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
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
35 #include "adt/strutil.h"
43 #include "diagnostic.h"
44 #include "lang_features.h"
46 #include "type_hash.h"
51 #include "entitymap_t.h"
52 #include "driver/firm_opt.h"
54 typedef struct trampoline_region trampoline_region;
55 struct trampoline_region {
56 ir_entity *function; /**< The function that is called by this trampoline */
57 ir_entity *region; /**< created region for the trampoline */
60 fp_model_t firm_fp_model = fp_model_precise;
62 static const backend_params *be_params;
64 static ir_type *ir_type_char;
65 static ir_type *ir_type_const_char;
66 static ir_type *ir_type_wchar_t;
67 static ir_type *ir_type_void;
68 static ir_type *ir_type_int;
70 /* architecture specific floating point arithmetic mode (if any) */
71 static ir_mode *mode_float_arithmetic;
73 /* alignment of stack parameters */
74 static unsigned stack_param_align;
76 static int next_value_number_function;
77 static ir_node *continue_label;
78 static ir_node *break_label;
79 static ir_node *current_switch;
80 static bool saw_default_label;
81 static label_t **all_labels;
82 static entity_t **inner_functions;
83 static ir_node *ijmp_list;
84 static bool constant_folding;
86 static const entity_t *current_function_entity;
87 static ir_node *current_function_name;
88 static ir_node *current_funcsig;
89 static ir_graph *current_function;
90 static translation_unit_t *current_translation_unit;
91 static trampoline_region *current_trampolines;
92 static ir_type *current_outer_frame;
93 static ir_node *current_static_link;
94 static ir_entity *current_vararg_entity;
96 static entitymap_t entitymap;
98 static struct obstack asm_obst;
100 typedef enum declaration_kind_t {
101 DECLARATION_KIND_UNKNOWN,
102 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
103 DECLARATION_KIND_GLOBAL_VARIABLE,
104 DECLARATION_KIND_LOCAL_VARIABLE,
105 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
106 DECLARATION_KIND_PARAMETER,
107 DECLARATION_KIND_PARAMETER_ENTITY,
108 DECLARATION_KIND_FUNCTION,
109 DECLARATION_KIND_COMPOUND_MEMBER,
110 DECLARATION_KIND_INNER_FUNCTION
111 } declaration_kind_t;
113 static ir_type *get_ir_type_incomplete(type_t *type);
115 static void enqueue_inner_function(entity_t *entity)
117 if (inner_functions == NULL)
118 inner_functions = NEW_ARR_F(entity_t *, 0);
119 ARR_APP1(entity_t*, inner_functions, entity);
122 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
124 const entity_t *entity = get_irg_loc_description(irg, pos);
126 if (entity != NULL) {
127 source_position_t const *const pos = &entity->base.source_position;
128 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
130 return new_r_Unknown(irg, mode);
133 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
135 const source_position_t *pos = (const source_position_t*) dbg;
140 return pos->input_name;
143 static dbg_info *get_dbg_info(const source_position_t *pos)
145 return (dbg_info*) pos;
148 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
149 const type_dbg_info *dbg)
152 print_to_buffer(buffer, buffer_size);
153 const type_t *type = (const type_t*) dbg;
155 finish_print_to_buffer();
158 static type_dbg_info *get_type_dbg_info_(const type_t *type)
160 return (type_dbg_info*) type;
163 /* is the current block a reachable one? */
164 static bool currently_reachable(void)
166 ir_node *const block = get_cur_block();
167 return block != NULL && !is_Bad(block);
170 static void set_unreachable_now(void)
175 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
177 static ir_node *_expression_to_firm(const expression_t *expression);
178 static ir_node *expression_to_firm(const expression_t *expression);
179 static void create_local_declaration(entity_t *entity);
181 static unsigned decide_modulo_shift(unsigned type_size)
183 if (architecture_modulo_shift == 0)
185 if (type_size < architecture_modulo_shift)
186 return architecture_modulo_shift;
190 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
192 unsigned flags = get_atomic_type_flags(kind);
193 unsigned size = get_atomic_type_size(kind);
194 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
195 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
198 } else if (size == 8) {
201 panic("unexpected kind");
203 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
205 unsigned bit_size = size * 8;
206 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
207 unsigned modulo_shift = decide_modulo_shift(bit_size);
209 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
210 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
218 * Initialises the atomic modes depending on the machine size.
220 static void init_atomic_modes(void)
222 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
223 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
224 if (atomic_modes[i] != NULL)
226 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
230 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
232 assert(kind <= ATOMIC_TYPE_LAST);
233 return atomic_modes[kind];
236 static ir_node *get_vla_size(array_type_t *const type)
238 ir_node *size_node = type->size_node;
239 if (size_node == NULL) {
240 size_node = expression_to_firm(type->size_expression);
241 type->size_node = size_node;
246 static unsigned count_parameters(const function_type_t *function_type)
250 function_parameter_t *parameter = function_type->parameters;
251 for ( ; parameter != NULL; parameter = parameter->next) {
259 * Creates a Firm type for an atomic type
261 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
263 ir_mode *mode = atomic_modes[akind];
264 type_dbg_info *dbgi = get_type_dbg_info_(type);
265 ir_type *irtype = new_d_type_primitive(mode, dbgi);
266 il_alignment_t alignment = get_atomic_type_alignment(akind);
268 set_type_size_bytes(irtype, get_atomic_type_size(akind));
269 set_type_alignment_bytes(irtype, alignment);
275 * Creates a Firm type for a complex type
277 static ir_type *create_complex_type(const atomic_type_t *type)
279 atomic_type_kind_t kind = type->akind;
280 ir_mode *mode = atomic_modes[kind];
281 ident *id = get_mode_ident(mode);
285 /* FIXME: finish the array */
290 * Creates a Firm type for an imaginary type
292 static ir_type *create_imaginary_type(const atomic_type_t *type)
294 return create_atomic_type(type->akind, (const type_t*)type);
298 * return type of a parameter (and take transparent union gnu extension into
301 static type_t *get_parameter_type(type_t *orig_type)
303 type_t *type = skip_typeref(orig_type);
304 if (is_type_union(type)
305 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
306 compound_t *compound = type->compound.compound;
307 type = compound->members.entities->declaration.type;
313 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
315 type_t *return_type = skip_typeref(function_type->return_type);
317 int n_parameters = count_parameters(function_type)
318 + (for_closure ? 1 : 0);
319 int n_results = return_type == type_void ? 0 : 1;
320 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
321 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
323 if (return_type != type_void) {
324 ir_type *restype = get_ir_type(return_type);
325 set_method_res_type(irtype, 0, restype);
328 function_parameter_t *parameter = function_type->parameters;
331 ir_type *p_irtype = get_ir_type(type_void_ptr);
332 set_method_param_type(irtype, n, p_irtype);
335 for ( ; parameter != NULL; parameter = parameter->next) {
336 type_t *type = get_parameter_type(parameter->type);
337 ir_type *p_irtype = get_ir_type(type);
338 set_method_param_type(irtype, n, p_irtype);
342 bool is_variadic = function_type->variadic;
345 set_method_variadicity(irtype, variadicity_variadic);
347 unsigned cc = get_method_calling_convention(irtype);
348 switch (function_type->calling_convention) {
349 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
352 set_method_calling_convention(irtype, SET_CDECL(cc));
359 /* only non-variadic function can use stdcall, else use cdecl */
360 set_method_calling_convention(irtype, SET_STDCALL(cc));
366 /* only non-variadic function can use fastcall, else use cdecl */
367 set_method_calling_convention(irtype, SET_FASTCALL(cc));
371 /* Hmm, leave default, not accepted by the parser yet. */
376 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
378 const decl_modifiers_t modifiers = function_type->modifiers;
379 if (modifiers & DM_CONST)
380 add_method_additional_properties(irtype, mtp_property_const);
381 if (modifiers & DM_PURE)
382 add_method_additional_properties(irtype, mtp_property_pure);
383 if (modifiers & DM_RETURNS_TWICE)
384 add_method_additional_properties(irtype, mtp_property_returns_twice);
385 if (modifiers & DM_NORETURN)
386 add_method_additional_properties(irtype, mtp_property_noreturn);
387 if (modifiers & DM_NOTHROW)
388 add_method_additional_properties(irtype, mtp_property_nothrow);
389 if (modifiers & DM_MALLOC)
390 add_method_additional_properties(irtype, mtp_property_malloc);
395 static ir_type *create_pointer_type(pointer_type_t *type)
397 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
398 type_t *points_to = type->points_to;
399 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
400 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
405 static ir_type *create_reference_type(reference_type_t *type)
407 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
408 type_t *refers_to = type->refers_to;
409 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
410 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
415 static ir_type *create_array_type(array_type_t *type)
417 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
418 type_t *element_type = type->element_type;
419 ir_type *ir_element_type = get_ir_type(element_type);
420 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
422 const int align = get_type_alignment_bytes(ir_element_type);
423 set_type_alignment_bytes(irtype, align);
425 if (type->size_constant) {
426 int n_elements = type->size;
428 set_array_bounds_int(irtype, 0, 0, n_elements);
430 size_t elemsize = get_type_size_bytes(ir_element_type);
431 if (elemsize % align > 0) {
432 elemsize += align - (elemsize % align);
434 set_type_size_bytes(irtype, n_elements * elemsize);
436 set_array_lower_bound_int(irtype, 0, 0);
438 set_type_state(irtype, layout_fixed);
444 * Return the signed integer type of size bits.
446 * @param size the size
448 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
452 static ir_mode *s_modes[64 + 1] = {NULL, };
456 if (size <= 0 || size > 64)
459 mode = s_modes[size];
463 snprintf(name, sizeof(name), "bf_I%u", size);
464 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
465 s_modes[size] = mode;
468 type_dbg_info *dbgi = get_type_dbg_info_(type);
469 res = new_d_type_primitive(mode, dbgi);
470 set_primitive_base_type(res, base_tp);
476 * Return the unsigned integer type of size bits.
478 * @param size the size
480 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
484 static ir_mode *u_modes[64 + 1] = {NULL, };
488 if (size <= 0 || size > 64)
491 mode = u_modes[size];
495 snprintf(name, sizeof(name), "bf_U%u", size);
496 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
497 u_modes[size] = mode;
500 type_dbg_info *dbgi = get_type_dbg_info_(type);
501 res = new_d_type_primitive(mode, dbgi);
502 set_primitive_base_type(res, base_tp);
507 static ir_type *create_bitfield_type(const entity_t *entity)
509 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
510 type_t *base = skip_typeref(entity->declaration.type);
511 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
512 ir_type *irbase = get_ir_type(base);
514 unsigned bit_size = entity->compound_member.bit_size;
516 assert(!is_type_float(base));
517 if (is_type_signed(base)) {
518 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
520 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
524 #define INVALID_TYPE ((ir_type*)-1)
527 COMPOUND_IS_STRUCT = false,
528 COMPOUND_IS_UNION = true
532 * Construct firm type from ast struct type.
534 static ir_type *create_compound_type(compound_type_t *type,
535 bool incomplete, bool is_union)
537 compound_t *compound = type->compound;
539 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
540 return compound->irtype;
543 symbol_t *type_symbol = compound->base.symbol;
545 if (type_symbol != NULL) {
546 id = new_id_from_str(type_symbol->string);
549 id = id_unique("__anonymous_union.%u");
551 id = id_unique("__anonymous_struct.%u");
557 irtype = new_type_union(id);
559 irtype = new_type_struct(id);
562 compound->irtype_complete = false;
563 compound->irtype = irtype;
569 layout_union_type(type);
571 layout_struct_type(type);
574 compound->irtype_complete = true;
576 entity_t *entry = compound->members.entities;
577 for ( ; entry != NULL; entry = entry->base.next) {
578 if (entry->kind != ENTITY_COMPOUND_MEMBER)
581 symbol_t *symbol = entry->base.symbol;
582 type_t *entry_type = entry->declaration.type;
584 if (symbol == NULL) {
585 /* anonymous bitfield member, skip */
586 if (entry->compound_member.bitfield)
588 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
589 || entry_type->kind == TYPE_COMPOUND_UNION);
590 ident = id_unique("anon.%u");
592 ident = new_id_from_str(symbol->string);
595 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
597 ir_type *entry_irtype;
598 if (entry->compound_member.bitfield) {
599 entry_irtype = create_bitfield_type(entry);
601 entry_irtype = get_ir_type(entry_type);
603 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
605 set_entity_offset(entity, entry->compound_member.offset);
606 set_entity_offset_bits_remainder(entity,
607 entry->compound_member.bit_offset);
609 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
610 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
611 entry->compound_member.entity = entity;
614 set_type_alignment_bytes(irtype, compound->alignment);
615 set_type_size_bytes(irtype, compound->size);
616 set_type_state(irtype, layout_fixed);
621 static ir_tarval *fold_constant_to_tarval(expression_t const *);
623 static void determine_enum_values(enum_type_t *const type)
625 ir_mode *const mode = atomic_modes[type->base.akind];
626 ir_tarval *const one = get_mode_one(mode);
627 ir_tarval * tv_next = get_mode_null(mode);
629 enum_t *enume = type->enume;
630 entity_t *entry = enume->base.next;
631 for (; entry != NULL; entry = entry->base.next) {
632 if (entry->kind != ENTITY_ENUM_VALUE)
635 expression_t *const init = entry->enum_value.value;
637 tv_next = fold_constant_to_tarval(init);
639 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
640 entry->enum_value.tv = tv_next;
641 tv_next = tarval_add(tv_next, one);
645 static ir_type *create_enum_type(enum_type_t *const type)
647 return create_atomic_type(type->base.akind, (const type_t*) type);
650 static ir_type *get_ir_type_incomplete(type_t *type)
652 assert(type != NULL);
653 type = skip_typeref(type);
655 if (type->base.firm_type != NULL) {
656 assert(type->base.firm_type != INVALID_TYPE);
657 return type->base.firm_type;
660 switch (type->kind) {
661 case TYPE_COMPOUND_STRUCT:
662 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
663 case TYPE_COMPOUND_UNION:
664 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
666 return get_ir_type(type);
670 ir_type *get_ir_type(type_t *type)
672 assert(type != NULL);
674 type = skip_typeref(type);
676 if (type->base.firm_type != NULL) {
677 assert(type->base.firm_type != INVALID_TYPE);
678 return type->base.firm_type;
681 ir_type *firm_type = NULL;
682 switch (type->kind) {
684 firm_type = create_atomic_type(type->atomic.akind, type);
687 firm_type = create_complex_type(&type->atomic);
690 firm_type = create_imaginary_type(&type->atomic);
693 firm_type = create_method_type(&type->function, false);
696 firm_type = create_pointer_type(&type->pointer);
699 firm_type = create_reference_type(&type->reference);
702 firm_type = create_array_type(&type->array);
704 case TYPE_COMPOUND_STRUCT:
705 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
707 case TYPE_COMPOUND_UNION:
708 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
711 firm_type = create_enum_type(&type->enumt);
719 if (firm_type == NULL)
720 panic("unknown type found");
722 type->base.firm_type = firm_type;
726 static ir_mode *get_ir_mode_storage(type_t *type)
728 ir_type *irtype = get_ir_type(type);
730 /* firm doesn't report a mode for arrays somehow... */
731 if (is_Array_type(irtype)) {
735 ir_mode *mode = get_type_mode(irtype);
736 assert(mode != NULL);
741 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
742 * int that it returns bigger modes for floating point on some platforms
743 * (x87 internally does arithemtic with 80bits)
745 static ir_mode *get_ir_mode_arithmetic(type_t *type)
747 ir_mode *mode = get_ir_mode_storage(type);
748 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
749 return mode_float_arithmetic;
756 * Return a node representing the size of a type.
