *const expression, jump_target *const true_target,
3813 jump_target *const false_target)
3815 jump_target extra_target;
3816 init_jump_target(&extra_target, NULL);
3817 complex_value value = expression_to_complex(expression);
3818 if (is_Const(value.real) && is_Const(value.imag)) {
3819 ir_tarval *tv_real = get_Const_tarval(value.real);
3820 ir_tarval *tv_imag = get_Const_tarval(value.imag);
3821 if (tarval_is_null(tv_real) && tarval_is_null(tv_imag)) {
3822 jump_to_target(false_target);
3824 jump_to_target(true_target);
3826 set_unreachable_now();
3830 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3831 type_t *const type = expression->base.type;
3832 ir_mode *const mode = get_complex_mode_arithmetic(type);
3833 value = complex_conv(dbgi, value, mode);
3834 ir_node *const zero = new_Const(get_mode_null(mode));
3835 ir_node *const cmp_real =
3836 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3837 ir_node *const cond_real = new_d_Cond(dbgi, cmp_real);
3838 ir_node *const true_real = new_Proj(cond_real, mode_X, pn_Cond_true);
3839 ir_node *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3840 add_pred_to_jump_target(true_target, true_real);
3841 add_pred_to_jump_target(&extra_target, false_real);
3842 if (!enter_jump_target(&extra_target))
3845 ir_node *const cmp_imag =
3846 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3847 ir_node *const cond_imag = new_d_Cond(dbgi, cmp_imag);
3848 ir_node *const true_imag = new_Proj(cond_imag, mode_X, pn_Cond_true);
3849 ir_node *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3850 add_pred_to_jump_target(true_target, true_imag);
3851 add_pred_to_jump_target(false_target, false_imag);
3852 set_unreachable_now();
3857 static complex_value complex_conditional_to_firm(
3858 const conditional_expression_t *const expression)
3860 jump_target true_target;
3861 jump_target false_target;
3862 init_jump_target(&true_target, NULL);
3863 init_jump_target(&false_target, NULL);
3864 complex_value cond_val;
3865 memset(&cond_val, 0, sizeof(cond_val));
3866 if (expression->true_expression == NULL) {
3867 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3868 cond_val = complex_to_control_flow(expression->condition,
3869 &true_target, &false_target);
3871 expression_to_control_flow(expression->condition, &true_target, &false_target);
3875 memset(&val, 0, sizeof(val));
3876 jump_target exit_target;
3877 init_jump_target(&exit_target, NULL);
3878 type_t *const type = skip_typeref(expression->base.type);
3879 ir_mode *const mode = get_complex_mode_arithmetic(type);
3880 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3882 if (enter_jump_target(&true_target)) {
3883 if (expression->true_expression) {
3884 val = expression_to_complex(expression->true_expression);
3886 assert(cond_val.real != NULL);
3889 val = complex_conv(dbgi, val, mode);
3890 jump_to_target(&exit_target);
3893 if (enter_jump_target(&false_target)) {
3894 complex_value false_val
3895 = expression_to_complex(expression->false_expression);
3896 false_val = complex_conv(dbgi, false_val, mode);
3897 jump_to_target(&exit_target);
3898 if (val.real != NULL) {
3899 ir_node *const inr[] = { val.real, false_val.real };
3900 ir_node *const ini[] = { val.imag, false_val.imag };
3901 ir_node *const block = exit_target.block;
3902 val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3903 val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3909 if (!enter_jump_target(&exit_target)) {
3910 set_cur_block(new_Block(0, NULL));
3911 assert(!is_type_void(type));
3912 val.real = val.imag = new_Bad(mode);
3917 static void create_local_declarations(entity_t*);
3919 static complex_value compound_statement_to_firm_complex(
3920 const compound_statement_t *compound)
3922 create_local_declarations(compound->scope.entities);
3924 complex_value result = { NULL, NULL };
3925 statement_t *statement = compound->statements;
3927 for ( ; statement != NULL; statement = next) {
3928 next = statement->base.next;
3929 /* last statement is the return value */
3931 /* it must be an expression, otherwise we wouldn't be in the
3932 * complex variant of compound_statement_to_firm */
3933 if (statement->kind != STATEMENT_EXPRESSION)
3934 panic("last member of complex statement expression not an expression statement");
3935 expression_t *expression = statement->expression.expression;
3936 assert(is_type_complex(skip_typeref(expression->base.type)));
3937 result = expression_to_complex(expression);
3939 statement_to_firm(statement);
3946 static complex_value complex_assign_to_firm(const binary_expression_t *expr)
3948 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3949 complex_value const value = expression_to_complex(expr->right);
3950 ir_node *const addr = expression_to_addr(expr->left);
3951 set_complex_value_for_expression(dbgi, expr->left, value, addr);
3955 static complex_value complex_statement_expression_to_firm(
3956 const statement_expression_t *const expr)
3958 const statement_t *const statement = expr->statement;
3959 assert(statement->kind == STATEMENT_COMPOUND);
3961 return compound_statement_to_firm_complex(&statement->compound);
3964 static complex_value expression_to_complex(const expression_t *expression)
3966 switch (expression->kind) {
3967 case EXPR_REFERENCE:
3968 return complex_reference_to_firm(&expression->reference);
3970 return complex_select_to_firm(&expression->select);
3971 case EXPR_ARRAY_ACCESS:
3972 return complex_array_access_to_firm(&expression->array_access);
3973 case EXPR_UNARY_CAST:
3974 return complex_cast_to_firm(&expression->unary);
3975 case EXPR_BINARY_COMMA:
3976 evaluate_expression_discard_result(expression->binary.left);
3977 return expression_to_complex(expression->binary.right);
3978 case EXPR_BINARY_ADD:
3979 return create_complex_binop(&expression->binary, new_complex_add);
3980 case EXPR_BINARY_ADD_ASSIGN:
3981 return create_complex_assign_binop(&expression->binary, new_complex_add);
3982 case EXPR_BINARY_SUB:
3983 return create_complex_binop(&expression->binary, new_complex_sub);
3984 case EXPR_BINARY_SUB_ASSIGN:
3985 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3986 case EXPR_BINARY_MUL:
3987 return create_complex_binop(&expression->binary, new_complex_mul);
3988 case EXPR_BINARY_MUL_ASSIGN:
3989 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3990 case EXPR_BINARY_DIV:
3991 return create_complex_binop(&expression->binary, new_complex_div);
3992 case EXPR_BINARY_DIV_ASSIGN:
3993 return create_complex_assign_binop(&expression->binary, new_complex_div);
3994 case EXPR_UNARY_PLUS:
3995 return expression_to_complex(expression->unary.value);
3996 case EXPR_UNARY_PREFIX_INCREMENT:
3997 return create_complex_assign_unop(&expression->unary,
3998 new_complex_increment, false);
3999 case EXPR_UNARY_PREFIX_DECREMENT:
4000 return create_complex_assign_unop(&expression->unary,
4001 new_complex_decrement, false);
4002 case EXPR_UNARY_POSTFIX_INCREMENT:
4003 return create_complex_assign_unop(&expression->unary,
4004 new_complex_increment, true);
4005 case EXPR_UNARY_POSTFIX_DECREMENT:
4006 return create_complex_assign_unop(&expression->unary,
4007 new_complex_decrement, true);
4008 case EXPR_UNARY_NEGATE:
4009 return complex_negate_to_firm(&expression->unary);
4010 case EXPR_UNARY_COMPLEMENT:
4011 return complex_complement_to_firm(&expression->unary);
4012 case EXPR_BINARY_ASSIGN:
4013 return complex_assign_to_firm(&expression->binary);
4014 case EXPR_LITERAL_CASES:
4015 return complex_literal_to_firm(&expression->literal);
4017 return complex_call_to_firm(&expression->call);
4018 case EXPR_CONDITIONAL:
4019 return complex_conditional_to_firm(&expression->conditional);
4020 case EXPR_STATEMENT:
4021 return complex_statement_expression_to_firm(&expression->statement);
4023 panic("unexpected complex expression");
4029 static void create_variable_entity(entity_t *variable,
4030 declaration_kind_t declaration_kind,
4031 ir_type *parent_type)
4033 assert(variable->kind == ENTITY_VARIABLE);
4034 type_t *type = skip_typeref(variable->declaration.type);
4036 ident *const id = new_id_from_str(variable->base.symbol->string);
