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 /* Happens while constant folding, when there was an error */
685 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
688 firm_type = create_atomic_type(type->atomic.akind, type);
691 firm_type = create_complex_type(&type->atomic);
694 firm_type = create_imaginary_type(&type->atomic);
697 firm_type = create_method_type(&type->function, false);
700 firm_type = create_pointer_type(&type->pointer);
703 firm_type = create_reference_type(&type->reference);
706 firm_type = create_array_type(&type->array);
708 case TYPE_COMPOUND_STRUCT:
709 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
711 case TYPE_COMPOUND_UNION:
712 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
715 firm_type = create_enum_type(&type->enumt);
722 if (firm_type == NULL)
723 panic("unknown type found");
725 type->base.firm_type = firm_type;
729 static ir_mode *get_ir_mode_storage(type_t *type)
731 ir_type *irtype = get_ir_type(type);
733 /* firm doesn't report a mode for arrays somehow... */
734 if (is_Array_type(irtype)) {
738 ir_mode *mode = get_type_mode(irtype);
739 assert(mode != NULL);
744 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
745 * int that it returns bigger modes for floating point on some platforms
746 * (x87 internally does arithemtic with 80bits)
748 static ir_mode *get_ir_mode_arithmetic(type_t *type)
750 ir_mode *mode = get_ir_mode_storage(type);
751 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
752 return mode_float_arithmetic;
759 * Return a node representing the size of a type.
761 static ir_node *get_type_size_node(type_t *type)
764 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
765 type = skip_typeref(type);
767 if (is_type_array(type) && type->array.is_vla) {
768 ir_node *size_node = get_vla_size(&type->array);
769 ir_node *elem_size = get_type_size_node(type->array.element_type);
770 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
774 size = get_type_size(type);
775 return new_Const_long(mode, size);
778 /** Names of the runtime functions. */
779 static const struct {
780 int id; /**< the rts id */
781 int n_res; /**< number of return values */
782 const char *name; /**< the name of the rts function */
783 int n_params; /**< number of parameters */
784 unsigned flags; /**< language flags */
786 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
787 { rts_abort, 0, "abort", 0, _C89 },
788 { rts_alloca, 1, "alloca", 1, _ALL },
789 { rts_abs, 1, "abs", 1, _C89 },
790 { rts_labs, 1, "labs", 1, _C89 },
791 { rts_llabs, 1, "llabs", 1, _C99 },
792 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
794 { rts_fabs, 1, "fabs", 1, _C89 },
795 { rts_sqrt, 1, "sqrt", 1, _C89 },
796 { rts_cbrt, 1, "cbrt", 1, _C99 },
797 { rts_exp, 1, "exp", 1, _C89 },
798 { rts_exp2, 1, "exp2", 1, _C89 },
799 { rts_exp10, 1, "exp10", 1, _GNUC },
800 { rts_log, 1, "log", 1, _C89 },
801 { rts_log2, 1, "log2", 1, _C89 },
802 { rts_log10, 1, "log10", 1, _C89 },
803 { rts_pow, 1, "pow", 2, _C89 },
804 { rts_sin, 1, "sin", 1, _C89 },
805 { rts_cos, 1, "cos", 1, _C89 },
806 { rts_tan, 1, "tan", 1, _C89 },
807 { rts_asin, 1, "asin", 1, _C89 },
808 { rts_acos, 1, "acos", 1, _C89 },
809 { rts_atan, 1, "atan", 1, _C89 },
810 { rts_sinh, 1, "sinh", 1, _C89 },
811 { rts_cosh, 1, "cosh", 1, _C89 },
812 { rts_tanh, 1, "tanh", 1, _C89 },
814 { rts_fabsf, 1, "fabsf", 1, _C99 },
815 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
816 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
817 { rts_expf, 1, "expf", 1, _C99 },
818 { rts_exp2f, 1, "exp2f", 1, _C99 },
819 { rts_exp10f, 1, "exp10f", 1, _GNUC },
820 { rts_logf, 1, "logf", 1, _C99 },
821 { rts_log2f, 1, "log2f", 1, _C99 },
822 { rts_log10f, 1, "log10f", 1, _C99 },
823 { rts_powf, 1, "powf", 2, _C99 },
824 { rts_sinf, 1, "sinf", 1, _C99 },
825 { rts_cosf, 1, "cosf", 1, _C99 },
826 { rts_tanf, 1, "tanf", 1, _C99 },
827 { rts_asinf, 1, "asinf", 1, _C99 },
828 { rts_acosf, 1, "acosf", 1, _C99 },
829 { rts_atanf, 1, "atanf", 1, _C99 },
830 { rts_sinhf, 1, "sinhf", 1, _C99 },
831 { rts_coshf, 1, "coshf", 1, _C99 },
832 { rts_tanhf, 1, "tanhf", 1, _C99 },
834 { rts_fabsl, 1, "fabsl", 1, _C99 },
835 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
836 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
837 { rts_expl, 1, "expl", 1, _C99 },
838 { rts_exp2l, 1, "exp2l", 1, _C99 },
839 { rts_exp10l, 1, "exp10l", 1, _GNUC },
840 { rts_logl, 1, "logl", 1, _C99 },
841 { rts_log2l, 1, "log2l", 1, _C99 },
842 { rts_log10l, 1, "log10l", 1, _C99 },
843 { rts_powl, 1, "powl", 2, _C99 },
844 { rts_sinl, 1, "sinl", 1, _C99 },
845 { rts_cosl, 1, "cosl", 1, _C99 },
846 { rts_tanl, 1, "tanl", 1, _C99 },
847 { rts_asinl, 1, "asinl", 1, _C99 },
848 { rts_acosl, 1, "acosl", 1, _C99 },
849 { rts_atanl, 1, "atanl", 1, _C99 },
850 { rts_sinhl, 1, "sinhl", 1, _C99 },
851 { rts_coshl, 1, "coshl", 1, _C99 },
852 { rts_tanhl, 1, "tanhl", 1, _C99 },
854 { rts_strcmp, 1, "strcmp", 2, _C89 },
855 { rts_strncmp, 1, "strncmp", 3, _C89 },
856 { rts_strcpy, 1, "strcpy", 2, _C89 },
857 { rts_strlen, 1, "strlen", 1, _C89 },
858 { rts_memcpy, 1, "memcpy", 3, _C89 },
859 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
860 { rts_memmove, 1, "memmove", 3, _C89 },
861 { rts_memset, 1, "memset", 3, _C89 },
862 { rts_memcmp, 1, "memcmp", 3, _C89 },
865 static ident *rts_idents[lengthof(rts_data)];
867 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
869 void set_create_ld_ident(ident *(*func)(entity_t*))
871 create_ld_ident = func;
875 * Handle GNU attributes for entities
877 * @param ent the entity
878 * @param decl the routine declaration
880 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
882 assert(is_declaration(entity));
883 decl_modifiers_t modifiers = entity->declaration.modifiers;
885 if (is_method_entity(irentity)) {
886 if (modifiers & DM_PURE) {
887 set_entity_additional_properties(irentity, mtp_property_pure);
889 if (modifiers & DM_CONST) {
890 add_entity_additional_properties(irentity, mtp_property_const);
893 if (modifiers & DM_USED) {
894 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
896 if (modifiers & DM_WEAK) {
897 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
901 static bool is_main(entity_t *entity)
903 static symbol_t *sym_main = NULL;
904 if (sym_main == NULL) {
905 sym_main = symbol_table_insert("main");
908 if (entity->base.symbol != sym_main)
910 /* must be in outermost scope */
911 if (entity->base.parent_scope != ¤t_translation_unit->scope)
918 * Creates an entity representing a function.
920 * @param entity the function declaration/definition
921 * @param owner_type the owner type of this function, NULL
922 * for global functions
924 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
926 assert(entity->kind == ENTITY_FUNCTION);
927 if (entity->function.irentity != NULL)
928 return entity->function.irentity;
930 switch (entity->function.btk) {
933 case BUILTIN_LIBC_CHECK:
939 if (is_main(entity)) {
940 /* force main to C linkage */
941 type_t *type = entity->declaration.type;
942 assert(is_type_function(type));
943 if (type->function.linkage != LINKAGE_C) {
944 type_t *new_type = duplicate_type(type);
945 new_type->function.linkage = LINKAGE_C;
946 type = identify_new_type(new_type);
947 entity->declaration.type = type;
951 symbol_t *symbol = entity->base.symbol;
952 ident *id = new_id_from_str(symbol->string);
954 /* already an entity defined? */
955 ir_entity *irentity = entitymap_get(&entitymap, symbol);
956 bool const has_body = entity->function.statement != NULL;
957 if (irentity != NULL) {
958 if (get_entity_visibility(irentity) == ir_visibility_external
960 set_entity_visibility(irentity, ir_visibility_default);
965 ir_type *ir_type_method;
966 if (entity->function.need_closure)
967 ir_type_method = create_method_type(&entity->declaration.type->function, true);
969 ir_type_method = get_ir_type(entity->declaration.type);
971 bool nested_function = false;
972 if (owner_type == NULL)
973 owner_type = get_glob_type();
975 nested_function = true;
977 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
978 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
982 ld_id = id_unique("inner.%u");
984 ld_id = create_ld_ident(entity);
985 set_entity_ld_ident(irentity, ld_id);
987 handle_decl_modifiers(irentity, entity);
989 if (! nested_function) {
990 /* static inline => local
991 * extern inline => local
992 * inline without definition => local
993 * inline with definition => external_visible */
994 storage_class_tag_t const storage_class
995 = (storage_class_tag_t) entity->declaration.storage_class;
996 bool const is_inline = entity->function.is_inline;
998 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
999 set_entity_visibility(irentity, ir_visibility_default);
1000 } else if (storage_class == STORAGE_CLASS_STATIC ||
1001 (is_inline && has_body)) {
1002 set_entity_visibility(irentity, ir_visibility_local);
1003 } else if (has_body) {
1004 set_entity_visibility(irentity, ir_visibility_default);
1006 set_entity_visibility(irentity, ir_visibility_external);
1009 /* nested functions are always local */
1010 set_entity_visibility(irentity, ir_visibility_local);
1013 /* We should check for file scope here, but as long as we compile C only
1014 this is not needed. */
1015 if (!freestanding && !has_body) {
1016 /* check for a known runtime function */
1017 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1018 if (id != rts_idents[i])
1021 function_type_t *function_type
1022 = &entity->declaration.type->function;
1023 /* rts_entities code can't handle a "wrong" number of parameters */
1024 if (function_type->unspecified_parameters)
1027 /* check number of parameters */
1028 int n_params = count_parameters(function_type);
1029 if (n_params != rts_data[i].n_params)
1032 type_t *return_type = skip_typeref(function_type->return_type);
1033 int n_res = return_type != type_void ? 1 : 0;
1034 if (n_res != rts_data[i].n_res)
1037 /* ignore those rts functions not necessary needed for current mode */
1038 if ((c_mode & rts_data[i].flags) == 0)
1040 assert(rts_entities[rts_data[i].id] == NULL);
1041 rts_entities[rts_data[i].id] = irentity;
1045 entitymap_insert(&entitymap, symbol, irentity);
1048 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1049 entity->function.irentity = irentity;
1055 * Creates a SymConst for a given entity.
1057 * @param dbgi debug info
1058 * @param entity the entity
1060 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1062 assert(entity != NULL);
1063 union symconst_symbol sym;
1064 sym.entity_p = entity;
1065 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1068 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1070 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1073 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1076 if (is_Const(value)) {
1077 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1080 ir_node *cond = new_d_Cond(dbgi, value);
1081 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1082 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1083 ir_node *tblock = new_Block(1, &proj_true);
1084 ir_node *fblock = new_Block(1, &proj_false);
1085 set_cur_block(tblock);
1086 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1087 ir_node *tjump = new_Jmp();
1088 set_cur_block(fblock);
1089 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1090 ir_node *fjump = new_Jmp();
1092 ir_node *in[2] = { tjump, fjump };
1093 ir_node *mergeblock = new_Block(2, in);
1094 set_cur_block(mergeblock);
1095 ir_node *phi_in[2] = { const1, const0 };
1096 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1100 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1102 ir_mode *value_mode = get_irn_mode(value);
1104 if (value_mode == dest_mode)
1107 if (dest_mode == mode_b) {
1108 ir_node *zero = new_Const(get_mode_null(value_mode));
1109 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1111 } else if (value_mode == mode_b) {
1112 return create_conv_from_b(dbgi, value, dest_mode);
1115 return new_d_Conv(dbgi, value, dest_mode);
1119 * Creates a SymConst node representing a wide string literal.
1121 * @param literal the wide string literal
1123 static ir_node *wide_string_literal_to_firm(
1124 const string_literal_expression_t *literal)
1126 ir_type *const global_type = get_glob_type();
1127 ir_type *const elem_type = ir_type_wchar_t;
1128 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1129 ir_type *const type = new_type_array(1, elem_type);
1131 ident *const id = id_unique("str.%u");
1132 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1133 set_entity_ld_ident(entity, id);
1134 set_entity_visibility(entity, ir_visibility_private);
1135 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1137 ir_mode *const mode = get_type_mode(elem_type);
1138 const size_t slen = wstrlen(&literal->value);
1140 set_array_lower_bound_int(type, 0, 0);
1141 set_array_upper_bound_int(type, 0, slen);
1142 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1143 set_type_state(type, layout_fixed);
1145 ir_initializer_t *initializer = create_initializer_compound(slen);
1146 const char *p = literal->value.begin;
1147 for (size_t i = 0; i < slen; ++i) {
1148 assert(p < literal->value.begin + literal->value.size);
1149 utf32 v = read_utf8_char(&p);
1150 ir_tarval *tv = new_tarval_from_long(v, mode);
1151 ir_initializer_t *val = create_initializer_tarval(tv);
1152 set_initializer_compound_value(initializer, i, val);
1154 set_entity_initializer(entity, initializer);
1156 return create_symconst(dbgi, entity);
1160 * Creates a SymConst node representing a string constant.
1162 * @param src_pos the source position of the string constant
1163 * @param id_prefix a prefix for the name of the generated string constant
1164 * @param value the value of the string constant
1166 static ir_node *string_to_firm(const source_position_t *const src_pos,
1167 const char *const id_prefix,
1168 const string_t *const value)
1170 ir_type *const global_type = get_glob_type();
1171 dbg_info *const dbgi = get_dbg_info(src_pos);
1172 ir_type *const type = new_type_array(1, ir_type_const_char);
1174 ident *const id = id_unique(id_prefix);
1175 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1176 set_entity_ld_ident(entity, id);
1177 set_entity_visibility(entity, ir_visibility_private);
1178 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1180 ir_type *const elem_type = ir_type_const_char;
1181 ir_mode *const mode = get_type_mode(elem_type);
1183 const char* const string = value->begin;
1184 const size_t slen = value->size;
1186 set_array_lower_bound_int(type, 0, 0);
1187 set_array_upper_bound_int(type, 0, slen);
1188 set_type_size_bytes(type, slen);
1189 set_type_state(type, layout_fixed);
1191 ir_initializer_t *initializer = create_initializer_compound(slen);
1192 for (size_t i = 0; i < slen; ++i) {
1193 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1194 ir_initializer_t *val = create_initializer_tarval(tv);
1195 set_initializer_compound_value(initializer, i, val);
1197 set_entity_initializer(entity, initializer);
1199 return create_symconst(dbgi, entity);
1202 static bool try_create_integer(literal_expression_t *literal,
1203 type_t *type, unsigned char base)
1205 const char *string = literal->value.begin;
1206 size_t size = literal->value.size;
1208 assert(type->kind == TYPE_ATOMIC);
1209 atomic_type_kind_t akind = type->atomic.akind;
1211 ir_mode *mode = atomic_modes[akind];
1212 ir_tarval *tv = new_integer_tarval_from_str(string, size, 1, base, mode);
1213 if (tv == tarval_bad)
1216 literal->base.type = type;
1217 literal->target_value = tv;
1221 static void create_integer_tarval(literal_expression_t *literal)
1225 const string_t *suffix = &literal->suffix;
1227 if (suffix->size > 0) {
1228 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1229 if (*c == 'u' || *c == 'U') { ++us; }
1230 if (*c == 'l' || *c == 'L') { ++ls; }
1235 switch (literal->base.kind) {
1236 case EXPR_LITERAL_INTEGER_OCTAL: base = 8; break;
1237 case EXPR_LITERAL_INTEGER: base = 10; break;
1238 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1239 default: panic("invalid literal kind");
1242 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1244 /* now try if the constant is small enough for some types */
1245 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1247 if (us == 0 && try_create_integer(literal, type_int, base))
1249 if ((us == 1 || base != 10)
1250 && try_create_integer(literal, type_unsigned_int, base))
1254 if (us == 0 && try_create_integer(literal, type_long, base))
1256 if ((us == 1 || base != 10)
1257 && try_create_integer(literal, type_unsigned_long, base))
1260 /* last try? then we should not report tarval_bad */
1261 if (us != 1 && base == 10)
1262 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1263 if (us == 0 && try_create_integer(literal, type_long_long, base))
1267 assert(us == 1 || base != 10);
1268 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1269 bool res = try_create_integer(literal, type_unsigned_long_long, base);
1271 panic("internal error when parsing number literal");
1274 tarval_set_integer_overflow_mode(old_mode);
1277 void determine_literal_type(literal_expression_t *literal)
1279 switch (literal->base.kind) {
1280 case EXPR_LITERAL_INTEGER:
1281 case EXPR_LITERAL_INTEGER_OCTAL:
1282 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1283 create_integer_tarval(literal);
1291 * Creates a Const node representing a constant.