758 static ir_node *get_type_size_node(type_t *type)
761 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
762 type = skip_typeref(type);
764 if (is_type_array(type) && type->array.is_vla) {
765 ir_node *size_node = get_vla_size(&type->array);
766 ir_node *elem_size = get_type_size_node(type->array.element_type);
767 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
771 size = get_type_size(type);
772 return new_Const_long(mode, size);
775 /** Names of the runtime functions. */
776 static const struct {
777 int id; /**< the rts id */
778 int n_res; /**< number of return values */
779 const char *name; /**< the name of the rts function */
780 int n_params; /**< number of parameters */
781 unsigned flags; /**< language flags */
783 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
784 { rts_abort, 0, "abort", 0, _C89 },
785 { rts_alloca, 1, "alloca", 1, _ALL },
786 { rts_abs, 1, "abs", 1, _C89 },
787 { rts_labs, 1, "labs", 1, _C89 },
788 { rts_llabs, 1, "llabs", 1, _C99 },
789 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
791 { rts_fabs, 1, "fabs", 1, _C89 },
792 { rts_sqrt, 1, "sqrt", 1, _C89 },
793 { rts_cbrt, 1, "cbrt", 1, _C99 },
794 { rts_exp, 1, "exp", 1, _C89 },
795 { rts_exp2, 1, "exp2", 1, _C89 },
796 { rts_exp10, 1, "exp10", 1, _GNUC },
797 { rts_log, 1, "log", 1, _C89 },
798 { rts_log2, 1, "log2", 1, _C89 },
799 { rts_log10, 1, "log10", 1, _C89 },
800 { rts_pow, 1, "pow", 2, _C89 },
801 { rts_sin, 1, "sin", 1, _C89 },
802 { rts_cos, 1, "cos", 1, _C89 },
803 { rts_tan, 1, "tan", 1, _C89 },
804 { rts_asin, 1, "asin", 1, _C89 },
805 { rts_acos, 1, "acos", 1, _C89 },
806 { rts_atan, 1, "atan", 1, _C89 },
807 { rts_sinh, 1, "sinh", 1, _C89 },
808 { rts_cosh, 1, "cosh", 1, _C89 },
809 { rts_tanh, 1, "tanh", 1, _C89 },
811 { rts_fabsf, 1, "fabsf", 1, _C99 },
812 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
813 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
814 { rts_expf, 1, "expf", 1, _C99 },
815 { rts_exp2f, 1, "exp2f", 1, _C99 },
816 { rts_exp10f, 1, "exp10f", 1, _GNUC },
817 { rts_logf, 1, "logf", 1, _C99 },
818 { rts_log2f, 1, "log2f", 1, _C99 },
819 { rts_log10f, 1, "log10f", 1, _C99 },
820 { rts_powf, 1, "powf", 2, _C99 },
821 { rts_sinf, 1, "sinf", 1, _C99 },
822 { rts_cosf, 1, "cosf", 1, _C99 },
823 { rts_tanf, 1, "tanf", 1, _C99 },
824 { rts_asinf, 1, "asinf", 1, _C99 },
825 { rts_acosf, 1, "acosf", 1, _C99 },
826 { rts_atanf, 1, "atanf", 1, _C99 },
827 { rts_sinhf, 1, "sinhf", 1, _C99 },
828 { rts_coshf, 1, "coshf", 1, _C99 },
829 { rts_tanhf, 1, "tanhf", 1, _C99 },
831 { rts_fabsl, 1, "fabsl", 1, _C99 },
832 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
833 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
834 { rts_expl, 1, "expl", 1, _C99 },
835 { rts_exp2l, 1, "exp2l", 1, _C99 },
836 { rts_exp10l, 1, "exp10l", 1, _GNUC },
837 { rts_logl, 1, "logl", 1, _C99 },
838 { rts_log2l, 1, "log2l", 1, _C99 },
839 { rts_log10l, 1, "log10l", 1, _C99 },
840 { rts_powl, 1, "powl", 2, _C99 },
841 { rts_sinl, 1, "sinl", 1, _C99 },
842 { rts_cosl, 1, "cosl", 1, _C99 },
843 { rts_tanl, 1, "tanl", 1, _C99 },
844 { rts_asinl, 1, "asinl", 1, _C99 },
845 { rts_acosl, 1, "acosl", 1, _C99 },
846 { rts_atanl, 1, "atanl", 1, _C99 },
847 { rts_sinhl, 1, "sinhl", 1, _C99 },
848 { rts_coshl, 1, "coshl", 1, _C99 },
849 { rts_tanhl, 1, "tanhl", 1, _C99 },
851 { rts_strcmp, 1, "strcmp", 2, _C89 },
852 { rts_strncmp, 1, "strncmp", 3, _C89 },
853 { rts_strcpy, 1, "strcpy", 2, _C89 },
854 { rts_strlen, 1, "strlen", 1, _C89 },
855 { rts_memcpy, 1, "memcpy", 3, _C89 },
856 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
857 { rts_memmove, 1, "memmove", 3, _C89 },
858 { rts_memset, 1, "memset", 3, _C89 },
859 { rts_memcmp, 1, "memcmp", 3, _C89 },
862 static ident *rts_idents[lengthof(rts_data)];
864 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
866 void set_create_ld_ident(ident *(*func)(entity_t*))
868 create_ld_ident = func;
872 * Handle GNU attributes for entities
874 * @param ent the entity
875 * @param decl the routine declaration
877 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
879 assert(is_declaration(entity));
880 decl_modifiers_t modifiers = entity->declaration.modifiers;
882 if (is_method_entity(irentity)) {
883 if (modifiers & DM_PURE) {
884 set_entity_additional_properties(irentity, mtp_property_pure);
886 if (modifiers & DM_CONST) {
887 add_entity_additional_properties(irentity, mtp_property_const);
890 if (modifiers & DM_USED) {
891 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
893 if (modifiers & DM_WEAK) {
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 if (is_main(entity)) {
937 /* force main to C linkage */
938 type_t *type = entity->declaration.type;
939 assert(is_type_function(type));
940 if (type->function.linkage != LINKAGE_C) {
941 type_t *new_type = duplicate_type(type);
942 new_type->function.linkage = LINKAGE_C;
943 type = identify_new_type(new_type);
944 entity->declaration.type = type;
948 symbol_t *symbol = entity->base.symbol;
949 ident *id = new_id_from_str(symbol->string);
951 /* already an entity defined? */
952 ir_entity *irentity = entitymap_get(&entitymap, symbol);
953 bool const has_body = entity->function.statement != NULL;
954 if (irentity != NULL) {
955 if (get_entity_visibility(irentity) == ir_visibility_external
957 set_entity_visibility(irentity, ir_visibility_default);
962 ir_type *ir_type_method;
963 if (entity->function.need_closure)
964 ir_type_method = create_method_type(&entity->declaration.type->function, true);
966 ir_type_method = get_ir_type(entity->declaration.type);
968 bool nested_function = false;
969 if (owner_type == NULL)
970 owner_type = get_glob_type();
972 nested_function = true;
974 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
975 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
979 ld_id = id_unique("inner.%u");
981 ld_id = create_ld_ident(entity);
982 set_entity_ld_ident(irentity, ld_id);
984 handle_decl_modifiers(irentity, entity);
986 if (! nested_function) {
987 /* static inline => local
988 * extern inline => local
989 * inline without definition => local
990 * inline with definition => external_visible */
991 storage_class_tag_t const storage_class
992 = (storage_class_tag_t) entity->declaration.storage_class;
993 bool const is_inline = entity->function.is_inline;
995 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
996 set_entity_visibility(irentity, ir_visibility_default);
997 } else if (storage_class == STORAGE_CLASS_STATIC ||
998 (is_inline && has_body)) {
999 set_entity_visibility(irentity, ir_visibility_local);
1000 } else if (has_body) {
1001 set_entity_visibility(irentity, ir_visibility_default);
1003 set_entity_visibility(irentity, ir_visibility_external);
1006 /* nested functions are always local */
1007 set_entity_visibility(irentity, ir_visibility_local);
1010 /* We should check for file scope here, but as long as we compile C only
1011 this is not needed. */
1012 if (!freestanding && !has_body) {
1013 /* check for a known runtime function */
1014 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1015 if (id != rts_idents[i])
1018 function_type_t *function_type
1019 = &entity->declaration.type->function;
1020 /* rts_entities code can't handle a "wrong" number of parameters */
1021 if (function_type->unspecified_parameters)
1024 /* check number of parameters */
1025 int n_params = count_parameters(function_type);
1026 if (n_params != rts_data[i].n_params)
1029 type_t *return_type = skip_typeref(function_type->return_type);
1030 int n_res = return_type != type_void ? 1 : 0;
1031 if (n_res != rts_data[i].n_res)
1034 /* ignore those rts functions not necessary needed for current mode */
1035 if ((c_mode & rts_data[i].flags) == 0)
1037 assert(rts_entities[rts_data[i].id] == NULL);
1038 rts_entities[rts_data[i].id] = irentity;
1042 entitymap_insert(&entitymap, symbol, irentity);
1045 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1046 entity->function.irentity = irentity;
1052 * Creates a SymConst for a given entity.
1054 * @param dbgi debug info
1055 * @param entity the entity
1057 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1059 assert(entity != NULL);
1060 union symconst_symbol sym;
1061 sym.entity_p = entity;
1062 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1065 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1067 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1070 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1073 if (is_Const(value)) {
1074 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1077 ir_node *cond = new_d_Cond(dbgi, value);
1078 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1079 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1080 ir_node *tblock = new_Block(1, &proj_true);
1081 ir_node *fblock = new_Block(1, &proj_false);
1082 set_cur_block(tblock);
1083 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1084 ir_node *tjump = new_Jmp();
1085 set_cur_block(fblock);
1086 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1087 ir_node *fjump = new_Jmp();
1089 ir_node *in[2] = { tjump, fjump };
1090 ir_node *mergeblock = new_Block(2, in);
1091 set_cur_block(mergeblock);
1092 ir_node *phi_in[2] = { const1, const0 };
1093 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1097 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1099 ir_mode *value_mode = get_irn_mode(value);
1101 if (value_mode == dest_mode)
1104 if (dest_mode == mode_b) {
1105 ir_node *zero = new_Const(get_mode_null(value_mode));
1106 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1108 } else if (value_mode == mode_b) {
1109 return create_conv_from_b(dbgi, value, dest_mode);
1112 return new_d_Conv(dbgi, value, dest_mode);
1116 * Creates a SymConst node representing a wide string literal.
1118 * @param literal the wide string literal
1120 static ir_node *wide_string_literal_to_firm(
1121 const string_literal_expression_t *literal)
1123 ir_type *const global_type = get_glob_type();
1124 ir_type *const elem_type = ir_type_wchar_t;
1125 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1126 ir_type *const type = new_type_array(1, elem_type);
1128 ident *const id = id_unique("str.%u");
1129 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1130 set_entity_ld_ident(entity, id);
1131 set_entity_visibility(entity, ir_visibility_private);
1132 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1134 ir_mode *const mode = get_type_mode(elem_type);
1135 const size_t slen = wstrlen(&literal->value);
1137 set_array_lower_bound_int(type, 0, 0);
1138 set_array_upper_bound_int(type, 0, slen);
1139 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1140 set_type_state(type, layout_fixed);
1142 ir_initializer_t *initializer = create_initializer_compound(slen);
1143 const char *p = literal->value.begin;
1144 for (size_t i = 0; i < slen; ++i) {
1145 assert(p < literal->value.begin + literal->value.size);
1146 utf32 v = read_utf8_char(&p);
1147 ir_tarval *tv = new_tarval_from_long(v, mode);
1148 ir_initializer_t *val = create_initializer_tarval(tv);
1149 set_initializer_compound_value(initializer, i, val);
1151 set_entity_initializer(entity, initializer);
1153 return create_symconst(dbgi, entity);
1157 * Creates a SymConst node representing a string constant.
1159 * @param src_pos the source position of the string constant
1160 * @param id_prefix a prefix for the name of the generated string constant
1161 * @param value the value of the string constant
1163 static ir_node *string_to_firm(const source_position_t *const src_pos,
1164 const char *const id_prefix,
1165 const string_t *const value)
1167 ir_type *const global_type = get_glob_type();
1168 dbg_info *const dbgi = get_dbg_info(src_pos);
1169 ir_type *const type = new_type_array(1, ir_type_const_char);
1171 ident *const id = id_unique(id_prefix);
1172 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1173 set_entity_ld_ident(entity, id);
1174 set_entity_visibility(entity, ir_visibility_private);
1175 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1177 ir_type *const elem_type = ir_type_const_char;
1178 ir_mode *const mode = get_type_mode(elem_type);
1180 const char* const string = value->begin;
1181 const size_t slen = value->size;
1183 set_array_lower_bound_int(type, 0, 0);
1184 set_array_upper_bound_int(type, 0, slen);
1185 set_type_size_bytes(type, slen);
1186 set_type_state(type, layout_fixed);
1188 ir_initializer_t *initializer = create_initializer_compound(slen);
1189 for (size_t i = 0; i < slen; ++i) {
1190 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1191 ir_initializer_t *val = create_initializer_tarval(tv);
1192 set_initializer_compound_value(initializer, i, val);
1194 set_entity_initializer(entity, initializer);
1196 return create_symconst(dbgi, entity);
1199 static bool try_create_integer(literal_expression_t *literal,
1200 type_t *type, unsigned char base)
1202 const char *string = literal->value.begin;
1203 size_t size = literal->value.size;
1205 assert(type->kind == TYPE_ATOMIC);
1206 atomic_type_kind_t akind = type->atomic.akind;
1208 ir_mode *mode = atomic_modes[akind];
1209 ir_tarval *tv = new_integer_tarval_from_str(string, size, 1, base, mode);
1210 if (tv == tarval_bad)
1213 literal->base.type = type;
1214 literal->target_value = tv;
1218 static void create_integer_tarval(literal_expression_t *literal)
1222 const string_t *suffix = &literal->suffix;
1224 if (suffix->size > 0) {
1225 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1226 if (*c == 'u' || *c == 'U') { ++us; }
1227 if (*c == 'l' || *c == 'L') { ++ls; }
1232 switch (literal->base.kind) {
1233 case EXPR_LITERAL_INTEGER_OCTAL: base = 8; break;
1234 case EXPR_LITERAL_INTEGER: base = 10; break;
1235 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1236 default: panic("invalid literal kind");
1239 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1241 /* now try if the constant is small enough for some types */
1242 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1244 if (us == 0 && try_create_integer(literal, type_int, base))
1246 if ((us == 1 || base != 10)
1247 && try_create_integer(literal, type_unsigned_int, base))
1251 if (us == 0 && try_create_integer(literal, type_long, base))
1253 if ((us == 1 || base != 10)
1254 && try_create_integer(literal, type_unsigned_long, base))
1257 /* last try? then we should not report tarval_bad */
1258 if (us != 1 && base == 10)
1259 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1260 if (us == 0 && try_create_integer(literal, type_long_long, base))
1264 assert(us == 1 || base != 10);
1265 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1266 bool res = try_create_integer(literal, type_unsigned_long_long, base);
1268 panic("internal error when parsing number literal");
1271 tarval_set_integer_overflow_mode(old_mode);
1274 void determine_literal_type(literal_expression_t *literal)
1276 switch (literal->base.kind) {
1277 case EXPR_LITERAL_INTEGER:
1278 case EXPR_LITERAL_INTEGER_OCTAL:
1279 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1280 create_integer_tarval(literal);
1288 * Creates a Const node representing a constant.
1290 static ir_node *literal_to_firm(const literal_expression_t *literal)
1292 type_t *type = skip_typeref(literal->base.type);
1293 ir_mode *mode = get_ir_mode_storage(type);
1294 const char *string = literal->value.begin;
1295 size_t size = literal->value.size;
1298 switch (literal->base.kind) {
1299 case EXPR_LITERAL_WIDE_CHARACTER: {
1300 utf32 v = read_utf8_char(&string);
1302 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1304 tv = new_tarval_from_str(buf, len, mode);
1307 case EXPR_LITERAL_CHARACTER: {
1310 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1311 if (size == 1 && char_is_signed) {
1312 v = (signed char)string[0];
1315 for (size_t i = 0; i < size; ++i) {
1316 v = (v << 8) | ((unsigned char)string[i]);
1320 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1322 tv = new_tarval_from_str(buf, len, mode);
1325 case EXPR_LITERAL_INTEGER:
1326 case EXPR_LITERAL_INTEGER_OCTAL:
1327 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1328 assert(literal->target_value != NULL);
1329 tv = literal->target_value;
1331 case EXPR_LITERAL_FLOATINGPOINT:
1332 tv = new_tarval_from_str(string, size, mode);
1334 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1335 char buffer[size + 2];
1336 memcpy(buffer, "0x", 2);
1337 memcpy(buffer+2, string, size);
1338 tv = new_tarval_from_str(buffer, size+2, mode);
1341 case EXPR_LITERAL_BOOLEAN:
1342 if (string[0] == 't') {
1343 tv = get_mode_one(mode);
1345 assert(string[0] == 'f');
1346 tv = get_mode_null(mode);
1349 case EXPR_LITERAL_MS_NOOP:
1350 tv = get_mode_null(mode);
1355 panic("Invalid literal kind found");
1358 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1359 ir_node *res = new_d_Const(dbgi, tv);
1360 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1361 return create_conv(dbgi, res, mode_arith);
1365 * Allocate an area of size bytes aligned at alignment
1368 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1370 static unsigned area_cnt = 0;
1373 ir_type *tp = new_type_array(1, ir_type_char);
1374 set_array_bounds_int(tp, 0, 0, size);
1375 set_type_alignment_bytes(tp, alignment);
1377 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1378 ident *name = new_id_from_str(buf);
1379 ir_entity *area = new_entity(frame_type, name, tp);
1381 /* mark this entity as compiler generated */
1382 set_entity_compiler_generated(area, 1);
1387 * Return a node representing a trampoline region
1388 * for a given function entity.
1390 * @param dbgi debug info
1391 * @param entity the function entity
1393 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1395 ir_entity *region = NULL;
1398 if (current_trampolines != NULL) {
1399 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1400 if (current_trampolines[i].function == entity) {
1401 region = current_trampolines[i].region;
1406 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1408 ir_graph *irg = current_ir_graph;
1409 if (region == NULL) {
1410 /* create a new region */
1411 ir_type *frame_tp = get_irg_frame_type(irg);
1412 trampoline_region reg;
1413 reg.function = entity;
1415 reg.region = alloc_trampoline(frame_tp,
1416 be_params->trampoline_size,
1417 be_params->trampoline_align);
1418 ARR_APP1(trampoline_region, current_trampolines, reg);
1419 region = reg.region;
1421 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1426 * Creates a trampoline for a function represented by an entity.
1428 * @param dbgi debug info
1429 * @param mode the (reference) mode for the function address
1430 * @param entity the function entity
1432 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1435 assert(entity != NULL);
1437 in[0] = get_trampoline_region(dbgi, entity);
1438 in[1] = create_symconst(dbgi, entity);
1439 in[2] = get_irg_frame(current_ir_graph);
1441 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1442 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1443 return new_Proj(irn, mode, pn_Builtin_max+1);
1447 * Dereference an address.
1449 * @param dbgi debug info
1450 * @param type the type of the dereferenced result (the points_to type)
1451 * @param addr the address to dereference
1453 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1454 ir_node *const addr)
1456 type_t *skipped = skip_typeref(type);
1457 if (is_type_incomplete(skipped))
1460 ir_type *irtype = get_ir_type(skipped);
1461 if (is_compound_type(irtype)
1462 || is_Method_type(irtype)
1463 || is_Array_type(irtype)) {
1467 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1468 ? cons_volatile : cons_none;
1469 ir_mode *const mode = get_type_mode(irtype);
1470 ir_node *const memory = get_store();
1471 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1472 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1473 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1475 set_store(load_mem);
1477 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1478 return create_conv(dbgi, load_res, mode_arithmetic);
1482 * Creates a strict Conv (to the node's mode) if necessary.
1484 * @param dbgi debug info
1485 * @param node the node to strict conv
1487 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1489 ir_mode *mode = get_irn_mode(node);
1491 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1493 if (!mode_is_float(mode))
1496 /* check if there is already a Conv */
1497 if (is_Conv(node)) {
1498 /* convert it into a strict Conv */
1499 set_Conv_strict(node, 1);
1503 /* otherwise create a new one */
1504 return new_d_strictConv(dbgi, node, mode);
1508 * Returns the correct base address depending on whether it is a parameter or a
1509 * normal local variable.
1511 static ir_node *get_local_frame(ir_entity *const ent)
1513 ir_graph *const irg = current_ir_graph;
1514 const ir_type *const owner = get_entity_owner(ent);
1515 if (owner == current_outer_frame) {
1516 assert(current_static_link != NULL);
1517 return current_static_link;
1519 return get_irg_frame(irg);
1524 * Keep all memory edges of the given block.
