2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
44 #include "diagnostic.h"
45 #include "lang_features.h"
47 #include "type_hash.h"
52 #include "entitymap_t.h"
53 #include "driver/firm_opt.h"
55 typedef struct trampoline_region trampoline_region;
56 struct trampoline_region {
57 ir_entity *function; /**< The function that is called by this trampoline */
58 ir_entity *region; /**< created region for the trampoline */
61 fp_model_t firm_fp_model = fp_model_precise;
63 static const backend_params *be_params;
65 static ir_type *ir_type_char;
66 static ir_type *ir_type_const_char;
67 static ir_type *ir_type_wchar_t;
69 /* architecture specific floating point arithmetic mode (if any) */
70 static ir_mode *mode_float_arithmetic;
72 /* alignment of stack parameters */
73 static unsigned stack_param_align;
75 static int next_value_number_function;
76 static ir_node *continue_label;
77 static ir_node *break_label;
78 static ir_node *current_switch;
79 static bool saw_default_label;
80 static label_t **all_labels;
81 static entity_t **inner_functions;
82 static ir_node *ijmp_list;
83 static bool constant_folding;
85 static const entity_t *current_function_entity;
86 static ir_node *current_function_name;
87 static ir_node *current_funcsig;
88 static ir_graph *current_function;
89 static translation_unit_t *current_translation_unit;
90 static trampoline_region *current_trampolines;
91 static ir_type *current_outer_frame;
92 static ir_node *current_static_link;
93 static ir_entity *current_vararg_entity;
95 static entitymap_t entitymap;
97 static struct obstack asm_obst;
99 typedef enum declaration_kind_t {
100 DECLARATION_KIND_UNKNOWN,
101 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
102 DECLARATION_KIND_GLOBAL_VARIABLE,
103 DECLARATION_KIND_LOCAL_VARIABLE,
104 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
105 DECLARATION_KIND_PARAMETER,
106 DECLARATION_KIND_PARAMETER_ENTITY,
107 DECLARATION_KIND_FUNCTION,
108 DECLARATION_KIND_COMPOUND_MEMBER,
109 DECLARATION_KIND_INNER_FUNCTION
110 } declaration_kind_t;
112 static ir_type *get_ir_type_incomplete(type_t *type);
114 static void enqueue_inner_function(entity_t *entity)
116 if (inner_functions == NULL)
117 inner_functions = NEW_ARR_F(entity_t *, 0);
118 ARR_APP1(entity_t*, inner_functions, entity);
121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
123 const entity_t *entity = get_irg_loc_description(irg, pos);
125 if (entity != NULL) {
126 source_position_t const *const pos = &entity->base.source_position;
127 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
129 return new_r_Unknown(irg, mode);
132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
134 source_position_t const *const pos = (source_position_t const*)dbg;
136 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
138 return (src_loc_t){ NULL, 0, 0 };
142 static dbg_info *get_dbg_info(const source_position_t *pos)
144 return (dbg_info*) pos;
147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
148 const type_dbg_info *dbg)
151 print_to_buffer(buffer, buffer_size);
152 const type_t *type = (const type_t*) dbg;
154 finish_print_to_buffer();
157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
159 return (type_dbg_info*) type;
162 /* is the current block a reachable one? */
163 static bool currently_reachable(void)
165 ir_node *const block = get_cur_block();
166 return block != NULL && !is_Bad(block);
169 static void set_unreachable_now(void)
174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
176 static ir_node *_expression_to_firm(const expression_t *expression);
177 static ir_node *expression_to_firm(const expression_t *expression);
179 static unsigned decide_modulo_shift(unsigned type_size)
181 if (architecture_modulo_shift == 0)
183 if (type_size < architecture_modulo_shift)
184 return architecture_modulo_shift;
188 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
190 unsigned flags = get_atomic_type_flags(kind);
191 unsigned size = get_atomic_type_size(kind);
192 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
193 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
196 } else if (size == 8) {
199 panic("unexpected kind");
201 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
203 unsigned bit_size = size * 8;
204 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
205 unsigned modulo_shift = decide_modulo_shift(bit_size);
207 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
208 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
216 * Initialises the atomic modes depending on the machine size.
218 static void init_atomic_modes(void)
220 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
221 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
222 if (atomic_modes[i] != NULL)
224 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
228 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
230 assert(kind <= ATOMIC_TYPE_LAST);
231 return atomic_modes[kind];
234 static ir_node *get_vla_size(array_type_t *const type)
236 ir_node *size_node = type->size_node;
237 if (size_node == NULL) {
238 size_node = expression_to_firm(type->size_expression);
239 type->size_node = size_node;
244 static unsigned count_parameters(const function_type_t *function_type)
248 function_parameter_t *parameter = function_type->parameters;
249 for ( ; parameter != NULL; parameter = parameter->next) {
257 * Creates a Firm type for an atomic type
259 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
261 ir_mode *mode = atomic_modes[akind];
262 type_dbg_info *dbgi = get_type_dbg_info_(type);
263 ir_type *irtype = new_d_type_primitive(mode, dbgi);
264 il_alignment_t alignment = get_atomic_type_alignment(akind);
266 set_type_size_bytes(irtype, get_atomic_type_size(akind));
267 set_type_alignment_bytes(irtype, alignment);
273 * Creates a Firm type for a complex type
275 static ir_type *create_complex_type(const atomic_type_t *type)
277 atomic_type_kind_t kind = type->akind;
278 ir_mode *mode = atomic_modes[kind];
279 ident *id = get_mode_ident(mode);
283 /* FIXME: finish the array */
288 * Creates a Firm type for an imaginary type
290 static ir_type *create_imaginary_type(const atomic_type_t *type)
292 return create_atomic_type(type->akind, (const type_t*)type);
296 * return type of a parameter (and take transparent union gnu extension into
299 static type_t *get_parameter_type(type_t *orig_type)
301 type_t *type = skip_typeref(orig_type);
302 if (is_type_union(type)
303 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
304 compound_t *compound = type->compound.compound;
305 type = compound->members.entities->declaration.type;
311 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
313 type_t *return_type = skip_typeref(function_type->return_type);
315 int n_parameters = count_parameters(function_type)
316 + (for_closure ? 1 : 0);
317 int n_results = is_type_void(return_type) ? 0 : 1;
318 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
319 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
321 if (!is_type_void(return_type)) {
322 ir_type *restype = get_ir_type(return_type);
323 set_method_res_type(irtype, 0, restype);
326 function_parameter_t *parameter = function_type->parameters;
329 ir_type *p_irtype = get_ir_type(type_void_ptr);
330 set_method_param_type(irtype, n, p_irtype);
333 for ( ; parameter != NULL; parameter = parameter->next) {
334 type_t *type = get_parameter_type(parameter->type);
335 ir_type *p_irtype = get_ir_type(type);
336 set_method_param_type(irtype, n, p_irtype);
340 bool is_variadic = function_type->variadic;
343 set_method_variadicity(irtype, variadicity_variadic);
345 unsigned cc = get_method_calling_convention(irtype);
346 switch (function_type->calling_convention) {
347 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
350 set_method_calling_convention(irtype, SET_CDECL(cc));
357 /* only non-variadic function can use stdcall, else use cdecl */
358 set_method_calling_convention(irtype, SET_STDCALL(cc));
364 /* only non-variadic function can use fastcall, else use cdecl */
365 set_method_calling_convention(irtype, SET_FASTCALL(cc));
369 /* Hmm, leave default, not accepted by the parser yet. */
374 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
376 const decl_modifiers_t modifiers = function_type->modifiers;
377 if (modifiers & DM_CONST)
378 add_method_additional_properties(irtype, mtp_property_const);
379 if (modifiers & DM_PURE)
380 add_method_additional_properties(irtype, mtp_property_pure);
381 if (modifiers & DM_RETURNS_TWICE)
382 add_method_additional_properties(irtype, mtp_property_returns_twice);
383 if (modifiers & DM_NORETURN)
384 add_method_additional_properties(irtype, mtp_property_noreturn);
385 if (modifiers & DM_NOTHROW)
386 add_method_additional_properties(irtype, mtp_property_nothrow);
387 if (modifiers & DM_MALLOC)
388 add_method_additional_properties(irtype, mtp_property_malloc);
393 static ir_type *create_pointer_type(pointer_type_t *type)
395 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
396 type_t *points_to = type->points_to;
397 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
398 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
403 static ir_type *create_reference_type(reference_type_t *type)
405 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
406 type_t *refers_to = type->refers_to;
407 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
408 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
413 static ir_type *create_array_type(array_type_t *type)
415 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
416 type_t *element_type = type->element_type;
417 ir_type *ir_element_type = get_ir_type(element_type);
418 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
420 const int align = get_type_alignment_bytes(ir_element_type);
421 set_type_alignment_bytes(irtype, align);
423 if (type->size_constant) {
424 int n_elements = type->size;
426 set_array_bounds_int(irtype, 0, 0, n_elements);
428 size_t elemsize = get_type_size_bytes(ir_element_type);
429 if (elemsize % align > 0) {
430 elemsize += align - (elemsize % align);
432 set_type_size_bytes(irtype, n_elements * elemsize);
434 set_array_lower_bound_int(irtype, 0, 0);
436 set_type_state(irtype, layout_fixed);
442 * Return the signed integer type of size bits.
444 * @param size the size
446 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
450 static ir_mode *s_modes[64 + 1] = {NULL, };
454 if (size <= 0 || size > 64)
457 mode = s_modes[size];
461 snprintf(name, sizeof(name), "bf_I%u", size);
462 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
463 s_modes[size] = mode;
466 type_dbg_info *dbgi = get_type_dbg_info_(type);
467 res = new_d_type_primitive(mode, dbgi);
468 set_primitive_base_type(res, base_tp);
474 * Return the unsigned integer type of size bits.
476 * @param size the size
478 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
482 static ir_mode *u_modes[64 + 1] = {NULL, };
486 if (size <= 0 || size > 64)
489 mode = u_modes[size];
493 snprintf(name, sizeof(name), "bf_U%u", size);
494 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
495 u_modes[size] = mode;
498 type_dbg_info *dbgi = get_type_dbg_info_(type);
499 res = new_d_type_primitive(mode, dbgi);
500 set_primitive_base_type(res, base_tp);
505 static ir_type *create_bitfield_type(const entity_t *entity)
507 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
508 type_t *base = skip_typeref(entity->declaration.type);
509 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
510 ir_type *irbase = get_ir_type(base);
512 unsigned bit_size = entity->compound_member.bit_size;
514 assert(!is_type_float(base));
515 if (is_type_signed(base)) {
516 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
518 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
523 * Construct firm type from ast struct type.
525 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
527 compound_t *compound = type->compound;
529 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
530 return compound->irtype;
533 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
535 symbol_t *type_symbol = compound->base.symbol;
537 if (type_symbol != NULL) {
538 id = new_id_from_str(type_symbol->string);
541 id = id_unique("__anonymous_union.%u");
543 id = id_unique("__anonymous_struct.%u");
549 irtype = new_type_union(id);
551 irtype = new_type_struct(id);
554 compound->irtype_complete = false;
555 compound->irtype = irtype;
561 layout_union_type(type);
563 layout_struct_type(type);
566 compound->irtype_complete = true;
568 entity_t *entry = compound->members.entities;
569 for ( ; entry != NULL; entry = entry->base.next) {
570 if (entry->kind != ENTITY_COMPOUND_MEMBER)
573 symbol_t *symbol = entry->base.symbol;
574 type_t *entry_type = entry->declaration.type;
576 if (symbol == NULL) {
577 /* anonymous bitfield member, skip */
578 if (entry->compound_member.bitfield)
580 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
581 || entry_type->kind == TYPE_COMPOUND_UNION);
582 ident = id_unique("anon.%u");
584 ident = new_id_from_str(symbol->string);
587 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
589 ir_type *entry_irtype;
590 if (entry->compound_member.bitfield) {
591 entry_irtype = create_bitfield_type(entry);
593 entry_irtype = get_ir_type(entry_type);
595 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
597 set_entity_offset(entity, entry->compound_member.offset);
598 set_entity_offset_bits_remainder(entity,
599 entry->compound_member.bit_offset);
601 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
602 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
603 entry->compound_member.entity = entity;
606 set_type_alignment_bytes(irtype, compound->alignment);
607 set_type_size_bytes(irtype, compound->size);
608 set_type_state(irtype, layout_fixed);
613 static ir_tarval *fold_constant_to_tarval(expression_t const *);
615 static void determine_enum_values(enum_type_t *const type)
617 ir_mode *const mode = atomic_modes[type->base.akind];
618 ir_tarval *const one = get_mode_one(mode);
619 ir_tarval * tv_next = get_mode_null(mode);
621 enum_t *enume = type->enume;
622 entity_t *entry = enume->base.next;
623 for (; entry != NULL; entry = entry->base.next) {
624 if (entry->kind != ENTITY_ENUM_VALUE)
627 expression_t *const init = entry->enum_value.value;
629 tv_next = fold_constant_to_tarval(init);
631 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
632 entry->enum_value.tv = tv_next;
633 tv_next = tarval_add(tv_next, one);
637 static ir_type *create_enum_type(enum_type_t *const type)
639 return create_atomic_type(type->base.akind, (const type_t*) type);
642 static ir_type *get_ir_type_incomplete(type_t *type)
644 assert(type != NULL);
645 type = skip_typeref(type);
647 if (type->base.firm_type != NULL) {
648 return type->base.firm_type;
651 if (is_type_compound(type)) {
652 return create_compound_type(&type->compound, true);
654 return get_ir_type(type);
658 ir_type *get_ir_type(type_t *type)
660 assert(type != NULL);
662 type = skip_typeref(type);
664 if (type->base.firm_type != NULL) {
665 return type->base.firm_type;
668 ir_type *firm_type = NULL;
669 switch (type->kind) {
671 firm_type = create_atomic_type(type->atomic.akind, type);
674 firm_type = create_complex_type(&type->atomic);
677 firm_type = create_imaginary_type(&type->atomic);
680 firm_type = create_method_type(&type->function, false);
683 firm_type = create_pointer_type(&type->pointer);
686 firm_type = create_reference_type(&type->reference);
689 firm_type = create_array_type(&type->array);
691 case TYPE_COMPOUND_STRUCT:
692 case TYPE_COMPOUND_UNION:
693 firm_type = create_compound_type(&type->compound, false);
696 firm_type = create_enum_type(&type->enumt);
704 if (firm_type == NULL)
705 panic("unknown type found");
707 type->base.firm_type = firm_type;
711 static ir_mode *get_ir_mode_storage(type_t *type)
713 type = skip_typeref(type);
715 /* Firm doesn't report a mode for arrays and structs/unions. */
716 if (!is_type_scalar(type)) {
720 ir_type *const irtype = get_ir_type(type);
721 ir_mode *const mode = get_type_mode(irtype);
722 assert(mode != NULL);
727 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
728 * int that it returns bigger modes for floating point on some platforms
729 * (x87 internally does arithemtic with 80bits)
731 static ir_mode *get_ir_mode_arithmetic(type_t *type)
733 ir_mode *mode = get_ir_mode_storage(type);
734 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
735 return mode_float_arithmetic;
742 * Return a node representing the size of a type.
