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.statement != 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.statement != 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 * Creates a strict Conv (to the node's mode) if necessary.
1425 * @param dbgi debug info
1426 * @param node the node to strict conv
1428 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1430 ir_mode *mode = get_irn_mode(node);
1432 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1434 if (!mode_is_float(mode))
1437 /* check if there is already a Conv */
1438 if (is_Conv(node)) {
1439 /* convert it into a strict Conv */
1440 set_Conv_strict(node, 1);
1444 /* otherwise create a new one */
1445 return new_d_strictConv(dbgi, node, mode);
1449 * Returns the correct base address depending on whether it is a parameter or a
1450 * normal local variable.
1452 static ir_node *get_local_frame(ir_entity *const ent)
1454 ir_graph *const irg = current_ir_graph;
1455 const ir_type *const owner = get_entity_owner(ent);
1456 if (owner == current_outer_frame) {
1457 assert(current_static_link != NULL);
1458 return current_static_link;
1460 return get_irg_frame(irg);
1465 * Keep all memory edges of the given block.
1467 static void keep_all_memory(ir_node *block)
1469 ir_node *old = get_cur_block();
1471 set_cur_block(block);
1472 keep_alive(get_store());
1473 /* TODO: keep all memory edges from restricted pointers */
1477 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1479 entity_t *entity = ref->entity;
1480 if (entity->enum_value.tv == NULL) {
1481 type_t *type = skip_typeref(entity->enum_value.enum_type);
1482 assert(type->kind == TYPE_ENUM);
1483 determine_enum_values(&type->enumt);
1486 return new_Const(entity->enum_value.tv);
1489 static ir_node *reference_addr(const reference_expression_t *ref)
1491 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1492 entity_t *entity = ref->entity;
1493 assert(is_declaration(entity));
1495 if (entity->kind == ENTITY_FUNCTION
1496 && entity->function.btk != BUILTIN_NONE) {
1497 ir_entity *irentity = get_function_entity(entity, NULL);
1498 /* for gcc compatibility we have to produce (dummy) addresses for some
1499 * builtins which don't have entities */
1500 if (irentity == NULL) {
1501 source_position_t const *const pos = &ref->base.source_position;
1502 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1504 /* simply create a NULL pointer */
1505 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1506 ir_node *res = new_Const(get_mode_null(mode));
1512 switch((declaration_kind_t) entity->declaration.kind) {
1513 case DECLARATION_KIND_UNKNOWN:
1515 case DECLARATION_KIND_PARAMETER:
1516 case DECLARATION_KIND_LOCAL_VARIABLE:
1517 /* you can store to a local variable (so we don't panic but return NULL
1518 * as an indicator for no real address) */
1520 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1521 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1525 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1526 case DECLARATION_KIND_PARAMETER_ENTITY: {
1527 ir_entity *irentity = entity->variable.v.entity;
1528 ir_node *frame = get_local_frame(irentity);
1529 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1533 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1534 return entity->variable.v.vla_base;
1536 case DECLARATION_KIND_FUNCTION: {
1537 return create_symconst(dbgi, entity->function.irentity);
1540 case DECLARATION_KIND_INNER_FUNCTION: {
1541 type_t *const type = skip_typeref(entity->declaration.type);
1542 ir_mode *const mode = get_ir_mode_storage(type);
1543 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1544 /* inner function not using the closure */
1545 return create_symconst(dbgi, entity->function.irentity);
1547 /* need trampoline here */
1548 return create_trampoline(dbgi, mode, entity->function.irentity);
1552 case DECLARATION_KIND_COMPOUND_MEMBER:
1553 panic("not implemented reference type");
1556 panic("reference to declaration with unknown type found");
1559 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1561 dbg_info *const dbgi = get_dbg_info(&ref->base.source_position);
1562 entity_t *const entity = ref->entity;
1563 assert(is_declaration(entity));
1565 switch ((declaration_kind_t)entity->declaration.kind) {
1566 case DECLARATION_KIND_LOCAL_VARIABLE:
1567 case DECLARATION_KIND_PARAMETER: {
1568 type_t *const type = skip_typeref(entity->declaration.type);
1569 ir_mode *const mode = get_ir_mode_storage(type);
1570 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1571 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1575 ir_node *const addr = reference_addr(ref);
1576 return deref_address(dbgi, entity->declaration.type, addr);
1582 * Transform calls to builtin functions.
1584 static ir_node *process_builtin_call(const call_expression_t *call)
1586 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1588 assert(call->function->kind == EXPR_REFERENCE);
1589 reference_expression_t *builtin = &call->function->reference;
1591 type_t *expr_type = skip_typeref(builtin->base.type);
1592 assert(is_type_pointer(expr_type));
1594 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1596 switch (builtin->entity->function.btk) {
1599 case BUILTIN_ALLOCA: {
1600 expression_t *argument = call->arguments->expression;
1601 ir_node *size = expression_to_firm(argument);
1603 ir_node *store = get_store();
1604 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1606 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1608 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1613 type_t *type = function_type->function.return_type;
1614 ir_mode *mode = get_ir_mode_arithmetic(type);
1615 ir_tarval *tv = get_mode_infinite(mode);
1616 ir_node *res = new_d_Const(dbgi, tv);
1620 /* Ignore string for now... */
1621 assert(is_type_function(function_type));
1622 type_t *type = function_type->function.return_type;
1623 ir_mode *mode = get_ir_mode_arithmetic(type);
1624 ir_tarval *tv = get_mode_NAN(mode);
1625 ir_node *res = new_d_Const(dbgi, tv);
1628 case BUILTIN_EXPECT: {
1629 expression_t *argument = call->arguments->expression;
1630 return _expression_to_firm(argument);
1632 case BUILTIN_VA_END:
1633 /* evaluate the argument of va_end for its side effects */
1634 _expression_to_firm(call->arguments->expression);
1636 case BUILTIN_OBJECT_SIZE: {
1637 /* determine value of "type" */
1638 expression_t *type_expression = call->arguments->next->expression;
1639 long type_val = fold_constant_to_int(type_expression);
1640 type_t *type = function_type->function.return_type;
1641 ir_mode *mode = get_ir_mode_arithmetic(type);
1642 /* just produce a "I don't know" result */
1643 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1644 get_mode_minus_one(mode);
1646 return new_d_Const(dbgi, result);
1648 case BUILTIN_ROTL: {
1649 ir_node *val = expression_to_firm(call->arguments->expression);
1650 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1651 ir_mode *mode = get_irn_mode(val);
1652 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1653 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1655 case BUILTIN_ROTR: {
1656 ir_node *val = expression_to_firm(call->arguments->expression);
1657 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1658 ir_mode *mode = get_irn_mode(val);
1659 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1660 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1661 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1662 return new_d_Rotl(dbgi, val, sub, mode);
1667 case BUILTIN_LIBC_CHECK:
1668 panic("builtin did not produce an entity");
1670 panic("invalid builtin found");
1674 * Transform a call expression.
1675 * Handles some special cases, like alloca() calls, which must be resolved
1676 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1677 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1680 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1682 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1683 assert(currently_reachable());
1685 expression_t *function = call->function;
1686 ir_node *callee = NULL;
1687 bool firm_builtin = false;
1688 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1689 if (function->kind == EXPR_REFERENCE) {
1690 const reference_expression_t *ref = &function->reference;
1691 entity_t *entity = ref->entity;
1693 if (entity->kind == ENTITY_FUNCTION) {
1694 builtin_kind_t builtin = entity->function.btk;
1695 if (builtin == BUILTIN_FIRM) {
1696 firm_builtin = true;
1697 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1698 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1699 && builtin != BUILTIN_LIBC_CHECK) {
1700 return process_builtin_call(call);
1705 callee = expression_to_firm(function);
1707 type_t *type = skip_typeref(function->base.type);
1708 assert(is_type_pointer(type));
1709 pointer_type_t *pointer_type = &type->pointer;
1710 type_t *points_to = skip_typeref(pointer_type->points_to);
1711 assert(is_type_function(points_to));
1712 function_type_t *function_type = &points_to->function;
1714 int n_parameters = 0;
1715 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1716 ir_type *new_method_type = NULL;
1717 if (function_type->variadic || function_type->unspecified_parameters) {
1718 const call_argument_t *argument = call->arguments;
1719 for ( ; argument != NULL; argument = argument->next) {
1723 /* we need to construct a new method type matching the call
1725 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1726 int n_res = get_method_n_ress(ir_method_type);
1727 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1728 set_method_calling_convention(new_method_type,
1729 get_method_calling_convention(ir_method_type));
1730 set_method_additional_properties(new_method_type,
1731 get_method_additional_properties(ir_method_type));
1732 set_method_variadicity(new_method_type,
1733 get_method_variadicity(ir_method_type));
1735 for (int i = 0; i < n_res; ++i) {
1736 set_method_res_type(new_method_type, i,
1737 get_method_res_type(ir_method_type, i));
1739 argument = call->arguments;
1740 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1741 expression_t *expression = argument->expression;
1742 ir_type *irtype = get_ir_type(expression->base.type);
1743 set_method_param_type(new_method_type, i, irtype);
1745 ir_method_type = new_method_type;
1747 n_parameters = get_method_n_params(ir_method_type);
1750 ir_node *in[n_parameters];
1752 const call_argument_t *argument = call->arguments;
1753 for (int n = 0; n < n_parameters; ++n) {
1754 expression_t *expression = argument->expression;
1755 ir_node *arg_node = expression_to_firm(expression);
1757 type_t *arg_type = skip_typeref(expression->base.type);
1758 if (!is_type_compound(arg_type)) {
1759 ir_mode *const mode = get_ir_mode_storage(arg_type);
1760 arg_node = create_conv(dbgi, arg_node, mode);
1761 arg_node = do_strict_conv(dbgi, arg_node);
1766 argument = argument->next;
1770 if (function_type->modifiers & DM_CONST) {
1771 store = get_irg_no_mem(current_ir_graph);
1773 store = get_store();
1777 type_t *return_type = skip_typeref(function_type->return_type);
1778 ir_node *result = NULL;
1780 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1782 if (! (function_type->modifiers & DM_CONST)) {
1783 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1787 if (!is_type_void(return_type)) {
1788 assert(is_type_scalar(return_type));
1789 ir_mode *mode = get_ir_mode_storage(return_type);
1790 result = new_Proj(node, mode, pn_Builtin_max+1);
1791 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1792 result = create_conv(NULL, result, mode_arith);
1795 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1796 if (! (function_type->modifiers & DM_CONST)) {
1797 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1801 if (!is_type_void(return_type)) {
1802 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1803 ir_mode *const mode = get_ir_mode_storage(return_type);
1804 result = new_Proj(resproj, mode, 0);
1805 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1806 result = create_conv(NULL, result, mode_arith);
1810 if (function_type->modifiers & DM_NORETURN) {
1811 /* A dead end: Keep the Call and the Block. Also place all further
1812 * nodes into a new and unreachable block. */
1814 keep_alive(get_cur_block());
1815 ir_node *block = new_Block(0, NULL);
1816 set_cur_block(block);
1822 static ir_node *statement_to_firm(statement_t *statement);
1823 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1825 static ir_node *expression_to_addr(const expression_t *expression);
1826 static ir_node *create_condition_evaluation(const expression_t *expression,
1827 ir_node *true_block,
1828 ir_node *false_block);
1830 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1833 if (!is_type_compound(type)) {
1834 ir_mode *mode = get_ir_mode_storage(type);
1835 value = create_conv(dbgi, value, mode);
1836 value = do_strict_conv(dbgi, value);
1839 ir_node *memory = get_store();
1841 if (is_type_scalar(type)) {
1842 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1843 ? cons_volatile : cons_none;
1844 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1845 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1846 set_store(store_mem);
1848 ir_type *irtype = get_ir_type(type);
1849 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1850 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1851 set_store(copyb_mem);
1855 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1857 ir_tarval *all_one = get_mode_all_one(mode);
1858 int mode_size = get_mode_size_bits(mode);
1859 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1861 assert(offset >= 0);
1863 assert(offset + size <= mode_size);
1864 if (size == mode_size) {
1868 long shiftr = get_mode_size_bits(mode) - size;
1869 long shiftl = offset;
1870 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1871 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1872 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1873 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1878 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1879 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1882 ir_type *entity_type = get_entity_type(entity);
1883 ir_type *base_type = get_primitive_base_type(entity_type);
1884 ir_mode *mode = get_type_mode(base_type);
1885 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1887 value = create_conv(dbgi, value, mode);
1889 /* kill upper bits of value and shift to right position */
1890 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1891 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1892 unsigned base_bits = get_mode_size_bits(mode);
1893 unsigned shiftwidth = base_bits - bitsize;
1895 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1896 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1898 unsigned shrwidth = base_bits - bitsize - bitoffset;
1899 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1900 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1902 /* load current value */
1903 ir_node *mem = get_store();
1904 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1905 set_volatile ? cons_volatile : cons_none);
1906 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1907 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1908 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1909 ir_tarval *inv_mask = tarval_not(shift_mask);
1910 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1911 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1913 /* construct new value and store */
1914 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1915 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1916 set_volatile ? cons_volatile : cons_none);
1917 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1918 set_store(store_mem);
1924 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1925 if (mode_is_signed(mode)) {