4037 ir_type *const irtype = get_ir_type(type);
4038 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
4039 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
4040 unsigned alignment = variable->declaration.alignment;
4042 set_entity_alignment(irentity, alignment);
4044 handle_decl_modifiers(irentity, variable);
4046 variable->declaration.kind = (unsigned char) declaration_kind;
4047 variable->variable.v.entity = irentity;
4048 set_entity_ld_ident(irentity, create_ld_ident(variable));
4050 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4051 set_entity_volatility(irentity, volatility_is_volatile);
4056 typedef struct type_path_entry_t type_path_entry_t;
4057 struct type_path_entry_t {
4059 ir_initializer_t *initializer;
4061 entity_t *compound_entry;
4064 typedef struct type_path_t type_path_t;
4065 struct type_path_t {
4066 type_path_entry_t *path;
4071 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
4073 size_t len = ARR_LEN(path->path);
4075 for (size_t i = 0; i < len; ++i) {
4076 const type_path_entry_t *entry = & path->path[i];
4078 type_t *type = skip_typeref(entry->type);
4079 if (is_type_compound(type)) {
4080 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
4081 } else if (is_type_array(type)) {
4082 fprintf(stderr, "[%u]", (unsigned) entry->index);
4084 fprintf(stderr, "-INVALID-");
4087 fprintf(stderr, " (");
4088 print_type(path->top_type);
4089 fprintf(stderr, ")");
4092 static type_path_entry_t *get_type_path_top(const type_path_t *path)
4094 size_t len = ARR_LEN(path->path);
4096 return & path->path[len-1];
4099 static type_path_entry_t *append_to_type_path(type_path_t *path)
4101 size_t len = ARR_LEN(path->path);
4102 ARR_RESIZE(type_path_entry_t, path->path, len+1);
4104 type_path_entry_t *result = & path->path[len];
4105 memset(result, 0, sizeof(result[0]));
4109 static size_t get_compound_member_count(const compound_type_t *type)
4111 compound_t *compound = type->compound;
4112 size_t n_members = 0;
4113 entity_t *member = compound->members.entities;
4114 for ( ; member != NULL; member = member->base.next) {
4121 static ir_initializer_t *get_initializer_entry(type_path_t *path)
4123 type_t *orig_top_type = path->top_type;
4124 type_t *top_type = skip_typeref(orig_top_type);
4126 assert(is_type_compound(top_type) || is_type_array(top_type));
4128 if (ARR_LEN(path->path) == 0) {
4131 type_path_entry_t *top = get_type_path_top(path);
4132 ir_initializer_t *initializer = top->initializer;
4133 return get_initializer_compound_value(initializer, top->index);
4137 static void descend_into_subtype(type_path_t *path)
4139 type_t *orig_top_type = path->top_type;
4140 type_t *top_type = skip_typeref(orig_top_type);
4142 assert(is_type_compound(top_type) || is_type_array(top_type));
4144 ir_initializer_t *initializer = get_initializer_entry(path);
4146 type_path_entry_t *top = append_to_type_path(path);
4147 top->type = top_type;
4151 if (is_type_compound(top_type)) {
4152 compound_t *const compound = top_type->compound.compound;
4153 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
4155 top->compound_entry = entry;
4157 len = get_compound_member_count(&top_type->compound);
4158 if (entry != NULL) {
4159 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4160 path->top_type = entry->declaration.type;
4163 assert(is_type_array(top_type));
4164 assert(top_type->array.size > 0);
4167 path->top_type = top_type->array.element_type;
4168 len = top_type->array.size;
4170 if (initializer == NULL
4171 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
4172 initializer = create_initializer_compound(len);
4173 /* we have to set the entry at the 2nd latest path entry... */
4174 size_t path_len = ARR_LEN(path->path);
4175 assert(path_len >= 1);
4177 type_path_entry_t *entry = & path->path[path_len-2];
4178 ir_initializer_t *tinitializer = entry->initializer;
4179 set_initializer_compound_value(tinitializer, entry->index,
4183 top->initializer = initializer;
4186 static void ascend_from_subtype(type_path_t *path)
4188 type_path_entry_t *top = get_type_path_top(path);
4190 path->top_type = top->type;
4192 size_t len = ARR_LEN(path->path);
4193 ARR_RESIZE(type_path_entry_t, path->path, len-1);
4196 static void walk_designator(type_path_t *path, const designator_t *designator)
4198 /* designators start at current object type */
4199 ARR_RESIZE(type_path_entry_t, path->path, 1);
4201 for ( ; designator != NULL; designator = designator->next) {
4202 type_path_entry_t *top = get_type_path_top(path);
4203 type_t *orig_type = top->type;
4204 type_t *type = skip_typeref(orig_type);
4206 if (designator->symbol != NULL) {
4207 assert(is_type_compound(type));
4209 symbol_t *symbol = designator->symbol;
4211 compound_t *compound = type->compound.compound;
4212 entity_t *iter = compound->members.entities;
4213 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
4214 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
4216 /* revert previous initialisations of other union elements */
4217 if (type->kind == TYPE_COMPOUND_UNION) {
4218 ir_initializer_t *initializer = top->initializer;
4219 if (initializer != NULL
4220 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
4221 /* are we writing to a new element? */
4222 ir_initializer_t *oldi
4223 = get_initializer_compound_value(initializer, index);
4224 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
4225 /* clear initializer */
4227 = get_initializer_compound_n_entries(initializer);
4228 ir_initializer_t *nulli = get_initializer_null();
4229 for (size_t i = 0; i < len; ++i) {
4230 set_initializer_compound_value(initializer, i,
4237 top->type = orig_type;
4238 top->compound_entry = iter;
4240 orig_type = iter->declaration.type;
4242 expression_t *array_index = designator->array_index;
4243 assert(is_type_array(type));
4245 long index = fold_constant_to_int(array_index);
4246 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
4248 top->type = orig_type;
4249 top->index = (size_t) index;
4250 orig_type = type->array.element_type;
4252 path->top_type = orig_type;
4254 if (designator->next != NULL) {
4255 descend_into_subtype(path);
4259 path->invalid = false;
4262 static void advance_current_object(type_path_t *path)
4264 if (path->invalid) {
4265 /* TODO: handle this... */
4266 panic("invalid initializer (excessive elements)");
4269 type_path_entry_t *top = get_type_path_top(path);
4271 type_t *type = skip_typeref(top->type);
4272 if (is_type_union(type)) {
4273 /* only the first element is initialized in unions */
4274 top->compound_entry = NULL;
4275 } else if (is_type_struct(type)) {
4276 entity_t *entry = top->compound_entry;
4279 entry = skip_unnamed_bitfields(entry->base.next);
4280 top->compound_entry = entry;
4281 if (entry != NULL) {
4282 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4283 path->top_type = entry->declaration.type;
4287 assert(is_type_array(type));
4290 if (!type->array.size_constant || top->index < type->array.size) {
4295 /* we're past the last member of the current sub-aggregate, try if we
4296 * can ascend in the type hierarchy and continue with another subobject */
4297 size_t len = ARR_LEN(path->path);
4300 ascend_from_subtype(path);
4301 advance_current_object(path);
4303 path->invalid = true;
4308 static ir_initializer_t *create_ir_initializer_value(
4309 const initializer_value_t *initializer)
4311 expression_t *expr = initializer->value;
4312 type_t *type = skip_typeref(expr->base.type);
4314 if (is_type_compound(type)) {
4315 if (expr->kind == EXPR_UNARY_CAST) {
4316 expr = expr->unary.value;
4317 type = skip_typeref(expr->base.type);
4319 /* must be a compound literal... */
4320 if (expr->kind == EXPR_COMPOUND_LITERAL) {
4321 return create_ir_initializer(expr->compound_literal.initializer,
4324 } else if (is_type_complex(type)) {
4325 complex_value const value = expression_to_complex(expr);
4326 ir_mode *const mode = get_complex_mode_storage(type);
4327 ir_node *const real = create_conv(NULL, value.real, mode);
4328 ir_node *const imag = create_conv(NULL, value.imag, mode);
4329 ir_initializer_t *const res = create_initializer_compound(2);
4330 ir_initializer_t *const init_real = create_initializer_const(real);