744 static ir_node *get_type_size_node(type_t *type)
747 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
748 type = skip_typeref(type);
750 if (is_type_array(type) && type->array.is_vla) {
751 ir_node *size_node = get_vla_size(&type->array);
752 ir_node *elem_size = get_type_size_node(type->array.element_type);
753 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
757 size = get_type_size(type);
758 return new_Const_long(mode, size);
761 /** Names of the runtime functions. */
762 static const struct {
763 int id; /**< the rts id */
764 int n_res; /**< number of return values */
765 const char *name; /**< the name of the rts function */
766 int n_params; /**< number of parameters */
767 unsigned flags; /**< language flags */
769 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
770 { rts_abort, 0, "abort", 0, _C89 },
771 { rts_alloca, 1, "alloca", 1, _ALL },
772 { rts_abs, 1, "abs", 1, _C89 },
773 { rts_labs, 1, "labs", 1, _C89 },
774 { rts_llabs, 1, "llabs", 1, _C99 },
775 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
777 { rts_fabs, 1, "fabs", 1, _C89 },
778 { rts_sqrt, 1, "sqrt", 1, _C89 },
779 { rts_cbrt, 1, "cbrt", 1, _C99 },
780 { rts_exp, 1, "exp", 1, _C89 },
781 { rts_exp2, 1, "exp2", 1, _C89 },
782 { rts_exp10, 1, "exp10", 1, _GNUC },
783 { rts_log, 1, "log", 1, _C89 },
784 { rts_log2, 1, "log2", 1, _C89 },
785 { rts_log10, 1, "log10", 1, _C89 },
786 { rts_pow, 1, "pow", 2, _C89 },
787 { rts_sin, 1, "sin", 1, _C89 },
788 { rts_cos, 1, "cos", 1, _C89 },
789 { rts_tan, 1, "tan", 1, _C89 },
790 { rts_asin, 1, "asin", 1, _C89 },
791 { rts_acos, 1, "acos", 1, _C89 },
792 { rts_atan, 1, "atan", 1, _C89 },
793 { rts_sinh, 1, "sinh", 1, _C89 },
794 { rts_cosh, 1, "cosh", 1, _C89 },
795 { rts_tanh, 1, "tanh", 1, _C89 },
797 { rts_fabsf, 1, "fabsf", 1, _C99 },
798 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
799 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
800 { rts_expf, 1, "expf", 1, _C99 },
801 { rts_exp2f, 1, "exp2f", 1, _C99 },
802 { rts_exp10f, 1, "exp10f", 1, _GNUC },
803 { rts_logf, 1, "logf", 1, _C99 },
804 { rts_log2f, 1, "log2f", 1, _C99 },
805 { rts_log10f, 1, "log10f", 1, _C99 },
806 { rts_powf, 1, "powf", 2, _C99 },
807 { rts_sinf, 1, "sinf", 1, _C99 },
808 { rts_cosf, 1, "cosf", 1, _C99 },
809 { rts_tanf, 1, "tanf", 1, _C99 },
810 { rts_asinf, 1, "asinf", 1, _C99 },
811 { rts_acosf, 1, "acosf", 1, _C99 },
812 { rts_atanf, 1, "atanf", 1, _C99 },
813 { rts_sinhf, 1, "sinhf", 1, _C99 },
814 { rts_coshf, 1, "coshf", 1, _C99 },
815 { rts_tanhf, 1, "tanhf", 1, _C99 },
817 { rts_fabsl, 1, "fabsl", 1, _C99 },
818 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
819 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
820 { rts_expl, 1, "expl", 1, _C99 },
821 { rts_exp2l, 1, "exp2l", 1, _C99 },
822 { rts_exp10l, 1, "exp10l", 1, _GNUC },
823 { rts_logl, 1, "logl", 1, _C99 },
824 { rts_log2l, 1, "log2l", 1, _C99 },
825 { rts_log10l, 1, "log10l", 1, _C99 },
826 { rts_powl, 1, "powl", 2, _C99 },
827 { rts_sinl, 1, "sinl", 1, _C99 },
828 { rts_cosl, 1, "cosl", 1, _C99 },
829 { rts_tanl, 1, "tanl", 1, _C99 },
830 { rts_asinl, 1, "asinl", 1, _C99 },
831 { rts_acosl, 1, "acosl", 1, _C99 },
832 { rts_atanl, 1, "atanl", 1, _C99 },
833 { rts_sinhl, 1, "sinhl", 1, _C99 },
834 { rts_coshl, 1, "coshl", 1, _C99 },
835 { rts_tanhl, 1, "tanhl", 1, _C99 },
837 { rts_strcmp, 1, "strcmp", 2, _C89 },
838 { rts_strncmp, 1, "strncmp", 3, _C89 },
839 { rts_strcpy, 1, "strcpy", 2, _C89 },
840 { rts_strlen, 1, "strlen", 1, _C89 },
841 { rts_memcpy, 1, "memcpy", 3, _C89 },
842 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
843 { rts_memmove, 1, "memmove", 3, _C89 },
844 { rts_memset, 1, "memset", 3, _C89 },
845 { rts_memcmp, 1, "memcmp", 3, _C89 },
848 static ident *rts_idents[lengthof(rts_data)];
850 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
852 void set_create_ld_ident(ident *(*func)(entity_t*))
854 create_ld_ident = func;
857 static bool declaration_is_definition(const entity_t *entity)
859 switch (entity->kind) {
860 case ENTITY_VARIABLE:
861 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
862 case ENTITY_FUNCTION:
863 return entity->function.statement != NULL;
864 case ENTITY_PARAMETER:
865 case ENTITY_COMPOUND_MEMBER:
869 case ENTITY_ENUM_VALUE:
870 case ENTITY_NAMESPACE:
872 case ENTITY_LOCAL_LABEL:
875 panic("declaration_is_definition called on non-declaration");
879 * Handle GNU attributes for entities
881 * @param ent the entity
882 * @param decl the routine declaration
884 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
886 assert(is_declaration(entity));
887 decl_modifiers_t modifiers = entity->declaration.modifiers;
889 if (is_method_entity(irentity)) {
890 if (modifiers & DM_PURE) {
891 set_entity_additional_properties(irentity, mtp_property_pure);
893 if (modifiers & DM_CONST) {
894 add_entity_additional_properties(irentity, mtp_property_const);
897 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
898 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
900 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
901 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
902 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
906 static bool is_main(entity_t *entity)
908 static symbol_t *sym_main = NULL;
909 if (sym_main == NULL) {
910 sym_main = symbol_table_insert("main");
913 if (entity->base.symbol != sym_main)
915 /* must be in outermost scope */
916 if (entity->base.parent_scope != ¤t_translation_unit->scope)
923 * Creates an entity representing a function.
925 * @param entity the function declaration/definition
926 * @param owner_type the owner type of this function, NULL
927 * for global functions
929 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
931 assert(entity->kind == ENTITY_FUNCTION);
932 if (entity->function.irentity != NULL)
933 return entity->function.irentity;
935 switch (entity->function.btk) {
938 case BUILTIN_LIBC_CHECK:
944 symbol_t *symbol = entity->base.symbol;
945 ident *id = new_id_from_str(symbol->string);
947 /* already an entity defined? */
948 ir_entity *irentity = entitymap_get(&entitymap, symbol);
949 bool const has_body = entity->function.statement != NULL;
950 if (irentity != NULL) {
954 ir_type *ir_type_method;
955 if (entity->function.need_closure)
956 ir_type_method = create_method_type(&entity->declaration.type->function, true);
958 ir_type_method = get_ir_type(entity->declaration.type);
960 bool nested_function = false;
961 if (owner_type == NULL)
962 owner_type = get_glob_type();
964 nested_function = true;
966 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
967 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
971 ld_id = id_unique("inner.%u");
973 ld_id = create_ld_ident(entity);
974 set_entity_ld_ident(irentity, ld_id);
976 handle_decl_modifiers(irentity, entity);
978 if (! nested_function) {
979 storage_class_tag_t const storage_class
980 = (storage_class_tag_t) entity->declaration.storage_class;
981 if (storage_class == STORAGE_CLASS_STATIC) {
982 set_entity_visibility(irentity, ir_visibility_local);
984 set_entity_visibility(irentity, ir_visibility_external);
987 bool const is_inline = entity->function.is_inline;
988 if (is_inline && has_body) {
989 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
990 || ((c_mode & _C99) == 0
991 && storage_class == STORAGE_CLASS_EXTERN)) {
992 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
996 /* nested functions are always local */
997 set_entity_visibility(irentity, ir_visibility_local);
1000 /* We should check for file scope here, but as long as we compile C only
1001 this is not needed. */
1002 if (!freestanding && !has_body) {
1003 /* check for a known runtime function */
1004 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1005 if (id != rts_idents[i])
1008 function_type_t *function_type
1009 = &entity->declaration.type->function;
1010 /* rts_entities code can't handle a "wrong" number of parameters */
1011 if (function_type->unspecified_parameters)
1014 /* check number of parameters */
1015 int n_params = count_parameters(function_type);
1016 if (n_params != rts_data[i].n_params)
1019 type_t *return_type = skip_typeref(function_type->return_type);
1020 int n_res = is_type_void(return_type) ? 0 : 1;
1021 if (n_res != rts_data[i].n_res)
1024 /* ignore those rts functions not necessary needed for current mode */
1025 if ((c_mode & rts_data[i].flags) == 0)
1027 assert(rts_entities[rts_data[i].id] == NULL);
1028 rts_entities[rts_data[i].id] = irentity;
1032 entitymap_insert(&entitymap, symbol, irentity);
1035 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1036 entity->function.irentity = irentity;
1042 * Creates a SymConst for a given entity.
1044 * @param dbgi debug info
1045 * @param entity the entity
1047 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1049 assert(entity != NULL);
1050 union symconst_symbol sym;
1051 sym.entity_p = entity;
1052 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1055 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1057 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1060 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1063 if (is_Const(value)) {
1064 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1067 ir_node *cond = new_d_Cond(dbgi, value);
1068 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1069 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1070 ir_node *tblock = new_Block(1, &proj_true);
1071 ir_node *fblock = new_Block(1, &proj_false);
1072 set_cur_block(tblock);
1073 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1074 ir_node *tjump = new_Jmp();
1075 set_cur_block(fblock);
1076 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1077 ir_node *fjump = new_Jmp();
1079 ir_node *in[2] = { tjump, fjump };
1080 ir_node *mergeblock = new_Block(2, in);
1081 set_cur_block(mergeblock);
1082 ir_node *phi_in[2] = { const1, const0 };
1083 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1087 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1089 ir_mode *value_mode = get_irn_mode(value);
1091 if (value_mode == dest_mode)
1094 if (dest_mode == mode_b) {
1095 ir_node *zero = new_Const(get_mode_null(value_mode));
1096 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1098 } else if (value_mode == mode_b) {
1099 return create_conv_from_b(dbgi, value, dest_mode);
1102 return new_d_Conv(dbgi, value, dest_mode);
1106 * Creates a SymConst node representing a wide string literal.
1108 * @param literal the wide string literal
1110 static ir_node *wide_string_literal_to_firm(
1111 const string_literal_expression_t *literal)
1113 ir_type *const global_type = get_glob_type();
1114 ir_type *const elem_type = ir_type_wchar_t;
1115 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1116 ir_type *const type = new_type_array(1, elem_type);
1118 ident *const id = id_unique("str.%u");
1119 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1120 set_entity_ld_ident(entity, id);
1121 set_entity_visibility(entity, ir_visibility_private);
1122 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1124 ir_mode *const mode = get_type_mode(elem_type);
1125 const size_t slen = wstrlen(&literal->value);
1127 set_array_lower_bound_int(type, 0, 0);
1128 set_array_upper_bound_int(type, 0, slen);
1129 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1130 set_type_state(type, layout_fixed);
1132 ir_initializer_t *initializer = create_initializer_compound(slen);
1133 const char *p = literal->value.begin;
1134 for (size_t i = 0; i < slen; ++i) {
1135 assert(p < literal->value.begin + literal->value.size);
1136 utf32 v = read_utf8_char(&p);
1137 ir_tarval *tv = new_tarval_from_long(v, mode);
1138 ir_initializer_t *val = create_initializer_tarval(tv);
1139 set_initializer_compound_value(initializer, i, val);
1141 set_entity_initializer(entity, initializer);
1143 return create_symconst(dbgi, entity);
1147 * Creates a SymConst node representing a string constant.
1149 * @param src_pos the source position of the string constant
1150 * @param id_prefix a prefix for the name of the generated string constant
1151 * @param value the value of the string constant
1153 static ir_node *string_to_firm(const source_position_t *const src_pos,
1154 const char *const id_prefix,
1155 const string_t *const value)
1157 ir_type *const global_type = get_glob_type();
1158 dbg_info *const dbgi = get_dbg_info(src_pos);
1159 ir_type *const type = new_type_array(1, ir_type_const_char);
1161 ident *const id = id_unique(id_prefix);
1162 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1163 set_entity_ld_ident(entity, id);
1164 set_entity_visibility(entity, ir_visibility_private);
1165 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1167 ir_type *const elem_type = ir_type_const_char;
1168 ir_mode *const mode = get_type_mode(elem_type);
1170 const char* const string = value->begin;
1171 const size_t slen = value->size;
1173 set_array_lower_bound_int(type, 0, 0);
1174 set_array_upper_bound_int(type, 0, slen);
1175 set_type_size_bytes(type, slen);
1176 set_type_state(type, layout_fixed);
1178 ir_initializer_t *initializer = create_initializer_compound(slen);
1179 for (size_t i = 0; i < slen; ++i) {
1180 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1181 ir_initializer_t *val = create_initializer_tarval(tv);
1182 set_initializer_compound_value(initializer, i, val);
1184 set_entity_initializer(entity, initializer);
1186 return create_symconst(dbgi, entity);
1189 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1191 const char *string = literal->value.begin;
1192 size_t size = literal->value.size;
1194 assert(type->kind == TYPE_ATOMIC);
1195 atomic_type_kind_t akind = type->atomic.akind;
1197 ir_mode *const mode = atomic_modes[akind];
1198 ir_tarval *const tv = new_tarval_from_str(string, size, mode);
1199 if (tv == tarval_bad)
1202 literal->base.type = type;
1203 literal->target_value = tv;
1207 static void create_integer_tarval(literal_expression_t *literal)
1209 /* -1: signed only, 0: any, 1: unsigned only */
1210 int sign = literal->value.begin[0] != '0' /* decimal */ ? -1 : 0;
1212 const string_t *suffix = &literal->suffix;
1214 if (suffix->size > 0) {
1215 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1216 if (*c == 'u' || *c == 'U') sign = 1;
1217 if (*c == 'l' || *c == 'L') { ++ls; }
1221 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1223 /* now try if the constant is small enough for some types */
1224 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1226 if (sign <= 0 && try_create_integer(literal, type_int))
1228 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1232 if (sign <= 0 && try_create_integer(literal, type_long))
1234 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1237 /* last try? then we should not report tarval_bad */
1239 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1240 if (sign <= 0 && try_create_integer(literal, type_long_long))
1245 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246 bool res = try_create_integer(literal, type_unsigned_long_long);
1248 panic("internal error when parsing number literal");
1251 tarval_set_integer_overflow_mode(old_mode);
1254 void determine_literal_type(literal_expression_t *literal)
1256 switch (literal->base.kind) {
1257 case EXPR_LITERAL_INTEGER:
1258 create_integer_tarval(literal);
1266 * Creates a Const node representing a constant.
1268 static ir_node *literal_to_firm(const literal_expression_t *literal)
1270 type_t *type = skip_typeref(literal->base.type);
1271 ir_mode *mode = get_ir_mode_storage(type);
1272 const char *string = literal->value.begin;
1273 size_t size = literal->value.size;
1276 switch (literal->base.kind) {
1277 case EXPR_LITERAL_WIDE_CHARACTER: {
1278 utf32 v = read_utf8_char(&string);
1280 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1282 tv = new_tarval_from_str(buf, len, mode);
1286 case EXPR_LITERAL_CHARACTER: {
1289 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1290 if (size == 1 && char_is_signed) {
1291 v = (signed char)string[0];
1294 for (size_t i = 0; i < size; ++i) {
1295 v = (v << 8) | ((unsigned char)string[i]);
1299 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1301 tv = new_tarval_from_str(buf, len, mode);
1305 case EXPR_LITERAL_INTEGER:
1306 assert(literal->target_value != NULL);
1307 tv = literal->target_value;
1310 case EXPR_LITERAL_FLOATINGPOINT:
1311 tv = new_tarval_from_str(string, size, mode);
1314 case EXPR_LITERAL_BOOLEAN:
1315 if (string[0] == 't') {
1316 tv = get_mode_one(mode);
1318 assert(string[0] == 'f');
1319 case EXPR_LITERAL_MS_NOOP:
1320 tv = get_mode_null(mode);
1325 panic("Invalid literal kind found");
1328 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1329 ir_node *res = new_d_Const(dbgi, tv);
1330 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1331 return create_conv(dbgi, res, mode_arith);
1335 * Allocate an area of size bytes aligned at alignment
1338 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1340 static unsigned area_cnt = 0;
1343 ir_type *tp = new_type_array(1, ir_type_char);
1344 set_array_bounds_int(tp, 0, 0, size);
1345 set_type_alignment_bytes(tp, alignment);
1347 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1348 ident *name = new_id_from_str(buf);
1349 ir_entity *area = new_entity(frame_type, name, tp);
1351 /* mark this entity as compiler generated */
1352 set_entity_compiler_generated(area, 1);
1357 * Return a node representing a trampoline region
1358 * for a given function entity.
1360 * @param dbgi debug info
1361 * @param entity the function entity
1363 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1365 ir_entity *region = NULL;
1368 if (current_trampolines != NULL) {
1369 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1370 if (current_trampolines[i].function == entity) {
1371 region = current_trampolines[i].region;
1376 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1378 ir_graph *irg = current_ir_graph;
1379 if (region == NULL) {
1380 /* create a new region */
1381 ir_type *frame_tp = get_irg_frame_type(irg);
1382 trampoline_region reg;
1383 reg.function = entity;
1385 reg.region = alloc_trampoline(frame_tp,
1386 be_params->trampoline_size,
1387 be_params->trampoline_align);
1388 ARR_APP1(trampoline_region, current_trampolines, reg);
1389 region = reg.region;
1391 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1396 * Creates a trampoline for a function represented by an entity.
