2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
44 #include "diagnostic.h"
45 #include "lang_features.h"
47 #include "type_hash.h"
52 #include "entitymap_t.h"
53 #include "driver/firm_opt.h"
55 typedef struct trampoline_region trampoline_region;
56 struct trampoline_region {
57 ir_entity *function; /**< The function that is called by this trampoline */
58 ir_entity *region; /**< created region for the trampoline */
61 fp_model_t firm_fp_model = fp_model_precise;
63 static const backend_params *be_params;
65 static ir_type *ir_type_char;
66 static ir_type *ir_type_wchar_t;
68 /* architecture specific floating point arithmetic mode (if any) */
69 static ir_mode *mode_float_arithmetic;
71 /* alignment of stack parameters */
72 static unsigned stack_param_align;
74 static int next_value_number_function;
75 static ir_node *continue_label;
76 static ir_node *break_label;
77 static ir_node *current_switch;
78 static bool saw_default_label;
79 static label_t **all_labels;
80 static entity_t **inner_functions;
81 static ir_node *ijmp_list;
82 static bool constant_folding;
84 static const entity_t *current_function_entity;
85 static ir_node *current_function_name;
86 static ir_node *current_funcsig;
87 static ir_graph *current_function;
88 static translation_unit_t *current_translation_unit;
89 static trampoline_region *current_trampolines;
90 static ir_type *current_outer_frame;
91 static ir_node *current_static_link;
92 static ir_entity *current_vararg_entity;
94 static entitymap_t entitymap;
96 static struct obstack asm_obst;
98 typedef enum declaration_kind_t {
99 DECLARATION_KIND_UNKNOWN,
100 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
101 DECLARATION_KIND_GLOBAL_VARIABLE,
102 DECLARATION_KIND_LOCAL_VARIABLE,
103 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
104 DECLARATION_KIND_PARAMETER,
105 DECLARATION_KIND_PARAMETER_ENTITY,
106 DECLARATION_KIND_FUNCTION,
107 DECLARATION_KIND_COMPOUND_MEMBER,
108 DECLARATION_KIND_INNER_FUNCTION
109 } declaration_kind_t;
111 static ir_type *get_ir_type_incomplete(type_t *type);
113 static void enqueue_inner_function(entity_t *entity)
115 if (inner_functions == NULL)
116 inner_functions = NEW_ARR_F(entity_t *, 0);
117 ARR_APP1(entity_t*, inner_functions, entity);
120 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
122 const entity_t *entity = get_irg_loc_description(irg, pos);
124 if (entity != NULL) {
125 source_position_t const *const pos = &entity->base.source_position;
126 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
128 return new_r_Unknown(irg, mode);
131 static src_loc_t dbg_retrieve(const dbg_info *dbg)
133 source_position_t const *const pos = (source_position_t const*)dbg;
135 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
137 return (src_loc_t){ NULL, 0, 0 };
141 static dbg_info *get_dbg_info(const source_position_t *pos)
143 return (dbg_info*) pos;
146 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
147 const type_dbg_info *dbg)
150 print_to_buffer(buffer, buffer_size);
151 const type_t *type = (const type_t*) dbg;
153 finish_print_to_buffer();
156 static type_dbg_info *get_type_dbg_info_(const type_t *type)
158 return (type_dbg_info*) type;
161 /* is the current block a reachable one? */
162 static bool currently_reachable(void)
164 ir_node *const block = get_cur_block();
165 return block != NULL && !is_Bad(block);
168 static void set_unreachable_now(void)
173 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
175 static ir_node *_expression_to_firm(const expression_t *expression);
176 static ir_node *expression_to_firm(const expression_t *expression);
178 static unsigned decide_modulo_shift(unsigned type_size)
180 if (architecture_modulo_shift == 0)
182 if (type_size < architecture_modulo_shift)
183 return architecture_modulo_shift;
187 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
189 unsigned flags = get_atomic_type_flags(kind);
190 unsigned size = get_atomic_type_size(kind);
191 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
192 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
194 case 4: return get_modeF();
195 case 8: return get_modeD();
196 default: panic("unexpected kind");
198 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
200 unsigned bit_size = size * 8;
201 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
202 unsigned modulo_shift = decide_modulo_shift(bit_size);
204 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
205 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
213 * Initialises the atomic modes depending on the machine size.
215 static void init_atomic_modes(void)
217 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
218 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
219 if (atomic_modes[i] != NULL)
221 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
225 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
227 assert(kind <= ATOMIC_TYPE_LAST);
228 return atomic_modes[kind];
231 static ir_node *get_vla_size(array_type_t *const type)
233 ir_node *size_node = type->size_node;
234 if (size_node == NULL) {
235 size_node = expression_to_firm(type->size_expression);
236 type->size_node = size_node;
241 static unsigned count_parameters(const function_type_t *function_type)
245 function_parameter_t *parameter = function_type->parameters;
246 for ( ; parameter != NULL; parameter = parameter->next) {
254 * Creates a Firm type for an atomic type
256 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
258 ir_mode *mode = atomic_modes[akind];
259 type_dbg_info *dbgi = get_type_dbg_info_(type);
260 ir_type *irtype = new_d_type_primitive(mode, dbgi);
261 il_alignment_t alignment = get_atomic_type_alignment(akind);
263 set_type_size_bytes(irtype, get_atomic_type_size(akind));
264 set_type_alignment_bytes(irtype, alignment);
270 * Creates a Firm type for a complex type
272 static ir_type *create_complex_type(const atomic_type_t *type)
274 atomic_type_kind_t kind = type->akind;
275 ir_mode *mode = atomic_modes[kind];
276 ident *id = get_mode_ident(mode);
280 /* FIXME: finish the array */
285 * Creates a Firm type for an imaginary type
287 static ir_type *create_imaginary_type(const atomic_type_t *type)
289 return create_atomic_type(type->akind, (const type_t*)type);
293 * return type of a parameter (and take transparent union gnu extension into
296 static type_t *get_parameter_type(type_t *orig_type)
298 type_t *type = skip_typeref(orig_type);
299 if (is_type_union(type)
300 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
301 compound_t *compound = type->compound.compound;
302 type = compound->members.entities->declaration.type;
308 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
310 type_t *return_type = skip_typeref(function_type->return_type);
312 int n_parameters = count_parameters(function_type)
313 + (for_closure ? 1 : 0);
314 int n_results = is_type_void(return_type) ? 0 : 1;
315 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
316 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
318 if (!is_type_void(return_type)) {
319 ir_type *restype = get_ir_type(return_type);
320 set_method_res_type(irtype, 0, restype);
323 function_parameter_t *parameter = function_type->parameters;
326 ir_type *p_irtype = get_ir_type(type_void_ptr);
327 set_method_param_type(irtype, n, p_irtype);
330 for ( ; parameter != NULL; parameter = parameter->next) {
331 type_t *type = get_parameter_type(parameter->type);
332 ir_type *p_irtype = get_ir_type(type);
333 set_method_param_type(irtype, n, p_irtype);
337 bool is_variadic = function_type->variadic;
340 set_method_variadicity(irtype, variadicity_variadic);
342 unsigned cc = get_method_calling_convention(irtype);
343 switch (function_type->calling_convention) {
344 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
347 set_method_calling_convention(irtype, SET_CDECL(cc));
354 /* only non-variadic function can use stdcall, else use cdecl */
355 set_method_calling_convention(irtype, SET_STDCALL(cc));
361 /* only non-variadic function can use fastcall, else use cdecl */
362 set_method_calling_convention(irtype, SET_FASTCALL(cc));
366 /* Hmm, leave default, not accepted by the parser yet. */
371 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
373 const decl_modifiers_t modifiers = function_type->modifiers;
374 if (modifiers & DM_CONST)
375 add_method_additional_properties(irtype, mtp_property_const);
376 if (modifiers & DM_PURE)
377 add_method_additional_properties(irtype, mtp_property_pure);
378 if (modifiers & DM_RETURNS_TWICE)
379 add_method_additional_properties(irtype, mtp_property_returns_twice);
380 if (modifiers & DM_NORETURN)
381 add_method_additional_properties(irtype, mtp_property_noreturn);
382 if (modifiers & DM_NOTHROW)
383 add_method_additional_properties(irtype, mtp_property_nothrow);
384 if (modifiers & DM_MALLOC)
385 add_method_additional_properties(irtype, mtp_property_malloc);
390 static ir_type *create_pointer_type(pointer_type_t *type)
392 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
393 type_t *points_to = type->points_to;
394 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
395 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
400 static ir_type *create_reference_type(reference_type_t *type)
402 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
403 type_t *refers_to = type->refers_to;
404 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
405 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
410 static ir_type *create_array_type(array_type_t *type)
412 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
413 type_t *element_type = type->element_type;
414 ir_type *ir_element_type = get_ir_type(element_type);
415 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
417 const int align = get_type_alignment_bytes(ir_element_type);
418 set_type_alignment_bytes(irtype, align);
420 if (type->size_constant) {
421 int n_elements = type->size;
423 set_array_bounds_int(irtype, 0, 0, n_elements);
425 size_t elemsize = get_type_size_bytes(ir_element_type);
426 if (elemsize % align > 0) {
427 elemsize += align - (elemsize % align);
429 set_type_size_bytes(irtype, n_elements * elemsize);
431 set_array_lower_bound_int(irtype, 0, 0);
433 set_type_state(irtype, layout_fixed);
439 * Return the signed integer type of size bits.
441 * @param size the size
443 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
447 static ir_mode *s_modes[64 + 1] = {NULL, };
451 if (size <= 0 || size > 64)
454 mode = s_modes[size];
458 snprintf(name, sizeof(name), "bf_I%u", size);
459 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
460 s_modes[size] = mode;
463 type_dbg_info *dbgi = get_type_dbg_info_(type);
464 res = new_d_type_primitive(mode, dbgi);
465 set_primitive_base_type(res, base_tp);
471 * Return the unsigned integer type of size bits.
473 * @param size the size
475 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
479 static ir_mode *u_modes[64 + 1] = {NULL, };
483 if (size <= 0 || size > 64)
486 mode = u_modes[size];
490 snprintf(name, sizeof(name), "bf_U%u", size);
491 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
492 u_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);
502 static ir_type *create_bitfield_type(const entity_t *entity)
504 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
505 type_t *base = skip_typeref(entity->declaration.type);
506 assert(is_type_integer(base));
507 ir_type *irbase = get_ir_type(base);
509 unsigned bit_size = entity->compound_member.bit_size;
511 if (is_type_signed(base)) {
512 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
514 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
519 * Construct firm type from ast struct type.
521 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
523 compound_t *compound = type->compound;
525 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
526 return compound->irtype;
529 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
531 symbol_t *type_symbol = compound->base.symbol;
533 if (type_symbol != NULL) {
534 id = new_id_from_str(type_symbol->string);
537 id = id_unique("__anonymous_union.%u");
539 id = id_unique("__anonymous_struct.%u");
545 irtype = new_type_union(id);
547 irtype = new_type_struct(id);
550 compound->irtype_complete = false;
551 compound->irtype = irtype;
557 layout_union_type(type);
559 layout_struct_type(type);
562 compound->irtype_complete = true;
564 entity_t *entry = compound->members.entities;
565 for ( ; entry != NULL; entry = entry->base.next) {
566 if (entry->kind != ENTITY_COMPOUND_MEMBER)
569 symbol_t *symbol = entry->base.symbol;
570 type_t *entry_type = entry->declaration.type;
572 if (symbol == NULL) {
573 /* anonymous bitfield member, skip */
574 if (entry->compound_member.bitfield)
576 assert(is_type_compound(entry_type));
577 ident = id_unique("anon.%u");
579 ident = new_id_from_str(symbol->string);
582 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
584 ir_type *entry_irtype;
585 if (entry->compound_member.bitfield) {
586 entry_irtype = create_bitfield_type(entry);
588 entry_irtype = get_ir_type(entry_type);
590 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
592 set_entity_offset(entity, entry->compound_member.offset);
593 set_entity_offset_bits_remainder(entity,
594 entry->compound_member.bit_offset);
596 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
597 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
598 entry->compound_member.entity = entity;
601 set_type_alignment_bytes(irtype, compound->alignment);
602 set_type_size_bytes(irtype, compound->size);
603 set_type_state(irtype, layout_fixed);
608 static ir_tarval *fold_constant_to_tarval(expression_t const *);
610 static void determine_enum_values(enum_type_t *const type)
612 ir_mode *const mode = atomic_modes[type->base.akind];
613 ir_tarval *const one = get_mode_one(mode);
614 ir_tarval * tv_next = get_mode_null(mode);
616 enum_t *enume = type->enume;
617 entity_t *entry = enume->base.next;
618 for (; entry != NULL; entry = entry->base.next) {
619 if (entry->kind != ENTITY_ENUM_VALUE)
622 expression_t *const init = entry->enum_value.value;
624 tv_next = fold_constant_to_tarval(init);
626 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
627 entry->enum_value.tv = tv_next;
628 tv_next = tarval_add(tv_next, one);
632 static ir_type *create_enum_type(enum_type_t *const type)
634 return create_atomic_type(type->base.akind, (const type_t*) type);
637 static ir_type *get_ir_type_incomplete(type_t *type)
639 type = skip_typeref(type);
641 if (type->base.firm_type != NULL) {
642 return type->base.firm_type;
645 if (is_type_compound(type)) {
646 return create_compound_type(&type->compound, true);
648 return get_ir_type(type);
652 ir_type *get_ir_type(type_t *type)
654 type = skip_typeref(type);
656 if (type->base.firm_type != NULL) {
657 return type->base.firm_type;
660 ir_type *firm_type = NULL;
661 switch (type->kind) {
663 firm_type = create_atomic_type(type->atomic.akind, type);
666 firm_type = create_complex_type(&type->atomic);
669 firm_type = create_imaginary_type(&type->atomic);
672 firm_type = create_method_type(&type->function, false);
675 firm_type = create_pointer_type(&type->pointer);
678 firm_type = create_reference_type(&type->reference);
681 firm_type = create_array_type(&type->array);
683 case TYPE_COMPOUND_STRUCT:
684 case TYPE_COMPOUND_UNION:
685 firm_type = create_compound_type(&type->compound, false);
688 firm_type = create_enum_type(&type->enumt);
696 if (firm_type == NULL)
697 panic("unknown type found");
699 type->base.firm_type = firm_type;
703 static ir_mode *get_ir_mode_storage(type_t *type)
705 type = skip_typeref(type);
707 /* Firm doesn't report a mode for arrays and structs/unions. */
708 if (!is_type_scalar(type)) {
712 ir_type *const irtype = get_ir_type(type);
713 ir_mode *const mode = get_type_mode(irtype);
714 assert(mode != NULL);
719 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
720 * int that it returns bigger modes for floating point on some platforms
721 * (x87 internally does arithemtic with 80bits)
723 static ir_mode *get_ir_mode_arithmetic(type_t *type)
725 ir_mode *mode = get_ir_mode_storage(type);
726 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
727 return mode_float_arithmetic;
734 * Return a node representing the size of a type.