1926 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1928 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1933 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1936 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1937 entity_t *entity = expression->compound_entry;
1938 type_t *base_type = entity->declaration.type;
1939 ir_mode *mode = get_ir_mode_storage(base_type);
1940 ir_node *mem = get_store();
1941 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1942 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1943 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1944 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1946 ir_mode *amode = mode;
1947 /* optimisation, since shifting in modes < machine_size is usually
1949 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1952 unsigned amode_size = get_mode_size_bits(amode);
1953 load_res = create_conv(dbgi, load_res, amode);
1955 set_store(load_mem);
1957 /* kill upper bits */
1958 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1959 unsigned bitoffset = entity->compound_member.bit_offset;
1960 unsigned bitsize = entity->compound_member.bit_size;
1961 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1962 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1963 ir_node *countl = new_d_Const(dbgi, tvl);
1964 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1966 unsigned shift_bitsr = bitoffset + shift_bitsl;
1967 assert(shift_bitsr <= amode_size);
1968 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1969 ir_node *countr = new_d_Const(dbgi, tvr);
1971 if (mode_is_signed(mode)) {
1972 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1974 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1977 type_t *type = expression->base.type;
1978 ir_mode *resmode = get_ir_mode_arithmetic(type);
1979 return create_conv(dbgi, shiftr, resmode);
1982 /* make sure the selected compound type is constructed */
1983 static void construct_select_compound(const select_expression_t *expression)
1985 type_t *type = skip_typeref(expression->compound->base.type);
1986 if (is_type_pointer(type)) {
1987 type = type->pointer.points_to;
1989 (void) get_ir_type(type);
1992 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1993 ir_node *value, ir_node *addr)
1995 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1996 type_t *type = skip_typeref(expression->base.type);
1998 if (!is_type_compound(type)) {
1999 ir_mode *mode = get_ir_mode_storage(type);
2000 value = create_conv(dbgi, value, mode);
2001 value = do_strict_conv(dbgi, value);
2004 if (expression->kind == EXPR_REFERENCE) {
2005 const reference_expression_t *ref = &expression->reference;
2007 entity_t *entity = ref->entity;
2008 assert(is_declaration(entity));
2009 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2010 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2011 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2012 set_value(entity->variable.v.value_number, value);
2018 addr = expression_to_addr(expression);
2019 assert(addr != NULL);
2021 if (expression->kind == EXPR_SELECT) {
2022 const select_expression_t *select = &expression->select;
2024 construct_select_compound(select);
2026 entity_t *entity = select->compound_entry;
2027 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2028 if (entity->compound_member.bitfield) {
2029 ir_entity *irentity = entity->compound_member.entity;
2031 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2032 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2033 set_volatile, true);
2038 assign_value(dbgi, addr, type, value);
2042 static void set_value_for_expression(const expression_t *expression,
2045 set_value_for_expression_addr(expression, value, NULL);
2048 static ir_node *get_value_from_lvalue(const expression_t *expression,
2051 if (expression->kind == EXPR_REFERENCE) {
2052 const reference_expression_t *ref = &expression->reference;
2054 entity_t *entity = ref->entity;
2055 assert(entity->kind == ENTITY_VARIABLE
2056 || entity->kind == ENTITY_PARAMETER);
2057 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2059 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2060 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2061 value_number = entity->variable.v.value_number;
2062 assert(addr == NULL);
2063 type_t *type = skip_typeref(expression->base.type);
2064 ir_mode *mode = get_ir_mode_storage(type);
2065 ir_node *res = get_value(value_number, mode);
2066 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2070 assert(addr != NULL);
2071 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2074 if (expression->kind == EXPR_SELECT &&
2075 expression->select.compound_entry->compound_member.bitfield) {
2076 construct_select_compound(&expression->select);
2077 value = bitfield_extract_to_firm(&expression->select, addr);
2079 value = deref_address(dbgi, expression->base.type, addr);
2086 static ir_node *create_incdec(const unary_expression_t *expression)
2088 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2089 const expression_t *value_expr = expression->value;
2090 ir_node *addr = expression_to_addr(value_expr);
2091 ir_node *value = get_value_from_lvalue(value_expr, addr);
2093 type_t *type = skip_typeref(expression->base.type);
2094 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2097 if (is_type_pointer(type)) {
2098 pointer_type_t *pointer_type = &type->pointer;
2099 offset = get_type_size_node(pointer_type->points_to);
2101 assert(is_type_arithmetic(type));
2102 offset = new_Const(get_mode_one(mode));
2106 ir_node *store_value;
2107 switch(expression->base.kind) {
2108 case EXPR_UNARY_POSTFIX_INCREMENT:
2110 store_value = new_d_Add(dbgi, value, offset, mode);
2112 case EXPR_UNARY_POSTFIX_DECREMENT:
2114 store_value = new_d_Sub(dbgi, value, offset, mode);
2116 case EXPR_UNARY_PREFIX_INCREMENT:
2117 result = new_d_Add(dbgi, value, offset, mode);
2118 store_value = result;
2120 case EXPR_UNARY_PREFIX_DECREMENT:
2121 result = new_d_Sub(dbgi, value, offset, mode);
2122 store_value = result;
2125 panic("no incdec expr in create_incdec");
2128 set_value_for_expression_addr(value_expr, store_value, addr);
2133 static bool is_local_variable(expression_t *expression)
2135 if (expression->kind != EXPR_REFERENCE)
2137 reference_expression_t *ref_expr = &expression->reference;
2138 entity_t *entity = ref_expr->entity;
2139 if (entity->kind != ENTITY_VARIABLE)
2141 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2142 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2145 static ir_relation get_relation(const expression_kind_t kind)
2148 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2149 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2150 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2151 case EXPR_BINARY_ISLESS:
2152 case EXPR_BINARY_LESS: return ir_relation_less;
2153 case EXPR_BINARY_ISLESSEQUAL:
2154 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2155 case EXPR_BINARY_ISGREATER:
2156 case EXPR_BINARY_GREATER: return ir_relation_greater;
2157 case EXPR_BINARY_ISGREATEREQUAL:
2158 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2159 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2164 panic("trying to get ir_relation from non-comparison binexpr type");
2168 * Handle the assume optimizer hint: check if a Confirm
2169 * node can be created.
2171 * @param dbi debug info
2172 * @param expr the IL assume expression
2174 * we support here only some simple cases:
2179 static ir_node *handle_assume_compare(dbg_info *dbi,
2180 const binary_expression_t *expression)
2182 expression_t *op1 = expression->left;
2183 expression_t *op2 = expression->right;
2184 entity_t *var2, *var = NULL;
2185 ir_node *res = NULL;
2186 ir_relation relation = get_relation(expression->base.kind);
2188 if (is_local_variable(op1) && is_local_variable(op2)) {
2189 var = op1->reference.entity;
2190 var2 = op2->reference.entity;
2192 type_t *const type = skip_typeref(var->declaration.type);
2193 ir_mode *const mode = get_ir_mode_storage(type);
2195 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2196 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2198 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2199 set_value(var2->variable.v.value_number, res);
2201 res = new_d_Confirm(dbi, irn1, irn2, relation);
2202 set_value(var->variable.v.value_number, res);
2207 expression_t *con = NULL;
2208 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2209 var = op1->reference.entity;
2211 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2212 relation = get_inversed_relation(relation);
2213 var = op2->reference.entity;
2218 type_t *const type = skip_typeref(var->declaration.type);
2219 ir_mode *const mode = get_ir_mode_storage(type);
2221 res = get_value(var->variable.v.value_number, mode);
2222 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2223 set_value(var->variable.v.value_number, res);
2229 * Handle the assume optimizer hint.
2231 * @param dbi debug info
2232 * @param expr the IL assume expression
2234 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2236 switch(expression->kind) {
2237 case EXPR_BINARY_EQUAL:
2238 case EXPR_BINARY_NOTEQUAL:
2239 case EXPR_BINARY_LESS:
2240 case EXPR_BINARY_LESSEQUAL:
2241 case EXPR_BINARY_GREATER:
2242 case EXPR_BINARY_GREATEREQUAL:
2243 return handle_assume_compare(dbi, &expression->binary);
2249 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2250 type_t *from_type, type_t *type)
2252 type = skip_typeref(type);
2253 if (is_type_void(type)) {
2254 /* make sure firm type is constructed */
2255 (void) get_ir_type(type);
2258 if (!is_type_scalar(type)) {
2259 /* make sure firm type is constructed */
2260 (void) get_ir_type(type);
2264 from_type = skip_typeref(from_type);
2265 ir_mode *mode = get_ir_mode_storage(type);
2266 /* check for conversion from / to __based types */
2267 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2268 const variable_t *from_var = from_type->pointer.base_variable;
2269 const variable_t *to_var = type->pointer.base_variable;
2270 if (from_var != to_var) {
2271 if (from_var != NULL) {
2272 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2273 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2274 value_node = new_d_Add(dbgi, value_node, base, mode);
2276 if (to_var != NULL) {
2277 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2278 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2279 value_node = new_d_Sub(dbgi, value_node, base, mode);
2284 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2285 /* bool adjustments (we save a mode_Bu, but have to temporarily
2286 * convert to mode_b so we only get a 0/1 value */
2287 value_node = create_conv(dbgi, value_node, mode_b);
2290 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2291 ir_node *node = create_conv(dbgi, value_node, mode);
2292 node = do_strict_conv(dbgi, node);
2293 node = create_conv(dbgi, node, mode_arith);
2298 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2300 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2301 type_t *type = skip_typeref(expression->base.type);
2303 const expression_t *value = expression->value;
2305 switch(expression->base.kind) {
2306 case EXPR_UNARY_TAKE_ADDRESS:
2307 return expression_to_addr(value);
2309 case EXPR_UNARY_NEGATE: {
2310 ir_node *value_node = expression_to_firm(value);
2311 ir_mode *mode = get_ir_mode_arithmetic(type);
2312 return new_d_Minus(dbgi, value_node, mode);
2314 case EXPR_UNARY_PLUS:
2315 return expression_to_firm(value);
2316 case EXPR_UNARY_BITWISE_NEGATE: {
2317 ir_node *value_node = expression_to_firm(value);
2318 ir_mode *mode = get_ir_mode_arithmetic(type);
2319 return new_d_Not(dbgi, value_node, mode);
2321 case EXPR_UNARY_NOT: {
2322 ir_node *value_node = _expression_to_firm(value);
2323 value_node = create_conv(dbgi, value_node, mode_b);
2324 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2327 case EXPR_UNARY_DEREFERENCE: {
2328 ir_node *value_node = expression_to_firm(value);
2329 type_t *value_type = skip_typeref(value->base.type);
2330 assert(is_type_pointer(value_type));
2332 /* check for __based */
2333 const variable_t *const base_var = value_type->pointer.base_variable;
2334 if (base_var != NULL) {
2335 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2336 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2337 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2339 type_t *points_to = value_type->pointer.points_to;
2340 return deref_address(dbgi, points_to, value_node);
2342 case EXPR_UNARY_POSTFIX_INCREMENT:
2343 case EXPR_UNARY_POSTFIX_DECREMENT:
2344 case EXPR_UNARY_PREFIX_INCREMENT:
2345 case EXPR_UNARY_PREFIX_DECREMENT:
2346 return create_incdec(expression);
2347 case EXPR_UNARY_CAST: {
2348 ir_node *value_node = expression_to_firm(value);
2349 type_t *from_type = value->base.type;
2350 return create_cast(dbgi, value_node, from_type, type);
2352 case EXPR_UNARY_ASSUME:
2353 return handle_assume(dbgi, value);
2358 panic("invalid UNEXPR type found");
2362 * produces a 0/1 depending of the value of a mode_b node
2364 static ir_node *produce_condition_result(const expression_t *expression,
2365 ir_mode *mode, dbg_info *dbgi)
2367 ir_node *const one_block = new_immBlock();
2368 ir_node *const zero_block = new_immBlock();
2369 create_condition_evaluation(expression, one_block, zero_block);
2370 mature_immBlock(one_block);
2371 mature_immBlock(zero_block);
2373 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2374 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2375 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2376 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2377 set_cur_block(block);
2379 ir_node *const one = new_Const(get_mode_one(mode));
2380 ir_node *const zero = new_Const(get_mode_null(mode));
2381 ir_node *const in[2] = { one, zero };
2382 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2387 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2388 ir_node *value, type_t *type)
2390 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2391 assert(is_type_pointer(type));
2392 pointer_type_t *const pointer_type = &type->pointer;
2393 type_t *const points_to = skip_typeref(pointer_type->points_to);
2394 ir_node * elem_size = get_type_size_node(points_to);
2395 elem_size = create_conv(dbgi, elem_size, mode);
2396 value = create_conv(dbgi, value, mode);
2397 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2401 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2402 ir_node *left, ir_node *right)
2405 type_t *type_left = skip_typeref(expression->left->base.type);
2406 type_t *type_right = skip_typeref(expression->right->base.type);
2408 expression_kind_t kind = expression->base.kind;
2411 case EXPR_BINARY_SHIFTLEFT:
2412 case EXPR_BINARY_SHIFTRIGHT:
2413 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2414 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2415 mode = get_ir_mode_arithmetic(expression->base.type);
2416 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2419 case EXPR_BINARY_SUB:
2420 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2421 const pointer_type_t *const ptr_type = &type_left->pointer;
2423 mode = get_ir_mode_arithmetic(expression->base.type);
2424 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2425 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2426 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2427 ir_node *const no_mem = new_NoMem();
2428 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2429 mode, op_pin_state_floats);
2430 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2433 case EXPR_BINARY_SUB_ASSIGN:
2434 if (is_type_pointer(type_left)) {
2435 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2436 mode = get_ir_mode_arithmetic(type_left);
2441 case EXPR_BINARY_ADD:
2442 case EXPR_BINARY_ADD_ASSIGN:
2443 if (is_type_pointer(type_left)) {
2444 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2445 mode = get_ir_mode_arithmetic(type_left);
2447 } else if (is_type_pointer(type_right)) {