1293 static ir_node *literal_to_firm(const literal_expression_t *literal)
1295 type_t *type = skip_typeref(literal->base.type);
1296 ir_mode *mode = get_ir_mode_storage(type);
1297 const char *string = literal->value.begin;
1298 size_t size = literal->value.size;
1301 switch (literal->base.kind) {
1302 case EXPR_LITERAL_WIDE_CHARACTER: {
1303 utf32 v = read_utf8_char(&string);
1305 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1307 tv = new_tarval_from_str(buf, len, mode);
1310 case EXPR_LITERAL_CHARACTER: {
1313 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1314 if (size == 1 && char_is_signed) {
1315 v = (signed char)string[0];
1318 for (size_t i = 0; i < size; ++i) {
1319 v = (v << 8) | ((unsigned char)string[i]);
1323 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1325 tv = new_tarval_from_str(buf, len, mode);
1328 case EXPR_LITERAL_INTEGER:
1329 case EXPR_LITERAL_INTEGER_OCTAL:
1330 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1331 assert(literal->target_value != NULL);
1332 tv = literal->target_value;
1334 case EXPR_LITERAL_FLOATINGPOINT:
1335 tv = new_tarval_from_str(string, size, mode);
1337 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1338 char buffer[size + 2];
1339 memcpy(buffer, "0x", 2);
1340 memcpy(buffer+2, string, size);
1341 tv = new_tarval_from_str(buffer, size+2, mode);
1344 case EXPR_LITERAL_BOOLEAN:
1345 if (string[0] == 't') {
1346 tv = get_mode_one(mode);
1348 assert(string[0] == 'f');
1349 tv = get_mode_null(mode);
1352 case EXPR_LITERAL_MS_NOOP:
1353 tv = get_mode_null(mode);
1358 panic("Invalid literal kind found");
1361 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1362 ir_node *res = new_d_Const(dbgi, tv);
1363 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1364 return create_conv(dbgi, res, mode_arith);
1368 * Allocate an area of size bytes aligned at alignment
1371 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1373 static unsigned area_cnt = 0;
1376 ir_type *tp = new_type_array(1, ir_type_char);
1377 set_array_bounds_int(tp, 0, 0, size);
1378 set_type_alignment_bytes(tp, alignment);
1380 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1381 ident *name = new_id_from_str(buf);
1382 ir_entity *area = new_entity(frame_type, name, tp);
1384 /* mark this entity as compiler generated */
1385 set_entity_compiler_generated(area, 1);
1390 * Return a node representing a trampoline region
1391 * for a given function entity.
1393 * @param dbgi debug info
1394 * @param entity the function entity
1396 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1398 ir_entity *region = NULL;
1401 if (current_trampolines != NULL) {
1402 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1403 if (current_trampolines[i].function == entity) {
1404 region = current_trampolines[i].region;
1409 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1411 ir_graph *irg = current_ir_graph;
1412 if (region == NULL) {
1413 /* create a new region */
1414 ir_type *frame_tp = get_irg_frame_type(irg);
1415 trampoline_region reg;
1416 reg.function = entity;
1418 reg.region = alloc_trampoline(frame_tp,
1419 be_params->trampoline_size,
1420 be_params->trampoline_align);
1421 ARR_APP1(trampoline_region, current_trampolines, reg);
1422 region = reg.region;
1424 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1429 * Creates a trampoline for a function represented by an entity.
1431 * @param dbgi debug info
1432 * @param mode the (reference) mode for the function address
1433 * @param entity the function entity
1435 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1438 assert(entity != NULL);
1440 in[0] = get_trampoline_region(dbgi, entity);
1441 in[1] = create_symconst(dbgi, entity);
1442 in[2] = get_irg_frame(current_ir_graph);
1444 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1445 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1446 return new_Proj(irn, mode, pn_Builtin_max+1);
1450 * Dereference an address.
1452 * @param dbgi debug info
1453 * @param type the type of the dereferenced result (the points_to type)
1454 * @param addr the address to dereference
1456 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1457 ir_node *const addr)
1459 type_t *skipped = skip_typeref(type);
1460 if (is_type_incomplete(skipped))
1463 ir_type *irtype = get_ir_type(skipped);
1464 if (is_compound_type(irtype)
1465 || is_Method_type(irtype)
1466 || is_Array_type(irtype)) {
1470 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1471 ? cons_volatile : cons_none;
1472 ir_mode *const mode = get_type_mode(irtype);
1473 ir_node *const memory = get_store();
1474 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1475 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1476 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1478 set_store(load_mem);
1480 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1481 return create_conv(dbgi, load_res, mode_arithmetic);
1485 * Creates a strict Conv (to the node's mode) if necessary.
1487 * @param dbgi debug info
1488 * @param node the node to strict conv
1490 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1492 ir_mode *mode = get_irn_mode(node);
1494 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1496 if (!mode_is_float(mode))
1499 /* check if there is already a Conv */
1500 if (is_Conv(node)) {
1501 /* convert it into a strict Conv */
1502 set_Conv_strict(node, 1);
1506 /* otherwise create a new one */
1507 return new_d_strictConv(dbgi, node, mode);
1511 * Returns the correct base address depending on whether it is a parameter or a
1512 * normal local variable.
1514 static ir_node *get_local_frame(ir_entity *const ent)
1516 ir_graph *const irg = current_ir_graph;
1517 const ir_type *const owner = get_entity_owner(ent);
1518 if (owner == current_outer_frame) {
1519 assert(current_static_link != NULL);
1520 return current_static_link;
1522 return get_irg_frame(irg);
1527 * Keep all memory edges of the given block.
1529 static void keep_all_memory(ir_node *block)
1531 ir_node *old = get_cur_block();
1533 set_cur_block(block);
1534 keep_alive(get_store());
1535 /* TODO: keep all memory edges from restricted pointers */
1539 static ir_node *reference_expression_enum_value_to_firm(
1540 const reference_expression_t *ref)
1542 entity_t *entity = ref->entity;
1543 if (entity->enum_value.tv == NULL) {
1544 type_t *type = skip_typeref(entity->enum_value.enum_type);
1545 assert(type->kind == TYPE_ENUM);
1546 determine_enum_values(&type->enumt);
1549 return new_Const(entity->enum_value.tv);
1552 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1554 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1555 entity_t *entity = ref->entity;
1556 assert(is_declaration(entity));
1557 type_t *type = skip_typeref(entity->declaration.type);
1559 /* make sure the type is constructed */
1560 (void) get_ir_type(type);
1562 if (entity->kind == ENTITY_FUNCTION
1563 && entity->function.btk != BUILTIN_NONE) {
1564 ir_entity *irentity = get_function_entity(entity, NULL);
1565 /* for gcc compatibility we have to produce (dummy) addresses for some
1566 * builtins which don't have entities */
1567 if (irentity == NULL) {
1568 source_position_t const *const pos = &ref->base.source_position;
1569 symbol_t const *const sym = ref->entity->base.symbol;
1570 warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1572 /* simply create a NULL pointer */
1573 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1574 ir_node *res = new_Const(get_mode_null(mode));
1580 switch ((declaration_kind_t) entity->declaration.kind) {
1581 case DECLARATION_KIND_UNKNOWN:
1584 case DECLARATION_KIND_LOCAL_VARIABLE: {
1585 ir_mode *const mode = get_ir_mode_storage(type);
1586 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1587 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1589 case DECLARATION_KIND_PARAMETER: {
1590 ir_mode *const mode = get_ir_mode_storage(type);
1591 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1592 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1594 case DECLARATION_KIND_FUNCTION: {
1595 return create_symconst(dbgi, entity->function.irentity);
1597 case DECLARATION_KIND_INNER_FUNCTION: {
1598 ir_mode *const mode = get_ir_mode_storage(type);
1599 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1600 /* inner function not using the closure */
1601 return create_symconst(dbgi, entity->function.irentity);
1603 /* need trampoline here */
1604 return create_trampoline(dbgi, mode, entity->function.irentity);
1607 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1608 const variable_t *variable = &entity->variable;
1609 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1610 return deref_address(dbgi, variable->base.type, addr);
1613 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1614 ir_entity *irentity = entity->variable.v.entity;
1615 ir_node *frame = get_local_frame(irentity);
1616 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1617 return deref_address(dbgi, entity->declaration.type, sel);
1619 case DECLARATION_KIND_PARAMETER_ENTITY: {
1620 ir_entity *irentity = entity->parameter.v.entity;
1621 ir_node *frame = get_local_frame(irentity);
1622 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1623 return deref_address(dbgi, entity->declaration.type, sel);
1626 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1627 return entity->variable.v.vla_base;
1629 case DECLARATION_KIND_COMPOUND_MEMBER:
1630 panic("not implemented reference type");
1633 panic("reference to declaration with unknown type found");
1636 static ir_node *reference_addr(const reference_expression_t *ref)
1638 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1639 entity_t *entity = ref->entity;
1640 assert(is_declaration(entity));
1642 switch((declaration_kind_t) entity->declaration.kind) {
1643 case DECLARATION_KIND_UNKNOWN:
1645 case DECLARATION_KIND_PARAMETER:
1646 case DECLARATION_KIND_LOCAL_VARIABLE:
1647 /* you can store to a local variable (so we don't panic but return NULL
1648 * as an indicator for no real address) */
1650 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1651 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1654 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1655 ir_entity *irentity = entity->variable.v.entity;
1656 ir_node *frame = get_local_frame(irentity);
1657 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1661 case DECLARATION_KIND_PARAMETER_ENTITY: {
1662 ir_entity *irentity = entity->parameter.v.entity;
1663 ir_node *frame = get_local_frame(irentity);
1664 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1669 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1670 return entity->variable.v.vla_base;
1672 case DECLARATION_KIND_FUNCTION: {
1673 return create_symconst(dbgi, entity->function.irentity);
1676 case DECLARATION_KIND_INNER_FUNCTION: {
1677 type_t *const type = skip_typeref(entity->declaration.type);
1678 ir_mode *const mode = get_ir_mode_storage(type);
1679 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1680 /* inner function not using the closure */
1681 return create_symconst(dbgi, entity->function.irentity);
1683 /* need trampoline here */
1684 return create_trampoline(dbgi, mode, entity->function.irentity);
1688 case DECLARATION_KIND_COMPOUND_MEMBER:
1689 panic("not implemented reference type");
1692 panic("reference to declaration with unknown type found");
1696 * Transform calls to builtin functions.
1698 static ir_node *process_builtin_call(const call_expression_t *call)
1700 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1702 assert(call->function->kind == EXPR_REFERENCE);
1703 reference_expression_t *builtin = &call->function->reference;
1705 type_t *expr_type = skip_typeref(builtin->base.type);
1706 assert(is_type_pointer(expr_type));
1708 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1710 switch (builtin->entity->function.btk) {
1713 case BUILTIN_ALLOCA: {
1714 expression_t *argument = call->arguments->expression;
1715 ir_node *size = expression_to_firm(argument);
1717 ir_node *store = get_store();
1718 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1720 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1722 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1727 type_t *type = function_type->function.return_type;
1728 ir_mode *mode = get_ir_mode_arithmetic(type);
1729 ir_tarval *tv = get_mode_infinite(mode);
1730 ir_node *res = new_d_Const(dbgi, tv);
1734 /* Ignore string for now... */
1735 assert(is_type_function(function_type));
1736 type_t *type = function_type->function.return_type;
1737 ir_mode *mode = get_ir_mode_arithmetic(type);
1738 ir_tarval *tv = get_mode_NAN(mode);
1739 ir_node *res = new_d_Const(dbgi, tv);
1742 case BUILTIN_EXPECT: {
1743 expression_t *argument = call->arguments->expression;
1744 return _expression_to_firm(argument);
1746 case BUILTIN_VA_END:
1747 /* evaluate the argument of va_end for its side effects */
1748 _expression_to_firm(call->arguments->expression);
1750 case BUILTIN_OBJECT_SIZE: {
1751 /* determine value of "type" */
1752 expression_t *type_expression = call->arguments->next->expression;
1753 long type_val = fold_constant_to_int(type_expression);
1754 type_t *type = function_type->function.return_type;
1755 ir_mode *mode = get_ir_mode_arithmetic(type);
1756 /* just produce a "I don't know" result */
1757 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1758 get_mode_minus_one(mode);
1760 return new_d_Const(dbgi, result);
1762 case BUILTIN_ROTL: {
1763 ir_node *val = expression_to_firm(call->arguments->expression);
1764 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1765 ir_mode *mode = get_irn_mode(val);
1766 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1767 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1769 case BUILTIN_ROTR: {
1770 ir_node *val = expression_to_firm(call->arguments->expression);
1771 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1772 ir_mode *mode = get_irn_mode(val);
1773 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1774 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1775 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1776 return new_d_Rotl(dbgi, val, sub, mode);
1781 case BUILTIN_LIBC_CHECK:
1782 panic("builtin did not produce an entity");
1784 panic("invalid builtin found");
1788 * Transform a call expression.