736 static ir_node *get_type_size_node(type_t *type)
739 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
740 type = skip_typeref(type);
742 if (is_type_array(type) && type->array.is_vla) {
743 ir_node *size_node = get_vla_size(&type->array);
744 ir_node *elem_size = get_type_size_node(type->array.element_type);
745 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
749 size = get_type_size(type);
750 return new_Const_long(mode, size);
753 /** Names of the runtime functions. */
754 static const struct {
755 int id; /**< the rts id */
756 int n_res; /**< number of return values */
757 const char *name; /**< the name of the rts function */
758 int n_params; /**< number of parameters */
759 unsigned flags; /**< language flags */
761 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
762 { rts_abort, 0, "abort", 0, _C89 },
763 { rts_alloca, 1, "alloca", 1, _ALL },
764 { rts_abs, 1, "abs", 1, _C89 },
765 { rts_labs, 1, "labs", 1, _C89 },
766 { rts_llabs, 1, "llabs", 1, _C99 },
767 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
769 { rts_fabs, 1, "fabs", 1, _C89 },
770 { rts_sqrt, 1, "sqrt", 1, _C89 },
771 { rts_cbrt, 1, "cbrt", 1, _C99 },
772 { rts_exp, 1, "exp", 1, _C89 },
773 { rts_exp2, 1, "exp2", 1, _C89 },
774 { rts_exp10, 1, "exp10", 1, _GNUC },
775 { rts_log, 1, "log", 1, _C89 },
776 { rts_log2, 1, "log2", 1, _C89 },
777 { rts_log10, 1, "log10", 1, _C89 },
778 { rts_pow, 1, "pow", 2, _C89 },
779 { rts_sin, 1, "sin", 1, _C89 },
780 { rts_cos, 1, "cos", 1, _C89 },
781 { rts_tan, 1, "tan", 1, _C89 },
782 { rts_asin, 1, "asin", 1, _C89 },
783 { rts_acos, 1, "acos", 1, _C89 },
784 { rts_atan, 1, "atan", 1, _C89 },
785 { rts_sinh, 1, "sinh", 1, _C89 },
786 { rts_cosh, 1, "cosh", 1, _C89 },
787 { rts_tanh, 1, "tanh", 1, _C89 },
789 { rts_fabsf, 1, "fabsf", 1, _C99 },
790 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
791 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
792 { rts_expf, 1, "expf", 1, _C99 },
793 { rts_exp2f, 1, "exp2f", 1, _C99 },
794 { rts_exp10f, 1, "exp10f", 1, _GNUC },
795 { rts_logf, 1, "logf", 1, _C99 },
796 { rts_log2f, 1, "log2f", 1, _C99 },
797 { rts_log10f, 1, "log10f", 1, _C99 },
798 { rts_powf, 1, "powf", 2, _C99 },
799 { rts_sinf, 1, "sinf", 1, _C99 },
800 { rts_cosf, 1, "cosf", 1, _C99 },
801 { rts_tanf, 1, "tanf", 1, _C99 },
802 { rts_asinf, 1, "asinf", 1, _C99 },
803 { rts_acosf, 1, "acosf", 1, _C99 },
804 { rts_atanf, 1, "atanf", 1, _C99 },
805 { rts_sinhf, 1, "sinhf", 1, _C99 },
806 { rts_coshf, 1, "coshf", 1, _C99 },
807 { rts_tanhf, 1, "tanhf", 1, _C99 },
809 { rts_fabsl, 1, "fabsl", 1, _C99 },
810 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
811 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
812 { rts_expl, 1, "expl", 1, _C99 },
813 { rts_exp2l, 1, "exp2l", 1, _C99 },
814 { rts_exp10l, 1, "exp10l", 1, _GNUC },
815 { rts_logl, 1, "logl", 1, _C99 },
816 { rts_log2l, 1, "log2l", 1, _C99 },
817 { rts_log10l, 1, "log10l", 1, _C99 },
818 { rts_powl, 1, "powl", 2, _C99 },
819 { rts_sinl, 1, "sinl", 1, _C99 },
820 { rts_cosl, 1, "cosl", 1, _C99 },
821 { rts_tanl, 1, "tanl", 1, _C99 },
822 { rts_asinl, 1, "asinl", 1, _C99 },
823 { rts_acosl, 1, "acosl", 1, _C99 },
824 { rts_atanl, 1, "atanl", 1, _C99 },
825 { rts_sinhl, 1, "sinhl", 1, _C99 },
826 { rts_coshl, 1, "coshl", 1, _C99 },
827 { rts_tanhl, 1, "tanhl", 1, _C99 },
829 { rts_strcmp, 1, "strcmp", 2, _C89 },
830 { rts_strncmp, 1, "strncmp", 3, _C89 },
831 { rts_strcpy, 1, "strcpy", 2, _C89 },
832 { rts_strlen, 1, "strlen", 1, _C89 },
833 { rts_memcpy, 1, "memcpy", 3, _C89 },
834 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
835 { rts_memmove, 1, "memmove", 3, _C89 },
836 { rts_memset, 1, "memset", 3, _C89 },
837 { rts_memcmp, 1, "memcmp", 3, _C89 },
840 static ident *rts_idents[lengthof(rts_data)];
842 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
844 void set_create_ld_ident(ident *(*func)(entity_t*))
846 create_ld_ident = func;
849 static bool declaration_is_definition(const entity_t *entity)
851 switch (entity->kind) {
852 case ENTITY_VARIABLE:
853 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
854 case ENTITY_FUNCTION:
855 return entity->function.body != NULL;
856 case ENTITY_PARAMETER:
857 case ENTITY_COMPOUND_MEMBER:
861 case ENTITY_ENUM_VALUE:
862 case ENTITY_NAMESPACE:
864 case ENTITY_LOCAL_LABEL:
867 panic("declaration_is_definition called on non-declaration");
871 * Handle GNU attributes for entities
873 * @param ent the entity
874 * @param decl the routine declaration
876 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
878 assert(is_declaration(entity));
879 decl_modifiers_t modifiers = entity->declaration.modifiers;
881 if (is_method_entity(irentity)) {
882 if (modifiers & DM_PURE) {
883 set_entity_additional_properties(irentity, mtp_property_pure);
885 if (modifiers & DM_CONST) {
886 add_entity_additional_properties(irentity, mtp_property_const);
889 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
890 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
892 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
893 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
894 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
898 static bool is_main(entity_t *entity)
900 static symbol_t *sym_main = NULL;
901 if (sym_main == NULL) {
902 sym_main = symbol_table_insert("main");
905 if (entity->base.symbol != sym_main)
907 /* must be in outermost scope */
908 if (entity->base.parent_scope != ¤t_translation_unit->scope)
915 * Creates an entity representing a function.
917 * @param entity the function declaration/definition
918 * @param owner_type the owner type of this function, NULL
919 * for global functions
921 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
923 assert(entity->kind == ENTITY_FUNCTION);
924 if (entity->function.irentity != NULL)
925 return entity->function.irentity;
927 switch (entity->function.btk) {
930 case BUILTIN_LIBC_CHECK:
936 symbol_t *symbol = entity->base.symbol;
937 ident *id = new_id_from_str(symbol->string);
939 /* already an entity defined? */
940 ir_entity *irentity = entitymap_get(&entitymap, symbol);
941 bool const has_body = entity->function.body != NULL;
942 if (irentity != NULL) {
946 ir_type *ir_type_method;
947 if (entity->function.need_closure)
948 ir_type_method = create_method_type(&entity->declaration.type->function, true);
950 ir_type_method = get_ir_type(entity->declaration.type);
952 bool nested_function = false;
953 if (owner_type == NULL)
954 owner_type = get_glob_type();
956 nested_function = true;
958 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
959 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
963 ld_id = id_unique("inner.%u");
965 ld_id = create_ld_ident(entity);
966 set_entity_ld_ident(irentity, ld_id);
968 handle_decl_modifiers(irentity, entity);
970 if (! nested_function) {
971 storage_class_tag_t const storage_class
972 = (storage_class_tag_t) entity->declaration.storage_class;
973 if (storage_class == STORAGE_CLASS_STATIC) {
974 set_entity_visibility(irentity, ir_visibility_local);
976 set_entity_visibility(irentity, ir_visibility_external);
979 bool const is_inline = entity->function.is_inline;
980 if (is_inline && has_body) {
981 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
982 || ((c_mode & _C99) == 0
983 && storage_class == STORAGE_CLASS_EXTERN)) {
984 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
988 /* nested functions are always local */
989 set_entity_visibility(irentity, ir_visibility_local);
992 /* We should check for file scope here, but as long as we compile C only
993 this is not needed. */
994 if (!freestanding && !has_body) {
995 /* check for a known runtime function */
996 for (size_t i = 0; i < lengthof(rts_data); ++i) {
997 if (id != rts_idents[i])
1000 function_type_t *function_type
1001 = &entity->declaration.type->function;
1002 /* rts_entities code can't handle a "wrong" number of parameters */
1003 if (function_type->unspecified_parameters)
1006 /* check number of parameters */
1007 int n_params = count_parameters(function_type);
1008 if (n_params != rts_data[i].n_params)
1011 type_t *return_type = skip_typeref(function_type->return_type);
1012 int n_res = is_type_void(return_type) ? 0 : 1;
1013 if (n_res != rts_data[i].n_res)
1016 /* ignore those rts functions not necessary needed for current mode */
1017 if ((c_mode & rts_data[i].flags) == 0)
1019 assert(rts_entities[rts_data[i].id] == NULL);
1020 rts_entities[rts_data[i].id] = irentity;
1024 entitymap_insert(&entitymap, symbol, irentity);
1027 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1028 entity->function.irentity = irentity;
1034 * Creates a SymConst for a given entity.
1036 * @param dbgi debug info
1037 * @param entity the entity
1039 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1041 assert(entity != NULL);
1042 union symconst_symbol sym;
1043 sym.entity_p = entity;
1044 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1047 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1049 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1052 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1055 if (is_Const(value)) {
1056 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1059 ir_node *cond = new_d_Cond(dbgi, value);
1060 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1061 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1062 ir_node *tblock = new_Block(1, &proj_true);
1063 ir_node *fblock = new_Block(1, &proj_false);
1064 set_cur_block(tblock);
1065 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1066 ir_node *tjump = new_Jmp();
1067 set_cur_block(fblock);
1068 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1069 ir_node *fjump = new_Jmp();
1071 ir_node *in[2] = { tjump, fjump };
1072 ir_node *mergeblock = new_Block(2, in);
1073 set_cur_block(mergeblock);
1074 ir_node *phi_in[2] = { const1, const0 };
1075 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1079 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1081 ir_mode *value_mode = get_irn_mode(value);
1083 if (value_mode == dest_mode)
1086 if (dest_mode == mode_b) {
1087 ir_node *zero = new_Const(get_mode_null(value_mode));
1088 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1090 } else if (value_mode == mode_b) {
1091 return create_conv_from_b(dbgi, value, dest_mode);
1094 return new_d_Conv(dbgi, value, dest_mode);
1098 * Creates a SymConst node representing a string constant.
1100 * @param src_pos the source position of the string constant
1101 * @param id_prefix a prefix for the name of the generated string constant
1102 * @param value the value of the string constant
1104 static ir_node *string_to_firm(source_position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1106 size_t const slen = get_string_len(value) + 1;
1107 ir_initializer_t *const initializer = create_initializer_compound(slen);
1108 ir_type * elem_type;
1109 switch (value->encoding) {
1110 case STRING_ENCODING_CHAR: {
1111 elem_type = ir_type_char;
1113 ir_mode *const mode = get_type_mode(elem_type);
1114 char const *p = value->begin;
1115 for (size_t i = 0; i < slen; ++i) {
1116 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1117 ir_initializer_t *val = create_initializer_tarval(tv);
1118 set_initializer_compound_value(initializer, i, val);
1123 case STRING_ENCODING_WIDE: {
1124 elem_type = ir_type_wchar_t;
1126 ir_mode *const mode = get_type_mode(elem_type);
1127 char const *p = value->begin;
1128 for (size_t i = 0; i < slen; ++i) {
1129 assert(p <= value->begin + value->size);
1130 utf32 v = read_utf8_char(&p);
1131 ir_tarval *tv = new_tarval_from_long(v, mode);
1132 ir_initializer_t *val = create_initializer_tarval(tv);
1133 set_initializer_compound_value(initializer, i, val);
1138 panic("invalid string encoding");
1141 ir_type *const type = new_type_array(1, elem_type);
1142 set_array_bounds_int(type, 0, 0, slen);
1143 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1144 set_type_state( type, layout_fixed);
1146 ir_type *const global_type = get_glob_type();
1147 ident *const id = id_unique(id_prefix);
1148 dbg_info *const dbgi = get_dbg_info(src_pos);
1149 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1150 set_entity_ld_ident( entity, id);
1151 set_entity_visibility( entity, ir_visibility_private);
1152 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1153 set_entity_initializer(entity, initializer);
1155 return create_symconst(dbgi, entity);
1158 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1160 assert(type->kind == TYPE_ATOMIC);
1161 atomic_type_kind_t akind = type->atomic.akind;
1163 ir_mode *const mode = atomic_modes[akind];
1164 char const *const str = literal->value.begin;
1165 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1166 if (tv == tarval_bad)
1169 literal->base.type = type;
1170 literal->target_value = tv;
1174 void determine_literal_type(literal_expression_t *const literal)
1176 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1178 /* -1: signed only, 0: any, 1: unsigned only */
1180 !is_type_signed(literal->base.type) ? 1 :
1181 literal->value.begin[0] == '0' ? 0 :
1182 -1; /* Decimal literals only try signed types. */
1184 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1185 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1187 if (try_create_integer(literal, literal->base.type))
1190 /* now try if the constant is small enough for some types */
1191 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1193 if (sign <= 0 && try_create_integer(literal, type_long))
1195 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1197 /* last try? then we should not report tarval_bad */
1199 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1200 if (sign <= 0 && try_create_integer(literal, type_long_long))
1205 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1206 bool res = try_create_integer(literal, type_unsigned_long_long);
1208 panic("internal error when parsing number literal");
1211 tarval_set_integer_overflow_mode(old_mode);
1215 * Creates a Const node representing a constant.
1217 static ir_node *literal_to_firm(const literal_expression_t *literal)
1219 type_t *type = skip_typeref(literal->base.type);
1220 ir_mode *mode = get_ir_mode_storage(type);
1221 const char *string = literal->value.begin;
1222 size_t size = literal->value.size;
1225 switch (literal->base.kind) {
1226 case EXPR_LITERAL_INTEGER:
1227 assert(literal->target_value != NULL);
1228 tv = literal->target_value;
1231 case EXPR_LITERAL_FLOATINGPOINT:
1232 tv = new_tarval_from_str(string, size, mode);
1235 case EXPR_LITERAL_BOOLEAN:
1236 if (string[0] == 't') {
1237 tv = get_mode_one(mode);
1239 assert(string[0] == 'f');
1240 case EXPR_LITERAL_MS_NOOP:
1241 tv = get_mode_null(mode);
1246 panic("Invalid literal kind found");
1249 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1250 ir_node *res = new_d_Const(dbgi, tv);
1251 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1252 return create_conv(dbgi, res, mode_arith);
1256 * Creates a Const node representing a character constant.
1258 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1260 type_t *type = skip_typeref(literal->base.type);
1261 ir_mode *mode = get_ir_mode_storage(type);
1262 const char *string = literal->value.begin;
1263 size_t size = literal->value.size;
1266 switch (literal->value.encoding) {
1267 case STRING_ENCODING_WIDE: {
1268 utf32 v = read_utf8_char(&string);
1270 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1272 tv = new_tarval_from_str(buf, len, mode);
1276 case STRING_ENCODING_CHAR: {
1279 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1280 if (size == 1 && char_is_signed) {
1281 v = (signed char)string[0];
1284 for (size_t i = 0; i < size; ++i) {
1285 v = (v << 8) | ((unsigned char)string[i]);
1289 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1291 tv = new_tarval_from_str(buf, len, mode);
1296 panic("Invalid literal kind found");
1299 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1300 ir_node *res = new_d_Const(dbgi, tv);
1301 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1302 return create_conv(dbgi, res, mode_arith);
1306 * Allocate an area of size bytes aligned at alignment
1309 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1311 static unsigned area_cnt = 0;
1314 ir_type *tp = new_type_array(1, ir_type_char);
1315 set_array_bounds_int(tp, 0, 0, size);
1316 set_type_alignment_bytes(tp, alignment);
1318 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1319 ident *name = new_id_from_str(buf);
1320 ir_entity *area = new_entity(frame_type, name, tp);
1322 /* mark this entity as compiler generated */
1323 set_entity_compiler_generated(area, 1);
1328 * Return a node representing a trampoline region
1329 * for a given function entity.
1331 * @param dbgi debug info
1332 * @param entity the function entity
1334 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1336 ir_entity *region = NULL;
1339 if (current_trampolines != NULL) {
1340 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1341 if (current_trampolines[i].function == entity) {
1342 region = current_trampolines[i].region;
1347 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1349 ir_graph *irg = current_ir_graph;
1350 if (region == NULL) {
1351 /* create a new region */
1352 ir_type *frame_tp = get_irg_frame_type(irg);
1353 trampoline_region reg;
1354 reg.function = entity;
1356 reg.region = alloc_trampoline(frame_tp,
1357 be_params->trampoline_size,
1358 be_params->trampoline_align);
1359 ARR_APP1(trampoline_region, current_trampolines, reg);
1360 region = reg.region;
1362 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1367 * Creates a trampoline for a function represented by an entity.
1369 * @param dbgi debug info
1370 * @param mode the (reference) mode for the function address
1371 * @param entity the function entity
1373 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1376 assert(entity != NULL);
1378 in[0] = get_trampoline_region(dbgi, entity);
1379 in[1] = create_symconst(dbgi, entity);
1380 in[2] = get_irg_frame(current_ir_graph);
1382 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1383 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1384 return new_Proj(irn, mode, pn_Builtin_max+1);
1388 * Dereference an address.
1390 * @param dbgi debug info
1391 * @param type the type of the dereferenced result (the points_to type)
1392 * @param addr the address to dereference
1394 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1395 ir_node *const addr)
1397 type_t *skipped = skip_typeref(type);
1398 if (is_type_incomplete(skipped))
1401 ir_type *irtype = get_ir_type(skipped);
1402 if (is_compound_type(irtype)
1403 || is_Method_type(irtype)
1404 || is_Array_type(irtype)) {
1408 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1409 ? cons_volatile : cons_none;
1410 ir_mode *const mode = get_type_mode(irtype);
1411 ir_node *const memory = get_store();
1412 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1413 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1414 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1416 set_store(load_mem);
1418 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1419 return create_conv(dbgi, load_res, mode_arithmetic);
1423 * Returns the correct base address depending on whether it is a parameter or a
1424 * normal local variable.
1426 static ir_node *get_local_frame(ir_entity *const ent)
1428 ir_graph *const irg = current_ir_graph;
1429 const ir_type *const owner = get_entity_owner(ent);
1430 if (owner == current_outer_frame) {
1431 assert(current_static_link != NULL);
1432 return current_static_link;
1434 return get_irg_frame(irg);
1439 * Keep all memory edges of the given block.