4331 ir_initializer_t *const init_imag = create_initializer_const(imag);
4332 set_initializer_compound_value(res, 0, init_real);
4333 set_initializer_compound_value(res, 1, init_imag);
4337 ir_node *value = expression_to_value(expr);
4338 value = conv_to_storage_type(NULL, value, type);
4339 return create_initializer_const(value);
4342 /** Tests whether type can be initialized by a string constant */
4343 static bool is_string_type(type_t *type)
4345 if (!is_type_array(type))
4348 type_t *const inner = skip_typeref(type->array.element_type);
4349 return is_type_integer(inner);
4352 static ir_initializer_t *create_ir_initializer_list(
4353 const initializer_list_t *initializer, type_t *type)
4356 memset(&path, 0, sizeof(path));
4357 path.top_type = type;
4358 path.path = NEW_ARR_F(type_path_entry_t, 0);
4360 descend_into_subtype(&path);
4362 for (size_t i = 0; i < initializer->len; ++i) {
4363 const initializer_t *sub_initializer = initializer->initializers[i];
4365 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4366 walk_designator(&path, sub_initializer->designator.designator);
4370 if (sub_initializer->kind == INITIALIZER_VALUE) {
4371 const expression_t *expr = sub_initializer->value.value;
4372 const type_t *expr_type = skip_typeref(expr->base.type);
4373 /* we might have to descend into types until the types match */
4375 type_t *orig_top_type = path.top_type;
4376 type_t *top_type = skip_typeref(orig_top_type);
4378 if (types_compatible(top_type, expr_type))
4380 descend_into_subtype(&path);
4382 } else if (sub_initializer->kind == INITIALIZER_STRING) {
4383 /* we might have to descend into types until we're at a scalar
4386 type_t *orig_top_type = path.top_type;
4387 type_t *top_type = skip_typeref(orig_top_type);
4389 if (is_string_type(top_type))
4391 descend_into_subtype(&path);
4395 ir_initializer_t *sub_irinitializer
4396 = create_ir_initializer(sub_initializer, path.top_type);
4398 size_t path_len = ARR_LEN(path.path);
4399 assert(path_len >= 1);
4400 type_path_entry_t *entry = & path.path[path_len-1];
4401 ir_initializer_t *tinitializer = entry->initializer;
4402 set_initializer_compound_value(tinitializer, entry->index,
4405 advance_current_object(&path);
4408 assert(ARR_LEN(path.path) >= 1);
4409 ir_initializer_t *result = path.path[0].initializer;
4410 DEL_ARR_F(path.path);
4415 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
4417 type = skip_typeref(type);
4419 assert(type->kind == TYPE_ARRAY);
4420 assert(type->array.size_constant);
4421 string_literal_expression_t const *const str = get_init_string(init);
4422 size_t const str_len = str->value.size;
4423 size_t const arr_len = type->array.size;
4424 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
4425 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
4426 char const * p = str->value.begin;
4427 switch (str->value.encoding) {
4428 case STRING_ENCODING_CHAR:
4429 case STRING_ENCODING_UTF8:
4430 for (size_t i = 0; i != arr_len; ++i) {
4431 char const c = i < str_len ? *p++ : 0;
4432 ir_tarval *const tv = new_tarval_from_long(c, mode);
4433 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4434 set_initializer_compound_value(irinit, i, tvinit);
4438 case STRING_ENCODING_CHAR16:
4439 case STRING_ENCODING_CHAR32:
4440 case STRING_ENCODING_WIDE:
4441 for (size_t i = 0; i != arr_len; ++i) {
4442 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
4443 ir_tarval *const tv = new_tarval_from_long(c, mode);
4444 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4445 set_initializer_compound_value(irinit, i, tvinit);
4453 static ir_initializer_t *create_ir_initializer(
4454 const initializer_t *initializer, type_t *type)
4456 switch (initializer->kind) {
4457 case INITIALIZER_STRING:
4458 return create_ir_initializer_string(initializer, type);
4460 case INITIALIZER_LIST:
4461 return create_ir_initializer_list(&initializer->list, type);
4463 case INITIALIZER_VALUE:
4464 return create_ir_initializer_value(&initializer->value);
4466 case INITIALIZER_DESIGNATOR:
4467 panic("unexpected designator initializer");
4469 panic("unknown initializer");
4472 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4473 * are elements [...] the remainder of the aggregate shall be initialized
4474 * implicitly the same as objects that have static storage duration. */
4475 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4478 /* for unions we must NOT do anything for null initializers */
4479 ir_type *owner = get_entity_owner(entity);
4480 if (is_Union_type(owner)) {
4484 ir_type *ent_type = get_entity_type(entity);
4485 /* create sub-initializers for a compound type */
4486 if (is_compound_type(ent_type)) {
4487 unsigned n_members = get_compound_n_members(ent_type);
4488 for (unsigned n = 0; n < n_members; ++n) {
4489 ir_entity *member = get_compound_member(ent_type, n);
4490 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4492 create_dynamic_null_initializer(member, dbgi, addr);
4496 if (is_Array_type(ent_type)) {
4497 assert(has_array_upper_bound(ent_type, 0));
4498 long n = get_array_upper_bound_int(ent_type, 0);
4499 for (long i = 0; i < n; ++i) {
4500 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4501 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4502 ir_node *cnst = new_d_Const(dbgi, index_tv);
4503 ir_node *in[1] = { cnst };
4504 ir_entity *arrent = get_array_element_entity(ent_type);
4505 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4507 create_dynamic_null_initializer(arrent, dbgi, addr);
4512 ir_mode *value_mode = get_type_mode(ent_type);
4513 ir_node *node = new_Const(get_mode_null(value_mode));
4515 /* is it a bitfield type? */
4516 if (is_Primitive_type(ent_type) &&
4517 get_primitive_base_type(ent_type) != NULL) {
4518 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4522 ir_node *mem = get_store();
4523 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4524 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4528 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4529 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4531 switch (get_initializer_kind(initializer)) {
4532 case IR_INITIALIZER_NULL:
4533 create_dynamic_null_initializer(entity, dbgi, base_addr);
4535 case IR_INITIALIZER_CONST: {
4536 ir_node *node = get_initializer_const_value(initializer);
4537 ir_type *ent_type = get_entity_type(entity);
4539 /* is it a bitfield type? */
4540 if (is_Primitive_type(ent_type) &&
4541 get_primitive_base_type(ent_type) != NULL) {
4542 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4546 ir_node *mem = get_store();
4548 if (is_compound_type(ent_type)) {
4549 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
4550 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4552 assert(get_type_mode(type) == get_irn_mode(node));
4553 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4554 new_mem = new_Proj(store, mode_M, pn_Store_M);
4559 case IR_INITIALIZER_TARVAL: {
4560 ir_tarval *tv = get_initializer_tarval_value(initializer);
4561 ir_node *cnst = new_d_Const(dbgi, tv);
4562 ir_type *ent_type = get_entity_type(entity);
4564 /* is it a bitfield type? */
4565 if (is_Primitive_type(ent_type) &&
4566 get_primitive_base_type(ent_type) != NULL) {
4567 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4571 assert(get_type_mode(type) == get_tarval_mode(tv));
4572 ir_node *mem = get_store();
4573 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4574 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4578 case IR_INITIALIZER_COMPOUND: {
4579 assert(is_compound_type(type) || is_Array_type(type));
4581 if (is_Array_type(type)) {
4582 assert(has_array_upper_bound(type, 0));
4583 n_members = get_array_upper_bound_int(type, 0);
4585 n_members = get_compound_n_members(type);
4588 if (get_initializer_compound_n_entries(initializer)
4589 != (unsigned) n_members)
4590 panic("initializer doesn't match compound type");
4592 for (int i = 0; i < n_members; ++i) {
4595 ir_entity *sub_entity;
4596 if (is_Array_type(type)) {
4597 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4598 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4599 ir_node *cnst = new_d_Const(dbgi, index_tv);