2448 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2449 mode = get_ir_mode_arithmetic(type_right);
2456 mode = get_ir_mode_arithmetic(type_right);
2457 left = create_conv(dbgi, left, mode);
2462 case EXPR_BINARY_ADD_ASSIGN:
2463 case EXPR_BINARY_ADD:
2464 return new_d_Add(dbgi, left, right, mode);
2465 case EXPR_BINARY_SUB_ASSIGN:
2466 case EXPR_BINARY_SUB:
2467 return new_d_Sub(dbgi, left, right, mode);
2468 case EXPR_BINARY_MUL_ASSIGN:
2469 case EXPR_BINARY_MUL:
2470 return new_d_Mul(dbgi, left, right, mode);
2471 case EXPR_BINARY_BITWISE_AND:
2472 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2473 return new_d_And(dbgi, left, right, mode);
2474 case EXPR_BINARY_BITWISE_OR:
2475 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2476 return new_d_Or(dbgi, left, right, mode);
2477 case EXPR_BINARY_BITWISE_XOR:
2478 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2479 return new_d_Eor(dbgi, left, right, mode);
2480 case EXPR_BINARY_SHIFTLEFT:
2481 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2482 return new_d_Shl(dbgi, left, right, mode);
2483 case EXPR_BINARY_SHIFTRIGHT:
2484 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2485 if (mode_is_signed(mode)) {
2486 return new_d_Shrs(dbgi, left, right, mode);
2488 return new_d_Shr(dbgi, left, right, mode);
2490 case EXPR_BINARY_DIV:
2491 case EXPR_BINARY_DIV_ASSIGN: {
2492 ir_node *pin = new_Pin(new_NoMem());
2493 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2494 op_pin_state_floats);
2495 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2498 case EXPR_BINARY_MOD:
2499 case EXPR_BINARY_MOD_ASSIGN: {
2500 ir_node *pin = new_Pin(new_NoMem());
2501 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2502 op_pin_state_floats);
2503 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2507 panic("unexpected expression kind");
2511 static ir_node *create_lazy_op(const binary_expression_t *expression)
2513 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2514 type_t *type = skip_typeref(expression->base.type);
2515 ir_mode *mode = get_ir_mode_arithmetic(type);
2517 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2518 bool val = fold_constant_to_bool(expression->left);
2519 expression_kind_t ekind = expression->base.kind;
2520 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2521 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2523 return new_Const(get_mode_null(mode));
2527 return new_Const(get_mode_one(mode));
2531 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2532 bool valr = fold_constant_to_bool(expression->right);
2533 return create_Const_from_bool(mode, valr);
2536 return produce_condition_result(expression->right, mode, dbgi);
2539 return produce_condition_result((const expression_t*) expression, mode,
2543 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2544 ir_node *right, ir_mode *mode);
2546 static ir_node *create_assign_binop(const binary_expression_t *expression)
2548 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2549 const expression_t *left_expr = expression->left;
2550 type_t *type = skip_typeref(left_expr->base.type);
2551 ir_node *right = expression_to_firm(expression->right);
2552 ir_node *left_addr = expression_to_addr(left_expr);
2553 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2554 ir_node *result = create_op(dbgi, expression, left, right);
2556 result = create_cast(dbgi, result, expression->right->base.type, type);
2557 result = do_strict_conv(dbgi, result);
2559 result = set_value_for_expression_addr(left_expr, result, left_addr);
2561 if (!is_type_compound(type)) {
2562 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2563 result = create_conv(dbgi, result, mode_arithmetic);
2568 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2570 expression_kind_t kind = expression->base.kind;
2573 case EXPR_BINARY_EQUAL:
2574 case EXPR_BINARY_NOTEQUAL:
2575 case EXPR_BINARY_LESS:
2576 case EXPR_BINARY_LESSEQUAL:
2577 case EXPR_BINARY_GREATER:
2578 case EXPR_BINARY_GREATEREQUAL:
2579 case EXPR_BINARY_ISGREATER:
2580 case EXPR_BINARY_ISGREATEREQUAL:
2581 case EXPR_BINARY_ISLESS:
2582 case EXPR_BINARY_ISLESSEQUAL:
2583 case EXPR_BINARY_ISLESSGREATER:
2584 case EXPR_BINARY_ISUNORDERED: {
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 ir_relation relation = get_relation(kind);
2589 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2592 case EXPR_BINARY_ASSIGN: {
2593 ir_node *addr = expression_to_addr(expression->left);
2594 ir_node *right = expression_to_firm(expression->right);
2596 = set_value_for_expression_addr(expression->left, right, addr);
2598 type_t *type = skip_typeref(expression->base.type);
2599 if (!is_type_compound(type)) {
2600 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2601 res = create_conv(NULL, res, mode_arithmetic);
2605 case EXPR_BINARY_ADD:
2606 case EXPR_BINARY_SUB:
2607 case EXPR_BINARY_MUL:
2608 case EXPR_BINARY_DIV:
2609 case EXPR_BINARY_MOD:
2610 case EXPR_BINARY_BITWISE_AND:
2611 case EXPR_BINARY_BITWISE_OR:
2612 case EXPR_BINARY_BITWISE_XOR:
2613 case EXPR_BINARY_SHIFTLEFT:
2614 case EXPR_BINARY_SHIFTRIGHT:
2616 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617 ir_node *left = expression_to_firm(expression->left);
2618 ir_node *right = expression_to_firm(expression->right);
2619 return create_op(dbgi, expression, left, right);
2621 case EXPR_BINARY_LOGICAL_AND:
2622 case EXPR_BINARY_LOGICAL_OR:
2623 return create_lazy_op(expression);
2624 case EXPR_BINARY_COMMA:
2625 /* create side effects of left side */
2626 (void) expression_to_firm(expression->left);
2627 return _expression_to_firm(expression->right);
2629 case EXPR_BINARY_ADD_ASSIGN:
2630 case EXPR_BINARY_SUB_ASSIGN:
2631 case EXPR_BINARY_MUL_ASSIGN:
2632 case EXPR_BINARY_MOD_ASSIGN:
2633 case EXPR_BINARY_DIV_ASSIGN:
2634 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2635 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2636 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2637 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2638 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2639 return create_assign_binop(expression);
2641 panic("invalid binexpr type");
2645 static ir_node *array_access_addr(const array_access_expression_t *expression)
2647 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2648 ir_node *base_addr = expression_to_firm(expression->array_ref);
2649 ir_node *offset = expression_to_firm(expression->index);
2650 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2651 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2652 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2657 static ir_node *array_access_to_firm(
2658 const array_access_expression_t *expression)
2660 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2661 ir_node *addr = array_access_addr(expression);
2662 type_t *type = revert_automatic_type_conversion(
2663 (const expression_t*) expression);
2664 type = skip_typeref(type);
2666 return deref_address(dbgi, type, addr);
2669 static long get_offsetof_offset(const offsetof_expression_t *expression)
2671 type_t *orig_type = expression->type;
2674 designator_t *designator = expression->designator;
2675 for ( ; designator != NULL; designator = designator->next) {
2676 type_t *type = skip_typeref(orig_type);
2677 /* be sure the type is constructed */
2678 (void) get_ir_type(type);
2680 if (designator->symbol != NULL) {
2681 assert(is_type_compound(type));
2682 symbol_t *symbol = designator->symbol;
2684 compound_t *compound = type->compound.compound;
2685 entity_t *iter = compound->members.entities;
2686 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2688 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2689 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2690 offset += get_entity_offset(iter->compound_member.entity);
2692 orig_type = iter->declaration.type;
2694 expression_t *array_index = designator->array_index;
2695 assert(designator->array_index != NULL);
2696 assert(is_type_array(type));
2698 long index = fold_constant_to_int(array_index);
2699 ir_type *arr_type = get_ir_type(type);
2700 ir_type *elem_type = get_array_element_type(arr_type);
2701 long elem_size = get_type_size_bytes(elem_type);
2703 offset += index * elem_size;
2705 orig_type = type->array.element_type;
2712 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2714 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2715 long offset = get_offsetof_offset(expression);
2716 ir_tarval *tv = new_tarval_from_long(offset, mode);
2717 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2719 return new_d_Const(dbgi, tv);
2722 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2723 ir_entity *entity, type_t *type);
2724 static ir_initializer_t *create_ir_initializer(
2725 const initializer_t *initializer, type_t *type);
2727 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2728 initializer_t *initializer,
2731 /* create the ir_initializer */
2732 ir_graph *const old_current_ir_graph = current_ir_graph;
2733 current_ir_graph = get_const_code_irg();
2735 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2737 assert(current_ir_graph == get_const_code_irg());
2738 current_ir_graph = old_current_ir_graph;
2740 ident *const id = id_unique("initializer.%u");
2741 ir_type *const irtype = get_ir_type(type);
2742 ir_type *const global_type = get_glob_type();
2743 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2744 set_entity_ld_ident(entity, id);
2745 set_entity_visibility(entity, ir_visibility_private);
2746 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2747 set_entity_initializer(entity, irinitializer);
2751 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2753 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2754 type_t *type = expression->type;
2755 initializer_t *initializer = expression->initializer;
2757 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2758 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2759 return create_symconst(dbgi, entity);
2761 /* create an entity on the stack */
2762 ident *const id = id_unique("CompLit.%u");
2763 ir_type *const irtype = get_ir_type(type);
2764 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2766 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2767 set_entity_ld_ident(entity, id);
2769 /* create initialisation code */
2770 create_local_initializer(initializer, dbgi, entity, type);
2772 /* create a sel for the compound literal address */
2773 ir_node *frame = get_irg_frame(current_ir_graph);
2774 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2779 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2781 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2782 type_t *const type = expr->type;
2783 ir_node *const addr = compound_literal_addr(expr);
2784 return deref_address(dbgi, type, addr);
2788 * Transform a sizeof expression into Firm code.
2790 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2792 type_t *const type = skip_typeref(expression->type);
2793 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2794 if (is_type_array(type) && type->array.is_vla
2795 && expression->tp_expression != NULL) {
2796 expression_to_firm(expression->tp_expression);
2799 return get_type_size_node(type);
2802 static entity_t *get_expression_entity(const expression_t *expression)
2804 if (expression->kind != EXPR_REFERENCE)
2807 return expression->reference.entity;
2810 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2812 switch(entity->kind) {
2813 case DECLARATION_KIND_CASES:
2814 return entity->declaration.alignment;
2817 return entity->compound.alignment;
2818 case ENTITY_TYPEDEF:
2819 return entity->typedefe.alignment;
2827 * Transform an alignof expression into Firm code.
2829 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2831 unsigned alignment = 0;
2833 const expression_t *tp_expression = expression->tp_expression;
2834 if (tp_expression != NULL) {
2835 entity_t *entity = get_expression_entity(tp_expression);
2836 if (entity != NULL) {
2837 alignment = get_cparser_entity_alignment(entity);
2841 if (alignment == 0) {
2842 type_t *type = expression->type;
2843 alignment = get_type_alignment(type);
2846 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2847 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2848 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2849 return new_d_Const(dbgi, tv);
2852 static void init_ir_types(void);
2854 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2856 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2858 bool constant_folding_old = constant_folding;
2859 constant_folding = true;
2860 int old_optimize = get_optimize();
2861 int old_constant_folding = get_opt_constant_folding();
2863 set_opt_constant_folding(1);
2867 ir_graph *old_current_ir_graph = current_ir_graph;
2868 current_ir_graph = get_const_code_irg();
2870 ir_node *const cnst = _expression_to_firm(expression);
2872 current_ir_graph = old_current_ir_graph;
2873 set_optimize(old_optimize);
2874 set_opt_constant_folding(old_constant_folding);
2876 if (!is_Const(cnst)) {
2877 panic("couldn't fold constant");
2880 constant_folding = constant_folding_old;
2882 ir_tarval *const tv = get_Const_tarval(cnst);
2883 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2884 return tarval_convert_to(tv, mode);
2887 /* this function is only used in parser.c, but it relies on libfirm functionality */
2888 bool constant_is_negative(const expression_t *expression)
2890 ir_tarval *tv = fold_constant_to_tarval(expression);
2891 return tarval_is_negative(tv);
2894 long fold_constant_to_int(const expression_t *expression)
2896 ir_tarval *tv = fold_constant_to_tarval(expression);
2897 if (!tarval_is_long(tv)) {
2898 panic("result of constant folding is not integer");
2901 return get_tarval_long(tv);
2904 bool fold_constant_to_bool(const expression_t *expression)
2906 ir_tarval *tv = fold_constant_to_tarval(expression);
2907 return !tarval_is_null(tv);
2910 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2912 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2914 /* first try to fold a constant condition */
2915 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2916 bool val = fold_constant_to_bool(expression->condition);
2918 expression_t *true_expression = expression->true_expression;
2919 if (true_expression == NULL)
2920 true_expression = expression->condition;
2921 return expression_to_firm(true_expression);
2923 return expression_to_firm(expression->false_expression);
2927 ir_node *const true_block = new_immBlock();
2928 ir_node *const false_block = new_immBlock();
2929 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2930 mature_immBlock(true_block);
2931 mature_immBlock(false_block);
2933 set_cur_block(true_block);
2935 if (expression->true_expression != NULL) {
2936 true_val = expression_to_firm(expression->true_expression);
2937 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2938 true_val = cond_expr;
2940 /* Condition ended with a short circuit (&&, ||, !) operation or a
2941 * comparison. Generate a "1" as value for the true branch. */
2942 true_val = new_Const(get_mode_one(mode_Is));
2944 ir_node *const true_jmp = new_d_Jmp(dbgi);
2946 set_cur_block(false_block);
2947 ir_node *const false_val = expression_to_firm(expression->false_expression);
2948 ir_node *const false_jmp = new_d_Jmp(dbgi);
2950 /* create the common block */
2951 ir_node *const in_cf[2] = { true_jmp, false_jmp };
2952 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2953 set_cur_block(block);
2955 /* TODO improve static semantics, so either both or no values are NULL */
2956 if (true_val == NULL || false_val == NULL)
2959 ir_node *const in[2] = { true_val, false_val };
2960 type_t *const type = skip_typeref(expression->base.type);
2961 ir_mode *const mode = get_ir_mode_arithmetic(type);
2962 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2968 * Returns an IR-node representing the address of a field.