1789 * Handles some special cases, like alloca() calls, which must be resolved
1790 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1791 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1794 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1796 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1797 assert(currently_reachable());
1799 expression_t *function = call->function;
1800 ir_node *callee = NULL;
1801 bool firm_builtin = false;
1802 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1803 if (function->kind == EXPR_REFERENCE) {
1804 const reference_expression_t *ref = &function->reference;
1805 entity_t *entity = ref->entity;
1807 if (entity->kind == ENTITY_FUNCTION) {
1808 builtin_kind_t builtin = entity->function.btk;
1809 if (builtin == BUILTIN_FIRM) {
1810 firm_builtin = true;
1811 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1812 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1813 && builtin != BUILTIN_LIBC_CHECK) {
1814 return process_builtin_call(call);
1819 callee = expression_to_firm(function);
1821 type_t *type = skip_typeref(function->base.type);
1822 assert(is_type_pointer(type));
1823 pointer_type_t *pointer_type = &type->pointer;
1824 type_t *points_to = skip_typeref(pointer_type->points_to);
1825 assert(is_type_function(points_to));
1826 function_type_t *function_type = &points_to->function;
1828 int n_parameters = 0;
1829 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1830 ir_type *new_method_type = NULL;
1831 if (function_type->variadic || function_type->unspecified_parameters) {
1832 const call_argument_t *argument = call->arguments;
1833 for ( ; argument != NULL; argument = argument->next) {
1837 /* we need to construct a new method type matching the call
1839 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1840 int n_res = get_method_n_ress(ir_method_type);
1841 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1842 set_method_calling_convention(new_method_type,
1843 get_method_calling_convention(ir_method_type));
1844 set_method_additional_properties(new_method_type,
1845 get_method_additional_properties(ir_method_type));
1846 set_method_variadicity(new_method_type,
1847 get_method_variadicity(ir_method_type));
1849 for (int i = 0; i < n_res; ++i) {
1850 set_method_res_type(new_method_type, i,
1851 get_method_res_type(ir_method_type, i));
1853 argument = call->arguments;
1854 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1855 expression_t *expression = argument->expression;
1856 ir_type *irtype = get_ir_type(expression->base.type);
1857 set_method_param_type(new_method_type, i, irtype);
1859 ir_method_type = new_method_type;
1861 n_parameters = get_method_n_params(ir_method_type);
1864 ir_node *in[n_parameters];
1866 const call_argument_t *argument = call->arguments;
1867 for (int n = 0; n < n_parameters; ++n) {
1868 expression_t *expression = argument->expression;
1869 ir_node *arg_node = expression_to_firm(expression);
1871 type_t *arg_type = skip_typeref(expression->base.type);
1872 if (!is_type_compound(arg_type)) {
1873 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1874 arg_node = create_conv(dbgi, arg_node, mode);
1875 arg_node = do_strict_conv(dbgi, arg_node);
1880 argument = argument->next;
1884 if (function_type->modifiers & DM_CONST) {
1885 store = get_irg_no_mem(current_ir_graph);
1887 store = get_store();
1891 type_t *return_type = skip_typeref(function_type->return_type);
1892 ir_node *result = NULL;
1894 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1896 if (! (function_type->modifiers & DM_CONST)) {
1897 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1901 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1902 assert(is_type_scalar(return_type));
1903 ir_mode *mode = get_ir_mode_storage(return_type);
1904 result = new_Proj(node, mode, pn_Builtin_max+1);
1905 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1906 result = create_conv(NULL, result, mode_arith);
1909 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1910 if (! (function_type->modifiers & DM_CONST)) {
1911 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1915 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1916 ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1918 if (is_type_scalar(return_type)) {
1919 ir_mode *mode = get_ir_mode_storage(return_type);
1920 result = new_Proj(resproj, mode, 0);
1921 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1922 result = create_conv(NULL, result, mode_arith);
1924 ir_mode *mode = mode_P_data;
1925 result = new_Proj(resproj, mode, 0);
1930 if (function_type->modifiers & DM_NORETURN) {
1931 /* A dead end: Keep the Call and the Block. Also place all further
1932 * nodes into a new and unreachable block. */
1934 keep_alive(get_cur_block());
1935 ir_node *block = new_Block(0, NULL);
1936 set_cur_block(block);
1942 static void statement_to_firm(statement_t *statement);
1943 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1945 static ir_node *expression_to_addr(const expression_t *expression);
1946 static ir_node *create_condition_evaluation(const expression_t *expression,
1947 ir_node *true_block,
1948 ir_node *false_block);
1950 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1953 if (!is_type_compound(type)) {
1954 ir_mode *mode = get_ir_mode_storage(type);
1955 value = create_conv(dbgi, value, mode);
1956 value = do_strict_conv(dbgi, value);
1959 ir_node *memory = get_store();
1961 if (is_type_scalar(type)) {
1962 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1963 ? cons_volatile : cons_none;
1964 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1965 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1966 set_store(store_mem);
1968 ir_type *irtype = get_ir_type(type);
1969 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1970 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1971 set_store(copyb_mem);
1975 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1977 ir_tarval *all_one = get_mode_all_one(mode);
1978 int mode_size = get_mode_size_bits(mode);
1979 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1981 assert(offset >= 0);
1983 assert(offset + size <= mode_size);
1984 if (size == mode_size) {
1988 long shiftr = get_mode_size_bits(mode) - size;
1989 long shiftl = offset;
1990 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1991 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1992 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1993 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1998 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1999 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
2002 ir_type *entity_type = get_entity_type(entity);
2003 ir_type *base_type = get_primitive_base_type(entity_type);
2004 ir_mode *mode = get_type_mode(base_type);
2005 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2007 value = create_conv(dbgi, value, mode);
2009 /* kill upper bits of value and shift to right position */
2010 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
2011 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
2012 unsigned base_bits = get_mode_size_bits(mode);
2013 unsigned shiftwidth = base_bits - bitsize;
2015 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
2016 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
2018 unsigned shrwidth = base_bits - bitsize - bitoffset;
2019 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
2020 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
2022 /* load current value */
2023 ir_node *mem = get_store();
2024 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2025 set_volatile ? cons_volatile : cons_none);
2026 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2027 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2028 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2029 ir_tarval *inv_mask = tarval_not(shift_mask);
2030 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2031 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2033 /* construct new value and store */
2034 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2035 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2036 set_volatile ? cons_volatile : cons_none);
2037 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2038 set_store(store_mem);
2044 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2045 if (mode_is_signed(mode)) {
2046 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2048 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2053 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2056 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2057 entity_t *entity = expression->compound_entry;
2058 type_t *base_type = entity->declaration.type;
2059 ir_mode *mode = get_ir_mode_storage(base_type);
2060 ir_node *mem = get_store();
2061 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2062 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2063 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2064 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2066 ir_mode *amode = mode;
2067 /* optimisation, since shifting in modes < machine_size is usually
2069 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2072 unsigned amode_size = get_mode_size_bits(amode);
2073 load_res = create_conv(dbgi, load_res, amode);
2075 set_store(load_mem);
2077 /* kill upper bits */
2078 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2079 unsigned bitoffset = entity->compound_member.bit_offset;
2080 unsigned bitsize = entity->compound_member.bit_size;
2081 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
2082 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
2083 ir_node *countl = new_d_Const(dbgi, tvl);
2084 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
2086 unsigned shift_bitsr = bitoffset + shift_bitsl;
2087 assert(shift_bitsr <= amode_size);
2088 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
2089 ir_node *countr = new_d_Const(dbgi, tvr);
2091 if (mode_is_signed(mode)) {
2092 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2094 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2097 type_t *type = expression->base.type;
2098 ir_mode *resmode = get_ir_mode_arithmetic(type);
2099 return create_conv(dbgi, shiftr, resmode);
2102 /* make sure the selected compound type is constructed */
2103 static void construct_select_compound(const select_expression_t *expression)
2105 type_t *type = skip_typeref(expression->compound->base.type);
2106 if (is_type_pointer(type)) {
2107 type = type->pointer.points_to;
2109 (void) get_ir_type(type);
2112 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2113 ir_node *value, ir_node *addr)
2115 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2116 type_t *type = skip_typeref(expression->base.type);
2118 if (!is_type_compound(type)) {
2119 ir_mode *mode = get_ir_mode_storage(type);
2120 value = create_conv(dbgi, value, mode);
2121 value = do_strict_conv(dbgi, value);
2124 if (expression->kind == EXPR_REFERENCE) {
2125 const reference_expression_t *ref = &expression->reference;
2127 entity_t *entity = ref->entity;
2128 assert(is_declaration(entity));
2129 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2130 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2131 set_value(entity->variable.v.value_number, value);
2133 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2134 set_value(entity->parameter.v.value_number, value);
2140 addr = expression_to_addr(expression);
2141 assert(addr != NULL);
2143 if (expression->kind == EXPR_SELECT) {
2144 const select_expression_t *select = &expression->select;
2146 construct_select_compound(select);
2148 entity_t *entity = select->compound_entry;
2149 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2150 if (entity->compound_member.bitfield) {
2151 ir_entity *irentity = entity->compound_member.entity;
2153 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2154 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2155 set_volatile, true);
2160 assign_value(dbgi, addr, type, value);
2164 static void set_value_for_expression(const expression_t *expression,
2167 set_value_for_expression_addr(expression, value, NULL);
2170 static ir_node *get_value_from_lvalue(const expression_t *expression,
2173 if (expression->kind == EXPR_REFERENCE) {
2174 const reference_expression_t *ref = &expression->reference;
2176 entity_t *entity = ref->entity;
2177 assert(entity->kind == ENTITY_VARIABLE
2178 || entity->kind == ENTITY_PARAMETER);
2179 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2181 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2182 value_number = entity->variable.v.value_number;
2183 assert(addr == NULL);
2184 type_t *type = skip_typeref(expression->base.type);
2185 ir_mode *mode = get_ir_mode_storage(type);
2186 ir_node *res = get_value(value_number, mode);
2187 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2188 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2189 value_number = entity->parameter.v.value_number;
2190 assert(addr == NULL);
2191 type_t *type = skip_typeref(expression->base.type);
2192 ir_mode *mode = get_ir_mode_storage(type);
2193 ir_node *res = get_value(value_number, mode);
2194 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2198 assert(addr != NULL);
2199 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2202 if (expression->kind == EXPR_SELECT &&
2203 expression->select.compound_entry->compound_member.bitfield) {
2204 construct_select_compound(&expression->select);
2205 value = bitfield_extract_to_firm(&expression->select, addr);
2207 value = deref_address(dbgi, expression->base.type, addr);
2214 static ir_node *create_incdec(const unary_expression_t *expression)
2216 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2217 const expression_t *value_expr = expression->value;
2218 ir_node *addr = expression_to_addr(value_expr);
2219 ir_node *value = get_value_from_lvalue(value_expr, addr);
2221 type_t *type = skip_typeref(expression->base.type);
2222 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2225 if (is_type_pointer(type)) {
2226 pointer_type_t *pointer_type = &type->pointer;
2227 offset = get_type_size_node(pointer_type->points_to);
2229 assert(is_type_arithmetic(type));
2230 offset = new_Const(get_mode_one(mode));
2234 ir_node *store_value;
2235 switch(expression->base.kind) {
2236 case EXPR_UNARY_POSTFIX_INCREMENT:
2238 store_value = new_d_Add(dbgi, value, offset, mode);
2240 case EXPR_UNARY_POSTFIX_DECREMENT:
2242 store_value = new_d_Sub(dbgi, value, offset, mode);
2244 case EXPR_UNARY_PREFIX_INCREMENT:
2245 result = new_d_Add(dbgi, value, offset, mode);
2246 store_value = result;
2248 case EXPR_UNARY_PREFIX_DECREMENT:
2249 result = new_d_Sub(dbgi, value, offset, mode);
2250 store_value = result;
2253 panic("no incdec expr in create_incdec");
2256 set_value_for_expression_addr(value_expr, store_value, addr);
2261 static bool is_local_variable(expression_t *expression)
2263 if (expression->kind != EXPR_REFERENCE)
2265 reference_expression_t *ref_expr = &expression->reference;
2266 entity_t *entity = ref_expr->entity;
2267 if (entity->kind != ENTITY_VARIABLE)
2269 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2270 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2273 static ir_relation get_relation(const expression_kind_t kind)
2276 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2277 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2278 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2279 case EXPR_BINARY_ISLESS:
2280 case EXPR_BINARY_LESS: return ir_relation_less;
2281 case EXPR_BINARY_ISLESSEQUAL:
2282 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2283 case EXPR_BINARY_ISGREATER:
2284 case EXPR_BINARY_GREATER: return ir_relation_greater;
2285 case EXPR_BINARY_ISGREATEREQUAL:
2286 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2287 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2292 panic("trying to get pn_Cmp from non-comparison binexpr type");
2296 * Handle the assume optimizer hint: check if a Confirm
2297 * node can be created.
2299 * @param dbi debug info
2300 * @param expr the IL assume expression
2302 * we support here only some simple cases:
2307 static ir_node *handle_assume_compare(dbg_info *dbi,
2308 const binary_expression_t *expression)
2310 expression_t *op1 = expression->left;
2311 expression_t *op2 = expression->right;
2312 entity_t *var2, *var = NULL;
2313 ir_node *res = NULL;
2314 ir_relation relation = get_relation(expression->base.kind);
2316 if (is_local_variable(op1) && is_local_variable(op2)) {
2317 var = op1->reference.entity;
2318 var2 = op2->reference.entity;
2320 type_t *const type = skip_typeref(var->declaration.type);
2321 ir_mode *const mode = get_ir_mode_storage(type);
2323 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2324 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2326 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2327 set_value(var2->variable.v.value_number, res);
2329 res = new_d_Confirm(dbi, irn1, irn2, relation);
2330 set_value(var->variable.v.value_number, res);
2335 expression_t *con = NULL;
2336 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2337 var = op1->reference.entity;
2339 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2340 relation = get_inversed_relation(relation);
2341 var = op2->reference.entity;
2346 type_t *const type = skip_typeref(var->declaration.type);
2347 ir_mode *const mode = get_ir_mode_storage(type);
2349 res = get_value(var->variable.v.value_number, mode);
2350 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2351 set_value(var->variable.v.value_number, res);
2357 * Handle the assume optimizer hint.
2359 * @param dbi debug info
2360 * @param expr the IL assume expression
2362 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2364 switch(expression->kind) {
2365 case EXPR_BINARY_EQUAL:
2366 case EXPR_BINARY_NOTEQUAL:
2367 case EXPR_BINARY_LESS:
2368 case EXPR_BINARY_LESSEQUAL:
2369 case EXPR_BINARY_GREATER:
2370 case EXPR_BINARY_GREATEREQUAL:
2371 return handle_assume_compare(dbi, &expression->binary);
2377 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2378 type_t *from_type, type_t *type)
2380 type = skip_typeref(type);
2381 if (type == type_void) {
2382 /* make sure firm type is constructed */
2383 (void) get_ir_type(type);
2386 if (!is_type_scalar(type)) {
2387 /* make sure firm type is constructed */
2388 (void) get_ir_type(type);
2392 from_type = skip_typeref(from_type);
2393 ir_mode *mode = get_ir_mode_storage(type);
2394 /* check for conversion from / to __based types */
2395 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2396 const variable_t *from_var = from_type->pointer.base_variable;
2397 const variable_t *to_var = type->pointer.base_variable;
2398 if (from_var != to_var) {
2399 if (from_var != NULL) {
2400 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2401 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2402 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2404 if (to_var != NULL) {
2405 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2406 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2407 value_node = new_d_Sub(dbgi, value_node, base, mode);
2412 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2413 /* bool adjustments (we save a mode_Bu, but have to temporarily
2414 * convert to mode_b so we only get a 0/1 value */
2415 value_node = create_conv(dbgi, value_node, mode_b);
2418 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2419 ir_node *node = create_conv(dbgi, value_node, mode);
2420 node = do_strict_conv(dbgi, node);
2421 node = create_conv(dbgi, node, mode_arith);
2426 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2428 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2429 type_t *type = skip_typeref(expression->base.type);
2431 const expression_t *value = expression->value;
2433 switch(expression->base.kind) {
2434 case EXPR_UNARY_TAKE_ADDRESS:
2435 return expression_to_addr(value);
2437 case EXPR_UNARY_NEGATE: {
2438 ir_node *value_node = expression_to_firm(value);
2439 ir_mode *mode = get_ir_mode_arithmetic(type);
2440 return new_d_Minus(dbgi, value_node, mode);
2442 case EXPR_UNARY_PLUS:
2443 return expression_to_firm(value);
2444 case EXPR_UNARY_BITWISE_NEGATE: {
2445 ir_node *value_node = expression_to_firm(value);
2446 ir_mode *mode = get_ir_mode_arithmetic(type);
2447 return new_d_Not(dbgi, value_node, mode);
2449 case EXPR_UNARY_NOT: {
2450 ir_node *value_node = _expression_to_firm(value);
2451 value_node = create_conv(dbgi, value_node, mode_b);
2452 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2455 case EXPR_UNARY_DEREFERENCE: {
2456 ir_node *value_node = expression_to_firm(value);
2457 type_t *value_type = skip_typeref(value->base.type);
2458 assert(is_type_pointer(value_type));
2460 /* check for __based */
2461 const variable_t *const base_var = value_type->pointer.base_variable;
2462 if (base_var != NULL) {
2463 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2464 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2465 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2467 type_t *points_to = value_type->pointer.points_to;
2468 return deref_address(dbgi, points_to, value_node);
2470 case EXPR_UNARY_POSTFIX_INCREMENT:
2471 case EXPR_UNARY_POSTFIX_DECREMENT:
2472 case EXPR_UNARY_PREFIX_INCREMENT:
2473 case EXPR_UNARY_PREFIX_DECREMENT:
2474 return create_incdec(expression);
2475 case EXPR_UNARY_CAST: {
2476 ir_node *value_node = expression_to_firm(value);
2477 type_t *from_type = value->base.type;
2478 return create_cast(dbgi, value_node, from_type, type);
2480 case EXPR_UNARY_ASSUME:
2481 return handle_assume(dbgi, value);
2486 panic("invalid UNEXPR type found");
2490 * produces a 0/1 depending of the value of a mode_b node
2492 static ir_node *produce_condition_result(const expression_t *expression,
2493 ir_mode *mode, dbg_info *dbgi)
2495 ir_node *const one_block = new_immBlock();
2496 ir_node *const zero_block = new_immBlock();
2497 create_condition_evaluation(expression, one_block, zero_block);
2498 mature_immBlock(one_block);
2499 mature_immBlock(zero_block);
2501 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2502 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2503 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2504 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2505 set_cur_block(block);
2507 ir_node *const one = new_Const(get_mode_one(mode));
2508 ir_node *const zero = new_Const(get_mode_null(mode));
2509 ir_node *const in[2] = { one, zero };
2510 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2515 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2516 ir_node *value, type_t *type)
2518 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2519 assert(is_type_pointer(type));
2520 pointer_type_t *const pointer_type = &type->pointer;
2521 type_t *const points_to = skip_typeref(pointer_type->points_to);
2522 ir_node * elem_size = get_type_size_node(points_to);
2523 elem_size = create_conv(dbgi, elem_size, mode);
2524 value = create_conv(dbgi, value, mode);
2525 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2529 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2530 ir_node *left, ir_node *right)
2533 type_t *type_left = skip_typeref(expression->left->base.type);
2534 type_t *type_right = skip_typeref(expression->right->base.type);
2536 expression_kind_t kind = expression->base.kind;
2539 case EXPR_BINARY_SHIFTLEFT:
2540 case EXPR_BINARY_SHIFTRIGHT:
2541 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2542 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2543 mode = get_ir_mode_arithmetic(expression->base.type);
2544 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2547 case EXPR_BINARY_SUB:
2548 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2549 const pointer_type_t *const ptr_type = &type_left->pointer;