4600 ir_node *in[1] = { cnst };
4601 irtype = get_array_element_type(type);
4602 sub_entity = get_array_element_entity(type);
4603 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4606 sub_entity = get_compound_member(type, i);
4607 irtype = get_entity_type(sub_entity);
4608 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4612 ir_initializer_t *sub_init
4613 = get_initializer_compound_value(initializer, i);
4615 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4622 panic("invalid ir_initializer");
4625 static void create_dynamic_initializer(ir_initializer_t *initializer,
4626 dbg_info *dbgi, ir_entity *entity)
4628 ir_node *frame = get_irg_frame(current_ir_graph);
4629 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4630 ir_type *type = get_entity_type(entity);
4632 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4635 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4636 ir_entity *entity, type_t *type)
4638 ir_node *memory = get_store();
4639 ir_node *nomem = new_NoMem();
4640 ir_node *frame = get_irg_frame(current_ir_graph);
4641 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4643 if (initializer->kind == INITIALIZER_VALUE) {
4644 initializer_value_t *initializer_value = &initializer->value;
4646 ir_node *value = expression_to_value(initializer_value->value);
4647 type = skip_typeref(type);
4648 assign_value(dbgi, addr, type, value);
4652 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4653 ir_initializer_t *irinitializer
4654 = create_ir_initializer(initializer, type);
4656 create_dynamic_initializer(irinitializer, dbgi, entity);
4660 /* create a "template" entity which is copied to the entity on the stack */
4661 ir_entity *const init_entity
4662 = create_initializer_entity(dbgi, initializer, type);
4663 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4664 ir_type *const irtype = get_ir_type(type);
4665 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4667 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4668 set_store(copyb_mem);
4671 static void create_initializer_local_variable_entity(entity_t *entity)
4673 assert(entity->kind == ENTITY_VARIABLE);
4674 initializer_t *initializer = entity->variable.initializer;
4675 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4676 ir_entity *irentity = entity->variable.v.entity;
4677 type_t *type = entity->declaration.type;
4679 create_local_initializer(initializer, dbgi, irentity, type);
4682 static void create_variable_initializer(entity_t *entity)
4684 assert(entity->kind == ENTITY_VARIABLE);
4685 initializer_t *initializer = entity->variable.initializer;
4686 if (initializer == NULL)
4689 declaration_kind_t declaration_kind
4690 = (declaration_kind_t) entity->declaration.kind;
4691 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4692 create_initializer_local_variable_entity(entity);
4696 type_t *type = entity->declaration.type;
4697 type_qualifiers_t tq = get_type_qualifier(type, true);
4699 if (initializer->kind == INITIALIZER_VALUE) {
4700 expression_t * value = initializer->value.value;
4701 type_t *const init_type = skip_typeref(value->base.type);
4703 if (is_type_complex(init_type)) {
4704 complex_value nodes = expression_to_complex(value);
4705 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4706 ir_mode *mode = get_complex_mode_storage(init_type);
4707 ir_node *real = create_conv(dbgi, nodes.real, mode);
4708 ir_node *imag = create_conv(dbgi, nodes.imag, mode);
4709 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4710 set_value(entity->variable.v.value_number, real);
4711 set_value(entity->variable.v.value_number+1, imag);
4713 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4714 ir_entity *irentity = entity->variable.v.entity;
4715 if (tq & TYPE_QUALIFIER_CONST
4716 && get_entity_owner(irentity) != get_tls_type()) {
4717 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4719 ir_initializer_t *initializer = create_initializer_compound(2);
4720 ir_initializer_t *reali = create_initializer_const(real);
4721 set_initializer_compound_value(initializer, 0, reali);
4722 ir_initializer_t *imagi = create_initializer_const(imag);
4723 set_initializer_compound_value(initializer, 1, imagi);
4724 set_entity_initializer(irentity, initializer);
4727 } else if (!is_type_scalar(init_type)) {
4728 if (value->kind != EXPR_COMPOUND_LITERAL)
4729 panic("expected non-scalar initializer to be a compound literal");
4730 initializer = value->compound_literal.initializer;
4731 goto have_initializer;
4734 ir_node * node = expression_to_value(value);
4735 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4736 node = conv_to_storage_type(dbgi, node, init_type);
4738 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4739 set_value(entity->variable.v.value_number, node);
4741 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4743 ir_entity *irentity = entity->variable.v.entity;
4745 if (tq & TYPE_QUALIFIER_CONST
4746 && get_entity_owner(irentity) != get_tls_type()) {
4747 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4749 set_atomic_ent_value(irentity, node);
4753 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4754 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4756 ir_entity *irentity = entity->variable.v.entity;
4757 ir_initializer_t *irinitializer
4758 = create_ir_initializer(initializer, type);
4760 if (tq & TYPE_QUALIFIER_CONST) {
4761 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4763 set_entity_initializer(irentity, irinitializer);
4767 static void create_variable_length_array(entity_t *entity)
4769 assert(entity->kind == ENTITY_VARIABLE);
4770 assert(entity->variable.initializer == NULL);
4772 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4773 entity->variable.v.vla_base = NULL;
4775 /* TODO: record VLA somewhere so we create the free node when we leave
4779 static void allocate_variable_length_array(entity_t *entity)
4781 assert(entity->kind == ENTITY_VARIABLE);
4782 assert(entity->variable.initializer == NULL);
4783 assert(currently_reachable());
4785 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4786 type_t *type = entity->declaration.type;
4787 ir_type *el_type = get_ir_type(type->array.element_type);
4789 /* make sure size_node is calculated */
4790 get_type_size_node(type);
4791 ir_node *elems = type->array.size_node;
4792 ir_node *mem = get_store();
4793 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4795 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4796 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4799 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4800 entity->variable.v.vla_base = addr;
4803 static bool var_needs_entity(variable_t const *const var)
4805 if (var->address_taken)
4807 type_t *const type = skip_typeref(var->base.type);
4808 return (!is_type_scalar(type) && !is_type_complex(type))
4809 || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4813 * Creates a Firm local variable from a declaration.
4815 static void create_local_variable(entity_t *entity)
4817 assert(entity->kind == ENTITY_VARIABLE);
4818 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4820 if (!var_needs_entity(&entity->variable)) {
4821 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4822 entity->variable.v.value_number = next_value_number_function;
4823 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4824 ++next_value_number_function;
4825 if (is_type_complex(skip_typeref(entity->declaration.type)))
4826 ++next_value_number_function;
4830 /* is it a variable length array? */
4831 type_t *const type = skip_typeref(entity->declaration.type);
4832 if (is_type_array(type) && !type->array.size_constant) {
4833 create_variable_length_array(entity);
4837 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4838 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4841 static void create_local_static_variable(entity_t *entity)
4843 assert(entity->kind == ENTITY_VARIABLE);
4844 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4846 type_t *type = skip_typeref(entity->declaration.type);
4847 ir_type *const var_type = entity->variable.thread_local ?