2970 static ir_node *select_addr(const select_expression_t *expression)
2972 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2974 construct_select_compound(expression);
2976 ir_node *compound_addr = expression_to_firm(expression->compound);
2978 entity_t *entry = expression->compound_entry;
2979 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2980 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2982 if (constant_folding) {
2983 ir_mode *mode = get_irn_mode(compound_addr);
2984 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2985 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2986 return new_d_Add(dbgi, compound_addr, ofs, mode);
2988 ir_entity *irentity = entry->compound_member.entity;
2989 assert(irentity != NULL);
2990 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2994 static ir_node *select_to_firm(const select_expression_t *expression)
2996 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2997 ir_node *addr = select_addr(expression);
2998 type_t *type = revert_automatic_type_conversion(
2999 (const expression_t*) expression);
3000 type = skip_typeref(type);
3002 entity_t *entry = expression->compound_entry;
3003 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3005 if (entry->compound_member.bitfield) {
3006 return bitfield_extract_to_firm(expression, addr);
3009 return deref_address(dbgi, type, addr);
3012 /* Values returned by __builtin_classify_type. */
3013 typedef enum gcc_type_class
3019 enumeral_type_class,
3022 reference_type_class,
3026 function_type_class,
3037 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3039 type_t *type = expr->type_expression->base.type;
3041 /* FIXME gcc returns different values depending on whether compiling C or C++
3042 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3045 type = skip_typeref(type);
3046 switch (type->kind) {
3048 const atomic_type_t *const atomic_type = &type->atomic;
3049 switch (atomic_type->akind) {
3050 /* gcc cannot do that */
3051 case ATOMIC_TYPE_VOID:
3052 tc = void_type_class;
3055 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3056 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3057 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3058 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3059 case ATOMIC_TYPE_SHORT:
3060 case ATOMIC_TYPE_USHORT:
3061 case ATOMIC_TYPE_INT:
3062 case ATOMIC_TYPE_UINT:
3063 case ATOMIC_TYPE_LONG:
3064 case ATOMIC_TYPE_ULONG:
3065 case ATOMIC_TYPE_LONGLONG:
3066 case ATOMIC_TYPE_ULONGLONG:
3067 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3068 tc = integer_type_class;
3071 case ATOMIC_TYPE_FLOAT:
3072 case ATOMIC_TYPE_DOUBLE:
3073 case ATOMIC_TYPE_LONG_DOUBLE:
3074 tc = real_type_class;
3077 panic("Unexpected atomic type in classify_type_to_firm().");
3080 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3081 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3082 case TYPE_ARRAY: /* gcc handles this as pointer */
3083 case TYPE_FUNCTION: /* gcc handles this as pointer */
3084 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3085 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3086 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3088 /* gcc handles this as integer */
3089 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3091 /* gcc classifies the referenced type */
3092 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3094 /* typedef/typeof should be skipped already */
3100 panic("unexpected TYPE classify_type_to_firm().");
3104 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3105 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3106 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3107 return new_d_Const(dbgi, tv);
3110 static ir_node *function_name_to_firm(
3111 const funcname_expression_t *const expr)
3113 switch(expr->kind) {
3114 case FUNCNAME_FUNCTION:
3115 case FUNCNAME_PRETTY_FUNCTION:
3116 case FUNCNAME_FUNCDNAME:
3117 if (current_function_name == NULL) {
3118 source_position_t const *const src_pos = &expr->base.source_position;
3119 char const *const name = current_function_entity->base.symbol->string;
3120 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3121 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3123 return current_function_name;
3124 case FUNCNAME_FUNCSIG:
3125 if (current_funcsig == NULL) {
3126 source_position_t const *const src_pos = &expr->base.source_position;
3127 ir_entity *const ent = get_irg_entity(current_ir_graph);
3128 char const *const name = get_entity_ld_name(ent);
3129 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3130 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3132 return current_funcsig;
3134 panic("Unsupported function name");
3137 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3139 statement_t *statement = expr->statement;
3141 assert(statement->kind == STATEMENT_COMPOUND);
3142 return compound_statement_to_firm(&statement->compound);
3145 static ir_node *va_start_expression_to_firm(
3146 const va_start_expression_t *const expr)
3148 ir_entity *param_ent = current_vararg_entity;
3149 if (param_ent == NULL) {
3150 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3151 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3152 ir_type *const param_type = get_unknown_type();
3153 param_ent = new_parameter_entity(frame_type, n, param_type);
3154 current_vararg_entity = param_ent;
3157 ir_node *const frame = get_irg_frame(current_ir_graph);
3158 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3159 ir_node *const no_mem = new_NoMem();
3160 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3162 set_value_for_expression(expr->ap, arg_sel);
3167 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3169 type_t *const type = expr->base.type;
3170 expression_t *const ap_expr = expr->ap;
3171 ir_node *const ap_addr = expression_to_addr(ap_expr);
3172 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3173 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3174 ir_node *const res = deref_address(dbgi, type, ap);
3176 ir_node *const cnst = get_type_size_node(expr->base.type);
3177 ir_mode *const mode = get_irn_mode(cnst);
3178 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3179 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3180 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3181 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3182 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3184 set_value_for_expression_addr(ap_expr, add, ap_addr);
3190 * Generate Firm for a va_copy expression.
3192 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3194 ir_node *const src = expression_to_firm(expr->src);
3195 set_value_for_expression(expr->dst, src);
3199 static ir_node *dereference_addr(const unary_expression_t *const expression)
3201 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3202 return expression_to_firm(expression->value);
3206 * Returns a IR-node representing an lvalue of the given expression.
3208 static ir_node *expression_to_addr(const expression_t *expression)
3210 switch(expression->kind) {
3211 case EXPR_ARRAY_ACCESS:
3212 return array_access_addr(&expression->array_access);
3214 return call_expression_to_firm(&expression->call);
3215 case EXPR_COMPOUND_LITERAL:
3216 return compound_literal_addr(&expression->compound_literal);
3217 case EXPR_REFERENCE:
3218 return reference_addr(&expression->reference);
3220 return select_addr(&expression->select);
3221 case EXPR_UNARY_DEREFERENCE:
3222 return dereference_addr(&expression->unary);
3226 panic("trying to get address of non-lvalue");
3229 static ir_node *builtin_constant_to_firm(
3230 const builtin_constant_expression_t *expression)
3232 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3233 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3234 return create_Const_from_bool(mode, v);
3237 static ir_node *builtin_types_compatible_to_firm(
3238 const builtin_types_compatible_expression_t *expression)
3240 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3241 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3242 bool const value = types_compatible(left, right);
3243 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3244 return create_Const_from_bool(mode, value);
3247 static ir_node *get_label_block(label_t *label)
3249 if (label->block != NULL)
3250 return label->block;
3252 /* beware: might be called from create initializer with current_ir_graph
3253 * set to const_code_irg. */
3254 ir_graph *rem = current_ir_graph;
3255 current_ir_graph = current_function;
3257 ir_node *block = new_immBlock();
3259 label->block = block;
3261 ARR_APP1(label_t *, all_labels, label);
3263 current_ir_graph = rem;
3268 * Pointer to a label. This is used for the
3269 * GNU address-of-label extension.
3271 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3273 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3274 ir_node *block = get_label_block(label->label);
3275 ir_entity *entity = create_Block_entity(block);
3277 symconst_symbol value;
3278 value.entity_p = entity;
3279 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3283 * creates firm nodes for an expression. The difference between this function
3284 * and expression_to_firm is, that this version might produce mode_b nodes
3285 * instead of mode_Is.
3287 static ir_node *_expression_to_firm(expression_t const *const expr)
3290 if (!constant_folding) {
3291 assert(!expr->base.transformed);
3292 ((expression_t*)expr)->base.transformed = true;
3296 switch (expr->kind) {
3297 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3298 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3299 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3300 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3301 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3302 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3303 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3304 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3305 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3306 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3307 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3308 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3309 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3310 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3311 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3312 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3313 case EXPR_SELECT: return select_to_firm( &expr->select);
3314 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3315 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3316 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3317 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3318 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3319 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3321 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3323 case EXPR_ERROR: break;
3325 panic("invalid expression found");
3329 * Check if a given expression is a GNU __builtin_expect() call.
3331 static bool is_builtin_expect(const expression_t *expression)
3333 if (expression->kind != EXPR_CALL)
3336 expression_t *function = expression->call.function;
3337 if (function->kind != EXPR_REFERENCE)
3339 reference_expression_t *ref = &function->reference;
3340 if (ref->entity->kind != ENTITY_FUNCTION ||
3341 ref->entity->function.btk != BUILTIN_EXPECT)
3347 static bool produces_mode_b(const expression_t *expression)
3349 switch (expression->kind) {
3350 case EXPR_BINARY_EQUAL:
3351 case EXPR_BINARY_NOTEQUAL:
3352 case EXPR_BINARY_LESS:
3353 case EXPR_BINARY_LESSEQUAL:
3354 case EXPR_BINARY_GREATER:
3355 case EXPR_BINARY_GREATEREQUAL:
3356 case EXPR_BINARY_ISGREATER:
3357 case EXPR_BINARY_ISGREATEREQUAL:
3358 case EXPR_BINARY_ISLESS:
3359 case EXPR_BINARY_ISLESSEQUAL:
3360 case EXPR_BINARY_ISLESSGREATER:
3361 case EXPR_BINARY_ISUNORDERED:
3362 case EXPR_UNARY_NOT:
3366 if (is_builtin_expect(expression)) {
3367 expression_t *argument = expression->call.arguments->expression;
3368 return produces_mode_b(argument);
3371 case EXPR_BINARY_COMMA:
3372 return produces_mode_b(expression->binary.right);
3379 static ir_node *expression_to_firm(const expression_t *expression)
3381 if (!produces_mode_b(expression)) {
3382 ir_node *res = _expression_to_firm(expression);
3383 assert(res == NULL || get_irn_mode(res) != mode_b);
3387 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3388 return new_Const(fold_constant_to_tarval(expression));
3391 /* we have to produce a 0/1 from the mode_b expression */
3392 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3393 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3394 return produce_condition_result(expression, mode, dbgi);
3398 * create a short-circuit expression evaluation that tries to construct
3399 * efficient control flow structures for &&, || and ! expressions
3401 static ir_node *create_condition_evaluation(const expression_t *expression,
3402 ir_node *true_block,
3403 ir_node *false_block)
3405 switch(expression->kind) {
3406 case EXPR_UNARY_NOT: {
3407 const unary_expression_t *unary_expression = &expression->unary;
3408 create_condition_evaluation(unary_expression->value, false_block,
3412 case EXPR_BINARY_LOGICAL_AND: {
3413 const binary_expression_t *binary_expression = &expression->binary;
3415 ir_node *extra_block = new_immBlock();
3416 create_condition_evaluation(binary_expression->left, extra_block,
3418 mature_immBlock(extra_block);
3419 set_cur_block(extra_block);
3420 create_condition_evaluation(binary_expression->right, true_block,
3424 case EXPR_BINARY_LOGICAL_OR: {
3425 const binary_expression_t *binary_expression = &expression->binary;
3427 ir_node *extra_block = new_immBlock();
3428 create_condition_evaluation(binary_expression->left, true_block,
3430 mature_immBlock(extra_block);
3431 set_cur_block(extra_block);
3432 create_condition_evaluation(binary_expression->right, true_block,
3440 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3441 ir_node *cond_expr = _expression_to_firm(expression);
3442 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3443 ir_node *cond = new_d_Cond(dbgi, condition);
3444 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3445 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3447 /* set branch prediction info based on __builtin_expect */
3448 if (is_builtin_expect(expression) && is_Cond(cond)) {
3449 call_argument_t *argument = expression->call.arguments->next;
3450 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3451 bool const cnst = fold_constant_to_bool(argument->expression);
3452 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3453 set_Cond_jmp_pred(cond, pred);
3457 add_immBlock_pred(true_block, true_proj);
3458 add_immBlock_pred(false_block, false_proj);
3460 set_unreachable_now();
3464 static void create_variable_entity(entity_t *variable,
3465 declaration_kind_t declaration_kind,
3466 ir_type *parent_type)
3468 assert(variable->kind == ENTITY_VARIABLE);
3469 type_t *type = skip_typeref(variable->declaration.type);
