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 type_t *const from_type = skip_typeref(expr->value->base.type);
2211 ir_node *value = is_type_complex(from_type)
2212 ? expression_to_complex(expr->value).real
2213 : expression_to_value(expr->value);
2215 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2216 ir_mode *const mode = get_ir_mode_storage(type);
2217 /* check for conversion from / to __based types */
2218 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2219 const variable_t *from_var = from_type->pointer.base_variable;
2220 const variable_t *to_var = type->pointer.base_variable;
2221 if (from_var != to_var) {
2222 if (from_var != NULL) {
2223 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2224 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2225 value = new_d_Add(dbgi, value, base, mode);
2227 if (to_var != NULL) {
2228 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2229 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2230 value = new_d_Sub(dbgi, value, base, mode);
2235 return create_conv(dbgi, value, mode);
2238 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2240 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2241 type_t *const type = skip_typeref(expr->base.type);
2242 ir_mode *const mode = get_ir_mode_arithmetic(type);
2243 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2244 return new_d_Not(dbgi, value, mode);
2247 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2249 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2250 ir_node *value = expression_to_value(expr->value);
2251 type_t *const value_type = skip_typeref(expr->value->base.type);
2252 assert(is_type_pointer(value_type));
2254 /* check for __based */
2255 variable_t const *const base_var = value_type->pointer.base_variable;
2257 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2258 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2259 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2261 type_t *const points_to = value_type->pointer.points_to;
2262 return deref_address(dbgi, points_to, value);
2265 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2267 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2268 type_t *const type = skip_typeref(expr->base.type);
2269 ir_mode *const mode = get_ir_mode_arithmetic(type);
2270 ir_node *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2271 return new_d_Minus(dbgi, value, mode);
2274 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2275 ir_node *value, type_t *type)
2277 ir_mode *const mode = get_ir_mode_storage(type_ptrdiff_t);
2278 assert(is_type_pointer(type));
2279 pointer_type_t *const pointer_type = &type->pointer;
2280 type_t *const points_to = skip_typeref(pointer_type->points_to);
2281 ir_node * elem_size = get_type_size_node(points_to);
2282 elem_size = create_conv(dbgi, elem_size, mode);
2283 value = create_conv(dbgi, value, mode);
2284 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2288 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2291 ir_node *pin = new_Pin(new_NoMem());
2292 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2293 op_pin_state_floats);
2294 return new_d_Proj(dbgi, op, mode, pn_Div_res);
2297 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2300 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2301 type_t *const type_left = skip_typeref(expr->left->base.type);
2302 type_t *const type_right = skip_typeref(expr->right->base.type);
2303 expression_kind_t const kind = expr->base.kind;
2305 case EXPR_BINARY_SHIFTLEFT:
2306 case EXPR_BINARY_SHIFTRIGHT:
2307 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2308 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2309 mode = get_ir_mode_arithmetic(expr->base.type);
2310 left = create_conv(dbgi, left, mode);
2311 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2314 case EXPR_BINARY_SUB:
2315 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2316 const pointer_type_t *const ptr_type = &type_left->pointer;
2318 mode = get_ir_mode_storage(expr->base.type);
2319 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2320 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2321 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2322 ir_node *const no_mem = new_NoMem();
2323 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2324 mode, op_pin_state_floats);
2325 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2328 case EXPR_BINARY_SUB_ASSIGN:
2329 if (is_type_pointer(type_left)) {
2330 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2331 mode = get_ir_mode_storage(type_left);
2336 case EXPR_BINARY_ADD:
2337 case EXPR_BINARY_ADD_ASSIGN:
2338 if (is_type_pointer(type_left)) {
2339 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2340 mode = get_ir_mode_storage(type_left);
2342 } else if (is_type_pointer(type_right)) {
2343 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2344 mode = get_ir_mode_storage(type_right);
2351 mode = get_ir_mode_arithmetic(type_right);
2352 left = create_conv(dbgi, left, mode);
2353 right = create_conv(dbgi, right, mode);
2358 case EXPR_BINARY_ADD_ASSIGN:
2359 case EXPR_BINARY_ADD:
2360 return new_d_Add(dbgi, left, right, mode);
2361 case EXPR_BINARY_SUB_ASSIGN:
2362 case EXPR_BINARY_SUB:
2363 return new_d_Sub(dbgi, left, right, mode);
2364 case EXPR_BINARY_MUL_ASSIGN:
2365 case EXPR_BINARY_MUL:
2366 return new_d_Mul(dbgi, left, right, mode);
2367 case EXPR_BINARY_DIV:
2368 case EXPR_BINARY_DIV_ASSIGN:
2369 return create_div(dbgi, left, right, mode);
2370 case EXPR_BINARY_BITWISE_AND:
2371 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2372 return new_d_And(dbgi, left, right, mode);
2373 case EXPR_BINARY_BITWISE_OR:
2374 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2375 return new_d_Or(dbgi, left, right, mode);
2376 case EXPR_BINARY_BITWISE_XOR:
2377 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2378 return new_d_Eor(dbgi, left, right, mode);
2379 case EXPR_BINARY_SHIFTLEFT:
2380 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2381 return new_d_Shl(dbgi, left, right, mode);
2382 case EXPR_BINARY_SHIFTRIGHT:
2383 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2384 if (mode_is_signed(mode)) {
2385 return new_d_Shrs(dbgi, left, right, mode);
2387 return new_d_Shr(dbgi, left, right, mode);
2389 case EXPR_BINARY_MOD:
2390 case EXPR_BINARY_MOD_ASSIGN: {
2391 ir_node *pin = new_Pin(new_NoMem());
2392 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2393 op_pin_state_floats);
2394 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2398 panic("unexpected expression kind");
2402 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2404 ir_node *const left = expression_to_value(expr->left);
2405 ir_node *const right = expression_to_value(expr->right);
2406 return create_op(expr, left, right);
2410 * Check if a given expression is a GNU __builtin_expect() call.
2412 static bool is_builtin_expect(const expression_t *expression)
2414 if (expression->kind != EXPR_CALL)
2417 expression_t *function = expression->call.function;
2418 if (function->kind != EXPR_REFERENCE)
2420 reference_expression_t *ref = &function->reference;
2421 if (ref->entity->kind != ENTITY_FUNCTION ||
2422 ref->entity->function.btk != BUILTIN_EXPECT)
2428 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)
2430 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2431 ir_node *const cmp = new_d_Cmp(dbgi, left, right, relation);
2432 if (is_Const(cmp)) {
2433 if (tarval_is_null(get_Const_tarval(cmp))) {
2434 jump_to_target(false_target);
2436 jump_to_target(true_target);
2439 ir_node *const cond = new_d_Cond(dbgi, cmp);
2440 ir_node *const true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2441 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2443 /* set branch prediction info based on __builtin_expect */
2444 if (is_builtin_expect(expr) && is_Cond(cond)) {
2445 call_argument_t *const argument = expr->call.arguments->next;
2446 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2447 bool const cnst = fold_constant_to_bool(argument->expression);
2448 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2449 set_Cond_jmp_pred(cond, pred);
2453 add_pred_to_jump_target(true_target, true_proj);
2454 add_pred_to_jump_target(false_target, false_proj);
2456 set_unreachable_now();
2459 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2461 ir_node *val = NULL;
2462 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2463 ir_mode *const mode = get_ir_mode_storage(expr->base.type);
2464 jump_target exit_target;
2465 init_jump_target(&exit_target, NULL);
2467 if (enter_jump_target(true_target)) {
2468 jump_to_target(&exit_target);
2469 val = new_d_Const(dbgi, get_mode_one(mode));
2472 if (enter_jump_target(false_target)) {
2473 jump_to_target(&exit_target);
2474 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2476 ir_node *const in[] = { val, zero };
2477 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2483 if (!enter_jump_target(&exit_target)) {
2484 set_cur_block(new_Block(0, NULL));
2485 val = new_d_Bad(dbgi, mode);
2490 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2492 ir_node *const right = expression_to_value(expr->right);
2493 expression_t const *const left_expr = expr->left;
2494 ir_node *const addr = expression_to_addr(left_expr);
2495 ir_node *const left = get_value_from_lvalue(left_expr, addr);
2496 ir_node *result = create_op(expr, left, right);
2498 type_t *const type = skip_typeref(expr->base.type);
2499 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2500 jump_target true_target;
2501 jump_target false_target;
2502 init_jump_target(&true_target, NULL);
2503 init_jump_target(&false_target, NULL);
2504 ir_mode *const mode = get_irn_mode(result);
2505 ir_node *const zero = new_Const(get_mode_null(mode));
2506 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2507 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2510 return set_value_for_expression_addr(left_expr, result, addr);
2513 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2515 ir_node *const addr = expression_to_addr(expr->left);
2516 ir_node *const right = expression_to_value(expr->right);
2517 return set_value_for_expression_addr(expr->left, right, addr);
2520 /** evaluate an expression and discard the result, but still produce the
2522 static void evaluate_expression_discard_result(const expression_t *expression)
2524 type_t *type = skip_typeref(expression->base.type);
2525 if (is_type_complex(type)) {
2526 expression_to_complex(expression);
2528 expression_to_value(expression);
2532 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2534 evaluate_expression_discard_result(expr->left);
2535 return expression_to_value(expr->right);
2538 static ir_node *array_access_addr(const array_access_expression_t *expression)
2540 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2541 ir_node *base_addr = expression_to_value(expression->array_ref);
2542 ir_node *offset = expression_to_value(expression->index);
2543 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2544 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2545 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2550 static ir_node *array_access_to_firm(
2551 const array_access_expression_t *expression)
2553 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2554 ir_node *addr = array_access_addr(expression);
2555 type_t *type = revert_automatic_type_conversion(
2556 (const expression_t*) expression);
2557 type = skip_typeref(type);
2559 return deref_address(dbgi, type, addr);
2562 static long get_offsetof_offset(const offsetof_expression_t *expression)
2564 type_t *orig_type = expression->type;
2567 designator_t *designator = expression->designator;
2568 for ( ; designator != NULL; designator = designator->next) {
2569 type_t *type = skip_typeref(orig_type);
2570 /* be sure the type is constructed */
2571 (void) get_ir_type(type);
2573 if (designator->symbol != NULL) {
2574 assert(is_type_compound(type));
2575 symbol_t *symbol = designator->symbol;
2577 compound_t *compound = type->compound.compound;
2578 entity_t *iter = compound->members.entities;
2579 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2581 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2582 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2583 offset += get_entity_offset(iter->compound_member.entity);
2585 orig_type = iter->declaration.type;
2587 expression_t *array_index = designator->array_index;
2588 assert(designator->array_index != NULL);
2589 assert(is_type_array(type));
2591 long index = fold_constant_to_int(array_index);
2592 ir_type *arr_type = get_ir_type(type);
2593 ir_type *elem_type = get_array_element_type(arr_type);
2594 long elem_size = get_type_size_bytes(elem_type);
2596 offset += index * elem_size;
2598 orig_type = type->array.element_type;
2605 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2607 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2608 long offset = get_offsetof_offset(expression);
2609 ir_tarval *tv = new_tarval_from_long(offset, mode);
2610 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2612 return new_d_Const(dbgi, tv);
2615 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2616 ir_entity *entity, type_t *type);
2617 static ir_initializer_t *create_ir_initializer(
2618 const initializer_t *initializer, type_t *type);
2620 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2621 initializer_t *initializer,
2624 /* create the ir_initializer */
2625 PUSH_IRG(get_const_code_irg());
2626 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2629 ident *const id = id_unique("initializer.%u");
2630 ir_type *const irtype = get_ir_type(type);
2631 ir_type *const global_type = get_glob_type();
2632 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2633 set_entity_ld_ident(entity, id);
2634 set_entity_visibility(entity, ir_visibility_private);
2635 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2636 set_entity_initializer(entity, irinitializer);
2640 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2642 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2643 type_t *type = expression->type;
2644 initializer_t *initializer = expression->initializer;
2646 if (expression->global_scope ||
2647 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2648 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2649 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2650 return create_symconst(dbgi, entity);
2652 /* create an entity on the stack */
2653 ident *const id = id_unique("CompLit.%u");
2654 ir_type *const irtype = get_ir_type(type);
2655 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2657 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2658 set_entity_ld_ident(entity, id);
2660 /* create initialisation code */
2661 create_local_initializer(initializer, dbgi, entity, type);
2663 /* create a sel for the compound literal address */
2664 ir_node *frame = get_irg_frame(current_ir_graph);
2665 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2670 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2672 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2673 type_t *const type = expr->type;
2674 ir_node *const addr = compound_literal_addr(expr);
2675 return deref_address(dbgi, type, addr);
2679 * Transform a sizeof expression into Firm code.
2681 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2683 type_t *const type = skip_typeref(expression->type);
2684 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2685 if (is_type_array(type) && type->array.is_vla
2686 && expression->tp_expression != NULL) {
2687 expression_to_value(expression->tp_expression);
2690 return get_type_size_node(type);
2693 static entity_t *get_expression_entity(const expression_t *expression)
2695 if (expression->kind != EXPR_REFERENCE)
2698 return expression->reference.entity;
2701 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2703 switch (entity->kind) {
2704 case DECLARATION_KIND_CASES:
2705 return entity->declaration.alignment;
2708 return entity->compound.alignment;
2709 case ENTITY_TYPEDEF:
2710 return entity->typedefe.alignment;
2718 * Transform an alignof expression into Firm code.