2551 mode = get_ir_mode_arithmetic(expression->base.type);
2552 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2553 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2554 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2555 ir_node *const no_mem = new_NoMem();
2556 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2557 mode, op_pin_state_floats);
2558 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2561 case EXPR_BINARY_SUB_ASSIGN:
2562 if (is_type_pointer(type_left)) {
2563 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2564 mode = get_ir_mode_arithmetic(type_left);
2569 case EXPR_BINARY_ADD:
2570 case EXPR_BINARY_ADD_ASSIGN:
2571 if (is_type_pointer(type_left)) {
2572 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2573 mode = get_ir_mode_arithmetic(type_left);
2575 } else if (is_type_pointer(type_right)) {
2576 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2577 mode = get_ir_mode_arithmetic(type_right);
2584 mode = get_ir_mode_arithmetic(type_right);
2585 left = create_conv(dbgi, left, mode);
2590 case EXPR_BINARY_ADD_ASSIGN:
2591 case EXPR_BINARY_ADD:
2592 return new_d_Add(dbgi, left, right, mode);
2593 case EXPR_BINARY_SUB_ASSIGN:
2594 case EXPR_BINARY_SUB:
2595 return new_d_Sub(dbgi, left, right, mode);
2596 case EXPR_BINARY_MUL_ASSIGN:
2597 case EXPR_BINARY_MUL:
2598 return new_d_Mul(dbgi, left, right, mode);
2599 case EXPR_BINARY_BITWISE_AND:
2600 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2601 return new_d_And(dbgi, left, right, mode);
2602 case EXPR_BINARY_BITWISE_OR:
2603 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2604 return new_d_Or(dbgi, left, right, mode);
2605 case EXPR_BINARY_BITWISE_XOR:
2606 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2607 return new_d_Eor(dbgi, left, right, mode);
2608 case EXPR_BINARY_SHIFTLEFT:
2609 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2610 return new_d_Shl(dbgi, left, right, mode);
2611 case EXPR_BINARY_SHIFTRIGHT:
2612 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2613 if (mode_is_signed(mode)) {
2614 return new_d_Shrs(dbgi, left, right, mode);
2616 return new_d_Shr(dbgi, left, right, mode);
2618 case EXPR_BINARY_DIV:
2619 case EXPR_BINARY_DIV_ASSIGN: {
2620 ir_node *pin = new_Pin(new_NoMem());
2621 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2622 op_pin_state_floats);
2623 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2626 case EXPR_BINARY_MOD:
2627 case EXPR_BINARY_MOD_ASSIGN: {
2628 ir_node *pin = new_Pin(new_NoMem());
2629 assert(!mode_is_float(mode));
2630 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2631 op_pin_state_floats);
2632 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2636 panic("unexpected expression kind");
2640 static ir_node *create_lazy_op(const binary_expression_t *expression)
2642 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2643 type_t *type = skip_typeref(expression->base.type);
2644 ir_mode *mode = get_ir_mode_arithmetic(type);
2646 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2647 bool val = fold_constant_to_bool(expression->left);
2648 expression_kind_t ekind = expression->base.kind;
2649 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2650 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2652 return new_Const(get_mode_null(mode));
2656 return new_Const(get_mode_one(mode));
2660 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2661 bool valr = fold_constant_to_bool(expression->right);
2662 return create_Const_from_bool(mode, valr);
2665 return produce_condition_result(expression->right, mode, dbgi);
2668 return produce_condition_result((const expression_t*) expression, mode,
2672 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2673 ir_node *right, ir_mode *mode);
2675 static ir_node *create_assign_binop(const binary_expression_t *expression)
2677 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2678 const expression_t *left_expr = expression->left;
2679 type_t *type = skip_typeref(left_expr->base.type);
2680 ir_node *right = expression_to_firm(expression->right);
2681 ir_node *left_addr = expression_to_addr(left_expr);
2682 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2683 ir_node *result = create_op(dbgi, expression, left, right);
2685 result = create_cast(dbgi, result, expression->right->base.type, type);
2686 result = do_strict_conv(dbgi, result);
2688 result = set_value_for_expression_addr(left_expr, result, left_addr);
2690 if (!is_type_compound(type)) {
2691 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2692 result = create_conv(dbgi, result, mode_arithmetic);
2697 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2699 expression_kind_t kind = expression->base.kind;
2702 case EXPR_BINARY_EQUAL:
2703 case EXPR_BINARY_NOTEQUAL:
2704 case EXPR_BINARY_LESS:
2705 case EXPR_BINARY_LESSEQUAL:
2706 case EXPR_BINARY_GREATER:
2707 case EXPR_BINARY_GREATEREQUAL:
2708 case EXPR_BINARY_ISGREATER:
2709 case EXPR_BINARY_ISGREATEREQUAL:
2710 case EXPR_BINARY_ISLESS:
2711 case EXPR_BINARY_ISLESSEQUAL:
2712 case EXPR_BINARY_ISLESSGREATER:
2713 case EXPR_BINARY_ISUNORDERED: {
2714 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2715 ir_node *left = expression_to_firm(expression->left);
2716 ir_node *right = expression_to_firm(expression->right);
2717 ir_relation relation = get_relation(kind);
2718 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2721 case EXPR_BINARY_ASSIGN: {
2722 ir_node *addr = expression_to_addr(expression->left);
2723 ir_node *right = expression_to_firm(expression->right);
2725 = set_value_for_expression_addr(expression->left, right, addr);
2727 type_t *type = skip_typeref(expression->base.type);
2728 if (!is_type_compound(type)) {
2729 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2730 res = create_conv(NULL, res, mode_arithmetic);
2734 case EXPR_BINARY_ADD:
2735 case EXPR_BINARY_SUB:
2736 case EXPR_BINARY_MUL:
2737 case EXPR_BINARY_DIV:
2738 case EXPR_BINARY_MOD:
2739 case EXPR_BINARY_BITWISE_AND:
2740 case EXPR_BINARY_BITWISE_OR:
2741 case EXPR_BINARY_BITWISE_XOR:
2742 case EXPR_BINARY_SHIFTLEFT:
2743 case EXPR_BINARY_SHIFTRIGHT:
2745 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2746 ir_node *left = expression_to_firm(expression->left);
2747 ir_node *right = expression_to_firm(expression->right);
2748 return create_op(dbgi, expression, left, right);
2750 case EXPR_BINARY_LOGICAL_AND:
2751 case EXPR_BINARY_LOGICAL_OR:
2752 return create_lazy_op(expression);
2753 case EXPR_BINARY_COMMA:
2754 /* create side effects of left side */
2755 (void) expression_to_firm(expression->left);
2756 return _expression_to_firm(expression->right);
2758 case EXPR_BINARY_ADD_ASSIGN:
2759 case EXPR_BINARY_SUB_ASSIGN:
2760 case EXPR_BINARY_MUL_ASSIGN:
2761 case EXPR_BINARY_MOD_ASSIGN:
2762 case EXPR_BINARY_DIV_ASSIGN:
2763 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2764 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2765 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2766 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2767 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2768 return create_assign_binop(expression);
2770 panic("TODO binexpr type");
2774 static ir_node *array_access_addr(const array_access_expression_t *expression)
2776 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2777 ir_node *base_addr = expression_to_firm(expression->array_ref);
2778 ir_node *offset = expression_to_firm(expression->index);
2779 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2780 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2781 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2786 static ir_node *array_access_to_firm(
2787 const array_access_expression_t *expression)
2789 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2790 ir_node *addr = array_access_addr(expression);
2791 type_t *type = revert_automatic_type_conversion(
2792 (const expression_t*) expression);
2793 type = skip_typeref(type);
2795 return deref_address(dbgi, type, addr);
2798 static long get_offsetof_offset(const offsetof_expression_t *expression)
2800 type_t *orig_type = expression->type;
2803 designator_t *designator = expression->designator;
2804 for ( ; designator != NULL; designator = designator->next) {
2805 type_t *type = skip_typeref(orig_type);
2806 /* be sure the type is constructed */
2807 (void) get_ir_type(type);
2809 if (designator->symbol != NULL) {
2810 assert(is_type_compound(type));
2811 symbol_t *symbol = designator->symbol;
2813 compound_t *compound = type->compound.compound;
2814 entity_t *iter = compound->members.entities;
2815 for ( ; iter != NULL; iter = iter->base.next) {
2816 if (iter->base.symbol == symbol) {
2820 assert(iter != NULL);
2822 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2823 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2824 offset += get_entity_offset(iter->compound_member.entity);
2826 orig_type = iter->declaration.type;
2828 expression_t *array_index = designator->array_index;
2829 assert(designator->array_index != NULL);
2830 assert(is_type_array(type));
2832 long index = fold_constant_to_int(array_index);
2833 ir_type *arr_type = get_ir_type(type);
2834 ir_type *elem_type = get_array_element_type(arr_type);
2835 long elem_size = get_type_size_bytes(elem_type);
2837 offset += index * elem_size;
2839 orig_type = type->array.element_type;
2846 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2848 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2849 long offset = get_offsetof_offset(expression);
2850 ir_tarval *tv = new_tarval_from_long(offset, mode);
2851 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2853 return new_d_Const(dbgi, tv);
2856 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2857 ir_entity *entity, type_t *type);
2858 static ir_initializer_t *create_ir_initializer(
2859 const initializer_t *initializer, type_t *type);
2861 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2862 initializer_t *initializer,
2865 /* create the ir_initializer */
2866 ir_graph *const old_current_ir_graph = current_ir_graph;
2867 current_ir_graph = get_const_code_irg();
2869 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2871 assert(current_ir_graph == get_const_code_irg());
2872 current_ir_graph = old_current_ir_graph;
2874 ident *const id = id_unique("initializer.%u");
2875 ir_type *const irtype = get_ir_type(type);
2876 ir_type *const global_type = get_glob_type();
2877 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2878 set_entity_ld_ident(entity, id);
2879 set_entity_visibility(entity, ir_visibility_private);
2880 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2881 set_entity_initializer(entity, irinitializer);
2885 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2887 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2888 type_t *type = expression->type;
2889 initializer_t *initializer = expression->initializer;
2891 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2892 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2893 return create_symconst(dbgi, entity);
2895 /* create an entity on the stack */
2896 ident *const id = id_unique("CompLit.%u");
2897 ir_type *const irtype = get_ir_type(type);
2898 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2900 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2901 set_entity_ld_ident(entity, id);
2903 /* create initialisation code */
2904 create_local_initializer(initializer, dbgi, entity, type);
2906 /* create a sel for the compound literal address */
2907 ir_node *frame = get_irg_frame(current_ir_graph);
2908 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2913 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2915 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2916 type_t *const type = expr->type;
2917 ir_node *const addr = compound_literal_addr(expr);
2918 return deref_address(dbgi, type, addr);
2922 * Transform a sizeof expression into Firm code.
2924 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2926 type_t *const type = skip_typeref(expression->type);
2927 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2928 if (is_type_array(type) && type->array.is_vla
2929 && expression->tp_expression != NULL) {
2930 expression_to_firm(expression->tp_expression);
2932 /* strange gnu extensions: sizeof(function) == 1 */
2933 if (is_type_function(type)) {
2934 ir_mode *mode = get_ir_mode_storage(type_size_t);
2935 return new_Const(get_mode_one(mode));
2938 return get_type_size_node(type);
2941 static entity_t *get_expression_entity(const expression_t *expression)
2943 if (expression->kind != EXPR_REFERENCE)
2946 return expression->reference.entity;
2949 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2951 switch(entity->kind) {
2952 case DECLARATION_KIND_CASES:
2953 return entity->declaration.alignment;
2956 return entity->compound.alignment;
2957 case ENTITY_TYPEDEF:
2958 return entity->typedefe.alignment;
2966 * Transform an alignof expression into Firm code.
2968 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2970 unsigned alignment = 0;
2972 const expression_t *tp_expression = expression->tp_expression;
2973 if (tp_expression != NULL) {
2974 entity_t *entity = get_expression_entity(tp_expression);
2975 if (entity != NULL) {
2976 if (entity->kind == ENTITY_FUNCTION) {
2977 /* a gnu-extension */
2980 alignment = get_cparser_entity_alignment(entity);
2985 if (alignment == 0) {
2986 type_t *type = expression->type;
2987 alignment = get_type_alignment(type);
2990 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2991 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2992 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2993 return new_d_Const(dbgi, tv);
2996 static void init_ir_types(void);
2998 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
3000 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
3002 bool constant_folding_old = constant_folding;
3003 constant_folding = true;
3004 int old_optimize = get_optimize();
3005 int old_constant_folding = get_opt_constant_folding();
3007 set_opt_constant_folding(1);
3011 ir_graph *old_current_ir_graph = current_ir_graph;
3012 current_ir_graph = get_const_code_irg();
3014 ir_node *cnst = expression_to_firm(expression);
3015 current_ir_graph = old_current_ir_graph;
3016 set_optimize(old_optimize);
3017 set_opt_constant_folding(old_constant_folding);
3019 if (!is_Const(cnst)) {
3020 panic("couldn't fold constant");
3023 constant_folding = constant_folding_old;
3025 return get_Const_tarval(cnst);
3028 /* this function is only used in parser.c, but it relies on libfirm functionality */
3029 bool constant_is_negative(const expression_t *expression)
3031 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
3032 ir_tarval *tv = fold_constant_to_tarval(expression);
3033 return tarval_is_negative(tv);
3036 long fold_constant_to_int(const expression_t *expression)
3038 if (expression->kind == EXPR_ERROR)
3041 ir_tarval *tv = fold_constant_to_tarval(expression);
3042 if (!tarval_is_long(tv)) {
3043 panic("result of constant folding is not integer");
3046 return get_tarval_long(tv);
3049 bool fold_constant_to_bool(const expression_t *expression)
3051 if (expression->kind == EXPR_ERROR)
3053 ir_tarval *tv = fold_constant_to_tarval(expression);
3054 return !tarval_is_null(tv);
3057 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3059 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3061 /* first try to fold a constant condition */
3062 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3063 bool val = fold_constant_to_bool(expression->condition);
3065 expression_t *true_expression = expression->true_expression;
3066 if (true_expression == NULL)
3067 true_expression = expression->condition;
3068 return expression_to_firm(true_expression);
3070 return expression_to_firm(expression->false_expression);
3074 ir_node *const true_block = new_immBlock();
3075 ir_node *const false_block = new_immBlock();
3076 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3077 mature_immBlock(true_block);
3078 mature_immBlock(false_block);
3080 set_cur_block(true_block);
3082 if (expression->true_expression != NULL) {
3083 true_val = expression_to_firm(expression->true_expression);
3084 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3085 true_val = cond_expr;
3087 /* Condition ended with a short circuit (&&, ||, !) operation or a
3088 * comparison. Generate a "1" as value for the true branch. */
3089 true_val = new_Const(get_mode_one(mode_Is));
3091 ir_node *const true_jmp = new_d_Jmp(dbgi);
3093 set_cur_block(false_block);
3094 ir_node *const false_val = expression_to_firm(expression->false_expression);
3095 ir_node *const false_jmp = new_d_Jmp(dbgi);
3097 /* create the common block */
3098 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3099 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3100 set_cur_block(block);
3102 /* TODO improve static semantics, so either both or no values are NULL */
3103 if (true_val == NULL || false_val == NULL)
3106 ir_node *const in[2] = { true_val, false_val };
3107 type_t *const type = skip_typeref(expression->base.type);
3109 if (is_type_compound(type)) {
3112 mode = get_ir_mode_arithmetic(type);
3114 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3120 * Returns an IR-node representing the address of a field.
3122 static ir_node *select_addr(const select_expression_t *expression)
3124 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3126 construct_select_compound(expression);
3128 ir_node *compound_addr = expression_to_firm(expression->compound);
3130 entity_t *entry = expression->compound_entry;
3131 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3132 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3134 if (constant_folding) {
3135 ir_mode *mode = get_irn_mode(compound_addr);
3136 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3137 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3138 return new_d_Add(dbgi, compound_addr, ofs, mode);
3140 ir_entity *irentity = entry->compound_member.entity;
3141 assert(irentity != NULL);
3142 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3146 static ir_node *select_to_firm(const select_expression_t *expression)
3148 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3149 ir_node *addr = select_addr(expression);
3150 type_t *type = revert_automatic_type_conversion(
3151 (const expression_t*) expression);
3152 type = skip_typeref(type);
3154 entity_t *entry = expression->compound_entry;
3155 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3157 if (entry->compound_member.bitfield) {
3158 return bitfield_extract_to_firm(expression, addr);
3161 return deref_address(dbgi, type, addr);
3164 /* Values returned by __builtin_classify_type. */
3165 typedef enum gcc_type_class
3171 enumeral_type_class,
3174 reference_type_class,
3178 function_type_class,
3189 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3191 type_t *type = expr->type_expression->base.type;
3193 /* FIXME gcc returns different values depending on whether compiling C or C++
3194 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3197 type = skip_typeref(type);
3198 switch (type->kind) {
3200 const atomic_type_t *const atomic_type = &type->atomic;
3201 switch (atomic_type->akind) {
3202 /* should not be reached */
3203 case ATOMIC_TYPE_INVALID:
3207 /* gcc cannot do that */
3208 case ATOMIC_TYPE_VOID:
3209 tc = void_type_class;
3212 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3213 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3214 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3215 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3216 case ATOMIC_TYPE_SHORT:
3217 case ATOMIC_TYPE_USHORT:
3218 case ATOMIC_TYPE_INT:
3219 case ATOMIC_TYPE_UINT:
3220 case ATOMIC_TYPE_LONG:
3221 case ATOMIC_TYPE_ULONG:
3222 case ATOMIC_TYPE_LONGLONG:
3223 case ATOMIC_TYPE_ULONGLONG:
3224 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3225 tc = integer_type_class;
3228 case ATOMIC_TYPE_FLOAT:
3229 case ATOMIC_TYPE_DOUBLE:
3230 case ATOMIC_TYPE_LONG_DOUBLE:
3231 tc = real_type_class;
3234 panic("Unexpected atomic type in classify_type_to_firm().");
3237 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3238 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3239 case TYPE_ARRAY: /* gcc handles this as pointer */
3240 case TYPE_FUNCTION: /* gcc handles this as pointer */
3241 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3242 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3243 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3245 /* gcc handles this as integer */
3246 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3248 /* gcc classifies the referenced type */
3249 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3251 /* typedef/typeof should be skipped already */
3257 panic("unexpected TYPE classify_type_to_firm().");
3261 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3262 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3263 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3264 return new_d_Const(dbgi, tv);
3267 static ir_node *function_name_to_firm(
3268 const funcname_expression_t *const expr)
3270 switch(expr->kind) {
3271 case FUNCNAME_FUNCTION:
3272 case FUNCNAME_PRETTY_FUNCTION:
3273 case FUNCNAME_FUNCDNAME:
3274 if (current_function_name == NULL) {
3275 const source_position_t *const src_pos = &expr->base.source_position;
3276 const char *name = current_function_entity->base.symbol->string;
3277 const string_t string = { name, strlen(name) + 1 };
3278 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3280 return current_function_name;
3281 case FUNCNAME_FUNCSIG:
3282 if (current_funcsig == NULL) {
3283 const source_position_t *const src_pos = &expr->base.source_position;
3284 ir_entity *ent = get_irg_entity(current_ir_graph);
3285 const char *const name = get_entity_ld_name(ent);
3286 const string_t string = { name, strlen(name) + 1 };
3287 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3289 return current_funcsig;
3291 panic("Unsupported function name");
3294 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3296 statement_t *statement = expr->statement;
3298 assert(statement->kind == STATEMENT_COMPOUND);
3299 return compound_statement_to_firm(&statement->compound);
3302 static ir_node *va_start_expression_to_firm(
3303 const va_start_expression_t *const expr)
3305 ir_entity *param_ent = current_vararg_entity;
3306 if (param_ent == NULL) {
3307 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3308 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3309 ir_type *const param_type = get_unknown_type();
3310 param_ent = new_parameter_entity(frame_type, n, param_type);
3311 current_vararg_entity = param_ent;
3314 ir_node *const frame = get_irg_frame(current_ir_graph);
3315 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3316 ir_node *const no_mem = new_NoMem();
3317 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3319 set_value_for_expression(expr->ap, arg_sel);
3324 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3326 type_t *const type = expr->base.type;
3327 expression_t *const ap_expr = expr->ap;
3328 ir_node *const ap_addr = expression_to_addr(ap_expr);
3329 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3330 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3331 ir_node *const res = deref_address(dbgi, type, ap);
3333 ir_node *const cnst = get_type_size_node(expr->base.type);
3334 ir_mode *const mode = get_irn_mode(cnst);
3335 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3336 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3337 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3338 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3339 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3341 set_value_for_expression_addr(ap_expr, add, ap_addr);
3347 * Generate Firm for a va_copy expression.