1526 static void keep_all_memory(ir_node *block)
1528 ir_node *old = get_cur_block();
1530 set_cur_block(block);
1531 keep_alive(get_store());
1532 /* TODO: keep all memory edges from restricted pointers */
1536 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1538 entity_t *entity = ref->entity;
1539 if (entity->enum_value.tv == NULL) {
1540 type_t *type = skip_typeref(entity->enum_value.enum_type);
1541 assert(type->kind == TYPE_ENUM);
1542 determine_enum_values(&type->enumt);
1545 return new_Const(entity->enum_value.tv);
1548 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1550 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1551 entity_t *entity = ref->entity;
1552 assert(is_declaration(entity));
1553 type_t *type = skip_typeref(entity->declaration.type);
1555 /* make sure the type is constructed */
1556 (void) get_ir_type(type);
1558 if (entity->kind == ENTITY_FUNCTION
1559 && entity->function.btk != BUILTIN_NONE) {
1560 ir_entity *irentity = get_function_entity(entity, NULL);
1561 /* for gcc compatibility we have to produce (dummy) addresses for some
1562 * builtins which don't have entities */
1563 if (irentity == NULL) {
1564 source_position_t const *const pos = &ref->base.source_position;
1565 symbol_t const *const sym = ref->entity->base.symbol;
1566 warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1568 /* simply create a NULL pointer */
1569 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1570 ir_node *res = new_Const(get_mode_null(mode));
1576 switch ((declaration_kind_t) entity->declaration.kind) {
1577 case DECLARATION_KIND_UNKNOWN:
1580 case DECLARATION_KIND_LOCAL_VARIABLE: {
1581 ir_mode *const mode = get_ir_mode_storage(type);
1582 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1583 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1585 case DECLARATION_KIND_PARAMETER: {
1586 ir_mode *const mode = get_ir_mode_storage(type);
1587 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1588 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1590 case DECLARATION_KIND_FUNCTION: {
1591 return create_symconst(dbgi, entity->function.irentity);
1593 case DECLARATION_KIND_INNER_FUNCTION: {
1594 ir_mode *const mode = get_ir_mode_storage(type);
1595 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1596 /* inner function not using the closure */
1597 return create_symconst(dbgi, entity->function.irentity);
1599 /* need trampoline here */
1600 return create_trampoline(dbgi, mode, entity->function.irentity);
1603 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1604 const variable_t *variable = &entity->variable;
1605 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1606 return deref_address(dbgi, variable->base.type, addr);
1609 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1610 ir_entity *irentity = entity->variable.v.entity;
1611 ir_node *frame = get_local_frame(irentity);
1612 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1613 return deref_address(dbgi, entity->declaration.type, sel);
1615 case DECLARATION_KIND_PARAMETER_ENTITY: {
1616 ir_entity *irentity = entity->parameter.v.entity;
1617 ir_node *frame = get_local_frame(irentity);
1618 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1619 return deref_address(dbgi, entity->declaration.type, sel);
1622 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1623 return entity->variable.v.vla_base;
1625 case DECLARATION_KIND_COMPOUND_MEMBER:
1626 panic("not implemented reference type");
1629 panic("reference to declaration with unknown type found");
1632 static ir_node *reference_addr(const reference_expression_t *ref)
1634 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1635 entity_t *entity = ref->entity;
1636 assert(is_declaration(entity));
1638 switch((declaration_kind_t) entity->declaration.kind) {
1639 case DECLARATION_KIND_UNKNOWN:
1641 case DECLARATION_KIND_PARAMETER:
1642 case DECLARATION_KIND_LOCAL_VARIABLE:
1643 /* you can store to a local variable (so we don't panic but return NULL
1644 * as an indicator for no real address) */
1646 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1647 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1650 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1651 ir_entity *irentity = entity->variable.v.entity;
1652 ir_node *frame = get_local_frame(irentity);
1653 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1657 case DECLARATION_KIND_PARAMETER_ENTITY: {
1658 ir_entity *irentity = entity->parameter.v.entity;
1659 ir_node *frame = get_local_frame(irentity);
1660 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1665 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1666 return entity->variable.v.vla_base;
1668 case DECLARATION_KIND_FUNCTION: {
1669 return create_symconst(dbgi, entity->function.irentity);
1672 case DECLARATION_KIND_INNER_FUNCTION: {
1673 type_t *const type = skip_typeref(entity->declaration.type);
1674 ir_mode *const mode = get_ir_mode_storage(type);
1675 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1676 /* inner function not using the closure */
1677 return create_symconst(dbgi, entity->function.irentity);
1679 /* need trampoline here */
1680 return create_trampoline(dbgi, mode, entity->function.irentity);
1684 case DECLARATION_KIND_COMPOUND_MEMBER:
1685 panic("not implemented reference type");
1688 panic("reference to declaration with unknown type found");
1692 * Transform calls to builtin functions.
1694 static ir_node *process_builtin_call(const call_expression_t *call)
1696 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1698 assert(call->function->kind == EXPR_REFERENCE);
1699 reference_expression_t *builtin = &call->function->reference;
1701 type_t *expr_type = skip_typeref(builtin->base.type);
1702 assert(is_type_pointer(expr_type));
1704 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1706 switch (builtin->entity->function.btk) {
1709 case BUILTIN_ALLOCA: {
1710 expression_t *argument = call->arguments->expression;
1711 ir_node *size = expression_to_firm(argument);
1713 ir_node *store = get_store();
1714 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1716 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1718 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1723 type_t *type = function_type->function.return_type;
1724 ir_mode *mode = get_ir_mode_arithmetic(type);
1725 ir_tarval *tv = get_mode_infinite(mode);
1726 ir_node *res = new_d_Const(dbgi, tv);
1730 /* Ignore string for now... */
1731 assert(is_type_function(function_type));
1732 type_t *type = function_type->function.return_type;
1733 ir_mode *mode = get_ir_mode_arithmetic(type);
1734 ir_tarval *tv = get_mode_NAN(mode);
1735 ir_node *res = new_d_Const(dbgi, tv);
1738 case BUILTIN_EXPECT: {
1739 expression_t *argument = call->arguments->expression;
1740 return _expression_to_firm(argument);
1742 case BUILTIN_VA_END:
1743 /* evaluate the argument of va_end for its side effects */
1744 _expression_to_firm(call->arguments->expression);
1746 case BUILTIN_OBJECT_SIZE: {
1747 /* determine value of "type" */
1748 expression_t *type_expression = call->arguments->next->expression;
1749 long type_val = fold_constant_to_int(type_expression);
1750 type_t *type = function_type->function.return_type;
1751 ir_mode *mode = get_ir_mode_arithmetic(type);
1752 /* just produce a "I don't know" result */
1753 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1754 get_mode_minus_one(mode);
1756 return new_d_Const(dbgi, result);
1758 case BUILTIN_ROTL: {
1759 ir_node *val = expression_to_firm(call->arguments->expression);
1760 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1761 ir_mode *mode = get_irn_mode(val);
1762 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1763 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1765 case BUILTIN_ROTR: {
1766 ir_node *val = expression_to_firm(call->arguments->expression);
1767 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1768 ir_mode *mode = get_irn_mode(val);
1769 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1770 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1771 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1772 return new_d_Rotl(dbgi, val, sub, mode);
1777 case BUILTIN_LIBC_CHECK:
1778 panic("builtin did not produce an entity");
1780 panic("invalid builtin found");
1784 * Transform a call expression.
1785 * Handles some special cases, like alloca() calls, which must be resolved
1786 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1787 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1790 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1792 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1793 assert(currently_reachable());
1795 expression_t *function = call->function;
1796 ir_node *callee = NULL;
1797 bool firm_builtin = false;
1798 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1799 if (function->kind == EXPR_REFERENCE) {
1800 const reference_expression_t *ref = &function->reference;
1801 entity_t *entity = ref->entity;
1803 if (entity->kind == ENTITY_FUNCTION) {
1804 builtin_kind_t builtin = entity->function.btk;
1805 if (builtin == BUILTIN_FIRM) {
1806 firm_builtin = true;
1807 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1808 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1809 && builtin != BUILTIN_LIBC_CHECK) {
1810 return process_builtin_call(call);
1815 callee = expression_to_firm(function);
1817 type_t *type = skip_typeref(function->base.type);
1818 assert(is_type_pointer(type));
1819 pointer_type_t *pointer_type = &type->pointer;
1820 type_t *points_to = skip_typeref(pointer_type->points_to);
1821 assert(is_type_function(points_to));
1822 function_type_t *function_type = &points_to->function;
1824 int n_parameters = 0;
1825 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1826 ir_type *new_method_type = NULL;
1827 if (function_type->variadic || function_type->unspecified_parameters) {
1828 const call_argument_t *argument = call->arguments;
1829 for ( ; argument != NULL; argument = argument->next) {
1833 /* we need to construct a new method type matching the call
1835 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1836 int n_res = get_method_n_ress(ir_method_type);
1837 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1838 set_method_calling_convention(new_method_type,
1839 get_method_calling_convention(ir_method_type));
1840 set_method_additional_properties(new_method_type,
1841 get_method_additional_properties(ir_method_type));
1842 set_method_variadicity(new_method_type,
1843 get_method_variadicity(ir_method_type));
1845 for (int i = 0; i < n_res; ++i) {
1846 set_method_res_type(new_method_type, i,
1847 get_method_res_type(ir_method_type, i));
1849 argument = call->arguments;
1850 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1851 expression_t *expression = argument->expression;
1852 ir_type *irtype = get_ir_type(expression->base.type);
1853 set_method_param_type(new_method_type, i, irtype);
1855 ir_method_type = new_method_type;
1857 n_parameters = get_method_n_params(ir_method_type);
1860 ir_node *in[n_parameters];
1862 const call_argument_t *argument = call->arguments;
1863 for (int n = 0; n < n_parameters; ++n) {
1864 expression_t *expression = argument->expression;
1865 ir_node *arg_node = expression_to_firm(expression);
1867 type_t *arg_type = skip_typeref(expression->base.type);
1868 if (!is_type_compound(arg_type)) {
1869 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1870 arg_node = create_conv(dbgi, arg_node, mode);
1871 arg_node = do_strict_conv(dbgi, arg_node);
1876 argument = argument->next;
1880 if (function_type->modifiers & DM_CONST) {
1881 store = get_irg_no_mem(current_ir_graph);
1883 store = get_store();
1887 type_t *return_type = skip_typeref(function_type->return_type);
1888 ir_node *result = NULL;
1890 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1892 if (! (function_type->modifiers & DM_CONST)) {
1893 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1897 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1898 assert(is_type_scalar(return_type));
1899 ir_mode *mode = get_ir_mode_storage(return_type);
1900 result = new_Proj(node, mode, pn_Builtin_max+1);
1901 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1902 result = create_conv(NULL, result, mode_arith);
1905 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1906 if (! (function_type->modifiers & DM_CONST)) {
1907 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1911 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1912 ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1914 if (is_type_scalar(return_type)) {
1915 ir_mode *mode = get_ir_mode_storage(return_type);
1916 result = new_Proj(resproj, mode, 0);
1917 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1918 result = create_conv(NULL, result, mode_arith);
1920 ir_mode *mode = mode_P_data;
1921 result = new_Proj(resproj, mode, 0);
1926 if (function_type->modifiers & DM_NORETURN) {
1927 /* A dead end: Keep the Call and the Block. Also place all further
1928 * nodes into a new and unreachable block. */
1930 keep_alive(get_cur_block());
1931 ir_node *block = new_Block(0, NULL);
1932 set_cur_block(block);
1938 static void statement_to_firm(statement_t *statement);
1939 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1941 static ir_node *expression_to_addr(const expression_t *expression);
1942 static ir_node *create_condition_evaluation(const expression_t *expression,
1943 ir_node *true_block,
1944 ir_node *false_block);
1946 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1949 if (!is_type_compound(type)) {
1950 ir_mode *mode = get_ir_mode_storage(type);
1951 value = create_conv(dbgi, value, mode);
1952 value = do_strict_conv(dbgi, value);
1955 ir_node *memory = get_store();
1957 if (is_type_scalar(type)) {
1958 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1959 ? cons_volatile : cons_none;
1960 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1961 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1962 set_store(store_mem);
1964 ir_type *irtype = get_ir_type(type);
1965 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1966 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1967 set_store(copyb_mem);
1971 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1973 ir_tarval *all_one = get_mode_all_one(mode);
1974 int mode_size = get_mode_size_bits(mode);
1975 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1977 assert(offset >= 0);
1979 assert(offset + size <= mode_size);
1980 if (size == mode_size) {
1984 long shiftr = get_mode_size_bits(mode) - size;
1985 long shiftl = offset;
1986 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1987 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1988 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1989 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1994 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1995 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1998 ir_type *entity_type = get_entity_type(entity);
1999 ir_type *base_type = get_primitive_base_type(entity_type);
2000 ir_mode *mode = get_type_mode(base_type);
2001 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2003 value = create_conv(dbgi, value, mode);
2005 /* kill upper bits of value and shift to right position */
2006 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
2007 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
2008 unsigned base_bits = get_mode_size_bits(mode);
2009 unsigned shiftwidth = base_bits - bitsize;
2011 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
2012 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
2014 unsigned shrwidth = base_bits - bitsize - bitoffset;
2015 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
2016 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
2018 /* load current value */
2019 ir_node *mem = get_store();
2020 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2021 set_volatile ? cons_volatile : cons_none);
2022 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2023 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2024 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2025 ir_tarval *inv_mask = tarval_not(shift_mask);
2026 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2027 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2029 /* construct new value and store */
2030 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2031 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2032 set_volatile ? cons_volatile : cons_none);
2033 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2034 set_store(store_mem);
2040 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2041 if (mode_is_signed(mode)) {
2042 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2044 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2049 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2052 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2053 entity_t *entity = expression->compound_entry;
2054 type_t *base_type = entity->declaration.type;
2055 ir_mode *mode = get_ir_mode_storage(base_type);
2056 ir_node *mem = get_store();
2057 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2058 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2059 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2060 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2062 ir_mode *amode = mode;
2063 /* optimisation, since shifting in modes < machine_size is usually
2065 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2068 unsigned amode_size = get_mode_size_bits(amode);
2069 load_res = create_conv(dbgi, load_res, amode);
2071 set_store(load_mem);
2073 /* kill upper bits */
2074 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2075 unsigned bitoffset = entity->compound_member.bit_offset;
2076 unsigned bitsize = entity->compound_member.bit_size;
2077 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
2078 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
2079 ir_node *countl = new_d_Const(dbgi, tvl);
2080 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
2082 unsigned shift_bitsr = bitoffset + shift_bitsl;
2083 assert(shift_bitsr <= amode_size);
2084 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
2085 ir_node *countr = new_d_Const(dbgi, tvr);
2087 if (mode_is_signed(mode)) {
2088 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2090 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2093 type_t *type = expression->base.type;
2094 ir_mode *resmode = get_ir_mode_arithmetic(type);
2095 return create_conv(dbgi, shiftr, resmode);
2098 /* make sure the selected compound type is constructed */
2099 static void construct_select_compound(const select_expression_t *expression)
2101 type_t *type = skip_typeref(expression->compound->base.type);
2102 if (is_type_pointer(type)) {
2103 type = type->pointer.points_to;
2105 (void) get_ir_type(type);
2108 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2109 ir_node *value, ir_node *addr)
2111 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2112 type_t *type = skip_typeref(expression->base.type);
2114 if (!is_type_compound(type)) {
2115 ir_mode *mode = get_ir_mode_storage(type);
2116 value = create_conv(dbgi, value, mode);
2117 value = do_strict_conv(dbgi, value);
2120 if (expression->kind == EXPR_REFERENCE) {
2121 const reference_expression_t *ref = &expression->reference;
2123 entity_t *entity = ref->entity;
2124 assert(is_declaration(entity));
2125 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2126 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2127 set_value(entity->variable.v.value_number, value);
2129 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2130 set_value(entity->parameter.v.value_number, value);
2136 addr = expression_to_addr(expression);
2137 assert(addr != NULL);
2139 if (expression->kind == EXPR_SELECT) {
2140 const select_expression_t *select = &expression->select;
2142 construct_select_compound(select);
2144 entity_t *entity = select->compound_entry;
2145 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2146 if (entity->compound_member.bitfield) {
2147 ir_entity *irentity = entity->compound_member.entity;
2149 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2150 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2151 set_volatile, true);
2156 assign_value(dbgi, addr, type, value);
2160 static void set_value_for_expression(const expression_t *expression,
2163 set_value_for_expression_addr(expression, value, NULL);
2166 static ir_node *get_value_from_lvalue(const expression_t *expression,
2169 if (expression->kind == EXPR_REFERENCE) {
2170 const reference_expression_t *ref = &expression->reference;
2172 entity_t *entity = ref->entity;
2173 assert(entity->kind == ENTITY_VARIABLE
2174 || entity->kind == ENTITY_PARAMETER);
2175 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2177 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2178 value_number = entity->variable.v.value_number;
2179 assert(addr == NULL);
2180 type_t *type = skip_typeref(expression->base.type);
2181 ir_mode *mode = get_ir_mode_storage(type);
2182 ir_node *res = get_value(value_number, mode);
2183 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2184 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2185 value_number = entity->parameter.v.value_number;
2186 assert(addr == NULL);
2187 type_t *type = skip_typeref(expression->base.type);
2188 ir_mode *mode = get_ir_mode_storage(type);
2189 ir_node *res = get_value(value_number, mode);
2190 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2194 assert(addr != NULL);
2195 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2198 if (expression->kind == EXPR_SELECT &&
2199 expression->select.compound_entry->compound_member.bitfield) {
2200 construct_select_compound(&expression->select);
2201 value = bitfield_extract_to_firm(&expression->select, addr);
2203 value = deref_address(dbgi, expression->base.type, addr);
2210 static ir_node *create_incdec(const unary_expression_t *expression)
2212 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2213 const expression_t *value_expr = expression->value;
2214 ir_node *addr = expression_to_addr(value_expr);
2215 ir_node *value = get_value_from_lvalue(value_expr, addr);
2217 type_t *type = skip_typeref(expression->base.type);
2218 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2221 if (is_type_pointer(type)) {
2222 pointer_type_t *pointer_type = &type->pointer;
2223 offset = get_type_size_node(pointer_type->points_to);
2225 assert(is_type_arithmetic(type));
2226 offset = new_Const(get_mode_one(mode));
2230 ir_node *store_value;
2231 switch(expression->base.kind) {
2232 case EXPR_UNARY_POSTFIX_INCREMENT:
2234 store_value = new_d_Add(dbgi, value, offset, mode);
2236 case EXPR_UNARY_POSTFIX_DECREMENT:
2238 store_value = new_d_Sub(dbgi, value, offset, mode);
2240 case EXPR_UNARY_PREFIX_INCREMENT:
2241 result = new_d_Add(dbgi, value, offset, mode);
2242 store_value = result;
2244 case EXPR_UNARY_PREFIX_DECREMENT:
2245 result = new_d_Sub(dbgi, value, offset, mode);
2246 store_value = result;
2249 panic("no incdec expr in create_incdec");
2252 set_value_for_expression_addr(value_expr, store_value, addr);
2257 static bool is_local_variable(expression_t *expression)
2259 if (expression->kind != EXPR_REFERENCE)
2261 reference_expression_t *ref_expr = &expression->reference;
2262 entity_t *entity = ref_expr->entity;
2263 if (entity->kind != ENTITY_VARIABLE)
2265 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2266 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2269 static ir_relation get_relation(const expression_kind_t kind)
2272 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2273 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2274 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2275 case EXPR_BINARY_ISLESS:
2276 case EXPR_BINARY_LESS: return ir_relation_less;
2277 case EXPR_BINARY_ISLESSEQUAL:
2278 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2279 case EXPR_BINARY_ISGREATER:
2280 case EXPR_BINARY_GREATER: return ir_relation_greater;
2281 case EXPR_BINARY_ISGREATEREQUAL:
2282 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2283 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2288 panic("trying to get pn_Cmp from non-comparison binexpr type");
2292 * Handle the assume optimizer hint: check if a Confirm
2293 * node can be created.