2720 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2722 unsigned alignment = 0;
2724 const expression_t *tp_expression = expression->tp_expression;
2725 if (tp_expression != NULL) {
2726 entity_t *entity = get_expression_entity(tp_expression);
2727 if (entity != NULL) {
2728 alignment = get_cparser_entity_alignment(entity);
2732 if (alignment == 0) {
2733 type_t *type = expression->type;
2734 alignment = get_type_alignment(type);
2737 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2738 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2739 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2740 return new_d_Const(dbgi, tv);
2743 static void init_ir_types(void);
2745 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2747 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2749 bool constant_folding_old = constant_folding;
2750 constant_folding = true;
2751 int old_optimize = get_optimize();
2752 int old_constant_folding = get_opt_constant_folding();
2754 set_opt_constant_folding(1);
2758 PUSH_IRG(get_const_code_irg());
2759 ir_node *const cnst = expression_to_value(expression);
2762 set_optimize(old_optimize);
2763 set_opt_constant_folding(old_constant_folding);
2764 constant_folding = constant_folding_old;
2766 if (!is_Const(cnst))
2767 panic("couldn't fold constant");
2768 return get_Const_tarval(cnst);
2771 static complex_constant fold_complex_constant(const expression_t *expression)
2773 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2775 bool constant_folding_old = constant_folding;
2776 constant_folding = true;
2777 int old_optimize = get_optimize();
2778 int old_constant_folding = get_opt_constant_folding();
2780 set_opt_constant_folding(1);
2784 PUSH_IRG(get_const_code_irg());
2785 complex_value value = expression_to_complex(expression);
2788 set_optimize(old_optimize);
2789 set_opt_constant_folding(old_constant_folding);
2791 if (!is_Const(value.real) || !is_Const(value.imag)) {
2792 panic("couldn't fold constant");
2795 constant_folding = constant_folding_old;
2797 return (complex_constant) {
2798 get_Const_tarval(value.real),
2799 get_Const_tarval(value.imag)
2803 /* this function is only used in parser.c, but it relies on libfirm functionality */
2804 bool constant_is_negative(const expression_t *expression)
2806 ir_tarval *tv = fold_constant_to_tarval(expression);
2807 return tarval_is_negative(tv);
2810 long fold_constant_to_int(const expression_t *expression)
2812 ir_tarval *tv = fold_constant_to_tarval(expression);
2813 if (!tarval_is_long(tv)) {
2814 panic("result of constant folding is not integer");
2817 return get_tarval_long(tv);
2820 bool fold_constant_to_bool(const expression_t *expression)
2822 type_t *type = skip_typeref(expression->base.type);
2823 if (is_type_complex(type)) {
2824 complex_constant tvs = fold_complex_constant(expression);
2825 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2827 ir_tarval *tv = fold_constant_to_tarval(expression);
2828 return !tarval_is_null(tv);
2832 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2834 jump_target true_target;
2835 jump_target false_target;
2836 init_jump_target(&true_target, NULL);
2837 init_jump_target(&false_target, NULL);
2838 ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2840 ir_node *val = NULL;
2841 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2842 type_t *const type = skip_typeref(expression->base.type);
2843 ir_mode *const mode = get_ir_mode_arithmetic(type);
2844 jump_target exit_target;
2845 init_jump_target(&exit_target, NULL);
2847 if (enter_jump_target(&true_target)) {
2848 if (expression->true_expression) {
2849 val = expression_to_value(expression->true_expression);
2850 } else if (cond_expr) {
2853 /* Condition ended with a short circuit (&&, ||, !) operation or a
2854 * comparison. Generate a "1" as value for the true branch. */
2855 val = new_Const(get_mode_one(mode));
2858 val = create_conv(dbgi, val, mode);
2859 jump_to_target(&exit_target);
2862 if (enter_jump_target(&false_target)) {
2863 ir_node *false_val = expression_to_value(expression->false_expression);
2865 false_val = create_conv(dbgi, false_val, mode);
2866 jump_to_target(&exit_target);
2868 ir_node *const in[] = { val, false_val };
2869 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2875 if (!enter_jump_target(&exit_target)) {
2876 set_cur_block(new_Block(0, NULL));
2877 if (!is_type_void(type))
2878 val = new_Bad(mode);
2884 * Returns an IR-node representing the address of a field.
2886 static ir_node *select_addr(const select_expression_t *expression)
2888 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2890 construct_select_compound(expression);
2892 ir_node *compound_addr = expression_to_value(expression->compound);
2894 entity_t *entry = expression->compound_entry;
2895 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2896 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2898 if (constant_folding) {
2899 ir_mode *mode = get_irn_mode(compound_addr);
2900 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2901 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2902 return new_d_Add(dbgi, compound_addr, ofs, mode);
2904 ir_entity *irentity = entry->compound_member.entity;
2905 assert(irentity != NULL);
2906 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2910 static ir_node *select_to_firm(const select_expression_t *expression)
2912 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2913 ir_node *addr = select_addr(expression);
2914 type_t *type = revert_automatic_type_conversion(
2915 (const expression_t*) expression);
2916 type = skip_typeref(type);
2918 entity_t *entry = expression->compound_entry;
2919 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2921 if (entry->compound_member.bitfield) {
2922 return bitfield_extract_to_firm(expression, addr);
2925 return deref_address(dbgi, type, addr);
2928 /* Values returned by __builtin_classify_type. */
2929 typedef enum gcc_type_class
2935 enumeral_type_class,
2938 reference_type_class,
2942 function_type_class,
2953 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2955 type_t *type = expr->type_expression->base.type;
2957 /* FIXME gcc returns different values depending on whether compiling C or C++
2958 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2961 type = skip_typeref(type);
2962 switch (type->kind) {
2964 const atomic_type_t *const atomic_type = &type->atomic;
2965 switch (atomic_type->akind) {
2966 /* gcc cannot do that */
2967 case ATOMIC_TYPE_VOID:
2968 tc = void_type_class;
2971 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2972 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2973 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2974 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2975 case ATOMIC_TYPE_SHORT:
2976 case ATOMIC_TYPE_USHORT:
2977 case ATOMIC_TYPE_INT:
2978 case ATOMIC_TYPE_UINT:
2979 case ATOMIC_TYPE_LONG:
2980 case ATOMIC_TYPE_ULONG:
2981 case ATOMIC_TYPE_LONGLONG:
2982 case ATOMIC_TYPE_ULONGLONG:
2983 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2984 tc = integer_type_class;
2987 case ATOMIC_TYPE_FLOAT:
2988 case ATOMIC_TYPE_DOUBLE:
2989 case ATOMIC_TYPE_LONG_DOUBLE:
2990 tc = real_type_class;
2993 panic("Unexpected atomic type.");
2996 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2997 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2998 case TYPE_ARRAY: /* gcc handles this as pointer */
2999 case TYPE_FUNCTION: /* gcc handles this as pointer */
3000 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3001 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3002 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3004 /* gcc handles this as integer */
3005 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3007 /* gcc classifies the referenced type */
3008 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3010 /* typedef/typeof should be skipped already */
3016 panic("unexpected type.");
3020 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3021 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3022 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3023 return new_d_Const(dbgi, tv);
3026 static ir_node *function_name_to_firm(
3027 const funcname_expression_t *const expr)
3029 switch (expr->kind) {
3030 case FUNCNAME_FUNCTION:
3031 case FUNCNAME_PRETTY_FUNCTION:
3032 case FUNCNAME_FUNCDNAME:
3033 if (current_function_name == NULL) {
3034 position_t const *const src_pos = &expr->base.pos;
3035 char const *const name = current_function_entity->base.symbol->string;
3036 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3037 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3039 return current_function_name;
3040 case FUNCNAME_FUNCSIG:
3041 if (current_funcsig == NULL) {
3042 position_t const *const src_pos = &expr->base.pos;
3043 ir_entity *const ent = get_irg_entity(current_ir_graph);
3044 char const *const name = get_entity_ld_name(ent);
3045 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3046 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3048 return current_funcsig;
3050 panic("Unsupported function name");
3053 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3055 statement_t *statement = expr->statement;
3057 assert(statement->kind == STATEMENT_COMPOUND);
3058 return compound_statement_to_firm(&statement->compound);
3061 static ir_node *va_start_expression_to_firm(
3062 const va_start_expression_t *const expr)
3064 ir_entity *param_ent = current_vararg_entity;
3065 if (param_ent == NULL) {
3066 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3067 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3068 ir_type *const param_type = get_unknown_type();
3069 param_ent = new_parameter_entity(frame_type, n, param_type);
3070 current_vararg_entity = param_ent;
3073 ir_node *const frame = get_irg_frame(current_ir_graph);
3074 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3075 ir_node *const no_mem = new_NoMem();
3076 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3078 set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3083 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3085 type_t *const type = expr->base.type;
3086 expression_t *const ap_expr = expr->ap;
3087 ir_node *const ap_addr = expression_to_addr(ap_expr);
3088 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3089 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3090 ir_node *const res = deref_address(dbgi, type, ap);
3092 ir_node *const cnst = get_type_size_node(expr->base.type);
3093 ir_mode *const mode = get_irn_mode(cnst);
3094 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3095 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3096 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3097 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3098 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3100 set_value_for_expression_addr(ap_expr, add, ap_addr);
3106 * Generate Firm for a va_copy expression.
3108 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3110 ir_node *const src = expression_to_value(expr->src);
3111 set_value_for_expression_addr(expr->dst, src, NULL);
3115 static ir_node *dereference_addr(const unary_expression_t *const expression)
3117 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3118 return expression_to_value(expression->value);
3122 * Returns a IR-node representing an lvalue of the given expression.
3124 static ir_node *expression_to_addr(const expression_t *expression)
3126 switch (expression->kind) {
3127 case EXPR_ARRAY_ACCESS:
3128 return array_access_addr(&expression->array_access);
3129 case EXPR_COMPOUND_LITERAL:
3130 return compound_literal_addr(&expression->compound_literal);
3131 case EXPR_REFERENCE:
3132 return reference_addr(&expression->reference);
3134 return select_addr(&expression->select);
3135 case EXPR_UNARY_DEREFERENCE:
3136 return dereference_addr(&expression->unary);
3140 panic("trying to get address of non-lvalue");
3143 static ir_node *builtin_constant_to_firm(
3144 const builtin_constant_expression_t *expression)
3146 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3147 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3148 return create_Const_from_bool(mode, v);
3151 static ir_node *builtin_types_compatible_to_firm(
3152 const builtin_types_compatible_expression_t *expression)
3154 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3155 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3156 bool const value = types_compatible(left, right);
3157 ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3158 return create_Const_from_bool(mode, value);
3161 static void prepare_label_target(label_t *const label)
3163 if (label->address_taken && !label->indirect_block) {
3164 ir_node *const iblock = new_immBlock();
3165 label->indirect_block = iblock;
3166 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3167 jump_from_block_to_target(&label->target, iblock);
3172 * Pointer to a label. This is used for the
3173 * GNU address-of-label extension.