3349 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3351 ir_node *const src = expression_to_firm(expr->src);
3352 set_value_for_expression(expr->dst, src);
3356 static ir_node *dereference_addr(const unary_expression_t *const expression)
3358 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3359 return expression_to_firm(expression->value);
3363 * Returns a IR-node representing an lvalue of the given expression.
3365 static ir_node *expression_to_addr(const expression_t *expression)
3367 switch(expression->kind) {
3368 case EXPR_ARRAY_ACCESS:
3369 return array_access_addr(&expression->array_access);
3371 return call_expression_to_firm(&expression->call);
3372 case EXPR_COMPOUND_LITERAL:
3373 return compound_literal_addr(&expression->compound_literal);
3374 case EXPR_REFERENCE:
3375 return reference_addr(&expression->reference);
3377 return select_addr(&expression->select);
3378 case EXPR_UNARY_DEREFERENCE:
3379 return dereference_addr(&expression->unary);
3383 panic("trying to get address of non-lvalue");
3386 static ir_node *builtin_constant_to_firm(
3387 const builtin_constant_expression_t *expression)
3389 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3390 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3391 return create_Const_from_bool(mode, v);
3394 static ir_node *builtin_types_compatible_to_firm(
3395 const builtin_types_compatible_expression_t *expression)
3397 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3398 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3399 bool const value = types_compatible(left, right);
3400 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3401 return create_Const_from_bool(mode, value);
3404 static ir_node *get_label_block(label_t *label)
3406 if (label->block != NULL)
3407 return label->block;
3409 /* beware: might be called from create initializer with current_ir_graph
3410 * set to const_code_irg. */
3411 ir_graph *rem = current_ir_graph;
3412 current_ir_graph = current_function;
3414 ir_node *block = new_immBlock();
3416 label->block = block;
3418 ARR_APP1(label_t *, all_labels, label);
3420 current_ir_graph = rem;
3425 * Pointer to a label. This is used for the
3426 * GNU address-of-label extension.
3428 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3430 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3431 ir_node *block = get_label_block(label->label);
3432 ir_entity *entity = create_Block_entity(block);
3434 symconst_symbol value;
3435 value.entity_p = entity;
3436 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3439 static ir_node *error_to_firm(const expression_t *expression)
3441 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3442 return new_Bad(mode);
3446 * creates firm nodes for an expression. The difference between this function
3447 * and expression_to_firm is, that this version might produce mode_b nodes
3448 * instead of mode_Is.
3450 static ir_node *_expression_to_firm(const expression_t *expression)
3453 if (!constant_folding) {
3454 assert(!expression->base.transformed);
3455 ((expression_t*) expression)->base.transformed = true;
3459 switch (expression->kind) {
3460 case EXPR_LITERAL_CASES:
3461 return literal_to_firm(&expression->literal);
3462 case EXPR_STRING_LITERAL:
3463 return string_to_firm(&expression->base.source_position, "str.%u",
3464 &expression->literal.value);
3465 case EXPR_WIDE_STRING_LITERAL:
3466 return wide_string_literal_to_firm(&expression->string_literal);
3467 case EXPR_REFERENCE:
3468 return reference_expression_to_firm(&expression->reference);
3469 case EXPR_REFERENCE_ENUM_VALUE:
3470 return reference_expression_enum_value_to_firm(&expression->reference);
3472 return call_expression_to_firm(&expression->call);
3473 case EXPR_UNARY_CASES:
3474 return unary_expression_to_firm(&expression->unary);
3475 case EXPR_BINARY_CASES:
3476 return binary_expression_to_firm(&expression->binary);
3477 case EXPR_ARRAY_ACCESS:
3478 return array_access_to_firm(&expression->array_access);
3480 return sizeof_to_firm(&expression->typeprop);
3482 return alignof_to_firm(&expression->typeprop);
3483 case EXPR_CONDITIONAL:
3484 return conditional_to_firm(&expression->conditional);
3486 return select_to_firm(&expression->select);
3487 case EXPR_CLASSIFY_TYPE:
3488 return classify_type_to_firm(&expression->classify_type);
3490 return function_name_to_firm(&expression->funcname);
3491 case EXPR_STATEMENT:
3492 return statement_expression_to_firm(&expression->statement);
3494 return va_start_expression_to_firm(&expression->va_starte);
3496 return va_arg_expression_to_firm(&expression->va_arge);
3498 return va_copy_expression_to_firm(&expression->va_copye);
3499 case EXPR_BUILTIN_CONSTANT_P:
3500 return builtin_constant_to_firm(&expression->builtin_constant);
3501 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3502 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3504 return offsetof_to_firm(&expression->offsetofe);
3505 case EXPR_COMPOUND_LITERAL:
3506 return compound_literal_to_firm(&expression->compound_literal);
3507 case EXPR_LABEL_ADDRESS:
3508 return label_address_to_firm(&expression->label_address);
3511 return error_to_firm(expression);
3513 panic("invalid expression found");
3517 * Check if a given expression is a GNU __builtin_expect() call.
3519 static bool is_builtin_expect(const expression_t *expression)
3521 if (expression->kind != EXPR_CALL)
3524 expression_t *function = expression->call.function;
3525 if (function->kind != EXPR_REFERENCE)
3527 reference_expression_t *ref = &function->reference;
3528 if (ref->entity->kind != ENTITY_FUNCTION ||
3529 ref->entity->function.btk != BUILTIN_EXPECT)
3535 static bool produces_mode_b(const expression_t *expression)
3537 switch (expression->kind) {
3538 case EXPR_BINARY_EQUAL:
3539 case EXPR_BINARY_NOTEQUAL:
3540 case EXPR_BINARY_LESS:
3541 case EXPR_BINARY_LESSEQUAL:
3542 case EXPR_BINARY_GREATER:
3543 case EXPR_BINARY_GREATEREQUAL:
3544 case EXPR_BINARY_ISGREATER:
3545 case EXPR_BINARY_ISGREATEREQUAL:
3546 case EXPR_BINARY_ISLESS:
3547 case EXPR_BINARY_ISLESSEQUAL:
3548 case EXPR_BINARY_ISLESSGREATER:
3549 case EXPR_BINARY_ISUNORDERED:
3550 case EXPR_UNARY_NOT:
3554 if (is_builtin_expect(expression)) {
3555 expression_t *argument = expression->call.arguments->expression;
3556 return produces_mode_b(argument);
3559 case EXPR_BINARY_COMMA:
3560 return produces_mode_b(expression->binary.right);
3567 static ir_node *expression_to_firm(const expression_t *expression)
3569 if (!produces_mode_b(expression)) {
3570 ir_node *res = _expression_to_firm(expression);
3571 assert(res == NULL || get_irn_mode(res) != mode_b);
3575 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3576 bool const constant_folding_old = constant_folding;
3577 constant_folding = true;
3578 ir_node *res = _expression_to_firm(expression);
3579 constant_folding = constant_folding_old;
3580 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3581 assert(is_Const(res));
3582 return create_Const_from_bool(mode, !is_Const_null(res));
3585 /* we have to produce a 0/1 from the mode_b expression */
3586 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3587 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3588 return produce_condition_result(expression, mode, dbgi);
3592 * create a short-circuit expression evaluation that tries to construct
3593 * efficient control flow structures for &&, || and ! expressions
3595 static ir_node *create_condition_evaluation(const expression_t *expression,
3596 ir_node *true_block,
3597 ir_node *false_block)
3599 switch(expression->kind) {
3600 case EXPR_UNARY_NOT: {
3601 const unary_expression_t *unary_expression = &expression->unary;
3602 create_condition_evaluation(unary_expression->value, false_block,
3606 case EXPR_BINARY_LOGICAL_AND: {
3607 const binary_expression_t *binary_expression = &expression->binary;
3609 ir_node *extra_block = new_immBlock();
3610 create_condition_evaluation(binary_expression->left, extra_block,
3612 mature_immBlock(extra_block);
3613 set_cur_block(extra_block);
3614 create_condition_evaluation(binary_expression->right, true_block,
3618 case EXPR_BINARY_LOGICAL_OR: {
3619 const binary_expression_t *binary_expression = &expression->binary;
3621 ir_node *extra_block = new_immBlock();
3622 create_condition_evaluation(binary_expression->left, true_block,
3624 mature_immBlock(extra_block);
3625 set_cur_block(extra_block);
3626 create_condition_evaluation(binary_expression->right, true_block,
3634 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3635 ir_node *cond_expr = _expression_to_firm(expression);
3636 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3637 ir_node *cond = new_d_Cond(dbgi, condition);
3638 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3639 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3641 /* set branch prediction info based on __builtin_expect */
3642 if (is_builtin_expect(expression) && is_Cond(cond)) {
3643 call_argument_t *argument = expression->call.arguments->next;
3644 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3645 bool const cnst = fold_constant_to_bool(argument->expression);
3646 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3647 set_Cond_jmp_pred(cond, pred);
3651 add_immBlock_pred(true_block, true_proj);
3652 add_immBlock_pred(false_block, false_proj);
3654 set_unreachable_now();
3658 static void create_variable_entity(entity_t *variable,
3659 declaration_kind_t declaration_kind,
3660 ir_type *parent_type)
3662 assert(variable->kind == ENTITY_VARIABLE);
3663 type_t *type = skip_typeref(variable->declaration.type);
3665 ident *const id = new_id_from_str(variable->base.symbol->string);
3666 ir_type *const irtype = get_ir_type(type);
3667 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3668 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3669 unsigned alignment = variable->declaration.alignment;
3671 set_entity_alignment(irentity, alignment);
3673 handle_decl_modifiers(irentity, variable);
3675 variable->declaration.kind = (unsigned char) declaration_kind;
3676 variable->variable.v.entity = irentity;
3677 set_entity_ld_ident(irentity, create_ld_ident(variable));
3679 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3680 set_entity_volatility(irentity, volatility_is_volatile);
3685 typedef struct type_path_entry_t type_path_entry_t;
3686 struct type_path_entry_t {
3688 ir_initializer_t *initializer;
3690 entity_t *compound_entry;
3693 typedef struct type_path_t type_path_t;
3694 struct type_path_t {
3695 type_path_entry_t *path;
3700 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3702 size_t len = ARR_LEN(path->path);
3704 for (size_t i = 0; i < len; ++i) {
3705 const type_path_entry_t *entry = & path->path[i];
3707 type_t *type = skip_typeref(entry->type);
3708 if (is_type_compound(type)) {
3709 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3710 } else if (is_type_array(type)) {
3711 fprintf(stderr, "[%u]", (unsigned) entry->index);
3713 fprintf(stderr, "-INVALID-");
3716 fprintf(stderr, " (");
3717 print_type(path->top_type);
3718 fprintf(stderr, ")");
3721 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3723 size_t len = ARR_LEN(path->path);
3725 return & path->path[len-1];
3728 static type_path_entry_t *append_to_type_path(type_path_t *path)
3730 size_t len = ARR_LEN(path->path);
3731 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3733 type_path_entry_t *result = & path->path[len];
3734 memset(result, 0, sizeof(result[0]));
3738 static size_t get_compound_member_count(const compound_type_t *type)
3740 compound_t *compound = type->compound;
3741 size_t n_members = 0;
3742 entity_t *member = compound->members.entities;
3743 for ( ; member != NULL; member = member->base.next) {
3750 static ir_initializer_t *get_initializer_entry(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 if (ARR_LEN(path->path) == 0) {
3760 type_path_entry_t *top = get_type_path_top(path);
3761 ir_initializer_t *initializer = top->initializer;
3762 return get_initializer_compound_value(initializer, top->index);
3766 static void descend_into_subtype(type_path_t *path)
3768 type_t *orig_top_type = path->top_type;
3769 type_t *top_type = skip_typeref(orig_top_type);
3771 assert(is_type_compound(top_type) || is_type_array(top_type));
3773 ir_initializer_t *initializer = get_initializer_entry(path);
3775 type_path_entry_t *top = append_to_type_path(path);
3776 top->type = top_type;
3780 if (is_type_compound(top_type)) {
3781 compound_t *const compound = top_type->compound.compound;
3782 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3784 top->compound_entry = entry;
3786 len = get_compound_member_count(&top_type->compound);
3787 if (entry != NULL) {
3788 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3789 path->top_type = entry->declaration.type;
3792 assert(is_type_array(top_type));
3793 assert(top_type->array.size > 0);
3796 path->top_type = top_type->array.element_type;
3797 len = top_type->array.size;
3799 if (initializer == NULL
3800 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3801 initializer = create_initializer_compound(len);
3802 /* we have to set the entry at the 2nd latest path entry... */
3803 size_t path_len = ARR_LEN(path->path);
3804 assert(path_len >= 1);
3806 type_path_entry_t *entry = & path->path[path_len-2];
3807 ir_initializer_t *tinitializer = entry->initializer;
3808 set_initializer_compound_value(tinitializer, entry->index,
3812 top->initializer = initializer;
3815 static void ascend_from_subtype(type_path_t *path)
3817 type_path_entry_t *top = get_type_path_top(path);
3819 path->top_type = top->type;
3821 size_t len = ARR_LEN(path->path);
3822 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3825 static void walk_designator(type_path_t *path, const designator_t *designator)
3827 /* designators start at current object type */
3828 ARR_RESIZE(type_path_entry_t, path->path, 1);
3830 for ( ; designator != NULL; designator = designator->next) {
3831 type_path_entry_t *top = get_type_path_top(path);
3832 type_t *orig_type = top->type;
3833 type_t *type = skip_typeref(orig_type);
3835 if (designator->symbol != NULL) {
3836 assert(is_type_compound(type));
3838 symbol_t *symbol = designator->symbol;
3840 compound_t *compound = type->compound.compound;
3841 entity_t *iter = compound->members.entities;
3842 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3843 if (iter->base.symbol == symbol) {
3844 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3848 assert(iter != NULL);
3850 /* revert previous initialisations of other union elements */
3851 if (type->kind == TYPE_COMPOUND_UNION) {
3852 ir_initializer_t *initializer = top->initializer;
3853 if (initializer != NULL
3854 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3855 /* are we writing to a new element? */
3856 ir_initializer_t *oldi
3857 = get_initializer_compound_value(initializer, index);
3858 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3859 /* clear initializer */
3861 = get_initializer_compound_n_entries(initializer);
3862 ir_initializer_t *nulli = get_initializer_null();
3863 for (size_t i = 0; i < len; ++i) {
3864 set_initializer_compound_value(initializer, i,
3871 top->type = orig_type;
3872 top->compound_entry = iter;
3874 orig_type = iter->declaration.type;
3876 expression_t *array_index = designator->array_index;
3877 assert(designator->array_index != NULL);
3878 assert(is_type_array(type));
3880 long index = fold_constant_to_int(array_index);
3883 if (type->array.size_constant) {
3884 long array_size = type->array.size;
3885 assert(index < array_size);
3889 top->type = orig_type;
3890 top->index = (size_t) index;
3891 orig_type = type->array.element_type;
3893 path->top_type = orig_type;
3895 if (designator->next != NULL) {
3896 descend_into_subtype(path);
3900 path->invalid = false;
3903 static void advance_current_object(type_path_t *path)
3905 if (path->invalid) {
3906 /* TODO: handle this... */
3907 panic("invalid initializer in ast2firm (excessive elements)");
3910 type_path_entry_t *top = get_type_path_top(path);
3912 type_t *type = skip_typeref(top->type);
3913 if (is_type_union(type)) {
3914 /* only the first element is initialized in unions */
3915 top->compound_entry = NULL;
3916 } else if (is_type_struct(type)) {
3917 entity_t *entry = top->compound_entry;