2295 * @param dbi debug info
2296 * @param expr the IL assume expression
2298 * we support here only some simple cases:
2303 static ir_node *handle_assume_compare(dbg_info *dbi,
2304 const binary_expression_t *expression)
2306 expression_t *op1 = expression->left;
2307 expression_t *op2 = expression->right;
2308 entity_t *var2, *var = NULL;
2309 ir_node *res = NULL;
2310 ir_relation relation = get_relation(expression->base.kind);
2312 if (is_local_variable(op1) && is_local_variable(op2)) {
2313 var = op1->reference.entity;
2314 var2 = op2->reference.entity;
2316 type_t *const type = skip_typeref(var->declaration.type);
2317 ir_mode *const mode = get_ir_mode_storage(type);
2319 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2320 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2322 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2323 set_value(var2->variable.v.value_number, res);
2325 res = new_d_Confirm(dbi, irn1, irn2, relation);
2326 set_value(var->variable.v.value_number, res);
2331 expression_t *con = NULL;
2332 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2333 var = op1->reference.entity;
2335 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2336 relation = get_inversed_relation(relation);
2337 var = op2->reference.entity;
2342 type_t *const type = skip_typeref(var->declaration.type);
2343 ir_mode *const mode = get_ir_mode_storage(type);
2345 res = get_value(var->variable.v.value_number, mode);
2346 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2347 set_value(var->variable.v.value_number, res);
2353 * Handle the assume optimizer hint.
2355 * @param dbi debug info
2356 * @param expr the IL assume expression
2358 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2360 switch(expression->kind) {
2361 case EXPR_BINARY_EQUAL:
2362 case EXPR_BINARY_NOTEQUAL:
2363 case EXPR_BINARY_LESS:
2364 case EXPR_BINARY_LESSEQUAL:
2365 case EXPR_BINARY_GREATER:
2366 case EXPR_BINARY_GREATEREQUAL:
2367 return handle_assume_compare(dbi, &expression->binary);
2373 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2374 type_t *from_type, type_t *type)
2376 type = skip_typeref(type);
2377 if (type == type_void) {
2378 /* make sure firm type is constructed */
2379 (void) get_ir_type(type);
2382 if (!is_type_scalar(type)) {
2383 /* make sure firm type is constructed */
2384 (void) get_ir_type(type);
2388 from_type = skip_typeref(from_type);
2389 ir_mode *mode = get_ir_mode_storage(type);
2390 /* check for conversion from / to __based types */
2391 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2392 const variable_t *from_var = from_type->pointer.base_variable;
2393 const variable_t *to_var = type->pointer.base_variable;
2394 if (from_var != to_var) {
2395 if (from_var != NULL) {
2396 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2397 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2398 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2400 if (to_var != NULL) {
2401 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2402 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2403 value_node = new_d_Sub(dbgi, value_node, base, mode);
2408 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2409 /* bool adjustments (we save a mode_Bu, but have to temporarily
2410 * convert to mode_b so we only get a 0/1 value */
2411 value_node = create_conv(dbgi, value_node, mode_b);
2414 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2415 ir_node *node = create_conv(dbgi, value_node, mode);
2416 node = do_strict_conv(dbgi, node);
2417 node = create_conv(dbgi, node, mode_arith);
2422 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2424 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2425 type_t *type = skip_typeref(expression->base.type);
2427 const expression_t *value = expression->value;
2429 switch(expression->base.kind) {
2430 case EXPR_UNARY_TAKE_ADDRESS:
2431 return expression_to_addr(value);
2433 case EXPR_UNARY_NEGATE: {
2434 ir_node *value_node = expression_to_firm(value);
2435 ir_mode *mode = get_ir_mode_arithmetic(type);
2436 return new_d_Minus(dbgi, value_node, mode);
2438 case EXPR_UNARY_PLUS:
2439 return expression_to_firm(value);
2440 case EXPR_UNARY_BITWISE_NEGATE: {
2441 ir_node *value_node = expression_to_firm(value);
2442 ir_mode *mode = get_ir_mode_arithmetic(type);
2443 return new_d_Not(dbgi, value_node, mode);
2445 case EXPR_UNARY_NOT: {
2446 ir_node *value_node = _expression_to_firm(value);
2447 value_node = create_conv(dbgi, value_node, mode_b);
2448 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2451 case EXPR_UNARY_DEREFERENCE: {
2452 ir_node *value_node = expression_to_firm(value);
2453 type_t *value_type = skip_typeref(value->base.type);
2454 assert(is_type_pointer(value_type));
2456 /* check for __based */
2457 const variable_t *const base_var = value_type->pointer.base_variable;
2458 if (base_var != NULL) {
2459 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2460 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2461 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2463 type_t *points_to = value_type->pointer.points_to;
2464 return deref_address(dbgi, points_to, value_node);
2466 case EXPR_UNARY_POSTFIX_INCREMENT:
2467 case EXPR_UNARY_POSTFIX_DECREMENT:
2468 case EXPR_UNARY_PREFIX_INCREMENT:
2469 case EXPR_UNARY_PREFIX_DECREMENT:
2470 return create_incdec(expression);
2471 case EXPR_UNARY_CAST: {
2472 ir_node *value_node = expression_to_firm(value);
2473 type_t *from_type = value->base.type;
2474 return create_cast(dbgi, value_node, from_type, type);
2476 case EXPR_UNARY_ASSUME:
2477 return handle_assume(dbgi, value);
2482 panic("invalid UNEXPR type found");
2486 * produces a 0/1 depending of the value of a mode_b node
2488 static ir_node *produce_condition_result(const expression_t *expression,
2489 ir_mode *mode, dbg_info *dbgi)
2491 ir_node *const one_block = new_immBlock();
2492 ir_node *const zero_block = new_immBlock();
2493 create_condition_evaluation(expression, one_block, zero_block);
2494 mature_immBlock(one_block);
2495 mature_immBlock(zero_block);
2497 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2498 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2499 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2500 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2501 set_cur_block(block);
2503 ir_node *const one = new_Const(get_mode_one(mode));
2504 ir_node *const zero = new_Const(get_mode_null(mode));
2505 ir_node *const in[2] = { one, zero };
2506 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2511 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2512 ir_node *value, type_t *type)
2514 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2515 assert(is_type_pointer(type));
2516 pointer_type_t *const pointer_type = &type->pointer;
2517 type_t *const points_to = skip_typeref(pointer_type->points_to);
2518 ir_node * elem_size = get_type_size_node(points_to);
2519 elem_size = create_conv(dbgi, elem_size, mode);
2520 value = create_conv(dbgi, value, mode);
2521 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2525 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2526 ir_node *left, ir_node *right)
2529 type_t *type_left = skip_typeref(expression->left->base.type);
2530 type_t *type_right = skip_typeref(expression->right->base.type);
2532 expression_kind_t kind = expression->base.kind;
2535 case EXPR_BINARY_SHIFTLEFT:
2536 case EXPR_BINARY_SHIFTRIGHT:
2537 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2538 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2539 mode = get_ir_mode_arithmetic(expression->base.type);
2540 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2543 case EXPR_BINARY_SUB:
2544 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2545 const pointer_type_t *const ptr_type = &type_left->pointer;
2547 mode = get_ir_mode_arithmetic(expression->base.type);
2548 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2549 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2550 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2551 ir_node *const no_mem = new_NoMem();
2552 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2553 mode, op_pin_state_floats);
2554 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2557 case EXPR_BINARY_SUB_ASSIGN:
2558 if (is_type_pointer(type_left)) {
2559 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2560 mode = get_ir_mode_arithmetic(type_left);
2565 case EXPR_BINARY_ADD:
2566 case EXPR_BINARY_ADD_ASSIGN:
2567 if (is_type_pointer(type_left)) {
2568 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2569 mode = get_ir_mode_arithmetic(type_left);
2571 } else if (is_type_pointer(type_right)) {
2572 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2573 mode = get_ir_mode_arithmetic(type_right);
2580 mode = get_ir_mode_arithmetic(type_right);
2581 left = create_conv(dbgi, left, mode);
2586 case EXPR_BINARY_ADD_ASSIGN:
2587 case EXPR_BINARY_ADD:
2588 return new_d_Add(dbgi, left, right, mode);
2589 case EXPR_BINARY_SUB_ASSIGN:
2590 case EXPR_BINARY_SUB:
2591 return new_d_Sub(dbgi, left, right, mode);
2592 case EXPR_BINARY_MUL_ASSIGN:
2593 case EXPR_BINARY_MUL:
2594 return new_d_Mul(dbgi, left, right, mode);
2595 case EXPR_BINARY_BITWISE_AND:
2596 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2597 return new_d_And(dbgi, left, right, mode);
2598 case EXPR_BINARY_BITWISE_OR:
2599 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2600 return new_d_Or(dbgi, left, right, mode);
2601 case EXPR_BINARY_BITWISE_XOR:
2602 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2603 return new_d_Eor(dbgi, left, right, mode);
2604 case EXPR_BINARY_SHIFTLEFT:
2605 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2606 return new_d_Shl(dbgi, left, right, mode);
2607 case EXPR_BINARY_SHIFTRIGHT:
2608 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2609 if (mode_is_signed(mode)) {
2610 return new_d_Shrs(dbgi, left, right, mode);
2612 return new_d_Shr(dbgi, left, right, mode);
2614 case EXPR_BINARY_DIV:
2615 case EXPR_BINARY_DIV_ASSIGN: {
2616 ir_node *pin = new_Pin(new_NoMem());
2617 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2618 op_pin_state_floats);
2619 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2622 case EXPR_BINARY_MOD:
2623 case EXPR_BINARY_MOD_ASSIGN: {
2624 ir_node *pin = new_Pin(new_NoMem());
2625 assert(!mode_is_float(mode));
2626 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2627 op_pin_state_floats);
2628 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2632 panic("unexpected expression kind");
2636 static ir_node *create_lazy_op(const binary_expression_t *expression)
2638 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2639 type_t *type = skip_typeref(expression->base.type);
2640 ir_mode *mode = get_ir_mode_arithmetic(type);
2642 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2643 bool val = fold_constant_to_bool(expression->left);
2644 expression_kind_t ekind = expression->base.kind;
2645 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2646 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2648 return new_Const(get_mode_null(mode));
2652 return new_Const(get_mode_one(mode));
2656 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2657 bool valr = fold_constant_to_bool(expression->right);
2658 return create_Const_from_bool(mode, valr);
2661 return produce_condition_result(expression->right, mode, dbgi);
2664 return produce_condition_result((const expression_t*) expression, mode,
2668 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2669 ir_node *right, ir_mode *mode);
2671 static ir_node *create_assign_binop(const binary_expression_t *expression)
2673 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2674 const expression_t *left_expr = expression->left;
2675 type_t *type = skip_typeref(left_expr->base.type);
2676 ir_node *right = expression_to_firm(expression->right);
2677 ir_node *left_addr = expression_to_addr(left_expr);
2678 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2679 ir_node *result = create_op(dbgi, expression, left, right);
2681 result = create_cast(dbgi, result, expression->right->base.type, type);
2682 result = do_strict_conv(dbgi, result);
2684 result = set_value_for_expression_addr(left_expr, result, left_addr);
2686 if (!is_type_compound(type)) {
2687 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2688 result = create_conv(dbgi, result, mode_arithmetic);
2693 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2695 expression_kind_t kind = expression->base.kind;
2698 case EXPR_BINARY_EQUAL:
2699 case EXPR_BINARY_NOTEQUAL:
2700 case EXPR_BINARY_LESS:
2701 case EXPR_BINARY_LESSEQUAL:
2702 case EXPR_BINARY_GREATER:
2703 case EXPR_BINARY_GREATEREQUAL:
2704 case EXPR_BINARY_ISGREATER:
2705 case EXPR_BINARY_ISGREATEREQUAL:
2706 case EXPR_BINARY_ISLESS:
2707 case EXPR_BINARY_ISLESSEQUAL:
2708 case EXPR_BINARY_ISLESSGREATER:
2709 case EXPR_BINARY_ISUNORDERED: {
2710 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2711 ir_node *left = expression_to_firm(expression->left);
2712 ir_node *right = expression_to_firm(expression->right);
2713 ir_relation relation = get_relation(kind);
2714 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2717 case EXPR_BINARY_ASSIGN: {
2718 ir_node *addr = expression_to_addr(expression->left);
2719 ir_node *right = expression_to_firm(expression->right);
2721 = set_value_for_expression_addr(expression->left, right, addr);
2723 type_t *type = skip_typeref(expression->base.type);
2724 if (!is_type_compound(type)) {
2725 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2726 res = create_conv(NULL, res, mode_arithmetic);
2730 case EXPR_BINARY_ADD:
2731 case EXPR_BINARY_SUB:
2732 case EXPR_BINARY_MUL:
2733 case EXPR_BINARY_DIV:
2734 case EXPR_BINARY_MOD:
2735 case EXPR_BINARY_BITWISE_AND:
2736 case EXPR_BINARY_BITWISE_OR:
2737 case EXPR_BINARY_BITWISE_XOR:
2738 case EXPR_BINARY_SHIFTLEFT:
2739 case EXPR_BINARY_SHIFTRIGHT:
2741 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2742 ir_node *left = expression_to_firm(expression->left);
2743 ir_node *right = expression_to_firm(expression->right);
2744 return create_op(dbgi, expression, left, right);
2746 case EXPR_BINARY_LOGICAL_AND:
2747 case EXPR_BINARY_LOGICAL_OR:
2748 return create_lazy_op(expression);
2749 case EXPR_BINARY_COMMA:
2750 /* create side effects of left side */
2751 (void) expression_to_firm(expression->left);
2752 return _expression_to_firm(expression->right);
2754 case EXPR_BINARY_ADD_ASSIGN:
2755 case EXPR_BINARY_SUB_ASSIGN:
2756 case EXPR_BINARY_MUL_ASSIGN:
2757 case EXPR_BINARY_MOD_ASSIGN:
2758 case EXPR_BINARY_DIV_ASSIGN:
2759 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2760 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2761 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2762 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2763 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2764 return create_assign_binop(expression);
2766 panic("TODO binexpr type");
2770 static ir_node *array_access_addr(const array_access_expression_t *expression)
2772 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2773 ir_node *base_addr = expression_to_firm(expression->array_ref);
2774 ir_node *offset = expression_to_firm(expression->index);
2775 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2776 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2777 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2782 static ir_node *array_access_to_firm(
2783 const array_access_expression_t *expression)
2785 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2786 ir_node *addr = array_access_addr(expression);
2787 type_t *type = revert_automatic_type_conversion(
2788 (const expression_t*) expression);
2789 type = skip_typeref(type);
2791 return deref_address(dbgi, type, addr);
2794 static long get_offsetof_offset(const offsetof_expression_t *expression)
2796 type_t *orig_type = expression->type;
2799 designator_t *designator = expression->designator;
2800 for ( ; designator != NULL; designator = designator->next) {
2801 type_t *type = skip_typeref(orig_type);
2802 /* be sure the type is constructed */
2803 (void) get_ir_type(type);
2805 if (designator->symbol != NULL) {
2806 assert(is_type_compound(type));
2807 symbol_t *symbol = designator->symbol;
2809 compound_t *compound = type->compound.compound;
2810 entity_t *iter = compound->members.entities;
2811 for ( ; iter != NULL; iter = iter->base.next) {
2812 if (iter->base.symbol == symbol) {
2816 assert(iter != NULL);
2818 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2819 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2820 offset += get_entity_offset(iter->compound_member.entity);
2822 orig_type = iter->declaration.type;
2824 expression_t *array_index = designator->array_index;
2825 assert(designator->array_index != NULL);
2826 assert(is_type_array(type));
2828 long index = fold_constant_to_int(array_index);
2829 ir_type *arr_type = get_ir_type(type);
2830 ir_type *elem_type = get_array_element_type(arr_type);
2831 long elem_size = get_type_size_bytes(elem_type);
2833 offset += index * elem_size;
2835 orig_type = type->array.element_type;
2842 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2844 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2845 long offset = get_offsetof_offset(expression);
2846 ir_tarval *tv = new_tarval_from_long(offset, mode);
2847 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2849 return new_d_Const(dbgi, tv);
2852 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2853 ir_entity *entity, type_t *type);
2854 static ir_initializer_t *create_ir_initializer(
2855 const initializer_t *initializer, type_t *type);
2857 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2858 initializer_t *initializer,
2861 /* create the ir_initializer */
2862 ir_graph *const old_current_ir_graph = current_ir_graph;
2863 current_ir_graph = get_const_code_irg();
2865 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2867 assert(current_ir_graph == get_const_code_irg());
2868 current_ir_graph = old_current_ir_graph;
2870 ident *const id = id_unique("initializer.%u");
2871 ir_type *const irtype = get_ir_type(type);
2872 ir_type *const global_type = get_glob_type();
2873 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2874 set_entity_ld_ident(entity, id);
2875 set_entity_visibility(entity, ir_visibility_private);
2876 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2877 set_entity_initializer(entity, irinitializer);
2881 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2883 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2884 type_t *type = expression->type;
2885 initializer_t *initializer = expression->initializer;
2887 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2888 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2889 return create_symconst(dbgi, entity);
2891 /* create an entity on the stack */
2892 ident *const id = id_unique("CompLit.%u");
2893 ir_type *const irtype = get_ir_type(type);
2894 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2896 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2897 set_entity_ld_ident(entity, id);
2899 /* create initialisation code */
2900 create_local_initializer(initializer, dbgi, entity, type);
2902 /* create a sel for the compound literal address */
2903 ir_node *frame = get_irg_frame(current_ir_graph);
2904 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2909 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2911 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2912 type_t *const type = expr->type;
2913 ir_node *const addr = compound_literal_addr(expr);
2914 return deref_address(dbgi, type, addr);
2918 * Transform a sizeof expression into Firm code.
2920 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2922 type_t *const type = skip_typeref(expression->type);
2923 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2924 if (is_type_array(type) && type->array.is_vla
2925 && expression->tp_expression != NULL) {
2926 expression_to_firm(expression->tp_expression);
2928 /* strange gnu extensions: sizeof(function) == 1 */
2929 if (is_type_function(type)) {
2930 ir_mode *mode = get_ir_mode_storage(type_size_t);
2931 return new_Const(get_mode_one(mode));
2934 return get_type_size_node(type);
2937 static entity_t *get_expression_entity(const expression_t *expression)
2939 if (expression->kind != EXPR_REFERENCE)
2942 return expression->reference.entity;
2945 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2947 switch(entity->kind) {
2948 case DECLARATION_KIND_CASES:
2949 return entity->declaration.alignment;
2952 return entity->compound.alignment;
2953 case ENTITY_TYPEDEF:
2954 return entity->typedefe.alignment;
2962 * Transform an alignof expression into Firm code.