4848 get_tls_type() : get_glob_type();
4849 ir_type *const irtype = get_ir_type(type);
4850 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4852 size_t l = strlen(entity->base.symbol->string);
4853 char buf[l + sizeof(".%u")];
4854 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4855 ident *const id = id_unique(buf);
4856 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4858 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4859 set_entity_volatility(irentity, volatility_is_volatile);
4862 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4863 entity->variable.v.entity = irentity;
4865 set_entity_ld_ident(irentity, id);
4866 set_entity_visibility(irentity, ir_visibility_local);
4868 if (entity->variable.initializer == NULL) {
4869 ir_initializer_t *null_init = get_initializer_null();
4870 set_entity_initializer(irentity, null_init);
4873 PUSH_IRG(get_const_code_irg());
4874 create_variable_initializer(entity);
4878 static ir_node *return_statement_to_firm(return_statement_t *statement)
4880 if (!currently_reachable())
4883 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4884 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4888 if (is_type_void(type)) {
4889 /* just create the side effects, don't return anything */
4890 if (statement->value)
4891 evaluate_expression_discard_result(statement->value);
4894 } else if (is_type_complex(type)) {
4895 if (statement->value) {
4896 complex_value value = expression_to_complex(statement->value);
4897 in[0] = complex_to_memory(dbgi, type, value);
4899 in[0] = new_Unknown(mode_P_data);
4903 ir_mode *const mode = get_ir_mode_storage(type);
4904 if (statement->value) {
4905 ir_node *value = expression_to_value(statement->value);
4906 value = conv_to_storage_type(dbgi, value, type);
4907 in[0] = create_conv(dbgi, value, mode);
4909 in[0] = new_Unknown(mode);
4914 ir_node *const store = get_store();
4915 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4917 ir_node *end_block = get_irg_end_block(current_ir_graph);
4918 add_immBlock_pred(end_block, ret);
4920 set_unreachable_now();
4924 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4926 if (!currently_reachable())
4929 expression_t *expression = statement->expression;
4930 type_t *type = skip_typeref(expression->base.type);
4931 if (is_type_complex(type)) {
4932 expression_to_complex(expression);
4935 return expression_to_value(statement->expression);
4939 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4941 create_local_declarations(compound->scope.entities);
4943 ir_node *result = NULL;
4944 statement_t *statement = compound->statements;
4945 for ( ; statement != NULL; statement = statement->base.next) {
4946 result = statement_to_firm(statement);
4952 static void create_global_variable(entity_t *entity)
4954 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4955 ir_visibility visibility = ir_visibility_external;
4956 storage_class_tag_t storage
4957 = (storage_class_tag_t)entity->declaration.storage_class;
4958 decl_modifiers_t modifiers = entity->declaration.modifiers;
4959 assert(entity->kind == ENTITY_VARIABLE);
4962 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4963 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4964 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4965 case STORAGE_CLASS_TYPEDEF:
4966 case STORAGE_CLASS_AUTO:
4967 case STORAGE_CLASS_REGISTER:
4968 panic("invalid storage class for global var");
4971 /* "common" symbols */
4972 if (storage == STORAGE_CLASS_NONE
4973 && entity->variable.initializer == NULL
4974 && !entity->variable.thread_local
4975 && (modifiers & DM_WEAK) == 0) {
4976 linkage |= IR_LINKAGE_MERGE;
4979 ir_type *var_type = get_glob_type();
4980 if (entity->variable.thread_local) {
4981 var_type = get_tls_type();
4983 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4984 ir_entity *irentity = entity->variable.v.entity;
4985 add_entity_linkage(irentity, linkage);
4986 set_entity_visibility(irentity, visibility);
4987 if (entity->variable.initializer == NULL
4988 && storage != STORAGE_CLASS_EXTERN) {
4989 ir_initializer_t *null_init = get_initializer_null();
4990 set_entity_initializer(irentity, null_init);
4994 static void create_local_declaration(entity_t *entity)
4996 assert(is_declaration(entity));
4998 /* construct type */
4999 (void) get_ir_type(entity->declaration.type);
5000 if (entity->base.symbol == NULL) {
5004 switch ((storage_class_tag_t) entity->declaration.storage_class) {
5005 case STORAGE_CLASS_STATIC:
5006 if (entity->kind == ENTITY_FUNCTION) {
5007 (void)get_function_entity(entity, NULL);
5009 create_local_static_variable(entity);
5012 case STORAGE_CLASS_EXTERN:
5013 if (entity->kind == ENTITY_FUNCTION) {
5014 assert(entity->function.body == NULL);
5015 (void)get_function_entity(entity, NULL);
5017 create_global_variable(entity);
5018 create_variable_initializer(entity);
5021 case STORAGE_CLASS_NONE:
5022 case STORAGE_CLASS_AUTO:
5023 case STORAGE_CLASS_REGISTER:
5024 if (entity->kind == ENTITY_FUNCTION) {
5025 if (entity->function.body != NULL) {
5026 ir_type *owner = get_irg_frame_type(current_ir_graph);
5027 (void)get_function_entity(entity, owner);
5028 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5029 enqueue_inner_function(entity);
5031 (void)get_function_entity(entity, NULL);
5034 create_local_variable(entity);
5037 case STORAGE_CLASS_TYPEDEF:
5040 panic("invalid storage class");
5043 static void create_local_declarations(entity_t *e)
5045 for (; e; e = e->base.next) {
5046 if (is_declaration(e))
5047 create_local_declaration(e);
5051 static void initialize_local_declaration(entity_t *entity)
5053 if (entity->base.symbol == NULL)
5056 // no need to emit code in dead blocks
5057 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5058 && !currently_reachable())
5061 switch ((declaration_kind_t) entity->declaration.kind) {
5062 case DECLARATION_KIND_LOCAL_VARIABLE:
5063 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5064 create_variable_initializer(entity);
5067 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5068 allocate_variable_length_array(entity);
5071 case DECLARATION_KIND_COMPOUND_MEMBER:
5072 case DECLARATION_KIND_GLOBAL_VARIABLE:
5073 case DECLARATION_KIND_FUNCTION:
5074 case DECLARATION_KIND_INNER_FUNCTION:
5077 case DECLARATION_KIND_PARAMETER:
5078 case DECLARATION_KIND_PARAMETER_ENTITY:
5079 panic("can't initialize parameters");
5081 case DECLARATION_KIND_UNKNOWN:
5082 panic("can't initialize unknown declaration");
5084 panic("invalid declaration kind");
5087 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5089 entity_t *entity = statement->declarations_begin;
5093 entity_t *const last = statement->declarations_end;
5094 for ( ;; entity = entity->base.next) {
5095 if (is_declaration(entity)) {
5096 initialize_local_declaration(entity);
5097 } else if (entity->kind == ENTITY_TYPEDEF) {
5098 /* ยง6.7.7:3 Any array size expressions associated with variable length
5099 * array declarators are evaluated each time the declaration of the
5100 * typedef name is reached in the order of execution. */
5101 type_t *const type = skip_typeref(entity->typedefe.type);
5102 if (is_type_array(type) && type->array.is_vla)
5103 get_vla_size(&type->array);
5112 static ir_node *if_statement_to_firm(if_statement_t *statement)
5114 create_local_declarations(statement->scope.entities);
5116 /* Create the condition. */
5117 jump_target true_target;
5118 jump_target false_target;
5119 init_jump_target(&true_target, NULL);
5120 init_jump_target(&false_target, NULL);
5121 if (currently_reachable())
5122 expression_to_control_flow(statement->condition, &true_target, &false_target);
5124 jump_target exit_target;
5125 init_jump_target(&exit_target, NULL);
5127 /* Create the true statement. */
5128 enter_jump_target(&true_target);
5129 statement_to_firm(statement->true_statement);
5130 jump_to_target(&exit_target);
5132 /* Create the false statement. */
5133 enter_jump_target(&false_target);
5134 if (statement->false_statement)
5135 statement_to_firm(statement->false_statement);
5136 jump_to_target(&exit_target);
5138 enter_jump_target(&exit_target);
5142 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5144 create_local_declarations(statement->scope.entities);
5147 PUSH_CONTINUE(NULL);
5149 expression_t *const cond = statement->condition;
5150 /* Avoid an explicit body block in case of do ... while (0);. */
5151 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
5152 /* do ... while (0);. */
5153 statement_to_firm(statement->body);
5154 jump_to_target(&continue_target);
5155 enter_jump_target(&continue_target);
5156 jump_to_target(&break_target);
5158 jump_target body_target;
5159 init_jump_target(&body_target, NULL);
5160 jump_to_target(&body_target);
5161 enter_immature_jump_target(&body_target);
5163 statement_to_firm(statement->body);
5164 jump_to_target(&continue_target);