1398 * @param dbgi debug info
1399 * @param mode the (reference) mode for the function address
1400 * @param entity the function entity
1402 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1405 assert(entity != NULL);
1407 in[0] = get_trampoline_region(dbgi, entity);
1408 in[1] = create_symconst(dbgi, entity);
1409 in[2] = get_irg_frame(current_ir_graph);
1411 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1412 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1413 return new_Proj(irn, mode, pn_Builtin_max+1);
1417 * Dereference an address.
1419 * @param dbgi debug info
1420 * @param type the type of the dereferenced result (the points_to type)
1421 * @param addr the address to dereference
1423 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1424 ir_node *const addr)
1426 type_t *skipped = skip_typeref(type);
1427 if (is_type_incomplete(skipped))
1430 ir_type *irtype = get_ir_type(skipped);
1431 if (is_compound_type(irtype)
1432 || is_Method_type(irtype)
1433 || is_Array_type(irtype)) {
1437 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1438 ? cons_volatile : cons_none;
1439 ir_mode *const mode = get_type_mode(irtype);
1440 ir_node *const memory = get_store();
1441 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1442 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1443 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1445 set_store(load_mem);
1447 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1448 return create_conv(dbgi, load_res, mode_arithmetic);
1452 * Creates a strict Conv (to the node's mode) if necessary.
1454 * @param dbgi debug info
1455 * @param node the node to strict conv
1457 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1459 ir_mode *mode = get_irn_mode(node);
1461 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1463 if (!mode_is_float(mode))
1466 /* check if there is already a Conv */
1467 if (is_Conv(node)) {
1468 /* convert it into a strict Conv */
1469 set_Conv_strict(node, 1);
1473 /* otherwise create a new one */
1474 return new_d_strictConv(dbgi, node, mode);
1478 * Returns the correct base address depending on whether it is a parameter or a
1479 * normal local variable.
1481 static ir_node *get_local_frame(ir_entity *const ent)
1483 ir_graph *const irg = current_ir_graph;
1484 const ir_type *const owner = get_entity_owner(ent);
1485 if (owner == current_outer_frame) {
1486 assert(current_static_link != NULL);
1487 return current_static_link;
1489 return get_irg_frame(irg);
1494 * Keep all memory edges of the given block.
1496 static void keep_all_memory(ir_node *block)
1498 ir_node *old = get_cur_block();
1500 set_cur_block(block);
1501 keep_alive(get_store());
1502 /* TODO: keep all memory edges from restricted pointers */
1506 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1508 entity_t *entity = ref->entity;
1509 if (entity->enum_value.tv == NULL) {
1510 type_t *type = skip_typeref(entity->enum_value.enum_type);
1511 assert(type->kind == TYPE_ENUM);
1512 determine_enum_values(&type->enumt);
1515 return new_Const(entity->enum_value.tv);
1518 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1520 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1521 entity_t *entity = ref->entity;
1522 assert(is_declaration(entity));
1523 type_t *type = skip_typeref(entity->declaration.type);
1525 /* make sure the type is constructed */
1526 (void) get_ir_type(type);
1528 if (entity->kind == ENTITY_FUNCTION
1529 && entity->function.btk != BUILTIN_NONE) {
1530 ir_entity *irentity = get_function_entity(entity, NULL);
1531 /* for gcc compatibility we have to produce (dummy) addresses for some
1532 * builtins which don't have entities */
1533 if (irentity == NULL) {
1534 source_position_t const *const pos = &ref->base.source_position;
1535 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1537 /* simply create a NULL pointer */
1538 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1539 ir_node *res = new_Const(get_mode_null(mode));
1545 switch ((declaration_kind_t) entity->declaration.kind) {
1546 case DECLARATION_KIND_UNKNOWN:
1549 case DECLARATION_KIND_LOCAL_VARIABLE: {
1550 ir_mode *const mode = get_ir_mode_storage(type);
1551 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1552 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1554 case DECLARATION_KIND_PARAMETER: {
1555 ir_mode *const mode = get_ir_mode_storage(type);
1556 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1557 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1559 case DECLARATION_KIND_FUNCTION: {
1560 return create_symconst(dbgi, entity->function.irentity);
1562 case DECLARATION_KIND_INNER_FUNCTION: {
1563 ir_mode *const mode = get_ir_mode_storage(type);
1564 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1565 /* inner function not using the closure */
1566 return create_symconst(dbgi, entity->function.irentity);
1568 /* need trampoline here */
1569 return create_trampoline(dbgi, mode, entity->function.irentity);
1572 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1573 const variable_t *variable = &entity->variable;
1574 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1575 return deref_address(dbgi, variable->base.type, addr);
1578 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1579 ir_entity *irentity = entity->variable.v.entity;
1580 ir_node *frame = get_local_frame(irentity);
1581 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1582 return deref_address(dbgi, entity->declaration.type, sel);
1584 case DECLARATION_KIND_PARAMETER_ENTITY: {
1585 ir_entity *irentity = entity->parameter.v.entity;
1586 ir_node *frame = get_local_frame(irentity);
1587 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1588 return deref_address(dbgi, entity->declaration.type, sel);
1591 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1592 return entity->variable.v.vla_base;
1594 case DECLARATION_KIND_COMPOUND_MEMBER:
1595 panic("not implemented reference type");
1598 panic("reference to declaration with unknown type found");
1601 static ir_node *reference_addr(const reference_expression_t *ref)
1603 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1604 entity_t *entity = ref->entity;
1605 assert(is_declaration(entity));
1607 switch((declaration_kind_t) entity->declaration.kind) {
1608 case DECLARATION_KIND_UNKNOWN:
1610 case DECLARATION_KIND_PARAMETER:
1611 case DECLARATION_KIND_LOCAL_VARIABLE:
1612 /* you can store to a local variable (so we don't panic but return NULL
1613 * as an indicator for no real address) */
1615 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1616 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1619 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1620 ir_entity *irentity = entity->variable.v.entity;
1621 ir_node *frame = get_local_frame(irentity);
1622 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1626 case DECLARATION_KIND_PARAMETER_ENTITY: {
1627 ir_entity *irentity = entity->parameter.v.entity;
1628 ir_node *frame = get_local_frame(irentity);
1629 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1634 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1635 return entity->variable.v.vla_base;
1637 case DECLARATION_KIND_FUNCTION: {
1638 return create_symconst(dbgi, entity->function.irentity);
1641 case DECLARATION_KIND_INNER_FUNCTION: {
1642 type_t *const type = skip_typeref(entity->declaration.type);
1643 ir_mode *const mode = get_ir_mode_storage(type);
1644 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1645 /* inner function not using the closure */
1646 return create_symconst(dbgi, entity->function.irentity);
1648 /* need trampoline here */
1649 return create_trampoline(dbgi, mode, entity->function.irentity);
1653 case DECLARATION_KIND_COMPOUND_MEMBER:
1654 panic("not implemented reference type");
1657 panic("reference to declaration with unknown type found");
1661 * Transform calls to builtin functions.
1663 static ir_node *process_builtin_call(const call_expression_t *call)
1665 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1667 assert(call->function->kind == EXPR_REFERENCE);
1668 reference_expression_t *builtin = &call->function->reference;
1670 type_t *expr_type = skip_typeref(builtin->base.type);
1671 assert(is_type_pointer(expr_type));
1673 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1675 switch (builtin->entity->function.btk) {
1678 case BUILTIN_ALLOCA: {
1679 expression_t *argument = call->arguments->expression;
1680 ir_node *size = expression_to_firm(argument);
1682 ir_node *store = get_store();
1683 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1685 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1687 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1692 type_t *type = function_type->function.return_type;
1693 ir_mode *mode = get_ir_mode_arithmetic(type);
1694 ir_tarval *tv = get_mode_infinite(mode);
1695 ir_node *res = new_d_Const(dbgi, tv);
1699 /* Ignore string for now... */
1700 assert(is_type_function(function_type));
1701 type_t *type = function_type->function.return_type;
1702 ir_mode *mode = get_ir_mode_arithmetic(type);
1703 ir_tarval *tv = get_mode_NAN(mode);
1704 ir_node *res = new_d_Const(dbgi, tv);
1707 case BUILTIN_EXPECT: {
1708 expression_t *argument = call->arguments->expression;
1709 return _expression_to_firm(argument);
1711 case BUILTIN_VA_END:
1712 /* evaluate the argument of va_end for its side effects */
1713 _expression_to_firm(call->arguments->expression);
1715 case BUILTIN_OBJECT_SIZE: {
1716 /* determine value of "type" */
1717 expression_t *type_expression = call->arguments->next->expression;
1718 long type_val = fold_constant_to_int(type_expression);
1719 type_t *type = function_type->function.return_type;
1720 ir_mode *mode = get_ir_mode_arithmetic(type);
1721 /* just produce a "I don't know" result */
1722 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1723 get_mode_minus_one(mode);
1725 return new_d_Const(dbgi, result);
1727 case BUILTIN_ROTL: {
1728 ir_node *val = expression_to_firm(call->arguments->expression);
1729 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1730 ir_mode *mode = get_irn_mode(val);
1731 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1732 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1734 case BUILTIN_ROTR: {
1735 ir_node *val = expression_to_firm(call->arguments->expression);
1736 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1737 ir_mode *mode = get_irn_mode(val);
1738 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1739 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1740 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1741 return new_d_Rotl(dbgi, val, sub, mode);
1746 case BUILTIN_LIBC_CHECK:
1747 panic("builtin did not produce an entity");
1749 panic("invalid builtin found");
1753 * Transform a call expression.
1754 * Handles some special cases, like alloca() calls, which must be resolved
1755 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1756 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1759 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1761 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1762 assert(currently_reachable());
1764 expression_t *function = call->function;
1765 ir_node *callee = NULL;
1766 bool firm_builtin = false;
1767 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1768 if (function->kind == EXPR_REFERENCE) {
1769 const reference_expression_t *ref = &function->reference;
1770 entity_t *entity = ref->entity;
1772 if (entity->kind == ENTITY_FUNCTION) {
1773 builtin_kind_t builtin = entity->function.btk;
1774 if (builtin == BUILTIN_FIRM) {
1775 firm_builtin = true;
1776 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1777 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1778 && builtin != BUILTIN_LIBC_CHECK) {
1779 return process_builtin_call(call);
1784 callee = expression_to_firm(function);
1786 type_t *type = skip_typeref(function->base.type);
1787 assert(is_type_pointer(type));
1788 pointer_type_t *pointer_type = &type->pointer;
1789 type_t *points_to = skip_typeref(pointer_type->points_to);
1790 assert(is_type_function(points_to));
1791 function_type_t *function_type = &points_to->function;
1793 int n_parameters = 0;
1794 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1795 ir_type *new_method_type = NULL;
1796 if (function_type->variadic || function_type->unspecified_parameters) {
1797 const call_argument_t *argument = call->arguments;
1798 for ( ; argument != NULL; argument = argument->next) {
1802 /* we need to construct a new method type matching the call
1804 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1805 int n_res = get_method_n_ress(ir_method_type);
1806 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1807 set_method_calling_convention(new_method_type,
1808 get_method_calling_convention(ir_method_type));
1809 set_method_additional_properties(new_method_type,
1810 get_method_additional_properties(ir_method_type));
1811 set_method_variadicity(new_method_type,
1812 get_method_variadicity(ir_method_type));
1814 for (int i = 0; i < n_res; ++i) {
1815 set_method_res_type(new_method_type, i,
1816 get_method_res_type(ir_method_type, i));
1818 argument = call->arguments;
1819 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1820 expression_t *expression = argument->expression;
1821 ir_type *irtype = get_ir_type(expression->base.type);
1822 set_method_param_type(new_method_type, i, irtype);
1824 ir_method_type = new_method_type;
1826 n_parameters = get_method_n_params(ir_method_type);
1829 ir_node *in[n_parameters];
1831 const call_argument_t *argument = call->arguments;
1832 for (int n = 0; n < n_parameters; ++n) {
1833 expression_t *expression = argument->expression;
1834 ir_node *arg_node = expression_to_firm(expression);
1836 type_t *arg_type = skip_typeref(expression->base.type);
1837 if (!is_type_compound(arg_type)) {
1838 ir_mode *const mode = get_ir_mode_storage(arg_type);
1839 arg_node = create_conv(dbgi, arg_node, mode);
1840 arg_node = do_strict_conv(dbgi, arg_node);
1845 argument = argument->next;
1849 if (function_type->modifiers & DM_CONST) {
1850 store = get_irg_no_mem(current_ir_graph);
1852 store = get_store();
1856 type_t *return_type = skip_typeref(function_type->return_type);
1857 ir_node *result = NULL;
1859 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1861 if (! (function_type->modifiers & DM_CONST)) {
1862 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1866 if (!is_type_void(return_type)) {
1867 assert(is_type_scalar(return_type));
1868 ir_mode *mode = get_ir_mode_storage(return_type);
1869 result = new_Proj(node, mode, pn_Builtin_max+1);
1870 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1871 result = create_conv(NULL, result, mode_arith);
1874 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1875 if (! (function_type->modifiers & DM_CONST)) {
1876 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1880 if (!is_type_void(return_type)) {
1881 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1882 ir_mode *const mode = get_ir_mode_storage(return_type);
1883 result = new_Proj(resproj, mode, 0);
1884 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1885 result = create_conv(NULL, result, mode_arith);
1889 if (function_type->modifiers & DM_NORETURN) {
1890 /* A dead end: Keep the Call and the Block. Also place all further
1891 * nodes into a new and unreachable block. */
1893 keep_alive(get_cur_block());
1894 ir_node *block = new_Block(0, NULL);
1895 set_cur_block(block);
1901 static ir_node *statement_to_firm(statement_t *statement);
1902 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1904 static ir_node *expression_to_addr(const expression_t *expression);
1905 static ir_node *create_condition_evaluation(const expression_t *expression,
1906 ir_node *true_block,
1907 ir_node *false_block);
1909 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1912 if (!is_type_compound(type)) {
1913 ir_mode *mode = get_ir_mode_storage(type);
1914 value = create_conv(dbgi, value, mode);
1915 value = do_strict_conv(dbgi, value);
1918 ir_node *memory = get_store();
1920 if (is_type_scalar(type)) {
1921 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1922 ? cons_volatile : cons_none;
1923 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1924 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1925 set_store(store_mem);
1927 ir_type *irtype = get_ir_type(type);
1928 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1929 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1930 set_store(copyb_mem);
1934 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1936 ir_tarval *all_one = get_mode_all_one(mode);
1937 int mode_size = get_mode_size_bits(mode);
1938 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1940 assert(offset >= 0);
1942 assert(offset + size <= mode_size);
1943 if (size == mode_size) {
1947 long shiftr = get_mode_size_bits(mode) - size;
1948 long shiftl = offset;
1949 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1950 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1951 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1952 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1957 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1958 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1961 ir_type *entity_type = get_entity_type(entity);
1962 ir_type *base_type = get_primitive_base_type(entity_type);
1963 ir_mode *mode = get_type_mode(base_type);
1964 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1966 value = create_conv(dbgi, value, mode);
1968 /* kill upper bits of value and shift to right position */
1969 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1970 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1971 unsigned base_bits = get_mode_size_bits(mode);
1972 unsigned shiftwidth = base_bits - bitsize;
1974 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1975 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1977 unsigned shrwidth = base_bits - bitsize - bitoffset;
1978 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1979 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1981 /* load current value */
1982 ir_node *mem = get_store();
1983 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1984 set_volatile ? cons_volatile : cons_none);
1985 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1986 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1987 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1988 ir_tarval *inv_mask = tarval_not(shift_mask);
1989 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1990 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1992 /* construct new value and store */
1993 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1994 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1995 set_volatile ? cons_volatile : cons_none);
1996 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1997 set_store(store_mem);
2003 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2004 if (mode_is_signed(mode)) {
2005 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2007 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2012 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2015 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2016 entity_t *entity = expression->compound_entry;
2017 type_t *base_type = entity->declaration.type;