2964 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2966 unsigned alignment = 0;
2968 const expression_t *tp_expression = expression->tp_expression;
2969 if (tp_expression != NULL) {
2970 entity_t *entity = get_expression_entity(tp_expression);
2971 if (entity != NULL) {
2972 if (entity->kind == ENTITY_FUNCTION) {
2973 /* a gnu-extension */
2976 alignment = get_cparser_entity_alignment(entity);
2981 if (alignment == 0) {
2982 type_t *type = expression->type;
2983 alignment = get_type_alignment(type);
2986 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2987 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2988 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2989 return new_d_Const(dbgi, tv);
2992 static void init_ir_types(void);
2994 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2996 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2998 bool constant_folding_old = constant_folding;
2999 constant_folding = true;
3000 int old_optimize = get_optimize();
3001 int old_constant_folding = get_opt_constant_folding();
3003 set_opt_constant_folding(1);
3007 ir_graph *old_current_ir_graph = current_ir_graph;
3008 current_ir_graph = get_const_code_irg();
3010 ir_node *cnst = expression_to_firm(expression);
3011 current_ir_graph = old_current_ir_graph;
3012 set_optimize(old_optimize);
3013 set_opt_constant_folding(old_constant_folding);
3015 if (!is_Const(cnst)) {
3016 panic("couldn't fold constant");
3019 constant_folding = constant_folding_old;
3021 return get_Const_tarval(cnst);
3024 /* this function is only used in parser.c, but it relies on libfirm functionality */
3025 bool constant_is_negative(const expression_t *expression)
3027 ir_tarval *tv = fold_constant_to_tarval(expression);
3028 return tarval_is_negative(tv);
3031 long fold_constant_to_int(const expression_t *expression)
3033 ir_tarval *tv = fold_constant_to_tarval(expression);
3034 if (!tarval_is_long(tv)) {
3035 panic("result of constant folding is not integer");
3038 return get_tarval_long(tv);
3041 bool fold_constant_to_bool(const expression_t *expression)
3043 ir_tarval *tv = fold_constant_to_tarval(expression);
3044 return !tarval_is_null(tv);
3047 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3049 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3051 /* first try to fold a constant condition */
3052 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3053 bool val = fold_constant_to_bool(expression->condition);
3055 expression_t *true_expression = expression->true_expression;
3056 if (true_expression == NULL)
3057 true_expression = expression->condition;
3058 return expression_to_firm(true_expression);
3060 return expression_to_firm(expression->false_expression);
3064 ir_node *const true_block = new_immBlock();
3065 ir_node *const false_block = new_immBlock();
3066 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3067 mature_immBlock(true_block);
3068 mature_immBlock(false_block);
3070 set_cur_block(true_block);
3072 if (expression->true_expression != NULL) {
3073 true_val = expression_to_firm(expression->true_expression);
3074 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3075 true_val = cond_expr;
3077 /* Condition ended with a short circuit (&&, ||, !) operation or a
3078 * comparison. Generate a "1" as value for the true branch. */
3079 true_val = new_Const(get_mode_one(mode_Is));
3081 ir_node *const true_jmp = new_d_Jmp(dbgi);
3083 set_cur_block(false_block);
3084 ir_node *const false_val = expression_to_firm(expression->false_expression);
3085 ir_node *const false_jmp = new_d_Jmp(dbgi);
3087 /* create the common block */
3088 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3089 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3090 set_cur_block(block);
3092 /* TODO improve static semantics, so either both or no values are NULL */
3093 if (true_val == NULL || false_val == NULL)
3096 ir_node *const in[2] = { true_val, false_val };
3097 type_t *const type = skip_typeref(expression->base.type);
3099 if (is_type_compound(type)) {
3102 mode = get_ir_mode_arithmetic(type);
3104 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3110 * Returns an IR-node representing the address of a field.
3112 static ir_node *select_addr(const select_expression_t *expression)
3114 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3116 construct_select_compound(expression);
3118 ir_node *compound_addr = expression_to_firm(expression->compound);
3120 entity_t *entry = expression->compound_entry;
3121 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3122 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3124 if (constant_folding) {
3125 ir_mode *mode = get_irn_mode(compound_addr);
3126 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3127 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3128 return new_d_Add(dbgi, compound_addr, ofs, mode);
3130 ir_entity *irentity = entry->compound_member.entity;
3131 assert(irentity != NULL);
3132 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3136 static ir_node *select_to_firm(const select_expression_t *expression)
3138 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3139 ir_node *addr = select_addr(expression);
3140 type_t *type = revert_automatic_type_conversion(
3141 (const expression_t*) expression);
3142 type = skip_typeref(type);
3144 entity_t *entry = expression->compound_entry;
3145 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3147 if (entry->compound_member.bitfield) {
3148 return bitfield_extract_to_firm(expression, addr);
3151 return deref_address(dbgi, type, addr);
3154 /* Values returned by __builtin_classify_type. */
3155 typedef enum gcc_type_class
3161 enumeral_type_class,
3164 reference_type_class,
3168 function_type_class,
3179 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3181 type_t *type = expr->type_expression->base.type;
3183 /* FIXME gcc returns different values depending on whether compiling C or C++
3184 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3187 type = skip_typeref(type);
3188 switch (type->kind) {
3190 const atomic_type_t *const atomic_type = &type->atomic;
3191 switch (atomic_type->akind) {
3192 /* should not be reached */
3193 case ATOMIC_TYPE_INVALID:
3197 /* gcc cannot do that */
3198 case ATOMIC_TYPE_VOID:
3199 tc = void_type_class;
3202 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3203 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3204 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3205 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3206 case ATOMIC_TYPE_SHORT:
3207 case ATOMIC_TYPE_USHORT:
3208 case ATOMIC_TYPE_INT:
3209 case ATOMIC_TYPE_UINT:
3210 case ATOMIC_TYPE_LONG:
3211 case ATOMIC_TYPE_ULONG:
3212 case ATOMIC_TYPE_LONGLONG:
3213 case ATOMIC_TYPE_ULONGLONG:
3214 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3215 tc = integer_type_class;
3218 case ATOMIC_TYPE_FLOAT:
3219 case ATOMIC_TYPE_DOUBLE:
3220 case ATOMIC_TYPE_LONG_DOUBLE:
3221 tc = real_type_class;
3224 panic("Unexpected atomic type in classify_type_to_firm().");
3227 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3228 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3229 case TYPE_ARRAY: /* gcc handles this as pointer */
3230 case TYPE_FUNCTION: /* gcc handles this as pointer */
3231 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3232 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3233 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3235 /* gcc handles this as integer */
3236 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3238 /* gcc classifies the referenced type */
3239 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3241 /* typedef/typeof should be skipped already */
3247 panic("unexpected TYPE classify_type_to_firm().");
3251 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3252 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3253 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3254 return new_d_Const(dbgi, tv);
3257 static ir_node *function_name_to_firm(
3258 const funcname_expression_t *const expr)
3260 switch(expr->kind) {
3261 case FUNCNAME_FUNCTION:
3262 case FUNCNAME_PRETTY_FUNCTION:
3263 case FUNCNAME_FUNCDNAME:
3264 if (current_function_name == NULL) {
3265 const source_position_t *const src_pos = &expr->base.source_position;
3266 const char *name = current_function_entity->base.symbol->string;
3267 const string_t string = { name, strlen(name) + 1 };
3268 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3270 return current_function_name;
3271 case FUNCNAME_FUNCSIG:
3272 if (current_funcsig == NULL) {
3273 const source_position_t *const src_pos = &expr->base.source_position;
3274 ir_entity *ent = get_irg_entity(current_ir_graph);
3275 const char *const name = get_entity_ld_name(ent);
3276 const string_t string = { name, strlen(name) + 1 };
3277 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3279 return current_funcsig;
3281 panic("Unsupported function name");
3284 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3286 statement_t *statement = expr->statement;
3288 assert(statement->kind == STATEMENT_COMPOUND);
3289 return compound_statement_to_firm(&statement->compound);
3292 static ir_node *va_start_expression_to_firm(
3293 const va_start_expression_t *const expr)
3295 ir_entity *param_ent = current_vararg_entity;
3296 if (param_ent == NULL) {
3297 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3298 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3299 ir_type *const param_type = get_unknown_type();
3300 param_ent = new_parameter_entity(frame_type, n, param_type);
3301 current_vararg_entity = param_ent;
3304 ir_node *const frame = get_irg_frame(current_ir_graph);
3305 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3306 ir_node *const no_mem = new_NoMem();
3307 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3309 set_value_for_expression(expr->ap, arg_sel);
3314 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3316 type_t *const type = expr->base.type;
3317 expression_t *const ap_expr = expr->ap;
3318 ir_node *const ap_addr = expression_to_addr(ap_expr);
3319 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3320 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3321 ir_node *const res = deref_address(dbgi, type, ap);
3323 ir_node *const cnst = get_type_size_node(expr->base.type);
3324 ir_mode *const mode = get_irn_mode(cnst);
3325 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3326 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3327 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3328 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3329 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3331 set_value_for_expression_addr(ap_expr, add, ap_addr);
3337 * Generate Firm for a va_copy expression.
3339 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3341 ir_node *const src = expression_to_firm(expr->src);
3342 set_value_for_expression(expr->dst, src);
3346 static ir_node *dereference_addr(const unary_expression_t *const expression)
3348 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3349 return expression_to_firm(expression->value);
3353 * Returns a IR-node representing an lvalue of the given expression.
3355 static ir_node *expression_to_addr(const expression_t *expression)
3357 switch(expression->kind) {
3358 case EXPR_ARRAY_ACCESS:
3359 return array_access_addr(&expression->array_access);
3361 return call_expression_to_firm(&expression->call);
3362 case EXPR_COMPOUND_LITERAL:
3363 return compound_literal_addr(&expression->compound_literal);
3364 case EXPR_REFERENCE:
3365 return reference_addr(&expression->reference);
3367 return select_addr(&expression->select);
3368 case EXPR_UNARY_DEREFERENCE:
3369 return dereference_addr(&expression->unary);
3373 panic("trying to get address of non-lvalue");
3376 static ir_node *builtin_constant_to_firm(
3377 const builtin_constant_expression_t *expression)
3379 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3380 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3381 return create_Const_from_bool(mode, v);
3384 static ir_node *builtin_types_compatible_to_firm(
3385 const builtin_types_compatible_expression_t *expression)
3387 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3388 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3389 bool const value = types_compatible(left, right);
3390 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3391 return create_Const_from_bool(mode, value);
3394 static ir_node *get_label_block(label_t *label)
3396 if (label->block != NULL)
3397 return label->block;
3399 /* beware: might be called from create initializer with current_ir_graph
3400 * set to const_code_irg. */
3401 ir_graph *rem = current_ir_graph;
3402 current_ir_graph = current_function;
3404 ir_node *block = new_immBlock();
3406 label->block = block;
3408 ARR_APP1(label_t *, all_labels, label);
3410 current_ir_graph = rem;
3415 * Pointer to a label. This is used for the
3416 * GNU address-of-label extension.
3418 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3420 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3421 ir_node *block = get_label_block(label->label);
3422 ir_entity *entity = create_Block_entity(block);
3424 symconst_symbol value;
3425 value.entity_p = entity;
3426 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3430 * creates firm nodes for an expression. The difference between this function
3431 * and expression_to_firm is, that this version might produce mode_b nodes
3432 * instead of mode_Is.
3434 static ir_node *_expression_to_firm(const expression_t *expression)
3437 if (!constant_folding) {
3438 assert(!expression->base.transformed);
3439 ((expression_t*) expression)->base.transformed = true;
3443 switch (expression->kind) {
3444 case EXPR_LITERAL_CASES:
3445 return literal_to_firm(&expression->literal);
3446 case EXPR_STRING_LITERAL:
3447 return string_to_firm(&expression->base.source_position, "str.%u",
3448 &expression->literal.value);
3449 case EXPR_WIDE_STRING_LITERAL:
3450 return wide_string_literal_to_firm(&expression->string_literal);
3451 case EXPR_REFERENCE:
3452 return reference_expression_to_firm(&expression->reference);
3453 case EXPR_ENUM_CONSTANT:
3454 return enum_constant_to_firm(&expression->reference);
3456 return call_expression_to_firm(&expression->call);
3457 case EXPR_UNARY_CASES:
3458 return unary_expression_to_firm(&expression->unary);
3459 case EXPR_BINARY_CASES:
3460 return binary_expression_to_firm(&expression->binary);
3461 case EXPR_ARRAY_ACCESS:
3462 return array_access_to_firm(&expression->array_access);
3464 return sizeof_to_firm(&expression->typeprop);
3466 return alignof_to_firm(&expression->typeprop);
3467 case EXPR_CONDITIONAL:
3468 return conditional_to_firm(&expression->conditional);
3470 return select_to_firm(&expression->select);
3471 case EXPR_CLASSIFY_TYPE:
3472 return classify_type_to_firm(&expression->classify_type);
3474 return function_name_to_firm(&expression->funcname);
3475 case EXPR_STATEMENT:
3476 return statement_expression_to_firm(&expression->statement);
3478 return va_start_expression_to_firm(&expression->va_starte);
3480 return va_arg_expression_to_firm(&expression->va_arge);
3482 return va_copy_expression_to_firm(&expression->va_copye);
3483 case EXPR_BUILTIN_CONSTANT_P:
3484 return builtin_constant_to_firm(&expression->builtin_constant);
3485 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3486 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3488 return offsetof_to_firm(&expression->offsetofe);
3489 case EXPR_COMPOUND_LITERAL:
3490 return compound_literal_to_firm(&expression->compound_literal);
3491 case EXPR_LABEL_ADDRESS:
3492 return label_address_to_firm(&expression->label_address);
3497 panic("invalid expression found");
3501 * Check if a given expression is a GNU __builtin_expect() call.