3175 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3177 /* Beware: Might be called from create initializer with current_ir_graph
3178 * set to const_code_irg. */
3179 PUSH_IRG(current_function);
3180 prepare_label_target(label->label);
3183 symconst_symbol value;
3184 value.entity_p = create_Block_entity(label->label->indirect_block);
3185 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3186 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3189 static ir_node *expression_to_value(expression_t const *const expr)
3192 if (!constant_folding) {
3193 assert(!expr->base.transformed);
3194 ((expression_t*)expr)->base.transformed = true;
3196 assert(!is_type_complex(skip_typeref(expr->base.type)));
3199 switch (expr->kind) {
3200 case EXPR_UNARY_CAST:
3201 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3202 case EXPR_BINARY_EQUAL:
3203 case EXPR_BINARY_GREATER:
3204 case EXPR_BINARY_GREATEREQUAL:
3205 case EXPR_BINARY_ISGREATER:
3206 case EXPR_BINARY_ISGREATEREQUAL:
3207 case EXPR_BINARY_ISLESS:
3208 case EXPR_BINARY_ISLESSEQUAL:
3209 case EXPR_BINARY_ISLESSGREATER:
3210 case EXPR_BINARY_ISUNORDERED:
3211 case EXPR_BINARY_LESS:
3212 case EXPR_BINARY_LESSEQUAL:
3213 case EXPR_BINARY_LOGICAL_AND:
3214 case EXPR_BINARY_LOGICAL_OR:
3215 case EXPR_BINARY_NOTEQUAL:
3216 case EXPR_UNARY_NOT:;
3217 jump_target true_target;
3218 jump_target false_target;
3219 init_jump_target(&true_target, NULL);
3220 init_jump_target(&false_target, NULL);
3221 expression_to_control_flow(expr, &true_target, &false_target);
3222 return control_flow_to_1_0(expr, &true_target, &false_target);
3224 return create_cast(&expr->unary);
3227 case EXPR_BINARY_ADD:
3228 case EXPR_BINARY_BITWISE_AND:
3229 case EXPR_BINARY_BITWISE_OR:
3230 case EXPR_BINARY_BITWISE_XOR:
3231 case EXPR_BINARY_DIV:
3232 case EXPR_BINARY_MOD:
3233 case EXPR_BINARY_MUL:
3234 case EXPR_BINARY_SHIFTLEFT:
3235 case EXPR_BINARY_SHIFTRIGHT:
3236 case EXPR_BINARY_SUB:
3237 return binop_to_firm(&expr->binary);
3239 case EXPR_BINARY_ADD_ASSIGN:
3240 case EXPR_BINARY_BITWISE_AND_ASSIGN:
3241 case EXPR_BINARY_BITWISE_OR_ASSIGN:
3242 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3243 case EXPR_BINARY_DIV_ASSIGN:
3244 case EXPR_BINARY_MOD_ASSIGN:
3245 case EXPR_BINARY_MUL_ASSIGN:
3246 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3247 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3248 case EXPR_BINARY_SUB_ASSIGN:
3249 return binop_assign_to_firm(&expr->binary);
3254 case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3255 case EXPR_UNARY_POSTFIX_INCREMENT: inc = true; pre = false; goto incdec;
3256 case EXPR_UNARY_PREFIX_DECREMENT: inc = false; pre = true; goto incdec;
3257 case EXPR_UNARY_PREFIX_INCREMENT: inc = true; pre = true; goto incdec;
3259 return incdec_to_firm(&expr->unary, inc, pre);
3262 case EXPR_UNARY_IMAG: {
3263 complex_value irvalue = expression_to_complex(expr->unary.value);
3264 return irvalue.imag;
3266 case EXPR_UNARY_REAL: {
3267 complex_value irvalue = expression_to_complex(expr->unary.value);
3268 return irvalue.real;
3271 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3272 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3273 case EXPR_BINARY_ASSIGN: return assign_expression_to_firm( &expr->binary);
3274 case EXPR_BINARY_COMMA: return comma_expression_to_firm( &expr->binary);
3275 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3276 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3277 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3278 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3279 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3280 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3281 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3282 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3283 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3284 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3285 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3286 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3287 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3288 case EXPR_SELECT: return select_to_firm( &expr->select);
3289 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3290 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3291 case EXPR_STRING_LITERAL: return string_to_firm( &expr->base.pos, "str.%u", &expr->string_literal.value);
3292 case EXPR_UNARY_ASSUME: return handle_assume( expr->unary.value);
3293 case EXPR_UNARY_COMPLEMENT: return complement_to_firm( &expr->unary);
3294 case EXPR_UNARY_DEREFERENCE: return dereference_to_firm( &expr->unary);
3295 case EXPR_UNARY_NEGATE: return negate_to_firm( &expr->unary);
3296 case EXPR_UNARY_PLUS: return expression_to_value( expr->unary.value);
3297 case EXPR_UNARY_TAKE_ADDRESS: return expression_to_addr( expr->unary.value);
3298 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3299 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3300 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3302 case EXPR_UNARY_DELETE:
3303 case EXPR_UNARY_DELETE_ARRAY:
3304 case EXPR_UNARY_THROW:
3305 panic("expression not implemented");
3310 panic("invalid expression");
3313 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3314 jump_target *const true_target, jump_target *const false_target,
3315 ir_relation relation);
3317 static complex_value complex_to_control_flow(const expression_t *expression,
3318 jump_target *true_target,
3319 jump_target *false_target);
3322 * create a short-circuit expression evaluation that tries to construct
3323 * efficient control flow structures for &&, || and ! expressions
3325 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3327 switch (expr->kind) {
3328 case EXPR_UNARY_NOT:
3329 expression_to_control_flow(expr->unary.value, false_target, true_target);
3332 case EXPR_BINARY_LOGICAL_AND: {
3333 jump_target extra_target;
3334 init_jump_target(&extra_target, NULL);
3335 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3336 if (enter_jump_target(&extra_target))
3337 expression_to_control_flow(expr->binary.right, true_target, false_target);
3341 case EXPR_BINARY_LOGICAL_OR: {
3342 jump_target extra_target;
3343 init_jump_target(&extra_target, NULL);
3344 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3345 if (enter_jump_target(&extra_target))
3346 expression_to_control_flow(expr->binary.right, true_target, false_target);
3350 case EXPR_BINARY_COMMA:
3351 evaluate_expression_discard_result(expr->binary.left);
3352 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3354 case EXPR_BINARY_EQUAL:
3355 case EXPR_BINARY_GREATER:
3356 case EXPR_BINARY_GREATEREQUAL:
3357 case EXPR_BINARY_ISGREATER:
3358 case EXPR_BINARY_ISGREATEREQUAL:
3359 case EXPR_BINARY_ISLESS:
3360 case EXPR_BINARY_ISLESSEQUAL:
3361 case EXPR_BINARY_ISLESSGREATER:
3362 case EXPR_BINARY_ISUNORDERED:
3363 case EXPR_BINARY_LESS:
3364 case EXPR_BINARY_LESSEQUAL:
3365 case EXPR_BINARY_NOTEQUAL: {
3366 type_t *const type = skip_typeref(expr->binary.left->base.type);
3367 ir_relation const relation = get_relation(expr->kind);
3368 if (is_type_complex(type)) {
3369 complex_equality_evaluation(&expr->binary, true_target,
3370 false_target, relation);
3374 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3375 ir_mode *const mode = get_ir_mode_arithmetic(type);
3376 ir_node *const left = create_conv(dbgi, expression_to_value(expr->binary.left), mode);
3377 ir_node *const right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3378 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3382 case EXPR_UNARY_CAST:
3383 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3384 expression_to_control_flow(expr->unary.value, true_target, false_target);
3388 type_t *const type = skip_typeref(expr->base.type);
3389 if (is_type_complex(type)) {
3390 complex_to_control_flow(expr, true_target, false_target);
3394 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3395 ir_mode *const mode = get_ir_mode_arithmetic(type);
3396 ir_node *const val = create_conv(dbgi, expression_to_value(expr), mode);
3397 ir_node *const left = val;
3398 ir_node *const right = new_Const(get_mode_null(get_irn_mode(val)));
3399 ir_relation const relation = ir_relation_unordered_less_greater;
3400 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3406 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3409 return (complex_value) {
3410 create_conv(dbgi, value.real, mode),
3411 create_conv(dbgi, value.imag, mode)
3415 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3416 complex_value const value, type_t *const type)
3418 ir_mode *const mode = get_complex_mode_storage(type);
3419 return complex_conv(dbgi, value, mode);
3422 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3423 complex_value value)
3425 value = complex_conv_to_storage(dbgi, value, type);
3426 ir_graph *const irg = current_ir_graph;
3427 ir_type *const irtype = get_ir_type(type);
3428 ir_node *const mem = get_store();
3429 ir_node *const nomem = get_irg_no_mem(irg);
3430 ir_mode *const mode = get_complex_mode_storage(type);
3431 ir_node *const real = create_conv(dbgi, value.real, mode);
3432 ir_node *const imag = create_conv(dbgi, value.imag, mode);
3433 ir_node *const storer = new_d_Store(dbgi, mem, addr, real, cons_floats);
3434 ir_node *const memr = new_Proj(storer, mode_M, pn_Store_M);
3435 ir_mode *const muint = atomic_modes[ATOMIC_TYPE_UINT];
3436 ir_node *const one = new_Const(get_mode_one(muint));
3437 ir_node *const in[1] = { one };
3438 ir_entity *const arrent = get_array_element_entity(irtype);
3439 ir_node *const addri = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3440 ir_node *const storei = new_d_Store(dbgi, memr, addri, imag, cons_floats);
3441 ir_node *const memi = new_Proj(storei, mode_M, pn_Store_M);
3445 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3446 complex_value value)
3448 ir_graph *const irg = current_ir_graph;
3449 ir_type *const frame_type = get_irg_frame_type(irg);
3450 ident *const id = id_unique("cmplex_tmp.%u");
3451 ir_type *const irtype = get_ir_type(type);
3452 ir_entity *const tmp_storage = new_entity(frame_type, id, irtype);
3453 ir_node *const frame = get_irg_frame(irg);
3454 ir_node *const nomem = get_irg_no_mem(irg);
3455 ir_node *const addr = new_simpleSel(nomem, frame, tmp_storage);
3456 set_entity_compiler_generated(tmp_storage, 1);
3457 store_complex(dbgi, addr, type, value);
3461 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3463 assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3464 || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3465 type_t *const type = skip_typeref(entity->declaration.type);
3466 ir_mode *const mode = get_complex_mode_storage(type);
3467 ir_node *const real = get_value(entity->variable.v.value_number, mode);
3468 ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3469 ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3470 return (complex_value) {
3471 create_conv(dbgi, real, mode_arithmetic),
3472 create_conv(dbgi, imag, mode_arithmetic)
3476 static complex_value complex_deref_address(dbg_info *const dbgi,
3477 type_t *type, ir_node *const addr,
3478 ir_cons_flags flags)
3480 type = skip_typeref(type);
3481 assert(is_type_complex(type));
3483 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3484 flags |= cons_volatile;
3485 ir_mode *const mode = get_complex_mode_storage(type);
3486 ir_node *const memory = get_store();
3487 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
3488 ir_node *const load_mem = new_Proj(load, mode_M, pn_Load_M);
3489 ir_node *const load_res = new_Proj(load, mode, pn_Load_res);
3491 ir_type *const irtype = get_ir_type(type);
3492 ir_mode *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3493 ir_node *const in[1] = { new_Const(get_mode_one(mode_uint)) };
3494 ir_entity *const entity = get_array_element_entity(irtype);
3495 ir_node *const nomem = get_irg_no_mem(current_ir_graph);
3496 ir_node *const addr2 = new_Sel(nomem, addr, 1, in, entity);
3497 ir_node *const load2 = new_d_Load(dbgi, load_mem, addr2, mode, flags);
3498 ir_node *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3499 ir_node *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3500 set_store(load_mem2);
3502 return (complex_value) { load_res, load_res2 };
3505 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3507 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
3508 entity_t *const entity = ref->entity;
3509 assert(is_declaration(entity));
3511 switch ((declaration_kind_t)entity->declaration.kind) {
3512 case DECLARATION_KIND_LOCAL_VARIABLE:
3513 case DECLARATION_KIND_PARAMETER:
3514 return read_localvar_complex(dbgi, entity);
3516 ir_node *const addr = reference_addr(ref);
3517 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3522 static complex_value complex_select_to_firm(const select_expression_t *select)
3524 dbg_info *const dbgi = get_dbg_info(&select->base.pos);
3525 ir_node *const addr = select_addr(select);
3526 type_t *const type = skip_typeref(select->base.type);
3527 return complex_deref_address(dbgi, type, addr, cons_none);
3530 static complex_value complex_array_access_to_firm(
3531 const array_access_expression_t *expression)
3533 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3534 ir_node *addr = array_access_addr(expression);
3535 type_t *type = skip_typeref(expression->base.type);
3536 assert(is_type_complex(type));
3537 return complex_deref_address(dbgi, type, addr, cons_none);
3540 static complex_value get_complex_from_lvalue(const expression_t *expression,
3543 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3545 if (expression->kind == EXPR_REFERENCE) {
3546 const reference_expression_t *ref = &expression->reference;
3548 entity_t *entity = ref->entity;
3549 assert(entity->kind == ENTITY_VARIABLE
3550 || entity->kind == ENTITY_PARAMETER);
3551 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3552 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3553 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3554 return read_localvar_complex(dbgi, entity);