3471 ident *const id = new_id_from_str(variable->base.symbol->string);
3472 ir_type *const irtype = get_ir_type(type);
3473 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3474 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3475 unsigned alignment = variable->declaration.alignment;
3477 set_entity_alignment(irentity, alignment);
3479 handle_decl_modifiers(irentity, variable);
3481 variable->declaration.kind = (unsigned char) declaration_kind;
3482 variable->variable.v.entity = irentity;
3483 set_entity_ld_ident(irentity, create_ld_ident(variable));
3485 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3486 set_entity_volatility(irentity, volatility_is_volatile);
3491 typedef struct type_path_entry_t type_path_entry_t;
3492 struct type_path_entry_t {
3494 ir_initializer_t *initializer;
3496 entity_t *compound_entry;
3499 typedef struct type_path_t type_path_t;
3500 struct type_path_t {
3501 type_path_entry_t *path;
3506 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3508 size_t len = ARR_LEN(path->path);
3510 for (size_t i = 0; i < len; ++i) {
3511 const type_path_entry_t *entry = & path->path[i];
3513 type_t *type = skip_typeref(entry->type);
3514 if (is_type_compound(type)) {
3515 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3516 } else if (is_type_array(type)) {
3517 fprintf(stderr, "[%u]", (unsigned) entry->index);
3519 fprintf(stderr, "-INVALID-");
3522 fprintf(stderr, " (");
3523 print_type(path->top_type);
3524 fprintf(stderr, ")");
3527 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3529 size_t len = ARR_LEN(path->path);
3531 return & path->path[len-1];
3534 static type_path_entry_t *append_to_type_path(type_path_t *path)
3536 size_t len = ARR_LEN(path->path);
3537 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3539 type_path_entry_t *result = & path->path[len];
3540 memset(result, 0, sizeof(result[0]));
3544 static size_t get_compound_member_count(const compound_type_t *type)
3546 compound_t *compound = type->compound;
3547 size_t n_members = 0;
3548 entity_t *member = compound->members.entities;
3549 for ( ; member != NULL; member = member->base.next) {
3556 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3558 type_t *orig_top_type = path->top_type;
3559 type_t *top_type = skip_typeref(orig_top_type);
3561 assert(is_type_compound(top_type) || is_type_array(top_type));
3563 if (ARR_LEN(path->path) == 0) {
3566 type_path_entry_t *top = get_type_path_top(path);
3567 ir_initializer_t *initializer = top->initializer;
3568 return get_initializer_compound_value(initializer, top->index);
3572 static void descend_into_subtype(type_path_t *path)
3574 type_t *orig_top_type = path->top_type;
3575 type_t *top_type = skip_typeref(orig_top_type);
3577 assert(is_type_compound(top_type) || is_type_array(top_type));
3579 ir_initializer_t *initializer = get_initializer_entry(path);
3581 type_path_entry_t *top = append_to_type_path(path);
3582 top->type = top_type;
3586 if (is_type_compound(top_type)) {
3587 compound_t *const compound = top_type->compound.compound;
3588 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3590 top->compound_entry = entry;
3592 len = get_compound_member_count(&top_type->compound);
3593 if (entry != NULL) {
3594 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3595 path->top_type = entry->declaration.type;
3598 assert(is_type_array(top_type));
3599 assert(top_type->array.size > 0);
3602 path->top_type = top_type->array.element_type;
3603 len = top_type->array.size;
3605 if (initializer == NULL
3606 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3607 initializer = create_initializer_compound(len);
3608 /* we have to set the entry at the 2nd latest path entry... */
3609 size_t path_len = ARR_LEN(path->path);
3610 assert(path_len >= 1);
3612 type_path_entry_t *entry = & path->path[path_len-2];
3613 ir_initializer_t *tinitializer = entry->initializer;
3614 set_initializer_compound_value(tinitializer, entry->index,
3618 top->initializer = initializer;
3621 static void ascend_from_subtype(type_path_t *path)
3623 type_path_entry_t *top = get_type_path_top(path);
3625 path->top_type = top->type;
3627 size_t len = ARR_LEN(path->path);
3628 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3631 static void walk_designator(type_path_t *path, const designator_t *designator)
3633 /* designators start at current object type */
3634 ARR_RESIZE(type_path_entry_t, path->path, 1);
3636 for ( ; designator != NULL; designator = designator->next) {
3637 type_path_entry_t *top = get_type_path_top(path);
3638 type_t *orig_type = top->type;
3639 type_t *type = skip_typeref(orig_type);
3641 if (designator->symbol != NULL) {
3642 assert(is_type_compound(type));
3644 symbol_t *symbol = designator->symbol;
3646 compound_t *compound = type->compound.compound;
3647 entity_t *iter = compound->members.entities;
3648 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3649 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3651 /* revert previous initialisations of other union elements */
3652 if (type->kind == TYPE_COMPOUND_UNION) {
3653 ir_initializer_t *initializer = top->initializer;
3654 if (initializer != NULL
3655 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3656 /* are we writing to a new element? */
3657 ir_initializer_t *oldi
3658 = get_initializer_compound_value(initializer, index);
3659 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3660 /* clear initializer */
3662 = get_initializer_compound_n_entries(initializer);
3663 ir_initializer_t *nulli = get_initializer_null();
3664 for (size_t i = 0; i < len; ++i) {
3665 set_initializer_compound_value(initializer, i,
3672 top->type = orig_type;
3673 top->compound_entry = iter;
3675 orig_type = iter->declaration.type;
3677 expression_t *array_index = designator->array_index;
3678 assert(is_type_array(type));
3680 long index = fold_constant_to_int(array_index);
3681 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3683 top->type = orig_type;
3684 top->index = (size_t) index;
3685 orig_type = type->array.element_type;
3687 path->top_type = orig_type;
3689 if (designator->next != NULL) {
3690 descend_into_subtype(path);
3694 path->invalid = false;
3697 static void advance_current_object(type_path_t *path)
3699 if (path->invalid) {
3700 /* TODO: handle this... */
3701 panic("invalid initializer in ast2firm (excessive elements)");
3704 type_path_entry_t *top = get_type_path_top(path);
3706 type_t *type = skip_typeref(top->type);
3707 if (is_type_union(type)) {
3708 /* only the first element is initialized in unions */
3709 top->compound_entry = NULL;
3710 } else if (is_type_struct(type)) {
3711 entity_t *entry = top->compound_entry;
3714 entry = skip_unnamed_bitfields(entry->base.next);
3715 top->compound_entry = entry;
3716 if (entry != NULL) {
3717 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3718 path->top_type = entry->declaration.type;
3722 assert(is_type_array(type));
3725 if (!type->array.size_constant || top->index < type->array.size) {
3730 /* we're past the last member of the current sub-aggregate, try if we
3731 * can ascend in the type hierarchy and continue with another subobject */
3732 size_t len = ARR_LEN(path->path);
3735 ascend_from_subtype(path);
3736 advance_current_object(path);
3738 path->invalid = true;
3743 static ir_initializer_t *create_ir_initializer_value(
3744 const initializer_value_t *initializer)
3746 if (is_type_compound(initializer->value->base.type)) {
3747 panic("initializer creation for compounds not implemented yet");
3749 type_t *type = initializer->value->base.type;
3750 expression_t *expr = initializer->value;
3751 ir_node *value = expression_to_firm(expr);
3752 ir_mode *mode = get_ir_mode_storage(type);
3753 value = create_conv(NULL, value, mode);
3754 return create_initializer_const(value);
3757 /** test wether type can be initialized by a string constant */
3758 static bool is_string_type(type_t *type)
3760 if (!is_type_array(type))
3763 type_t *const inner = skip_typeref(type->array.element_type);
3764 return is_type_integer(inner);
3767 static ir_initializer_t *create_ir_initializer_list(
3768 const initializer_list_t *initializer, type_t *type)
3771 memset(&path, 0, sizeof(path));
3772 path.top_type = type;
3773 path.path = NEW_ARR_F(type_path_entry_t, 0);
3775 descend_into_subtype(&path);
3777 for (size_t i = 0; i < initializer->len; ++i) {
3778 const initializer_t *sub_initializer = initializer->initializers[i];
3780 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3781 walk_designator(&path, sub_initializer->designator.designator);
3785 if (sub_initializer->kind == INITIALIZER_VALUE) {
3786 /* we might have to descend into types until we're at a scalar
3789 type_t *orig_top_type = path.top_type;
3790 type_t *top_type = skip_typeref(orig_top_type);
3792 if (is_type_scalar(top_type))
3794 descend_into_subtype(&path);
3796 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3797 /* we might have to descend into types until we're at a scalar
3800 type_t *orig_top_type = path.top_type;
3801 type_t *top_type = skip_typeref(orig_top_type);
3803 if (is_string_type(top_type))
3805 descend_into_subtype(&path);
3809 ir_initializer_t *sub_irinitializer
3810 = create_ir_initializer(sub_initializer, path.top_type);
3812 size_t path_len = ARR_LEN(path.path);
3813 assert(path_len >= 1);
3814 type_path_entry_t *entry = & path.path[path_len-1];
3815 ir_initializer_t *tinitializer = entry->initializer;
3816 set_initializer_compound_value(tinitializer, entry->index,
3819 advance_current_object(&path);
3822 assert(ARR_LEN(path.path) >= 1);
3823 ir_initializer_t *result = path.path[0].initializer;
3824 DEL_ARR_F(path.path);
3829 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3831 type = skip_typeref(type);
3833 assert(type->kind == TYPE_ARRAY);
3834 assert(type->array.size_constant);
3835 string_literal_expression_t const *const str = get_init_string(init);
3836 size_t const str_len = str->value.size;
3837 size_t const arr_len = type->array.size;
3838 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3839 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3840 char const * p = str->value.begin;
3841 switch (str->value.encoding) {
3842 case STRING_ENCODING_CHAR:
3843 for (size_t i = 0; i != arr_len; ++i) {
3844 char const c = i < str_len ? *p++ : 0;
3845 ir_tarval *const tv = new_tarval_from_long(c, mode);
3846 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3847 set_initializer_compound_value(irinit, i, tvinit);
3851 case STRING_ENCODING_WIDE:
3852 for (size_t i = 0; i != arr_len; ++i) {
3853 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3854 ir_tarval *const tv = new_tarval_from_long(c, mode);
3855 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3856 set_initializer_compound_value(irinit, i, tvinit);
3864 static ir_initializer_t *create_ir_initializer(
3865 const initializer_t *initializer, type_t *type)
3867 switch(initializer->kind) {
3868 case INITIALIZER_STRING:
3869 return create_ir_initializer_string(initializer, type);
3871 case INITIALIZER_LIST:
3872 return create_ir_initializer_list(&initializer->list, type);
3874 case INITIALIZER_VALUE:
3875 return create_ir_initializer_value(&initializer->value);
3877 case INITIALIZER_DESIGNATOR:
3878 panic("unexpected designator initializer found");
3880 panic("unknown initializer");
3883 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3884 * are elements [...] the remainder of the aggregate shall be initialized
3885 * implicitly the same as objects that have static storage duration. */
3886 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3889 /* for unions we must NOT do anything for null initializers */
3890 ir_type *owner = get_entity_owner(entity);
3891 if (is_Union_type(owner)) {
3895 ir_type *ent_type = get_entity_type(entity);
3896 /* create sub-initializers for a compound type */
3897 if (is_compound_type(ent_type)) {
3898 unsigned n_members = get_compound_n_members(ent_type);
3899 for (unsigned n = 0; n < n_members; ++n) {
3900 ir_entity *member = get_compound_member(ent_type, n);
3901 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3903 create_dynamic_null_initializer(member, dbgi, addr);
3907 if (is_Array_type(ent_type)) {
3908 assert(has_array_upper_bound(ent_type, 0));
3909 long n = get_array_upper_bound_int(ent_type, 0);
3910 for (long i = 0; i < n; ++i) {
3911 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3912 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3913 ir_node *cnst = new_d_Const(dbgi, index_tv);
3914 ir_node *in[1] = { cnst };
3915 ir_entity *arrent = get_array_element_entity(ent_type);
3916 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3918 create_dynamic_null_initializer(arrent, dbgi, addr);
3923 ir_mode *value_mode = get_type_mode(ent_type);
3924 ir_node *node = new_Const(get_mode_null(value_mode));
3926 /* is it a bitfield type? */
3927 if (is_Primitive_type(ent_type) &&
3928 get_primitive_base_type(ent_type) != NULL) {
3929 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3933 ir_node *mem = get_store();
3934 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3935 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3939 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3940 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3942 switch(get_initializer_kind(initializer)) {
3943 case IR_INITIALIZER_NULL:
3944 create_dynamic_null_initializer(entity, dbgi, base_addr);
3946 case IR_INITIALIZER_CONST: {
3947 ir_node *node = get_initializer_const_value(initializer);
3948 ir_type *ent_type = get_entity_type(entity);
3950 /* is it a bitfield type? */
3951 if (is_Primitive_type(ent_type) &&
3952 get_primitive_base_type(ent_type) != NULL) {
3953 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3957 assert(get_type_mode(type) == get_irn_mode(node));
3958 ir_node *mem = get_store();
3959 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3960 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3964 case IR_INITIALIZER_TARVAL: {
3965 ir_tarval *tv = get_initializer_tarval_value(initializer);
3966 ir_node *cnst = new_d_Const(dbgi, tv);
3967 ir_type *ent_type = get_entity_type(entity);
3969 /* is it a bitfield type? */
3970 if (is_Primitive_type(ent_type) &&
3971 get_primitive_base_type(ent_type) != NULL) {
3972 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3976 assert(get_type_mode(type) == get_tarval_mode(tv));
3977 ir_node *mem = get_store();
3978 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3979 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3983 case IR_INITIALIZER_COMPOUND: {
3984 assert(is_compound_type(type) || is_Array_type(type));
3986 if (is_Array_type(type)) {
3987 assert(has_array_upper_bound(type, 0));
3988 n_members = get_array_upper_bound_int(type, 0);
3990 n_members = get_compound_n_members(type);
3993 if (get_initializer_compound_n_entries(initializer)
3994 != (unsigned) n_members)
3995 panic("initializer doesn't match compound type");
3997 for (int i = 0; i < n_members; ++i) {
4000 ir_entity *sub_entity;
4001 if (is_Array_type(type)) {