3503 static bool is_builtin_expect(const expression_t *expression)
3505 if (expression->kind != EXPR_CALL)
3508 expression_t *function = expression->call.function;
3509 if (function->kind != EXPR_REFERENCE)
3511 reference_expression_t *ref = &function->reference;
3512 if (ref->entity->kind != ENTITY_FUNCTION ||
3513 ref->entity->function.btk != BUILTIN_EXPECT)
3519 static bool produces_mode_b(const expression_t *expression)
3521 switch (expression->kind) {
3522 case EXPR_BINARY_EQUAL:
3523 case EXPR_BINARY_NOTEQUAL:
3524 case EXPR_BINARY_LESS:
3525 case EXPR_BINARY_LESSEQUAL:
3526 case EXPR_BINARY_GREATER:
3527 case EXPR_BINARY_GREATEREQUAL:
3528 case EXPR_BINARY_ISGREATER:
3529 case EXPR_BINARY_ISGREATEREQUAL:
3530 case EXPR_BINARY_ISLESS:
3531 case EXPR_BINARY_ISLESSEQUAL:
3532 case EXPR_BINARY_ISLESSGREATER:
3533 case EXPR_BINARY_ISUNORDERED:
3534 case EXPR_UNARY_NOT:
3538 if (is_builtin_expect(expression)) {
3539 expression_t *argument = expression->call.arguments->expression;
3540 return produces_mode_b(argument);
3543 case EXPR_BINARY_COMMA:
3544 return produces_mode_b(expression->binary.right);
3551 static ir_node *expression_to_firm(const expression_t *expression)
3553 if (!produces_mode_b(expression)) {
3554 ir_node *res = _expression_to_firm(expression);
3555 assert(res == NULL || get_irn_mode(res) != mode_b);
3559 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3560 bool const constant_folding_old = constant_folding;
3561 constant_folding = true;
3562 ir_node *res = _expression_to_firm(expression);
3563 constant_folding = constant_folding_old;
3564 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3565 assert(is_Const(res));
3566 return create_Const_from_bool(mode, !is_Const_null(res));
3569 /* we have to produce a 0/1 from the mode_b expression */
3570 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3571 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3572 return produce_condition_result(expression, mode, dbgi);
3576 * create a short-circuit expression evaluation that tries to construct
3577 * efficient control flow structures for &&, || and ! expressions
3579 static ir_node *create_condition_evaluation(const expression_t *expression,
3580 ir_node *true_block,
3581 ir_node *false_block)
3583 switch(expression->kind) {
3584 case EXPR_UNARY_NOT: {
3585 const unary_expression_t *unary_expression = &expression->unary;
3586 create_condition_evaluation(unary_expression->value, false_block,
3590 case EXPR_BINARY_LOGICAL_AND: {
3591 const binary_expression_t *binary_expression = &expression->binary;
3593 ir_node *extra_block = new_immBlock();
3594 create_condition_evaluation(binary_expression->left, extra_block,
3596 mature_immBlock(extra_block);
3597 set_cur_block(extra_block);
3598 create_condition_evaluation(binary_expression->right, true_block,
3602 case EXPR_BINARY_LOGICAL_OR: {
3603 const binary_expression_t *binary_expression = &expression->binary;
3605 ir_node *extra_block = new_immBlock();
3606 create_condition_evaluation(binary_expression->left, true_block,
3608 mature_immBlock(extra_block);
3609 set_cur_block(extra_block);
3610 create_condition_evaluation(binary_expression->right, true_block,
3618 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3619 ir_node *cond_expr = _expression_to_firm(expression);
3620 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3621 ir_node *cond = new_d_Cond(dbgi, condition);
3622 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3623 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3625 /* set branch prediction info based on __builtin_expect */
3626 if (is_builtin_expect(expression) && is_Cond(cond)) {
3627 call_argument_t *argument = expression->call.arguments->next;
3628 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3629 bool const cnst = fold_constant_to_bool(argument->expression);
3630 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3631 set_Cond_jmp_pred(cond, pred);
3635 add_immBlock_pred(true_block, true_proj);
3636 add_immBlock_pred(false_block, false_proj);
3638 set_unreachable_now();
3642 static void create_variable_entity(entity_t *variable,
3643 declaration_kind_t declaration_kind,
3644 ir_type *parent_type)
3646 assert(variable->kind == ENTITY_VARIABLE);
3647 type_t *type = skip_typeref(variable->declaration.type);
3649 ident *const id = new_id_from_str(variable->base.symbol->string);
3650 ir_type *const irtype = get_ir_type(type);
3651 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3652 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3653 unsigned alignment = variable->declaration.alignment;
3655 set_entity_alignment(irentity, alignment);
3657 handle_decl_modifiers(irentity, variable);
3659 variable->declaration.kind = (unsigned char) declaration_kind;
3660 variable->variable.v.entity = irentity;
3661 set_entity_ld_ident(irentity, create_ld_ident(variable));
3663 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3664 set_entity_volatility(irentity, volatility_is_volatile);
3669 typedef struct type_path_entry_t type_path_entry_t;
3670 struct type_path_entry_t {
3672 ir_initializer_t *initializer;
3674 entity_t *compound_entry;
3677 typedef struct type_path_t type_path_t;
3678 struct type_path_t {
3679 type_path_entry_t *path;
3684 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3686 size_t len = ARR_LEN(path->path);
3688 for (size_t i = 0; i < len; ++i) {
3689 const type_path_entry_t *entry = & path->path[i];
3691 type_t *type = skip_typeref(entry->type);
3692 if (is_type_compound(type)) {
3693 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3694 } else if (is_type_array(type)) {
3695 fprintf(stderr, "[%u]", (unsigned) entry->index);
3697 fprintf(stderr, "-INVALID-");
3700 fprintf(stderr, " (");
3701 print_type(path->top_type);
3702 fprintf(stderr, ")");
3705 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3707 size_t len = ARR_LEN(path->path);
3709 return & path->path[len-1];
3712 static type_path_entry_t *append_to_type_path(type_path_t *path)
3714 size_t len = ARR_LEN(path->path);
3715 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3717 type_path_entry_t *result = & path->path[len];
3718 memset(result, 0, sizeof(result[0]));
3722 static size_t get_compound_member_count(const compound_type_t *type)
3724 compound_t *compound = type->compound;
3725 size_t n_members = 0;
3726 entity_t *member = compound->members.entities;
3727 for ( ; member != NULL; member = member->base.next) {
3734 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3736 type_t *orig_top_type = path->top_type;
3737 type_t *top_type = skip_typeref(orig_top_type);
3739 assert(is_type_compound(top_type) || is_type_array(top_type));
3741 if (ARR_LEN(path->path) == 0) {
3744 type_path_entry_t *top = get_type_path_top(path);
3745 ir_initializer_t *initializer = top->initializer;
3746 return get_initializer_compound_value(initializer, top->index);
3750 static void descend_into_subtype(type_path_t *path)
3752 type_t *orig_top_type = path->top_type;
3753 type_t *top_type = skip_typeref(orig_top_type);
3755 assert(is_type_compound(top_type) || is_type_array(top_type));
3757 ir_initializer_t *initializer = get_initializer_entry(path);
3759 type_path_entry_t *top = append_to_type_path(path);
3760 top->type = top_type;
3764 if (is_type_compound(top_type)) {
3765 compound_t *const compound = top_type->compound.compound;
3766 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3768 top->compound_entry = entry;
3770 len = get_compound_member_count(&top_type->compound);
3771 if (entry != NULL) {
3772 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3773 path->top_type = entry->declaration.type;
3776 assert(is_type_array(top_type));
3777 assert(top_type->array.size > 0);
3780 path->top_type = top_type->array.element_type;
3781 len = top_type->array.size;
3783 if (initializer == NULL
3784 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3785 initializer = create_initializer_compound(len);
3786 /* we have to set the entry at the 2nd latest path entry... */
3787 size_t path_len = ARR_LEN(path->path);
3788 assert(path_len >= 1);
3790 type_path_entry_t *entry = & path->path[path_len-2];
3791 ir_initializer_t *tinitializer = entry->initializer;
3792 set_initializer_compound_value(tinitializer, entry->index,
3796 top->initializer = initializer;
3799 static void ascend_from_subtype(type_path_t *path)
3801 type_path_entry_t *top = get_type_path_top(path);
3803 path->top_type = top->type;
3805 size_t len = ARR_LEN(path->path);
3806 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3809 static void walk_designator(type_path_t *path, const designator_t *designator)
3811 /* designators start at current object type */
3812 ARR_RESIZE(type_path_entry_t, path->path, 1);
3814 for ( ; designator != NULL; designator = designator->next) {
3815 type_path_entry_t *top = get_type_path_top(path);
3816 type_t *orig_type = top->type;
3817 type_t *type = skip_typeref(orig_type);
3819 if (designator->symbol != NULL) {
3820 assert(is_type_compound(type));
3822 symbol_t *symbol = designator->symbol;
3824 compound_t *compound = type->compound.compound;
3825 entity_t *iter = compound->members.entities;
3826 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3827 if (iter->base.symbol == symbol) {
3828 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3832 assert(iter != NULL);
3834 /* revert previous initialisations of other union elements */
3835 if (type->kind == TYPE_COMPOUND_UNION) {
3836 ir_initializer_t *initializer = top->initializer;
3837 if (initializer != NULL
3838 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3839 /* are we writing to a new element? */
3840 ir_initializer_t *oldi
3841 = get_initializer_compound_value(initializer, index);
3842 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3843 /* clear initializer */
3845 = get_initializer_compound_n_entries(initializer);
3846 ir_initializer_t *nulli = get_initializer_null();
3847 for (size_t i = 0; i < len; ++i) {
3848 set_initializer_compound_value(initializer, i,
3855 top->type = orig_type;
3856 top->compound_entry = iter;
3858 orig_type = iter->declaration.type;
3860 expression_t *array_index = designator->array_index;
3861 assert(designator->array_index != NULL);
3862 assert(is_type_array(type));
3864 long index = fold_constant_to_int(array_index);
3867 if (type->array.size_constant) {
3868 long array_size = type->array.size;
3869 assert(index < array_size);
3873 top->type = orig_type;
3874 top->index = (size_t) index;
3875 orig_type = type->array.element_type;
3877 path->top_type = orig_type;
3879 if (designator->next != NULL) {
3880 descend_into_subtype(path);
3884 path->invalid = false;
3887 static void advance_current_object(type_path_t *path)
3889 if (path->invalid) {
3890 /* TODO: handle this... */
3891 panic("invalid initializer in ast2firm (excessive elements)");
3894 type_path_entry_t *top = get_type_path_top(path);
3896 type_t *type = skip_typeref(top->type);
3897 if (is_type_union(type)) {
3898 /* only the first element is initialized in unions */
3899 top->compound_entry = NULL;
3900 } else if (is_type_struct(type)) {
3901 entity_t *entry = top->compound_entry;
3904 entry = skip_unnamed_bitfields(entry->base.next);
3905 top->compound_entry = entry;
3906 if (entry != NULL) {
3907 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3908 path->top_type = entry->declaration.type;
3912 assert(is_type_array(type));
3915 if (!type->array.size_constant || top->index < type->array.size) {
3920 /* we're past the last member of the current sub-aggregate, try if we
3921 * can ascend in the type hierarchy and continue with another subobject */
3922 size_t len = ARR_LEN(path->path);
3925 ascend_from_subtype(path);
3926 advance_current_object(path);
3928 path->invalid = true;
3933 static ir_initializer_t *create_ir_initializer_value(
3934 const initializer_value_t *initializer)
3936 if (is_type_compound(initializer->value->base.type)) {
3937 panic("initializer creation for compounds not implemented yet");
3939 type_t *type = initializer->value->base.type;
3940 expression_t *expr = initializer->value;
3941 ir_node *value = expression_to_firm(expr);
3942 ir_mode *mode = get_ir_mode_storage(type);
3943 value = create_conv(NULL, value, mode);
3944 return create_initializer_const(value);
3947 /** test wether type can be initialized by a string constant */
3948 static bool is_string_type(type_t *type)
3951 if (is_type_pointer(type)) {
3952 inner = skip_typeref(type->pointer.points_to);
3953 } else if(is_type_array(type)) {
3954 inner = skip_typeref(type->array.element_type);
3959 return is_type_integer(inner);
3962 static ir_initializer_t *create_ir_initializer_list(
3963 const initializer_list_t *initializer, type_t *type)
3966 memset(&path, 0, sizeof(path));
3967 path.top_type = type;
3968 path.path = NEW_ARR_F(type_path_entry_t, 0);
3970 descend_into_subtype(&path);
3972 for (size_t i = 0; i < initializer->len; ++i) {
3973 const initializer_t *sub_initializer = initializer->initializers[i];
3975 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3976 walk_designator(&path, sub_initializer->designator.designator);
3980 if (sub_initializer->kind == INITIALIZER_VALUE) {
3981 /* we might have to descend into types until we're at a scalar
3984 type_t *orig_top_type = path.top_type;
3985 type_t *top_type = skip_typeref(orig_top_type);
3987 if (is_type_scalar(top_type))
3989 descend_into_subtype(&path);
3991 } else if (sub_initializer->kind == INITIALIZER_STRING
3992 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3993 /* we might have to descend into types until we're at a scalar
3996 type_t *orig_top_type = path.top_type;
3997 type_t *top_type = skip_typeref(orig_top_type);
3999 if (is_string_type(top_type))
4001 descend_into_subtype(&path);
4005 ir_initializer_t *sub_irinitializer
4006 = create_ir_initializer(sub_initializer, path.top_type);
4008 size_t path_len = ARR_LEN(path.path);
4009 assert(path_len >= 1);
4010 type_path_entry_t *entry = & path.path[path_len-1];
4011 ir_initializer_t *tinitializer = entry->initializer;
4012 set_initializer_compound_value(tinitializer, entry->index,
4015 advance_current_object(&path);
4018 assert(ARR_LEN(path.path) >= 1);
4019 ir_initializer_t *result = path.path[0].initializer;
4020 DEL_ARR_F(path.path);
4025 static ir_initializer_t *create_ir_initializer_string(
4026 const initializer_string_t *initializer, type_t *type)
4028 type = skip_typeref(type);
4030 size_t string_len = initializer->string.size;
4031 assert(type->kind == TYPE_ARRAY);
4032 assert(type->array.size_constant);
4033 size_t len = type->array.size;
4034 ir_initializer_t *irinitializer = create_initializer_compound(len);
4036 const char *string = initializer->string.begin;
4037 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
4039 for (size_t i = 0; i < len; ++i) {
4044 ir_tarval *tv = new_tarval_from_long(c, mode);
4045 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4047 set_initializer_compound_value(irinitializer, i, char_initializer);
4050 return irinitializer;
4053 static ir_initializer_t *create_ir_initializer_wide_string(
4054 const initializer_wide_string_t *initializer, type_t *type)
4056 assert(type->kind == TYPE_ARRAY);
4057 assert(type->array.size_constant);
4058 size_t len = type->array.size;
4059 size_t string_len = wstrlen(&initializer->string);
4060 ir_initializer_t *irinitializer = create_initializer_compound(len);
4062 const char *p = initializer->string.begin;
4063 ir_mode *mode = get_type_mode(ir_type_wchar_t);
4065 for (size_t i = 0; i < len; ++i) {
4067 if (i < string_len) {
4068 c = read_utf8_char(&p);
4070 ir_tarval *tv = new_tarval_from_long(c, mode);
4071 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4073 set_initializer_compound_value(irinitializer, i, char_initializer);
4076 return irinitializer;
4079 static ir_initializer_t *create_ir_initializer(
4080 const initializer_t *initializer, type_t *type)
4082 switch(initializer->kind) {
4083 case INITIALIZER_STRING:
4084 return create_ir_initializer_string(&initializer->string, type);
4086 case INITIALIZER_WIDE_STRING:
4087 return create_ir_initializer_wide_string(&initializer->wide_string,
4090 case INITIALIZER_LIST:
4091 return create_ir_initializer_list(&initializer->list, type);
4093 case INITIALIZER_VALUE:
4094 return create_ir_initializer_value(&initializer->value);
4096 case INITIALIZER_DESIGNATOR:
4097 panic("unexpected designator initializer found");
4099 panic("unknown initializer");
4102 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4103 * are elements [...] the remainder of the aggregate shall be initialized
4104 * implicitly the same as objects that have static storage duration. */
4105 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4108 /* for unions we must NOT do anything for null initializers */
4109 ir_type *owner = get_entity_owner(entity);
4110 if (is_Union_type(owner)) {
4114 ir_type *ent_type = get_entity_type(entity);
4115 /* create sub-initializers for a compound type */
4116 if (is_compound_type(ent_type)) {
4117 unsigned n_members = get_compound_n_members(ent_type);
4118 for (unsigned n = 0; n < n_members; ++n) {
4119 ir_entity *member = get_compound_member(ent_type, n);
4120 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4122 create_dynamic_null_initializer(member, dbgi, addr);
4126 if (is_Array_type(ent_type)) {
4127 assert(has_array_upper_bound(ent_type, 0));
4128 long n = get_array_upper_bound_int(ent_type, 0);
4129 for (long i = 0; i < n; ++i) {
4130 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4131 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4132 ir_node *cnst = new_d_Const(dbgi, index_tv);
4133 ir_node *in[1] = { cnst };
4134 ir_entity *arrent = get_array_element_entity(ent_type);
4135 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4137 create_dynamic_null_initializer(arrent, dbgi, addr);
4142 ir_mode *value_mode = get_type_mode(ent_type);
4143 ir_node *node = new_Const(get_mode_null(value_mode));
4145 /* is it a bitfield type? */
4146 if (is_Primitive_type(ent_type) &&
4147 get_primitive_base_type(ent_type) != NULL) {
4148 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4152 ir_node *mem = get_store();
4153 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4154 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4158 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4159 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4161 switch(get_initializer_kind(initializer)) {
4162 case IR_INITIALIZER_NULL:
4163 create_dynamic_null_initializer(entity, dbgi, base_addr);
4165 case IR_INITIALIZER_CONST: {
4166 ir_node *node = get_initializer_const_value(initializer);
4167 ir_type *ent_type = get_entity_type(entity);
4169 /* is it a bitfield type? */
4170 if (is_Primitive_type(ent_type) &&
4171 get_primitive_base_type(ent_type) != NULL) {
4172 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4176 assert(get_type_mode(type) == get_irn_mode(node));
4177 ir_node *mem = get_store();
4178 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4179 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4183 case IR_INITIALIZER_TARVAL: {
4184 ir_tarval *tv = get_initializer_tarval_value(initializer);
4185 ir_node *cnst = new_d_Const(dbgi, tv);
4186 ir_type *ent_type = get_entity_type(entity);
4188 /* is it a bitfield type? */
4189 if (is_Primitive_type(ent_type) &&
4190 get_primitive_base_type(ent_type) != NULL) {
4191 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4195 assert(get_type_mode(type) == get_tarval_mode(tv));
4196 ir_node *mem = get_store();
4197 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4198 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4202 case IR_INITIALIZER_COMPOUND: {
4203 assert(is_compound_type(type) || is_Array_type(type));
4205 if (is_Array_type(type)) {
4206 assert(has_array_upper_bound(type, 0));
4207 n_members = get_array_upper_bound_int(type, 0);
4209 n_members = get_compound_n_members(type);
4212 if (get_initializer_compound_n_entries(initializer)
4213 != (unsigned) n_members)
4214 panic("initializer doesn't match compound type");
4216 for (int i = 0; i < n_members; ++i) {
4219 ir_entity *sub_entity;
4220 if (is_Array_type(type)) {
4221 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4222 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4223 ir_node *cnst = new_d_Const(dbgi, index_tv);
4224 ir_node *in[1] = { cnst };
4225 irtype = get_array_element_type(type);
4226 sub_entity = get_array_element_entity(type);
4227 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4230 sub_entity = get_compound_member(type, i);
4231 irtype = get_entity_type(sub_entity);
4232 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4236 ir_initializer_t *sub_init
4237 = get_initializer_compound_value(initializer, i);
4239 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4246 panic("invalid IR_INITIALIZER found");
4249 static void create_dynamic_initializer(ir_initializer_t *initializer,
4250 dbg_info *dbgi, ir_entity *entity)
4252 ir_node *frame = get_irg_frame(current_ir_graph);
4253 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4254 ir_type *type = get_entity_type(entity);
4256 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4259 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4260 ir_entity *entity, type_t *type)
4262 ir_node *memory = get_store();
4263 ir_node *nomem = new_NoMem();
4264 ir_node *frame = get_irg_frame(current_ir_graph);
4265 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4267 if (initializer->kind == INITIALIZER_VALUE) {
4268 initializer_value_t *initializer_value = &initializer->value;
4270 ir_node *value = expression_to_firm(initializer_value->value);
4271 type = skip_typeref(type);
4272 assign_value(dbgi, addr, type, value);
4276 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4277 ir_initializer_t *irinitializer
4278 = create_ir_initializer(initializer, type);
4280 create_dynamic_initializer(irinitializer, dbgi, entity);
4284 /* create a "template" entity which is copied to the entity on the stack */
4285 ir_entity *const init_entity
4286 = create_initializer_entity(dbgi, initializer, type);
4287 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4288 ir_type *const irtype = get_ir_type(type);
4289 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4291 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4292 set_store(copyb_mem);
4295 static void create_initializer_local_variable_entity(entity_t *entity)
4297 assert(entity->kind == ENTITY_VARIABLE);
4298 initializer_t *initializer = entity->variable.initializer;
4299 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4300 ir_entity *irentity = entity->variable.v.entity;
4301 type_t *type = entity->declaration.type;
4303 create_local_initializer(initializer, dbgi, irentity, type);
4306 static void create_variable_initializer(entity_t *entity)
4308 assert(entity->kind == ENTITY_VARIABLE);
4309 initializer_t *initializer = entity->variable.initializer;
4310 if (initializer == NULL)
4313 declaration_kind_t declaration_kind
4314 = (declaration_kind_t) entity->declaration.kind;
4315 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4316 create_initializer_local_variable_entity(entity);
4320 type_t *type = entity->declaration.type;
4321 type_qualifiers_t tq = get_type_qualifier(type, true);
4323 if (initializer->kind == INITIALIZER_VALUE) {
4324 initializer_value_t *initializer_value = &initializer->value;
4325 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4326 expression_t *value = initializer_value->value;
4327 type_t *init_type = value->base.type;
4328 type_t *skipped = skip_typeref(init_type);
4330 if (!is_type_scalar(skipped)) {
4332 while (value->kind == EXPR_UNARY_CAST)
4333 value = value->unary.value;
4335 if (value->kind != EXPR_COMPOUND_LITERAL)
4336 panic("expected non-scalar initializer to be a compound literal");
4337 initializer = value->compound_literal.initializer;
4338 goto have_initializer;
4341 ir_node *node = expression_to_firm(initializer_value->value);
4343 ir_mode *mode = get_ir_mode_storage(init_type);
4344 node = create_conv(dbgi, node, mode);
4345 node = do_strict_conv(dbgi, node);
4347 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4348 set_value(entity->variable.v.value_number, node);
4350 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4352 ir_entity *irentity = entity->variable.v.entity;
4354 if (tq & TYPE_QUALIFIER_CONST
4355 && get_entity_owner(irentity) != get_tls_type()) {
4356 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4358 set_atomic_ent_value(irentity, node);
4362 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4363 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4365 ir_entity *irentity = entity->variable.v.entity;
4366 ir_initializer_t *irinitializer
4367 = create_ir_initializer(initializer, type);
4369 if (tq & TYPE_QUALIFIER_CONST) {
4370 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4372 set_entity_initializer(irentity, irinitializer);
4376 static void create_variable_length_array(entity_t *entity)
4378 assert(entity->kind == ENTITY_VARIABLE);
4379 assert(entity->variable.initializer == NULL);
4381 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4382 entity->variable.v.vla_base = NULL;
4384 /* TODO: record VLA somewhere so we create the free node when we leave
4388 static void allocate_variable_length_array(entity_t *entity)
4390 assert(entity->kind == ENTITY_VARIABLE);
4391 assert(entity->variable.initializer == NULL);
4392 assert(currently_reachable());
4394 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4395 type_t *type = entity->declaration.type;
4396 ir_type *el_type = get_ir_type(type->array.element_type);
4398 /* make sure size_node is calculated */
4399 get_type_size_node(type);
4400 ir_node *elems = type->array.size_node;
4401 ir_node *mem = get_store();
4402 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4404 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4405 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4408 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4409 entity->variable.v.vla_base = addr;
4413 * Creates a Firm local variable from a declaration.