3558 assert(addr != NULL);
3559 return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3562 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3564 const expression_t *const value = expression->value;
3565 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3566 type_t *const from_type = skip_typeref(value->base.type);
3567 type_t *const to_type = skip_typeref(expression->base.type);
3568 ir_mode *const mode = get_complex_mode_storage(to_type);
3570 if (is_type_complex(from_type)) {
3571 complex_value cvalue = expression_to_complex(value);
3572 return complex_conv(dbgi, cvalue, mode);
3574 ir_node *const value_node = expression_to_value(value);
3575 ir_node *const zero = new_Const(get_mode_null(mode));
3576 ir_node *const casted = create_conv(dbgi, value_node, mode);
3577 return (complex_value) { casted, zero };
3581 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3583 type_t *type = skip_typeref(literal->base.type);
3584 ir_mode *mode = get_complex_mode_storage(type);
3585 ir_node *litvalue = literal_to_firm_(literal, mode);
3586 ir_node *zero = new_Const(get_mode_null(mode));
3587 return (complex_value) { zero, litvalue };
3590 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3591 complex_value right, ir_mode *mode);
3593 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3594 complex_value right, ir_mode *mode)
3596 return (complex_value) {
3597 new_d_Add(dbgi, left.real, right.real, mode),
3598 new_d_Add(dbgi, left.imag, right.imag, mode)
3602 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3603 complex_value right, ir_mode *mode)
3605 return (complex_value) {
3606 new_d_Sub(dbgi, left.real, right.real, mode),
3607 new_d_Sub(dbgi, left.imag, right.imag, mode)
3611 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3612 complex_value right, ir_mode *mode)
3614 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3615 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3616 ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3617 ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3618 return (complex_value) {
3619 new_d_Sub(dbgi, op1, op2, mode),
3620 new_d_Add(dbgi, op3, op4, mode)
3624 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3625 complex_value right, ir_mode *mode)
3627 ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3628 ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3629 ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3630 ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3631 ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3632 ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3633 ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3634 ir_node *const real_divisor = new_d_Add(dbgi, op5, op6, mode);
3635 ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3636 ir_node *const imag_divisor = new_d_Add(dbgi, op5, op6, mode);
3637 return (complex_value) {
3638 create_div(dbgi, real_dividend, real_divisor, mode),
3639 create_div(dbgi, imag_dividend, imag_divisor, mode)
3643 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3646 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3649 ir_node *one = new_Const(get_mode_one(mode));
3650 return (complex_value) {
3651 new_d_Add(dbgi, value.real, one, mode),
3656 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3659 ir_node *one = new_Const(get_mode_one(mode));
3660 return (complex_value) {
3661 new_d_Sub(dbgi, value.real, one, mode),
3666 static void set_complex_value_for_expression(dbg_info *dbgi,
3667 const expression_t *expression,
3668 complex_value value,
3671 type_t *const type = skip_typeref(expression->base.type);
3672 ir_mode *const mode = get_complex_mode_storage(type);
3673 ir_node *const real = create_conv(dbgi, value.real, mode);
3674 ir_node *const imag = create_conv(dbgi, value.imag, mode);
3676 if (expression->kind == EXPR_REFERENCE) {
3677 const reference_expression_t *ref = &expression->reference;
3679 entity_t *entity = ref->entity;
3680 assert(is_declaration(entity));
3681 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3682 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3683 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3684 set_value(entity->variable.v.value_number, real);
3685 set_value(entity->variable.v.value_number+1, imag);
3691 addr = expression_to_addr(expression);
3692 assert(addr != NULL);
3693 store_complex(dbgi, addr, type, value);
3696 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3697 new_complex_unop constructor,
3700 dbg_info *const dbgi = get_dbg_info(&unop->base.pos);
3701 const expression_t *value_expr = unop->value;
3702 ir_node *addr = expression_to_addr(value_expr);
3703 complex_value value = get_complex_from_lvalue(value_expr, addr);
3704 type_t *type = skip_typeref(unop->base.type);
3705 ir_mode *mode = get_complex_mode_arithmetic(type);
3706 value = complex_conv(dbgi, value, mode);
3707 complex_value new_value = constructor(dbgi, value, mode);
3708 set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3709 return return_old ? value : new_value;
3712 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3714 complex_value cvalue = expression_to_complex(expr->value);
3715 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3716 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3717 cvalue = complex_conv(dbgi, cvalue, mode);
3718 return (complex_value) {
3719 new_d_Minus(dbgi, cvalue.real, mode),
3720 new_d_Minus(dbgi, cvalue.imag, mode)
3724 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3726 complex_value cvalue = expression_to_complex(expr->value);
3727 dbg_info *dbgi = get_dbg_info(&expr->base.pos);
3728 ir_mode *mode = get_complex_mode_arithmetic(expr->base.type);
3729 cvalue = complex_conv(dbgi, cvalue, mode);
3730 return (complex_value) {
3732 new_d_Minus(dbgi, cvalue.imag, mode)
3736 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3737 new_complex_binop constructor)
3739 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3740 ir_mode *mode = get_complex_mode_arithmetic(binexpr->base.type);
3741 complex_value left = expression_to_complex(binexpr->left);
3742 complex_value right = expression_to_complex(binexpr->right);
3743 left = complex_conv(dbgi, left, mode);
3744 right = complex_conv(dbgi, right, mode);
3745 return constructor(dbgi, left, right, mode);
3748 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3749 new_complex_binop constructor)
3751 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3752 expression_t *lefte = binexpr->left;
3753 expression_t *righte = binexpr->right;
3754 ir_mode *mode = get_complex_mode_arithmetic(righte->base.type);
3755 ir_node *addr = expression_to_addr(lefte);
3756 complex_value left = get_complex_from_lvalue(lefte, addr);
3757 complex_value right = expression_to_complex(righte);
3758 left = complex_conv(dbgi, left, mode);
3759 right = complex_conv(dbgi, right, mode);
3760 complex_value new_value = constructor(dbgi, left, right, mode);
3761 type_t *res_type = skip_typeref(binexpr->base.type);
3762 set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3763 return complex_conv_to_storage(dbgi, new_value, res_type);
3766 static complex_value complex_call_to_firm(const call_expression_t *call)
3768 ir_node *result = call_expression_to_firm(call);
3769 expression_t *function = call->function;
3770 type_t *type = skip_typeref(function->base.type);
3771 assert(is_type_pointer(type));
3772 pointer_type_t *pointer_type = &type->pointer;
3773 type_t *points_to = skip_typeref(pointer_type->points_to);
3774 assert(is_type_function(points_to));
3775 function_type_t *function_type = &points_to->function;
3776 type_t *return_type = skip_typeref(function_type->return_type);
3777 assert(is_type_complex(return_type));
3778 dbg_info *dbgi = get_dbg_info(&call->base.pos);
3779 return complex_deref_address(dbgi, return_type, result, cons_floats);
3782 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3783 jump_target *const true_target, jump_target *const false_target,
3784 ir_relation relation)
3786 jump_target extra_target;
3787 init_jump_target(&extra_target, NULL);
3789 complex_value left = expression_to_complex(binexpr->left);
3790 complex_value right = expression_to_complex(binexpr->right);
3791 dbg_info *dbgi = get_dbg_info(&binexpr->base.pos);
3792 ir_mode *mode = get_complex_mode_arithmetic(binexpr->left->base.type);
3793 left = complex_conv(dbgi, left, mode);
3794 right = complex_conv(dbgi, right, mode);
3796 ir_node *cmp_real = new_d_Cmp(dbgi, left.real, right.real, relation);
3797 ir_node *cond = new_d_Cond(dbgi, cmp_real);
3798 ir_node *true_proj = new_Proj(cond, mode_X, pn_Cond_true);
3799 ir_node *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3800 add_pred_to_jump_target(&extra_target, true_proj);
3801 add_pred_to_jump_target(false_target, false_proj);
3802 if (!enter_jump_target(&extra_target))
3805 ir_node *cmp_imag = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3806 ir_node *condi = new_d_Cond(dbgi, cmp_imag);
3807 ir_node *true_proj_i = new_Proj(condi, mode_X, pn_Cond_true);
3808 ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3809 add_pred_to_jump_target(true_target, true_proj_i);
3810 add_pred_to_jump_target(false_target, false_proj_i);
3811 set_unreachable_now();
3814 static complex_value complex_to_control_flow(
3815 const expression_t *const expression, jump_target *const true_target,
3816 jump_target *const false_target)
3818 jump_target extra_target;
3819 init_jump_target(&extra_target, NULL);
3820 complex_value value = expression_to_complex(expression);
3821 if (is_Const(value.real) && is_Const(value.imag)) {
3822 ir_tarval *tv_real = get_Const_tarval(value.real);
3823 ir_tarval *tv_imag = get_Const_tarval(value.imag);
3824 if (tarval_is_null(tv_real) && tarval_is_null(tv_imag)) {
3825 jump_to_target(false_target);
3827 jump_to_target(true_target);
3829 set_unreachable_now();
3833 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3834 type_t *const type = expression->base.type;
3835 ir_mode *const mode = get_complex_mode_arithmetic(type);
3836 value = complex_conv(dbgi, value, mode);
3837 ir_node *const zero = new_Const(get_mode_null(mode));
3838 ir_node *const cmp_real =
3839 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3840 ir_node *const cond_real = new_d_Cond(dbgi, cmp_real);
3841 ir_node *const true_real = new_Proj(cond_real, mode_X, pn_Cond_true);
3842 ir_node *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3843 add_pred_to_jump_target(true_target, true_real);
3844 add_pred_to_jump_target(&extra_target, false_real);
3845 if (!enter_jump_target(&extra_target))
3848 ir_node *const cmp_imag =
3849 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3850 ir_node *const cond_imag = new_d_Cond(dbgi, cmp_imag);
3851 ir_node *const true_imag = new_Proj(cond_imag, mode_X, pn_Cond_true);
3852 ir_node *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3853 add_pred_to_jump_target(true_target, true_imag);
3854 add_pred_to_jump_target(false_target, false_imag);
3855 set_unreachable_now();
3860 static complex_value complex_conditional_to_firm(
3861 const conditional_expression_t *const expression)
3863 jump_target true_target;
3864 jump_target false_target;
3865 init_jump_target(&true_target, NULL);
3866 init_jump_target(&false_target, NULL);
3867 complex_value cond_val;
3868 memset(&cond_val, 0, sizeof(cond_val));
3869 if (expression->true_expression == NULL) {
3870 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3871 cond_val = complex_to_control_flow(expression->condition,
3872 &true_target, &false_target);
3874 expression_to_control_flow(expression->condition, &true_target, &false_target);
3878 memset(&val, 0, sizeof(val));
3879 jump_target exit_target;
3880 init_jump_target(&exit_target, NULL);
3881 type_t *const type = skip_typeref(expression->base.type);
3882 ir_mode *const mode = get_complex_mode_arithmetic(type);
3883 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3885 if (enter_jump_target(&true_target)) {
3886 if (expression->true_expression) {
3887 val = expression_to_complex(expression->true_expression);
3889 assert(cond_val.real != NULL);
3892 val = complex_conv(dbgi, val, mode);
3893 jump_to_target(&exit_target);
3896 if (enter_jump_target(&false_target)) {
3897 complex_value false_val
3898 = expression_to_complex(expression->false_expression);
3899 false_val = complex_conv(dbgi, false_val, mode);
3900 jump_to_target(&exit_target);
3901 if (val.real != NULL) {
3902 ir_node *const inr[] = { val.real, false_val.real };
3903 ir_node *const ini[] = { val.imag, false_val.imag };
3904 ir_node *const block = exit_target.block;
3905 val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3906 val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3912 if (!enter_jump_target(&exit_target)) {
3913 set_cur_block(new_Block(0, NULL));
3914 assert(!is_type_void(type));
3915 val.real = val.imag = new_Bad(mode);
3920 static void create_local_declarations(entity_t*);
3922 static complex_value compound_statement_to_firm_complex(
3923 const compound_statement_t *compound)
3925 create_local_declarations(compound->scope.entities);
3927 complex_value result = { NULL, NULL };
3928 statement_t *statement = compound->statements;
3930 for ( ; statement != NULL; statement = next) {
3931 next = statement->base.next;
3932 /* last statement is the return value */
3934 /* it must be an expression, otherwise we wouldn't be in the
3935 * complex variant of compound_statement_to_firm */
3936 if (statement->kind != STATEMENT_EXPRESSION)
3937 panic("last member of complex statement expression not an expression statement");
3938 expression_t *expression = statement->expression.expression;
3939 assert(is_type_complex(skip_typeref(expression->base.type)));
3940 result = expression_to_complex(expression);
3942 statement_to_firm(statement);
3949 static complex_value complex_assign_to_firm(const binary_expression_t *expr)