4002 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4003 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4004 ir_node *cnst = new_d_Const(dbgi, index_tv);
4005 ir_node *in[1] = { cnst };
4006 irtype = get_array_element_type(type);
4007 sub_entity = get_array_element_entity(type);
4008 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4011 sub_entity = get_compound_member(type, i);
4012 irtype = get_entity_type(sub_entity);
4013 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4017 ir_initializer_t *sub_init
4018 = get_initializer_compound_value(initializer, i);
4020 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4027 panic("invalid IR_INITIALIZER found");
4030 static void create_dynamic_initializer(ir_initializer_t *initializer,
4031 dbg_info *dbgi, ir_entity *entity)
4033 ir_node *frame = get_irg_frame(current_ir_graph);
4034 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4035 ir_type *type = get_entity_type(entity);
4037 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4040 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4041 ir_entity *entity, type_t *type)
4043 ir_node *memory = get_store();
4044 ir_node *nomem = new_NoMem();
4045 ir_node *frame = get_irg_frame(current_ir_graph);
4046 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4048 if (initializer->kind == INITIALIZER_VALUE) {
4049 initializer_value_t *initializer_value = &initializer->value;
4051 ir_node *value = expression_to_firm(initializer_value->value);
4052 type = skip_typeref(type);
4053 assign_value(dbgi, addr, type, value);
4057 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4058 ir_initializer_t *irinitializer
4059 = create_ir_initializer(initializer, type);
4061 create_dynamic_initializer(irinitializer, dbgi, entity);
4065 /* create a "template" entity which is copied to the entity on the stack */
4066 ir_entity *const init_entity
4067 = create_initializer_entity(dbgi, initializer, type);
4068 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4069 ir_type *const irtype = get_ir_type(type);
4070 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4072 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4073 set_store(copyb_mem);
4076 static void create_initializer_local_variable_entity(entity_t *entity)
4078 assert(entity->kind == ENTITY_VARIABLE);
4079 initializer_t *initializer = entity->variable.initializer;
4080 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4081 ir_entity *irentity = entity->variable.v.entity;
4082 type_t *type = entity->declaration.type;
4084 create_local_initializer(initializer, dbgi, irentity, type);
4087 static void create_variable_initializer(entity_t *entity)
4089 assert(entity->kind == ENTITY_VARIABLE);
4090 initializer_t *initializer = entity->variable.initializer;
4091 if (initializer == NULL)
4094 declaration_kind_t declaration_kind
4095 = (declaration_kind_t) entity->declaration.kind;
4096 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4097 create_initializer_local_variable_entity(entity);
4101 type_t *type = entity->declaration.type;
4102 type_qualifiers_t tq = get_type_qualifier(type, true);
4104 if (initializer->kind == INITIALIZER_VALUE) {
4105 expression_t * value = initializer->value.value;
4106 type_t *const init_type = skip_typeref(value->base.type);
4108 if (!is_type_scalar(init_type)) {
4110 while (value->kind == EXPR_UNARY_CAST)
4111 value = value->unary.value;
4113 if (value->kind != EXPR_COMPOUND_LITERAL)
4114 panic("expected non-scalar initializer to be a compound literal");
4115 initializer = value->compound_literal.initializer;
4116 goto have_initializer;
4119 ir_node * node = expression_to_firm(value);
4120 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4121 ir_mode *const mode = get_ir_mode_storage(init_type);
4122 node = create_conv(dbgi, node, mode);
4123 node = do_strict_conv(dbgi, node);
4125 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4126 set_value(entity->variable.v.value_number, node);
4128 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4130 ir_entity *irentity = entity->variable.v.entity;
4132 if (tq & TYPE_QUALIFIER_CONST
4133 && get_entity_owner(irentity) != get_tls_type()) {
4134 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4136 set_atomic_ent_value(irentity, node);
4140 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4141 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4143 ir_entity *irentity = entity->variable.v.entity;
4144 ir_initializer_t *irinitializer
4145 = create_ir_initializer(initializer, type);
4147 if (tq & TYPE_QUALIFIER_CONST) {
4148 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4150 set_entity_initializer(irentity, irinitializer);
4154 static void create_variable_length_array(entity_t *entity)
4156 assert(entity->kind == ENTITY_VARIABLE);
4157 assert(entity->variable.initializer == NULL);
4159 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4160 entity->variable.v.vla_base = NULL;
4162 /* TODO: record VLA somewhere so we create the free node when we leave
4166 static void allocate_variable_length_array(entity_t *entity)
4168 assert(entity->kind == ENTITY_VARIABLE);
4169 assert(entity->variable.initializer == NULL);
4170 assert(currently_reachable());
4172 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4173 type_t *type = entity->declaration.type;
4174 ir_type *el_type = get_ir_type(type->array.element_type);
4176 /* make sure size_node is calculated */
4177 get_type_size_node(type);
4178 ir_node *elems = type->array.size_node;
4179 ir_node *mem = get_store();
4180 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4182 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4183 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4186 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4187 entity->variable.v.vla_base = addr;
4191 * Creates a Firm local variable from a declaration.
4193 static void create_local_variable(entity_t *entity)
4195 assert(entity->kind == ENTITY_VARIABLE);
4196 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4198 bool needs_entity = entity->variable.address_taken;
4199 type_t *type = skip_typeref(entity->declaration.type);
4201 /* is it a variable length array? */
4202 if (is_type_array(type) && !type->array.size_constant) {
4203 create_variable_length_array(entity);
4205 } else if (is_type_array(type) || is_type_compound(type)) {
4206 needs_entity = true;
4207 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4208 needs_entity = true;
4212 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4213 create_variable_entity(entity,
4214 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4217 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4218 entity->variable.v.value_number = next_value_number_function;
4219 set_irg_loc_description(current_ir_graph, next_value_number_function,
4221 ++next_value_number_function;
4225 static void create_local_static_variable(entity_t *entity)
4227 assert(entity->kind == ENTITY_VARIABLE);
4228 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4230 type_t *type = skip_typeref(entity->declaration.type);
4231 ir_type *const var_type = entity->variable.thread_local ?
4232 get_tls_type() : get_glob_type();
4233 ir_type *const irtype = get_ir_type(type);
4234 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4236 size_t l = strlen(entity->base.symbol->string);
4237 char buf[l + sizeof(".%u")];
4238 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4239 ident *const id = id_unique(buf);
4240 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4242 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4243 set_entity_volatility(irentity, volatility_is_volatile);
4246 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4247 entity->variable.v.entity = irentity;
4249 set_entity_ld_ident(irentity, id);
4250 set_entity_visibility(irentity, ir_visibility_local);
4252 if (entity->variable.initializer == NULL) {
4253 ir_initializer_t *null_init = get_initializer_null();
4254 set_entity_initializer(irentity, null_init);
4257 ir_graph *const old_current_ir_graph = current_ir_graph;
4258 current_ir_graph = get_const_code_irg();
4260 create_variable_initializer(entity);
4262 assert(current_ir_graph == get_const_code_irg());
4263 current_ir_graph = old_current_ir_graph;
4268 static ir_node *return_statement_to_firm(return_statement_t *statement)
4270 if (!currently_reachable())
4273 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4274 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4275 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4278 if (!is_type_void(type)) {
4279 ir_mode *const mode = get_ir_mode_storage(type);
4281 res = create_conv(dbgi, res, mode);
4282 res = do_strict_conv(dbgi, res);
4284 res = new_Unknown(mode);
4291 ir_node *const in[1] = { res };
4292 ir_node *const store = get_store();
4293 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4295 ir_node *end_block = get_irg_end_block(current_ir_graph);
4296 add_immBlock_pred(end_block, ret);
4298 set_unreachable_now();
4302 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4304 if (!currently_reachable())
4307 return expression_to_firm(statement->expression);
4310 static void create_local_declarations(entity_t*);
4312 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4314 create_local_declarations(compound->scope.entities);
4316 ir_node *result = NULL;
4317 statement_t *statement = compound->statements;
4318 for ( ; statement != NULL; statement = statement->base.next) {
4319 result = statement_to_firm(statement);
4325 static void create_global_variable(entity_t *entity)
4327 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4328 ir_visibility visibility = ir_visibility_external;
4329 storage_class_tag_t storage
4330 = (storage_class_tag_t)entity->declaration.storage_class;
4331 decl_modifiers_t modifiers = entity->declaration.modifiers;
4332 assert(entity->kind == ENTITY_VARIABLE);
4335 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4336 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4337 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4338 case STORAGE_CLASS_TYPEDEF:
4339 case STORAGE_CLASS_AUTO:
4340 case STORAGE_CLASS_REGISTER:
4341 panic("invalid storage class for global var");
4344 /* "common" symbols */
4345 if (storage == STORAGE_CLASS_NONE
4346 && entity->variable.initializer == NULL
4347 && !entity->variable.thread_local
4348 && (modifiers & DM_WEAK) == 0) {
4349 linkage |= IR_LINKAGE_MERGE;
4352 ir_type *var_type = get_glob_type();
4353 if (entity->variable.thread_local) {
4354 var_type = get_tls_type();
4356 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4357 ir_entity *irentity = entity->variable.v.entity;
4358 add_entity_linkage(irentity, linkage);
4359 set_entity_visibility(irentity, visibility);
4360 if (entity->variable.initializer == NULL
4361 && storage != STORAGE_CLASS_EXTERN) {
4362 ir_initializer_t *null_init = get_initializer_null();
4363 set_entity_initializer(irentity, null_init);
4367 static void create_local_declaration(entity_t *entity)
4369 assert(is_declaration(entity));
4371 /* construct type */
4372 (void) get_ir_type(entity->declaration.type);
4373 if (entity->base.symbol == NULL) {
4377 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4378 case STORAGE_CLASS_STATIC:
4379 if (entity->kind == ENTITY_FUNCTION) {
4380 (void)get_function_entity(entity, NULL);
4382 create_local_static_variable(entity);
4385 case STORAGE_CLASS_EXTERN:
4386 if (entity->kind == ENTITY_FUNCTION) {
4387 assert(entity->function.statement == NULL);
4388 (void)get_function_entity(entity, NULL);
4390 create_global_variable(entity);
4391 create_variable_initializer(entity);
4394 case STORAGE_CLASS_NONE:
4395 case STORAGE_CLASS_AUTO:
4396 case STORAGE_CLASS_REGISTER:
4397 if (entity->kind == ENTITY_FUNCTION) {
4398 if (entity->function.statement != NULL) {
4399 ir_type *owner = get_irg_frame_type(current_ir_graph);
4400 (void)get_function_entity(entity, owner);
4401 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4402 enqueue_inner_function(entity);
4404 (void)get_function_entity(entity, NULL);
4407 create_local_variable(entity);
4410 case STORAGE_CLASS_TYPEDEF:
4413 panic("invalid storage class found");
4416 static void create_local_declarations(entity_t *e)
4418 for (; e; e = e->base.next) {
4419 if (is_declaration(e))
4420 create_local_declaration(e);
4424 static void initialize_local_declaration(entity_t *entity)
4426 if (entity->base.symbol == NULL)
4429 // no need to emit code in dead blocks
4430 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4431 && !currently_reachable())
4434 switch ((declaration_kind_t) entity->declaration.kind) {
4435 case DECLARATION_KIND_LOCAL_VARIABLE:
4436 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4437 create_variable_initializer(entity);
4440 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4441 allocate_variable_length_array(entity);
4444 case DECLARATION_KIND_COMPOUND_MEMBER:
4445 case DECLARATION_KIND_GLOBAL_VARIABLE:
4446 case DECLARATION_KIND_FUNCTION:
4447 case DECLARATION_KIND_INNER_FUNCTION:
4450 case DECLARATION_KIND_PARAMETER:
4451 case DECLARATION_KIND_PARAMETER_ENTITY:
4452 panic("can't initialize parameters");
4454 case DECLARATION_KIND_UNKNOWN:
4455 panic("can't initialize unknown declaration");
4457 panic("invalid declaration kind");
4460 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4462 entity_t *entity = statement->declarations_begin;
4466 entity_t *const last = statement->declarations_end;
4467 for ( ;; entity = entity->base.next) {
4468 if (is_declaration(entity)) {
4469 initialize_local_declaration(entity);
4470 } else if (entity->kind == ENTITY_TYPEDEF) {
4471 /* ยง6.7.7:3 Any array size expressions associated with variable length
4472 * array declarators are evaluated each time the declaration of the
4473 * typedef name is reached in the order of execution. */
4474 type_t *const type = skip_typeref(entity->typedefe.type);
4475 if (is_type_array(type) && type->array.is_vla)
4476 get_vla_size(&type->array);
4485 static ir_node *if_statement_to_firm(if_statement_t *statement)
4487 create_local_declarations(statement->scope.entities);
4489 /* Create the condition. */
4490 ir_node *true_block = NULL;
4491 ir_node *false_block = NULL;
4492 if (currently_reachable()) {
4493 true_block = new_immBlock();
4494 false_block = new_immBlock();
4495 create_condition_evaluation(statement->condition, true_block, false_block);
4496 mature_immBlock(true_block);
4497 mature_immBlock(false_block);
4500 /* Create the true statement. */
4501 set_cur_block(true_block);
4502 statement_to_firm(statement->true_statement);
4503 ir_node *fallthrough_block = get_cur_block();
4505 /* Create the false statement. */
4506 set_cur_block(false_block);
4507 if (statement->false_statement != NULL) {
4508 statement_to_firm(statement->false_statement);
4511 /* Handle the block after the if-statement. Minor simplification and
4512 * optimisation: Reuse the false/true block as fallthrough block, if the
4513 * true/false statement does not pass control to the fallthrough block, e.g.