1441 static void keep_all_memory(ir_node *block)
1443 ir_node *old = get_cur_block();
1445 set_cur_block(block);
1446 keep_alive(get_store());
1447 /* TODO: keep all memory edges from restricted pointers */
1451 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1453 entity_t *entity = ref->entity;
1454 if (entity->enum_value.tv == NULL) {
1455 type_t *type = skip_typeref(entity->enum_value.enum_type);
1456 assert(type->kind == TYPE_ENUM);
1457 determine_enum_values(&type->enumt);
1460 return new_Const(entity->enum_value.tv);
1463 static ir_node *reference_addr(const reference_expression_t *ref)
1465 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1466 entity_t *entity = ref->entity;
1467 assert(is_declaration(entity));
1469 if (entity->kind == ENTITY_FUNCTION
1470 && entity->function.btk != BUILTIN_NONE) {
1471 ir_entity *irentity = get_function_entity(entity, NULL);
1472 /* for gcc compatibility we have to produce (dummy) addresses for some
1473 * builtins which don't have entities */
1474 if (irentity == NULL) {
1475 source_position_t const *const pos = &ref->base.source_position;
1476 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1478 /* simply create a NULL pointer */
1479 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1480 ir_node *res = new_Const(get_mode_null(mode));
1486 switch((declaration_kind_t) entity->declaration.kind) {
1487 case DECLARATION_KIND_UNKNOWN:
1489 case DECLARATION_KIND_PARAMETER:
1490 case DECLARATION_KIND_LOCAL_VARIABLE:
1491 /* you can store to a local variable (so we don't panic but return NULL
1492 * as an indicator for no real address) */
1494 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1495 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1499 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1500 case DECLARATION_KIND_PARAMETER_ENTITY: {
1501 ir_entity *irentity = entity->variable.v.entity;
1502 ir_node *frame = get_local_frame(irentity);
1503 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1507 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1508 return entity->variable.v.vla_base;
1510 case DECLARATION_KIND_FUNCTION: {
1511 return create_symconst(dbgi, entity->function.irentity);
1514 case DECLARATION_KIND_INNER_FUNCTION: {
1515 type_t *const type = skip_typeref(entity->declaration.type);
1516 ir_mode *const mode = get_ir_mode_storage(type);
1517 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1518 /* inner function not using the closure */
1519 return create_symconst(dbgi, entity->function.irentity);
1521 /* need trampoline here */
1522 return create_trampoline(dbgi, mode, entity->function.irentity);
1526 case DECLARATION_KIND_COMPOUND_MEMBER:
1527 panic("not implemented reference type");
1530 panic("reference to declaration with unknown type found");
1533 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1535 dbg_info *const dbgi = get_dbg_info(&ref->base.source_position);
1536 entity_t *const entity = ref->entity;
1537 assert(is_declaration(entity));
1539 switch ((declaration_kind_t)entity->declaration.kind) {
1540 case DECLARATION_KIND_LOCAL_VARIABLE:
1541 case DECLARATION_KIND_PARAMETER: {
1542 type_t *const type = skip_typeref(entity->declaration.type);
1543 ir_mode *const mode = get_ir_mode_storage(type);
1544 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1545 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1549 ir_node *const addr = reference_addr(ref);
1550 return deref_address(dbgi, entity->declaration.type, addr);
1556 * Transform calls to builtin functions.
1558 static ir_node *process_builtin_call(const call_expression_t *call)
1560 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1562 assert(call->function->kind == EXPR_REFERENCE);
1563 reference_expression_t *builtin = &call->function->reference;
1565 type_t *expr_type = skip_typeref(builtin->base.type);
1566 assert(is_type_pointer(expr_type));
1568 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1570 switch (builtin->entity->function.btk) {
1573 case BUILTIN_ALLOCA: {
1574 expression_t *argument = call->arguments->expression;
1575 ir_node *size = expression_to_firm(argument);
1577 ir_node *store = get_store();
1578 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1580 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1582 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1587 type_t *type = function_type->function.return_type;
1588 ir_mode *mode = get_ir_mode_arithmetic(type);
1589 ir_tarval *tv = get_mode_infinite(mode);
1590 ir_node *res = new_d_Const(dbgi, tv);
1594 /* Ignore string for now... */
1595 assert(is_type_function(function_type));
1596 type_t *type = function_type->function.return_type;
1597 ir_mode *mode = get_ir_mode_arithmetic(type);
1598 ir_tarval *tv = get_mode_NAN(mode);
1599 ir_node *res = new_d_Const(dbgi, tv);
1602 case BUILTIN_EXPECT: {
1603 expression_t *argument = call->arguments->expression;
1604 return _expression_to_firm(argument);
1606 case BUILTIN_VA_END:
1607 /* evaluate the argument of va_end for its side effects */
1608 _expression_to_firm(call->arguments->expression);
1610 case BUILTIN_OBJECT_SIZE: {
1611 /* determine value of "type" */
1612 expression_t *type_expression = call->arguments->next->expression;
1613 long type_val = fold_constant_to_int(type_expression);
1614 type_t *type = function_type->function.return_type;
1615 ir_mode *mode = get_ir_mode_arithmetic(type);
1616 /* just produce a "I don't know" result */
1617 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1618 get_mode_minus_one(mode);
1620 return new_d_Const(dbgi, result);
1622 case BUILTIN_ROTL: {
1623 ir_node *val = expression_to_firm(call->arguments->expression);
1624 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1625 ir_mode *mode = get_irn_mode(val);
1626 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1627 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1629 case BUILTIN_ROTR: {
1630 ir_node *val = expression_to_firm(call->arguments->expression);
1631 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1632 ir_mode *mode = get_irn_mode(val);
1633 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1634 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1635 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1636 return new_d_Rotl(dbgi, val, sub, mode);
1641 case BUILTIN_LIBC_CHECK:
1642 panic("builtin did not produce an entity");
1644 panic("invalid builtin found");
1648 * Transform a call expression.
1649 * Handles some special cases, like alloca() calls, which must be resolved
1650 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1651 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1654 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1656 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1657 assert(currently_reachable());
1659 expression_t *function = call->function;
1660 ir_node *callee = NULL;
1661 bool firm_builtin = false;
1662 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1663 if (function->kind == EXPR_REFERENCE) {
1664 const reference_expression_t *ref = &function->reference;
1665 entity_t *entity = ref->entity;
1667 if (entity->kind == ENTITY_FUNCTION) {
1668 builtin_kind_t builtin = entity->function.btk;
1669 if (builtin == BUILTIN_FIRM) {
1670 firm_builtin = true;
1671 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1672 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1673 && builtin != BUILTIN_LIBC_CHECK) {
1674 return process_builtin_call(call);
1679 callee = expression_to_firm(function);
1681 type_t *type = skip_typeref(function->base.type);
1682 assert(is_type_pointer(type));
1683 pointer_type_t *pointer_type = &type->pointer;
1684 type_t *points_to = skip_typeref(pointer_type->points_to);
1685 assert(is_type_function(points_to));
1686 function_type_t *function_type = &points_to->function;
1688 int n_parameters = 0;
1689 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1690 ir_type *new_method_type = NULL;
1691 if (function_type->variadic || function_type->unspecified_parameters) {
1692 const call_argument_t *argument = call->arguments;
1693 for ( ; argument != NULL; argument = argument->next) {
1697 /* we need to construct a new method type matching the call
1699 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1700 int n_res = get_method_n_ress(ir_method_type);
1701 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1702 set_method_calling_convention(new_method_type,
1703 get_method_calling_convention(ir_method_type));
1704 set_method_additional_properties(new_method_type,
1705 get_method_additional_properties(ir_method_type));
1706 set_method_variadicity(new_method_type,
1707 get_method_variadicity(ir_method_type));
1709 for (int i = 0; i < n_res; ++i) {
1710 set_method_res_type(new_method_type, i,
1711 get_method_res_type(ir_method_type, i));
1713 argument = call->arguments;
1714 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1715 expression_t *expression = argument->expression;
1716 ir_type *irtype = get_ir_type(expression->base.type);
1717 set_method_param_type(new_method_type, i, irtype);
1719 ir_method_type = new_method_type;
1721 n_parameters = get_method_n_params(ir_method_type);
1724 ir_node *in[n_parameters];
1726 const call_argument_t *argument = call->arguments;
1727 for (int n = 0; n < n_parameters; ++n) {
1728 expression_t *expression = argument->expression;
1729 ir_node *arg_node = expression_to_firm(expression);
1731 type_t *arg_type = skip_typeref(expression->base.type);
1732 if (!is_type_compound(arg_type)) {
1733 ir_mode *const mode = get_ir_mode_storage(arg_type);
1734 arg_node = create_conv(dbgi, arg_node, mode);
1739 argument = argument->next;
1743 if (function_type->modifiers & DM_CONST) {
1744 store = get_irg_no_mem(current_ir_graph);
1746 store = get_store();
1750 type_t *return_type = skip_typeref(function_type->return_type);
1751 ir_node *result = NULL;
1753 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1755 if (! (function_type->modifiers & DM_CONST)) {
1756 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1760 if (!is_type_void(return_type)) {
1761 assert(is_type_scalar(return_type));
1762 ir_mode *mode = get_ir_mode_storage(return_type);
1763 result = new_Proj(node, mode, pn_Builtin_max+1);
1764 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1765 result = create_conv(NULL, result, mode_arith);
1768 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1769 if (! (function_type->modifiers & DM_CONST)) {
1770 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1774 if (!is_type_void(return_type)) {
1775 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1776 ir_mode *const mode = get_ir_mode_storage(return_type);
1777 result = new_Proj(resproj, mode, 0);
1778 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1779 result = create_conv(NULL, result, mode_arith);
1783 if (function_type->modifiers & DM_NORETURN) {
1784 /* A dead end: Keep the Call and the Block. Also place all further
1785 * nodes into a new and unreachable block. */
1787 keep_alive(get_cur_block());
1788 ir_node *block = new_Block(0, NULL);
1789 set_cur_block(block);
1795 static ir_node *statement_to_firm(statement_t *statement);
1796 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1798 static ir_node *expression_to_addr(const expression_t *expression);
1799 static ir_node *create_condition_evaluation(const expression_t *expression,
1800 ir_node *true_block,
1801 ir_node *false_block);
1803 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1806 if (!is_type_compound(type)) {
1807 ir_mode *mode = get_ir_mode_storage(type);
1808 value = create_conv(dbgi, value, mode);
1811 ir_node *memory = get_store();
1813 if (is_type_scalar(type)) {
1814 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1815 ? cons_volatile : cons_none;
1816 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1817 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1818 set_store(store_mem);
1820 ir_type *irtype = get_ir_type(type);
1821 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1822 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1823 set_store(copyb_mem);
1827 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1829 ir_tarval *all_one = get_mode_all_one(mode);
1830 int mode_size = get_mode_size_bits(mode);
1831 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1833 assert(offset >= 0);
1835 assert(offset + size <= mode_size);
1836 if (size == mode_size) {
1840 long shiftr = get_mode_size_bits(mode) - size;
1841 long shiftl = offset;
1842 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1843 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1844 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1845 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1850 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1851 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1854 ir_type *entity_type = get_entity_type(entity);
1855 ir_type *base_type = get_primitive_base_type(entity_type);
1856 ir_mode *mode = get_type_mode(base_type);
1857 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1859 value = create_conv(dbgi, value, mode);
1861 /* kill upper bits of value and shift to right position */
1862 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1863 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1864 unsigned base_bits = get_mode_size_bits(mode);
1865 unsigned shiftwidth = base_bits - bitsize;
1867 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1868 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1870 unsigned shrwidth = base_bits - bitsize - bitoffset;
1871 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1872 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1874 /* load current value */
1875 ir_node *mem = get_store();
1876 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1877 set_volatile ? cons_volatile : cons_none);
1878 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1879 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1880 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1881 ir_tarval *inv_mask = tarval_not(shift_mask);
1882 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1883 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1885 /* construct new value and store */
1886 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1887 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1888 set_volatile ? cons_volatile : cons_none);
1889 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1890 set_store(store_mem);
1896 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1897 if (mode_is_signed(mode)) {
1898 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1900 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1905 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1908 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1909 entity_t *entity = expression->compound_entry;
1910 type_t *base_type = entity->declaration.type;
1911 ir_mode *mode = get_ir_mode_storage(base_type);
1912 ir_node *mem = get_store();
1913 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1914 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1915 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1916 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1918 ir_mode *amode = mode;
1919 /* optimisation, since shifting in modes < machine_size is usually
1921 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1924 unsigned amode_size = get_mode_size_bits(amode);
1925 load_res = create_conv(dbgi, load_res, amode);
1927 set_store(load_mem);
1929 /* kill upper bits */
1930 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1931 unsigned bitoffset = entity->compound_member.bit_offset;
1932 unsigned bitsize = entity->compound_member.bit_size;
1933 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1934 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1935 ir_node *countl = new_d_Const(dbgi, tvl);
1936 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1938 unsigned shift_bitsr = bitoffset + shift_bitsl;
1939 assert(shift_bitsr <= amode_size);
1940 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1941 ir_node *countr = new_d_Const(dbgi, tvr);
1943 if (mode_is_signed(mode)) {
1944 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1946 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1949 type_t *type = expression->base.type;
1950 ir_mode *resmode = get_ir_mode_arithmetic(type);
1951 return create_conv(dbgi, shiftr, resmode);
1954 /* make sure the selected compound type is constructed */
1955 static void construct_select_compound(const select_expression_t *expression)
1957 type_t *type = skip_typeref(expression->compound->base.type);
1958 if (is_type_pointer(type)) {
1959 type = type->pointer.points_to;
1961 (void) get_ir_type(type);
1964 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1965 ir_node *value, ir_node *addr)
1967 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1968 type_t *type = skip_typeref(expression->base.type);
1970 if (!is_type_compound(type)) {
1971 ir_mode *mode = get_ir_mode_storage(type);
1972 value = create_conv(dbgi, value, mode);
1975 if (expression->kind == EXPR_REFERENCE) {
1976 const reference_expression_t *ref = &expression->reference;
1978 entity_t *entity = ref->entity;
1979 assert(is_declaration(entity));
1980 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1981 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1982 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1983 set_value(entity->variable.v.value_number, value);
1989 addr = expression_to_addr(expression);
1990 assert(addr != NULL);
1992 if (expression->kind == EXPR_SELECT) {
1993 const select_expression_t *select = &expression->select;
1995 construct_select_compound(select);
1997 entity_t *entity = select->compound_entry;
1998 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1999 if (entity->compound_member.bitfield) {
2000 ir_entity *irentity = entity->compound_member.entity;
2002 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2003 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2004 set_volatile, true);
2009 assign_value(dbgi, addr, type, value);
2013 static void set_value_for_expression(const expression_t *expression,
2016 set_value_for_expression_addr(expression, value, NULL);
2019 static ir_node *get_value_from_lvalue(const expression_t *expression,
2022 if (expression->kind == EXPR_REFERENCE) {
2023 const reference_expression_t *ref = &expression->reference;
2025 entity_t *entity = ref->entity;
2026 assert(entity->kind == ENTITY_VARIABLE
2027 || entity->kind == ENTITY_PARAMETER);
2028 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2030 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2031 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2032 value_number = entity->variable.v.value_number;
2033 assert(addr == NULL);
2034 type_t *type = skip_typeref(expression->base.type);
2035 ir_mode *mode = get_ir_mode_storage(type);
2036 ir_node *res = get_value(value_number, mode);
2037 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2041 assert(addr != NULL);
2042 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2045 if (expression->kind == EXPR_SELECT &&
2046 expression->select.compound_entry->compound_member.bitfield) {
2047 construct_select_compound(&expression->select);
2048 value = bitfield_extract_to_firm(&expression->select, addr);
2050 value = deref_address(dbgi, expression->base.type, addr);
2057 static ir_node *create_incdec(const unary_expression_t *expression)
2059 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2060 const expression_t *value_expr = expression->value;
2061 ir_node *addr = expression_to_addr(value_expr);
2062 ir_node *value = get_value_from_lvalue(value_expr, addr);
2064 type_t *type = skip_typeref(expression->base.type);
2065 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2068 if (is_type_pointer(type)) {
2069 pointer_type_t *pointer_type = &type->pointer;
2070 offset = get_type_size_node(pointer_type->points_to);
2072 assert(is_type_arithmetic(type));
2073 offset = new_Const(get_mode_one(mode));
2077 ir_node *store_value;
2078 switch(expression->base.kind) {
2079 case EXPR_UNARY_POSTFIX_INCREMENT:
2081 store_value = new_d_Add(dbgi, value, offset, mode);
2083 case EXPR_UNARY_POSTFIX_DECREMENT:
2085 store_value = new_d_Sub(dbgi, value, offset, mode);
2087 case EXPR_UNARY_PREFIX_INCREMENT:
2088 result = new_d_Add(dbgi, value, offset, mode);
2089 store_value = result;
2091 case EXPR_UNARY_PREFIX_DECREMENT:
2092 result = new_d_Sub(dbgi, value, offset, mode);
2093 store_value = result;
2096 panic("no incdec expr in create_incdec");
2099 set_value_for_expression_addr(value_expr, store_value, addr);
2104 static bool is_local_variable(expression_t *expression)
2106 if (expression->kind != EXPR_REFERENCE)
2108 reference_expression_t *ref_expr = &expression->reference;
2109 entity_t *entity = ref_expr->entity;
2110 if (entity->kind != ENTITY_VARIABLE)
2112 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2113 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2116 static ir_relation get_relation(const expression_kind_t kind)
2119 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2120 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2121 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2122 case EXPR_BINARY_ISLESS:
2123 case EXPR_BINARY_LESS: return ir_relation_less;
2124 case EXPR_BINARY_ISLESSEQUAL:
2125 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2126 case EXPR_BINARY_ISGREATER:
2127 case EXPR_BINARY_GREATER: return ir_relation_greater;
2128 case EXPR_BINARY_ISGREATEREQUAL:
2129 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2130 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2135 panic("trying to get ir_relation from non-comparison binexpr type");
2139 * Handle the assume optimizer hint: check if a Confirm
2140 * node can be created.