3951 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3952 complex_value const value = expression_to_complex(expr->right);
3953 ir_node *const addr = expression_to_addr(expr->left);
3954 set_complex_value_for_expression(dbgi, expr->left, value, addr);
3958 static complex_value complex_statement_expression_to_firm(
3959 const statement_expression_t *const expr)
3961 const statement_t *const statement = expr->statement;
3962 assert(statement->kind == STATEMENT_COMPOUND);
3964 return compound_statement_to_firm_complex(&statement->compound);
3967 static complex_value expression_to_complex(const expression_t *expression)
3969 switch (expression->kind) {
3970 case EXPR_REFERENCE:
3971 return complex_reference_to_firm(&expression->reference);
3973 return complex_select_to_firm(&expression->select);
3974 case EXPR_ARRAY_ACCESS:
3975 return complex_array_access_to_firm(&expression->array_access);
3976 case EXPR_UNARY_CAST:
3977 return complex_cast_to_firm(&expression->unary);
3978 case EXPR_BINARY_COMMA:
3979 evaluate_expression_discard_result(expression->binary.left);
3980 return expression_to_complex(expression->binary.right);
3981 case EXPR_BINARY_ADD:
3982 return create_complex_binop(&expression->binary, new_complex_add);
3983 case EXPR_BINARY_ADD_ASSIGN:
3984 return create_complex_assign_binop(&expression->binary, new_complex_add);
3985 case EXPR_BINARY_SUB:
3986 return create_complex_binop(&expression->binary, new_complex_sub);
3987 case EXPR_BINARY_SUB_ASSIGN:
3988 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3989 case EXPR_BINARY_MUL:
3990 return create_complex_binop(&expression->binary, new_complex_mul);
3991 case EXPR_BINARY_MUL_ASSIGN:
3992 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3993 case EXPR_BINARY_DIV:
3994 return create_complex_binop(&expression->binary, new_complex_div);
3995 case EXPR_BINARY_DIV_ASSIGN:
3996 return create_complex_assign_binop(&expression->binary, new_complex_div);
3997 case EXPR_UNARY_PLUS:
3998 return expression_to_complex(expression->unary.value);
3999 case EXPR_UNARY_PREFIX_INCREMENT:
4000 return create_complex_assign_unop(&expression->unary,
4001 new_complex_increment, false);
4002 case EXPR_UNARY_PREFIX_DECREMENT:
4003 return create_complex_assign_unop(&expression->unary,
4004 new_complex_decrement, false);
4005 case EXPR_UNARY_POSTFIX_INCREMENT:
4006 return create_complex_assign_unop(&expression->unary,
4007 new_complex_increment, true);
4008 case EXPR_UNARY_POSTFIX_DECREMENT:
4009 return create_complex_assign_unop(&expression->unary,
4010 new_complex_decrement, true);
4011 case EXPR_UNARY_NEGATE:
4012 return complex_negate_to_firm(&expression->unary);
4013 case EXPR_UNARY_COMPLEMENT:
4014 return complex_complement_to_firm(&expression->unary);
4015 case EXPR_BINARY_ASSIGN:
4016 return complex_assign_to_firm(&expression->binary);
4017 case EXPR_LITERAL_CASES:
4018 return complex_literal_to_firm(&expression->literal);
4020 return complex_call_to_firm(&expression->call);
4021 case EXPR_CONDITIONAL:
4022 return complex_conditional_to_firm(&expression->conditional);
4023 case EXPR_STATEMENT:
4024 return complex_statement_expression_to_firm(&expression->statement);
4026 panic("unexpected complex expression");
4032 static void create_variable_entity(entity_t *variable,
4033 declaration_kind_t declaration_kind,
4034 ir_type *parent_type)
4036 assert(variable->kind == ENTITY_VARIABLE);
4037 type_t *type = skip_typeref(variable->declaration.type);
4039 ident *const id = new_id_from_str(variable->base.symbol->string);
4040 ir_type *const irtype = get_ir_type(type);
4041 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
4042 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
4043 unsigned alignment = variable->declaration.alignment;
4045 set_entity_alignment(irentity, alignment);
4047 handle_decl_modifiers(irentity, variable);
4049 variable->declaration.kind = (unsigned char) declaration_kind;
4050 variable->variable.v.entity = irentity;
4051 set_entity_ld_ident(irentity, create_ld_ident(variable));
4053 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4054 set_entity_volatility(irentity, volatility_is_volatile);
4059 typedef struct type_path_entry_t type_path_entry_t;
4060 struct type_path_entry_t {
4062 ir_initializer_t *initializer;
4064 entity_t *compound_entry;
4067 typedef struct type_path_t type_path_t;
4068 struct type_path_t {
4069 type_path_entry_t *path;
4074 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
4076 size_t len = ARR_LEN(path->path);
4078 for (size_t i = 0; i < len; ++i) {
4079 const type_path_entry_t *entry = & path->path[i];
4081 type_t *type = skip_typeref(entry->type);
4082 if (is_type_compound(type)) {
4083 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
4084 } else if (is_type_array(type)) {
4085 fprintf(stderr, "[%u]", (unsigned) entry->index);
4087 fprintf(stderr, "-INVALID-");
4090 fprintf(stderr, " (");
4091 print_type(path->top_type);
4092 fprintf(stderr, ")");
4095 static type_path_entry_t *get_type_path_top(const type_path_t *path)
4097 size_t len = ARR_LEN(path->path);
4099 return & path->path[len-1];
4102 static type_path_entry_t *append_to_type_path(type_path_t *path)
4104 size_t len = ARR_LEN(path->path);
4105 ARR_RESIZE(type_path_entry_t, path->path, len+1);
4107 type_path_entry_t *result = & path->path[len];
4108 memset(result, 0, sizeof(result[0]));
4112 static size_t get_compound_member_count(const compound_type_t *type)
4114 compound_t *compound = type->compound;
4115 size_t n_members = 0;
4116 entity_t *member = compound->members.entities;
4117 for ( ; member != NULL; member = member->base.next) {
4124 static ir_initializer_t *get_initializer_entry(type_path_t *path)
4126 type_t *orig_top_type = path->top_type;
4127 type_t *top_type = skip_typeref(orig_top_type);
4129 assert(is_type_compound(top_type) || is_type_array(top_type));
4131 if (ARR_LEN(path->path) == 0) {
4134 type_path_entry_t *top = get_type_path_top(path);
4135 ir_initializer_t *initializer = top->initializer;
4136 return get_initializer_compound_value(initializer, top->index);
4140 static void descend_into_subtype(type_path_t *path)
4142 type_t *orig_top_type = path->top_type;
4143 type_t *top_type = skip_typeref(orig_top_type);
4145 assert(is_type_compound(top_type) || is_type_array(top_type));
4147 ir_initializer_t *initializer = get_initializer_entry(path);
4149 type_path_entry_t *top = append_to_type_path(path);
4150 top->type = top_type;
4154 if (is_type_compound(top_type)) {
4155 compound_t *const compound = top_type->compound.compound;
4156 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
4158 top->compound_entry = entry;
4160 len = get_compound_member_count(&top_type->compound);
4161 if (entry != NULL) {
4162 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4163 path->top_type = entry->declaration.type;
4166 assert(is_type_array(top_type));
4167 assert(top_type->array.size > 0);
4170 path->top_type = top_type->array.element_type;
4171 len = top_type->array.size;
4173 if (initializer == NULL
4174 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
4175 initializer = create_initializer_compound(len);
4176 /* we have to set the entry at the 2nd latest path entry... */
4177 size_t path_len = ARR_LEN(path->path);
4178 assert(path_len >= 1);
4180 type_path_entry_t *entry = & path->path[path_len-2];
4181 ir_initializer_t *tinitializer = entry->initializer;
4182 set_initializer_compound_value(tinitializer, entry->index,
4186 top->initializer = initializer;
4189 static void ascend_from_subtype(type_path_t *path)
4191 type_path_entry_t *top = get_type_path_top(path);
4193 path->top_type = top->type;
4195 size_t len = ARR_LEN(path->path);
4196 ARR_RESIZE(type_path_entry_t, path->path, len-1);
4199 static void walk_designator(type_path_t *path, const designator_t *designator)
4201 /* designators start at current object type */
4202 ARR_RESIZE(type_path_entry_t, path->path, 1);
4204 for ( ; designator != NULL; designator = designator->next) {
4205 type_path_entry_t *top = get_type_path_top(path);
4206 type_t *orig_type = top->type;
4207 type_t *type = skip_typeref(orig_type);
4209 if (designator->symbol != NULL) {
4210 assert(is_type_compound(type));
4212 symbol_t *symbol = designator->symbol;
4214 compound_t *compound = type->compound.compound;
4215 entity_t *iter = compound->members.entities;
4216 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
4217 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
4219 /* revert previous initialisations of other union elements */
4220 if (type->kind == TYPE_COMPOUND_UNION) {
4221 ir_initializer_t *initializer = top->initializer;
4222 if (initializer != NULL
4223 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
4224 /* are we writing to a new element? */
4225 ir_initializer_t *oldi
4226 = get_initializer_compound_value(initializer, index);
4227 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
4228 /* clear initializer */
4230 = get_initializer_compound_n_entries(initializer);
4231 ir_initializer_t *nulli = get_initializer_null();
4232 for (size_t i = 0; i < len; ++i) {
4233 set_initializer_compound_value(initializer, i,
4240 top->type = orig_type;
4241 top->compound_entry = iter;
4243 orig_type = iter->declaration.type;
4245 expression_t *array_index = designator->array_index;
4246 assert(is_type_array(type));
4248 long index = fold_constant_to_int(array_index);
4249 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
4251 top->type = orig_type;
4252 top->index = (size_t) index;
4253 orig_type = type->array.element_type;
4255 path->top_type = orig_type;
4257 if (designator->next != NULL) {
4258 descend_into_subtype(path);
4262 path->invalid = false;
4265 static void advance_current_object(type_path_t *path)
4267 if (path->invalid) {
4268 /* TODO: handle this... */
4269 panic("invalid initializer (excessive elements)");
4272 type_path_entry_t *top = get_type_path_top(path);
4274 type_t *type = skip_typeref(top->type);
4275 if (is_type_union(type)) {
4276 /* only the first element is initialized in unions */
4277 top->compound_entry = NULL;
4278 } else if (is_type_struct(type)) {
4279 entity_t *entry = top->compound_entry;
4282 entry = skip_unnamed_bitfields(entry->base.next);
4283 top->compound_entry = entry;
4284 if (entry != NULL) {
4285 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4286 path->top_type = entry->declaration.type;
4290 assert(is_type_array(type));
4293 if (!type->array.size_constant || top->index < type->array.size) {
4298 /* we're past the last member of the current sub-aggregate, try if we
4299 * can ascend in the type hierarchy and continue with another subobject */
4300 size_t len = ARR_LEN(path->path);
4303 ascend_from_subtype(path);
4304 advance_current_object(path);
4306 path->invalid = true;
4311 static ir_initializer_t *create_ir_initializer_value(
4312 const initializer_value_t *initializer)
4314 expression_t *expr = initializer->value;
4315 type_t *type = skip_typeref(expr->base.type);
4317 if (is_type_compound(type)) {
4318 if (expr->kind == EXPR_UNARY_CAST) {
4319 expr = expr->unary.value;
4320 type = skip_typeref(expr->base.type);
4322 /* must be a compound literal... */
4323 if (expr->kind == EXPR_COMPOUND_LITERAL) {
4324 return create_ir_initializer(expr->compound_literal.initializer,
4327 } else if (is_type_complex(type)) {
4328 complex_value const value = expression_to_complex(expr);
4329 ir_mode *const mode = get_complex_mode_storage(type);
4330 ir_node *const real = create_conv(NULL, value.real, mode);
4331 ir_node *const imag = create_conv(NULL, value.imag, mode);
4332 ir_initializer_t *const res = create_initializer_compound(2);
4333 ir_initializer_t *const init_real = create_initializer_const(real);
4334 ir_initializer_t *const init_imag = create_initializer_const(imag);
4335 set_initializer_compound_value(res, 0, init_real);
4336 set_initializer_compound_value(res, 1, init_imag);
4340 ir_node *value = expression_to_value(expr);
4341 value = conv_to_storage_type(NULL, value, type);
4342 return create_initializer_const(value);
4345 /** Tests whether type can be initialized by a string constant */
4346 static bool is_string_type(type_t *type)
4348 if (!is_type_array(type))
4351 type_t *const inner = skip_typeref(type->array.element_type);
4352 return is_type_integer(inner);
4355 static ir_initializer_t *create_ir_initializer_list(
4356 const initializer_list_t *initializer, type_t *type)
4359 memset(&path, 0, sizeof(path));
4360 path.top_type = type;
4361 path.path = NEW_ARR_F(type_path_entry_t, 0);
4363 descend_into_subtype(&path);
4365 for (size_t i = 0; i < initializer->len; ++i) {
4366 const initializer_t *sub_initializer = initializer->initializers[i];
4368 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4369 walk_designator(&path, sub_initializer->designator.designator);
4373 if (sub_initializer->kind == INITIALIZER_VALUE) {
4374 const expression_t *expr = sub_initializer->value.value;
4375 const type_t *expr_type = skip_typeref(expr->base.type);
4376 /* we might have to descend into types until the types match */
4378 type_t *orig_top_type = path.top_type;
4379 type_t *top_type = skip_typeref(orig_top_type);
4381 if (types_compatible(top_type, expr_type))
4383 descend_into_subtype(&path);
4385 } else if (sub_initializer->kind == INITIALIZER_STRING) {
4386 /* we might have to descend into types until we're at a scalar
4389 type_t *orig_top_type = path.top_type;
4390 type_t *top_type = skip_typeref(orig_top_type);
4392 if (is_string_type(top_type))
4394 descend_into_subtype(&path);
4398 ir_initializer_t *sub_irinitializer
4399 = create_ir_initializer(sub_initializer, path.top_type);
4401 size_t path_len = ARR_LEN(path.path);
4402 assert(path_len >= 1);
4403 type_path_entry_t *entry = & path.path[path_len-1];
4404 ir_initializer_t *tinitializer = entry->initializer;
4405 set_initializer_compound_value(tinitializer, entry->index,
4408 advance_current_object(&path);
4411 assert(ARR_LEN(path.path) >= 1);