4514 * in the typical if (x) return; pattern. */
4515 if (fallthrough_block) {
4516 if (currently_reachable()) {
4517 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4518 ir_node *const f_jump = new_Jmp();
4519 ir_node *const in[] = { t_jump, f_jump };
4520 fallthrough_block = new_Block(2, in);
4522 set_cur_block(fallthrough_block);
4529 * Add an unconditional jump to the target block. If the source block is not
4530 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4531 * loops. This is necessary if the jump potentially enters a loop.
4533 static void jump_to(ir_node *const target_block)
4535 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4536 add_immBlock_pred(target_block, pred);
4540 * Add an unconditional jump to the target block, if the current block is
4541 * reachable and do nothing otherwise. This is only valid if the jump does not
4542 * enter a loop (a back edge is ok).
4544 static void jump_if_reachable(ir_node *const target_block)
4546 if (currently_reachable())
4547 add_immBlock_pred(target_block, new_Jmp());
4550 static ir_node *while_statement_to_firm(while_statement_t *statement)
4552 create_local_declarations(statement->scope.entities);
4554 /* Create the header block */
4555 ir_node *const header_block = new_immBlock();
4556 jump_to(header_block);
4558 /* Create the condition. */
4559 ir_node * body_block;
4560 ir_node * false_block;
4561 expression_t *const cond = statement->condition;
4562 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4563 fold_constant_to_bool(cond)) {
4564 /* Shortcut for while (true). */
4565 body_block = header_block;
4568 keep_alive(header_block);
4569 keep_all_memory(header_block);
4571 body_block = new_immBlock();
4572 false_block = new_immBlock();
4574 set_cur_block(header_block);
4575 create_condition_evaluation(cond, body_block, false_block);
4576 mature_immBlock(body_block);
4579 ir_node *const old_continue_label = continue_label;
4580 ir_node *const old_break_label = break_label;
4581 continue_label = header_block;
4582 break_label = false_block;
4584 /* Create the loop body. */
4585 set_cur_block(body_block);
4586 statement_to_firm(statement->body);
4587 jump_if_reachable(header_block);
4589 mature_immBlock(header_block);
4590 assert(false_block == NULL || false_block == break_label);
4591 false_block = break_label;
4592 if (false_block != NULL) {
4593 mature_immBlock(false_block);
4595 set_cur_block(false_block);
4597 assert(continue_label == header_block);
4598 continue_label = old_continue_label;
4599 break_label = old_break_label;
4603 static ir_node *get_break_label(void)
4605 if (break_label == NULL) {
4606 break_label = new_immBlock();
4611 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4613 create_local_declarations(statement->scope.entities);
4615 /* create the header block */
4616 ir_node *header_block = new_immBlock();
4619 ir_node *body_block = new_immBlock();
4620 jump_to(body_block);
4622 ir_node *old_continue_label = continue_label;
4623 ir_node *old_break_label = break_label;
4624 continue_label = header_block;
4627 set_cur_block(body_block);
4628 statement_to_firm(statement->body);
4629 ir_node *const false_block = get_break_label();
4631 assert(continue_label == header_block);
4632 continue_label = old_continue_label;
4633 break_label = old_break_label;
4635 jump_if_reachable(header_block);
4637 /* create the condition */
4638 mature_immBlock(header_block);
4639 set_cur_block(header_block);
4641 create_condition_evaluation(statement->condition, body_block, false_block);
4642 mature_immBlock(body_block);
4643 mature_immBlock(false_block);
4645 set_cur_block(false_block);
4649 static ir_node *for_statement_to_firm(for_statement_t *statement)
4651 create_local_declarations(statement->scope.entities);
4653 if (currently_reachable()) {
4654 entity_t *entity = statement->scope.entities;
4655 for ( ; entity != NULL; entity = entity->base.next) {
4656 if (!is_declaration(entity))
4659 initialize_local_declaration(entity);
4662 if (statement->initialisation != NULL) {
4663 expression_to_firm(statement->initialisation);
4667 /* Create the header block */
4668 ir_node *const header_block = new_immBlock();
4669 jump_to(header_block);
4671 /* Create the condition. */
4672 ir_node *body_block;
4673 ir_node *false_block;
4674 if (statement->condition != NULL) {
4675 body_block = new_immBlock();
4676 false_block = new_immBlock();
4678 set_cur_block(header_block);
4679 create_condition_evaluation(statement->condition, body_block, false_block);
4680 mature_immBlock(body_block);
4683 body_block = header_block;
4686 keep_alive(header_block);
4687 keep_all_memory(header_block);
4690 /* Create the step block, if necessary. */
4691 ir_node * step_block = header_block;
4692 expression_t *const step = statement->step;
4694 step_block = new_immBlock();
4697 ir_node *const old_continue_label = continue_label;
4698 ir_node *const old_break_label = break_label;
4699 continue_label = step_block;
4700 break_label = false_block;
4702 /* Create the loop body. */
4703 set_cur_block(body_block);
4704 statement_to_firm(statement->body);
4705 jump_if_reachable(step_block);
4707 /* Create the step code. */
4709 mature_immBlock(step_block);
4710 set_cur_block(step_block);
4711 expression_to_firm(step);
4712 jump_if_reachable(header_block);
4715 mature_immBlock(header_block);
4716 assert(false_block == NULL || false_block == break_label);
4717 false_block = break_label;
4718 if (false_block != NULL) {
4719 mature_immBlock(false_block);
4721 set_cur_block(false_block);
4723 assert(continue_label == step_block);
4724 continue_label = old_continue_label;
4725 break_label = old_break_label;
4729 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4731 if (!currently_reachable())
4734 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4735 ir_node *jump = new_d_Jmp(dbgi);
4736 add_immBlock_pred(target_block, jump);
4738 set_unreachable_now();
4742 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4744 /* determine number of cases */
4746 for (case_label_statement_t *l = statement->first_case; l != NULL;
4749 if (l->expression == NULL)
4751 if (l->is_empty_range)
4756 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4758 for (case_label_statement_t *l = statement->first_case; l != NULL;
4760 if (l->expression == NULL) {
4761 l->pn = pn_Switch_default;
4764 if (l->is_empty_range)
4766 ir_tarval *min = fold_constant_to_tarval(l->expression);
4767 ir_tarval *max = min;
4768 long pn = (long) i+1;
4769 if (l->end_range != NULL)
4770 max = fold_constant_to_tarval(l->end_range);
4771 ir_switch_table_set(res, i++, min, max, pn);
4777 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4779 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4780 ir_node *switch_node = NULL;
4782 if (currently_reachable()) {
4783 ir_node *expression = expression_to_firm(statement->expression);
4784 ir_switch_table *table = create_switch_table(statement);
4785 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4787 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4790 set_unreachable_now();
4792 ir_node *const old_switch = current_switch;
4793 ir_node *const old_break_label = break_label;
4794 const bool old_saw_default_label = saw_default_label;
4795 saw_default_label = false;
4796 current_switch = switch_node;
4799 statement_to_firm(statement->body);
4801 if (currently_reachable()) {
4802 add_immBlock_pred(get_break_label(), new_Jmp());
4805 if (!saw_default_label && switch_node) {
4806 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4807 add_immBlock_pred(get_break_label(), proj);
4810 if (break_label != NULL) {
4811 mature_immBlock(break_label);
4813 set_cur_block(break_label);
4815 assert(current_switch == switch_node);
4816 current_switch = old_switch;
4817 break_label = old_break_label;
4818 saw_default_label = old_saw_default_label;
4822 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4824 if (statement->is_empty_range)
4827 if (current_switch != NULL) {
4828 ir_node *block = new_immBlock();
4829 /* Fallthrough from previous case */
4830 jump_if_reachable(block);
4832 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4833 add_immBlock_pred(block, proj);
4834 if (statement->expression == NULL)
4835 saw_default_label = true;
4837 mature_immBlock(block);
4838 set_cur_block(block);
4841 return statement_to_firm(statement->statement);
4844 static ir_node *label_to_firm(const label_statement_t *statement)
4846 ir_node *block = get_label_block(statement->label);
4849 set_cur_block(block);
4851 keep_all_memory(block);
4853 return statement_to_firm(statement->statement);
4856 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4858 if (!currently_reachable())
4861 ir_node *const irn = expression_to_firm(statement->expression);
4862 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4863 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
4865 set_irn_link(ijmp, ijmp_list);
4868 set_unreachable_now();
4872 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4874 bool needs_memory = false;
4876 if (statement->is_volatile) {
4877 needs_memory = true;
4880 size_t n_clobbers = 0;
4881 asm_clobber_t *clobber = statement->clobbers;
4882 for ( ; clobber != NULL; clobber = clobber->next) {
4883 const char *clobber_str = clobber->clobber.begin;
4885 if (!be_is_valid_clobber(clobber_str)) {
4886 errorf(&statement->base.source_position,
4887 "invalid clobber '%s' specified", clobber->clobber);
4891 if (streq(clobber_str, "memory")) {
4892 needs_memory = true;
4896 ident *id = new_id_from_str(clobber_str);
4897 obstack_ptr_grow(&asm_obst, id);
4900 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4901 ident **clobbers = NULL;
4902 if (n_clobbers > 0) {
4903 clobbers = obstack_finish(&asm_obst);
4906 size_t n_inputs = 0;
4907 asm_argument_t *argument = statement->inputs;
4908 for ( ; argument != NULL; argument = argument->next)
4910 size_t n_outputs = 0;
4911 argument = statement->outputs;
4912 for ( ; argument != NULL; argument = argument->next)
4915 unsigned next_pos = 0;
4917 ir_node *ins[n_inputs + n_outputs + 1];
4920 ir_asm_constraint tmp_in_constraints[n_outputs];
4922 const expression_t *out_exprs[n_outputs];
4923 ir_node *out_addrs[n_outputs];
4924 size_t out_size = 0;
4926 argument = statement->outputs;
4927 for ( ; argument != NULL; argument = argument->next) {
4928 const char *constraints = argument->constraints.begin;
4929 asm_constraint_flags_t asm_flags
4930 = be_parse_asm_constraints(constraints);
4933 source_position_t const *const pos = &statement->base.source_position;
4934 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4935 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4937 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4938 errorf(pos, "some constraints in '%s' are invalid", constraints);
4941 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4942 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4947 unsigned pos = next_pos++;
4948 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4949 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4950 expression_t *expr = argument->expression;
4951 ir_node *addr = expression_to_addr(expr);
4952 /* in+output, construct an artifical same_as constraint on the
4954 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4956 ir_node *value = get_value_from_lvalue(expr, addr);
4958 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4960 ir_asm_constraint constraint;
4961 constraint.pos = pos;
4962 constraint.constraint = new_id_from_str(buf);
4963 constraint.mode = get_ir_mode_storage(expr->base.type);
4964 tmp_in_constraints[in_size] = constraint;
4965 ins[in_size] = value;
4970 out_exprs[out_size] = expr;
4971 out_addrs[out_size] = addr;
4973 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4974 /* pure memory ops need no input (but we have to make sure we
4975 * attach to the memory) */
4976 assert(! (asm_flags &
4977 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4978 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4979 needs_memory = true;
4981 /* we need to attach the address to the inputs */
4982 expression_t *expr = argument->expression;
4984 ir_asm_constraint constraint;
4985 constraint.pos = pos;
4986 constraint.constraint = new_id_from_str(constraints);
4987 constraint.mode = mode_M;
4988 tmp_in_constraints[in_size] = constraint;
4990 ins[in_size] = expression_to_addr(expr);
4994 errorf(&statement->base.source_position,
4995 "only modifiers but no place set in constraints '%s'",
5000 ir_asm_constraint constraint;
5001 constraint.pos = pos;
5002 constraint.constraint = new_id_from_str(constraints);
5003 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5005 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5007 assert(obstack_object_size(&asm_obst)
5008 == out_size * sizeof(ir_asm_constraint));
5009 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5012 obstack_grow(&asm_obst, tmp_in_constraints,
5013 in_size * sizeof(tmp_in_constraints[0]));
5014 /* find and count input and output arguments */
5015 argument = statement->inputs;
5016 for ( ; argument != NULL; argument = argument->next) {
5017 const char *constraints = argument->constraints.begin;
5018 asm_constraint_flags_t asm_flags
5019 = be_parse_asm_constraints(constraints);
5021 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5022 errorf(&statement->base.source_position,
5023 "some constraints in '%s' are not supported", constraints);
5026 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5027 errorf(&statement->base.source_position,
5028 "some constraints in '%s' are invalid", constraints);
5031 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5032 errorf(&statement->base.source_position,
5033 "write flag specified for input constraints '%s'",
5039 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5040 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5041 /* we can treat this as "normal" input */
5042 input = expression_to_firm(argument->expression);
5043 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5044 /* pure memory ops need no input (but we have to make sure we
5045 * attach to the memory) */
5046 assert(! (asm_flags &
5047 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5048 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5049 needs_memory = true;
5050 input = expression_to_addr(argument->expression);
5052 errorf(&statement->base.source_position,
5053 "only modifiers but no place set in constraints '%s'",
5058 ir_asm_constraint constraint;
5059 constraint.pos = next_pos++;
5060 constraint.constraint = new_id_from_str(constraints);
5061 constraint.mode = get_irn_mode(input);
5063 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5064 ins[in_size++] = input;
5068 ir_asm_constraint constraint;
5069 constraint.pos = next_pos++;
5070 constraint.constraint = new_id_from_str("");
5071 constraint.mode = mode_M;
5073 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5074 ins[in_size++] = get_store();
5077 assert(obstack_object_size(&asm_obst)
5078 == in_size * sizeof(ir_asm_constraint));
5079 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5081 /* create asm node */
5082 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5084 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5086 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5087 out_size, output_constraints,
5088 n_clobbers, clobbers, asm_text);
5090 if (statement->is_volatile) {
5091 set_irn_pinned(node, op_pin_state_pinned);
5093 set_irn_pinned(node, op_pin_state_floats);
5096 /* create output projs & connect them */
5098 ir_node *projm = new_Proj(node, mode_M, out_size);
5103 for (i = 0; i < out_size; ++i) {
5104 const expression_t *out_expr = out_exprs[i];
5106 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5107 ir_node *proj = new_Proj(node, mode, pn);
5108 ir_node *addr = out_addrs[i];
5110 set_value_for_expression_addr(out_expr, proj, addr);
5116 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5118 statement_to_firm(statement->try_statement);
5119 source_position_t const *const pos = &statement->base.source_position;
5120 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5124 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5126 errorf(&statement->base.source_position, "__leave not supported yet");
5131 * Transform a statement.