2142 * @param dbi debug info
2143 * @param expr the IL assume expression
2145 * we support here only some simple cases:
2150 static ir_node *handle_assume_compare(dbg_info *dbi,
2151 const binary_expression_t *expression)
2153 expression_t *op1 = expression->left;
2154 expression_t *op2 = expression->right;
2155 entity_t *var2, *var = NULL;
2156 ir_node *res = NULL;
2157 ir_relation relation = get_relation(expression->base.kind);
2159 if (is_local_variable(op1) && is_local_variable(op2)) {
2160 var = op1->reference.entity;
2161 var2 = op2->reference.entity;
2163 type_t *const type = skip_typeref(var->declaration.type);
2164 ir_mode *const mode = get_ir_mode_storage(type);
2166 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2167 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2169 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2170 set_value(var2->variable.v.value_number, res);
2172 res = new_d_Confirm(dbi, irn1, irn2, relation);
2173 set_value(var->variable.v.value_number, res);
2178 expression_t *con = NULL;
2179 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2180 var = op1->reference.entity;
2182 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2183 relation = get_inversed_relation(relation);
2184 var = op2->reference.entity;
2189 type_t *const type = skip_typeref(var->declaration.type);
2190 ir_mode *const mode = get_ir_mode_storage(type);
2192 res = get_value(var->variable.v.value_number, mode);
2193 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2194 set_value(var->variable.v.value_number, res);
2200 * Handle the assume optimizer hint.
2202 * @param dbi debug info
2203 * @param expr the IL assume expression
2205 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2207 switch(expression->kind) {
2208 case EXPR_BINARY_EQUAL:
2209 case EXPR_BINARY_NOTEQUAL:
2210 case EXPR_BINARY_LESS:
2211 case EXPR_BINARY_LESSEQUAL:
2212 case EXPR_BINARY_GREATER:
2213 case EXPR_BINARY_GREATEREQUAL:
2214 return handle_assume_compare(dbi, &expression->binary);
2220 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2221 type_t *from_type, type_t *type)
2223 type = skip_typeref(type);
2224 if (is_type_void(type)) {
2225 /* make sure firm type is constructed */
2226 (void) get_ir_type(type);
2229 if (!is_type_scalar(type)) {
2230 /* make sure firm type is constructed */
2231 (void) get_ir_type(type);
2235 from_type = skip_typeref(from_type);
2236 ir_mode *mode = get_ir_mode_storage(type);
2237 /* check for conversion from / to __based types */
2238 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2239 const variable_t *from_var = from_type->pointer.base_variable;
2240 const variable_t *to_var = type->pointer.base_variable;
2241 if (from_var != to_var) {
2242 if (from_var != NULL) {
2243 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2244 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2245 value_node = new_d_Add(dbgi, value_node, base, mode);
2247 if (to_var != NULL) {
2248 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2249 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2250 value_node = new_d_Sub(dbgi, value_node, base, mode);
2255 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2256 /* bool adjustments (we save a mode_Bu, but have to temporarily
2257 * convert to mode_b so we only get a 0/1 value */
2258 value_node = create_conv(dbgi, value_node, mode_b);
2261 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2262 ir_node *node = create_conv(dbgi, value_node, mode);
2263 node = create_conv(dbgi, node, mode_arith);
2268 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2270 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2271 type_t *type = skip_typeref(expression->base.type);
2273 const expression_t *value = expression->value;
2275 switch(expression->base.kind) {
2276 case EXPR_UNARY_TAKE_ADDRESS:
2277 return expression_to_addr(value);
2279 case EXPR_UNARY_NEGATE: {
2280 ir_node *value_node = expression_to_firm(value);
2281 ir_mode *mode = get_ir_mode_arithmetic(type);
2282 return new_d_Minus(dbgi, value_node, mode);
2284 case EXPR_UNARY_PLUS:
2285 return expression_to_firm(value);
2286 case EXPR_UNARY_BITWISE_NEGATE: {
2287 ir_node *value_node = expression_to_firm(value);
2288 ir_mode *mode = get_ir_mode_arithmetic(type);
2289 return new_d_Not(dbgi, value_node, mode);
2291 case EXPR_UNARY_NOT: {
2292 ir_node *value_node = _expression_to_firm(value);
2293 value_node = create_conv(dbgi, value_node, mode_b);
2294 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2297 case EXPR_UNARY_DEREFERENCE: {
2298 ir_node *value_node = expression_to_firm(value);
2299 type_t *value_type = skip_typeref(value->base.type);
2300 assert(is_type_pointer(value_type));
2302 /* check for __based */
2303 const variable_t *const base_var = value_type->pointer.base_variable;
2304 if (base_var != NULL) {
2305 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2306 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2307 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2309 type_t *points_to = value_type->pointer.points_to;
2310 return deref_address(dbgi, points_to, value_node);
2312 case EXPR_UNARY_POSTFIX_INCREMENT:
2313 case EXPR_UNARY_POSTFIX_DECREMENT:
2314 case EXPR_UNARY_PREFIX_INCREMENT:
2315 case EXPR_UNARY_PREFIX_DECREMENT:
2316 return create_incdec(expression);
2317 case EXPR_UNARY_CAST: {
2318 ir_node *value_node = expression_to_firm(value);
2319 type_t *from_type = value->base.type;
2320 return create_cast(dbgi, value_node, from_type, type);
2322 case EXPR_UNARY_ASSUME:
2323 return handle_assume(dbgi, value);
2328 panic("invalid UNEXPR type found");
2332 * produces a 0/1 depending of the value of a mode_b node
2334 static ir_node *produce_condition_result(const expression_t *expression,
2335 ir_mode *mode, dbg_info *dbgi)
2337 ir_node *const one_block = new_immBlock();
2338 ir_node *const zero_block = new_immBlock();
2339 create_condition_evaluation(expression, one_block, zero_block);
2340 mature_immBlock(one_block);
2341 mature_immBlock(zero_block);
2343 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2344 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2345 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2346 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2347 set_cur_block(block);
2349 ir_node *const one = new_Const(get_mode_one(mode));
2350 ir_node *const zero = new_Const(get_mode_null(mode));
2351 ir_node *const in[2] = { one, zero };
2352 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2357 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2358 ir_node *value, type_t *type)
2360 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2361 assert(is_type_pointer(type));
2362 pointer_type_t *const pointer_type = &type->pointer;
2363 type_t *const points_to = skip_typeref(pointer_type->points_to);
2364 ir_node * elem_size = get_type_size_node(points_to);
2365 elem_size = create_conv(dbgi, elem_size, mode);
2366 value = create_conv(dbgi, value, mode);
2367 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2371 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2372 ir_node *left, ir_node *right)
2375 type_t *type_left = skip_typeref(expression->left->base.type);
2376 type_t *type_right = skip_typeref(expression->right->base.type);
2378 expression_kind_t kind = expression->base.kind;
2381 case EXPR_BINARY_SHIFTLEFT:
2382 case EXPR_BINARY_SHIFTRIGHT:
2383 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2384 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2385 mode = get_ir_mode_arithmetic(expression->base.type);
2386 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2389 case EXPR_BINARY_SUB:
2390 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2391 const pointer_type_t *const ptr_type = &type_left->pointer;
2393 mode = get_ir_mode_arithmetic(expression->base.type);
2394 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2395 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2396 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2397 ir_node *const no_mem = new_NoMem();
2398 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2399 mode, op_pin_state_floats);
2400 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2403 case EXPR_BINARY_SUB_ASSIGN:
2404 if (is_type_pointer(type_left)) {
2405 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2406 mode = get_ir_mode_arithmetic(type_left);
2411 case EXPR_BINARY_ADD:
2412 case EXPR_BINARY_ADD_ASSIGN:
2413 if (is_type_pointer(type_left)) {
2414 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2415 mode = get_ir_mode_arithmetic(type_left);
2417 } else if (is_type_pointer(type_right)) {
2418 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2419 mode = get_ir_mode_arithmetic(type_right);
2426 mode = get_ir_mode_arithmetic(type_right);
2427 left = create_conv(dbgi, left, mode);
2432 case EXPR_BINARY_ADD_ASSIGN:
2433 case EXPR_BINARY_ADD:
2434 return new_d_Add(dbgi, left, right, mode);
2435 case EXPR_BINARY_SUB_ASSIGN:
2436 case EXPR_BINARY_SUB:
2437 return new_d_Sub(dbgi, left, right, mode);
2438 case EXPR_BINARY_MUL_ASSIGN:
2439 case EXPR_BINARY_MUL:
2440 return new_d_Mul(dbgi, left, right, mode);
2441 case EXPR_BINARY_BITWISE_AND:
2442 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2443 return new_d_And(dbgi, left, right, mode);
2444 case EXPR_BINARY_BITWISE_OR:
2445 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2446 return new_d_Or(dbgi, left, right, mode);
2447 case EXPR_BINARY_BITWISE_XOR:
2448 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2449 return new_d_Eor(dbgi, left, right, mode);
2450 case EXPR_BINARY_SHIFTLEFT:
2451 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2452 return new_d_Shl(dbgi, left, right, mode);
2453 case EXPR_BINARY_SHIFTRIGHT:
2454 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2455 if (mode_is_signed(mode)) {
2456 return new_d_Shrs(dbgi, left, right, mode);
2458 return new_d_Shr(dbgi, left, right, mode);
2460 case EXPR_BINARY_DIV:
2461 case EXPR_BINARY_DIV_ASSIGN: {
2462 ir_node *pin = new_Pin(new_NoMem());
2463 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2464 op_pin_state_floats);
2465 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2468 case EXPR_BINARY_MOD:
2469 case EXPR_BINARY_MOD_ASSIGN: {
2470 ir_node *pin = new_Pin(new_NoMem());
2471 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2472 op_pin_state_floats);
2473 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2477 panic("unexpected expression kind");
2481 static ir_node *create_lazy_op(const binary_expression_t *expression)
2483 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2484 type_t *type = skip_typeref(expression->base.type);
2485 ir_mode *mode = get_ir_mode_arithmetic(type);
2487 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2488 bool val = fold_constant_to_bool(expression->left);
2489 expression_kind_t ekind = expression->base.kind;
2490 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2491 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2493 return new_Const(get_mode_null(mode));
2497 return new_Const(get_mode_one(mode));
2501 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2502 bool valr = fold_constant_to_bool(expression->right);
2503 return create_Const_from_bool(mode, valr);
2506 return produce_condition_result(expression->right, mode, dbgi);
2509 return produce_condition_result((const expression_t*) expression, mode,
2513 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2514 ir_node *right, ir_mode *mode);
2516 static ir_node *create_assign_binop(const binary_expression_t *expression)
2518 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2519 const expression_t *left_expr = expression->left;
2520 type_t *type = skip_typeref(left_expr->base.type);
2521 ir_node *right = expression_to_firm(expression->right);
2522 ir_node *left_addr = expression_to_addr(left_expr);
2523 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2524 ir_node *result = create_op(dbgi, expression, left, right);
2526 result = create_cast(dbgi, result, expression->right->base.type, type);
2528 result = set_value_for_expression_addr(left_expr, result, left_addr);
2530 if (!is_type_compound(type)) {
2531 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2532 result = create_conv(dbgi, result, mode_arithmetic);
2537 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2539 expression_kind_t kind = expression->base.kind;
2542 case EXPR_BINARY_EQUAL:
2543 case EXPR_BINARY_NOTEQUAL:
2544 case EXPR_BINARY_LESS:
2545 case EXPR_BINARY_LESSEQUAL:
2546 case EXPR_BINARY_GREATER:
2547 case EXPR_BINARY_GREATEREQUAL:
2548 case EXPR_BINARY_ISGREATER:
2549 case EXPR_BINARY_ISGREATEREQUAL:
2550 case EXPR_BINARY_ISLESS:
2551 case EXPR_BINARY_ISLESSEQUAL:
2552 case EXPR_BINARY_ISLESSGREATER:
2553 case EXPR_BINARY_ISUNORDERED: {
2554 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2555 ir_node *left = expression_to_firm(expression->left);
2556 ir_node *right = expression_to_firm(expression->right);
2557 ir_relation relation = get_relation(kind);
2558 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2561 case EXPR_BINARY_ASSIGN: {
2562 ir_node *addr = expression_to_addr(expression->left);
2563 ir_node *right = expression_to_firm(expression->right);
2565 = set_value_for_expression_addr(expression->left, right, addr);
2567 type_t *type = skip_typeref(expression->base.type);
2568 if (!is_type_compound(type)) {
2569 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570 res = create_conv(NULL, res, mode_arithmetic);
2574 case EXPR_BINARY_ADD:
2575 case EXPR_BINARY_SUB:
2576 case EXPR_BINARY_MUL:
2577 case EXPR_BINARY_DIV:
2578 case EXPR_BINARY_MOD:
2579 case EXPR_BINARY_BITWISE_AND:
2580 case EXPR_BINARY_BITWISE_OR:
2581 case EXPR_BINARY_BITWISE_XOR:
2582 case EXPR_BINARY_SHIFTLEFT:
2583 case EXPR_BINARY_SHIFTRIGHT:
2585 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2586 ir_node *left = expression_to_firm(expression->left);
2587 ir_node *right = expression_to_firm(expression->right);
2588 return create_op(dbgi, expression, left, right);
2590 case EXPR_BINARY_LOGICAL_AND:
2591 case EXPR_BINARY_LOGICAL_OR:
2592 return create_lazy_op(expression);
2593 case EXPR_BINARY_COMMA:
2594 /* create side effects of left side */
2595 (void) expression_to_firm(expression->left);
2596 return _expression_to_firm(expression->right);
2598 case EXPR_BINARY_ADD_ASSIGN:
2599 case EXPR_BINARY_SUB_ASSIGN:
2600 case EXPR_BINARY_MUL_ASSIGN:
2601 case EXPR_BINARY_MOD_ASSIGN:
2602 case EXPR_BINARY_DIV_ASSIGN:
2603 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2604 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2605 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2606 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2607 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2608 return create_assign_binop(expression);
2610 panic("invalid binexpr type");
2614 static ir_node *array_access_addr(const array_access_expression_t *expression)
2616 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617 ir_node *base_addr = expression_to_firm(expression->array_ref);
2618 ir_node *offset = expression_to_firm(expression->index);
2619 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2620 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2621 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2626 static ir_node *array_access_to_firm(
2627 const array_access_expression_t *expression)
2629 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2630 ir_node *addr = array_access_addr(expression);
2631 type_t *type = revert_automatic_type_conversion(
2632 (const expression_t*) expression);
2633 type = skip_typeref(type);
2635 return deref_address(dbgi, type, addr);
2638 static long get_offsetof_offset(const offsetof_expression_t *expression)
2640 type_t *orig_type = expression->type;
2643 designator_t *designator = expression->designator;
2644 for ( ; designator != NULL; designator = designator->next) {
2645 type_t *type = skip_typeref(orig_type);
2646 /* be sure the type is constructed */
2647 (void) get_ir_type(type);
2649 if (designator->symbol != NULL) {
2650 assert(is_type_compound(type));
2651 symbol_t *symbol = designator->symbol;
2653 compound_t *compound = type->compound.compound;
2654 entity_t *iter = compound->members.entities;
2655 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2657 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2658 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2659 offset += get_entity_offset(iter->compound_member.entity);
2661 orig_type = iter->declaration.type;
2663 expression_t *array_index = designator->array_index;
2664 assert(designator->array_index != NULL);
2665 assert(is_type_array(type));
2667 long index = fold_constant_to_int(array_index);
2668 ir_type *arr_type = get_ir_type(type);
2669 ir_type *elem_type = get_array_element_type(arr_type);
2670 long elem_size = get_type_size_bytes(elem_type);
2672 offset += index * elem_size;
2674 orig_type = type->array.element_type;
2681 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2683 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2684 long offset = get_offsetof_offset(expression);
2685 ir_tarval *tv = new_tarval_from_long(offset, mode);
2686 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2688 return new_d_Const(dbgi, tv);
2691 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2692 ir_entity *entity, type_t *type);
2693 static ir_initializer_t *create_ir_initializer(
2694 const initializer_t *initializer, type_t *type);
2696 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2697 initializer_t *initializer,
2700 /* create the ir_initializer */
2701 ir_graph *const old_current_ir_graph = current_ir_graph;
2702 current_ir_graph = get_const_code_irg();
2704 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2706 assert(current_ir_graph == get_const_code_irg());
2707 current_ir_graph = old_current_ir_graph;
2709 ident *const id = id_unique("initializer.%u");
2710 ir_type *const irtype = get_ir_type(type);
2711 ir_type *const global_type = get_glob_type();
2712 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2713 set_entity_ld_ident(entity, id);
2714 set_entity_visibility(entity, ir_visibility_private);
2715 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2716 set_entity_initializer(entity, irinitializer);
2720 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2722 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2723 type_t *type = expression->type;
2724 initializer_t *initializer = expression->initializer;
2726 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2727 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2728 return create_symconst(dbgi, entity);
2730 /* create an entity on the stack */
2731 ident *const id = id_unique("CompLit.%u");
2732 ir_type *const irtype = get_ir_type(type);
2733 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2735 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2736 set_entity_ld_ident(entity, id);
2738 /* create initialisation code */
2739 create_local_initializer(initializer, dbgi, entity, type);
2741 /* create a sel for the compound literal address */
2742 ir_node *frame = get_irg_frame(current_ir_graph);
2743 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2748 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2750 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2751 type_t *const type = expr->type;
2752 ir_node *const addr = compound_literal_addr(expr);
2753 return deref_address(dbgi, type, addr);
2757 * Transform a sizeof expression into Firm code.