4412 ir_initializer_t *result = path.path[0].initializer;
4413 DEL_ARR_F(path.path);
4418 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
4420 type = skip_typeref(type);
4422 assert(type->kind == TYPE_ARRAY);
4423 assert(type->array.size_constant);
4424 string_literal_expression_t const *const str = get_init_string(init);
4425 size_t const str_len = str->value.size;
4426 size_t const arr_len = type->array.size;
4427 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
4428 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
4429 char const * p = str->value.begin;
4430 switch (str->value.encoding) {
4431 case STRING_ENCODING_CHAR:
4432 case STRING_ENCODING_UTF8:
4433 for (size_t i = 0; i != arr_len; ++i) {
4434 char const c = i < str_len ? *p++ : 0;
4435 ir_tarval *const tv = new_tarval_from_long(c, mode);
4436 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4437 set_initializer_compound_value(irinit, i, tvinit);
4441 case STRING_ENCODING_CHAR16:
4442 case STRING_ENCODING_CHAR32:
4443 case STRING_ENCODING_WIDE:
4444 for (size_t i = 0; i != arr_len; ++i) {
4445 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
4446 ir_tarval *const tv = new_tarval_from_long(c, mode);
4447 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4448 set_initializer_compound_value(irinit, i, tvinit);
4456 static ir_initializer_t *create_ir_initializer(
4457 const initializer_t *initializer, type_t *type)
4459 switch (initializer->kind) {
4460 case INITIALIZER_STRING:
4461 return create_ir_initializer_string(initializer, type);
4463 case INITIALIZER_LIST:
4464 return create_ir_initializer_list(&initializer->list, type);
4466 case INITIALIZER_VALUE:
4467 return create_ir_initializer_value(&initializer->value);
4469 case INITIALIZER_DESIGNATOR:
4470 panic("unexpected designator initializer");
4472 panic("unknown initializer");
4475 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4476 * are elements [...] the remainder of the aggregate shall be initialized
4477 * implicitly the same as objects that have static storage duration. */
4478 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4481 /* for unions we must NOT do anything for null initializers */
4482 ir_type *owner = get_entity_owner(entity);
4483 if (is_Union_type(owner)) {
4487 ir_type *ent_type = get_entity_type(entity);
4488 /* create sub-initializers for a compound type */
4489 if (is_compound_type(ent_type)) {
4490 unsigned n_members = get_compound_n_members(ent_type);
4491 for (unsigned n = 0; n < n_members; ++n) {
4492 ir_entity *member = get_compound_member(ent_type, n);
4493 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4495 create_dynamic_null_initializer(member, dbgi, addr);
4499 if (is_Array_type(ent_type)) {
4500 assert(has_array_upper_bound(ent_type, 0));
4501 long n = get_array_upper_bound_int(ent_type, 0);
4502 for (long i = 0; i < n; ++i) {
4503 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4504 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4505 ir_node *cnst = new_d_Const(dbgi, index_tv);
4506 ir_node *in[1] = { cnst };
4507 ir_entity *arrent = get_array_element_entity(ent_type);
4508 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4510 create_dynamic_null_initializer(arrent, dbgi, addr);
4515 ir_mode *value_mode = get_type_mode(ent_type);
4516 ir_node *node = new_Const(get_mode_null(value_mode));
4518 /* is it a bitfield type? */
4519 if (is_Primitive_type(ent_type) &&
4520 get_primitive_base_type(ent_type) != NULL) {
4521 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4525 ir_node *mem = get_store();
4526 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4527 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4531 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4532 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4534 switch (get_initializer_kind(initializer)) {
4535 case IR_INITIALIZER_NULL:
4536 create_dynamic_null_initializer(entity, dbgi, base_addr);
4538 case IR_INITIALIZER_CONST: {
4539 ir_node *node = get_initializer_const_value(initializer);
4540 ir_type *ent_type = get_entity_type(entity);
4542 /* is it a bitfield type? */
4543 if (is_Primitive_type(ent_type) &&
4544 get_primitive_base_type(ent_type) != NULL) {
4545 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4549 ir_node *mem = get_store();
4551 if (is_compound_type(ent_type)) {
4552 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
4553 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4555 assert(get_type_mode(type) == get_irn_mode(node));
4556 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4557 new_mem = new_Proj(store, mode_M, pn_Store_M);
4562 case IR_INITIALIZER_TARVAL: {
4563 ir_tarval *tv = get_initializer_tarval_value(initializer);
4564 ir_node *cnst = new_d_Const(dbgi, tv);
4565 ir_type *ent_type = get_entity_type(entity);
4567 /* is it a bitfield type? */
4568 if (is_Primitive_type(ent_type) &&
4569 get_primitive_base_type(ent_type) != NULL) {
4570 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4574 assert(get_type_mode(type) == get_tarval_mode(tv));
4575 ir_node *mem = get_store();
4576 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4577 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4581 case IR_INITIALIZER_COMPOUND: {
4582 assert(is_compound_type(type) || is_Array_type(type));
4584 if (is_Array_type(type)) {
4585 assert(has_array_upper_bound(type, 0));
4586 n_members = get_array_upper_bound_int(type, 0);
4588 n_members = get_compound_n_members(type);
4591 if (get_initializer_compound_n_entries(initializer)
4592 != (unsigned) n_members)
4593 panic("initializer doesn't match compound type");
4595 for (int i = 0; i < n_members; ++i) {
4598 ir_entity *sub_entity;
4599 if (is_Array_type(type)) {
4600 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4601 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4602 ir_node *cnst = new_d_Const(dbgi, index_tv);
4603 ir_node *in[1] = { cnst };
4604 irtype = get_array_element_type(type);
4605 sub_entity = get_array_element_entity(type);
4606 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4609 sub_entity = get_compound_member(type, i);
4610 irtype = get_entity_type(sub_entity);
4611 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4615 ir_initializer_t *sub_init
4616 = get_initializer_compound_value(initializer, i);
4618 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4625 panic("invalid ir_initializer");
4628 static void create_dynamic_initializer(ir_initializer_t *initializer,
4629 dbg_info *dbgi, ir_entity *entity)
4631 ir_node *frame = get_irg_frame(current_ir_graph);
4632 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4633 ir_type *type = get_entity_type(entity);
4635 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4638 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4639 ir_entity *entity, type_t *type)
4641 ir_node *memory = get_store();
4642 ir_node *nomem = new_NoMem();
4643 ir_node *frame = get_irg_frame(current_ir_graph);
4644 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4646 if (initializer->kind == INITIALIZER_VALUE) {
4647 initializer_value_t *initializer_value = &initializer->value;
4649 ir_node *value = expression_to_value(initializer_value->value);
4650 type = skip_typeref(type);
4651 assign_value(dbgi, addr, type, value);
4655 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4656 ir_initializer_t *irinitializer
4657 = create_ir_initializer(initializer, type);
4659 create_dynamic_initializer(irinitializer, dbgi, entity);
4663 /* create a "template" entity which is copied to the entity on the stack */
4664 ir_entity *const init_entity
4665 = create_initializer_entity(dbgi, initializer, type);
4666 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4667 ir_type *const irtype = get_ir_type(type);
4668 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4670 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4671 set_store(copyb_mem);
4674 static void create_initializer_local_variable_entity(entity_t *entity)
4676 assert(entity->kind == ENTITY_VARIABLE);
4677 initializer_t *initializer = entity->variable.initializer;
4678 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4679 ir_entity *irentity = entity->variable.v.entity;
4680 type_t *type = entity->declaration.type;
4682 create_local_initializer(initializer, dbgi, irentity, type);
4685 static void create_variable_initializer(entity_t *entity)
4687 assert(entity->kind == ENTITY_VARIABLE);
4688 initializer_t *initializer = entity->variable.initializer;
4689 if (initializer == NULL)
4692 declaration_kind_t declaration_kind
4693 = (declaration_kind_t) entity->declaration.kind;
4694 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4695 create_initializer_local_variable_entity(entity);
4699 type_t *type = entity->declaration.type;
4700 type_qualifiers_t tq = get_type_qualifier(type, true);
4702 if (initializer->kind == INITIALIZER_VALUE) {
4703 expression_t * value = initializer->value.value;
4704 type_t *const init_type = skip_typeref(value->base.type);
4706 if (is_type_complex(init_type)) {
4707 complex_value nodes = expression_to_complex(value);
4708 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4709 ir_mode *mode = get_complex_mode_storage(init_type);
4710 ir_node *real = create_conv(dbgi, nodes.real, mode);
4711 ir_node *imag = create_conv(dbgi, nodes.imag, mode);
4712 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4713 set_value(entity->variable.v.value_number, real);
4714 set_value(entity->variable.v.value_number+1, imag);
4716 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4717 ir_entity *irentity = entity->variable.v.entity;
4718 if (tq & TYPE_QUALIFIER_CONST
4719 && get_entity_owner(irentity) != get_tls_type()) {
4720 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4722 ir_initializer_t *initializer = create_initializer_compound(2);
4723 ir_initializer_t *reali = create_initializer_const(real);
4724 set_initializer_compound_value(initializer, 0, reali);
4725 ir_initializer_t *imagi = create_initializer_const(imag);
4726 set_initializer_compound_value(initializer, 1, imagi);
4727 set_entity_initializer(irentity, initializer);
4730 } else if (!is_type_scalar(init_type)) {
4731 if (value->kind != EXPR_COMPOUND_LITERAL)
4732 panic("expected non-scalar initializer to be a compound literal");
4733 initializer = value->compound_literal.initializer;
4734 goto have_initializer;
4737 ir_node * node = expression_to_value(value);
4738 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4739 node = conv_to_storage_type(dbgi, node, init_type);
4741 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4742 set_value(entity->variable.v.value_number, node);
4744 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4746 ir_entity *irentity = entity->variable.v.entity;
4748 if (tq & TYPE_QUALIFIER_CONST
4749 && get_entity_owner(irentity) != get_tls_type()) {
4750 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4752 set_atomic_ent_value(irentity, node);
4756 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4757 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4759 ir_entity *irentity = entity->variable.v.entity;
4760 ir_initializer_t *irinitializer
4761 = create_ir_initializer(initializer, type);
4763 if (tq & TYPE_QUALIFIER_CONST) {
4764 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4766 set_entity_initializer(irentity, irinitializer);
4770 static void create_variable_length_array(entity_t *entity)
4772 assert(entity->kind == ENTITY_VARIABLE);
4773 assert(entity->variable.initializer == NULL);
4775 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4776 entity->variable.v.vla_base = NULL;
4778 /* TODO: record VLA somewhere so we create the free node when we leave
4782 static void allocate_variable_length_array(entity_t *entity)
4784 assert(entity->kind == ENTITY_VARIABLE);
4785 assert(entity->variable.initializer == NULL);
4786 assert(currently_reachable());
4788 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4789 type_t *type = entity->declaration.type;
4790 ir_type *el_type = get_ir_type(type->array.element_type);
4792 /* make sure size_node is calculated */
4793 get_type_size_node(type);
4794 ir_node *elems = type->array.size_node;
4795 ir_node *mem = get_store();
4796 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4798 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4799 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4802 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4803 entity->variable.v.vla_base = addr;
4806 static bool var_needs_entity(variable_t const *const var)
4808 if (var->address_taken)
4810 type_t *const type = skip_typeref(var->base.type);
4811 return (!is_type_scalar(type) && !is_type_complex(type))
4812 || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4816 * Creates a Firm local variable from a declaration.
4818 static void create_local_variable(entity_t *entity)
4820 assert(entity->kind == ENTITY_VARIABLE);
4821 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4823 if (!var_needs_entity(&entity->variable)) {
4824 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4825 entity->variable.v.value_number = next_value_number_function;
4826 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4827 ++next_value_number_function;
4828 if (is_type_complex(skip_typeref(entity->declaration.type)))
4829 ++next_value_number_function;
4833 /* is it a variable length array? */
4834 type_t *const type = skip_typeref(entity->declaration.type);
4835 if (is_type_array(type) && !type->array.size_constant) {
4836 create_variable_length_array(entity);
4840 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4841 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4844 static void create_local_static_variable(entity_t *entity)
4846 assert(entity->kind == ENTITY_VARIABLE);
4847 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4849 type_t *type = skip_typeref(entity->declaration.type);
4850 ir_type *const var_type = entity->variable.thread_local ?