3920 entry = skip_unnamed_bitfields(entry->base.next);
3921 top->compound_entry = entry;
3922 if (entry != NULL) {
3923 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3924 path->top_type = entry->declaration.type;
3928 assert(is_type_array(type));
3931 if (!type->array.size_constant || top->index < type->array.size) {
3936 /* we're past the last member of the current sub-aggregate, try if we
3937 * can ascend in the type hierarchy and continue with another subobject */
3938 size_t len = ARR_LEN(path->path);
3941 ascend_from_subtype(path);
3942 advance_current_object(path);
3944 path->invalid = true;
3949 static ir_initializer_t *create_ir_initializer_value(
3950 const initializer_value_t *initializer)
3952 if (is_type_compound(initializer->value->base.type)) {
3953 panic("initializer creation for compounds not implemented yet");
3955 type_t *type = initializer->value->base.type;
3956 expression_t *expr = initializer->value;
3957 ir_node *value = expression_to_firm(expr);
3958 ir_mode *mode = get_ir_mode_storage(type);
3959 value = create_conv(NULL, value, mode);
3960 return create_initializer_const(value);
3963 /** test wether type can be initialized by a string constant */
3964 static bool is_string_type(type_t *type)
3967 if (is_type_pointer(type)) {
3968 inner = skip_typeref(type->pointer.points_to);
3969 } else if(is_type_array(type)) {
3970 inner = skip_typeref(type->array.element_type);
3975 return is_type_integer(inner);
3978 static ir_initializer_t *create_ir_initializer_list(
3979 const initializer_list_t *initializer, type_t *type)
3982 memset(&path, 0, sizeof(path));
3983 path.top_type = type;
3984 path.path = NEW_ARR_F(type_path_entry_t, 0);
3986 descend_into_subtype(&path);
3988 for (size_t i = 0; i < initializer->len; ++i) {
3989 const initializer_t *sub_initializer = initializer->initializers[i];
3991 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3992 walk_designator(&path, sub_initializer->designator.designator);
3996 if (sub_initializer->kind == INITIALIZER_VALUE) {
3997 /* we might have to descend into types until we're at a scalar
4000 type_t *orig_top_type = path.top_type;
4001 type_t *top_type = skip_typeref(orig_top_type);
4003 if (is_type_scalar(top_type))
4005 descend_into_subtype(&path);
4007 } else if (sub_initializer->kind == INITIALIZER_STRING
4008 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4009 /* we might have to descend into types until we're at a scalar
4012 type_t *orig_top_type = path.top_type;
4013 type_t *top_type = skip_typeref(orig_top_type);
4015 if (is_string_type(top_type))
4017 descend_into_subtype(&path);
4021 ir_initializer_t *sub_irinitializer
4022 = create_ir_initializer(sub_initializer, path.top_type);
4024 size_t path_len = ARR_LEN(path.path);
4025 assert(path_len >= 1);
4026 type_path_entry_t *entry = & path.path[path_len-1];
4027 ir_initializer_t *tinitializer = entry->initializer;
4028 set_initializer_compound_value(tinitializer, entry->index,
4031 advance_current_object(&path);
4034 assert(ARR_LEN(path.path) >= 1);
4035 ir_initializer_t *result = path.path[0].initializer;
4036 DEL_ARR_F(path.path);
4041 static ir_initializer_t *create_ir_initializer_string(
4042 const initializer_string_t *initializer, type_t *type)
4044 type = skip_typeref(type);
4046 size_t string_len = initializer->string.size;
4047 assert(type->kind == TYPE_ARRAY);
4048 assert(type->array.size_constant);
4049 size_t len = type->array.size;
4050 ir_initializer_t *irinitializer = create_initializer_compound(len);
4052 const char *string = initializer->string.begin;
4053 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
4055 for (size_t i = 0; i < len; ++i) {
4060 ir_tarval *tv = new_tarval_from_long(c, mode);
4061 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4063 set_initializer_compound_value(irinitializer, i, char_initializer);
4066 return irinitializer;
4069 static ir_initializer_t *create_ir_initializer_wide_string(
4070 const initializer_wide_string_t *initializer, type_t *type)
4072 assert(type->kind == TYPE_ARRAY);
4073 assert(type->array.size_constant);
4074 size_t len = type->array.size;
4075 size_t string_len = wstrlen(&initializer->string);
4076 ir_initializer_t *irinitializer = create_initializer_compound(len);
4078 const char *p = initializer->string.begin;
4079 ir_mode *mode = get_type_mode(ir_type_wchar_t);
4081 for (size_t i = 0; i < len; ++i) {
4083 if (i < string_len) {
4084 c = read_utf8_char(&p);
4086 ir_tarval *tv = new_tarval_from_long(c, mode);
4087 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4089 set_initializer_compound_value(irinitializer, i, char_initializer);
4092 return irinitializer;
4095 static ir_initializer_t *create_ir_initializer(
4096 const initializer_t *initializer, type_t *type)
4098 switch(initializer->kind) {
4099 case INITIALIZER_STRING:
4100 return create_ir_initializer_string(&initializer->string, type);
4102 case INITIALIZER_WIDE_STRING:
4103 return create_ir_initializer_wide_string(&initializer->wide_string,
4106 case INITIALIZER_LIST:
4107 return create_ir_initializer_list(&initializer->list, type);
4109 case INITIALIZER_VALUE:
4110 return create_ir_initializer_value(&initializer->value);
4112 case INITIALIZER_DESIGNATOR:
4113 panic("unexpected designator initializer found");
4115 panic("unknown initializer");
4118 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4119 * are elements [...] the remainder of the aggregate shall be initialized
4120 * implicitly the same as objects that have static storage duration. */
4121 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4124 /* for unions we must NOT do anything for null initializers */
4125 ir_type *owner = get_entity_owner(entity);
4126 if (is_Union_type(owner)) {
4130 ir_type *ent_type = get_entity_type(entity);
4131 /* create sub-initializers for a compound type */
4132 if (is_compound_type(ent_type)) {
4133 unsigned n_members = get_compound_n_members(ent_type);
4134 for (unsigned n = 0; n < n_members; ++n) {
4135 ir_entity *member = get_compound_member(ent_type, n);
4136 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4138 create_dynamic_null_initializer(member, dbgi, addr);
4142 if (is_Array_type(ent_type)) {
4143 assert(has_array_upper_bound(ent_type, 0));
4144 long n = get_array_upper_bound_int(ent_type, 0);
4145 for (long i = 0; i < n; ++i) {
4146 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4147 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4148 ir_node *cnst = new_d_Const(dbgi, index_tv);
4149 ir_node *in[1] = { cnst };
4150 ir_entity *arrent = get_array_element_entity(ent_type);
4151 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4153 create_dynamic_null_initializer(arrent, dbgi, addr);
4158 ir_mode *value_mode = get_type_mode(ent_type);
4159 ir_node *node = new_Const(get_mode_null(value_mode));
4161 /* is it a bitfield type? */
4162 if (is_Primitive_type(ent_type) &&
4163 get_primitive_base_type(ent_type) != NULL) {
4164 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4168 ir_node *mem = get_store();
4169 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4170 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4174 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4175 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4177 switch(get_initializer_kind(initializer)) {
4178 case IR_INITIALIZER_NULL:
4179 create_dynamic_null_initializer(entity, dbgi, base_addr);
4181 case IR_INITIALIZER_CONST: {
4182 ir_node *node = get_initializer_const_value(initializer);
4183 ir_type *ent_type = get_entity_type(entity);
4185 /* is it a bitfield type? */
4186 if (is_Primitive_type(ent_type) &&
4187 get_primitive_base_type(ent_type) != NULL) {
4188 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4192 assert(get_type_mode(type) == get_irn_mode(node));
4193 ir_node *mem = get_store();
4194 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4195 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4199 case IR_INITIALIZER_TARVAL: {
4200 ir_tarval *tv = get_initializer_tarval_value(initializer);
4201 ir_node *cnst = new_d_Const(dbgi, tv);
4202 ir_type *ent_type = get_entity_type(entity);
4204 /* is it a bitfield type? */
4205 if (is_Primitive_type(ent_type) &&
4206 get_primitive_base_type(ent_type) != NULL) {
4207 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4211 assert(get_type_mode(type) == get_tarval_mode(tv));
4212 ir_node *mem = get_store();
4213 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4214 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4218 case IR_INITIALIZER_COMPOUND: {
4219 assert(is_compound_type(type) || is_Array_type(type));
4221 if (is_Array_type(type)) {
4222 assert(has_array_upper_bound(type, 0));
4223 n_members = get_array_upper_bound_int(type, 0);
4225 n_members = get_compound_n_members(type);
4228 if (get_initializer_compound_n_entries(initializer)
4229 != (unsigned) n_members)
4230 panic("initializer doesn't match compound type");
4232 for (int i = 0; i < n_members; ++i) {
4235 ir_entity *sub_entity;
4236 if (is_Array_type(type)) {
4237 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4238 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4239 ir_node *cnst = new_d_Const(dbgi, index_tv);
4240 ir_node *in[1] = { cnst };
4241 irtype = get_array_element_type(type);
4242 sub_entity = get_array_element_entity(type);
4243 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4246 sub_entity = get_compound_member(type, i);
4247 irtype = get_entity_type(sub_entity);
4248 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4252 ir_initializer_t *sub_init
4253 = get_initializer_compound_value(initializer, i);
4255 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4262 panic("invalid IR_INITIALIZER found");
4265 static void create_dynamic_initializer(ir_initializer_t *initializer,
4266 dbg_info *dbgi, ir_entity *entity)
4268 ir_node *frame = get_irg_frame(current_ir_graph);
4269 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4270 ir_type *type = get_entity_type(entity);
4272 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4275 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4276 ir_entity *entity, type_t *type)
4278 ir_node *memory = get_store();
4279 ir_node *nomem = new_NoMem();
4280 ir_node *frame = get_irg_frame(current_ir_graph);
4281 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4283 if (initializer->kind == INITIALIZER_VALUE) {
4284 initializer_value_t *initializer_value = &initializer->value;
4286 ir_node *value = expression_to_firm(initializer_value->value);
4287 type = skip_typeref(type);
4288 assign_value(dbgi, addr, type, value);
4292 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4293 ir_initializer_t *irinitializer
4294 = create_ir_initializer(initializer, type);
4296 create_dynamic_initializer(irinitializer, dbgi, entity);
4300 /* create a "template" entity which is copied to the entity on the stack */
4301 ir_entity *const init_entity
4302 = create_initializer_entity(dbgi, initializer, type);
4303 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4304 ir_type *const irtype = get_ir_type(type);
4305 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4307 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4308 set_store(copyb_mem);
4311 static void create_initializer_local_variable_entity(entity_t *entity)
4313 assert(entity->kind == ENTITY_VARIABLE);
4314 initializer_t *initializer = entity->variable.initializer;
4315 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4316 ir_entity *irentity = entity->variable.v.entity;
4317 type_t *type = entity->declaration.type;
4319 create_local_initializer(initializer, dbgi, irentity, type);
4322 static void create_variable_initializer(entity_t *entity)
4324 assert(entity->kind == ENTITY_VARIABLE);
4325 initializer_t *initializer = entity->variable.initializer;
4326 if (initializer == NULL)
4329 declaration_kind_t declaration_kind
4330 = (declaration_kind_t) entity->declaration.kind;
4331 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4332 create_initializer_local_variable_entity(entity);
4336 type_t *type = entity->declaration.type;
4337 type_qualifiers_t tq = get_type_qualifier(type, true);
4339 if (initializer->kind == INITIALIZER_VALUE) {
4340 initializer_value_t *initializer_value = &initializer->value;
4341 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4342 expression_t *value = initializer_value->value;
4343 type_t *init_type = value->base.type;
4344 type_t *skipped = skip_typeref(init_type);
4346 if (!is_type_scalar(skipped)) {
4348 while (value->kind == EXPR_UNARY_CAST)
4349 value = value->unary.value;
4351 if (value->kind != EXPR_COMPOUND_LITERAL)
4352 panic("expected non-scalar initializer to be a compound literal");
4353 initializer = value->compound_literal.initializer;
4354 goto have_initializer;
4357 ir_node *node = expression_to_firm(initializer_value->value);
4359 ir_mode *mode = get_ir_mode_storage(init_type);
4360 node = create_conv(dbgi, node, mode);
4361 node = do_strict_conv(dbgi, node);
4363 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4364 set_value(entity->variable.v.value_number, node);
4366 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4368 ir_entity *irentity = entity->variable.v.entity;
4370 if (tq & TYPE_QUALIFIER_CONST
4371 && get_entity_owner(irentity) != get_tls_type()) {
4372 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4374 set_atomic_ent_value(irentity, node);
4378 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4379 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4381 ir_entity *irentity = entity->variable.v.entity;
4382 ir_initializer_t *irinitializer
4383 = create_ir_initializer(initializer, type);
4385 if (tq & TYPE_QUALIFIER_CONST) {
4386 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4388 set_entity_initializer(irentity, irinitializer);
4392 static void create_variable_length_array(entity_t *entity)
4394 assert(entity->kind == ENTITY_VARIABLE);
4395 assert(entity->variable.initializer == NULL);
4397 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4398 entity->variable.v.vla_base = NULL;
4400 /* TODO: record VLA somewhere so we create the free node when we leave
4404 static void allocate_variable_length_array(entity_t *entity)
4406 assert(entity->kind == ENTITY_VARIABLE);
4407 assert(entity->variable.initializer == NULL);
4408 assert(currently_reachable());
4410 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4411 type_t *type = entity->declaration.type;
4412 ir_type *el_type = get_ir_type(type->array.element_type);
4414 /* make sure size_node is calculated */
4415 get_type_size_node(type);
4416 ir_node *elems = type->array.size_node;
4417 ir_node *mem = get_store();
4418 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4420 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4421 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4424 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4425 entity->variable.v.vla_base = addr;
4429 * Creates a Firm local variable from a declaration.
4431 static void create_local_variable(entity_t *entity)
4433 assert(entity->kind == ENTITY_VARIABLE);
4434 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4436 bool needs_entity = entity->variable.address_taken;
4437 type_t *type = skip_typeref(entity->declaration.type);
4439 /* is it a variable length array? */
4440 if (is_type_array(type) && !type->array.size_constant) {
4441 create_variable_length_array(entity);
4443 } else if (is_type_array(type) || is_type_compound(type)) {
4444 needs_entity = true;
4445 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4446 needs_entity = true;
4450 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4451 create_variable_entity(entity,
4452 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4455 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4456 entity->variable.v.value_number = next_value_number_function;
4457 set_irg_loc_description(current_ir_graph, next_value_number_function,
4459 ++next_value_number_function;
4463 static void create_local_static_variable(entity_t *entity)
4465 assert(entity->kind == ENTITY_VARIABLE);
4466 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4468 type_t *type = skip_typeref(entity->declaration.type);
4469 ir_type *const var_type = entity->variable.thread_local ?