2759 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2761 type_t *const type = skip_typeref(expression->type);
2762 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2763 if (is_type_array(type) && type->array.is_vla
2764 && expression->tp_expression != NULL) {
2765 expression_to_firm(expression->tp_expression);
2768 return get_type_size_node(type);
2771 static entity_t *get_expression_entity(const expression_t *expression)
2773 if (expression->kind != EXPR_REFERENCE)
2776 return expression->reference.entity;
2779 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2781 switch(entity->kind) {
2782 case DECLARATION_KIND_CASES:
2783 return entity->declaration.alignment;
2786 return entity->compound.alignment;
2787 case ENTITY_TYPEDEF:
2788 return entity->typedefe.alignment;
2796 * Transform an alignof expression into Firm code.
2798 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2800 unsigned alignment = 0;
2802 const expression_t *tp_expression = expression->tp_expression;
2803 if (tp_expression != NULL) {
2804 entity_t *entity = get_expression_entity(tp_expression);
2805 if (entity != NULL) {
2806 alignment = get_cparser_entity_alignment(entity);
2810 if (alignment == 0) {
2811 type_t *type = expression->type;
2812 alignment = get_type_alignment(type);
2815 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2816 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2817 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2818 return new_d_Const(dbgi, tv);
2821 static void init_ir_types(void);
2823 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2825 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2827 bool constant_folding_old = constant_folding;
2828 constant_folding = true;
2829 int old_optimize = get_optimize();
2830 int old_constant_folding = get_opt_constant_folding();
2832 set_opt_constant_folding(1);
2836 ir_graph *old_current_ir_graph = current_ir_graph;
2837 current_ir_graph = get_const_code_irg();
2839 ir_node *const cnst = _expression_to_firm(expression);
2841 current_ir_graph = old_current_ir_graph;
2842 set_optimize(old_optimize);
2843 set_opt_constant_folding(old_constant_folding);
2845 if (!is_Const(cnst)) {
2846 panic("couldn't fold constant");
2849 constant_folding = constant_folding_old;
2851 ir_tarval *const tv = get_Const_tarval(cnst);
2852 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2853 return tarval_convert_to(tv, mode);
2856 /* this function is only used in parser.c, but it relies on libfirm functionality */
2857 bool constant_is_negative(const expression_t *expression)
2859 ir_tarval *tv = fold_constant_to_tarval(expression);
2860 return tarval_is_negative(tv);
2863 long fold_constant_to_int(const expression_t *expression)
2865 ir_tarval *tv = fold_constant_to_tarval(expression);
2866 if (!tarval_is_long(tv)) {
2867 panic("result of constant folding is not integer");
2870 return get_tarval_long(tv);
2873 bool fold_constant_to_bool(const expression_t *expression)
2875 ir_tarval *tv = fold_constant_to_tarval(expression);
2876 return !tarval_is_null(tv);
2879 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2881 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2883 /* first try to fold a constant condition */
2884 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2885 bool val = fold_constant_to_bool(expression->condition);
2887 expression_t *true_expression = expression->true_expression;
2888 if (true_expression == NULL)
2889 true_expression = expression->condition;
2890 return expression_to_firm(true_expression);
2892 return expression_to_firm(expression->false_expression);
2896 ir_node *const true_block = new_immBlock();
2897 ir_node *const false_block = new_immBlock();
2898 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2899 mature_immBlock(true_block);
2900 mature_immBlock(false_block);
2902 set_cur_block(true_block);
2904 if (expression->true_expression != NULL) {
2905 true_val = expression_to_firm(expression->true_expression);
2906 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2907 true_val = cond_expr;
2909 /* Condition ended with a short circuit (&&, ||, !) operation or a
2910 * comparison. Generate a "1" as value for the true branch. */
2911 true_val = new_Const(get_mode_one(mode_Is));
2913 ir_node *const true_jmp = new_d_Jmp(dbgi);
2915 set_cur_block(false_block);
2916 ir_node *const false_val = expression_to_firm(expression->false_expression);
2917 ir_node *const false_jmp = new_d_Jmp(dbgi);
2919 /* create the common block */
2920 ir_node *const in_cf[2] = { true_jmp, false_jmp };
2921 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2922 set_cur_block(block);
2924 /* TODO improve static semantics, so either both or no values are NULL */
2925 if (true_val == NULL || false_val == NULL)
2928 ir_node *const in[2] = { true_val, false_val };
2929 type_t *const type = skip_typeref(expression->base.type);
2930 ir_mode *const mode = get_ir_mode_arithmetic(type);
2931 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2937 * Returns an IR-node representing the address of a field.
2939 static ir_node *select_addr(const select_expression_t *expression)
2941 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2943 construct_select_compound(expression);
2945 ir_node *compound_addr = expression_to_firm(expression->compound);
2947 entity_t *entry = expression->compound_entry;
2948 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2949 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2951 if (constant_folding) {
2952 ir_mode *mode = get_irn_mode(compound_addr);
2953 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2954 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2955 return new_d_Add(dbgi, compound_addr, ofs, mode);
2957 ir_entity *irentity = entry->compound_member.entity;
2958 assert(irentity != NULL);
2959 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2963 static ir_node *select_to_firm(const select_expression_t *expression)
2965 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2966 ir_node *addr = select_addr(expression);
2967 type_t *type = revert_automatic_type_conversion(
2968 (const expression_t*) expression);
2969 type = skip_typeref(type);
2971 entity_t *entry = expression->compound_entry;
2972 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2974 if (entry->compound_member.bitfield) {
2975 return bitfield_extract_to_firm(expression, addr);
2978 return deref_address(dbgi, type, addr);
2981 /* Values returned by __builtin_classify_type. */
2982 typedef enum gcc_type_class
2988 enumeral_type_class,
2991 reference_type_class,
2995 function_type_class,
3006 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3008 type_t *type = expr->type_expression->base.type;
3010 /* FIXME gcc returns different values depending on whether compiling C or C++
3011 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3014 type = skip_typeref(type);
3015 switch (type->kind) {
3017 const atomic_type_t *const atomic_type = &type->atomic;
3018 switch (atomic_type->akind) {
3019 /* gcc cannot do that */
3020 case ATOMIC_TYPE_VOID:
3021 tc = void_type_class;
3024 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3025 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3026 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3027 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3028 case ATOMIC_TYPE_SHORT:
3029 case ATOMIC_TYPE_USHORT:
3030 case ATOMIC_TYPE_INT:
3031 case ATOMIC_TYPE_UINT:
3032 case ATOMIC_TYPE_LONG:
3033 case ATOMIC_TYPE_ULONG:
3034 case ATOMIC_TYPE_LONGLONG:
3035 case ATOMIC_TYPE_ULONGLONG:
3036 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3037 tc = integer_type_class;
3040 case ATOMIC_TYPE_FLOAT:
3041 case ATOMIC_TYPE_DOUBLE:
3042 case ATOMIC_TYPE_LONG_DOUBLE:
3043 tc = real_type_class;
3046 panic("Unexpected atomic type in classify_type_to_firm().");
3049 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3050 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3051 case TYPE_ARRAY: /* gcc handles this as pointer */
3052 case TYPE_FUNCTION: /* gcc handles this as pointer */
3053 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3054 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3055 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3057 /* gcc handles this as integer */
3058 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3060 /* gcc classifies the referenced type */
3061 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3063 /* typedef/typeof should be skipped already */
3069 panic("unexpected TYPE classify_type_to_firm().");
3073 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3074 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3075 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3076 return new_d_Const(dbgi, tv);
3079 static ir_node *function_name_to_firm(
3080 const funcname_expression_t *const expr)
3082 switch(expr->kind) {
3083 case FUNCNAME_FUNCTION:
3084 case FUNCNAME_PRETTY_FUNCTION:
3085 case FUNCNAME_FUNCDNAME:
3086 if (current_function_name == NULL) {
3087 source_position_t const *const src_pos = &expr->base.source_position;
3088 char const *const name = current_function_entity->base.symbol->string;
3089 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3090 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3092 return current_function_name;
3093 case FUNCNAME_FUNCSIG:
3094 if (current_funcsig == NULL) {
3095 source_position_t const *const src_pos = &expr->base.source_position;
3096 ir_entity *const ent = get_irg_entity(current_ir_graph);
3097 char const *const name = get_entity_ld_name(ent);
3098 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3099 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3101 return current_funcsig;
3103 panic("Unsupported function name");
3106 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3108 statement_t *statement = expr->statement;
3110 assert(statement->kind == STATEMENT_COMPOUND);
3111 return compound_statement_to_firm(&statement->compound);
3114 static ir_node *va_start_expression_to_firm(
3115 const va_start_expression_t *const expr)
3117 ir_entity *param_ent = current_vararg_entity;
3118 if (param_ent == NULL) {
3119 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3120 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3121 ir_type *const param_type = get_unknown_type();
3122 param_ent = new_parameter_entity(frame_type, n, param_type);
3123 current_vararg_entity = param_ent;
3126 ir_node *const frame = get_irg_frame(current_ir_graph);
3127 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3128 ir_node *const no_mem = new_NoMem();
3129 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3131 set_value_for_expression(expr->ap, arg_sel);
3136 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3138 type_t *const type = expr->base.type;
3139 expression_t *const ap_expr = expr->ap;
3140 ir_node *const ap_addr = expression_to_addr(ap_expr);
3141 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3142 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3143 ir_node *const res = deref_address(dbgi, type, ap);
3145 ir_node *const cnst = get_type_size_node(expr->base.type);
3146 ir_mode *const mode = get_irn_mode(cnst);
3147 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3148 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3149 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3150 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3151 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3153 set_value_for_expression_addr(ap_expr, add, ap_addr);
3159 * Generate Firm for a va_copy expression.
3161 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3163 ir_node *const src = expression_to_firm(expr->src);
3164 set_value_for_expression(expr->dst, src);
3168 static ir_node *dereference_addr(const unary_expression_t *const expression)
3170 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3171 return expression_to_firm(expression->value);
3175 * Returns a IR-node representing an lvalue of the given expression.
3177 static ir_node *expression_to_addr(const expression_t *expression)
3179 switch(expression->kind) {
3180 case EXPR_ARRAY_ACCESS:
3181 return array_access_addr(&expression->array_access);
3183 return call_expression_to_firm(&expression->call);
3184 case EXPR_COMPOUND_LITERAL:
3185 return compound_literal_addr(&expression->compound_literal);
3186 case EXPR_REFERENCE:
3187 return reference_addr(&expression->reference);
3189 return select_addr(&expression->select);
3190 case EXPR_UNARY_DEREFERENCE:
3191 return dereference_addr(&expression->unary);
3195 panic("trying to get address of non-lvalue");
3198 static ir_node *builtin_constant_to_firm(
3199 const builtin_constant_expression_t *expression)
3201 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3202 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3203 return create_Const_from_bool(mode, v);
3206 static ir_node *builtin_types_compatible_to_firm(
3207 const builtin_types_compatible_expression_t *expression)
3209 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3210 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3211 bool const value = types_compatible(left, right);
3212 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3213 return create_Const_from_bool(mode, value);
3216 static ir_node *get_label_block(label_t *label)
3218 if (label->block != NULL)
3219 return label->block;
3221 /* beware: might be called from create initializer with current_ir_graph
3222 * set to const_code_irg. */
3223 ir_graph *rem = current_ir_graph;
3224 current_ir_graph = current_function;
3226 ir_node *block = new_immBlock();
3228 label->block = block;
3230 ARR_APP1(label_t *, all_labels, label);
3232 current_ir_graph = rem;
3237 * Pointer to a label. This is used for the
3238 * GNU address-of-label extension.
3240 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3242 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3243 ir_node *block = get_label_block(label->label);
3244 ir_entity *entity = create_Block_entity(block);
3246 symconst_symbol value;
3247 value.entity_p = entity;
3248 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3252 * creates firm nodes for an expression. The difference between this function
3253 * and expression_to_firm is, that this version might produce mode_b nodes
3254 * instead of mode_Is.
3256 static ir_node *_expression_to_firm(expression_t const *const expr)
3259 if (!constant_folding) {
3260 assert(!expr->base.transformed);
3261 ((expression_t*)expr)->base.transformed = true;
3265 switch (expr->kind) {
3266 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3267 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3268 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3269 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3270 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3271 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3272 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3273 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3274 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3275 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3276 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3277 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3278 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3279 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3280 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3281 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3282 case EXPR_SELECT: return select_to_firm( &expr->select);
3283 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3284 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3285 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3286 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3287 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3288 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3290 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3292 case EXPR_ERROR: break;
3294 panic("invalid expression found");
3298 * Check if a given expression is a GNU __builtin_expect() call.