4851 get_tls_type() : get_glob_type();
4852 ir_type *const irtype = get_ir_type(type);
4853 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4855 size_t l = strlen(entity->base.symbol->string);
4856 char buf[l + sizeof(".%u")];
4857 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4858 ident *const id = id_unique(buf);
4859 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4861 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4862 set_entity_volatility(irentity, volatility_is_volatile);
4865 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4866 entity->variable.v.entity = irentity;
4868 set_entity_ld_ident(irentity, id);
4869 set_entity_visibility(irentity, ir_visibility_local);
4871 if (entity->variable.initializer == NULL) {
4872 ir_initializer_t *null_init = get_initializer_null();
4873 set_entity_initializer(irentity, null_init);
4876 PUSH_IRG(get_const_code_irg());
4877 create_variable_initializer(entity);
4881 static ir_node *return_statement_to_firm(return_statement_t *statement)
4883 if (!currently_reachable())
4886 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4887 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4891 if (is_type_void(type)) {
4892 /* just create the side effects, don't return anything */
4893 if (statement->value)
4894 evaluate_expression_discard_result(statement->value);
4897 } else if (is_type_complex(type)) {
4898 if (statement->value) {
4899 complex_value value = expression_to_complex(statement->value);
4900 in[0] = complex_to_memory(dbgi, type, value);
4902 in[0] = new_Unknown(mode_P_data);
4906 ir_mode *const mode = get_ir_mode_storage(type);
4907 if (statement->value) {
4908 ir_node *value = expression_to_value(statement->value);
4909 value = conv_to_storage_type(dbgi, value, type);
4910 in[0] = create_conv(dbgi, value, mode);
4912 in[0] = new_Unknown(mode);
4917 ir_node *const store = get_store();
4918 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4920 ir_node *end_block = get_irg_end_block(current_ir_graph);
4921 add_immBlock_pred(end_block, ret);
4923 set_unreachable_now();
4927 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4929 if (!currently_reachable())
4932 expression_t *expression = statement->expression;
4933 type_t *type = skip_typeref(expression->base.type);
4934 if (is_type_complex(type)) {
4935 expression_to_complex(expression);
4938 return expression_to_value(statement->expression);
4942 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4944 create_local_declarations(compound->scope.entities);
4946 ir_node *result = NULL;
4947 statement_t *statement = compound->statements;
4948 for ( ; statement != NULL; statement = statement->base.next) {
4949 result = statement_to_firm(statement);
4955 static void create_global_variable(entity_t *entity)
4957 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4958 ir_visibility visibility = ir_visibility_external;
4959 storage_class_tag_t storage
4960 = (storage_class_tag_t)entity->declaration.storage_class;
4961 decl_modifiers_t modifiers = entity->declaration.modifiers;
4962 assert(entity->kind == ENTITY_VARIABLE);
4965 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4966 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4967 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4968 case STORAGE_CLASS_TYPEDEF:
4969 case STORAGE_CLASS_AUTO:
4970 case STORAGE_CLASS_REGISTER:
4971 panic("invalid storage class for global var");
4974 /* "common" symbols */
4975 if (storage == STORAGE_CLASS_NONE
4976 && entity->variable.initializer == NULL
4977 && !entity->variable.thread_local
4978 && (modifiers & DM_WEAK) == 0) {
4979 linkage |= IR_LINKAGE_MERGE;
4982 ir_type *var_type = get_glob_type();
4983 if (entity->variable.thread_local) {
4984 var_type = get_tls_type();
4986 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4987 ir_entity *irentity = entity->variable.v.entity;
4988 add_entity_linkage(irentity, linkage);
4989 set_entity_visibility(irentity, visibility);
4990 if (entity->variable.initializer == NULL
4991 && storage != STORAGE_CLASS_EXTERN) {
4992 ir_initializer_t *null_init = get_initializer_null();
4993 set_entity_initializer(irentity, null_init);
4997 static void create_local_declaration(entity_t *entity)
4999 assert(is_declaration(entity));
5001 /* construct type */
5002 (void) get_ir_type(entity->declaration.type);
5003 if (entity->base.symbol == NULL) {
5007 switch ((storage_class_tag_t) entity->declaration.storage_class) {
5008 case STORAGE_CLASS_STATIC:
5009 if (entity->kind == ENTITY_FUNCTION) {
5010 (void)get_function_entity(entity, NULL);
5012 create_local_static_variable(entity);
5015 case STORAGE_CLASS_EXTERN:
5016 if (entity->kind == ENTITY_FUNCTION) {
5017 assert(entity->function.body == NULL);
5018 (void)get_function_entity(entity, NULL);
5020 create_global_variable(entity);
5021 create_variable_initializer(entity);
5024 case STORAGE_CLASS_NONE:
5025 case STORAGE_CLASS_AUTO:
5026 case STORAGE_CLASS_REGISTER:
5027 if (entity->kind == ENTITY_FUNCTION) {
5028 if (entity->function.body != NULL) {
5029 ir_type *owner = get_irg_frame_type(current_ir_graph);
5030 (void)get_function_entity(entity, owner);
5031 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5032 enqueue_inner_function(entity);
5034 (void)get_function_entity(entity, NULL);
5037 create_local_variable(entity);
5040 case STORAGE_CLASS_TYPEDEF:
5043 panic("invalid storage class");
5046 static void create_local_declarations(entity_t *e)
5048 for (; e; e = e->base.next) {
5049 if (is_declaration(e))
5050 create_local_declaration(e);
5054 static void initialize_local_declaration(entity_t *entity)
5056 if (entity->base.symbol == NULL)
5059 // no need to emit code in dead blocks
5060 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5061 && !currently_reachable())
5064 switch ((declaration_kind_t) entity->declaration.kind) {
5065 case DECLARATION_KIND_LOCAL_VARIABLE:
5066 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5067 create_variable_initializer(entity);
5070 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5071 allocate_variable_length_array(entity);
5074 case DECLARATION_KIND_COMPOUND_MEMBER:
5075 case DECLARATION_KIND_GLOBAL_VARIABLE:
5076 case DECLARATION_KIND_FUNCTION:
5077 case DECLARATION_KIND_INNER_FUNCTION:
5080 case DECLARATION_KIND_PARAMETER:
5081 case DECLARATION_KIND_PARAMETER_ENTITY:
5082 panic("can't initialize parameters");
5084 case DECLARATION_KIND_UNKNOWN:
5085 panic("can't initialize unknown declaration");
5087 panic("invalid declaration kind");
5090 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5092 entity_t *entity = statement->declarations_begin;
5096 entity_t *const last = statement->declarations_end;
5097 for ( ;; entity = entity->base.next) {
5098 if (is_declaration(entity)) {
5099 initialize_local_declaration(entity);
5100 } else if (entity->kind == ENTITY_TYPEDEF) {
5101 /* ยง6.7.7:3 Any array size expressions associated with variable length
5102 * array declarators are evaluated each time the declaration of the
5103 * typedef name is reached in the order of execution. */
5104 type_t *const type = skip_typeref(entity->typedefe.type);
5105 if (is_type_array(type) && type->array.is_vla)
5106 get_vla_size(&type->array);
5115 static ir_node *if_statement_to_firm(if_statement_t *statement)
5117 create_local_declarations(statement->scope.entities);
5119 /* Create the condition. */
5120 jump_target true_target;
5121 jump_target false_target;
5122 init_jump_target(&true_target, NULL);
5123 init_jump_target(&false_target, NULL);
5124 if (currently_reachable())
5125 expression_to_control_flow(statement->condition, &true_target, &false_target);
5127 jump_target exit_target;
5128 init_jump_target(&exit_target, NULL);
5130 /* Create the true statement. */
5131 enter_jump_target(&true_target);
5132 statement_to_firm(statement->true_statement);
5133 jump_to_target(&exit_target);
5135 /* Create the false statement. */
5136 enter_jump_target(&false_target);
5137 if (statement->false_statement)
5138 statement_to_firm(statement->false_statement);
5139 jump_to_target(&exit_target);
5141 enter_jump_target(&exit_target);
5145 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5147 create_local_declarations(statement->scope.entities);
5150 PUSH_CONTINUE(NULL);
5152 expression_t *const cond = statement->condition;
5153 /* Avoid an explicit body block in case of do ... while (0);. */
5154 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
5155 /* do ... while (0);. */
5156 statement_to_firm(statement->body);
5157 jump_to_target(&continue_target);
5158 enter_jump_target(&continue_target);
5159 jump_to_target(&break_target);
5161 jump_target body_target;
5162 init_jump_target(&body_target, NULL);
5163 jump_to_target(&body_target);
5164 enter_immature_jump_target(&body_target);
5166 statement_to_firm(statement->body);
5167 jump_to_target(&continue_target);
5168 if (enter_jump_target(&continue_target))
5169 expression_to_control_flow(statement->condition, &body_target, &break_target);
5170 enter_jump_target(&body_target);
5172 enter_jump_target(&break_target);
5179 static ir_node *for_statement_to_firm(for_statement_t *statement)
5181 create_local_declarations(statement->scope.entities);
5183 if (currently_reachable()) {
5184 entity_t *entity = statement->scope.entities;
5185 for ( ; entity != NULL; entity = entity->base.next) {
5186 if (!is_declaration(entity))
5189 initialize_local_declaration(entity);
5192 if (statement->initialisation != NULL) {
5193 expression_to_value(statement->initialisation);
5197 /* Create the header block */
5198 jump_target header_target;
5199 init_jump_target(&header_target, NULL);
5200 jump_to_target(&header_target);
5201 enter_immature_jump_target(&header_target);
5204 expression_t *const step = statement->step;
5206 PUSH_CONTINUE(step ? NULL : header_target.block);
5208 /* Create the condition. */
5209 expression_t *const cond = statement->condition;
5210 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
5211 jump_target body_target;
5212 init_jump_target(&body_target, NULL);
5213 expression_to_control_flow(cond, &body_target, &break_target);
5214 enter_jump_target(&body_target);
5217 /* Create the loop body. */
5218 statement_to_firm(statement->body);
5219 jump_to_target(&continue_target);
5221 /* Create the step code. */
5222 if (step && enter_jump_target(&continue_target)) {
5223 expression_to_value(step);
5224 jump_to_target(&header_target);
5227 enter_jump_target(&header_target);
5228 enter_jump_target(&break_target);
5235 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5237 /* determine number of cases */
5239 for (case_label_statement_t *l = statement->first_case; l != NULL;
5242 if (l->expression == NULL)
5244 if (l->is_empty_range)
5249 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5251 for (case_label_statement_t *l = statement->first_case; l != NULL;
5253 if (l->expression == NULL) {
5254 l->pn = pn_Switch_default;
5257 if (l->is_empty_range)
5259 ir_tarval *min = l->first_case;
5260 ir_tarval *max = l->last_case;
5261 long pn = (long) i+1;
5262 ir_switch_table_set(res, i++, min, max, pn);
5268 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5270 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5271 ir_node *switch_node = NULL;
5273 if (currently_reachable()) {
5274 ir_node *expression = expression_to_value(statement->expression);
5275 ir_switch_table *table = create_switch_table(statement);
5276 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5278 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5281 set_unreachable_now();
5284 ir_node *const old_switch = current_switch;
5285 const bool old_saw_default_label = saw_default_label;
5286 saw_default_label = false;
5287 current_switch = switch_node;
5289 statement_to_firm(statement->body);
5290 jump_to_target(&break_target);
5292 if (!saw_default_label && switch_node) {
5293 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5294 add_pred_to_jump_target(&break_target, proj);
5297 enter_jump_target(&break_target);
5299 assert(current_switch == switch_node);
5300 current_switch = old_switch;
5301 saw_default_label = old_saw_default_label;
5306 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5308 if (current_switch != NULL && !statement->is_empty_range) {
5309 jump_target case_target;
5310 init_jump_target(&case_target, NULL);
5312 /* Fallthrough from previous case */
5313 jump_to_target(&case_target);
5315 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5316 add_pred_to_jump_target(&case_target, proj);
5317 if (statement->expression == NULL)
5318 saw_default_label = true;
5320 enter_jump_target(&case_target);
5323 return statement_to_firm(statement->statement);
5326 static ir_node *label_to_firm(const label_statement_t *statement)
5328 label_t *const label = statement->label;
5329 prepare_label_target(label);
5330 jump_to_target(&label->target);
5331 if (--label->n_users == 0) {
5332 enter_jump_target(&label->target);
5334 enter_immature_jump_target(&label->target);
5338 return statement_to_firm(statement->statement);
5341 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5343 label_t *const label = stmt->label;
5344 prepare_label_target(label);
5345 jump_to_target(&label->target);
5346 if (--label->n_users == 0)
5347 enter_jump_target(&label->target);
5348 set_unreachable_now();
5352 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5354 if (currently_reachable()) {
5355 ir_node *const op = expression_to_value(statement->expression);
5356 ARR_APP1(ir_node*, ijmp_ops, op);
5357 jump_to_target(&ijmp_target);
5358 set_unreachable_now();
5363 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5365 bool needs_memory = statement->is_volatile;
5366 size_t n_clobbers = 0;
5367 asm_clobber_t *clobber = statement->clobbers;
5368 for ( ; clobber != NULL; clobber = clobber->next) {
5369 const char *clobber_str = clobber->clobber.begin;
5371 if (!be_is_valid_clobber(clobber_str)) {
5372 errorf(&statement->base.pos,
5373 "invalid clobber '%s' specified", clobber->clobber);
5377 if (streq(clobber_str, "memory")) {
5378 needs_memory = true;
5382 ident *id = new_id_from_str(clobber_str);
5383 obstack_ptr_grow(&asm_obst, id);
5386 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5387 ident **clobbers = NULL;
5388 if (n_clobbers > 0) {
5389 clobbers = obstack_finish(&asm_obst);
5392 size_t n_inputs = 0;
5393 asm_argument_t *argument = statement->inputs;
5394 for ( ; argument != NULL; argument = argument->next)
5396 size_t n_outputs = 0;
5397 argument = statement->outputs;
5398 for ( ; argument != NULL; argument = argument->next)
5401 unsigned next_pos = 0;
5403 ir_node *ins[n_inputs + n_outputs + 1];
5406 ir_asm_constraint tmp_in_constraints[n_outputs];
5408 const expression_t *out_exprs[n_outputs];
5409 ir_node *out_addrs[n_outputs];
5410 size_t out_size = 0;
5412 argument = statement->outputs;
5413 for ( ; argument != NULL; argument = argument->next) {
5414 const char *constraints = argument->constraints.begin;
5415 asm_constraint_flags_t asm_flags
5416 = be_parse_asm_constraints(constraints);
5419 position_t const *const pos = &statement->base.pos;
5420 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5421 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5423 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5424 errorf(pos, "some constraints in '%s' are invalid", constraints);
5427 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5428 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5433 unsigned pos = next_pos++;
5434 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5435 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5436 expression_t *expr = argument->expression;
5437 ir_node *addr = expression_to_addr(expr);
5438 /* in+output, construct an artifical same_as constraint on the
5440 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5442 ir_node *value = get_value_from_lvalue(expr, addr);
5444 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5446 ir_asm_constraint constraint;
5447 constraint.pos = pos;
5448 constraint.constraint = new_id_from_str(buf);
5449 constraint.mode = get_ir_mode_storage(expr->base.type);
5450 tmp_in_constraints[in_size] = constraint;
5451 ins[in_size] = value;
5456 out_exprs[out_size] = expr;
5457 out_addrs[out_size] = addr;
5459 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5460 /* pure memory ops need no input (but we have to make sure we
5461 * attach to the memory) */
5462 assert(! (asm_flags &
5463 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5464 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5465 needs_memory = true;
5467 /* we need to attach the address to the inputs */
5468 expression_t *expr = argument->expression;
5470 ir_asm_constraint constraint;
5471 constraint.pos = pos;
5472 constraint.constraint = new_id_from_str(constraints);
5473 constraint.mode = mode_M;
5474 tmp_in_constraints[in_size] = constraint;
5476 ins[in_size] = expression_to_addr(expr);
5480 errorf(&statement->base.pos,
5481 "only modifiers but no place set in constraints '%s'",
5486 ir_asm_constraint constraint;
5487 constraint.pos = pos;
5488 constraint.constraint = new_id_from_str(constraints);
5489 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5491 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5493 assert(obstack_object_size(&asm_obst)
5494 == out_size * sizeof(ir_asm_constraint));
5495 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5498 obstack_grow(&asm_obst, tmp_in_constraints,
5499 in_size * sizeof(tmp_in_constraints[0]));
5500 /* find and count input and output arguments */
5501 argument = statement->inputs;
5502 for ( ; argument != NULL; argument = argument->next) {
5503 const char *constraints = argument->constraints.begin;
5504 asm_constraint_flags_t asm_flags
5505 = be_parse_asm_constraints(constraints);
5507 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5508 errorf(&statement->base.pos,
5509 "some constraints in '%s' are not supported", constraints);
5512 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5513 errorf(&statement->base.pos,
5514 "some constraints in '%s' are invalid", constraints);
5517 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5518 errorf(&statement->base.pos,
5519 "write flag specified for input constraints '%s'",
5525 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5526 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5527 /* we can treat this as "normal" input */
5528 input = expression_to_value(argument->expression);
5529 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5530 /* pure memory ops need no input (but we have to make sure we
5531 * attach to the memory) */
5532 assert(! (asm_flags &
5533 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5534 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5535 needs_memory = true;
5536 input = expression_to_addr(argument->expression);
5538 errorf(&statement->base.pos,
5539 "only modifiers but no place set in constraints '%s'",
5544 ir_asm_constraint constraint;
5545 constraint.pos = next_pos++;
5546 constraint.constraint = new_id_from_str(constraints);
5547 constraint.mode = get_irn_mode(input);
5549 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5550 ins[in_size++] = input;
5553 ir_node *mem = needs_memory ? get_store() : new_NoMem();
5554 assert(obstack_object_size(&asm_obst)
5555 == in_size * sizeof(ir_asm_constraint));
5556 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5558 /* create asm node */
5559 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5561 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5563 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5564 out_size, output_constraints,
5565 n_clobbers, clobbers, asm_text);
5567 if (statement->is_volatile) {
5568 set_irn_pinned(node, op_pin_state_pinned);
5570 set_irn_pinned(node, op_pin_state_floats);
5573 /* create output projs & connect them */
5575 ir_node *projm = new_Proj(node, mode_M, out_size);
5580 for (i = 0; i < out_size; ++i) {
5581 const expression_t *out_expr = out_exprs[i];
5583 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5584 ir_node *proj = new_Proj(node, mode, pn);
5585 ir_node *addr = out_addrs[i];
5587 set_value_for_expression_addr(out_expr, proj, addr);
5593 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5595 statement_to_firm(statement->try_statement);
5596 position_t const *const pos = &statement->base.pos;
5597 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5601 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5603 errorf(&statement->base.pos, "__leave not supported yet");
5608 * Transform a statement.