5165 if (enter_jump_target(&continue_target))
5166 expression_to_control_flow(statement->condition, &body_target, &break_target);
5167 enter_jump_target(&body_target);
5169 enter_jump_target(&break_target);
5176 static ir_node *for_statement_to_firm(for_statement_t *statement)
5178 create_local_declarations(statement->scope.entities);
5180 if (currently_reachable()) {
5181 entity_t *entity = statement->scope.entities;
5182 for ( ; entity != NULL; entity = entity->base.next) {
5183 if (!is_declaration(entity))
5186 initialize_local_declaration(entity);
5189 if (statement->initialisation != NULL) {
5190 expression_to_value(statement->initialisation);
5194 /* Create the header block */
5195 jump_target header_target;
5196 init_jump_target(&header_target, NULL);
5197 jump_to_target(&header_target);
5198 enter_immature_jump_target(&header_target);
5201 expression_t *const step = statement->step;
5203 PUSH_CONTINUE(step ? NULL : header_target.block);
5205 /* Create the condition. */
5206 expression_t *const cond = statement->condition;
5207 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
5208 jump_target body_target;
5209 init_jump_target(&body_target, NULL);
5210 expression_to_control_flow(cond, &body_target, &break_target);
5211 enter_jump_target(&body_target);
5214 /* Create the loop body. */
5215 statement_to_firm(statement->body);
5216 jump_to_target(&continue_target);
5218 /* Create the step code. */
5219 if (step && enter_jump_target(&continue_target)) {
5220 expression_to_value(step);
5221 jump_to_target(&header_target);
5224 enter_jump_target(&header_target);
5225 enter_jump_target(&break_target);
5232 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5234 /* determine number of cases */
5236 for (case_label_statement_t *l = statement->first_case; l != NULL;
5239 if (l->expression == NULL)
5241 if (l->is_empty_range)
5246 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5248 for (case_label_statement_t *l = statement->first_case; l != NULL;
5250 if (l->expression == NULL) {
5251 l->pn = pn_Switch_default;
5254 if (l->is_empty_range)
5256 ir_tarval *min = l->first_case;
5257 ir_tarval *max = l->last_case;
5258 long pn = (long) i+1;
5259 ir_switch_table_set(res, i++, min, max, pn);
5265 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5267 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5268 ir_node *switch_node = NULL;
5270 if (currently_reachable()) {
5271 ir_node *expression = expression_to_value(statement->expression);
5272 ir_switch_table *table = create_switch_table(statement);
5273 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5275 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5278 set_unreachable_now();
5281 ir_node *const old_switch = current_switch;
5282 const bool old_saw_default_label = saw_default_label;
5283 saw_default_label = false;
5284 current_switch = switch_node;
5286 statement_to_firm(statement->body);
5287 jump_to_target(&break_target);
5289 if (!saw_default_label && switch_node) {
5290 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5291 add_pred_to_jump_target(&break_target, proj);
5294 enter_jump_target(&break_target);
5296 assert(current_switch == switch_node);
5297 current_switch = old_switch;
5298 saw_default_label = old_saw_default_label;
5303 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5305 if (current_switch != NULL && !statement->is_empty_range) {
5306 jump_target case_target;
5307 init_jump_target(&case_target, NULL);
5309 /* Fallthrough from previous case */
5310 jump_to_target(&case_target);
5312 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5313 add_pred_to_jump_target(&case_target, proj);
5314 if (statement->expression == NULL)
5315 saw_default_label = true;
5317 enter_jump_target(&case_target);
5320 return statement_to_firm(statement->statement);
5323 static ir_node *label_to_firm(const label_statement_t *statement)
5325 label_t *const label = statement->label;
5326 prepare_label_target(label);
5327 jump_to_target(&label->target);
5328 if (--label->n_users == 0) {
5329 enter_jump_target(&label->target);
5331 enter_immature_jump_target(&label->target);
5335 return statement_to_firm(statement->statement);
5338 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5340 label_t *const label = stmt->label;
5341 prepare_label_target(label);
5342 jump_to_target(&label->target);
5343 if (--label->n_users == 0)
5344 enter_jump_target(&label->target);
5345 set_unreachable_now();
5349 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5351 if (currently_reachable()) {
5352 ir_node *const op = expression_to_value(statement->expression);
5353 ARR_APP1(ir_node*, ijmp_ops, op);
5354 jump_to_target(&ijmp_target);
5355 set_unreachable_now();
5360 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5362 bool needs_memory = statement->is_volatile;
5363 size_t n_clobbers = 0;
5364 asm_clobber_t *clobber = statement->clobbers;
5365 for ( ; clobber != NULL; clobber = clobber->next) {
5366 const char *clobber_str = clobber->clobber.begin;
5368 if (!be_is_valid_clobber(clobber_str)) {
5369 errorf(&statement->base.pos,
5370 "invalid clobber '%s' specified", clobber->clobber);
5374 if (streq(clobber_str, "memory")) {
5375 needs_memory = true;
5379 ident *id = new_id_from_str(clobber_str);
5380 obstack_ptr_grow(&asm_obst, id);
5383 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5384 ident **clobbers = NULL;
5385 if (n_clobbers > 0) {
5386 clobbers = obstack_finish(&asm_obst);
5389 size_t n_inputs = 0;
5390 asm_argument_t *argument = statement->inputs;
5391 for ( ; argument != NULL; argument = argument->next)
5393 size_t n_outputs = 0;
5394 argument = statement->outputs;
5395 for ( ; argument != NULL; argument = argument->next)
5398 unsigned next_pos = 0;
5400 ir_node *ins[n_inputs + n_outputs + 1];
5403 ir_asm_constraint tmp_in_constraints[n_outputs];
5405 const expression_t *out_exprs[n_outputs];
5406 ir_node *out_addrs[n_outputs];
5407 size_t out_size = 0;
5409 argument = statement->outputs;
5410 for ( ; argument != NULL; argument = argument->next) {
5411 const char *constraints = argument->constraints.begin;
5412 asm_constraint_flags_t asm_flags
5413 = be_parse_asm_constraints(constraints);
5416 position_t const *const pos = &statement->base.pos;
5417 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5418 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5420 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5421 errorf(pos, "some constraints in '%s' are invalid", constraints);
5424 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5425 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5430 unsigned pos = next_pos++;
5431 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5432 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5433 expression_t *expr = argument->expression;
5434 ir_node *addr = expression_to_addr(expr);
5435 /* in+output, construct an artifical same_as constraint on the
5437 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5439 ir_node *value = get_value_from_lvalue(expr, addr);
5441 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5443 ir_asm_constraint constraint;
5444 constraint.pos = pos;
5445 constraint.constraint = new_id_from_str(buf);
5446 constraint.mode = get_ir_mode_storage(expr->base.type);
5447 tmp_in_constraints[in_size] = constraint;
5448 ins[in_size] = value;
5453 out_exprs[out_size] = expr;
5454 out_addrs[out_size] = addr;
5456 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5457 /* pure memory ops need no input (but we have to make sure we
5458 * attach to the memory) */
5459 assert(! (asm_flags &
5460 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5461 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5462 needs_memory = true;
5464 /* we need to attach the address to the inputs */
5465 expression_t *expr = argument->expression;
5467 ir_asm_constraint constraint;
5468 constraint.pos = pos;
5469 constraint.constraint = new_id_from_str(constraints);
5470 constraint.mode = mode_M;
5471 tmp_in_constraints[in_size] = constraint;
5473 ins[in_size] = expression_to_addr(expr);
5477 errorf(&statement->base.pos,
5478 "only modifiers but no place set in constraints '%s'",
5483 ir_asm_constraint constraint;
5484 constraint.pos = pos;
5485 constraint.constraint = new_id_from_str(constraints);
5486 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5488 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5490 assert(obstack_object_size(&asm_obst)
5491 == out_size * sizeof(ir_asm_constraint));
5492 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5495 obstack_grow(&asm_obst, tmp_in_constraints,
5496 in_size * sizeof(tmp_in_constraints[0]));
5497 /* find and count input and output arguments */
5498 argument = statement->inputs;
5499 for ( ; argument != NULL; argument = argument->next) {
5500 const char *constraints = argument->constraints.begin;
5501 asm_constraint_flags_t asm_flags