2018 ir_mode *mode = get_ir_mode_storage(base_type);
2019 ir_node *mem = get_store();
2020 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2021 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2022 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2023 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2025 ir_mode *amode = mode;
2026 /* optimisation, since shifting in modes < machine_size is usually
2028 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2031 unsigned amode_size = get_mode_size_bits(amode);
2032 load_res = create_conv(dbgi, load_res, amode);
2034 set_store(load_mem);
2036 /* kill upper bits */
2037 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2038 unsigned bitoffset = entity->compound_member.bit_offset;
2039 unsigned bitsize = entity->compound_member.bit_size;
2040 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
2041 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
2042 ir_node *countl = new_d_Const(dbgi, tvl);
2043 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
2045 unsigned shift_bitsr = bitoffset + shift_bitsl;
2046 assert(shift_bitsr <= amode_size);
2047 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
2048 ir_node *countr = new_d_Const(dbgi, tvr);
2050 if (mode_is_signed(mode)) {
2051 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2053 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2056 type_t *type = expression->base.type;
2057 ir_mode *resmode = get_ir_mode_arithmetic(type);
2058 return create_conv(dbgi, shiftr, resmode);
2061 /* make sure the selected compound type is constructed */
2062 static void construct_select_compound(const select_expression_t *expression)
2064 type_t *type = skip_typeref(expression->compound->base.type);
2065 if (is_type_pointer(type)) {
2066 type = type->pointer.points_to;
2068 (void) get_ir_type(type);
2071 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2072 ir_node *value, ir_node *addr)
2074 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2075 type_t *type = skip_typeref(expression->base.type);
2077 if (!is_type_compound(type)) {
2078 ir_mode *mode = get_ir_mode_storage(type);
2079 value = create_conv(dbgi, value, mode);
2080 value = do_strict_conv(dbgi, value);
2083 if (expression->kind == EXPR_REFERENCE) {
2084 const reference_expression_t *ref = &expression->reference;
2086 entity_t *entity = ref->entity;
2087 assert(is_declaration(entity));
2088 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2089 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2090 set_value(entity->variable.v.value_number, value);
2092 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2093 set_value(entity->parameter.v.value_number, value);
2099 addr = expression_to_addr(expression);
2100 assert(addr != NULL);
2102 if (expression->kind == EXPR_SELECT) {
2103 const select_expression_t *select = &expression->select;
2105 construct_select_compound(select);
2107 entity_t *entity = select->compound_entry;
2108 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2109 if (entity->compound_member.bitfield) {
2110 ir_entity *irentity = entity->compound_member.entity;
2112 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2113 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2114 set_volatile, true);
2119 assign_value(dbgi, addr, type, value);
2123 static void set_value_for_expression(const expression_t *expression,
2126 set_value_for_expression_addr(expression, value, NULL);
2129 static ir_node *get_value_from_lvalue(const expression_t *expression,
2132 if (expression->kind == EXPR_REFERENCE) {
2133 const reference_expression_t *ref = &expression->reference;
2135 entity_t *entity = ref->entity;
2136 assert(entity->kind == ENTITY_VARIABLE
2137 || entity->kind == ENTITY_PARAMETER);
2138 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2140 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2141 value_number = entity->variable.v.value_number;
2142 assert(addr == NULL);
2143 type_t *type = skip_typeref(expression->base.type);
2144 ir_mode *mode = get_ir_mode_storage(type);
2145 ir_node *res = get_value(value_number, mode);
2146 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2147 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2148 value_number = entity->parameter.v.value_number;
2149 assert(addr == NULL);
2150 type_t *type = skip_typeref(expression->base.type);
2151 ir_mode *mode = get_ir_mode_storage(type);
2152 ir_node *res = get_value(value_number, mode);
2153 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2157 assert(addr != NULL);
2158 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2161 if (expression->kind == EXPR_SELECT &&
2162 expression->select.compound_entry->compound_member.bitfield) {
2163 construct_select_compound(&expression->select);
2164 value = bitfield_extract_to_firm(&expression->select, addr);
2166 value = deref_address(dbgi, expression->base.type, addr);
2173 static ir_node *create_incdec(const unary_expression_t *expression)
2175 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2176 const expression_t *value_expr = expression->value;
2177 ir_node *addr = expression_to_addr(value_expr);
2178 ir_node *value = get_value_from_lvalue(value_expr, addr);
2180 type_t *type = skip_typeref(expression->base.type);
2181 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2184 if (is_type_pointer(type)) {
2185 pointer_type_t *pointer_type = &type->pointer;
2186 offset = get_type_size_node(pointer_type->points_to);
2188 assert(is_type_arithmetic(type));
2189 offset = new_Const(get_mode_one(mode));
2193 ir_node *store_value;
2194 switch(expression->base.kind) {
2195 case EXPR_UNARY_POSTFIX_INCREMENT:
2197 store_value = new_d_Add(dbgi, value, offset, mode);
2199 case EXPR_UNARY_POSTFIX_DECREMENT:
2201 store_value = new_d_Sub(dbgi, value, offset, mode);
2203 case EXPR_UNARY_PREFIX_INCREMENT:
2204 result = new_d_Add(dbgi, value, offset, mode);
2205 store_value = result;
2207 case EXPR_UNARY_PREFIX_DECREMENT:
2208 result = new_d_Sub(dbgi, value, offset, mode);
2209 store_value = result;
2212 panic("no incdec expr in create_incdec");
2215 set_value_for_expression_addr(value_expr, store_value, addr);
2220 static bool is_local_variable(expression_t *expression)
2222 if (expression->kind != EXPR_REFERENCE)
2224 reference_expression_t *ref_expr = &expression->reference;
2225 entity_t *entity = ref_expr->entity;
2226 if (entity->kind != ENTITY_VARIABLE)
2228 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2229 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2232 static ir_relation get_relation(const expression_kind_t kind)
2235 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2236 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2237 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2238 case EXPR_BINARY_ISLESS:
2239 case EXPR_BINARY_LESS: return ir_relation_less;
2240 case EXPR_BINARY_ISLESSEQUAL:
2241 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2242 case EXPR_BINARY_ISGREATER:
2243 case EXPR_BINARY_GREATER: return ir_relation_greater;
2244 case EXPR_BINARY_ISGREATEREQUAL:
2245 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2246 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2251 panic("trying to get pn_Cmp from non-comparison binexpr type");
2255 * Handle the assume optimizer hint: check if a Confirm
2256 * node can be created.
2258 * @param dbi debug info
2259 * @param expr the IL assume expression
2261 * we support here only some simple cases:
2266 static ir_node *handle_assume_compare(dbg_info *dbi,
2267 const binary_expression_t *expression)
2269 expression_t *op1 = expression->left;
2270 expression_t *op2 = expression->right;
2271 entity_t *var2, *var = NULL;
2272 ir_node *res = NULL;
2273 ir_relation relation = get_relation(expression->base.kind);
2275 if (is_local_variable(op1) && is_local_variable(op2)) {
2276 var = op1->reference.entity;
2277 var2 = op2->reference.entity;
2279 type_t *const type = skip_typeref(var->declaration.type);
2280 ir_mode *const mode = get_ir_mode_storage(type);
2282 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2283 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2285 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2286 set_value(var2->variable.v.value_number, res);
2288 res = new_d_Confirm(dbi, irn1, irn2, relation);
2289 set_value(var->variable.v.value_number, res);
2294 expression_t *con = NULL;
2295 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2296 var = op1->reference.entity;
2298 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2299 relation = get_inversed_relation(relation);
2300 var = op2->reference.entity;
2305 type_t *const type = skip_typeref(var->declaration.type);
2306 ir_mode *const mode = get_ir_mode_storage(type);
2308 res = get_value(var->variable.v.value_number, mode);
2309 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2310 set_value(var->variable.v.value_number, res);
2316 * Handle the assume optimizer hint.
2318 * @param dbi debug info
2319 * @param expr the IL assume expression
2321 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2323 switch(expression->kind) {
2324 case EXPR_BINARY_EQUAL:
2325 case EXPR_BINARY_NOTEQUAL:
2326 case EXPR_BINARY_LESS:
2327 case EXPR_BINARY_LESSEQUAL:
2328 case EXPR_BINARY_GREATER:
2329 case EXPR_BINARY_GREATEREQUAL:
2330 return handle_assume_compare(dbi, &expression->binary);
2336 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2337 type_t *from_type, type_t *type)
2339 type = skip_typeref(type);
2340 if (is_type_void(type)) {
2341 /* make sure firm type is constructed */
2342 (void) get_ir_type(type);
2345 if (!is_type_scalar(type)) {
2346 /* make sure firm type is constructed */
2347 (void) get_ir_type(type);
2351 from_type = skip_typeref(from_type);
2352 ir_mode *mode = get_ir_mode_storage(type);
2353 /* check for conversion from / to __based types */
2354 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2355 const variable_t *from_var = from_type->pointer.base_variable;
2356 const variable_t *to_var = type->pointer.base_variable;
2357 if (from_var != to_var) {
2358 if (from_var != NULL) {
2359 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2360 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2361 value_node = new_d_Add(dbgi, value_node, base, mode);
2363 if (to_var != NULL) {
2364 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2365 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2366 value_node = new_d_Sub(dbgi, value_node, base, mode);
2371 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2372 /* bool adjustments (we save a mode_Bu, but have to temporarily
2373 * convert to mode_b so we only get a 0/1 value */
2374 value_node = create_conv(dbgi, value_node, mode_b);
2377 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2378 ir_node *node = create_conv(dbgi, value_node, mode);
2379 node = do_strict_conv(dbgi, node);
2380 node = create_conv(dbgi, node, mode_arith);
2385 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2387 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2388 type_t *type = skip_typeref(expression->base.type);
2390 const expression_t *value = expression->value;
2392 switch(expression->base.kind) {
2393 case EXPR_UNARY_TAKE_ADDRESS:
2394 return expression_to_addr(value);
2396 case EXPR_UNARY_NEGATE: {
2397 ir_node *value_node = expression_to_firm(value);
2398 ir_mode *mode = get_ir_mode_arithmetic(type);
2399 return new_d_Minus(dbgi, value_node, mode);
2401 case EXPR_UNARY_PLUS:
2402 return expression_to_firm(value);
2403 case EXPR_UNARY_BITWISE_NEGATE: {
2404 ir_node *value_node = expression_to_firm(value);
2405 ir_mode *mode = get_ir_mode_arithmetic(type);
2406 return new_d_Not(dbgi, value_node, mode);
2408 case EXPR_UNARY_NOT: {
2409 ir_node *value_node = _expression_to_firm(value);
2410 value_node = create_conv(dbgi, value_node, mode_b);
2411 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2414 case EXPR_UNARY_DEREFERENCE: {
2415 ir_node *value_node = expression_to_firm(value);
2416 type_t *value_type = skip_typeref(value->base.type);
2417 assert(is_type_pointer(value_type));
2419 /* check for __based */
2420 const variable_t *const base_var = value_type->pointer.base_variable;
2421 if (base_var != NULL) {
2422 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2423 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2424 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2426 type_t *points_to = value_type->pointer.points_to;
2427 return deref_address(dbgi, points_to, value_node);
2429 case EXPR_UNARY_POSTFIX_INCREMENT:
2430 case EXPR_UNARY_POSTFIX_DECREMENT:
2431 case EXPR_UNARY_PREFIX_INCREMENT:
2432 case EXPR_UNARY_PREFIX_DECREMENT:
2433 return create_incdec(expression);
2434 case EXPR_UNARY_CAST: {
2435 ir_node *value_node = expression_to_firm(value);
2436 type_t *from_type = value->base.type;
2437 return create_cast(dbgi, value_node, from_type, type);
2439 case EXPR_UNARY_ASSUME:
2440 return handle_assume(dbgi, value);
2445 panic("invalid UNEXPR type found");
2449 * produces a 0/1 depending of the value of a mode_b node
2451 static ir_node *produce_condition_result(const expression_t *expression,
2452 ir_mode *mode, dbg_info *dbgi)
2454 ir_node *const one_block = new_immBlock();
2455 ir_node *const zero_block = new_immBlock();
2456 create_condition_evaluation(expression, one_block, zero_block);
2457 mature_immBlock(one_block);
2458 mature_immBlock(zero_block);
2460 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2461 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2462 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2463 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2464 set_cur_block(block);
2466 ir_node *const one = new_Const(get_mode_one(mode));
2467 ir_node *const zero = new_Const(get_mode_null(mode));
2468 ir_node *const in[2] = { one, zero };
2469 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2474 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2475 ir_node *value, type_t *type)
2477 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2478 assert(is_type_pointer(type));
2479 pointer_type_t *const pointer_type = &type->pointer;
2480 type_t *const points_to = skip_typeref(pointer_type->points_to);
2481 ir_node * elem_size = get_type_size_node(points_to);
2482 elem_size = create_conv(dbgi, elem_size, mode);
2483 value = create_conv(dbgi, value, mode);
2484 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2488 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2489 ir_node *left, ir_node *right)
2492 type_t *type_left = skip_typeref(expression->left->base.type);
2493 type_t *type_right = skip_typeref(expression->right->base.type);
2495 expression_kind_t kind = expression->base.kind;
2498 case EXPR_BINARY_SHIFTLEFT:
2499 case EXPR_BINARY_SHIFTRIGHT:
2500 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2501 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2502 mode = get_ir_mode_arithmetic(expression->base.type);
2503 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2506 case EXPR_BINARY_SUB:
2507 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2508 const pointer_type_t *const ptr_type = &type_left->pointer;
2510 mode = get_ir_mode_arithmetic(expression->base.type);
2511 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2512 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2513 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2514 ir_node *const no_mem = new_NoMem();
2515 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2516 mode, op_pin_state_floats);
2517 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2520 case EXPR_BINARY_SUB_ASSIGN:
2521 if (is_type_pointer(type_left)) {
2522 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2523 mode = get_ir_mode_arithmetic(type_left);
2528 case EXPR_BINARY_ADD:
2529 case EXPR_BINARY_ADD_ASSIGN:
2530 if (is_type_pointer(type_left)) {
2531 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2532 mode = get_ir_mode_arithmetic(type_left);
2534 } else if (is_type_pointer(type_right)) {
2535 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2536 mode = get_ir_mode_arithmetic(type_right);
2543 mode = get_ir_mode_arithmetic(type_right);
2544 left = create_conv(dbgi, left, mode);
2549 case EXPR_BINARY_ADD_ASSIGN:
2550 case EXPR_BINARY_ADD:
2551 return new_d_Add(dbgi, left, right, mode);
2552 case EXPR_BINARY_SUB_ASSIGN:
2553 case EXPR_BINARY_SUB:
2554 return new_d_Sub(dbgi, left, right, mode);
2555 case EXPR_BINARY_MUL_ASSIGN:
2556 case EXPR_BINARY_MUL:
2557 return new_d_Mul(dbgi, left, right, mode);
2558 case EXPR_BINARY_BITWISE_AND:
2559 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2560 return new_d_And(dbgi, left, right, mode);
2561 case EXPR_BINARY_BITWISE_OR:
2562 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2563 return new_d_Or(dbgi, left, right, mode);
2564 case EXPR_BINARY_BITWISE_XOR:
2565 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2566 return new_d_Eor(dbgi, left, right, mode);
2567 case EXPR_BINARY_SHIFTLEFT:
2568 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2569 return new_d_Shl(dbgi, left, right, mode);
2570 case EXPR_BINARY_SHIFTRIGHT:
2571 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2572 if (mode_is_signed(mode)) {
2573 return new_d_Shrs(dbgi, left, right, mode);
2575 return new_d_Shr(dbgi, left, right, mode);
2577 case EXPR_BINARY_DIV:
2578 case EXPR_BINARY_DIV_ASSIGN: {
2579 ir_node *pin = new_Pin(new_NoMem());
2580 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2581 op_pin_state_floats);
2582 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2585 case EXPR_BINARY_MOD:
2586 case EXPR_BINARY_MOD_ASSIGN: {
2587 ir_node *pin = new_Pin(new_NoMem());
2588 assert(!mode_is_float(mode));
2589 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2590 op_pin_state_floats);
2591 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2595 panic("unexpected expression kind");
2599 static ir_node *create_lazy_op(const binary_expression_t *expression)
2601 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2602 type_t *type = skip_typeref(expression->base.type);
2603 ir_mode *mode = get_ir_mode_arithmetic(type);
2605 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2606 bool val = fold_constant_to_bool(expression->left);
2607 expression_kind_t ekind = expression->base.kind;
2608 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2609 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2611 return new_Const(get_mode_null(mode));
2615 return new_Const(get_mode_one(mode));
2619 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2620 bool valr = fold_constant_to_bool(expression->right);
2621 return create_Const_from_bool(mode, valr);
2624 return produce_condition_result(expression->right, mode, dbgi);
2627 return produce_condition_result((const expression_t*) expression, mode,
2631 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2632 ir_node *right, ir_mode *mode);
2634 static ir_node *create_assign_binop(const binary_expression_t *expression)
2636 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2637 const expression_t *left_expr = expression->left;
2638 type_t *type = skip_typeref(left_expr->base.type);
2639 ir_node *right = expression_to_firm(expression->right);
2640 ir_node *left_addr = expression_to_addr(left_expr);
2641 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2642 ir_node *result = create_op(dbgi, expression, left, right);