5610 static ir_node *statement_to_firm(statement_t *const stmt)
5613 assert(!stmt->base.transformed);
5614 stmt->base.transformed = true;
5617 switch (stmt->kind) {
5618 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5619 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5620 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5621 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5622 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5623 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5624 case STATEMENT_EMPTY: return NULL; /* nothing */
5625 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5626 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5627 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
5628 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5629 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5630 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5631 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5632 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5633 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5637 case STATEMENT_BREAK: tgt = &break_target; goto jump;
5638 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5640 jump_to_target(tgt);
5641 set_unreachable_now();
5645 case STATEMENT_ERROR: panic("error statement");
5647 panic("statement not implemented");
5650 static int count_local_variables(const entity_t *entity,
5651 const entity_t *const last)
5654 entity_t const *const end = last != NULL ? last->base.next : NULL;
5655 for (; entity != end; entity = entity->base.next) {
5656 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5657 !var_needs_entity(&entity->variable)) {
5658 type_t *type = skip_typeref(entity->declaration.type);
5659 count += is_type_complex(type) ? 2 : 1;
5665 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5667 int *const count = env;
5669 switch (stmt->kind) {
5670 case STATEMENT_DECLARATION: {
5671 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5672 *count += count_local_variables(decl_stmt->declarations_begin,
5673 decl_stmt->declarations_end);
5678 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5687 * Return the number of local (alias free) variables used by a function.
5689 static int get_function_n_local_vars(entity_t *entity)
5691 const function_t *function = &entity->function;
5694 /* count parameters */
5695 count += count_local_variables(function->parameters.entities, NULL);
5697 /* count local variables declared in body */
5698 walk_statements(function->body, count_local_variables_in_stmt, &count);
5703 * Build Firm code for the parameters of a function.
5705 static void initialize_function_parameters(entity_t *entity)
5707 assert(entity->kind == ENTITY_FUNCTION);
5708 ir_graph *irg = current_ir_graph;
5709 ir_node *args = get_irg_args(irg);
5711 ir_type *function_irtype;
5713 if (entity->function.need_closure) {
5714 /* add an extra parameter for the static link */
5715 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5718 /* Matze: IMO this is wrong, nested functions should have an own
5719 * type and not rely on strange parameters... */
5720 function_irtype = create_method_type(&entity->declaration.type->function, true);
5722 function_irtype = get_ir_type(entity->declaration.type);
5725 entity_t *parameter = entity->function.parameters.entities;
5726 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5727 if (parameter->kind != ENTITY_PARAMETER)
5730 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5731 type_t *type = skip_typeref(parameter->declaration.type);
5733 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5734 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5735 if (var_needs_entity(¶meter->variable)) {
5736 ir_type *frame_type = get_irg_frame_type(irg);
5738 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5739 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5740 parameter->variable.v.entity = param;
5741 } else if (is_type_complex(type)) {
5742 ir_type *frame_type = get_irg_frame_type(irg);
5744 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5745 ir_node *nomem = get_irg_no_mem(irg);
5746 ir_node *frame = get_irg_frame(irg);
5747 ir_node *addr = new_simpleSel(nomem, frame, param);
5748 complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5750 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5751 parameter->variable.v.value_number = next_value_number_function;
5752 set_irg_loc_description(irg, next_value_number_function,
5754 set_irg_loc_description(irg, next_value_number_function+1,
5756 set_value(next_value_number_function, value.real);
5757 set_value(next_value_number_function+1, value.imag);
5758 next_value_number_function += 2;
5760 ir_mode *param_mode = get_type_mode(param_irtype);
5762 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5763 value = conv_to_storage_type(dbgi, value, type);
5765 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5766 parameter->variable.v.value_number = next_value_number_function;
5767 set_irg_loc_description(irg, next_value_number_function,
5769 ++next_value_number_function;
5771 set_value(parameter->variable.v.value_number, value);
5776 static void add_function_pointer(ir_type *segment, ir_entity *method,
5777 const char *unique_template)
5779 ir_type *method_type = get_entity_type(method);
5780 ir_type *ptr_type = new_type_pointer(method_type);
5782 /* these entities don't really have a name but firm only allows
5784 * Note that we mustn't give these entities a name since for example
5785 * Mach-O doesn't allow them. */
5786 ident *ide = id_unique(unique_template);
5787 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5788 ir_graph *irg = get_const_code_irg();
5789 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5792 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5793 set_entity_compiler_generated(ptr, 1);
5794 set_entity_visibility(ptr, ir_visibility_private);
5795 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5796 set_atomic_ent_value(ptr, val);
5800 * Create code for a function and all inner functions.
5802 * @param entity the function entity
5804 static void create_function(entity_t *entity)
5806 assert(entity->kind == ENTITY_FUNCTION);
5807 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5809 if (entity->function.body == NULL)
5812 inner_functions = NULL;
5813 current_trampolines = NULL;
5815 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5816 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5817 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5819 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5820 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5821 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5824 current_function_entity = entity;
5825 current_function_name = NULL;
5826 current_funcsig = NULL;
5829 assert(!ijmp_blocks);
5830 init_jump_target(&ijmp_target, NULL);
5831 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5832 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5834 int n_local_vars = get_function_n_local_vars(entity);
5835 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5836 current_ir_graph = irg;
5838 ir_graph *old_current_function = current_function;
5839 current_function = irg;
5841 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5842 current_vararg_entity = NULL;
5844 set_irg_fp_model(irg, firm_fp_model);
5845 set_irn_dbg_info(get_irg_start_block(irg),
5846 get_entity_dbg_info(function_entity));
5848 next_value_number_function = 0;
5849 initialize_function_parameters(entity);
5850 current_static_link = entity->function.static_link;
5852 statement_to_firm(entity->function.body);
5854 ir_node *end_block = get_irg_end_block(irg);
5856 /* do we have a return statement yet? */
5857 if (currently_reachable()) {
5858 type_t *type = skip_typeref(entity->declaration.type);
5859 assert(is_type_function(type));
5860 type_t *const return_type = skip_typeref(type->function.return_type);
5863 if (is_type_void(return_type)) {
5864 ret = new_Return(get_store(), 0, NULL);
5866 ir_mode *const mode = get_ir_mode_storage(return_type);
5869 /* ยง5.1.2.2.3 main implicitly returns 0 */
5870 if (is_main(entity)) {
5871 in[0] = new_Const(get_mode_null(mode));
5873 in[0] = new_Unknown(mode);
5875 ret = new_Return(get_store(), 1, in);
5877 add_immBlock_pred(end_block, ret);
5880 if (enter_jump_target(&ijmp_target)) {
5882 size_t const n = ARR_LEN(ijmp_ops);
5883 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5884 ir_node *const ijmp = new_IJmp(op);
5885 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5886 ir_node *const block = ijmp_blocks[i];
5887 add_immBlock_pred(block, ijmp);
5888 mature_immBlock(block);
5892 DEL_ARR_F(ijmp_ops);
5893 DEL_ARR_F(ijmp_blocks);
5897 irg_finalize_cons(irg);
5899 /* finalize the frame type */
5900 ir_type *frame_type = get_irg_frame_type(irg);
5901 int n = get_compound_n_members(frame_type);
5904 for (int i = 0; i < n; ++i) {
5905 ir_entity *member = get_compound_member(frame_type, i);
5906 ir_type *entity_type = get_entity_type(member);
5908 int align = get_type_alignment_bytes(entity_type);
5909 if (align > align_all)
5913 misalign = offset % align;
5915 offset += align - misalign;
5919 set_entity_offset(member, offset);
5920 offset += get_type_size_bytes(entity_type);
5922 set_type_size_bytes(frame_type, offset);
5923 set_type_alignment_bytes(frame_type, align_all);
5925 irg_verify(irg, VERIFY_ENFORCE_SSA);
5926 current_vararg_entity = old_current_vararg_entity;
5927 current_function = old_current_function;
5929 if (current_trampolines != NULL) {
5930 DEL_ARR_F(current_trampolines);
5931 current_trampolines = NULL;
5934 /* create inner functions if any */
5935 entity_t **inner = inner_functions;
5936 if (inner != NULL) {
5937 ir_type *rem_outer_frame = current_outer_frame;
5938 current_outer_frame = get_irg_frame_type(current_ir_graph);
5939 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5940 create_function(inner[i]);
5944 current_outer_frame = rem_outer_frame;
5948 static void scope_to_firm(scope_t *scope)
5950 /* first pass: create declarations */
5951 entity_t *entity = scope->entities;
5952 for ( ; entity != NULL; entity = entity->base.next) {
5953 if (entity->base.symbol == NULL)
5956 if (entity->kind == ENTITY_FUNCTION) {
5957 if (entity->function.btk != BUILTIN_NONE) {
5958 /* builtins have no representation */
5961 (void)get_function_entity(entity, NULL);
5962 } else if (entity->kind == ENTITY_VARIABLE) {
5963 create_global_variable(entity);
5964 } else if (entity->kind == ENTITY_NAMESPACE) {
5965 scope_to_firm(&entity->namespacee.members);
5969 /* second pass: create code/initializers */
5970 entity = scope->entities;
5971 for ( ; entity != NULL; entity = entity->base.next) {
5972 if (entity->base.symbol == NULL)
5975 if (entity->kind == ENTITY_FUNCTION) {
5976 if (entity->function.btk != BUILTIN_NONE) {
5977 /* builtins have no representation */
5980 create_function(entity);
5981 } else if (entity->kind == ENTITY_VARIABLE) {
5982 assert(entity->declaration.kind
5983 == DECLARATION_KIND_GLOBAL_VARIABLE);
5984 current_ir_graph = get_const_code_irg();
5985 create_variable_initializer(entity);
5990 void init_ast2firm(void)
5992 obstack_init(&asm_obst);
5993 init_atomic_modes();
5995 ir_set_debug_retrieve(dbg_retrieve);
5996 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5998 /* create idents for all known runtime functions */
5999 for (size_t i = 0; i < lengthof(rts_data); ++i) {
6000 rts_idents[i] = new_id_from_str(rts_data[i].name);
6003 entitymap_init(&entitymap);
6006 static void init_ir_types(void)
6008 static int ir_types_initialized = 0;
6009 if (ir_types_initialized)
6011 ir_types_initialized = 1;
6013 ir_type_char = get_ir_type(type_char);
6015 be_params = be_get_backend_param();
6016 mode_float_arithmetic = be_params->mode_float_arithmetic;
6018 stack_param_align = be_params->stack_param_align;
6021 void exit_ast2firm(void)
6023 entitymap_destroy(&entitymap);
6024 obstack_free(&asm_obst, NULL);
6027 static void global_asm_to_firm(statement_t *s)
6029 for (; s != NULL; s = s->base.next) {
6030 assert(s->kind == STATEMENT_ASM);
6032 char const *const text = s->asms.asm_text.begin;
6033 size_t const size = s->asms.asm_text.size;
6034 ident *const id = new_id_from_chars(text, size);
6039 static const char *get_cwd(void)
6041 static char buf[1024];
6042 if (buf[0] == '\0') {
6043 return getcwd(buf, sizeof(buf));
6048 void translation_unit_to_firm(translation_unit_t *unit)
6050 if (c_mode & _CXX) {
6051 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6052 } else if (c_mode & _C99) {
6053 be_dwarf_set_source_language(DW_LANG_C99);
6054 } else if (c_mode & _C89) {
6055 be_dwarf_set_source_language(DW_LANG_C89);
6057 be_dwarf_set_source_language(DW_LANG_C);
6059 const char *cwd = get_cwd();
6061 be_dwarf_set_compilation_directory(cwd);
6064 /* initialize firm arithmetic */
6065 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6066 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6068 /* just to be sure */
6069 init_jump_target(&break_target, NULL);
6070 init_jump_target(&continue_target, NULL);
6071 current_switch = NULL;
6072 current_translation_unit = unit;
6076 scope_to_firm(&unit->scope);
6077 global_asm_to_firm(unit->global_asm);
6079 current_ir_graph = NULL;
6080 current_translation_unit = NULL;