4470 get_tls_type() : get_glob_type();
4471 ir_type *const irtype = get_ir_type(type);
4472 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4474 size_t l = strlen(entity->base.symbol->string);
4475 char buf[l + sizeof(".%u")];
4476 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4477 ident *const id = id_unique(buf);
4478 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4480 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4481 set_entity_volatility(irentity, volatility_is_volatile);
4484 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4485 entity->variable.v.entity = irentity;
4487 set_entity_ld_ident(irentity, id);
4488 set_entity_visibility(irentity, ir_visibility_local);
4490 ir_graph *const old_current_ir_graph = current_ir_graph;
4491 current_ir_graph = get_const_code_irg();
4493 create_variable_initializer(entity);
4495 assert(current_ir_graph == get_const_code_irg());
4496 current_ir_graph = old_current_ir_graph;
4501 static void return_statement_to_firm(return_statement_t *statement)
4503 if (!currently_reachable())
4506 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4507 type_t *type = current_function_entity->declaration.type;
4508 ir_type *func_irtype = get_ir_type(type);
4512 if (get_method_n_ress(func_irtype) > 0) {
4513 ir_type *res_type = get_method_res_type(func_irtype, 0);
4515 if (statement->value != NULL) {
4516 ir_node *node = expression_to_firm(statement->value);
4517 if (!is_compound_type(res_type)) {
4518 type_t *ret_value_type = statement->value->base.type;
4519 ir_mode *mode = get_ir_mode_storage(ret_value_type);
4520 node = create_conv(dbgi, node, mode);
4521 node = do_strict_conv(dbgi, node);
4526 if (is_compound_type(res_type)) {
4529 mode = get_type_mode(res_type);
4531 in[0] = new_Unknown(mode);
4535 /* build return_value for its side effects */
4536 if (statement->value != NULL) {
4537 expression_to_firm(statement->value);
4542 ir_node *store = get_store();
4543 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4545 ir_node *end_block = get_irg_end_block(current_ir_graph);
4546 add_immBlock_pred(end_block, ret);
4548 set_unreachable_now();
4551 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4553 if (!currently_reachable())
4556 return expression_to_firm(statement->expression);
4559 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4561 entity_t *entity = compound->scope.entities;
4562 for ( ; entity != NULL; entity = entity->base.next) {
4563 if (!is_declaration(entity))
4566 create_local_declaration(entity);
4569 ir_node *result = NULL;
4570 statement_t *statement = compound->statements;
4571 for ( ; statement != NULL; statement = statement->base.next) {
4572 if (statement->base.next == NULL
4573 && statement->kind == STATEMENT_EXPRESSION) {
4574 result = expression_statement_to_firm(
4575 &statement->expression);
4578 statement_to_firm(statement);
4584 static void create_global_variable(entity_t *entity)
4586 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4587 ir_visibility visibility = ir_visibility_default;
4588 ir_entity *irentity;
4589 assert(entity->kind == ENTITY_VARIABLE);
4591 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4592 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4593 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4594 case STORAGE_CLASS_NONE:
4595 visibility = ir_visibility_default;
4596 /* uninitialized globals get merged in C */
4597 if (entity->variable.initializer == NULL)
4598 linkage |= IR_LINKAGE_MERGE;
4600 case STORAGE_CLASS_TYPEDEF:
4601 case STORAGE_CLASS_AUTO:
4602 case STORAGE_CLASS_REGISTER:
4603 panic("invalid storage class for global var");
4606 ir_type *var_type = get_glob_type();
4607 if (entity->variable.thread_local) {
4608 var_type = get_tls_type();
4609 /* LINKAGE_MERGE not supported by current linkers */
4610 linkage &= ~IR_LINKAGE_MERGE;
4612 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4613 irentity = entity->variable.v.entity;
4614 add_entity_linkage(irentity, linkage);
4615 set_entity_visibility(irentity, visibility);
4618 static void create_local_declaration(entity_t *entity)
4620 assert(is_declaration(entity));
4622 /* construct type */
4623 (void) get_ir_type(entity->declaration.type);
4624 if (entity->base.symbol == NULL) {
4628 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4629 case STORAGE_CLASS_STATIC:
4630 if (entity->kind == ENTITY_FUNCTION) {
4631 (void)get_function_entity(entity, NULL);
4633 create_local_static_variable(entity);
4636 case STORAGE_CLASS_EXTERN:
4637 if (entity->kind == ENTITY_FUNCTION) {
4638 assert(entity->function.statement == NULL);
4639 (void)get_function_entity(entity, NULL);
4641 create_global_variable(entity);
4642 create_variable_initializer(entity);
4645 case STORAGE_CLASS_NONE:
4646 case STORAGE_CLASS_AUTO:
4647 case STORAGE_CLASS_REGISTER:
4648 if (entity->kind == ENTITY_FUNCTION) {
4649 if (entity->function.statement != NULL) {
4650 ir_type *owner = get_irg_frame_type(current_ir_graph);
4651 (void)get_function_entity(entity, owner);
4652 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4653 enqueue_inner_function(entity);
4655 (void)get_function_entity(entity, NULL);
4658 create_local_variable(entity);
4661 case STORAGE_CLASS_TYPEDEF:
4664 panic("invalid storage class found");
4667 static void initialize_local_declaration(entity_t *entity)
4669 if (entity->base.symbol == NULL)
4672 // no need to emit code in dead blocks
4673 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4674 && !currently_reachable())
4677 switch ((declaration_kind_t) entity->declaration.kind) {
4678 case DECLARATION_KIND_LOCAL_VARIABLE:
4679 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4680 create_variable_initializer(entity);
4683 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4684 allocate_variable_length_array(entity);
4687 case DECLARATION_KIND_COMPOUND_MEMBER:
4688 case DECLARATION_KIND_GLOBAL_VARIABLE:
4689 case DECLARATION_KIND_FUNCTION:
4690 case DECLARATION_KIND_INNER_FUNCTION:
4693 case DECLARATION_KIND_PARAMETER:
4694 case DECLARATION_KIND_PARAMETER_ENTITY:
4695 panic("can't initialize parameters");
4697 case DECLARATION_KIND_UNKNOWN:
4698 panic("can't initialize unknown declaration");
4700 panic("invalid declaration kind");
4703 static void declaration_statement_to_firm(declaration_statement_t *statement)
4705 entity_t *entity = statement->declarations_begin;
4709 entity_t *const last = statement->declarations_end;
4710 for ( ;; entity = entity->base.next) {
4711 if (is_declaration(entity)) {
4712 initialize_local_declaration(entity);
4713 } else if (entity->kind == ENTITY_TYPEDEF) {
4714 /* ยง6.7.7:3 Any array size expressions associated with variable length
4715 * array declarators are evaluated each time the declaration of the
4716 * typedef name is reached in the order of execution. */
4717 type_t *const type = skip_typeref(entity->typedefe.type);
4718 if (is_type_array(type) && type->array.is_vla)
4719 get_vla_size(&type->array);
4726 static void if_statement_to_firm(if_statement_t *statement)
4728 /* Create the condition. */
4729 ir_node *true_block = NULL;
4730 ir_node *false_block = NULL;
4731 if (currently_reachable()) {
4732 true_block = new_immBlock();
4733 false_block = new_immBlock();
4734 create_condition_evaluation(statement->condition, true_block, false_block);
4735 mature_immBlock(true_block);
4736 mature_immBlock(false_block);
4739 /* Create the true statement. */
4740 set_cur_block(true_block);
4741 statement_to_firm(statement->true_statement);
4742 ir_node *fallthrough_block = get_cur_block();
4744 /* Create the false statement. */
4745 set_cur_block(false_block);
4746 if (statement->false_statement != NULL) {
4747 statement_to_firm(statement->false_statement);
4750 /* Handle the block after the if-statement. Minor simplification and
4751 * optimisation: Reuse the false/true block as fallthrough block, if the
4752 * true/false statement does not pass control to the fallthrough block, e.g.
4753 * in the typical if (x) return; pattern. */
4754 if (fallthrough_block) {
4755 if (currently_reachable()) {
4756 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4757 ir_node *const f_jump = new_Jmp();
4758 ir_node *const in[] = { t_jump, f_jump };
4759 fallthrough_block = new_Block(2, in);
4761 set_cur_block(fallthrough_block);
4765 /* Create a jump node which jumps into target_block, if the current block is
4767 static void jump_if_reachable(ir_node *const target_block)
4769 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4770 add_immBlock_pred(target_block, pred);
4773 static void while_statement_to_firm(while_statement_t *statement)
4775 /* Create the header block */
4776 ir_node *const header_block = new_immBlock();
4777 jump_if_reachable(header_block);
4779 /* Create the condition. */
4780 ir_node * body_block;
4781 ir_node * false_block;
4782 expression_t *const cond = statement->condition;
4783 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4784 fold_constant_to_bool(cond)) {
4785 /* Shortcut for while (true). */
4786 body_block = header_block;
4789 keep_alive(header_block);
4790 keep_all_memory(header_block);
4792 body_block = new_immBlock();
4793 false_block = new_immBlock();
4795 set_cur_block(header_block);
4796 create_condition_evaluation(cond, body_block, false_block);
4797 mature_immBlock(body_block);
4800 ir_node *const old_continue_label = continue_label;
4801 ir_node *const old_break_label = break_label;
4802 continue_label = header_block;
4803 break_label = false_block;
4805 /* Create the loop body. */
4806 set_cur_block(body_block);
4807 statement_to_firm(statement->body);
4808 jump_if_reachable(header_block);
4810 mature_immBlock(header_block);
4811 assert(false_block == NULL || false_block == break_label);
4812 false_block = break_label;
4813 if (false_block != NULL) {
4814 mature_immBlock(false_block);
4816 set_cur_block(false_block);
4818 assert(continue_label == header_block);
4819 continue_label = old_continue_label;
4820 break_label = old_break_label;
4823 static ir_node *get_break_label(void)
4825 if (break_label == NULL) {
4826 break_label = new_immBlock();
4831 static void do_while_statement_to_firm(do_while_statement_t *statement)
4833 /* create the header block */
4834 ir_node *header_block = new_immBlock();
4837 ir_node *body_block = new_immBlock();
4838 jump_if_reachable(body_block);
4840 ir_node *old_continue_label = continue_label;
4841 ir_node *old_break_label = break_label;
4842 continue_label = header_block;
4845 set_cur_block(body_block);
4846 statement_to_firm(statement->body);
4847 ir_node *const false_block = get_break_label();
4849 assert(continue_label == header_block);
4850 continue_label = old_continue_label;
4851 break_label = old_break_label;
4853 jump_if_reachable(header_block);
4855 /* create the condition */
4856 mature_immBlock(header_block);
4857 set_cur_block(header_block);
4859 create_condition_evaluation(statement->condition, body_block, false_block);
4860 mature_immBlock(body_block);
4861 mature_immBlock(false_block);
4863 set_cur_block(false_block);
4866 static void for_statement_to_firm(for_statement_t *statement)
4868 /* create declarations */
4869 entity_t *entity = statement->scope.entities;
4870 for ( ; entity != NULL; entity = entity->base.next) {
4871 if (!is_declaration(entity))
4874 create_local_declaration(entity);
4877 if (currently_reachable()) {
4878 entity = statement->scope.entities;
4879 for ( ; entity != NULL; entity = entity->base.next) {
4880 if (!is_declaration(entity))
4883 initialize_local_declaration(entity);
4886 if (statement->initialisation != NULL) {
4887 expression_to_firm(statement->initialisation);
4891 /* Create the header block */
4892 ir_node *const header_block = new_immBlock();
4893 jump_if_reachable(header_block);
4895 /* Create the condition. */
4896 ir_node *body_block;
4897 ir_node *false_block;
4898 if (statement->condition != NULL) {
4899 body_block = new_immBlock();
4900 false_block = new_immBlock();
4902 set_cur_block(header_block);
4903 create_condition_evaluation(statement->condition, body_block, false_block);
4904 mature_immBlock(body_block);
4907 body_block = header_block;
4910 keep_alive(header_block);
4911 keep_all_memory(header_block);
4914 /* Create the step block, if necessary. */
4915 ir_node * step_block = header_block;
4916 expression_t *const step = statement->step;
4918 step_block = new_immBlock();
4921 ir_node *const old_continue_label = continue_label;
4922 ir_node *const old_break_label = break_label;
4923 continue_label = step_block;
4924 break_label = false_block;
4926 /* Create the loop body. */
4927 set_cur_block(body_block);
4928 statement_to_firm(statement->body);
4929 jump_if_reachable(step_block);
4931 /* Create the step code. */
4933 mature_immBlock(step_block);
4934 set_cur_block(step_block);
4935 expression_to_firm(step);
4936 jump_if_reachable(header_block);
4939 mature_immBlock(header_block);
4940 assert(false_block == NULL || false_block == break_label);
4941 false_block = break_label;
4942 if (false_block != NULL) {
4943 mature_immBlock(false_block);
4945 set_cur_block(false_block);
4947 assert(continue_label == step_block);
4948 continue_label = old_continue_label;
4949 break_label = old_break_label;
4952 static void create_jump_statement(const statement_t *statement,
4953 ir_node *target_block)
4955 if (!currently_reachable())
4958 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4959 ir_node *jump = new_d_Jmp(dbgi);
4960 add_immBlock_pred(target_block, jump);
4962 set_unreachable_now();
4965 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4967 /* determine number of cases */
4969 for (case_label_statement_t *l = statement->first_case; l != NULL;
4972 if (l->expression == NULL)
4974 if (l->is_empty_range)
4979 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4981 for (case_label_statement_t *l = statement->first_case; l != NULL;
4983 if (l->expression == NULL) {
4984 l->pn = pn_Switch_default;
4987 if (l->is_empty_range)
4989 ir_tarval *min = fold_constant_to_tarval(l->expression);
4990 ir_tarval *max = min;
4991 long pn = (long) i+1;
4992 if (l->end_range != NULL)
4993 max = fold_constant_to_tarval(l->end_range);
4994 ir_switch_table_set(res, i++, min, max, pn);
5000 static void switch_statement_to_firm(switch_statement_t *statement)
5002 ir_node *first_block = NULL;
5003 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5004 ir_node *switch_node = NULL;
5006 if (currently_reachable()) {
5007 ir_node *expression = expression_to_firm(statement->expression);
5008 ir_switch_table *table = create_switch_table(statement);
5009 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5011 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5012 first_block = get_cur_block();
5015 set_unreachable_now();
5017 ir_node *const old_switch = current_switch;
5018 ir_node *const old_break_label = break_label;
5019 const bool old_saw_default_label = saw_default_label;
5020 saw_default_label = false;
5021 current_switch = switch_node;
5024 statement_to_firm(statement->body);
5026 jump_if_reachable(get_break_label());
5028 if (!saw_default_label && first_block != NULL) {
5029 set_cur_block(first_block);
5030 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5031 add_immBlock_pred(get_break_label(), proj);
5034 if (break_label != NULL) {
5035 mature_immBlock(break_label);
5037 set_cur_block(break_label);
5039 assert(current_switch == switch_node);
5040 current_switch = old_switch;
5041 break_label = old_break_label;
5042 saw_default_label = old_saw_default_label;
5045 static void case_label_to_firm(const case_label_statement_t *statement)
5047 if (statement->is_empty_range)
5050 if (current_switch != NULL) {
5051 ir_node *block = new_immBlock();
5052 /* Fallthrough from previous case */
5053 jump_if_reachable(block);
5055 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5056 add_immBlock_pred(block, proj);
5057 if (statement->expression == NULL)
5058 saw_default_label = true;
5060 mature_immBlock(block);
5061 set_cur_block(block);
5064 statement_to_firm(statement->statement);
5067 static void label_to_firm(const label_statement_t *statement)
5069 ir_node *block = get_label_block(statement->label);
5070 jump_if_reachable(block);
5072 set_cur_block(block);
5074 keep_all_memory(block);
5076 statement_to_firm(statement->statement);
5079 static void computed_goto_to_firm(computed_goto_statement_t const *const statement)
5081 if (!currently_reachable())
5084 ir_node *const irn = expression_to_firm(statement->expression);
5085 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5086 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
5088 set_irn_link(ijmp, ijmp_list);
5091 set_unreachable_now();
5094 static void asm_statement_to_firm(const asm_statement_t *statement)
5096 bool needs_memory = false;
5098 if (statement->is_volatile) {
5099 needs_memory = true;
5102 size_t n_clobbers = 0;
5103 asm_clobber_t *clobber = statement->clobbers;
5104 for ( ; clobber != NULL; clobber = clobber->next) {
5105 const char *clobber_str = clobber->clobber.begin;
5107 if (!be_is_valid_clobber(clobber_str)) {
5108 errorf(&statement->base.source_position,
5109 "invalid clobber '%s' specified", clobber->clobber);
5113 if (streq(clobber_str, "memory")) {
5114 needs_memory = true;
5118 ident *id = new_id_from_str(clobber_str);
5119 obstack_ptr_grow(&asm_obst, id);
5122 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5123 ident **clobbers = NULL;
5124 if (n_clobbers > 0) {
5125 clobbers = obstack_finish(&asm_obst);
5128 size_t n_inputs = 0;
5129 asm_argument_t *argument = statement->inputs;
5130 for ( ; argument != NULL; argument = argument->next)
5132 size_t n_outputs = 0;
5133 argument = statement->outputs;
5134 for ( ; argument != NULL; argument = argument->next)
5137 unsigned next_pos = 0;
5139 ir_node *ins[n_inputs + n_outputs + 1];
5142 ir_asm_constraint tmp_in_constraints[n_outputs];
5144 const expression_t *out_exprs[n_outputs];
5145 ir_node *out_addrs[n_outputs];
5146 size_t out_size = 0;
5148 argument = statement->outputs;
5149 for ( ; argument != NULL; argument = argument->next) {
5150 const char *constraints = argument->constraints.begin;
5151 asm_constraint_flags_t asm_flags
5152 = be_parse_asm_constraints(constraints);
5155 source_position_t const *const pos = &statement->base.source_position;
5156 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5157 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5159 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5160 errorf(pos, "some constraints in '%s' are invalid", constraints);
5163 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5164 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5169 unsigned pos = next_pos++;
5170 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5171 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5172 expression_t *expr = argument->expression;
5173 ir_node *addr = expression_to_addr(expr);
5174 /* in+output, construct an artifical same_as constraint on the
5176 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5178 ir_node *value = get_value_from_lvalue(expr, addr);
5180 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5182 ir_asm_constraint constraint;
5183 constraint.pos = pos;
5184 constraint.constraint = new_id_from_str(buf);
5185 constraint.mode = get_ir_mode_storage(expr->base.type);
5186 tmp_in_constraints[in_size] = constraint;
5187 ins[in_size] = value;
5192 out_exprs[out_size] = expr;
5193 out_addrs[out_size] = addr;
5195 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5196 /* pure memory ops need no input (but we have to make sure we
5197 * attach to the memory) */
5198 assert(! (asm_flags &
5199 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5200 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5201 needs_memory = true;
5203 /* we need to attach the address to the inputs */
5204 expression_t *expr = argument->expression;
5206 ir_asm_constraint constraint;
5207 constraint.pos = pos;
5208 constraint.constraint = new_id_from_str(constraints);
5209 constraint.mode = mode_M;
5210 tmp_in_constraints[in_size] = constraint;
5212 ins[in_size] = expression_to_addr(expr);
5216 errorf(&statement->base.source_position,
5217 "only modifiers but no place set in constraints '%s'",
5222 ir_asm_constraint constraint;
5223 constraint.pos = pos;
5224 constraint.constraint = new_id_from_str(constraints);
5225 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5227 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5229 assert(obstack_object_size(&asm_obst)
5230 == out_size * sizeof(ir_asm_constraint));
5231 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5234 obstack_grow(&asm_obst, tmp_in_constraints,
5235 in_size * sizeof(tmp_in_constraints[0]));
5236 /* find and count input and output arguments */
5237 argument = statement->inputs;
5238 for ( ; argument != NULL; argument = argument->next) {
5239 const char *constraints = argument->constraints.begin;
5240 asm_constraint_flags_t asm_flags
5241 = be_parse_asm_constraints(constraints);
5243 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5244 errorf(&statement->base.source_position,
5245 "some constraints in '%s' are not supported", constraints);
5248 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5249 errorf(&statement->base.source_position,
5250 "some constraints in '%s' are invalid", constraints);
5253 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5254 errorf(&statement->base.source_position,
5255 "write flag specified for input constraints '%s'",
5261 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5262 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5263 /* we can treat this as "normal" input */
5264 input = expression_to_firm(argument->expression);
5265 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5266 /* pure memory ops need no input (but we have to make sure we
5267 * attach to the memory) */
5268 assert(! (asm_flags &
5269 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5270 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5271 needs_memory = true;
5272 input = expression_to_addr(argument->expression);
5274 errorf(&statement->base.source_position,
5275 "only modifiers but no place set in constraints '%s'",
5280 ir_asm_constraint constraint;
5281 constraint.pos = next_pos++;
5282 constraint.constraint = new_id_from_str(constraints);
5283 constraint.mode = get_irn_mode(input);
5285 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5286 ins[in_size++] = input;
5290 ir_asm_constraint constraint;
5291 constraint.pos = next_pos++;
5292 constraint.constraint = new_id_from_str("");
5293 constraint.mode = mode_M;
5295 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5296 ins[in_size++] = get_store();
5299 assert(obstack_object_size(&asm_obst)
5300 == in_size * sizeof(ir_asm_constraint));
5301 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5303 /* create asm node */
5304 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5306 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5308 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5309 out_size, output_constraints,
5310 n_clobbers, clobbers, asm_text);
5312 if (statement->is_volatile) {
5313 set_irn_pinned(node, op_pin_state_pinned);
5315 set_irn_pinned(node, op_pin_state_floats);
5318 /* create output projs & connect them */
5320 ir_node *projm = new_Proj(node, mode_M, out_size);
5325 for (i = 0; i < out_size; ++i) {
5326 const expression_t *out_expr = out_exprs[i];
5328 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5329 ir_node *proj = new_Proj(node, mode, pn);
5330 ir_node *addr = out_addrs[i];
5332 set_value_for_expression_addr(out_expr, proj, addr);
5336 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5338 statement_to_firm(statement->try_statement);
5339 source_position_t const *const pos = &statement->base.source_position;
5340 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5343 static void leave_statement_to_firm(leave_statement_t *statement)
5345 errorf(&statement->base.source_position, "__leave not supported yet");
5349 * Transform a statement.