2644 result = create_cast(dbgi, result, expression->right->base.type, type);
2645 result = do_strict_conv(dbgi, result);
2647 result = set_value_for_expression_addr(left_expr, result, left_addr);
2649 if (!is_type_compound(type)) {
2650 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2651 result = create_conv(dbgi, result, mode_arithmetic);
2656 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2658 expression_kind_t kind = expression->base.kind;
2661 case EXPR_BINARY_EQUAL:
2662 case EXPR_BINARY_NOTEQUAL:
2663 case EXPR_BINARY_LESS:
2664 case EXPR_BINARY_LESSEQUAL:
2665 case EXPR_BINARY_GREATER:
2666 case EXPR_BINARY_GREATEREQUAL:
2667 case EXPR_BINARY_ISGREATER:
2668 case EXPR_BINARY_ISGREATEREQUAL:
2669 case EXPR_BINARY_ISLESS:
2670 case EXPR_BINARY_ISLESSEQUAL:
2671 case EXPR_BINARY_ISLESSGREATER:
2672 case EXPR_BINARY_ISUNORDERED: {
2673 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2674 ir_node *left = expression_to_firm(expression->left);
2675 ir_node *right = expression_to_firm(expression->right);
2676 ir_relation relation = get_relation(kind);
2677 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2680 case EXPR_BINARY_ASSIGN: {
2681 ir_node *addr = expression_to_addr(expression->left);
2682 ir_node *right = expression_to_firm(expression->right);
2684 = set_value_for_expression_addr(expression->left, right, addr);
2686 type_t *type = skip_typeref(expression->base.type);
2687 if (!is_type_compound(type)) {
2688 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2689 res = create_conv(NULL, res, mode_arithmetic);
2693 case EXPR_BINARY_ADD:
2694 case EXPR_BINARY_SUB:
2695 case EXPR_BINARY_MUL:
2696 case EXPR_BINARY_DIV:
2697 case EXPR_BINARY_MOD:
2698 case EXPR_BINARY_BITWISE_AND:
2699 case EXPR_BINARY_BITWISE_OR:
2700 case EXPR_BINARY_BITWISE_XOR:
2701 case EXPR_BINARY_SHIFTLEFT:
2702 case EXPR_BINARY_SHIFTRIGHT:
2704 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2705 ir_node *left = expression_to_firm(expression->left);
2706 ir_node *right = expression_to_firm(expression->right);
2707 return create_op(dbgi, expression, left, right);
2709 case EXPR_BINARY_LOGICAL_AND:
2710 case EXPR_BINARY_LOGICAL_OR:
2711 return create_lazy_op(expression);
2712 case EXPR_BINARY_COMMA:
2713 /* create side effects of left side */
2714 (void) expression_to_firm(expression->left);
2715 return _expression_to_firm(expression->right);
2717 case EXPR_BINARY_ADD_ASSIGN:
2718 case EXPR_BINARY_SUB_ASSIGN:
2719 case EXPR_BINARY_MUL_ASSIGN:
2720 case EXPR_BINARY_MOD_ASSIGN:
2721 case EXPR_BINARY_DIV_ASSIGN:
2722 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2723 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2724 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2725 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2726 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2727 return create_assign_binop(expression);
2729 panic("TODO binexpr type");
2733 static ir_node *array_access_addr(const array_access_expression_t *expression)
2735 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2736 ir_node *base_addr = expression_to_firm(expression->array_ref);
2737 ir_node *offset = expression_to_firm(expression->index);
2738 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2739 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2740 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2745 static ir_node *array_access_to_firm(
2746 const array_access_expression_t *expression)
2748 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2749 ir_node *addr = array_access_addr(expression);
2750 type_t *type = revert_automatic_type_conversion(
2751 (const expression_t*) expression);
2752 type = skip_typeref(type);
2754 return deref_address(dbgi, type, addr);
2757 static long get_offsetof_offset(const offsetof_expression_t *expression)
2759 type_t *orig_type = expression->type;
2762 designator_t *designator = expression->designator;
2763 for ( ; designator != NULL; designator = designator->next) {
2764 type_t *type = skip_typeref(orig_type);
2765 /* be sure the type is constructed */
2766 (void) get_ir_type(type);
2768 if (designator->symbol != NULL) {
2769 assert(is_type_compound(type));
2770 symbol_t *symbol = designator->symbol;
2772 compound_t *compound = type->compound.compound;
2773 entity_t *iter = compound->members.entities;
2774 for ( ; iter != NULL; iter = iter->base.next) {
2775 if (iter->base.symbol == symbol) {
2779 assert(iter != NULL);
2781 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2782 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2783 offset += get_entity_offset(iter->compound_member.entity);
2785 orig_type = iter->declaration.type;
2787 expression_t *array_index = designator->array_index;
2788 assert(designator->array_index != NULL);
2789 assert(is_type_array(type));
2791 long index = fold_constant_to_int(array_index);
2792 ir_type *arr_type = get_ir_type(type);
2793 ir_type *elem_type = get_array_element_type(arr_type);
2794 long elem_size = get_type_size_bytes(elem_type);
2796 offset += index * elem_size;
2798 orig_type = type->array.element_type;
2805 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2807 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2808 long offset = get_offsetof_offset(expression);
2809 ir_tarval *tv = new_tarval_from_long(offset, mode);
2810 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2812 return new_d_Const(dbgi, tv);
2815 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2816 ir_entity *entity, type_t *type);
2817 static ir_initializer_t *create_ir_initializer(
2818 const initializer_t *initializer, type_t *type);
2820 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2821 initializer_t *initializer,
2824 /* create the ir_initializer */
2825 ir_graph *const old_current_ir_graph = current_ir_graph;
2826 current_ir_graph = get_const_code_irg();
2828 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2830 assert(current_ir_graph == get_const_code_irg());
2831 current_ir_graph = old_current_ir_graph;
2833 ident *const id = id_unique("initializer.%u");
2834 ir_type *const irtype = get_ir_type(type);
2835 ir_type *const global_type = get_glob_type();
2836 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2837 set_entity_ld_ident(entity, id);
2838 set_entity_visibility(entity, ir_visibility_private);
2839 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2840 set_entity_initializer(entity, irinitializer);
2844 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2846 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2847 type_t *type = expression->type;
2848 initializer_t *initializer = expression->initializer;
2850 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2851 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2852 return create_symconst(dbgi, entity);
2854 /* create an entity on the stack */
2855 ident *const id = id_unique("CompLit.%u");
2856 ir_type *const irtype = get_ir_type(type);
2857 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2859 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2860 set_entity_ld_ident(entity, id);
2862 /* create initialisation code */
2863 create_local_initializer(initializer, dbgi, entity, type);
2865 /* create a sel for the compound literal address */
2866 ir_node *frame = get_irg_frame(current_ir_graph);
2867 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2872 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2874 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2875 type_t *const type = expr->type;
2876 ir_node *const addr = compound_literal_addr(expr);
2877 return deref_address(dbgi, type, addr);
2881 * Transform a sizeof expression into Firm code.
2883 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2885 type_t *const type = skip_typeref(expression->type);
2886 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2887 if (is_type_array(type) && type->array.is_vla
2888 && expression->tp_expression != NULL) {
2889 expression_to_firm(expression->tp_expression);
2892 return get_type_size_node(type);
2895 static entity_t *get_expression_entity(const expression_t *expression)
2897 if (expression->kind != EXPR_REFERENCE)
2900 return expression->reference.entity;
2903 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2905 switch(entity->kind) {
2906 case DECLARATION_KIND_CASES:
2907 return entity->declaration.alignment;
2910 return entity->compound.alignment;
2911 case ENTITY_TYPEDEF:
2912 return entity->typedefe.alignment;
2920 * Transform an alignof expression into Firm code.
2922 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2924 unsigned alignment = 0;
2926 const expression_t *tp_expression = expression->tp_expression;
2927 if (tp_expression != NULL) {
2928 entity_t *entity = get_expression_entity(tp_expression);
2929 if (entity != NULL) {
2930 alignment = get_cparser_entity_alignment(entity);
2934 if (alignment == 0) {
2935 type_t *type = expression->type;
2936 alignment = get_type_alignment(type);
2939 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2940 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2941 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2942 return new_d_Const(dbgi, tv);
2945 static void init_ir_types(void);
2947 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2949 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2951 bool constant_folding_old = constant_folding;
2952 constant_folding = true;
2953 int old_optimize = get_optimize();
2954 int old_constant_folding = get_opt_constant_folding();
2956 set_opt_constant_folding(1);
2960 ir_graph *old_current_ir_graph = current_ir_graph;
2961 current_ir_graph = get_const_code_irg();
2963 ir_node *const cnst = _expression_to_firm(expression);
2965 current_ir_graph = old_current_ir_graph;
2966 set_optimize(old_optimize);
2967 set_opt_constant_folding(old_constant_folding);
2969 if (!is_Const(cnst)) {
2970 panic("couldn't fold constant");
2973 constant_folding = constant_folding_old;
2975 ir_tarval *const tv = get_Const_tarval(cnst);
2976 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2977 return tarval_convert_to(tv, mode);
2980 /* this function is only used in parser.c, but it relies on libfirm functionality */
2981 bool constant_is_negative(const expression_t *expression)
2983 ir_tarval *tv = fold_constant_to_tarval(expression);
2984 return tarval_is_negative(tv);
2987 long fold_constant_to_int(const expression_t *expression)
2989 ir_tarval *tv = fold_constant_to_tarval(expression);
2990 if (!tarval_is_long(tv)) {
2991 panic("result of constant folding is not integer");
2994 return get_tarval_long(tv);
2997 bool fold_constant_to_bool(const expression_t *expression)
2999 ir_tarval *tv = fold_constant_to_tarval(expression);
3000 return !tarval_is_null(tv);
3003 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3005 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3007 /* first try to fold a constant condition */
3008 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3009 bool val = fold_constant_to_bool(expression->condition);
3011 expression_t *true_expression = expression->true_expression;
3012 if (true_expression == NULL)
3013 true_expression = expression->condition;
3014 return expression_to_firm(true_expression);
3016 return expression_to_firm(expression->false_expression);
3020 ir_node *const true_block = new_immBlock();
3021 ir_node *const false_block = new_immBlock();
3022 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3023 mature_immBlock(true_block);
3024 mature_immBlock(false_block);
3026 set_cur_block(true_block);
3028 if (expression->true_expression != NULL) {
3029 true_val = expression_to_firm(expression->true_expression);
3030 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3031 true_val = cond_expr;
3033 /* Condition ended with a short circuit (&&, ||, !) operation or a
3034 * comparison. Generate a "1" as value for the true branch. */
3035 true_val = new_Const(get_mode_one(mode_Is));
3037 ir_node *const true_jmp = new_d_Jmp(dbgi);
3039 set_cur_block(false_block);
3040 ir_node *const false_val = expression_to_firm(expression->false_expression);
3041 ir_node *const false_jmp = new_d_Jmp(dbgi);
3043 /* create the common block */
3044 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3045 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3046 set_cur_block(block);
3048 /* TODO improve static semantics, so either both or no values are NULL */
3049 if (true_val == NULL || false_val == NULL)
3052 ir_node *const in[2] = { true_val, false_val };
3053 type_t *const type = skip_typeref(expression->base.type);
3054 ir_mode *const mode = get_ir_mode_arithmetic(type);
3055 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3061 * Returns an IR-node representing the address of a field.
3063 static ir_node *select_addr(const select_expression_t *expression)
3065 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3067 construct_select_compound(expression);
3069 ir_node *compound_addr = expression_to_firm(expression->compound);
3071 entity_t *entry = expression->compound_entry;
3072 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3073 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3075 if (constant_folding) {
3076 ir_mode *mode = get_irn_mode(compound_addr);
3077 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3078 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3079 return new_d_Add(dbgi, compound_addr, ofs, mode);
3081 ir_entity *irentity = entry->compound_member.entity;
3082 assert(irentity != NULL);
3083 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3087 static ir_node *select_to_firm(const select_expression_t *expression)
3089 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3090 ir_node *addr = select_addr(expression);
3091 type_t *type = revert_automatic_type_conversion(
3092 (const expression_t*) expression);
3093 type = skip_typeref(type);
3095 entity_t *entry = expression->compound_entry;
3096 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3098 if (entry->compound_member.bitfield) {
3099 return bitfield_extract_to_firm(expression, addr);
3102 return deref_address(dbgi, type, addr);
3105 /* Values returned by __builtin_classify_type. */
3106 typedef enum gcc_type_class
3112 enumeral_type_class,
3115 reference_type_class,
3119 function_type_class,
3130 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3132 type_t *type = expr->type_expression->base.type;
3134 /* FIXME gcc returns different values depending on whether compiling C or C++
3135 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3138 type = skip_typeref(type);
3139 switch (type->kind) {
3141 const atomic_type_t *const atomic_type = &type->atomic;
3142 switch (atomic_type->akind) {
3143 /* should not be reached */
3144 case ATOMIC_TYPE_INVALID:
3148 /* gcc cannot do that */
3149 case ATOMIC_TYPE_VOID:
3150 tc = void_type_class;
3153 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3154 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3155 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3156 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3157 case ATOMIC_TYPE_SHORT:
3158 case ATOMIC_TYPE_USHORT:
3159 case ATOMIC_TYPE_INT:
3160 case ATOMIC_TYPE_UINT:
3161 case ATOMIC_TYPE_LONG:
3162 case ATOMIC_TYPE_ULONG:
3163 case ATOMIC_TYPE_LONGLONG:
3164 case ATOMIC_TYPE_ULONGLONG:
3165 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3166 tc = integer_type_class;
3169 case ATOMIC_TYPE_FLOAT:
3170 case ATOMIC_TYPE_DOUBLE:
3171 case ATOMIC_TYPE_LONG_DOUBLE:
3172 tc = real_type_class;
3175 panic("Unexpected atomic type in classify_type_to_firm().");
3178 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3179 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3180 case TYPE_ARRAY: /* gcc handles this as pointer */
3181 case TYPE_FUNCTION: /* gcc handles this as pointer */
3182 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3183 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3184 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3186 /* gcc handles this as integer */
3187 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3189 /* gcc classifies the referenced type */
3190 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3192 /* typedef/typeof should be skipped already */
3198 panic("unexpected TYPE classify_type_to_firm().");
3202 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3203 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3204 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3205 return new_d_Const(dbgi, tv);
3208 static ir_node *function_name_to_firm(
3209 const funcname_expression_t *const expr)
3211 switch(expr->kind) {
3212 case FUNCNAME_FUNCTION:
3213 case FUNCNAME_PRETTY_FUNCTION:
3214 case FUNCNAME_FUNCDNAME:
3215 if (current_function_name == NULL) {
3216 const source_position_t *const src_pos = &expr->base.source_position;
3217 const char *name = current_function_entity->base.symbol->string;
3218 const string_t string = { name, strlen(name) + 1 };
3219 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3221 return current_function_name;
3222 case FUNCNAME_FUNCSIG:
3223 if (current_funcsig == NULL) {
3224 const source_position_t *const src_pos = &expr->base.source_position;
3225 ir_entity *ent = get_irg_entity(current_ir_graph);
3226 const char *const name = get_entity_ld_name(ent);
3227 const string_t string = { name, strlen(name) + 1 };
3228 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3230 return current_funcsig;
3232 panic("Unsupported function name");
3235 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3237 statement_t *statement = expr->statement;
3239 assert(statement->kind == STATEMENT_COMPOUND);
3240 return compound_statement_to_firm(&statement->compound);
3243 static ir_node *va_start_expression_to_firm(
3244 const va_start_expression_t *const expr)
3246 ir_entity *param_ent = current_vararg_entity;
3247 if (param_ent == NULL) {
3248 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3249 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3250 ir_type *const param_type = get_unknown_type();
3251 param_ent = new_parameter_entity(frame_type, n, param_type);
3252 current_vararg_entity = param_ent;
3255 ir_node *const frame = get_irg_frame(current_ir_graph);
3256 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3257 ir_node *const no_mem = new_NoMem();
3258 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3260 set_value_for_expression(expr->ap, arg_sel);
3265 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3267 type_t *const type = expr->base.type;
3268 expression_t *const ap_expr = expr->ap;
3269 ir_node *const ap_addr = expression_to_addr(ap_expr);
3270 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3271 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3272 ir_node *const res = deref_address(dbgi, type, ap);
3274 ir_node *const cnst = get_type_size_node(expr->base.type);
3275 ir_mode *const mode = get_irn_mode(cnst);
3276 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3277 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3278 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3279 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3280 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3282 set_value_for_expression_addr(ap_expr, add, ap_addr);
3288 * Generate Firm for a va_copy expression.