3300 static bool is_builtin_expect(const expression_t *expression)
3302 if (expression->kind != EXPR_CALL)
3305 expression_t *function = expression->call.function;
3306 if (function->kind != EXPR_REFERENCE)
3308 reference_expression_t *ref = &function->reference;
3309 if (ref->entity->kind != ENTITY_FUNCTION ||
3310 ref->entity->function.btk != BUILTIN_EXPECT)
3316 static bool produces_mode_b(const expression_t *expression)
3318 switch (expression->kind) {
3319 case EXPR_BINARY_EQUAL:
3320 case EXPR_BINARY_NOTEQUAL:
3321 case EXPR_BINARY_LESS:
3322 case EXPR_BINARY_LESSEQUAL:
3323 case EXPR_BINARY_GREATER:
3324 case EXPR_BINARY_GREATEREQUAL:
3325 case EXPR_BINARY_ISGREATER:
3326 case EXPR_BINARY_ISGREATEREQUAL:
3327 case EXPR_BINARY_ISLESS:
3328 case EXPR_BINARY_ISLESSEQUAL:
3329 case EXPR_BINARY_ISLESSGREATER:
3330 case EXPR_BINARY_ISUNORDERED:
3331 case EXPR_UNARY_NOT:
3335 if (is_builtin_expect(expression)) {
3336 expression_t *argument = expression->call.arguments->expression;
3337 return produces_mode_b(argument);
3340 case EXPR_BINARY_COMMA:
3341 return produces_mode_b(expression->binary.right);
3348 static ir_node *expression_to_firm(const expression_t *expression)
3350 if (!produces_mode_b(expression)) {
3351 ir_node *res = _expression_to_firm(expression);
3352 assert(res == NULL || get_irn_mode(res) != mode_b);
3356 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3357 return new_Const(fold_constant_to_tarval(expression));
3360 /* we have to produce a 0/1 from the mode_b expression */
3361 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3362 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3363 return produce_condition_result(expression, mode, dbgi);
3367 * create a short-circuit expression evaluation that tries to construct
3368 * efficient control flow structures for &&, || and ! expressions
3370 static ir_node *create_condition_evaluation(const expression_t *expression,
3371 ir_node *true_block,
3372 ir_node *false_block)
3374 switch(expression->kind) {
3375 case EXPR_UNARY_NOT: {
3376 const unary_expression_t *unary_expression = &expression->unary;
3377 create_condition_evaluation(unary_expression->value, false_block,
3381 case EXPR_BINARY_LOGICAL_AND: {
3382 const binary_expression_t *binary_expression = &expression->binary;
3384 ir_node *extra_block = new_immBlock();
3385 create_condition_evaluation(binary_expression->left, extra_block,
3387 mature_immBlock(extra_block);
3388 set_cur_block(extra_block);
3389 create_condition_evaluation(binary_expression->right, true_block,
3393 case EXPR_BINARY_LOGICAL_OR: {
3394 const binary_expression_t *binary_expression = &expression->binary;
3396 ir_node *extra_block = new_immBlock();
3397 create_condition_evaluation(binary_expression->left, true_block,
3399 mature_immBlock(extra_block);
3400 set_cur_block(extra_block);
3401 create_condition_evaluation(binary_expression->right, true_block,
3409 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3410 ir_node *cond_expr = _expression_to_firm(expression);
3411 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3412 ir_node *cond = new_d_Cond(dbgi, condition);
3413 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3414 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3416 /* set branch prediction info based on __builtin_expect */
3417 if (is_builtin_expect(expression) && is_Cond(cond)) {
3418 call_argument_t *argument = expression->call.arguments->next;
3419 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3420 bool const cnst = fold_constant_to_bool(argument->expression);
3421 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3422 set_Cond_jmp_pred(cond, pred);
3426 add_immBlock_pred(true_block, true_proj);
3427 add_immBlock_pred(false_block, false_proj);
3429 set_unreachable_now();
3433 static void create_variable_entity(entity_t *variable,
3434 declaration_kind_t declaration_kind,
3435 ir_type *parent_type)
3437 assert(variable->kind == ENTITY_VARIABLE);
3438 type_t *type = skip_typeref(variable->declaration.type);
3440 ident *const id = new_id_from_str(variable->base.symbol->string);
3441 ir_type *const irtype = get_ir_type(type);
3442 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3443 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3444 unsigned alignment = variable->declaration.alignment;
3446 set_entity_alignment(irentity, alignment);
3448 handle_decl_modifiers(irentity, variable);
3450 variable->declaration.kind = (unsigned char) declaration_kind;
3451 variable->variable.v.entity = irentity;
3452 set_entity_ld_ident(irentity, create_ld_ident(variable));
3454 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3455 set_entity_volatility(irentity, volatility_is_volatile);
3460 typedef struct type_path_entry_t type_path_entry_t;
3461 struct type_path_entry_t {
3463 ir_initializer_t *initializer;
3465 entity_t *compound_entry;
3468 typedef struct type_path_t type_path_t;
3469 struct type_path_t {
3470 type_path_entry_t *path;
3475 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3477 size_t len = ARR_LEN(path->path);
3479 for (size_t i = 0; i < len; ++i) {
3480 const type_path_entry_t *entry = & path->path[i];
3482 type_t *type = skip_typeref(entry->type);
3483 if (is_type_compound(type)) {
3484 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3485 } else if (is_type_array(type)) {
3486 fprintf(stderr, "[%u]", (unsigned) entry->index);
3488 fprintf(stderr, "-INVALID-");
3491 fprintf(stderr, " (");
3492 print_type(path->top_type);
3493 fprintf(stderr, ")");
3496 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3498 size_t len = ARR_LEN(path->path);
3500 return & path->path[len-1];
3503 static type_path_entry_t *append_to_type_path(type_path_t *path)
3505 size_t len = ARR_LEN(path->path);
3506 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3508 type_path_entry_t *result = & path->path[len];
3509 memset(result, 0, sizeof(result[0]));
3513 static size_t get_compound_member_count(const compound_type_t *type)
3515 compound_t *compound = type->compound;
3516 size_t n_members = 0;
3517 entity_t *member = compound->members.entities;
3518 for ( ; member != NULL; member = member->base.next) {
3525 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3527 type_t *orig_top_type = path->top_type;
3528 type_t *top_type = skip_typeref(orig_top_type);
3530 assert(is_type_compound(top_type) || is_type_array(top_type));
3532 if (ARR_LEN(path->path) == 0) {
3535 type_path_entry_t *top = get_type_path_top(path);
3536 ir_initializer_t *initializer = top->initializer;
3537 return get_initializer_compound_value(initializer, top->index);
3541 static void descend_into_subtype(type_path_t *path)
3543 type_t *orig_top_type = path->top_type;
3544 type_t *top_type = skip_typeref(orig_top_type);
3546 assert(is_type_compound(top_type) || is_type_array(top_type));
3548 ir_initializer_t *initializer = get_initializer_entry(path);
3550 type_path_entry_t *top = append_to_type_path(path);
3551 top->type = top_type;
3555 if (is_type_compound(top_type)) {
3556 compound_t *const compound = top_type->compound.compound;
3557 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3559 top->compound_entry = entry;
3561 len = get_compound_member_count(&top_type->compound);
3562 if (entry != NULL) {
3563 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3564 path->top_type = entry->declaration.type;
3567 assert(is_type_array(top_type));
3568 assert(top_type->array.size > 0);
3571 path->top_type = top_type->array.element_type;
3572 len = top_type->array.size;
3574 if (initializer == NULL
3575 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3576 initializer = create_initializer_compound(len);
3577 /* we have to set the entry at the 2nd latest path entry... */
3578 size_t path_len = ARR_LEN(path->path);
3579 assert(path_len >= 1);
3581 type_path_entry_t *entry = & path->path[path_len-2];
3582 ir_initializer_t *tinitializer = entry->initializer;
3583 set_initializer_compound_value(tinitializer, entry->index,
3587 top->initializer = initializer;
3590 static void ascend_from_subtype(type_path_t *path)
3592 type_path_entry_t *top = get_type_path_top(path);
3594 path->top_type = top->type;
3596 size_t len = ARR_LEN(path->path);
3597 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3600 static void walk_designator(type_path_t *path, const designator_t *designator)
3602 /* designators start at current object type */
3603 ARR_RESIZE(type_path_entry_t, path->path, 1);
3605 for ( ; designator != NULL; designator = designator->next) {
3606 type_path_entry_t *top = get_type_path_top(path);
3607 type_t *orig_type = top->type;
3608 type_t *type = skip_typeref(orig_type);
3610 if (designator->symbol != NULL) {
3611 assert(is_type_compound(type));
3613 symbol_t *symbol = designator->symbol;
3615 compound_t *compound = type->compound.compound;
3616 entity_t *iter = compound->members.entities;
3617 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3618 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3620 /* revert previous initialisations of other union elements */
3621 if (type->kind == TYPE_COMPOUND_UNION) {
3622 ir_initializer_t *initializer = top->initializer;
3623 if (initializer != NULL
3624 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3625 /* are we writing to a new element? */
3626 ir_initializer_t *oldi
3627 = get_initializer_compound_value(initializer, index);
3628 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3629 /* clear initializer */
3631 = get_initializer_compound_n_entries(initializer);
3632 ir_initializer_t *nulli = get_initializer_null();
3633 for (size_t i = 0; i < len; ++i) {
3634 set_initializer_compound_value(initializer, i,
3641 top->type = orig_type;
3642 top->compound_entry = iter;
3644 orig_type = iter->declaration.type;
3646 expression_t *array_index = designator->array_index;
3647 assert(is_type_array(type));
3649 long index = fold_constant_to_int(array_index);
3650 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3652 top->type = orig_type;
3653 top->index = (size_t) index;
3654 orig_type = type->array.element_type;
3656 path->top_type = orig_type;
3658 if (designator->next != NULL) {
3659 descend_into_subtype(path);
3663 path->invalid = false;
3666 static void advance_current_object(type_path_t *path)
3668 if (path->invalid) {
3669 /* TODO: handle this... */
3670 panic("invalid initializer in ast2firm (excessive elements)");
3673 type_path_entry_t *top = get_type_path_top(path);
3675 type_t *type = skip_typeref(top->type);
3676 if (is_type_union(type)) {
3677 /* only the first element is initialized in unions */
3678 top->compound_entry = NULL;
3679 } else if (is_type_struct(type)) {
3680 entity_t *entry = top->compound_entry;
3683 entry = skip_unnamed_bitfields(entry->base.next);
3684 top->compound_entry = entry;
3685 if (entry != NULL) {
3686 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3687 path->top_type = entry->declaration.type;
3691 assert(is_type_array(type));
3694 if (!type->array.size_constant || top->index < type->array.size) {
3699 /* we're past the last member of the current sub-aggregate, try if we
3700 * can ascend in the type hierarchy and continue with another subobject */
3701 size_t len = ARR_LEN(path->path);
3704 ascend_from_subtype(path);
3705 advance_current_object(path);
3707 path->invalid = true;
3712 static ir_initializer_t *create_ir_initializer_value(
3713 const initializer_value_t *initializer)
3715 if (is_type_compound(initializer->value->base.type)) {
3716 panic("initializer creation for compounds not implemented yet");
3718 type_t *type = initializer->value->base.type;
3719 expression_t *expr = initializer->value;
3720 ir_node *value = expression_to_firm(expr);
3721 ir_mode *mode = get_ir_mode_storage(type);
3722 value = create_conv(NULL, value, mode);
3723 return create_initializer_const(value);
3726 /** test wether type can be initialized by a string constant */
3727 static bool is_string_type(type_t *type)
3729 if (!is_type_array(type))
3732 type_t *const inner = skip_typeref(type->array.element_type);
3733 return is_type_integer(inner);
3736 static ir_initializer_t *create_ir_initializer_list(
3737 const initializer_list_t *initializer, type_t *type)
3740 memset(&path, 0, sizeof(path));
3741 path.top_type = type;
3742 path.path = NEW_ARR_F(type_path_entry_t, 0);
3744 descend_into_subtype(&path);
3746 for (size_t i = 0; i < initializer->len; ++i) {
3747 const initializer_t *sub_initializer = initializer->initializers[i];
3749 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3750 walk_designator(&path, sub_initializer->designator.designator);
3754 if (sub_initializer->kind == INITIALIZER_VALUE) {
3755 /* we might have to descend into types until we're at a scalar
3758 type_t *orig_top_type = path.top_type;
3759 type_t *top_type = skip_typeref(orig_top_type);
3761 if (is_type_scalar(top_type))
3763 descend_into_subtype(&path);
3765 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3766 /* we might have to descend into types until we're at a scalar
3769 type_t *orig_top_type = path.top_type;
3770 type_t *top_type = skip_typeref(orig_top_type);
3772 if (is_string_type(top_type))
3774 descend_into_subtype(&path);
3778 ir_initializer_t *sub_irinitializer
3779 = create_ir_initializer(sub_initializer, path.top_type);
3781 size_t path_len = ARR_LEN(path.path);
3782 assert(path_len >= 1);
3783 type_path_entry_t *entry = & path.path[path_len-1];
3784 ir_initializer_t *tinitializer = entry->initializer;
3785 set_initializer_compound_value(tinitializer, entry->index,
3788 advance_current_object(&path);
3791 assert(ARR_LEN(path.path) >= 1);
3792 ir_initializer_t *result = path.path[0].initializer;
3793 DEL_ARR_F(path.path);
3798 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3800 type = skip_typeref(type);
3802 assert(type->kind == TYPE_ARRAY);
3803 assert(type->array.size_constant);
3804 string_literal_expression_t const *const str = get_init_string(init);
3805 size_t const str_len = str->value.size;
3806 size_t const arr_len = type->array.size;
3807 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3808 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3809 char const * p = str->value.begin;
3810 switch (str->value.encoding) {
3811 case STRING_ENCODING_CHAR:
3812 for (size_t i = 0; i != arr_len; ++i) {
3813 char const c = i < str_len ? *p++ : 0;
3814 ir_tarval *const tv = new_tarval_from_long(c, mode);
3815 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3816 set_initializer_compound_value(irinit, i, tvinit);
3820 case STRING_ENCODING_WIDE:
3821 for (size_t i = 0; i != arr_len; ++i) {
3822 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3823 ir_tarval *const tv = new_tarval_from_long(c, mode);
3824 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3825 set_initializer_compound_value(irinit, i, tvinit);
3833 static ir_initializer_t *create_ir_initializer(
3834 const initializer_t *initializer, type_t *type)
3836 switch(initializer->kind) {
3837 case INITIALIZER_STRING:
3838 return create_ir_initializer_string(initializer, type);
3840 case INITIALIZER_LIST:
3841 return create_ir_initializer_list(&initializer->list, type);
3843 case INITIALIZER_VALUE:
3844 return create_ir_initializer_value(&initializer->value);
3846 case INITIALIZER_DESIGNATOR:
3847 panic("unexpected designator initializer found");
3849 panic("unknown initializer");
3852 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3853 * are elements [...] the remainder of the aggregate shall be initialized
3854 * implicitly the same as objects that have static storage duration. */
3855 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3858 /* for unions we must NOT do anything for null initializers */
3859 ir_type *owner = get_entity_owner(entity);
3860 if (is_Union_type(owner)) {
3864 ir_type *ent_type = get_entity_type(entity);
3865 /* create sub-initializers for a compound type */
3866 if (is_compound_type(ent_type)) {
3867 unsigned n_members = get_compound_n_members(ent_type);
3868 for (unsigned n = 0; n < n_members; ++n) {
3869 ir_entity *member = get_compound_member(ent_type, n);
3870 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3872 create_dynamic_null_initializer(member, dbgi, addr);
3876 if (is_Array_type(ent_type)) {
3877 assert(has_array_upper_bound(ent_type, 0));
3878 long n = get_array_upper_bound_int(ent_type, 0);
3879 for (long i = 0; i < n; ++i) {
3880 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3881 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3882 ir_node *cnst = new_d_Const(dbgi, index_tv);
3883 ir_node *in[1] = { cnst };
3884 ir_entity *arrent = get_array_element_entity(ent_type);
3885 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3887 create_dynamic_null_initializer(arrent, dbgi, addr);
3892 ir_mode *value_mode = get_type_mode(ent_type);
3893 ir_node *node = new_Const(get_mode_null(value_mode));
3895 /* is it a bitfield type? */
3896 if (is_Primitive_type(ent_type) &&
3897 get_primitive_base_type(ent_type) != NULL) {
3898 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3902 ir_node *mem = get_store();
3903 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3904 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3908 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3909 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3911 switch(get_initializer_kind(initializer)) {
3912 case IR_INITIALIZER_NULL:
3913 create_dynamic_null_initializer(entity, dbgi, base_addr);
3915 case IR_INITIALIZER_CONST: {
3916 ir_node *node = get_initializer_const_value(initializer);
3917 ir_type *ent_type = get_entity_type(entity);
3919 /* is it a bitfield type? */
3920 if (is_Primitive_type(ent_type) &&
3921 get_primitive_base_type(ent_type) != NULL) {
3922 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3926 assert(get_type_mode(type) == get_irn_mode(node));
3927 ir_node *mem = get_store();
3928 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3929 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3933 case IR_INITIALIZER_TARVAL: {
3934 ir_tarval *tv = get_initializer_tarval_value(initializer);
3935 ir_node *cnst = new_d_Const(dbgi, tv);
3936 ir_type *ent_type = get_entity_type(entity);
3938 /* is it a bitfield type? */
3939 if (is_Primitive_type(ent_type) &&
3940 get_primitive_base_type(ent_type) != NULL) {
3941 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3945 assert(get_type_mode(type) == get_tarval_mode(tv));
3946 ir_node *mem = get_store();
3947 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3948 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3952 case IR_INITIALIZER_COMPOUND: {
3953 assert(is_compound_type(type) || is_Array_type(type));
3955 if (is_Array_type(type)) {
3956 assert(has_array_upper_bound(type, 0));
3957 n_members = get_array_upper_bound_int(type, 0);
3959 n_members = get_compound_n_members(type);
3962 if (get_initializer_compound_n_entries(initializer)
3963 != (unsigned) n_members)
3964 panic("initializer doesn't match compound type");
3966 for (int i = 0; i < n_members; ++i) {
3969 ir_entity *sub_entity;
3970 if (is_Array_type(type)) {
3971 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3972 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3973 ir_node *cnst = new_d_Const(dbgi, index_tv);
3974 ir_node *in[1] = { cnst };
3975 irtype = get_array_element_type(type);
3976 sub_entity = get_array_element_entity(type);
3977 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3980 sub_entity = get_compound_member(type, i);
3981 irtype = get_entity_type(sub_entity);
3982 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3986 ir_initializer_t *sub_init
3987 = get_initializer_compound_value(initializer, i);
3989 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3996 panic("invalid IR_INITIALIZER found");
3999 static void create_dynamic_initializer(ir_initializer_t *initializer,
4000 dbg_info *dbgi, ir_entity *entity)
4002 ir_node *frame = get_irg_frame(current_ir_graph);
4003 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4004 ir_type *type = get_entity_type(entity);
4006 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4009 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4010 ir_entity *entity, type_t *type)
4012 ir_node *memory = get_store();
4013 ir_node *nomem = new_NoMem();
4014 ir_node *frame = get_irg_frame(current_ir_graph);
4015 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4017 if (initializer->kind == INITIALIZER_VALUE) {
4018 initializer_value_t *initializer_value = &initializer->value;
4020 ir_node *value = expression_to_firm(initializer_value->value);
4021 type = skip_typeref(type);
4022 assign_value(dbgi, addr, type, value);
4026 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4027 ir_initializer_t *irinitializer
4028 = create_ir_initializer(initializer, type);
4030 create_dynamic_initializer(irinitializer, dbgi, entity);
4034 /* create a "template" entity which is copied to the entity on the stack */
4035 ir_entity *const init_entity
4036 = create_initializer_entity(dbgi, initializer, type);
4037 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4038 ir_type *const irtype = get_ir_type(type);
4039 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4041 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4042 set_store(copyb_mem);
4045 static void create_initializer_local_variable_entity(entity_t *entity)
4047 assert(entity->kind == ENTITY_VARIABLE);
4048 initializer_t *initializer = entity->variable.initializer;
4049 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4050 ir_entity *irentity = entity->variable.v.entity;
4051 type_t *type = entity->declaration.type;
4053 create_local_initializer(initializer, dbgi, irentity, type);
4056 static void create_variable_initializer(entity_t *entity)
4058 assert(entity->kind == ENTITY_VARIABLE);
4059 initializer_t *initializer = entity->variable.initializer;
4060 if (initializer == NULL)
4063 declaration_kind_t declaration_kind
4064 = (declaration_kind_t) entity->declaration.kind;
4065 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4066 create_initializer_local_variable_entity(entity);
4070 type_t *type = entity->declaration.type;
4071 type_qualifiers_t tq = get_type_qualifier(type, true);
4073 if (initializer->kind == INITIALIZER_VALUE) {
4074 expression_t * value = initializer->value.value;
4075 type_t *const init_type = skip_typeref(value->base.type);
4077 if (!is_type_scalar(init_type)) {
4079 while (value->kind == EXPR_UNARY_CAST)
4080 value = value->unary.value;
4082 if (value->kind != EXPR_COMPOUND_LITERAL)
4083 panic("expected non-scalar initializer to be a compound literal");
4084 initializer = value->compound_literal.initializer;
4085 goto have_initializer;
4088 ir_node * node = expression_to_firm(value);
4089 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4090 ir_mode *const mode = get_ir_mode_storage(init_type);
4091 node = create_conv(dbgi, node, mode);
4093 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4094 set_value(entity->variable.v.value_number, node);
4096 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4098 ir_entity *irentity = entity->variable.v.entity;
4100 if (tq & TYPE_QUALIFIER_CONST
4101 && get_entity_owner(irentity) != get_tls_type()) {
4102 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4104 set_atomic_ent_value(irentity, node);
4108 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4109 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4111 ir_entity *irentity = entity->variable.v.entity;
4112 ir_initializer_t *irinitializer
4113 = create_ir_initializer(initializer, type);
4115 if (tq & TYPE_QUALIFIER_CONST) {
4116 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4118 set_entity_initializer(irentity, irinitializer);
4122 static void create_variable_length_array(entity_t *entity)
4124 assert(entity->kind == ENTITY_VARIABLE);
4125 assert(entity->variable.initializer == NULL);
4127 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4128 entity->variable.v.vla_base = NULL;
4130 /* TODO: record VLA somewhere so we create the free node when we leave
4134 static void allocate_variable_length_array(entity_t *entity)
4136 assert(entity->kind == ENTITY_VARIABLE);
4137 assert(entity->variable.initializer == NULL);
4138 assert(currently_reachable());
4140 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4141 type_t *type = entity->declaration.type;
4142 ir_type *el_type = get_ir_type(type->array.element_type);
4144 /* make sure size_node is calculated */
4145 get_type_size_node(type);
4146 ir_node *elems = type->array.size_node;
4147 ir_node *mem = get_store();
4148 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4150 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4151 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4154 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4155 entity->variable.v.vla_base = addr;
4158 static bool var_needs_entity(variable_t const *const var)
4160 if (var->address_taken)
4162 type_t *const type = skip_typeref(var->base.type);
4163 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4167 * Creates a Firm local variable from a declaration.