5351 static void statement_to_firm(statement_t *const stmt)
5354 assert(!stmt->base.transformed);
5355 stmt->base.transformed = true;
5358 switch (stmt->kind) {
5359 case STATEMENT_ASM: asm_statement_to_firm( &stmt->asms); return;
5360 case STATEMENT_CASE_LABEL: case_label_to_firm( &stmt->case_label); return;
5361 case STATEMENT_COMPOUND: compound_statement_to_firm( &stmt->compound); return;
5362 case STATEMENT_COMPUTED_GOTO: computed_goto_to_firm( &stmt->computed_goto); return;
5363 case STATEMENT_DECLARATION: declaration_statement_to_firm(&stmt->declaration); return;
5364 case STATEMENT_DO_WHILE: do_while_statement_to_firm( &stmt->do_while); return;
5365 case STATEMENT_EMPTY: /* nothing */ return;
5366 case STATEMENT_EXPRESSION: expression_statement_to_firm( &stmt->expression); return;
5367 case STATEMENT_FOR: for_statement_to_firm( &stmt->fors); return;
5368 case STATEMENT_IF: if_statement_to_firm( &stmt->ifs); return;
5369 case STATEMENT_LABEL: label_to_firm( &stmt->label); return;
5370 case STATEMENT_LEAVE: leave_statement_to_firm( &stmt->leave); return;
5371 case STATEMENT_MS_TRY: ms_try_statement_to_firm( &stmt->ms_try); return;
5372 case STATEMENT_RETURN: return_statement_to_firm( &stmt->returns); return;
5373 case STATEMENT_SWITCH: switch_statement_to_firm( &stmt->switchs); return;
5374 case STATEMENT_WHILE: while_statement_to_firm( &stmt->whiles); return;
5376 case STATEMENT_BREAK: create_jump_statement(stmt, get_break_label()); return;
5377 case STATEMENT_CONTINUE: create_jump_statement(stmt, continue_label); return;
5378 case STATEMENT_GOTO: create_jump_statement(stmt, get_label_block(stmt->gotos.label)); return;
5380 case STATEMENT_ERROR: panic("error statement found");
5382 panic("statement not implemented");
5385 static int count_local_variables(const entity_t *entity,
5386 const entity_t *const last)
5389 entity_t const *const end = last != NULL ? last->base.next : NULL;
5390 for (; entity != end; entity = entity->base.next) {
5394 if (entity->kind == ENTITY_VARIABLE) {
5395 type = skip_typeref(entity->declaration.type);
5396 address_taken = entity->variable.address_taken;
5397 } else if (entity->kind == ENTITY_PARAMETER) {
5398 type = skip_typeref(entity->declaration.type);
5399 address_taken = entity->parameter.address_taken;
5404 if (!address_taken && is_type_scalar(type))
5410 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5412 int *const count = env;
5414 switch (stmt->kind) {
5415 case STATEMENT_DECLARATION: {
5416 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5417 *count += count_local_variables(decl_stmt->declarations_begin,
5418 decl_stmt->declarations_end);
5423 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5432 * Return the number of local (alias free) variables used by a function.
5434 static int get_function_n_local_vars(entity_t *entity)
5436 const function_t *function = &entity->function;
5439 /* count parameters */
5440 count += count_local_variables(function->parameters.entities, NULL);
5442 /* count local variables declared in body */
5443 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5448 * Build Firm code for the parameters of a function.
5450 static void initialize_function_parameters(entity_t *entity)
5452 assert(entity->kind == ENTITY_FUNCTION);
5453 ir_graph *irg = current_ir_graph;
5454 ir_node *args = get_irg_args(irg);
5456 ir_type *function_irtype;
5458 if (entity->function.need_closure) {
5459 /* add an extra parameter for the static link */
5460 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5463 /* Matze: IMO this is wrong, nested functions should have an own
5464 * type and not rely on strange parameters... */
5465 function_irtype = create_method_type(&entity->declaration.type->function, true);
5467 function_irtype = get_ir_type(entity->declaration.type);
5472 entity_t *parameter = entity->function.parameters.entities;
5473 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5474 if (parameter->kind != ENTITY_PARAMETER)
5477 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5478 type_t *type = skip_typeref(parameter->declaration.type);
5480 bool needs_entity = parameter->parameter.address_taken;
5481 assert(!is_type_array(type));
5482 if (is_type_compound(type)) {
5483 needs_entity = true;
5486 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5488 ir_type *frame_type = get_irg_frame_type(irg);
5490 = new_parameter_entity(frame_type, n, param_irtype);
5491 parameter->declaration.kind
5492 = DECLARATION_KIND_PARAMETER_ENTITY;
5493 parameter->parameter.v.entity = param;
5497 ir_mode *param_mode = get_type_mode(param_irtype);
5499 ir_node *value = new_r_Proj(args, param_mode, pn);
5501 ir_mode *mode = get_ir_mode_storage(type);
5502 value = create_conv(NULL, value, mode);
5503 value = do_strict_conv(NULL, value);
5505 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5506 parameter->parameter.v.value_number = next_value_number_function;
5507 set_irg_loc_description(current_ir_graph, next_value_number_function,
5509 ++next_value_number_function;
5511 set_value(parameter->parameter.v.value_number, value);
5516 * Handle additional decl modifiers for IR-graphs
5518 * @param irg the IR-graph
5519 * @param dec_modifiers additional modifiers
5521 static void handle_decl_modifier_irg(ir_graph *irg,
5522 decl_modifiers_t decl_modifiers)
5524 if (decl_modifiers & DM_NAKED) {
5525 /* TRUE if the declaration includes the Microsoft
5526 __declspec(naked) specifier. */
5527 add_irg_additional_properties(irg, mtp_property_naked);
5529 if (decl_modifiers & DM_FORCEINLINE) {
5530 /* TRUE if the declaration includes the
5531 Microsoft __forceinline specifier. */
5532 set_irg_inline_property(irg, irg_inline_forced);
5534 if (decl_modifiers & DM_NOINLINE) {
5535 /* TRUE if the declaration includes the Microsoft
5536 __declspec(noinline) specifier. */
5537 set_irg_inline_property(irg, irg_inline_forbidden);
5541 static void add_function_pointer(ir_type *segment, ir_entity *method,
5542 const char *unique_template)
5544 ir_type *method_type = get_entity_type(method);
5545 ir_type *ptr_type = new_type_pointer(method_type);
5547 /* these entities don't really have a name but firm only allows
5549 * Note that we mustn't give these entities a name since for example
5550 * Mach-O doesn't allow them. */
5551 ident *ide = id_unique(unique_template);
5552 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5553 ir_graph *irg = get_const_code_irg();
5554 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5557 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5558 set_entity_compiler_generated(ptr, 1);
5559 set_entity_visibility(ptr, ir_visibility_private);
5560 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5561 set_atomic_ent_value(ptr, val);
5565 * Generate possible IJmp branches to a given label block.
5567 static void gen_ijmp_branches(ir_node *block)
5570 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5571 add_immBlock_pred(block, ijmp);
5576 * Create code for a function and all inner functions.
5578 * @param entity the function entity
5580 static void create_function(entity_t *entity)
5582 assert(entity->kind == ENTITY_FUNCTION);
5583 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5585 if (entity->function.statement == NULL)
5588 inner_functions = NULL;
5589 current_trampolines = NULL;
5591 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5592 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5593 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5595 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5596 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5597 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5600 current_function_entity = entity;
5601 current_function_name = NULL;
5602 current_funcsig = NULL;
5604 assert(all_labels == NULL);
5605 all_labels = NEW_ARR_F(label_t *, 0);
5608 int n_local_vars = get_function_n_local_vars(entity);
5609 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5610 current_ir_graph = irg;
5612 ir_graph *old_current_function = current_function;
5613 current_function = irg;
5615 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5616 current_vararg_entity = NULL;
5618 set_irg_fp_model(irg, firm_fp_model);
5619 tarval_enable_fp_ops(1);
5620 set_irn_dbg_info(get_irg_start_block(irg),
5621 get_entity_dbg_info(function_entity));
5623 /* set inline flags */
5624 if (entity->function.is_inline)
5625 set_irg_inline_property(irg, irg_inline_recomended);
5626 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5628 next_value_number_function = 0;
5629 initialize_function_parameters(entity);
5630 current_static_link = entity->function.static_link;
5632 statement_to_firm(entity->function.statement);
5634 ir_node *end_block = get_irg_end_block(irg);
5636 /* do we have a return statement yet? */
5637 if (currently_reachable()) {
5638 type_t *type = skip_typeref(entity->declaration.type);
5639 assert(is_type_function(type));
5640 const function_type_t *func_type = &type->function;
5641 const type_t *return_type
5642 = skip_typeref(func_type->return_type);
5645 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5646 ret = new_Return(get_store(), 0, NULL);
5649 if (is_type_scalar(return_type)) {
5650 mode = get_ir_mode_storage(func_type->return_type);
5656 /* ยง5.1.2.2.3 main implicitly returns 0 */
5657 if (is_main(entity)) {
5658 in[0] = new_Const(get_mode_null(mode));
5660 in[0] = new_Unknown(mode);
5662 ret = new_Return(get_store(), 1, in);
5664 add_immBlock_pred(end_block, ret);
5667 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5668 label_t *label = all_labels[i];
5669 if (label->address_taken) {
5670 gen_ijmp_branches(label->block);
5672 mature_immBlock(label->block);
5675 DEL_ARR_F(all_labels);
5678 irg_finalize_cons(irg);
5680 /* finalize the frame type */
5681 ir_type *frame_type = get_irg_frame_type(irg);
5682 int n = get_compound_n_members(frame_type);
5685 for (int i = 0; i < n; ++i) {
5686 ir_entity *member = get_compound_member(frame_type, i);
5687 ir_type *entity_type = get_entity_type(member);
5689 int align = get_type_alignment_bytes(entity_type);
5690 if (align > align_all)
5694 misalign = offset % align;
5696 offset += align - misalign;
5700 set_entity_offset(member, offset);
5701 offset += get_type_size_bytes(entity_type);
5703 set_type_size_bytes(frame_type, offset);
5704 set_type_alignment_bytes(frame_type, align_all);
5706 irg_verify(irg, VERIFY_ENFORCE_SSA);
5707 current_vararg_entity = old_current_vararg_entity;
5708 current_function = old_current_function;
5710 if (current_trampolines != NULL) {
5711 DEL_ARR_F(current_trampolines);
5712 current_trampolines = NULL;
5715 /* create inner functions if any */
5716 entity_t **inner = inner_functions;
5717 if (inner != NULL) {
5718 ir_type *rem_outer_frame = current_outer_frame;
5719 current_outer_frame = get_irg_frame_type(current_ir_graph);
5720 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5721 create_function(inner[i]);
5725 current_outer_frame = rem_outer_frame;
5729 static void scope_to_firm(scope_t *scope)
5731 /* first pass: create declarations */
5732 entity_t *entity = scope->entities;
5733 for ( ; entity != NULL; entity = entity->base.next) {
5734 if (entity->base.symbol == NULL)
5737 if (entity->kind == ENTITY_FUNCTION) {
5738 if (entity->function.btk != BUILTIN_NONE) {
5739 /* builtins have no representation */
5742 (void)get_function_entity(entity, NULL);
5743 } else if (entity->kind == ENTITY_VARIABLE) {
5744 create_global_variable(entity);
5745 } else if (entity->kind == ENTITY_NAMESPACE) {
5746 scope_to_firm(&entity->namespacee.members);
5750 /* second pass: create code/initializers */
5751 entity = scope->entities;
5752 for ( ; entity != NULL; entity = entity->base.next) {
5753 if (entity->base.symbol == NULL)
5756 if (entity->kind == ENTITY_FUNCTION) {
5757 if (entity->function.btk != BUILTIN_NONE) {
5758 /* builtins have no representation */
5761 create_function(entity);
5762 } else if (entity->kind == ENTITY_VARIABLE) {
5763 assert(entity->declaration.kind
5764 == DECLARATION_KIND_GLOBAL_VARIABLE);
5765 current_ir_graph = get_const_code_irg();
5766 create_variable_initializer(entity);
5771 void init_ast2firm(void)
5773 obstack_init(&asm_obst);
5774 init_atomic_modes();
5776 ir_set_debug_retrieve(dbg_retrieve);
5777 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5779 /* create idents for all known runtime functions */
5780 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5781 rts_idents[i] = new_id_from_str(rts_data[i].name);
5784 entitymap_init(&entitymap);
5787 static void init_ir_types(void)
5789 static int ir_types_initialized = 0;
5790 if (ir_types_initialized)
5792 ir_types_initialized = 1;
5794 ir_type_int = get_ir_type(type_int);
5795 ir_type_char = get_ir_type(type_char);
5796 ir_type_const_char = get_ir_type(type_const_char);
5797 ir_type_wchar_t = get_ir_type(type_wchar_t);
5798 ir_type_void = get_ir_type(type_void);
5800 be_params = be_get_backend_param();
5801 mode_float_arithmetic = be_params->mode_float_arithmetic;
5803 stack_param_align = be_params->stack_param_align;
5806 void exit_ast2firm(void)
5808 entitymap_destroy(&entitymap);
5809 obstack_free(&asm_obst, NULL);
5812 static void global_asm_to_firm(statement_t *s)
5814 for (; s != NULL; s = s->base.next) {
5815 assert(s->kind == STATEMENT_ASM);
5817 char const *const text = s->asms.asm_text.begin;
5818 size_t size = s->asms.asm_text.size;
5820 /* skip the last \0 */
5821 if (text[size - 1] == '\0')
5824 ident *const id = new_id_from_chars(text, size);
5829 void translation_unit_to_firm(translation_unit_t *unit)
5831 /* initialize firm arithmetic */
5832 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5833 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5835 /* just to be sure */
5836 continue_label = NULL;
5838 current_switch = NULL;
5839 current_translation_unit = unit;
5843 scope_to_firm(&unit->scope);
5844 global_asm_to_firm(unit->global_asm);
5846 current_ir_graph = NULL;
5847 current_translation_unit = NULL;