4415 static void create_local_variable(entity_t *entity)
4417 assert(entity->kind == ENTITY_VARIABLE);
4418 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4420 bool needs_entity = entity->variable.address_taken;
4421 type_t *type = skip_typeref(entity->declaration.type);
4423 /* is it a variable length array? */
4424 if (is_type_array(type) && !type->array.size_constant) {
4425 create_variable_length_array(entity);
4427 } else if (is_type_array(type) || is_type_compound(type)) {
4428 needs_entity = true;
4429 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4430 needs_entity = true;
4434 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4435 create_variable_entity(entity,
4436 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4439 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4440 entity->variable.v.value_number = next_value_number_function;
4441 set_irg_loc_description(current_ir_graph, next_value_number_function,
4443 ++next_value_number_function;
4447 static void create_local_static_variable(entity_t *entity)
4449 assert(entity->kind == ENTITY_VARIABLE);
4450 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4452 type_t *type = skip_typeref(entity->declaration.type);
4453 ir_type *const var_type = entity->variable.thread_local ?
4454 get_tls_type() : get_glob_type();
4455 ir_type *const irtype = get_ir_type(type);
4456 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4458 size_t l = strlen(entity->base.symbol->string);
4459 char buf[l + sizeof(".%u")];
4460 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4461 ident *const id = id_unique(buf);
4462 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4464 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4465 set_entity_volatility(irentity, volatility_is_volatile);
4468 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4469 entity->variable.v.entity = irentity;
4471 set_entity_ld_ident(irentity, id);
4472 set_entity_visibility(irentity, ir_visibility_local);
4474 ir_graph *const old_current_ir_graph = current_ir_graph;
4475 current_ir_graph = get_const_code_irg();
4477 create_variable_initializer(entity);
4479 assert(current_ir_graph == get_const_code_irg());
4480 current_ir_graph = old_current_ir_graph;
4485 static void return_statement_to_firm(return_statement_t *statement)
4487 if (!currently_reachable())
4490 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4491 type_t *type = current_function_entity->declaration.type;
4492 ir_type *func_irtype = get_ir_type(type);
4496 if (get_method_n_ress(func_irtype) > 0) {
4497 ir_type *res_type = get_method_res_type(func_irtype, 0);
4499 if (statement->value != NULL) {
4500 ir_node *node = expression_to_firm(statement->value);
4501 if (!is_compound_type(res_type)) {
4502 type_t *ret_value_type = statement->value->base.type;
4503 ir_mode *mode = get_ir_mode_storage(ret_value_type);
4504 node = create_conv(dbgi, node, mode);
4505 node = do_strict_conv(dbgi, node);
4510 if (is_compound_type(res_type)) {
4513 mode = get_type_mode(res_type);
4515 in[0] = new_Unknown(mode);
4519 /* build return_value for its side effects */
4520 if (statement->value != NULL) {
4521 expression_to_firm(statement->value);
4526 ir_node *store = get_store();
4527 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4529 ir_node *end_block = get_irg_end_block(current_ir_graph);
4530 add_immBlock_pred(end_block, ret);
4532 set_unreachable_now();
4535 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4537 if (!currently_reachable())
4540 return expression_to_firm(statement->expression);
4543 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4545 entity_t *entity = compound->scope.entities;
4546 for ( ; entity != NULL; entity = entity->base.next) {
4547 if (!is_declaration(entity))
4550 create_local_declaration(entity);
4553 ir_node *result = NULL;
4554 statement_t *statement = compound->statements;
4555 for ( ; statement != NULL; statement = statement->base.next) {
4556 if (statement->base.next == NULL
4557 && statement->kind == STATEMENT_EXPRESSION) {
4558 result = expression_statement_to_firm(
4559 &statement->expression);
4562 statement_to_firm(statement);
4568 static void create_global_variable(entity_t *entity)
4570 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4571 ir_visibility visibility = ir_visibility_default;
4572 ir_entity *irentity;
4573 assert(entity->kind == ENTITY_VARIABLE);
4575 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4576 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4577 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4578 case STORAGE_CLASS_NONE:
4579 visibility = ir_visibility_default;
4580 /* uninitialized globals get merged in C */
4581 if (entity->variable.initializer == NULL)
4582 linkage |= IR_LINKAGE_MERGE;
4584 case STORAGE_CLASS_TYPEDEF:
4585 case STORAGE_CLASS_AUTO:
4586 case STORAGE_CLASS_REGISTER:
4587 panic("invalid storage class for global var");
4590 ir_type *var_type = get_glob_type();
4591 if (entity->variable.thread_local) {
4592 var_type = get_tls_type();
4593 /* LINKAGE_MERGE not supported by current linkers */
4594 linkage &= ~IR_LINKAGE_MERGE;
4596 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4597 irentity = entity->variable.v.entity;
4598 add_entity_linkage(irentity, linkage);
4599 set_entity_visibility(irentity, visibility);
4602 static void create_local_declaration(entity_t *entity)
4604 assert(is_declaration(entity));
4606 /* construct type */
4607 (void) get_ir_type(entity->declaration.type);
4608 if (entity->base.symbol == NULL) {
4612 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4613 case STORAGE_CLASS_STATIC:
4614 if (entity->kind == ENTITY_FUNCTION) {
4615 (void)get_function_entity(entity, NULL);
4617 create_local_static_variable(entity);
4620 case STORAGE_CLASS_EXTERN:
4621 if (entity->kind == ENTITY_FUNCTION) {
4622 assert(entity->function.statement == NULL);
4623 (void)get_function_entity(entity, NULL);
4625 create_global_variable(entity);
4626 create_variable_initializer(entity);
4629 case STORAGE_CLASS_NONE:
4630 case STORAGE_CLASS_AUTO:
4631 case STORAGE_CLASS_REGISTER:
4632 if (entity->kind == ENTITY_FUNCTION) {
4633 if (entity->function.statement != NULL) {
4634 ir_type *owner = get_irg_frame_type(current_ir_graph);
4635 (void)get_function_entity(entity, owner);
4636 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4637 enqueue_inner_function(entity);
4639 (void)get_function_entity(entity, NULL);
4642 create_local_variable(entity);
4645 case STORAGE_CLASS_TYPEDEF:
4648 panic("invalid storage class found");
4651 static void initialize_local_declaration(entity_t *entity)
4653 if (entity->base.symbol == NULL)
4656 // no need to emit code in dead blocks
4657 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4658 && !currently_reachable())
4661 switch ((declaration_kind_t) entity->declaration.kind) {
4662 case DECLARATION_KIND_LOCAL_VARIABLE:
4663 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4664 create_variable_initializer(entity);
4667 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4668 allocate_variable_length_array(entity);
4671 case DECLARATION_KIND_COMPOUND_MEMBER:
4672 case DECLARATION_KIND_GLOBAL_VARIABLE:
4673 case DECLARATION_KIND_FUNCTION:
4674 case DECLARATION_KIND_INNER_FUNCTION:
4677 case DECLARATION_KIND_PARAMETER:
4678 case DECLARATION_KIND_PARAMETER_ENTITY:
4679 panic("can't initialize parameters");
4681 case DECLARATION_KIND_UNKNOWN:
4682 panic("can't initialize unknown declaration");
4684 panic("invalid declaration kind");
4687 static void declaration_statement_to_firm(declaration_statement_t *statement)
4689 entity_t *entity = statement->declarations_begin;
4693 entity_t *const last = statement->declarations_end;
4694 for ( ;; entity = entity->base.next) {
4695 if (is_declaration(entity)) {
4696 initialize_local_declaration(entity);
4697 } else if (entity->kind == ENTITY_TYPEDEF) {
4698 /* ยง6.7.7:3 Any array size expressions associated with variable length
4699 * array declarators are evaluated each time the declaration of the
4700 * typedef name is reached in the order of execution. */
4701 type_t *const type = skip_typeref(entity->typedefe.type);
4702 if (is_type_array(type) && type->array.is_vla)
4703 get_vla_size(&type->array);
4710 static void if_statement_to_firm(if_statement_t *statement)
4712 /* Create the condition. */
4713 ir_node *true_block = NULL;
4714 ir_node *false_block = NULL;
4715 if (currently_reachable()) {
4716 true_block = new_immBlock();
4717 false_block = new_immBlock();
4718 create_condition_evaluation(statement->condition, true_block, false_block);
4719 mature_immBlock(true_block);
4720 mature_immBlock(false_block);
4723 /* Create the true statement. */
4724 set_cur_block(true_block);
4725 statement_to_firm(statement->true_statement);
4726 ir_node *fallthrough_block = get_cur_block();
4728 /* Create the false statement. */
4729 set_cur_block(false_block);
4730 if (statement->false_statement != NULL) {
4731 statement_to_firm(statement->false_statement);
4734 /* Handle the block after the if-statement. Minor simplification and
4735 * optimisation: Reuse the false/true block as fallthrough block, if the
4736 * true/false statement does not pass control to the fallthrough block, e.g.
4737 * in the typical if (x) return; pattern. */
4738 if (fallthrough_block) {
4739 if (currently_reachable()) {
4740 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4741 ir_node *const f_jump = new_Jmp();
4742 ir_node *const in[] = { t_jump, f_jump };
4743 fallthrough_block = new_Block(2, in);
4745 set_cur_block(fallthrough_block);
4749 /* Create a jump node which jumps into target_block, if the current block is
4751 static void jump_if_reachable(ir_node *const target_block)
4753 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4754 add_immBlock_pred(target_block, pred);
4757 static void while_statement_to_firm(while_statement_t *statement)
4759 /* Create the header block */
4760 ir_node *const header_block = new_immBlock();
4761 jump_if_reachable(header_block);
4763 /* Create the condition. */
4764 ir_node * body_block;
4765 ir_node * false_block;
4766 expression_t *const cond = statement->condition;
4767 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4768 fold_constant_to_bool(cond)) {
4769 /* Shortcut for while (true). */
4770 body_block = header_block;
4773 keep_alive(header_block);
4774 keep_all_memory(header_block);
4776 body_block = new_immBlock();
4777 false_block = new_immBlock();
4779 set_cur_block(header_block);
4780 create_condition_evaluation(cond, body_block, false_block);
4781 mature_immBlock(body_block);
4784 ir_node *const old_continue_label = continue_label;
4785 ir_node *const old_break_label = break_label;
4786 continue_label = header_block;
4787 break_label = false_block;
4789 /* Create the loop body. */
4790 set_cur_block(body_block);
4791 statement_to_firm(statement->body);
4792 jump_if_reachable(header_block);
4794 mature_immBlock(header_block);
4795 assert(false_block == NULL || false_block == break_label);
4796 false_block = break_label;
4797 if (false_block != NULL) {
4798 mature_immBlock(false_block);
4800 set_cur_block(false_block);
4802 assert(continue_label == header_block);
4803 continue_label = old_continue_label;
4804 break_label = old_break_label;
4807 static ir_node *get_break_label(void)
4809 if (break_label == NULL) {
4810 break_label = new_immBlock();
4815 static void do_while_statement_to_firm(do_while_statement_t *statement)
4817 /* create the header block */
4818 ir_node *header_block = new_immBlock();
4821 ir_node *body_block = new_immBlock();
4822 jump_if_reachable(body_block);
4824 ir_node *old_continue_label = continue_label;
4825 ir_node *old_break_label = break_label;
4826 continue_label = header_block;
4829 set_cur_block(body_block);
4830 statement_to_firm(statement->body);
4831 ir_node *const false_block = get_break_label();
4833 assert(continue_label == header_block);
4834 continue_label = old_continue_label;
4835 break_label = old_break_label;
4837 jump_if_reachable(header_block);
4839 /* create the condition */
4840 mature_immBlock(header_block);
4841 set_cur_block(header_block);
4843 create_condition_evaluation(statement->condition, body_block, false_block);
4844 mature_immBlock(body_block);
4845 mature_immBlock(false_block);
4847 set_cur_block(false_block);
4850 static void for_statement_to_firm(for_statement_t *statement)
4852 /* create declarations */
4853 entity_t *entity = statement->scope.entities;
4854 for ( ; entity != NULL; entity = entity->base.next) {
4855 if (!is_declaration(entity))
4858 create_local_declaration(entity);
4861 if (currently_reachable()) {
4862 entity = statement->scope.entities;
4863 for ( ; entity != NULL; entity = entity->base.next) {
4864 if (!is_declaration(entity))
4867 initialize_local_declaration(entity);
4870 if (statement->initialisation != NULL) {
4871 expression_to_firm(statement->initialisation);
4875 /* Create the header block */
4876 ir_node *const header_block = new_immBlock();
4877 jump_if_reachable(header_block);
4879 /* Create the condition. */
4880 ir_node *body_block;
4881 ir_node *false_block;
4882 if (statement->condition != NULL) {
4883 body_block = new_immBlock();
4884 false_block = new_immBlock();
4886 set_cur_block(header_block);
4887 create_condition_evaluation(statement->condition, body_block, false_block);
4888 mature_immBlock(body_block);
4891 body_block = header_block;
4894 keep_alive(header_block);
4895 keep_all_memory(header_block);
4898 /* Create the step block, if necessary. */
4899 ir_node * step_block = header_block;
4900 expression_t *const step = statement->step;
4902 step_block = new_immBlock();
4905 ir_node *const old_continue_label = continue_label;
4906 ir_node *const old_break_label = break_label;
4907 continue_label = step_block;
4908 break_label = false_block;
4910 /* Create the loop body. */
4911 set_cur_block(body_block);
4912 statement_to_firm(statement->body);
4913 jump_if_reachable(step_block);
4915 /* Create the step code. */
4917 mature_immBlock(step_block);
4918 set_cur_block(step_block);
4919 expression_to_firm(step);
4920 jump_if_reachable(header_block);
4923 mature_immBlock(header_block);
4924 assert(false_block == NULL || false_block == break_label);
4925 false_block = break_label;
4926 if (false_block != NULL) {
4927 mature_immBlock(false_block);
4929 set_cur_block(false_block);
4931 assert(continue_label == step_block);
4932 continue_label = old_continue_label;
4933 break_label = old_break_label;
4936 static void create_jump_statement(const statement_t *statement,
4937 ir_node *target_block)
4939 if (!currently_reachable())
4942 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4943 ir_node *jump = new_d_Jmp(dbgi);
4944 add_immBlock_pred(target_block, jump);
4946 set_unreachable_now();
4949 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4951 /* determine number of cases */
4953 for (case_label_statement_t *l = statement->first_case; l != NULL;
4956 if (l->expression == NULL)
4958 if (l->is_empty_range)
4963 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4965 for (case_label_statement_t *l = statement->first_case; l != NULL;
4967 if (l->expression == NULL) {
4968 l->pn = pn_Switch_default;
4971 if (l->is_empty_range)
4973 ir_tarval *min = fold_constant_to_tarval(l->expression);
4974 ir_tarval *max = min;
4975 long pn = (long) i+1;
4976 if (l->end_range != NULL)
4977 max = fold_constant_to_tarval(l->end_range);
4978 ir_switch_table_set(res, i++, min, max, pn);
4984 static void switch_statement_to_firm(switch_statement_t *statement)
4986 ir_node *first_block = NULL;
4987 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4988 ir_node *switch_node = NULL;
4990 if (currently_reachable()) {
4991 ir_node *expression = expression_to_firm(statement->expression);
4992 ir_switch_table *table = create_switch_table(statement);
4993 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4995 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4996 first_block = get_cur_block();
4999 set_unreachable_now();
5001 ir_node *const old_switch = current_switch;
5002 ir_node *const old_break_label = break_label;
5003 const bool old_saw_default_label = saw_default_label;
5004 saw_default_label = false;
5005 current_switch = switch_node;
5008 statement_to_firm(statement->body);
5010 jump_if_reachable(get_break_label());
5012 if (!saw_default_label && first_block != NULL) {
5013 set_cur_block(first_block);
5014 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5015 add_immBlock_pred(get_break_label(), proj);
5018 if (break_label != NULL) {
5019 mature_immBlock(break_label);
5021 set_cur_block(break_label);
5023 assert(current_switch == switch_node);
5024 current_switch = old_switch;
5025 break_label = old_break_label;
5026 saw_default_label = old_saw_default_label;
5029 static void case_label_to_firm(const case_label_statement_t *statement)
5031 if (statement->is_empty_range)
5034 if (current_switch != NULL) {
5035 ir_node *block = new_immBlock();
5036 /* Fallthrough from previous case */
5037 jump_if_reachable(block);
5039 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5040 add_immBlock_pred(block, proj);
5041 if (statement->expression == NULL)
5042 saw_default_label = true;
5044 mature_immBlock(block);
5045 set_cur_block(block);
5048 statement_to_firm(statement->statement);
5051 static void label_to_firm(const label_statement_t *statement)
5053 ir_node *block = get_label_block(statement->label);
5054 jump_if_reachable(block);
5056 set_cur_block(block);
5058 keep_all_memory(block);
5060 statement_to_firm(statement->statement);
5063 static void computed_goto_to_firm(computed_goto_statement_t const *const statement)
5065 if (!currently_reachable())
5068 ir_node *const irn = expression_to_firm(statement->expression);
5069 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5070 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
5072 set_irn_link(ijmp, ijmp_list);
5075 set_unreachable_now();
5078 static void asm_statement_to_firm(const asm_statement_t *statement)
5080 bool needs_memory = false;
5082 if (statement->is_volatile) {
5083 needs_memory = true;
5086 size_t n_clobbers = 0;
5087 asm_clobber_t *clobber = statement->clobbers;
5088 for ( ; clobber != NULL; clobber = clobber->next) {
5089 const char *clobber_str = clobber->clobber.begin;
5091 if (!be_is_valid_clobber(clobber_str)) {
5092 errorf(&statement->base.source_position,
5093 "invalid clobber '%s' specified", clobber->clobber);
5097 if (streq(clobber_str, "memory")) {
5098 needs_memory = true;
5102 ident *id = new_id_from_str(clobber_str);
5103 obstack_ptr_grow(&asm_obst, id);
5106 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5107 ident **clobbers = NULL;
5108 if (n_clobbers > 0) {
5109 clobbers = obstack_finish(&asm_obst);
5112 size_t n_inputs = 0;
5113 asm_argument_t *argument = statement->inputs;
5114 for ( ; argument != NULL; argument = argument->next)
5116 size_t n_outputs = 0;
5117 argument = statement->outputs;
5118 for ( ; argument != NULL; argument = argument->next)
5121 unsigned next_pos = 0;
5123 ir_node *ins[n_inputs + n_outputs + 1];
5126 ir_asm_constraint tmp_in_constraints[n_outputs];
5128 const expression_t *out_exprs[n_outputs];
5129 ir_node *out_addrs[n_outputs];
5130 size_t out_size = 0;
5132 argument = statement->outputs;
5133 for ( ; argument != NULL; argument = argument->next) {
5134 const char *constraints = argument->constraints.begin;
5135 asm_constraint_flags_t asm_flags
5136 = be_parse_asm_constraints(constraints);
5139 source_position_t const *const pos = &statement->base.source_position;
5140 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5141 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5143 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5144 errorf(pos, "some constraints in '%s' are invalid", constraints);
5147 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5148 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5153 unsigned pos = next_pos++;
5154 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5155 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5156 expression_t *expr = argument->expression;
5157 ir_node *addr = expression_to_addr(expr);
5158 /* in+output, construct an artifical same_as constraint on the
5160 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5162 ir_node *value = get_value_from_lvalue(expr, addr);
5164 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5166 ir_asm_constraint constraint;
5167 constraint.pos = pos;
5168 constraint.constraint = new_id_from_str(buf);
5169 constraint.mode = get_ir_mode_storage(expr->base.type);
5170 tmp_in_constraints[in_size] = constraint;
5171 ins[in_size] = value;
5176 out_exprs[out_size] = expr;
5177 out_addrs[out_size] = addr;
5179 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5180 /* pure memory ops need no input (but we have to make sure we
5181 * attach to the memory) */
5182 assert(! (asm_flags &
5183 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5184 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5185 needs_memory = true;
5187 /* we need to attach the address to the inputs */
5188 expression_t *expr = argument->expression;
5190 ir_asm_constraint constraint;
5191 constraint.pos = pos;
5192 constraint.constraint = new_id_from_str(constraints);
5193 constraint.mode = mode_M;
5194 tmp_in_constraints[in_size] = constraint;
5196 ins[in_size] = expression_to_addr(expr);
5200 errorf(&statement->base.source_position,
5201 "only modifiers but no place set in constraints '%s'",
5206 ir_asm_constraint constraint;
5207 constraint.pos = pos;
5208 constraint.constraint = new_id_from_str(constraints);
5209 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5211 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5213 assert(obstack_object_size(&asm_obst)
5214 == out_size * sizeof(ir_asm_constraint));
5215 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5218 obstack_grow(&asm_obst, tmp_in_constraints,
5219 in_size * sizeof(tmp_in_constraints[0]));
5220 /* find and count input and output arguments */
5221 argument = statement->inputs;
5222 for ( ; argument != NULL; argument = argument->next) {
5223 const char *constraints = argument->constraints.begin;
5224 asm_constraint_flags_t asm_flags
5225 = be_parse_asm_constraints(constraints);
5227 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5228 errorf(&statement->base.source_position,
5229 "some constraints in '%s' are not supported", constraints);
5232 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5233 errorf(&statement->base.source_position,
5234 "some constraints in '%s' are invalid", constraints);
5237 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5238 errorf(&statement->base.source_position,
5239 "write flag specified for input constraints '%s'",
5245 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5246 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5247 /* we can treat this as "normal" input */
5248 input = expression_to_firm(argument->expression);
5249 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5250 /* pure memory ops need no input (but we have to make sure we
5251 * attach to the memory) */
5252 assert(! (asm_flags &
5253 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5254 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5255 needs_memory = true;
5256 input = expression_to_addr(argument->expression);
5258 errorf(&statement->base.source_position,
5259 "only modifiers but no place set in constraints '%s'",
5264 ir_asm_constraint constraint;
5265 constraint.pos = next_pos++;
5266 constraint.constraint = new_id_from_str(constraints);
5267 constraint.mode = get_irn_mode(input);
5269 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5270 ins[in_size++] = input;
5274 ir_asm_constraint constraint;
5275 constraint.pos = next_pos++;
5276 constraint.constraint = new_id_from_str("");
5277 constraint.mode = mode_M;
5279 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5280 ins[in_size++] = get_store();
5283 assert(obstack_object_size(&asm_obst)
5284 == in_size * sizeof(ir_asm_constraint));
5285 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5287 /* create asm node */
5288 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5290 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5292 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5293 out_size, output_constraints,
5294 n_clobbers, clobbers, asm_text);
5296 if (statement->is_volatile) {
5297 set_irn_pinned(node, op_pin_state_pinned);
5299 set_irn_pinned(node, op_pin_state_floats);
5302 /* create output projs & connect them */
5304 ir_node *projm = new_Proj(node, mode_M, out_size);
5309 for (i = 0; i < out_size; ++i) {
5310 const expression_t *out_expr = out_exprs[i];
5312 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5313 ir_node *proj = new_Proj(node, mode, pn);
5314 ir_node *addr = out_addrs[i];
5316 set_value_for_expression_addr(out_expr, proj, addr);
5320 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5322 statement_to_firm(statement->try_statement);
5323 source_position_t const *const pos = &statement->base.source_position;
5324 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5327 static void leave_statement_to_firm(leave_statement_t *statement)
5329 errorf(&statement->base.source_position, "__leave not supported yet");
5333 * Transform a statement.