4169 static void create_local_variable(entity_t *entity)
4171 assert(entity->kind == ENTITY_VARIABLE);
4172 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4174 if (!var_needs_entity(&entity->variable)) {
4175 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4176 entity->variable.v.value_number = next_value_number_function;
4177 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4178 ++next_value_number_function;
4182 /* is it a variable length array? */
4183 type_t *const type = skip_typeref(entity->declaration.type);
4184 if (is_type_array(type) && !type->array.size_constant) {
4185 create_variable_length_array(entity);
4189 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4190 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4193 static void create_local_static_variable(entity_t *entity)
4195 assert(entity->kind == ENTITY_VARIABLE);
4196 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4198 type_t *type = skip_typeref(entity->declaration.type);
4199 ir_type *const var_type = entity->variable.thread_local ?
4200 get_tls_type() : get_glob_type();
4201 ir_type *const irtype = get_ir_type(type);
4202 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4204 size_t l = strlen(entity->base.symbol->string);
4205 char buf[l + sizeof(".%u")];
4206 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4207 ident *const id = id_unique(buf);
4208 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4210 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4211 set_entity_volatility(irentity, volatility_is_volatile);
4214 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4215 entity->variable.v.entity = irentity;
4217 set_entity_ld_ident(irentity, id);
4218 set_entity_visibility(irentity, ir_visibility_local);
4220 if (entity->variable.initializer == NULL) {
4221 ir_initializer_t *null_init = get_initializer_null();
4222 set_entity_initializer(irentity, null_init);
4225 ir_graph *const old_current_ir_graph = current_ir_graph;
4226 current_ir_graph = get_const_code_irg();
4228 create_variable_initializer(entity);
4230 assert(current_ir_graph == get_const_code_irg());
4231 current_ir_graph = old_current_ir_graph;
4236 static ir_node *return_statement_to_firm(return_statement_t *statement)
4238 if (!currently_reachable())
4241 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4242 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4243 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4246 if (!is_type_void(type)) {
4247 ir_mode *const mode = get_ir_mode_storage(type);
4249 res = create_conv(dbgi, res, mode);
4251 res = new_Unknown(mode);
4258 ir_node *const in[1] = { res };
4259 ir_node *const store = get_store();
4260 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4262 ir_node *end_block = get_irg_end_block(current_ir_graph);
4263 add_immBlock_pred(end_block, ret);
4265 set_unreachable_now();
4269 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4271 if (!currently_reachable())
4274 return expression_to_firm(statement->expression);
4277 static void create_local_declarations(entity_t*);
4279 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4281 create_local_declarations(compound->scope.entities);
4283 ir_node *result = NULL;
4284 statement_t *statement = compound->statements;
4285 for ( ; statement != NULL; statement = statement->base.next) {
4286 result = statement_to_firm(statement);
4292 static void create_global_variable(entity_t *entity)
4294 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4295 ir_visibility visibility = ir_visibility_external;
4296 storage_class_tag_t storage
4297 = (storage_class_tag_t)entity->declaration.storage_class;
4298 decl_modifiers_t modifiers = entity->declaration.modifiers;
4299 assert(entity->kind == ENTITY_VARIABLE);
4302 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4303 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4304 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4305 case STORAGE_CLASS_TYPEDEF:
4306 case STORAGE_CLASS_AUTO:
4307 case STORAGE_CLASS_REGISTER:
4308 panic("invalid storage class for global var");
4311 /* "common" symbols */
4312 if (storage == STORAGE_CLASS_NONE
4313 && entity->variable.initializer == NULL
4314 && !entity->variable.thread_local
4315 && (modifiers & DM_WEAK) == 0) {
4316 linkage |= IR_LINKAGE_MERGE;
4319 ir_type *var_type = get_glob_type();
4320 if (entity->variable.thread_local) {
4321 var_type = get_tls_type();
4323 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4324 ir_entity *irentity = entity->variable.v.entity;
4325 add_entity_linkage(irentity, linkage);
4326 set_entity_visibility(irentity, visibility);
4327 if (entity->variable.initializer == NULL
4328 && storage != STORAGE_CLASS_EXTERN) {
4329 ir_initializer_t *null_init = get_initializer_null();
4330 set_entity_initializer(irentity, null_init);
4334 static void create_local_declaration(entity_t *entity)
4336 assert(is_declaration(entity));
4338 /* construct type */
4339 (void) get_ir_type(entity->declaration.type);
4340 if (entity->base.symbol == NULL) {
4344 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4345 case STORAGE_CLASS_STATIC:
4346 if (entity->kind == ENTITY_FUNCTION) {
4347 (void)get_function_entity(entity, NULL);
4349 create_local_static_variable(entity);
4352 case STORAGE_CLASS_EXTERN:
4353 if (entity->kind == ENTITY_FUNCTION) {
4354 assert(entity->function.body == NULL);
4355 (void)get_function_entity(entity, NULL);
4357 create_global_variable(entity);
4358 create_variable_initializer(entity);
4361 case STORAGE_CLASS_NONE:
4362 case STORAGE_CLASS_AUTO:
4363 case STORAGE_CLASS_REGISTER:
4364 if (entity->kind == ENTITY_FUNCTION) {
4365 if (entity->function.body != NULL) {
4366 ir_type *owner = get_irg_frame_type(current_ir_graph);
4367 (void)get_function_entity(entity, owner);
4368 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4369 enqueue_inner_function(entity);
4371 (void)get_function_entity(entity, NULL);
4374 create_local_variable(entity);
4377 case STORAGE_CLASS_TYPEDEF:
4380 panic("invalid storage class found");
4383 static void create_local_declarations(entity_t *e)
4385 for (; e; e = e->base.next) {
4386 if (is_declaration(e))
4387 create_local_declaration(e);
4391 static void initialize_local_declaration(entity_t *entity)
4393 if (entity->base.symbol == NULL)
4396 // no need to emit code in dead blocks
4397 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4398 && !currently_reachable())
4401 switch ((declaration_kind_t) entity->declaration.kind) {
4402 case DECLARATION_KIND_LOCAL_VARIABLE:
4403 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4404 create_variable_initializer(entity);
4407 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4408 allocate_variable_length_array(entity);
4411 case DECLARATION_KIND_COMPOUND_MEMBER:
4412 case DECLARATION_KIND_GLOBAL_VARIABLE:
4413 case DECLARATION_KIND_FUNCTION:
4414 case DECLARATION_KIND_INNER_FUNCTION:
4417 case DECLARATION_KIND_PARAMETER:
4418 case DECLARATION_KIND_PARAMETER_ENTITY:
4419 panic("can't initialize parameters");
4421 case DECLARATION_KIND_UNKNOWN:
4422 panic("can't initialize unknown declaration");
4424 panic("invalid declaration kind");
4427 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4429 entity_t *entity = statement->declarations_begin;
4433 entity_t *const last = statement->declarations_end;
4434 for ( ;; entity = entity->base.next) {
4435 if (is_declaration(entity)) {
4436 initialize_local_declaration(entity);
4437 } else if (entity->kind == ENTITY_TYPEDEF) {
4438 /* ยง6.7.7:3 Any array size expressions associated with variable length
4439 * array declarators are evaluated each time the declaration of the
4440 * typedef name is reached in the order of execution. */
4441 type_t *const type = skip_typeref(entity->typedefe.type);
4442 if (is_type_array(type) && type->array.is_vla)
4443 get_vla_size(&type->array);
4452 static ir_node *if_statement_to_firm(if_statement_t *statement)
4454 create_local_declarations(statement->scope.entities);
4456 /* Create the condition. */
4457 ir_node *true_block = NULL;
4458 ir_node *false_block = NULL;
4459 if (currently_reachable()) {
4460 true_block = new_immBlock();
4461 false_block = new_immBlock();
4462 create_condition_evaluation(statement->condition, true_block, false_block);
4463 mature_immBlock(true_block);
4464 mature_immBlock(false_block);
4467 /* Create the true statement. */
4468 set_cur_block(true_block);
4469 statement_to_firm(statement->true_statement);
4470 ir_node *fallthrough_block = get_cur_block();
4472 /* Create the false statement. */
4473 set_cur_block(false_block);
4474 if (statement->false_statement != NULL) {
4475 statement_to_firm(statement->false_statement);
4478 /* Handle the block after the if-statement. Minor simplification and
4479 * optimisation: Reuse the false/true block as fallthrough block, if the
4480 * true/false statement does not pass control to the fallthrough block, e.g.
4481 * in the typical if (x) return; pattern. */
4482 if (fallthrough_block) {
4483 if (currently_reachable()) {
4484 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4485 ir_node *const f_jump = new_Jmp();
4486 ir_node *const in[] = { t_jump, f_jump };
4487 fallthrough_block = new_Block(2, in);
4489 set_cur_block(fallthrough_block);
4496 * Add an unconditional jump to the target block. If the source block is not
4497 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4498 * loops. This is necessary if the jump potentially enters a loop.
4500 static void jump_to(ir_node *const target_block)
4502 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4503 add_immBlock_pred(target_block, pred);
4504 set_cur_block(target_block);
4508 * Add an unconditional jump to the target block, if the current block is
4509 * reachable and do nothing otherwise. This is only valid if the jump does not
4510 * enter a loop (a back edge is ok).
4512 static void jump_if_reachable(ir_node *const target_block)
4514 if (currently_reachable())
4515 add_immBlock_pred(target_block, new_Jmp());
4518 static ir_node *get_break_label(void)
4520 if (break_label == NULL) {
4521 break_label = new_immBlock();
4526 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4528 create_local_declarations(statement->scope.entities);
4530 /* create the header block */
4531 ir_node *header_block = new_immBlock();
4534 ir_node *body_block = new_immBlock();
4535 jump_to(body_block);
4537 ir_node *old_continue_label = continue_label;
4538 ir_node *old_break_label = break_label;
4539 continue_label = header_block;
4542 statement_to_firm(statement->body);
4543 ir_node *const false_block = get_break_label();
4545 assert(continue_label == header_block);
4546 continue_label = old_continue_label;
4547 break_label = old_break_label;
4549 jump_if_reachable(header_block);
4551 /* create the condition */
4552 mature_immBlock(header_block);
4553 set_cur_block(header_block);
4555 create_condition_evaluation(statement->condition, body_block, false_block);
4556 mature_immBlock(body_block);
4557 mature_immBlock(false_block);
4559 set_cur_block(false_block);
4563 static ir_node *for_statement_to_firm(for_statement_t *statement)
4565 create_local_declarations(statement->scope.entities);
4567 if (currently_reachable()) {
4568 entity_t *entity = statement->scope.entities;
4569 for ( ; entity != NULL; entity = entity->base.next) {
4570 if (!is_declaration(entity))
4573 initialize_local_declaration(entity);
4576 if (statement->initialisation != NULL) {
4577 expression_to_firm(statement->initialisation);
4581 /* Create the header block */
4582 ir_node *const header_block = new_immBlock();
4583 jump_to(header_block);
4585 /* Create the condition. */
4586 ir_node *false_block;
4587 expression_t *const cond = statement->condition;
4588 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4589 false_block = new_immBlock();
4591 ir_node *const body_block = new_immBlock();
4592 create_condition_evaluation(cond, body_block, false_block);
4593 mature_immBlock(body_block);
4594 set_cur_block(body_block);
4599 keep_alive(header_block);
4600 keep_all_memory(header_block);
4603 /* Create the step block, if necessary. */
4604 ir_node * step_block = header_block;
4605 expression_t *const step = statement->step;
4607 step_block = new_immBlock();
4610 ir_node *const old_continue_label = continue_label;
4611 ir_node *const old_break_label = break_label;
4612 continue_label = step_block;
4613 break_label = false_block;
4615 /* Create the loop body. */
4616 statement_to_firm(statement->body);
4617 jump_if_reachable(step_block);
4619 /* Create the step code. */
4621 mature_immBlock(step_block);
4622 set_cur_block(step_block);
4623 expression_to_firm(step);
4624 jump_if_reachable(header_block);
4627 mature_immBlock(header_block);
4628 assert(false_block == NULL || false_block == break_label);
4629 false_block = break_label;
4630 if (false_block != NULL) {
4631 mature_immBlock(false_block);
4633 set_cur_block(false_block);
4635 assert(continue_label == step_block);
4636 continue_label = old_continue_label;
4637 break_label = old_break_label;
4641 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4643 if (!currently_reachable())
4646 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4647 ir_node *jump = new_d_Jmp(dbgi);
4648 add_immBlock_pred(target_block, jump);
4650 set_unreachable_now();
4654 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4656 /* determine number of cases */
4658 for (case_label_statement_t *l = statement->first_case; l != NULL;
4661 if (l->expression == NULL)
4663 if (l->is_empty_range)
4668 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4670 for (case_label_statement_t *l = statement->first_case; l != NULL;
4672 if (l->expression == NULL) {
4673 l->pn = pn_Switch_default;
4676 if (l->is_empty_range)
4678 ir_tarval *min = fold_constant_to_tarval(l->expression);
4679 ir_tarval *max = min;
4680 long pn = (long) i+1;
4681 if (l->end_range != NULL)
4682 max = fold_constant_to_tarval(l->end_range);
4683 ir_switch_table_set(res, i++, min, max, pn);
4689 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4691 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4692 ir_node *switch_node = NULL;
4694 if (currently_reachable()) {
4695 ir_node *expression = expression_to_firm(statement->expression);
4696 ir_switch_table *table = create_switch_table(statement);
4697 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4699 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4702 set_unreachable_now();
4704 ir_node *const old_switch = current_switch;
4705 ir_node *const old_break_label = break_label;
4706 const bool old_saw_default_label = saw_default_label;
4707 saw_default_label = false;
4708 current_switch = switch_node;
4711 statement_to_firm(statement->body);
4713 if (currently_reachable()) {
4714 add_immBlock_pred(get_break_label(), new_Jmp());
4717 if (!saw_default_label && switch_node) {
4718 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4719 add_immBlock_pred(get_break_label(), proj);
4722 if (break_label != NULL) {
4723 mature_immBlock(break_label);
4725 set_cur_block(break_label);
4727 assert(current_switch == switch_node);
4728 current_switch = old_switch;
4729 break_label = old_break_label;
4730 saw_default_label = old_saw_default_label;
4734 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4736 if (statement->is_empty_range)
4739 if (current_switch != NULL) {
4740 ir_node *block = new_immBlock();
4741 /* Fallthrough from previous case */
4742 jump_if_reachable(block);
4744 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4745 add_immBlock_pred(block, proj);
4746 if (statement->expression == NULL)
4747 saw_default_label = true;
4749 mature_immBlock(block);
4750 set_cur_block(block);
4753 return statement_to_firm(statement->statement);
4756 static ir_node *label_to_firm(const label_statement_t *statement)
4758 ir_node *block = get_label_block(statement->label);
4762 keep_all_memory(block);
4764 return statement_to_firm(statement->statement);
4767 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4769 if (!currently_reachable())
4772 ir_node *const irn = expression_to_firm(statement->expression);
4773 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4774 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
4776 set_irn_link(ijmp, ijmp_list);
4779 set_unreachable_now();
4783 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4785 bool needs_memory = statement->is_volatile;
4786 size_t n_clobbers = 0;
4787 asm_clobber_t *clobber = statement->clobbers;
4788 for ( ; clobber != NULL; clobber = clobber->next) {
4789 const char *clobber_str = clobber->clobber.begin;
4791 if (!be_is_valid_clobber(clobber_str)) {
4792 errorf(&statement->base.source_position,
4793 "invalid clobber '%s' specified", clobber->clobber);
4797 if (streq(clobber_str, "memory")) {
4798 needs_memory = true;
4802 ident *id = new_id_from_str(clobber_str);
4803 obstack_ptr_grow(&asm_obst, id);
4806 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4807 ident **clobbers = NULL;
4808 if (n_clobbers > 0) {
4809 clobbers = obstack_finish(&asm_obst);
4812 size_t n_inputs = 0;
4813 asm_argument_t *argument = statement->inputs;
4814 for ( ; argument != NULL; argument = argument->next)
4816 size_t n_outputs = 0;
4817 argument = statement->outputs;
4818 for ( ; argument != NULL; argument = argument->next)
4821 unsigned next_pos = 0;
4823 ir_node *ins[n_inputs + n_outputs + 1];
4826 ir_asm_constraint tmp_in_constraints[n_outputs];
4828 const expression_t *out_exprs[n_outputs];
4829 ir_node *out_addrs[n_outputs];
4830 size_t out_size = 0;
4832 argument = statement->outputs;
4833 for ( ; argument != NULL; argument = argument->next) {
4834 const char *constraints = argument->constraints.begin;
4835 asm_constraint_flags_t asm_flags
4836 = be_parse_asm_constraints(constraints);
4839 source_position_t const *const pos = &statement->base.source_position;
4840 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4841 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4843 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4844 errorf(pos, "some constraints in '%s' are invalid", constraints);
4847 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4848 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4853 unsigned pos = next_pos++;
4854 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4855 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4856 expression_t *expr = argument->expression;