3290 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3292 ir_node *const src = expression_to_firm(expr->src);
3293 set_value_for_expression(expr->dst, src);
3297 static ir_node *dereference_addr(const unary_expression_t *const expression)
3299 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3300 return expression_to_firm(expression->value);
3304 * Returns a IR-node representing an lvalue of the given expression.
3306 static ir_node *expression_to_addr(const expression_t *expression)
3308 switch(expression->kind) {
3309 case EXPR_ARRAY_ACCESS:
3310 return array_access_addr(&expression->array_access);
3312 return call_expression_to_firm(&expression->call);
3313 case EXPR_COMPOUND_LITERAL:
3314 return compound_literal_addr(&expression->compound_literal);
3315 case EXPR_REFERENCE:
3316 return reference_addr(&expression->reference);
3318 return select_addr(&expression->select);
3319 case EXPR_UNARY_DEREFERENCE:
3320 return dereference_addr(&expression->unary);
3324 panic("trying to get address of non-lvalue");
3327 static ir_node *builtin_constant_to_firm(
3328 const builtin_constant_expression_t *expression)
3330 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3331 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3332 return create_Const_from_bool(mode, v);
3335 static ir_node *builtin_types_compatible_to_firm(
3336 const builtin_types_compatible_expression_t *expression)
3338 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3339 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3340 bool const value = types_compatible(left, right);
3341 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3342 return create_Const_from_bool(mode, value);
3345 static ir_node *get_label_block(label_t *label)
3347 if (label->block != NULL)
3348 return label->block;
3350 /* beware: might be called from create initializer with current_ir_graph
3351 * set to const_code_irg. */
3352 ir_graph *rem = current_ir_graph;
3353 current_ir_graph = current_function;
3355 ir_node *block = new_immBlock();
3357 label->block = block;
3359 ARR_APP1(label_t *, all_labels, label);
3361 current_ir_graph = rem;
3366 * Pointer to a label. This is used for the
3367 * GNU address-of-label extension.
3369 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3371 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3372 ir_node *block = get_label_block(label->label);
3373 ir_entity *entity = create_Block_entity(block);
3375 symconst_symbol value;
3376 value.entity_p = entity;
3377 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3381 * creates firm nodes for an expression. The difference between this function
3382 * and expression_to_firm is, that this version might produce mode_b nodes
3383 * instead of mode_Is.
3385 static ir_node *_expression_to_firm(expression_t const *const expr)
3388 if (!constant_folding) {
3389 assert(!expr->base.transformed);
3390 ((expression_t*)expr)->base.transformed = true;
3394 switch (expr->kind) {
3395 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3396 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3397 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3398 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3399 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3400 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3401 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3402 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3403 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3404 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3405 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3406 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3407 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3408 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3409 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3410 case EXPR_SELECT: return select_to_firm( &expr->select);
3411 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3412 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3413 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3414 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3415 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3416 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3417 case EXPR_WIDE_STRING_LITERAL: return wide_string_literal_to_firm( &expr->string_literal);
3419 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3421 case EXPR_ERROR: break;
3423 panic("invalid expression found");
3427 * Check if a given expression is a GNU __builtin_expect() call.
3429 static bool is_builtin_expect(const expression_t *expression)
3431 if (expression->kind != EXPR_CALL)
3434 expression_t *function = expression->call.function;
3435 if (function->kind != EXPR_REFERENCE)
3437 reference_expression_t *ref = &function->reference;
3438 if (ref->entity->kind != ENTITY_FUNCTION ||
3439 ref->entity->function.btk != BUILTIN_EXPECT)
3445 static bool produces_mode_b(const expression_t *expression)
3447 switch (expression->kind) {
3448 case EXPR_BINARY_EQUAL:
3449 case EXPR_BINARY_NOTEQUAL:
3450 case EXPR_BINARY_LESS:
3451 case EXPR_BINARY_LESSEQUAL:
3452 case EXPR_BINARY_GREATER:
3453 case EXPR_BINARY_GREATEREQUAL:
3454 case EXPR_BINARY_ISGREATER:
3455 case EXPR_BINARY_ISGREATEREQUAL:
3456 case EXPR_BINARY_ISLESS:
3457 case EXPR_BINARY_ISLESSEQUAL:
3458 case EXPR_BINARY_ISLESSGREATER:
3459 case EXPR_BINARY_ISUNORDERED:
3460 case EXPR_UNARY_NOT:
3464 if (is_builtin_expect(expression)) {
3465 expression_t *argument = expression->call.arguments->expression;
3466 return produces_mode_b(argument);
3469 case EXPR_BINARY_COMMA:
3470 return produces_mode_b(expression->binary.right);
3477 static ir_node *expression_to_firm(const expression_t *expression)
3479 if (!produces_mode_b(expression)) {
3480 ir_node *res = _expression_to_firm(expression);
3481 assert(res == NULL || get_irn_mode(res) != mode_b);
3485 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3486 return new_Const(fold_constant_to_tarval(expression));
3489 /* we have to produce a 0/1 from the mode_b expression */
3490 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3491 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3492 return produce_condition_result(expression, mode, dbgi);
3496 * create a short-circuit expression evaluation that tries to construct
3497 * efficient control flow structures for &&, || and ! expressions
3499 static ir_node *create_condition_evaluation(const expression_t *expression,
3500 ir_node *true_block,
3501 ir_node *false_block)
3503 switch(expression->kind) {
3504 case EXPR_UNARY_NOT: {
3505 const unary_expression_t *unary_expression = &expression->unary;
3506 create_condition_evaluation(unary_expression->value, false_block,
3510 case EXPR_BINARY_LOGICAL_AND: {
3511 const binary_expression_t *binary_expression = &expression->binary;
3513 ir_node *extra_block = new_immBlock();
3514 create_condition_evaluation(binary_expression->left, extra_block,
3516 mature_immBlock(extra_block);
3517 set_cur_block(extra_block);
3518 create_condition_evaluation(binary_expression->right, true_block,
3522 case EXPR_BINARY_LOGICAL_OR: {
3523 const binary_expression_t *binary_expression = &expression->binary;
3525 ir_node *extra_block = new_immBlock();
3526 create_condition_evaluation(binary_expression->left, true_block,
3528 mature_immBlock(extra_block);
3529 set_cur_block(extra_block);
3530 create_condition_evaluation(binary_expression->right, true_block,
3538 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3539 ir_node *cond_expr = _expression_to_firm(expression);
3540 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3541 ir_node *cond = new_d_Cond(dbgi, condition);
3542 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3543 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3545 /* set branch prediction info based on __builtin_expect */
3546 if (is_builtin_expect(expression) && is_Cond(cond)) {
3547 call_argument_t *argument = expression->call.arguments->next;
3548 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3549 bool const cnst = fold_constant_to_bool(argument->expression);
3550 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3551 set_Cond_jmp_pred(cond, pred);
3555 add_immBlock_pred(true_block, true_proj);
3556 add_immBlock_pred(false_block, false_proj);
3558 set_unreachable_now();
3562 static void create_variable_entity(entity_t *variable,
3563 declaration_kind_t declaration_kind,
3564 ir_type *parent_type)
3566 assert(variable->kind == ENTITY_VARIABLE);
3567 type_t *type = skip_typeref(variable->declaration.type);
3569 ident *const id = new_id_from_str(variable->base.symbol->string);
3570 ir_type *const irtype = get_ir_type(type);
3571 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3572 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3573 unsigned alignment = variable->declaration.alignment;
3575 set_entity_alignment(irentity, alignment);
3577 handle_decl_modifiers(irentity, variable);
3579 variable->declaration.kind = (unsigned char) declaration_kind;
3580 variable->variable.v.entity = irentity;
3581 set_entity_ld_ident(irentity, create_ld_ident(variable));
3583 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3584 set_entity_volatility(irentity, volatility_is_volatile);
3589 typedef struct type_path_entry_t type_path_entry_t;
3590 struct type_path_entry_t {
3592 ir_initializer_t *initializer;
3594 entity_t *compound_entry;
3597 typedef struct type_path_t type_path_t;
3598 struct type_path_t {
3599 type_path_entry_t *path;
3604 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3606 size_t len = ARR_LEN(path->path);
3608 for (size_t i = 0; i < len; ++i) {
3609 const type_path_entry_t *entry = & path->path[i];
3611 type_t *type = skip_typeref(entry->type);
3612 if (is_type_compound(type)) {
3613 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3614 } else if (is_type_array(type)) {
3615 fprintf(stderr, "[%u]", (unsigned) entry->index);
3617 fprintf(stderr, "-INVALID-");
3620 fprintf(stderr, " (");
3621 print_type(path->top_type);
3622 fprintf(stderr, ")");
3625 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3627 size_t len = ARR_LEN(path->path);
3629 return & path->path[len-1];
3632 static type_path_entry_t *append_to_type_path(type_path_t *path)
3634 size_t len = ARR_LEN(path->path);
3635 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3637 type_path_entry_t *result = & path->path[len];
3638 memset(result, 0, sizeof(result[0]));
3642 static size_t get_compound_member_count(const compound_type_t *type)
3644 compound_t *compound = type->compound;
3645 size_t n_members = 0;
3646 entity_t *member = compound->members.entities;
3647 for ( ; member != NULL; member = member->base.next) {
3654 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3656 type_t *orig_top_type = path->top_type;
3657 type_t *top_type = skip_typeref(orig_top_type);
3659 assert(is_type_compound(top_type) || is_type_array(top_type));
3661 if (ARR_LEN(path->path) == 0) {
3664 type_path_entry_t *top = get_type_path_top(path);
3665 ir_initializer_t *initializer = top->initializer;
3666 return get_initializer_compound_value(initializer, top->index);
3670 static void descend_into_subtype(type_path_t *path)
3672 type_t *orig_top_type = path->top_type;
3673 type_t *top_type = skip_typeref(orig_top_type);
3675 assert(is_type_compound(top_type) || is_type_array(top_type));
3677 ir_initializer_t *initializer = get_initializer_entry(path);
3679 type_path_entry_t *top = append_to_type_path(path);
3680 top->type = top_type;
3684 if (is_type_compound(top_type)) {
3685 compound_t *const compound = top_type->compound.compound;
3686 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3688 top->compound_entry = entry;
3690 len = get_compound_member_count(&top_type->compound);
3691 if (entry != NULL) {
3692 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3693 path->top_type = entry->declaration.type;
3696 assert(is_type_array(top_type));
3697 assert(top_type->array.size > 0);
3700 path->top_type = top_type->array.element_type;
3701 len = top_type->array.size;
3703 if (initializer == NULL
3704 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3705 initializer = create_initializer_compound(len);
3706 /* we have to set the entry at the 2nd latest path entry... */
3707 size_t path_len = ARR_LEN(path->path);
3708 assert(path_len >= 1);
3710 type_path_entry_t *entry = & path->path[path_len-2];
3711 ir_initializer_t *tinitializer = entry->initializer;
3712 set_initializer_compound_value(tinitializer, entry->index,
3716 top->initializer = initializer;
3719 static void ascend_from_subtype(type_path_t *path)
3721 type_path_entry_t *top = get_type_path_top(path);
3723 path->top_type = top->type;
3725 size_t len = ARR_LEN(path->path);
3726 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3729 static void walk_designator(type_path_t *path, const designator_t *designator)
3731 /* designators start at current object type */
3732 ARR_RESIZE(type_path_entry_t, path->path, 1);
3734 for ( ; designator != NULL; designator = designator->next) {
3735 type_path_entry_t *top = get_type_path_top(path);
3736 type_t *orig_type = top->type;
3737 type_t *type = skip_typeref(orig_type);
3739 if (designator->symbol != NULL) {
3740 assert(is_type_compound(type));
3742 symbol_t *symbol = designator->symbol;
3744 compound_t *compound = type->compound.compound;
3745 entity_t *iter = compound->members.entities;
3746 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3747 if (iter->base.symbol == symbol) {
3748 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3752 assert(iter != NULL);
3754 /* revert previous initialisations of other union elements */
3755 if (type->kind == TYPE_COMPOUND_UNION) {
3756 ir_initializer_t *initializer = top->initializer;
3757 if (initializer != NULL
3758 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3759 /* are we writing to a new element? */
3760 ir_initializer_t *oldi
3761 = get_initializer_compound_value(initializer, index);
3762 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3763 /* clear initializer */
3765 = get_initializer_compound_n_entries(initializer);
3766 ir_initializer_t *nulli = get_initializer_null();
3767 for (size_t i = 0; i < len; ++i) {
3768 set_initializer_compound_value(initializer, i,
3775 top->type = orig_type;
3776 top->compound_entry = iter;
3778 orig_type = iter->declaration.type;
3780 expression_t *array_index = designator->array_index;
3781 assert(designator->array_index != NULL);
3782 assert(is_type_array(type));
3784 long index = fold_constant_to_int(array_index);
3787 if (type->array.size_constant) {
3788 long array_size = type->array.size;
3789 assert(index < array_size);
3793 top->type = orig_type;
3794 top->index = (size_t) index;
3795 orig_type = type->array.element_type;
3797 path->top_type = orig_type;
3799 if (designator->next != NULL) {
3800 descend_into_subtype(path);
3804 path->invalid = false;
3807 static void advance_current_object(type_path_t *path)
3809 if (path->invalid) {
3810 /* TODO: handle this... */
3811 panic("invalid initializer in ast2firm (excessive elements)");
3814 type_path_entry_t *top = get_type_path_top(path);
3816 type_t *type = skip_typeref(top->type);
3817 if (is_type_union(type)) {
3818 /* only the first element is initialized in unions */
3819 top->compound_entry = NULL;
3820 } else if (is_type_struct(type)) {
3821 entity_t *entry = top->compound_entry;
3824 entry = skip_unnamed_bitfields(entry->base.next);
3825 top->compound_entry = entry;
3826 if (entry != NULL) {
3827 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3828 path->top_type = entry->declaration.type;
3832 assert(is_type_array(type));
3835 if (!type->array.size_constant || top->index < type->array.size) {
3840 /* we're past the last member of the current sub-aggregate, try if we
3841 * can ascend in the type hierarchy and continue with another subobject */
3842 size_t len = ARR_LEN(path->path);
3845 ascend_from_subtype(path);
3846 advance_current_object(path);
3848 path->invalid = true;
3853 static ir_initializer_t *create_ir_initializer_value(
3854 const initializer_value_t *initializer)
3856 if (is_type_compound(initializer->value->base.type)) {
3857 panic("initializer creation for compounds not implemented yet");
3859 type_t *type = initializer->value->base.type;
3860 expression_t *expr = initializer->value;
3861 ir_node *value = expression_to_firm(expr);
3862 ir_mode *mode = get_ir_mode_storage(type);
3863 value = create_conv(NULL, value, mode);
3864 return create_initializer_const(value);
3867 /** test wether type can be initialized by a string constant */
3868 static bool is_string_type(type_t *type)
3871 if (is_type_pointer(type)) {
3872 inner = skip_typeref(type->pointer.points_to);
3873 } else if(is_type_array(type)) {
3874 inner = skip_typeref(type->array.element_type);
3879 return is_type_integer(inner);
3882 static ir_initializer_t *create_ir_initializer_list(
3883 const initializer_list_t *initializer, type_t *type)
3886 memset(&path, 0, sizeof(path));
3887 path.top_type = type;
3888 path.path = NEW_ARR_F(type_path_entry_t, 0);
3890 descend_into_subtype(&path);
3892 for (size_t i = 0; i < initializer->len; ++i) {
3893 const initializer_t *sub_initializer = initializer->initializers[i];
3895 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3896 walk_designator(&path, sub_initializer->designator.designator);
3900 if (sub_initializer->kind == INITIALIZER_VALUE) {
3901 /* we might have to descend into types until we're at a scalar
3904 type_t *orig_top_type = path.top_type;
3905 type_t *top_type = skip_typeref(orig_top_type);
3907 if (is_type_scalar(top_type))
3909 descend_into_subtype(&path);
3911 } else if (sub_initializer->kind == INITIALIZER_STRING
3912 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3913 /* we might have to descend into types until we're at a scalar
3916 type_t *orig_top_type = path.top_type;
3917 type_t *top_type = skip_typeref(orig_top_type);
3919 if (is_string_type(top_type))
3921 descend_into_subtype(&path);
3925 ir_initializer_t *sub_irinitializer
3926 = create_ir_initializer(sub_initializer, path.top_type);
3928 size_t path_len = ARR_LEN(path.path);
3929 assert(path_len >= 1);
3930 type_path_entry_t *entry = & path.path[path_len-1];
3931 ir_initializer_t *tinitializer = entry->initializer;
3932 set_initializer_compound_value(tinitializer, entry->index,
3935 advance_current_object(&path);
3938 assert(ARR_LEN(path.path) >= 1);
3939 ir_initializer_t *result = path.path[0].initializer;
3940 DEL_ARR_F(path.path);
3945 static ir_initializer_t *create_ir_initializer_string(
3946 const initializer_string_t *initializer, type_t *type)
3948 type = skip_typeref(type);
3950 size_t string_len = initializer->string.size;
3951 assert(type->kind == TYPE_ARRAY);
3952 assert(type->array.size_constant);
3953 size_t len = type->array.size;
3954 ir_initializer_t *irinitializer = create_initializer_compound(len);
3956 const char *string = initializer->string.begin;
3957 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3959 for (size_t i = 0; i < len; ++i) {
3964 ir_tarval *tv = new_tarval_from_long(c, mode);
3965 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3967 set_initializer_compound_value(irinitializer, i, char_initializer);
3970 return irinitializer;
3973 static ir_initializer_t *create_ir_initializer_wide_string(
3974 const initializer_wide_string_t *initializer, type_t *type)
3976 assert(type->kind == TYPE_ARRAY);
3977 assert(type->array.size_constant);
3978 size_t len = type->array.size;
3979 size_t string_len = wstrlen(&initializer->string);
3980 ir_initializer_t *irinitializer = create_initializer_compound(len);
3982 const char *p = initializer->string.begin;
3983 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3985 for (size_t i = 0; i < len; ++i) {