5335 static void statement_to_firm(statement_t *const stmt)
5338 assert(!stmt->base.transformed);
5339 stmt->base.transformed = true;
5342 switch (stmt->kind) {
5343 case STATEMENT_ASM: asm_statement_to_firm( &stmt->asms); return;
5344 case STATEMENT_CASE_LABEL: case_label_to_firm( &stmt->case_label); return;
5345 case STATEMENT_COMPOUND: compound_statement_to_firm( &stmt->compound); return;
5346 case STATEMENT_COMPUTED_GOTO: computed_goto_to_firm( &stmt->computed_goto); return;
5347 case STATEMENT_DECLARATION: declaration_statement_to_firm(&stmt->declaration); return;
5348 case STATEMENT_DO_WHILE: do_while_statement_to_firm( &stmt->do_while); return;
5349 case STATEMENT_EMPTY: /* nothing */ return;
5350 case STATEMENT_EXPRESSION: expression_statement_to_firm( &stmt->expression); return;
5351 case STATEMENT_FOR: for_statement_to_firm( &stmt->fors); return;
5352 case STATEMENT_IF: if_statement_to_firm( &stmt->ifs); return;
5353 case STATEMENT_LABEL: label_to_firm( &stmt->label); return;
5354 case STATEMENT_LEAVE: leave_statement_to_firm( &stmt->leave); return;
5355 case STATEMENT_MS_TRY: ms_try_statement_to_firm( &stmt->ms_try); return;
5356 case STATEMENT_RETURN: return_statement_to_firm( &stmt->returns); return;
5357 case STATEMENT_SWITCH: switch_statement_to_firm( &stmt->switchs); return;
5358 case STATEMENT_WHILE: while_statement_to_firm( &stmt->whiles); return;
5360 case STATEMENT_BREAK: create_jump_statement(stmt, get_break_label()); return;
5361 case STATEMENT_CONTINUE: create_jump_statement(stmt, continue_label); return;
5362 case STATEMENT_GOTO: create_jump_statement(stmt, get_label_block(stmt->gotos.label)); return;
5364 case STATEMENT_ERROR: panic("error statement found");
5366 panic("statement not implemented");
5369 static int count_local_variables(const entity_t *entity,
5370 const entity_t *const last)
5373 entity_t const *const end = last != NULL ? last->base.next : NULL;
5374 for (; entity != end; entity = entity->base.next) {
5378 if (entity->kind == ENTITY_VARIABLE) {
5379 type = skip_typeref(entity->declaration.type);
5380 address_taken = entity->variable.address_taken;
5381 } else if (entity->kind == ENTITY_PARAMETER) {
5382 type = skip_typeref(entity->declaration.type);
5383 address_taken = entity->parameter.address_taken;
5388 if (!address_taken && is_type_scalar(type))
5394 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5396 int *const count = env;
5398 switch (stmt->kind) {
5399 case STATEMENT_DECLARATION: {
5400 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5401 *count += count_local_variables(decl_stmt->declarations_begin,
5402 decl_stmt->declarations_end);
5407 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5416 * Return the number of local (alias free) variables used by a function.
5418 static int get_function_n_local_vars(entity_t *entity)
5420 const function_t *function = &entity->function;
5423 /* count parameters */
5424 count += count_local_variables(function->parameters.entities, NULL);
5426 /* count local variables declared in body */
5427 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5432 * Build Firm code for the parameters of a function.
5434 static void initialize_function_parameters(entity_t *entity)
5436 assert(entity->kind == ENTITY_FUNCTION);
5437 ir_graph *irg = current_ir_graph;
5438 ir_node *args = get_irg_args(irg);
5440 ir_type *function_irtype;
5442 if (entity->function.need_closure) {
5443 /* add an extra parameter for the static link */
5444 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5447 /* Matze: IMO this is wrong, nested functions should have an own
5448 * type and not rely on strange parameters... */
5449 function_irtype = create_method_type(&entity->declaration.type->function, true);
5451 function_irtype = get_ir_type(entity->declaration.type);
5456 entity_t *parameter = entity->function.parameters.entities;
5457 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5458 if (parameter->kind != ENTITY_PARAMETER)
5461 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5462 type_t *type = skip_typeref(parameter->declaration.type);
5464 bool needs_entity = parameter->parameter.address_taken;
5465 assert(!is_type_array(type));
5466 if (is_type_compound(type)) {
5467 needs_entity = true;
5470 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5472 ir_type *frame_type = get_irg_frame_type(irg);
5474 = new_parameter_entity(frame_type, n, param_irtype);
5475 parameter->declaration.kind
5476 = DECLARATION_KIND_PARAMETER_ENTITY;
5477 parameter->parameter.v.entity = param;
5481 ir_mode *param_mode = get_type_mode(param_irtype);
5483 ir_node *value = new_r_Proj(args, param_mode, pn);
5485 ir_mode *mode = get_ir_mode_storage(type);
5486 value = create_conv(NULL, value, mode);
5487 value = do_strict_conv(NULL, value);
5489 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5490 parameter->parameter.v.value_number = next_value_number_function;
5491 set_irg_loc_description(current_ir_graph, next_value_number_function,
5493 ++next_value_number_function;
5495 set_value(parameter->parameter.v.value_number, value);
5500 * Handle additional decl modifiers for IR-graphs
5502 * @param irg the IR-graph
5503 * @param dec_modifiers additional modifiers
5505 static void handle_decl_modifier_irg(ir_graph *irg,
5506 decl_modifiers_t decl_modifiers)
5508 if (decl_modifiers & DM_NAKED) {
5509 /* TRUE if the declaration includes the Microsoft
5510 __declspec(naked) specifier. */
5511 add_irg_additional_properties(irg, mtp_property_naked);
5513 if (decl_modifiers & DM_FORCEINLINE) {
5514 /* TRUE if the declaration includes the
5515 Microsoft __forceinline specifier. */
5516 set_irg_inline_property(irg, irg_inline_forced);
5518 if (decl_modifiers & DM_NOINLINE) {
5519 /* TRUE if the declaration includes the Microsoft
5520 __declspec(noinline) specifier. */
5521 set_irg_inline_property(irg, irg_inline_forbidden);
5525 static void add_function_pointer(ir_type *segment, ir_entity *method,
5526 const char *unique_template)
5528 ir_type *method_type = get_entity_type(method);
5529 ir_type *ptr_type = new_type_pointer(method_type);
5531 /* these entities don't really have a name but firm only allows
5533 * Note that we mustn't give these entities a name since for example
5534 * Mach-O doesn't allow them. */
5535 ident *ide = id_unique(unique_template);
5536 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5537 ir_graph *irg = get_const_code_irg();
5538 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5541 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5542 set_entity_compiler_generated(ptr, 1);
5543 set_entity_visibility(ptr, ir_visibility_private);
5544 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5545 set_atomic_ent_value(ptr, val);
5549 * Generate possible IJmp branches to a given label block.
5551 static void gen_ijmp_branches(ir_node *block)
5554 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5555 add_immBlock_pred(block, ijmp);
5560 * Create code for a function and all inner functions.
5562 * @param entity the function entity
5564 static void create_function(entity_t *entity)
5566 assert(entity->kind == ENTITY_FUNCTION);
5567 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5569 if (entity->function.statement == NULL)
5572 inner_functions = NULL;
5573 current_trampolines = NULL;
5575 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5576 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5577 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5579 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5580 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5581 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5584 current_function_entity = entity;
5585 current_function_name = NULL;
5586 current_funcsig = NULL;
5588 assert(all_labels == NULL);
5589 all_labels = NEW_ARR_F(label_t *, 0);
5592 int n_local_vars = get_function_n_local_vars(entity);
5593 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5594 current_ir_graph = irg;
5596 ir_graph *old_current_function = current_function;
5597 current_function = irg;
5599 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5600 current_vararg_entity = NULL;
5602 set_irg_fp_model(irg, firm_fp_model);
5603 tarval_enable_fp_ops(1);
5604 set_irn_dbg_info(get_irg_start_block(irg),
5605 get_entity_dbg_info(function_entity));
5607 /* set inline flags */
5608 if (entity->function.is_inline)
5609 set_irg_inline_property(irg, irg_inline_recomended);
5610 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5612 next_value_number_function = 0;
5613 initialize_function_parameters(entity);
5614 current_static_link = entity->function.static_link;
5616 statement_to_firm(entity->function.statement);
5618 ir_node *end_block = get_irg_end_block(irg);
5620 /* do we have a return statement yet? */
5621 if (currently_reachable()) {
5622 type_t *type = skip_typeref(entity->declaration.type);
5623 assert(is_type_function(type));
5624 const function_type_t *func_type = &type->function;
5625 const type_t *return_type
5626 = skip_typeref(func_type->return_type);
5629 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5630 ret = new_Return(get_store(), 0, NULL);
5633 if (is_type_scalar(return_type)) {
5634 mode = get_ir_mode_storage(func_type->return_type);
5640 /* ยง5.1.2.2.3 main implicitly returns 0 */
5641 if (is_main(entity)) {
5642 in[0] = new_Const(get_mode_null(mode));
5644 in[0] = new_Unknown(mode);
5646 ret = new_Return(get_store(), 1, in);
5648 add_immBlock_pred(end_block, ret);
5651 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5652 label_t *label = all_labels[i];
5653 if (label->address_taken) {
5654 gen_ijmp_branches(label->block);
5656 mature_immBlock(label->block);
5659 DEL_ARR_F(all_labels);
5662 irg_finalize_cons(irg);
5664 /* finalize the frame type */
5665 ir_type *frame_type = get_irg_frame_type(irg);
5666 int n = get_compound_n_members(frame_type);
5669 for (int i = 0; i < n; ++i) {
5670 ir_entity *member = get_compound_member(frame_type, i);
5671 ir_type *entity_type = get_entity_type(member);
5673 int align = get_type_alignment_bytes(entity_type);
5674 if (align > align_all)
5678 misalign = offset % align;
5680 offset += align - misalign;
5684 set_entity_offset(member, offset);
5685 offset += get_type_size_bytes(entity_type);
5687 set_type_size_bytes(frame_type, offset);
5688 set_type_alignment_bytes(frame_type, align_all);
5690 irg_verify(irg, VERIFY_ENFORCE_SSA);
5691 current_vararg_entity = old_current_vararg_entity;
5692 current_function = old_current_function;
5694 if (current_trampolines != NULL) {
5695 DEL_ARR_F(current_trampolines);
5696 current_trampolines = NULL;
5699 /* create inner functions if any */
5700 entity_t **inner = inner_functions;
5701 if (inner != NULL) {
5702 ir_type *rem_outer_frame = current_outer_frame;
5703 current_outer_frame = get_irg_frame_type(current_ir_graph);
5704 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5705 create_function(inner[i]);
5709 current_outer_frame = rem_outer_frame;
5713 static void scope_to_firm(scope_t *scope)
5715 /* first pass: create declarations */
5716 entity_t *entity = scope->entities;
5717 for ( ; entity != NULL; entity = entity->base.next) {
5718 if (entity->base.symbol == NULL)
5721 if (entity->kind == ENTITY_FUNCTION) {
5722 if (entity->function.btk != BUILTIN_NONE) {
5723 /* builtins have no representation */
5726 (void)get_function_entity(entity, NULL);
5727 } else if (entity->kind == ENTITY_VARIABLE) {
5728 create_global_variable(entity);
5729 } else if (entity->kind == ENTITY_NAMESPACE) {
5730 scope_to_firm(&entity->namespacee.members);
5734 /* second pass: create code/initializers */
5735 entity = scope->entities;
5736 for ( ; entity != NULL; entity = entity->base.next) {
5737 if (entity->base.symbol == NULL)
5740 if (entity->kind == ENTITY_FUNCTION) {
5741 if (entity->function.btk != BUILTIN_NONE) {
5742 /* builtins have no representation */
5745 create_function(entity);
5746 } else if (entity->kind == ENTITY_VARIABLE) {
5747 assert(entity->declaration.kind
5748 == DECLARATION_KIND_GLOBAL_VARIABLE);
5749 current_ir_graph = get_const_code_irg();
5750 create_variable_initializer(entity);
5755 void init_ast2firm(void)
5757 obstack_init(&asm_obst);
5758 init_atomic_modes();
5760 ir_set_debug_retrieve(dbg_retrieve);
5761 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5763 /* create idents for all known runtime functions */
5764 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5765 rts_idents[i] = new_id_from_str(rts_data[i].name);
5768 entitymap_init(&entitymap);
5771 static void init_ir_types(void)
5773 static int ir_types_initialized = 0;
5774 if (ir_types_initialized)
5776 ir_types_initialized = 1;
5778 ir_type_int = get_ir_type(type_int);
5779 ir_type_char = get_ir_type(type_char);
5780 ir_type_const_char = get_ir_type(type_const_char);
5781 ir_type_wchar_t = get_ir_type(type_wchar_t);
5782 ir_type_void = get_ir_type(type_void);
5784 be_params = be_get_backend_param();
5785 mode_float_arithmetic = be_params->mode_float_arithmetic;
5787 stack_param_align = be_params->stack_param_align;
5790 void exit_ast2firm(void)
5792 entitymap_destroy(&entitymap);
5793 obstack_free(&asm_obst, NULL);
5796 static void global_asm_to_firm(statement_t *s)
5798 for (; s != NULL; s = s->base.next) {
5799 assert(s->kind == STATEMENT_ASM);
5801 char const *const text = s->asms.asm_text.begin;
5802 size_t size = s->asms.asm_text.size;
5804 /* skip the last \0 */
5805 if (text[size - 1] == '\0')
5808 ident *const id = new_id_from_chars(text, size);
5813 void translation_unit_to_firm(translation_unit_t *unit)
5815 /* initialize firm arithmetic */
5816 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5817 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5819 /* just to be sure */
5820 continue_label = NULL;
5822 current_switch = NULL;
5823 current_translation_unit = unit;
5827 scope_to_firm(&unit->scope);
5828 global_asm_to_firm(unit->global_asm);
5830 current_ir_graph = NULL;
5831 current_translation_unit = NULL;