4857 ir_node *addr = expression_to_addr(expr);
4858 /* in+output, construct an artifical same_as constraint on the
4860 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4862 ir_node *value = get_value_from_lvalue(expr, addr);
4864 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4866 ir_asm_constraint constraint;
4867 constraint.pos = pos;
4868 constraint.constraint = new_id_from_str(buf);
4869 constraint.mode = get_ir_mode_storage(expr->base.type);
4870 tmp_in_constraints[in_size] = constraint;
4871 ins[in_size] = value;
4876 out_exprs[out_size] = expr;
4877 out_addrs[out_size] = addr;
4879 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4880 /* pure memory ops need no input (but we have to make sure we
4881 * attach to the memory) */
4882 assert(! (asm_flags &
4883 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4884 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4885 needs_memory = true;
4887 /* we need to attach the address to the inputs */
4888 expression_t *expr = argument->expression;
4890 ir_asm_constraint constraint;
4891 constraint.pos = pos;
4892 constraint.constraint = new_id_from_str(constraints);
4893 constraint.mode = mode_M;
4894 tmp_in_constraints[in_size] = constraint;
4896 ins[in_size] = expression_to_addr(expr);
4900 errorf(&statement->base.source_position,
4901 "only modifiers but no place set in constraints '%s'",
4906 ir_asm_constraint constraint;
4907 constraint.pos = pos;
4908 constraint.constraint = new_id_from_str(constraints);
4909 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4911 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4913 assert(obstack_object_size(&asm_obst)
4914 == out_size * sizeof(ir_asm_constraint));
4915 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4918 obstack_grow(&asm_obst, tmp_in_constraints,
4919 in_size * sizeof(tmp_in_constraints[0]));
4920 /* find and count input and output arguments */
4921 argument = statement->inputs;
4922 for ( ; argument != NULL; argument = argument->next) {
4923 const char *constraints = argument->constraints.begin;
4924 asm_constraint_flags_t asm_flags
4925 = be_parse_asm_constraints(constraints);
4927 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4928 errorf(&statement->base.source_position,
4929 "some constraints in '%s' are not supported", constraints);
4932 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4933 errorf(&statement->base.source_position,
4934 "some constraints in '%s' are invalid", constraints);
4937 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4938 errorf(&statement->base.source_position,
4939 "write flag specified for input constraints '%s'",
4945 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4946 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4947 /* we can treat this as "normal" input */
4948 input = expression_to_firm(argument->expression);
4949 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4950 /* pure memory ops need no input (but we have to make sure we
4951 * attach to the memory) */
4952 assert(! (asm_flags &
4953 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4954 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4955 needs_memory = true;
4956 input = expression_to_addr(argument->expression);
4958 errorf(&statement->base.source_position,
4959 "only modifiers but no place set in constraints '%s'",
4964 ir_asm_constraint constraint;
4965 constraint.pos = next_pos++;
4966 constraint.constraint = new_id_from_str(constraints);
4967 constraint.mode = get_irn_mode(input);
4969 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4970 ins[in_size++] = input;
4973 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4974 assert(obstack_object_size(&asm_obst)
4975 == in_size * sizeof(ir_asm_constraint));
4976 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4978 /* create asm node */
4979 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4981 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4983 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4984 out_size, output_constraints,
4985 n_clobbers, clobbers, asm_text);
4987 if (statement->is_volatile) {
4988 set_irn_pinned(node, op_pin_state_pinned);
4990 set_irn_pinned(node, op_pin_state_floats);
4993 /* create output projs & connect them */
4995 ir_node *projm = new_Proj(node, mode_M, out_size);
5000 for (i = 0; i < out_size; ++i) {
5001 const expression_t *out_expr = out_exprs[i];
5003 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5004 ir_node *proj = new_Proj(node, mode, pn);
5005 ir_node *addr = out_addrs[i];
5007 set_value_for_expression_addr(out_expr, proj, addr);
5013 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5015 statement_to_firm(statement->try_statement);
5016 source_position_t const *const pos = &statement->base.source_position;
5017 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5021 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5023 errorf(&statement->base.source_position, "__leave not supported yet");
5028 * Transform a statement.
5030 static ir_node *statement_to_firm(statement_t *const stmt)
5033 assert(!stmt->base.transformed);
5034 stmt->base.transformed = true;
5037 switch (stmt->kind) {
5038 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5039 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5040 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5041 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5042 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5043 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5044 case STATEMENT_EMPTY: return NULL; /* nothing */
5045 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5046 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5047 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5048 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5049 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5050 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5051 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5052 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5054 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5055 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5056 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5058 case STATEMENT_ERROR: panic("error statement found");
5060 panic("statement not implemented");
5063 static int count_local_variables(const entity_t *entity,
5064 const entity_t *const last)
5067 entity_t const *const end = last != NULL ? last->base.next : NULL;
5068 for (; entity != end; entity = entity->base.next) {
5069 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5070 !var_needs_entity(&entity->variable))
5076 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5078 int *const count = env;
5080 switch (stmt->kind) {
5081 case STATEMENT_DECLARATION: {
5082 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5083 *count += count_local_variables(decl_stmt->declarations_begin,
5084 decl_stmt->declarations_end);
5089 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5098 * Return the number of local (alias free) variables used by a function.
5100 static int get_function_n_local_vars(entity_t *entity)
5102 const function_t *function = &entity->function;
5105 /* count parameters */
5106 count += count_local_variables(function->parameters.entities, NULL);
5108 /* count local variables declared in body */
5109 walk_statements(function->body, count_local_variables_in_stmt, &count);
5114 * Build Firm code for the parameters of a function.
5116 static void initialize_function_parameters(entity_t *entity)
5118 assert(entity->kind == ENTITY_FUNCTION);
5119 ir_graph *irg = current_ir_graph;
5120 ir_node *args = get_irg_args(irg);
5122 ir_type *function_irtype;
5124 if (entity->function.need_closure) {
5125 /* add an extra parameter for the static link */
5126 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5129 /* Matze: IMO this is wrong, nested functions should have an own
5130 * type and not rely on strange parameters... */
5131 function_irtype = create_method_type(&entity->declaration.type->function, true);
5133 function_irtype = get_ir_type(entity->declaration.type);
5138 entity_t *parameter = entity->function.parameters.entities;
5139 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5140 if (parameter->kind != ENTITY_PARAMETER)
5143 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5144 type_t *type = skip_typeref(parameter->declaration.type);
5146 dbg_info *const dbgi = get_dbg_info(¶meter->base.source_position);
5147 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5148 if (var_needs_entity(¶meter->variable)) {
5149 ir_type *frame_type = get_irg_frame_type(irg);
5151 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5152 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5153 parameter->variable.v.entity = param;
5157 ir_mode *param_mode = get_type_mode(param_irtype);
5159 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5161 ir_mode *mode = get_ir_mode_storage(type);
5162 value = create_conv(NULL, value, mode);
5164 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5165 parameter->variable.v.value_number = next_value_number_function;
5166 set_irg_loc_description(current_ir_graph, next_value_number_function,
5168 ++next_value_number_function;
5170 set_value(parameter->variable.v.value_number, value);
5175 * Handle additional decl modifiers for IR-graphs
5177 * @param irg the IR-graph
5178 * @param dec_modifiers additional modifiers
5180 static void handle_decl_modifier_irg(ir_graph *irg,
5181 decl_modifiers_t decl_modifiers)
5183 if (decl_modifiers & DM_NAKED) {
5184 /* TRUE if the declaration includes the Microsoft
5185 __declspec(naked) specifier. */
5186 add_irg_additional_properties(irg, mtp_property_naked);
5188 if (decl_modifiers & DM_FORCEINLINE) {
5189 /* TRUE if the declaration includes the
5190 Microsoft __forceinline specifier. */
5191 set_irg_inline_property(irg, irg_inline_forced);
5193 if (decl_modifiers & DM_NOINLINE) {
5194 /* TRUE if the declaration includes the Microsoft
5195 __declspec(noinline) specifier. */
5196 set_irg_inline_property(irg, irg_inline_forbidden);
5200 static void add_function_pointer(ir_type *segment, ir_entity *method,
5201 const char *unique_template)
5203 ir_type *method_type = get_entity_type(method);
5204 ir_type *ptr_type = new_type_pointer(method_type);
5206 /* these entities don't really have a name but firm only allows
5208 * Note that we mustn't give these entities a name since for example
5209 * Mach-O doesn't allow them. */
5210 ident *ide = id_unique(unique_template);
5211 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5212 ir_graph *irg = get_const_code_irg();
5213 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5216 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5217 set_entity_compiler_generated(ptr, 1);
5218 set_entity_visibility(ptr, ir_visibility_private);
5219 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5220 set_atomic_ent_value(ptr, val);
5224 * Generate possible IJmp branches to a given label block.
5226 static void gen_ijmp_branches(ir_node *block)
5229 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5230 add_immBlock_pred(block, ijmp);
5235 * Create code for a function and all inner functions.
5237 * @param entity the function entity
5239 static void create_function(entity_t *entity)
5241 assert(entity->kind == ENTITY_FUNCTION);
5242 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5244 if (entity->function.body == NULL)
5247 inner_functions = NULL;
5248 current_trampolines = NULL;
5250 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5251 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5252 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5254 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5255 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5256 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5259 current_function_entity = entity;
5260 current_function_name = NULL;
5261 current_funcsig = NULL;
5263 assert(all_labels == NULL);
5264 all_labels = NEW_ARR_F(label_t *, 0);
5267 int n_local_vars = get_function_n_local_vars(entity);
5268 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5269 current_ir_graph = irg;
5271 ir_graph *old_current_function = current_function;
5272 current_function = irg;
5274 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5275 current_vararg_entity = NULL;
5277 set_irg_fp_model(irg, firm_fp_model);
5278 tarval_enable_fp_ops(1);
5279 set_irn_dbg_info(get_irg_start_block(irg),
5280 get_entity_dbg_info(function_entity));
5282 /* set inline flags */
5283 if (entity->function.is_inline)
5284 set_irg_inline_property(irg, irg_inline_recomended);
5285 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5287 next_value_number_function = 0;
5288 initialize_function_parameters(entity);
5289 current_static_link = entity->function.static_link;
5291 statement_to_firm(entity->function.body);
5293 ir_node *end_block = get_irg_end_block(irg);
5295 /* do we have a return statement yet? */
5296 if (currently_reachable()) {
5297 type_t *type = skip_typeref(entity->declaration.type);
5298 assert(is_type_function(type));
5299 type_t *const return_type = skip_typeref(type->function.return_type);
5302 if (is_type_void(return_type)) {
5303 ret = new_Return(get_store(), 0, NULL);
5305 ir_mode *const mode = get_ir_mode_storage(return_type);
5308 /* ยง5.1.2.2.3 main implicitly returns 0 */
5309 if (is_main(entity)) {
5310 in[0] = new_Const(get_mode_null(mode));
5312 in[0] = new_Unknown(mode);
5314 ret = new_Return(get_store(), 1, in);
5316 add_immBlock_pred(end_block, ret);
5319 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5320 label_t *label = all_labels[i];
5321 if (label->address_taken) {
5322 gen_ijmp_branches(label->block);
5324 mature_immBlock(label->block);
5327 DEL_ARR_F(all_labels);
5330 irg_finalize_cons(irg);
5332 /* finalize the frame type */
5333 ir_type *frame_type = get_irg_frame_type(irg);
5334 int n = get_compound_n_members(frame_type);
5337 for (int i = 0; i < n; ++i) {
5338 ir_entity *member = get_compound_member(frame_type, i);
5339 ir_type *entity_type = get_entity_type(member);
5341 int align = get_type_alignment_bytes(entity_type);
5342 if (align > align_all)
5346 misalign = offset % align;
5348 offset += align - misalign;
5352 set_entity_offset(member, offset);
5353 offset += get_type_size_bytes(entity_type);
5355 set_type_size_bytes(frame_type, offset);
5356 set_type_alignment_bytes(frame_type, align_all);
5358 irg_verify(irg, VERIFY_ENFORCE_SSA);
5359 current_vararg_entity = old_current_vararg_entity;
5360 current_function = old_current_function;
5362 if (current_trampolines != NULL) {
5363 DEL_ARR_F(current_trampolines);
5364 current_trampolines = NULL;
5367 /* create inner functions if any */
5368 entity_t **inner = inner_functions;
5369 if (inner != NULL) {
5370 ir_type *rem_outer_frame = current_outer_frame;
5371 current_outer_frame = get_irg_frame_type(current_ir_graph);
5372 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5373 create_function(inner[i]);
5377 current_outer_frame = rem_outer_frame;
5381 static void scope_to_firm(scope_t *scope)
5383 /* first pass: create declarations */
5384 entity_t *entity = scope->entities;
5385 for ( ; entity != NULL; entity = entity->base.next) {
5386 if (entity->base.symbol == NULL)
5389 if (entity->kind == ENTITY_FUNCTION) {
5390 if (entity->function.btk != BUILTIN_NONE) {
5391 /* builtins have no representation */
5394 (void)get_function_entity(entity, NULL);
5395 } else if (entity->kind == ENTITY_VARIABLE) {
5396 create_global_variable(entity);
5397 } else if (entity->kind == ENTITY_NAMESPACE) {
5398 scope_to_firm(&entity->namespacee.members);
5402 /* second pass: create code/initializers */
5403 entity = scope->entities;
5404 for ( ; entity != NULL; entity = entity->base.next) {
5405 if (entity->base.symbol == NULL)
5408 if (entity->kind == ENTITY_FUNCTION) {
5409 if (entity->function.btk != BUILTIN_NONE) {
5410 /* builtins have no representation */
5413 create_function(entity);
5414 } else if (entity->kind == ENTITY_VARIABLE) {
5415 assert(entity->declaration.kind
5416 == DECLARATION_KIND_GLOBAL_VARIABLE);
5417 current_ir_graph = get_const_code_irg();
5418 create_variable_initializer(entity);
5423 void init_ast2firm(void)
5425 obstack_init(&asm_obst);
5426 init_atomic_modes();
5428 ir_set_debug_retrieve(dbg_retrieve);
5429 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5431 /* create idents for all known runtime functions */
5432 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5433 rts_idents[i] = new_id_from_str(rts_data[i].name);
5436 entitymap_init(&entitymap);
5439 static void init_ir_types(void)
5441 static int ir_types_initialized = 0;
5442 if (ir_types_initialized)
5444 ir_types_initialized = 1;
5446 ir_type_char = get_ir_type(type_char);
5447 ir_type_wchar_t = get_ir_type(type_wchar_t);
5449 be_params = be_get_backend_param();
5450 mode_float_arithmetic = be_params->mode_float_arithmetic;
5452 stack_param_align = be_params->stack_param_align;
5455 void exit_ast2firm(void)
5457 entitymap_destroy(&entitymap);
5458 obstack_free(&asm_obst, NULL);
5461 static void global_asm_to_firm(statement_t *s)
5463 for (; s != NULL; s = s->base.next) {
5464 assert(s->kind == STATEMENT_ASM);
5466 char const *const text = s->asms.asm_text.begin;
5467 size_t const size = s->asms.asm_text.size;
5468 ident *const id = new_id_from_chars(text, size);
5473 static const char *get_cwd(void)
5475 static char buf[1024];
5476 if (buf[0] == '\0') {
5477 return getcwd(buf, sizeof(buf));
5482 void translation_unit_to_firm(translation_unit_t *unit)
5484 if (c_mode & _CXX) {
5485 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5486 } else if (c_mode & _C99) {
5487 be_dwarf_set_source_language(DW_LANG_C99);
5488 } else if (c_mode & _C89) {
5489 be_dwarf_set_source_language(DW_LANG_C89);
5491 be_dwarf_set_source_language(DW_LANG_C);
5493 const char *cwd = get_cwd();
5495 be_dwarf_set_compilation_directory(cwd);
5498 /* initialize firm arithmetic */
5499 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5500 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5502 /* just to be sure */
5503 continue_label = NULL;
5505 current_switch = NULL;
5506 current_translation_unit = unit;
5510 scope_to_firm(&unit->scope);
5511 global_asm_to_firm(unit->global_asm);
5513 current_ir_graph = NULL;
5514 current_translation_unit = NULL;