3987 if (i < string_len) {
3988 c = read_utf8_char(&p);
3990 ir_tarval *tv = new_tarval_from_long(c, mode);
3991 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3993 set_initializer_compound_value(irinitializer, i, char_initializer);
3996 return irinitializer;
3999 static ir_initializer_t *create_ir_initializer(
4000 const initializer_t *initializer, type_t *type)
4002 switch(initializer->kind) {
4003 case INITIALIZER_STRING:
4004 return create_ir_initializer_string(&initializer->string, type);
4006 case INITIALIZER_WIDE_STRING:
4007 return create_ir_initializer_wide_string(&initializer->wide_string,
4010 case INITIALIZER_LIST:
4011 return create_ir_initializer_list(&initializer->list, type);
4013 case INITIALIZER_VALUE:
4014 return create_ir_initializer_value(&initializer->value);
4016 case INITIALIZER_DESIGNATOR:
4017 panic("unexpected designator initializer found");
4019 panic("unknown initializer");
4022 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4023 * are elements [...] the remainder of the aggregate shall be initialized
4024 * implicitly the same as objects that have static storage duration. */
4025 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4028 /* for unions we must NOT do anything for null initializers */
4029 ir_type *owner = get_entity_owner(entity);
4030 if (is_Union_type(owner)) {
4034 ir_type *ent_type = get_entity_type(entity);
4035 /* create sub-initializers for a compound type */
4036 if (is_compound_type(ent_type)) {
4037 unsigned n_members = get_compound_n_members(ent_type);
4038 for (unsigned n = 0; n < n_members; ++n) {
4039 ir_entity *member = get_compound_member(ent_type, n);
4040 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4042 create_dynamic_null_initializer(member, dbgi, addr);
4046 if (is_Array_type(ent_type)) {
4047 assert(has_array_upper_bound(ent_type, 0));
4048 long n = get_array_upper_bound_int(ent_type, 0);
4049 for (long i = 0; i < n; ++i) {
4050 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4051 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4052 ir_node *cnst = new_d_Const(dbgi, index_tv);
4053 ir_node *in[1] = { cnst };
4054 ir_entity *arrent = get_array_element_entity(ent_type);
4055 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4057 create_dynamic_null_initializer(arrent, dbgi, addr);
4062 ir_mode *value_mode = get_type_mode(ent_type);
4063 ir_node *node = new_Const(get_mode_null(value_mode));
4065 /* is it a bitfield type? */
4066 if (is_Primitive_type(ent_type) &&
4067 get_primitive_base_type(ent_type) != NULL) {
4068 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4072 ir_node *mem = get_store();
4073 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4074 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4078 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4079 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4081 switch(get_initializer_kind(initializer)) {
4082 case IR_INITIALIZER_NULL:
4083 create_dynamic_null_initializer(entity, dbgi, base_addr);
4085 case IR_INITIALIZER_CONST: {
4086 ir_node *node = get_initializer_const_value(initializer);
4087 ir_type *ent_type = get_entity_type(entity);
4089 /* is it a bitfield type? */
4090 if (is_Primitive_type(ent_type) &&
4091 get_primitive_base_type(ent_type) != NULL) {
4092 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4096 assert(get_type_mode(type) == get_irn_mode(node));
4097 ir_node *mem = get_store();
4098 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4099 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4103 case IR_INITIALIZER_TARVAL: {
4104 ir_tarval *tv = get_initializer_tarval_value(initializer);
4105 ir_node *cnst = new_d_Const(dbgi, tv);
4106 ir_type *ent_type = get_entity_type(entity);
4108 /* is it a bitfield type? */
4109 if (is_Primitive_type(ent_type) &&
4110 get_primitive_base_type(ent_type) != NULL) {
4111 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4115 assert(get_type_mode(type) == get_tarval_mode(tv));
4116 ir_node *mem = get_store();
4117 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4118 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4122 case IR_INITIALIZER_COMPOUND: {
4123 assert(is_compound_type(type) || is_Array_type(type));
4125 if (is_Array_type(type)) {
4126 assert(has_array_upper_bound(type, 0));
4127 n_members = get_array_upper_bound_int(type, 0);
4129 n_members = get_compound_n_members(type);
4132 if (get_initializer_compound_n_entries(initializer)
4133 != (unsigned) n_members)
4134 panic("initializer doesn't match compound type");
4136 for (int i = 0; i < n_members; ++i) {
4139 ir_entity *sub_entity;
4140 if (is_Array_type(type)) {
4141 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4142 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4143 ir_node *cnst = new_d_Const(dbgi, index_tv);
4144 ir_node *in[1] = { cnst };
4145 irtype = get_array_element_type(type);
4146 sub_entity = get_array_element_entity(type);
4147 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4150 sub_entity = get_compound_member(type, i);
4151 irtype = get_entity_type(sub_entity);
4152 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4156 ir_initializer_t *sub_init
4157 = get_initializer_compound_value(initializer, i);
4159 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4166 panic("invalid IR_INITIALIZER found");
4169 static void create_dynamic_initializer(ir_initializer_t *initializer,
4170 dbg_info *dbgi, ir_entity *entity)
4172 ir_node *frame = get_irg_frame(current_ir_graph);
4173 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4174 ir_type *type = get_entity_type(entity);
4176 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4179 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4180 ir_entity *entity, type_t *type)
4182 ir_node *memory = get_store();
4183 ir_node *nomem = new_NoMem();
4184 ir_node *frame = get_irg_frame(current_ir_graph);
4185 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4187 if (initializer->kind == INITIALIZER_VALUE) {
4188 initializer_value_t *initializer_value = &initializer->value;
4190 ir_node *value = expression_to_firm(initializer_value->value);
4191 type = skip_typeref(type);
4192 assign_value(dbgi, addr, type, value);
4196 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4197 ir_initializer_t *irinitializer
4198 = create_ir_initializer(initializer, type);
4200 create_dynamic_initializer(irinitializer, dbgi, entity);
4204 /* create a "template" entity which is copied to the entity on the stack */
4205 ir_entity *const init_entity
4206 = create_initializer_entity(dbgi, initializer, type);
4207 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4208 ir_type *const irtype = get_ir_type(type);
4209 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4211 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4212 set_store(copyb_mem);
4215 static void create_initializer_local_variable_entity(entity_t *entity)
4217 assert(entity->kind == ENTITY_VARIABLE);
4218 initializer_t *initializer = entity->variable.initializer;
4219 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4220 ir_entity *irentity = entity->variable.v.entity;
4221 type_t *type = entity->declaration.type;
4223 create_local_initializer(initializer, dbgi, irentity, type);
4226 static void create_variable_initializer(entity_t *entity)
4228 assert(entity->kind == ENTITY_VARIABLE);
4229 initializer_t *initializer = entity->variable.initializer;
4230 if (initializer == NULL)
4233 declaration_kind_t declaration_kind
4234 = (declaration_kind_t) entity->declaration.kind;
4235 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4236 create_initializer_local_variable_entity(entity);
4240 type_t *type = entity->declaration.type;
4241 type_qualifiers_t tq = get_type_qualifier(type, true);
4243 if (initializer->kind == INITIALIZER_VALUE) {
4244 expression_t * value = initializer->value.value;
4245 type_t *const init_type = skip_typeref(value->base.type);
4247 if (!is_type_scalar(init_type)) {
4249 while (value->kind == EXPR_UNARY_CAST)
4250 value = value->unary.value;
4252 if (value->kind != EXPR_COMPOUND_LITERAL)
4253 panic("expected non-scalar initializer to be a compound literal");
4254 initializer = value->compound_literal.initializer;
4255 goto have_initializer;
4258 ir_node * node = expression_to_firm(value);
4259 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4260 ir_mode *const mode = get_ir_mode_storage(init_type);
4261 node = create_conv(dbgi, node, mode);
4262 node = do_strict_conv(dbgi, node);
4264 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4265 set_value(entity->variable.v.value_number, node);
4267 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4269 ir_entity *irentity = entity->variable.v.entity;
4271 if (tq & TYPE_QUALIFIER_CONST
4272 && get_entity_owner(irentity) != get_tls_type()) {
4273 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4275 set_atomic_ent_value(irentity, node);
4279 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4280 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4282 ir_entity *irentity = entity->variable.v.entity;
4283 ir_initializer_t *irinitializer
4284 = create_ir_initializer(initializer, type);
4286 if (tq & TYPE_QUALIFIER_CONST) {
4287 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4289 set_entity_initializer(irentity, irinitializer);
4293 static void create_variable_length_array(entity_t *entity)
4295 assert(entity->kind == ENTITY_VARIABLE);
4296 assert(entity->variable.initializer == NULL);
4298 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4299 entity->variable.v.vla_base = NULL;
4301 /* TODO: record VLA somewhere so we create the free node when we leave
4305 static void allocate_variable_length_array(entity_t *entity)
4307 assert(entity->kind == ENTITY_VARIABLE);
4308 assert(entity->variable.initializer == NULL);
4309 assert(currently_reachable());
4311 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4312 type_t *type = entity->declaration.type;
4313 ir_type *el_type = get_ir_type(type->array.element_type);
4315 /* make sure size_node is calculated */
4316 get_type_size_node(type);
4317 ir_node *elems = type->array.size_node;
4318 ir_node *mem = get_store();
4319 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4321 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4322 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4325 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4326 entity->variable.v.vla_base = addr;
4330 * Creates a Firm local variable from a declaration.
4332 static void create_local_variable(entity_t *entity)
4334 assert(entity->kind == ENTITY_VARIABLE);
4335 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4337 bool needs_entity = entity->variable.address_taken;
4338 type_t *type = skip_typeref(entity->declaration.type);
4340 /* is it a variable length array? */
4341 if (is_type_array(type) && !type->array.size_constant) {
4342 create_variable_length_array(entity);
4344 } else if (is_type_array(type) || is_type_compound(type)) {
4345 needs_entity = true;
4346 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4347 needs_entity = true;
4351 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4352 create_variable_entity(entity,
4353 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4356 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4357 entity->variable.v.value_number = next_value_number_function;
4358 set_irg_loc_description(current_ir_graph, next_value_number_function,
4360 ++next_value_number_function;
4364 static void create_local_static_variable(entity_t *entity)
4366 assert(entity->kind == ENTITY_VARIABLE);
4367 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4369 type_t *type = skip_typeref(entity->declaration.type);
4370 ir_type *const var_type = entity->variable.thread_local ?
4371 get_tls_type() : get_glob_type();
4372 ir_type *const irtype = get_ir_type(type);
4373 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4375 size_t l = strlen(entity->base.symbol->string);
4376 char buf[l + sizeof(".%u")];
4377 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4378 ident *const id = id_unique(buf);
4379 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4381 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4382 set_entity_volatility(irentity, volatility_is_volatile);
4385 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4386 entity->variable.v.entity = irentity;
4388 set_entity_ld_ident(irentity, id);
4389 set_entity_visibility(irentity, ir_visibility_local);
4391 if (entity->variable.initializer == NULL) {
4392 ir_initializer_t *null_init = get_initializer_null();
4393 set_entity_initializer(irentity, null_init);
4396 ir_graph *const old_current_ir_graph = current_ir_graph;
4397 current_ir_graph = get_const_code_irg();
4399 create_variable_initializer(entity);
4401 assert(current_ir_graph == get_const_code_irg());
4402 current_ir_graph = old_current_ir_graph;
4407 static ir_node *return_statement_to_firm(return_statement_t *statement)
4409 if (!currently_reachable())
4412 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4413 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4414 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4417 if (!is_type_void(type)) {
4418 ir_mode *const mode = get_ir_mode_storage(type);
4420 res = create_conv(dbgi, res, mode);
4421 res = do_strict_conv(dbgi, res);
4423 res = new_Unknown(mode);
4430 ir_node *const in[1] = { res };
4431 ir_node *const store = get_store();
4432 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4434 ir_node *end_block = get_irg_end_block(current_ir_graph);
4435 add_immBlock_pred(end_block, ret);
4437 set_unreachable_now();
4441 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4443 if (!currently_reachable())
4446 return expression_to_firm(statement->expression);
4449 static void create_local_declarations(entity_t*);
4451 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4453 create_local_declarations(compound->scope.entities);
4455 ir_node *result = NULL;
4456 statement_t *statement = compound->statements;
4457 for ( ; statement != NULL; statement = statement->base.next) {
4458 result = statement_to_firm(statement);
4464 static void create_global_variable(entity_t *entity)
4466 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4467 ir_visibility visibility = ir_visibility_external;
4468 storage_class_tag_t storage
4469 = (storage_class_tag_t)entity->declaration.storage_class;
4470 decl_modifiers_t modifiers = entity->declaration.modifiers;
4471 assert(entity->kind == ENTITY_VARIABLE);
4474 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4475 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4476 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4477 case STORAGE_CLASS_TYPEDEF:
4478 case STORAGE_CLASS_AUTO:
4479 case STORAGE_CLASS_REGISTER:
4480 panic("invalid storage class for global var");
4483 /* "common" symbols */
4484 if (storage == STORAGE_CLASS_NONE
4485 && entity->variable.initializer == NULL
4486 && !entity->variable.thread_local
4487 && (modifiers & DM_WEAK) == 0) {
4488 linkage |= IR_LINKAGE_MERGE;
4491 ir_type *var_type = get_glob_type();
4492 if (entity->variable.thread_local) {
4493 var_type = get_tls_type();
4495 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4496 ir_entity *irentity = entity->variable.v.entity;
4497 add_entity_linkage(irentity, linkage);
4498 set_entity_visibility(irentity, visibility);
4499 if (entity->variable.initializer == NULL
4500 && storage != STORAGE_CLASS_EXTERN) {
4501 ir_initializer_t *null_init = get_initializer_null();
4502 set_entity_initializer(irentity, null_init);
4506 static void create_local_declaration(entity_t *entity)
4508 assert(is_declaration(entity));
4510 /* construct type */
4511 (void) get_ir_type(entity->declaration.type);
4512 if (entity->base.symbol == NULL) {
4516 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4517 case STORAGE_CLASS_STATIC:
4518 if (entity->kind == ENTITY_FUNCTION) {
4519 (void)get_function_entity(entity, NULL);
4521 create_local_static_variable(entity);
4524 case STORAGE_CLASS_EXTERN:
4525 if (entity->kind == ENTITY_FUNCTION) {
4526 assert(entity->function.statement == NULL);
4527 (void)get_function_entity(entity, NULL);
4529 create_global_variable(entity);
4530 create_variable_initializer(entity);
4533 case STORAGE_CLASS_NONE:
4534 case STORAGE_CLASS_AUTO:
4535 case STORAGE_CLASS_REGISTER:
4536 if (entity->kind == ENTITY_FUNCTION) {
4537 if (entity->function.statement != NULL) {
4538 ir_type *owner = get_irg_frame_type(current_ir_graph);
4539 (void)get_function_entity(entity, owner);
4540 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4541 enqueue_inner_function(entity);
4543 (void)get_function_entity(entity, NULL);
4546 create_local_variable(entity);
4549 case STORAGE_CLASS_TYPEDEF:
4552 panic("invalid storage class found");
4555 static void create_local_declarations(entity_t *e)
4557 for (; e; e = e->base.next) {
4558 if (is_declaration(e))
4559 create_local_declaration(e);
4563 static void initialize_local_declaration(entity_t *entity)
4565 if (entity->base.symbol == NULL)
4568 // no need to emit code in dead blocks
4569 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4570 && !currently_reachable())
4573 switch ((declaration_kind_t) entity->declaration.kind) {
4574 case DECLARATION_KIND_LOCAL_VARIABLE:
4575 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4576 create_variable_initializer(entity);
4579 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4580 allocate_variable_length_array(entity);
4583 case DECLARATION_KIND_COMPOUND_MEMBER:
4584 case DECLARATION_KIND_GLOBAL_VARIABLE:
4585 case DECLARATION_KIND_FUNCTION:
4586 case DECLARATION_KIND_INNER_FUNCTION:
4589 case DECLARATION_KIND_PARAMETER:
4590 case DECLARATION_KIND_PARAMETER_ENTITY:
4591 panic("can't initialize parameters");
4593 case DECLARATION_KIND_UNKNOWN:
4594 panic("can't initialize unknown declaration");
4596 panic("invalid declaration kind");
4599 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4601 entity_t *entity = statement->declarations_begin;
4605 entity_t *const last = statement->declarations_end;
4606 for ( ;; entity = entity->base.next) {
4607 if (is_declaration(entity)) {
4608 initialize_local_declaration(entity);
4609 } else if (entity->kind == ENTITY_TYPEDEF) {
4610 /* ยง6.7.7:3 Any array size expressions associated with variable length
4611 * array declarators are evaluated each time the declaration of the
4612 * typedef name is reached in the order of execution. */
4613 type_t *const type = skip_typeref(entity->typedefe.type);
4614 if (is_type_array(type) && type->array.is_vla)
4615 get_vla_size(&type->array);
4624 static ir_node *if_statement_to_firm(if_statement_t *statement)
4626 create_local_declarations(statement->scope.entities);
4628 /* Create the condition. */
4629 ir_node *true_block = NULL;
4630 ir_node *false_block = NULL;
4631 if (currently_reachable()) {
4632 true_block = new_immBlock();
4633 false_block = new_immBlock();
4634 create_condition_evaluation(statement->condition, true_block, false_block);
4635 mature_immBlock(true_block);
4636 mature_immBlock(false_block);
4639 /* Create the true statement. */
4640 set_cur_block(true_block);
4641 statement_to_firm(statement->true_statement);
4642 ir_node *fallthrough_block = get_cur_block();
4644 /* Create the false statement. */
4645 set_cur_block(false_block);
4646 if (statement->false_statement != NULL) {
4647 statement_to_firm(statement->false_statement);
4650 /* Handle the block after the if-statement. Minor simplification and
4651 * optimisation: Reuse the false/true block as fallthrough block, if the
4652 * true/false statement does not pass control to the fallthrough block, e.g.