5502 = be_parse_asm_constraints(constraints);
5504 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5505 errorf(&statement->base.pos,
5506 "some constraints in '%s' are not supported", constraints);
5509 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5510 errorf(&statement->base.pos,
5511 "some constraints in '%s' are invalid", constraints);
5514 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5515 errorf(&statement->base.pos,
5516 "write flag specified for input constraints '%s'",
5522 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5523 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5524 /* we can treat this as "normal" input */
5525 input = expression_to_value(argument->expression);
5526 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5527 /* pure memory ops need no input (but we have to make sure we
5528 * attach to the memory) */
5529 assert(! (asm_flags &
5530 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5531 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5532 needs_memory = true;
5533 input = expression_to_addr(argument->expression);
5535 errorf(&statement->base.pos,
5536 "only modifiers but no place set in constraints '%s'",
5541 ir_asm_constraint constraint;
5542 constraint.pos = next_pos++;
5543 constraint.constraint = new_id_from_str(constraints);
5544 constraint.mode = get_irn_mode(input);
5546 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5547 ins[in_size++] = input;
5550 ir_node *mem = needs_memory ? get_store() : new_NoMem();
5551 assert(obstack_object_size(&asm_obst)
5552 == in_size * sizeof(ir_asm_constraint));
5553 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5555 /* create asm node */
5556 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5558 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5560 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5561 out_size, output_constraints,
5562 n_clobbers, clobbers, asm_text);
5564 if (statement->is_volatile) {
5565 set_irn_pinned(node, op_pin_state_pinned);
5567 set_irn_pinned(node, op_pin_state_floats);
5570 /* create output projs & connect them */
5572 ir_node *projm = new_Proj(node, mode_M, out_size);
5577 for (i = 0; i < out_size; ++i) {
5578 const expression_t *out_expr = out_exprs[i];
5580 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5581 ir_node *proj = new_Proj(node, mode, pn);
5582 ir_node *addr = out_addrs[i];
5584 set_value_for_expression_addr(out_expr, proj, addr);
5590 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5592 statement_to_firm(statement->try_statement);
5593 position_t const *const pos = &statement->base.pos;
5594 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5598 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5600 errorf(&statement->base.pos, "__leave not supported yet");
5605 * Transform a statement.
5607 static ir_node *statement_to_firm(statement_t *const stmt)
5610 assert(!stmt->base.transformed);
5611 stmt->base.transformed = true;
5614 switch (stmt->kind) {
5615 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5616 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5617 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5618 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5619 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5620 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5621 case STATEMENT_EMPTY: return NULL; /* nothing */
5622 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5623 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5624 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
5625 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5626 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5627 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5628 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5629 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5630 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5634 case STATEMENT_BREAK: tgt = &break_target; goto jump;
5635 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5637 jump_to_target(tgt);
5638 set_unreachable_now();
5642 case STATEMENT_ERROR: panic("error statement");
5644 panic("statement not implemented");
5647 static int count_local_variables(const entity_t *entity,
5648 const entity_t *const last)
5651 entity_t const *const end = last != NULL ? last->base.next : NULL;
5652 for (; entity != end; entity = entity->base.next) {
5653 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5654 !var_needs_entity(&entity->variable)) {
5655 type_t *type = skip_typeref(entity->declaration.type);
5656 count += is_type_complex(type) ? 2 : 1;
5662 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5664 int *const count = env;
5666 switch (stmt->kind) {
5667 case STATEMENT_DECLARATION: {
5668 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5669 *count += count_local_variables(decl_stmt->declarations_begin,
5670 decl_stmt->declarations_end);
5675 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5684 * Return the number of local (alias free) variables used by a function.
5686 static int get_function_n_local_vars(entity_t *entity)
5688 const function_t *function = &entity->function;
5691 /* count parameters */
5692 count += count_local_variables(function->parameters.entities, NULL);
5694 /* count local variables declared in body */
5695 walk_statements(function->body, count_local_variables_in_stmt, &count);
5700 * Build Firm code for the parameters of a function.
5702 static void initialize_function_parameters(entity_t *entity)
5704 assert(entity->kind == ENTITY_FUNCTION);
5705 ir_graph *irg = current_ir_graph;
5706 ir_node *args = get_irg_args(irg);
5708 ir_type *function_irtype;
5710 if (entity->function.need_closure) {
5711 /* add an extra parameter for the static link */
5712 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5715 /* Matze: IMO this is wrong, nested functions should have an own
5716 * type and not rely on strange parameters... */
5717 function_irtype = create_method_type(&entity->declaration.type->function, true);
5719 function_irtype = get_ir_type(entity->declaration.type);
5722 entity_t *parameter = entity->function.parameters.entities;
5723 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5724 if (parameter->kind != ENTITY_PARAMETER)
5727 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5728 type_t *type = skip_typeref(parameter->declaration.type);
5730 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5731 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5732 if (var_needs_entity(¶meter->variable)) {
5733 ir_type *frame_type = get_irg_frame_type(irg);
5735 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5736 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5737 parameter->variable.v.entity = param;
5738 } else if (is_type_complex(type)) {
5739 ir_type *frame_type = get_irg_frame_type(irg);
5741 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5742 ir_node *nomem = get_irg_no_mem(irg);
5743 ir_node *frame = get_irg_frame(irg);
5744 ir_node *addr = new_simpleSel(nomem, frame, param);
5745 complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5747 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5748 parameter->variable.v.value_number = next_value_number_function;
5749 set_irg_loc_description(irg, next_value_number_function,
5751 set_irg_loc_description(irg, next_value_number_function+1,
5753 set_value(next_value_number_function, value.real);
5754 set_value(next_value_number_function+1, value.imag);
5755 next_value_number_function += 2;
5757 ir_mode *param_mode = get_type_mode(param_irtype);
5759 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5760 value = conv_to_storage_type(dbgi, value, type);
5762 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5763 parameter->variable.v.value_number = next_value_number_function;
5764 set_irg_loc_description(irg, next_value_number_function,
5766 ++next_value_number_function;
5768 set_value(parameter->variable.v.value_number, value);
5773 static void add_function_pointer(ir_type *segment, ir_entity *method,
5774 const char *unique_template)
5776 ir_type *method_type = get_entity_type(method);
5777 ir_type *ptr_type = new_type_pointer(method_type);
5779 /* these entities don't really have a name but firm only allows
5781 * Note that we mustn't give these entities a name since for example
5782 * Mach-O doesn't allow them. */
5783 ident *ide = id_unique(unique_template);
5784 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5785 ir_graph *irg = get_const_code_irg();
5786 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5789 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5790 set_entity_compiler_generated(ptr, 1);
5791 set_entity_visibility(ptr, ir_visibility_private);
5792 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5793 set_atomic_ent_value(ptr, val);
5797 * Create code for a function and all inner functions.