5133 static ir_node *statement_to_firm(statement_t *const stmt)
5136 assert(!stmt->base.transformed);
5137 stmt->base.transformed = true;
5140 switch (stmt->kind) {
5141 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5142 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5143 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5144 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5145 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5146 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5147 case STATEMENT_EMPTY: return NULL; /* nothing */
5148 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5149 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5150 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5151 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5152 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5153 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5154 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5155 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5156 case STATEMENT_WHILE: return while_statement_to_firm( &stmt->whiles);
5158 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5159 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5160 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5162 case STATEMENT_ERROR: panic("error statement found");
5164 panic("statement not implemented");
5167 static int count_local_variables(const entity_t *entity,
5168 const entity_t *const last)
5171 entity_t const *const end = last != NULL ? last->base.next : NULL;
5172 for (; entity != end; entity = entity->base.next) {
5173 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5174 !entity->variable.address_taken &&
5175 is_type_scalar(skip_typeref(entity->declaration.type)))
5181 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5183 int *const count = env;
5185 switch (stmt->kind) {
5186 case STATEMENT_DECLARATION: {
5187 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5188 *count += count_local_variables(decl_stmt->declarations_begin,
5189 decl_stmt->declarations_end);
5194 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5203 * Return the number of local (alias free) variables used by a function.
5205 static int get_function_n_local_vars(entity_t *entity)
5207 const function_t *function = &entity->function;
5210 /* count parameters */
5211 count += count_local_variables(function->parameters.entities, NULL);
5213 /* count local variables declared in body */
5214 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5219 * Build Firm code for the parameters of a function.
5221 static void initialize_function_parameters(entity_t *entity)
5223 assert(entity->kind == ENTITY_FUNCTION);
5224 ir_graph *irg = current_ir_graph;
5225 ir_node *args = get_irg_args(irg);
5227 ir_type *function_irtype;
5229 if (entity->function.need_closure) {
5230 /* add an extra parameter for the static link */
5231 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5234 /* Matze: IMO this is wrong, nested functions should have an own
5235 * type and not rely on strange parameters... */
5236 function_irtype = create_method_type(&entity->declaration.type->function, true);
5238 function_irtype = get_ir_type(entity->declaration.type);
5243 entity_t *parameter = entity->function.parameters.entities;
5244 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5245 if (parameter->kind != ENTITY_PARAMETER)
5248 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5249 type_t *type = skip_typeref(parameter->declaration.type);
5251 assert(!is_type_array(type));
5252 bool const needs_entity = parameter->variable.address_taken || is_type_compound(type);
5254 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5256 ir_type *frame_type = get_irg_frame_type(irg);
5258 = new_parameter_entity(frame_type, n, param_irtype);
5259 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5260 parameter->variable.v.entity = param;
5264 ir_mode *param_mode = get_type_mode(param_irtype);
5266 ir_node *value = new_r_Proj(args, param_mode, pn);
5268 ir_mode *mode = get_ir_mode_storage(type);
5269 value = create_conv(NULL, value, mode);
5270 value = do_strict_conv(NULL, value);
5272 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5273 parameter->variable.v.value_number = next_value_number_function;
5274 set_irg_loc_description(current_ir_graph, next_value_number_function,
5276 ++next_value_number_function;
5278 set_value(parameter->variable.v.value_number, value);
5283 * Handle additional decl modifiers for IR-graphs
5285 * @param irg the IR-graph
5286 * @param dec_modifiers additional modifiers
5288 static void handle_decl_modifier_irg(ir_graph *irg,
5289 decl_modifiers_t decl_modifiers)
5291 if (decl_modifiers & DM_NAKED) {
5292 /* TRUE if the declaration includes the Microsoft
5293 __declspec(naked) specifier. */
5294 add_irg_additional_properties(irg, mtp_property_naked);
5296 if (decl_modifiers & DM_FORCEINLINE) {
5297 /* TRUE if the declaration includes the
5298 Microsoft __forceinline specifier. */
5299 set_irg_inline_property(irg, irg_inline_forced);
5301 if (decl_modifiers & DM_NOINLINE) {
5302 /* TRUE if the declaration includes the Microsoft
5303 __declspec(noinline) specifier. */
5304 set_irg_inline_property(irg, irg_inline_forbidden);
5308 static void add_function_pointer(ir_type *segment, ir_entity *method,
5309 const char *unique_template)
5311 ir_type *method_type = get_entity_type(method);
5312 ir_type *ptr_type = new_type_pointer(method_type);
5314 /* these entities don't really have a name but firm only allows
5316 * Note that we mustn't give these entities a name since for example
5317 * Mach-O doesn't allow them. */
5318 ident *ide = id_unique(unique_template);
5319 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5320 ir_graph *irg = get_const_code_irg();
5321 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5324 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5325 set_entity_compiler_generated(ptr, 1);
5326 set_entity_visibility(ptr, ir_visibility_private);
5327 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5328 set_atomic_ent_value(ptr, val);
5332 * Generate possible IJmp branches to a given label block.
5334 static void gen_ijmp_branches(ir_node *block)
5337 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5338 add_immBlock_pred(block, ijmp);
5343 * Create code for a function and all inner functions.
5345 * @param entity the function entity
5347 static void create_function(entity_t *entity)
5349 assert(entity->kind == ENTITY_FUNCTION);
5350 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5352 if (entity->function.statement == NULL)
5355 inner_functions = NULL;
5356 current_trampolines = NULL;
5358 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5359 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5360 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5362 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5363 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5364 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5367 current_function_entity = entity;
5368 current_function_name = NULL;
5369 current_funcsig = NULL;
5371 assert(all_labels == NULL);
5372 all_labels = NEW_ARR_F(label_t *, 0);
5375 int n_local_vars = get_function_n_local_vars(entity);
5376 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5377 current_ir_graph = irg;
5379 ir_graph *old_current_function = current_function;
5380 current_function = irg;
5382 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5383 current_vararg_entity = NULL;
5385 set_irg_fp_model(irg, firm_fp_model);
5386 tarval_enable_fp_ops(1);
5387 set_irn_dbg_info(get_irg_start_block(irg),
5388 get_entity_dbg_info(function_entity));
5390 /* set inline flags */
5391 if (entity->function.is_inline)
5392 set_irg_inline_property(irg, irg_inline_recomended);
5393 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5395 next_value_number_function = 0;
5396 initialize_function_parameters(entity);
5397 current_static_link = entity->function.static_link;
5399 statement_to_firm(entity->function.statement);
5401 ir_node *end_block = get_irg_end_block(irg);
5403 /* do we have a return statement yet? */
5404 if (currently_reachable()) {
5405 type_t *type = skip_typeref(entity->declaration.type);
5406 assert(is_type_function(type));
5407 type_t *const return_type = skip_typeref(type->function.return_type);
5410 if (is_type_void(return_type)) {
5411 ret = new_Return(get_store(), 0, NULL);
5413 ir_mode *const mode = get_ir_mode_storage(return_type);
5416 /* ยง5.1.2.2.3 main implicitly returns 0 */
5417 if (is_main(entity)) {
5418 in[0] = new_Const(get_mode_null(mode));
5420 in[0] = new_Unknown(mode);
5422 ret = new_Return(get_store(), 1, in);
5424 add_immBlock_pred(end_block, ret);
5427 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5428 label_t *label = all_labels[i];
5429 if (label->address_taken) {
5430 gen_ijmp_branches(label->block);
5432 mature_immBlock(label->block);
5435 DEL_ARR_F(all_labels);
5438 irg_finalize_cons(irg);
5440 /* finalize the frame type */
5441 ir_type *frame_type = get_irg_frame_type(irg);
5442 int n = get_compound_n_members(frame_type);
5445 for (int i = 0; i < n; ++i) {
5446 ir_entity *member = get_compound_member(frame_type, i);
5447 ir_type *entity_type = get_entity_type(member);
5449 int align = get_type_alignment_bytes(entity_type);
5450 if (align > align_all)
5454 misalign = offset % align;
5456 offset += align - misalign;
5460 set_entity_offset(member, offset);
5461 offset += get_type_size_bytes(entity_type);
5463 set_type_size_bytes(frame_type, offset);
5464 set_type_alignment_bytes(frame_type, align_all);
5466 irg_verify(irg, VERIFY_ENFORCE_SSA);
5467 current_vararg_entity = old_current_vararg_entity;
5468 current_function = old_current_function;
5470 if (current_trampolines != NULL) {
5471 DEL_ARR_F(current_trampolines);
5472 current_trampolines = NULL;
5475 /* create inner functions if any */
5476 entity_t **inner = inner_functions;
5477 if (inner != NULL) {
5478 ir_type *rem_outer_frame = current_outer_frame;
5479 current_outer_frame = get_irg_frame_type(current_ir_graph);
5480 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5481 create_function(inner[i]);
5485 current_outer_frame = rem_outer_frame;
5489 static void scope_to_firm(scope_t *scope)
5491 /* first pass: create declarations */
5492 entity_t *entity = scope->entities;
5493 for ( ; entity != NULL; entity = entity->base.next) {
5494 if (entity->base.symbol == NULL)
5497 if (entity->kind == ENTITY_FUNCTION) {
5498 if (entity->function.btk != BUILTIN_NONE) {
5499 /* builtins have no representation */
5502 (void)get_function_entity(entity, NULL);
5503 } else if (entity->kind == ENTITY_VARIABLE) {
5504 create_global_variable(entity);
5505 } else if (entity->kind == ENTITY_NAMESPACE) {
5506 scope_to_firm(&entity->namespacee.members);
5510 /* second pass: create code/initializers */
5511 entity = scope->entities;
5512 for ( ; entity != NULL; entity = entity->base.next) {
5513 if (entity->base.symbol == NULL)
5516 if (entity->kind == ENTITY_FUNCTION) {
5517 if (entity->function.btk != BUILTIN_NONE) {
5518 /* builtins have no representation */
5521 create_function(entity);
5522 } else if (entity->kind == ENTITY_VARIABLE) {
5523 assert(entity->declaration.kind
5524 == DECLARATION_KIND_GLOBAL_VARIABLE);
5525 current_ir_graph = get_const_code_irg();
5526 create_variable_initializer(entity);
5531 void init_ast2firm(void)
5533 obstack_init(&asm_obst);
5534 init_atomic_modes();
5536 ir_set_debug_retrieve(dbg_retrieve);
5537 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5539 /* create idents for all known runtime functions */
5540 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5541 rts_idents[i] = new_id_from_str(rts_data[i].name);
5544 entitymap_init(&entitymap);
5547 static void init_ir_types(void)
5549 static int ir_types_initialized = 0;
5550 if (ir_types_initialized)
5552 ir_types_initialized = 1;
5554 ir_type_char = get_ir_type(type_char);
5555 ir_type_wchar_t = get_ir_type(type_wchar_t);
5557 be_params = be_get_backend_param();
5558 mode_float_arithmetic = be_params->mode_float_arithmetic;
5560 stack_param_align = be_params->stack_param_align;
5563 void exit_ast2firm(void)
5565 entitymap_destroy(&entitymap);
5566 obstack_free(&asm_obst, NULL);
5569 static void global_asm_to_firm(statement_t *s)
5571 for (; s != NULL; s = s->base.next) {
5572 assert(s->kind == STATEMENT_ASM);
5574 char const *const text = s->asms.asm_text.begin;
5575 size_t const size = s->asms.asm_text.size;
5576 ident *const id = new_id_from_chars(text, size);
5581 static const char *get_cwd(void)
5583 static char buf[1024];
5585 getcwd(buf, sizeof(buf));
5589 void translation_unit_to_firm(translation_unit_t *unit)
5591 if (c_mode & _CXX) {
5592 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5593 } else if (c_mode & _C99) {
5594 be_dwarf_set_source_language(DW_LANG_C99);
5595 } else if (c_mode & _C89) {
5596 be_dwarf_set_source_language(DW_LANG_C89);
5598 be_dwarf_set_source_language(DW_LANG_C);
5600 be_dwarf_set_compilation_directory(get_cwd());
5602 /* initialize firm arithmetic */
5603 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5604 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5606 /* just to be sure */
5607 continue_label = NULL;
5609 current_switch = NULL;
5610 current_translation_unit = unit;
5614 scope_to_firm(&unit->scope);
5615 global_asm_to_firm(unit->global_asm);
5617 current_ir_graph = NULL;
5618 current_translation_unit = NULL;