5799 * @param entity the function entity
5801 static void create_function(entity_t *entity)
5803 assert(entity->kind == ENTITY_FUNCTION);
5804 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5806 if (entity->function.body == NULL)
5809 inner_functions = NULL;
5810 current_trampolines = NULL;
5812 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5813 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5814 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5816 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5817 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5818 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5821 current_function_entity = entity;
5822 current_function_name = NULL;
5823 current_funcsig = NULL;
5826 assert(!ijmp_blocks);
5827 init_jump_target(&ijmp_target, NULL);
5828 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5829 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5831 int n_local_vars = get_function_n_local_vars(entity);
5832 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5833 current_ir_graph = irg;
5835 ir_graph *old_current_function = current_function;
5836 current_function = irg;
5838 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5839 current_vararg_entity = NULL;
5841 set_irg_fp_model(irg, firm_fp_model);
5842 set_irn_dbg_info(get_irg_start_block(irg),
5843 get_entity_dbg_info(function_entity));
5845 next_value_number_function = 0;
5846 initialize_function_parameters(entity);
5847 current_static_link = entity->function.static_link;
5849 statement_to_firm(entity->function.body);
5851 ir_node *end_block = get_irg_end_block(irg);
5853 /* do we have a return statement yet? */
5854 if (currently_reachable()) {
5855 type_t *type = skip_typeref(entity->declaration.type);
5856 assert(is_type_function(type));
5857 type_t *const return_type = skip_typeref(type->function.return_type);
5860 if (is_type_void(return_type)) {
5861 ret = new_Return(get_store(), 0, NULL);
5863 ir_mode *const mode = get_ir_mode_storage(return_type);
5866 /* ยง5.1.2.2.3 main implicitly returns 0 */
5867 if (is_main(entity)) {
5868 in[0] = new_Const(get_mode_null(mode));
5870 in[0] = new_Unknown(mode);
5872 ret = new_Return(get_store(), 1, in);
5874 add_immBlock_pred(end_block, ret);
5877 if (enter_jump_target(&ijmp_target)) {
5879 size_t const n = ARR_LEN(ijmp_ops);
5880 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5881 ir_node *const ijmp = new_IJmp(op);
5882 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5883 ir_node *const block = ijmp_blocks[i];
5884 add_immBlock_pred(block, ijmp);
5885 mature_immBlock(block);
5889 DEL_ARR_F(ijmp_ops);
5890 DEL_ARR_F(ijmp_blocks);
5894 irg_finalize_cons(irg);
5896 /* finalize the frame type */
5897 ir_type *frame_type = get_irg_frame_type(irg);
5898 int n = get_compound_n_members(frame_type);
5901 for (int i = 0; i < n; ++i) {
5902 ir_entity *member = get_compound_member(frame_type, i);
5903 ir_type *entity_type = get_entity_type(member);
5905 int align = get_type_alignment_bytes(entity_type);
5906 if (align > align_all)
5910 misalign = offset % align;
5912 offset += align - misalign;
5916 set_entity_offset(member, offset);
5917 offset += get_type_size_bytes(entity_type);
5919 set_type_size_bytes(frame_type, offset);
5920 set_type_alignment_bytes(frame_type, align_all);
5922 irg_verify(irg, VERIFY_ENFORCE_SSA);
5923 current_vararg_entity = old_current_vararg_entity;
5924 current_function = old_current_function;
5926 if (current_trampolines != NULL) {
5927 DEL_ARR_F(current_trampolines);
5928 current_trampolines = NULL;
5931 /* create inner functions if any */
5932 entity_t **inner = inner_functions;
5933 if (inner != NULL) {
5934 ir_type *rem_outer_frame = current_outer_frame;
5935 current_outer_frame = get_irg_frame_type(current_ir_graph);
5936 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5937 create_function(inner[i]);
5941 current_outer_frame = rem_outer_frame;
5945 static void scope_to_firm(scope_t *scope)
5947 /* first pass: create declarations */
5948 entity_t *entity = scope->entities;
5949 for ( ; entity != NULL; entity = entity->base.next) {
5950 if (entity->base.symbol == NULL)
5953 if (entity->kind == ENTITY_FUNCTION) {
5954 if (entity->function.btk != BUILTIN_NONE) {
5955 /* builtins have no representation */
5958 (void)get_function_entity(entity, NULL);
5959 } else if (entity->kind == ENTITY_VARIABLE) {
5960 create_global_variable(entity);
5961 } else if (entity->kind == ENTITY_NAMESPACE) {
5962 scope_to_firm(&entity->namespacee.members);
5966 /* second pass: create code/initializers */
5967 entity = scope->entities;
5968 for ( ; entity != NULL; entity = entity->base.next) {
5969 if (entity->base.symbol == NULL)
5972 if (entity->kind == ENTITY_FUNCTION) {
5973 if (entity->function.btk != BUILTIN_NONE) {
5974 /* builtins have no representation */
5977 create_function(entity);
5978 } else if (entity->kind == ENTITY_VARIABLE) {
5979 assert(entity->declaration.kind
5980 == DECLARATION_KIND_GLOBAL_VARIABLE);
5981 current_ir_graph = get_const_code_irg();
5982 create_variable_initializer(entity);
5987 void init_ast2firm(void)
5989 obstack_init(&asm_obst);
5990 init_atomic_modes();
5992 ir_set_debug_retrieve(dbg_retrieve);
5993 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5995 /* create idents for all known runtime functions */
5996 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5997 rts_idents[i] = new_id_from_str(rts_data[i].name);
6000 entitymap_init(&entitymap);
6003 static void init_ir_types(void)
6005 static int ir_types_initialized = 0;
6006 if (ir_types_initialized)
6008 ir_types_initialized = 1;
6010 ir_type_char = get_ir_type(type_char);
6012 be_params = be_get_backend_param();
6013 mode_float_arithmetic = be_params->mode_float_arithmetic;
6015 stack_param_align = be_params->stack_param_align;
6018 void exit_ast2firm(void)
6020 entitymap_destroy(&entitymap);
6021 obstack_free(&asm_obst, NULL);
6024 static void global_asm_to_firm(statement_t *s)
6026 for (; s != NULL; s = s->base.next) {
6027 assert(s->kind == STATEMENT_ASM);
6029 char const *const text = s->asms.asm_text.begin;
6030 size_t const size = s->asms.asm_text.size;
6031 ident *const id = new_id_from_chars(text, size);
6036 static const char *get_cwd(void)
6038 static char buf[1024];
6039 if (buf[0] == '\0') {
6040 return getcwd(buf, sizeof(buf));
6045 void translation_unit_to_firm(translation_unit_t *unit)
6047 if (c_mode & _CXX) {
6048 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6049 } else if (c_mode & _C99) {
6050 be_dwarf_set_source_language(DW_LANG_C99);
6051 } else if (c_mode & _C89) {
6052 be_dwarf_set_source_language(DW_LANG_C89);
6054 be_dwarf_set_source_language(DW_LANG_C);
6056 const char *cwd = get_cwd();
6058 be_dwarf_set_compilation_directory(cwd);
6061 /* initialize firm arithmetic */
6062 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6063 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6065 /* just to be sure */
6066 init_jump_target(&break_target, NULL);
6067 init_jump_target(&continue_target, NULL);
6068 current_switch = NULL;
6069 current_translation_unit = unit;
6073 scope_to_firm(&unit->scope);
6074 global_asm_to_firm(unit->global_asm);
6076 current_ir_graph = NULL;
6077 current_translation_unit = NULL;