4653 * in the typical if (x) return; pattern. */
4654 if (fallthrough_block) {
4655 if (currently_reachable()) {
4656 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4657 ir_node *const f_jump = new_Jmp();
4658 ir_node *const in[] = { t_jump, f_jump };
4659 fallthrough_block = new_Block(2, in);
4661 set_cur_block(fallthrough_block);
4668 * Add an unconditional jump to the target block. If the source block is not
4669 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4670 * loops. This is necessary if the jump potentially enters a loop.
4672 static void jump_to(ir_node *const target_block)
4674 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4675 add_immBlock_pred(target_block, pred);
4679 * Add an unconditional jump to the target block, if the current block is
4680 * reachable and do nothing otherwise. This is only valid if the jump does not
4681 * enter a loop (a back edge is ok).
4683 static void jump_if_reachable(ir_node *const target_block)
4685 if (currently_reachable())
4686 add_immBlock_pred(target_block, new_Jmp());
4689 static ir_node *while_statement_to_firm(while_statement_t *statement)
4691 create_local_declarations(statement->scope.entities);
4693 /* Create the header block */
4694 ir_node *const header_block = new_immBlock();
4695 jump_to(header_block);
4697 /* Create the condition. */
4698 ir_node * body_block;
4699 ir_node * false_block;
4700 expression_t *const cond = statement->condition;
4701 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4702 fold_constant_to_bool(cond)) {
4703 /* Shortcut for while (true). */
4704 body_block = header_block;
4707 keep_alive(header_block);
4708 keep_all_memory(header_block);
4710 body_block = new_immBlock();
4711 false_block = new_immBlock();
4713 set_cur_block(header_block);
4714 create_condition_evaluation(cond, body_block, false_block);
4715 mature_immBlock(body_block);
4718 ir_node *const old_continue_label = continue_label;
4719 ir_node *const old_break_label = break_label;
4720 continue_label = header_block;
4721 break_label = false_block;
4723 /* Create the loop body. */
4724 set_cur_block(body_block);
4725 statement_to_firm(statement->body);
4726 jump_if_reachable(header_block);
4728 mature_immBlock(header_block);
4729 assert(false_block == NULL || false_block == break_label);
4730 false_block = break_label;
4731 if (false_block != NULL) {
4732 mature_immBlock(false_block);
4734 set_cur_block(false_block);
4736 assert(continue_label == header_block);
4737 continue_label = old_continue_label;
4738 break_label = old_break_label;
4742 static ir_node *get_break_label(void)
4744 if (break_label == NULL) {
4745 break_label = new_immBlock();
4750 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4752 create_local_declarations(statement->scope.entities);
4754 /* create the header block */
4755 ir_node *header_block = new_immBlock();
4758 ir_node *body_block = new_immBlock();
4759 jump_to(body_block);
4761 ir_node *old_continue_label = continue_label;
4762 ir_node *old_break_label = break_label;
4763 continue_label = header_block;
4766 set_cur_block(body_block);
4767 statement_to_firm(statement->body);
4768 ir_node *const false_block = get_break_label();
4770 assert(continue_label == header_block);
4771 continue_label = old_continue_label;
4772 break_label = old_break_label;
4774 jump_if_reachable(header_block);
4776 /* create the condition */
4777 mature_immBlock(header_block);
4778 set_cur_block(header_block);
4780 create_condition_evaluation(statement->condition, body_block, false_block);
4781 mature_immBlock(body_block);
4782 mature_immBlock(false_block);
4784 set_cur_block(false_block);
4788 static ir_node *for_statement_to_firm(for_statement_t *statement)
4790 create_local_declarations(statement->scope.entities);
4792 if (currently_reachable()) {
4793 entity_t *entity = statement->scope.entities;
4794 for ( ; entity != NULL; entity = entity->base.next) {
4795 if (!is_declaration(entity))
4798 initialize_local_declaration(entity);
4801 if (statement->initialisation != NULL) {
4802 expression_to_firm(statement->initialisation);
4806 /* Create the header block */
4807 ir_node *const header_block = new_immBlock();
4808 jump_to(header_block);
4810 /* Create the condition. */
4811 ir_node *body_block;
4812 ir_node *false_block;
4813 if (statement->condition != NULL) {
4814 body_block = new_immBlock();
4815 false_block = new_immBlock();
4817 set_cur_block(header_block);
4818 create_condition_evaluation(statement->condition, body_block, false_block);
4819 mature_immBlock(body_block);
4822 body_block = header_block;
4825 keep_alive(header_block);
4826 keep_all_memory(header_block);
4829 /* Create the step block, if necessary. */
4830 ir_node * step_block = header_block;
4831 expression_t *const step = statement->step;
4833 step_block = new_immBlock();
4836 ir_node *const old_continue_label = continue_label;
4837 ir_node *const old_break_label = break_label;
4838 continue_label = step_block;
4839 break_label = false_block;
4841 /* Create the loop body. */
4842 set_cur_block(body_block);
4843 statement_to_firm(statement->body);
4844 jump_if_reachable(step_block);
4846 /* Create the step code. */
4848 mature_immBlock(step_block);
4849 set_cur_block(step_block);
4850 expression_to_firm(step);
4851 jump_if_reachable(header_block);
4854 mature_immBlock(header_block);
4855 assert(false_block == NULL || false_block == break_label);
4856 false_block = break_label;
4857 if (false_block != NULL) {
4858 mature_immBlock(false_block);
4860 set_cur_block(false_block);
4862 assert(continue_label == step_block);
4863 continue_label = old_continue_label;
4864 break_label = old_break_label;
4868 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4870 if (!currently_reachable())
4873 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4874 ir_node *jump = new_d_Jmp(dbgi);
4875 add_immBlock_pred(target_block, jump);
4877 set_unreachable_now();
4881 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4883 /* determine number of cases */
4885 for (case_label_statement_t *l = statement->first_case; l != NULL;
4888 if (l->expression == NULL)
4890 if (l->is_empty_range)
4895 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4897 for (case_label_statement_t *l = statement->first_case; l != NULL;
4899 if (l->expression == NULL) {
4900 l->pn = pn_Switch_default;
4903 if (l->is_empty_range)
4905 ir_tarval *min = fold_constant_to_tarval(l->expression);
4906 ir_tarval *max = min;
4907 long pn = (long) i+1;
4908 if (l->end_range != NULL)
4909 max = fold_constant_to_tarval(l->end_range);
4910 ir_switch_table_set(res, i++, min, max, pn);
4916 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4918 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4919 ir_node *switch_node = NULL;
4921 if (currently_reachable()) {
4922 ir_node *expression = expression_to_firm(statement->expression);
4923 ir_switch_table *table = create_switch_table(statement);
4924 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4926 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4929 set_unreachable_now();
4931 ir_node *const old_switch = current_switch;
4932 ir_node *const old_break_label = break_label;
4933 const bool old_saw_default_label = saw_default_label;
4934 saw_default_label = false;
4935 current_switch = switch_node;
4938 statement_to_firm(statement->body);
4940 if (currently_reachable()) {
4941 add_immBlock_pred(get_break_label(), new_Jmp());
4944 if (!saw_default_label && switch_node) {
4945 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4946 add_immBlock_pred(get_break_label(), proj);
4949 if (break_label != NULL) {
4950 mature_immBlock(break_label);
4952 set_cur_block(break_label);
4954 assert(current_switch == switch_node);
4955 current_switch = old_switch;
4956 break_label = old_break_label;
4957 saw_default_label = old_saw_default_label;
4961 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4963 if (statement->is_empty_range)
4966 if (current_switch != NULL) {
4967 ir_node *block = new_immBlock();
4968 /* Fallthrough from previous case */
4969 jump_if_reachable(block);
4971 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4972 add_immBlock_pred(block, proj);
4973 if (statement->expression == NULL)
4974 saw_default_label = true;
4976 mature_immBlock(block);
4977 set_cur_block(block);
4980 return statement_to_firm(statement->statement);
4983 static ir_node *label_to_firm(const label_statement_t *statement)
4985 ir_node *block = get_label_block(statement->label);
4988 set_cur_block(block);
4990 keep_all_memory(block);
4992 return statement_to_firm(statement->statement);
4995 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4997 if (!currently_reachable())
5000 ir_node *const irn = expression_to_firm(statement->expression);
5001 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5002 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
5004 set_irn_link(ijmp, ijmp_list);
5007 set_unreachable_now();
5011 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5013 bool needs_memory = false;
5015 if (statement->is_volatile) {
5016 needs_memory = true;
5019 size_t n_clobbers = 0;
5020 asm_clobber_t *clobber = statement->clobbers;
5021 for ( ; clobber != NULL; clobber = clobber->next) {
5022 const char *clobber_str = clobber->clobber.begin;
5024 if (!be_is_valid_clobber(clobber_str)) {
5025 errorf(&statement->base.source_position,
5026 "invalid clobber '%s' specified", clobber->clobber);
5030 if (streq(clobber_str, "memory")) {
5031 needs_memory = true;
5035 ident *id = new_id_from_str(clobber_str);
5036 obstack_ptr_grow(&asm_obst, id);
5039 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5040 ident **clobbers = NULL;
5041 if (n_clobbers > 0) {
5042 clobbers = obstack_finish(&asm_obst);
5045 size_t n_inputs = 0;
5046 asm_argument_t *argument = statement->inputs;
5047 for ( ; argument != NULL; argument = argument->next)
5049 size_t n_outputs = 0;
5050 argument = statement->outputs;
5051 for ( ; argument != NULL; argument = argument->next)
5054 unsigned next_pos = 0;
5056 ir_node *ins[n_inputs + n_outputs + 1];
5059 ir_asm_constraint tmp_in_constraints[n_outputs];
5061 const expression_t *out_exprs[n_outputs];
5062 ir_node *out_addrs[n_outputs];
5063 size_t out_size = 0;
5065 argument = statement->outputs;
5066 for ( ; argument != NULL; argument = argument->next) {
5067 const char *constraints = argument->constraints.begin;
5068 asm_constraint_flags_t asm_flags
5069 = be_parse_asm_constraints(constraints);
5072 source_position_t const *const pos = &statement->base.source_position;
5073 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5074 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5076 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5077 errorf(pos, "some constraints in '%s' are invalid", constraints);
5080 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5081 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5086 unsigned pos = next_pos++;
5087 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5088 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5089 expression_t *expr = argument->expression;
5090 ir_node *addr = expression_to_addr(expr);
5091 /* in+output, construct an artifical same_as constraint on the
5093 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5095 ir_node *value = get_value_from_lvalue(expr, addr);
5097 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5099 ir_asm_constraint constraint;
5100 constraint.pos = pos;
5101 constraint.constraint = new_id_from_str(buf);
5102 constraint.mode = get_ir_mode_storage(expr->base.type);
5103 tmp_in_constraints[in_size] = constraint;
5104 ins[in_size] = value;
5109 out_exprs[out_size] = expr;
5110 out_addrs[out_size] = addr;
5112 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5113 /* pure memory ops need no input (but we have to make sure we
5114 * attach to the memory) */
5115 assert(! (asm_flags &
5116 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5117 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5118 needs_memory = true;
5120 /* we need to attach the address to the inputs */
5121 expression_t *expr = argument->expression;
5123 ir_asm_constraint constraint;
5124 constraint.pos = pos;
5125 constraint.constraint = new_id_from_str(constraints);
5126 constraint.mode = mode_M;
5127 tmp_in_constraints[in_size] = constraint;
5129 ins[in_size] = expression_to_addr(expr);
5133 errorf(&statement->base.source_position,
5134 "only modifiers but no place set in constraints '%s'",
5139 ir_asm_constraint constraint;
5140 constraint.pos = pos;
5141 constraint.constraint = new_id_from_str(constraints);
5142 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5144 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5146 assert(obstack_object_size(&asm_obst)
5147 == out_size * sizeof(ir_asm_constraint));
5148 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5151 obstack_grow(&asm_obst, tmp_in_constraints,
5152 in_size * sizeof(tmp_in_constraints[0]));
5153 /* find and count input and output arguments */
5154 argument = statement->inputs;
5155 for ( ; argument != NULL; argument = argument->next) {
5156 const char *constraints = argument->constraints.begin;
5157 asm_constraint_flags_t asm_flags
5158 = be_parse_asm_constraints(constraints);
5160 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5161 errorf(&statement->base.source_position,
5162 "some constraints in '%s' are not supported", constraints);
5165 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5166 errorf(&statement->base.source_position,
5167 "some constraints in '%s' are invalid", constraints);
5170 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5171 errorf(&statement->base.source_position,
5172 "write flag specified for input constraints '%s'",
5178 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5179 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5180 /* we can treat this as "normal" input */
5181 input = expression_to_firm(argument->expression);
5182 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5183 /* pure memory ops need no input (but we have to make sure we
5184 * attach to the memory) */
5185 assert(! (asm_flags &
5186 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5187 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5188 needs_memory = true;
5189 input = expression_to_addr(argument->expression);
5191 errorf(&statement->base.source_position,
5192 "only modifiers but no place set in constraints '%s'",
5197 ir_asm_constraint constraint;
5198 constraint.pos = next_pos++;
5199 constraint.constraint = new_id_from_str(constraints);
5200 constraint.mode = get_irn_mode(input);
5202 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5203 ins[in_size++] = input;
5207 ir_asm_constraint constraint;
5208 constraint.pos = next_pos++;
5209 constraint.constraint = new_id_from_str("");
5210 constraint.mode = mode_M;
5212 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5213 ins[in_size++] = get_store();
5216 assert(obstack_object_size(&asm_obst)
5217 == in_size * sizeof(ir_asm_constraint));
5218 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5220 /* create asm node */
5221 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5223 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5225 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5226 out_size, output_constraints,
5227 n_clobbers, clobbers, asm_text);
5229 if (statement->is_volatile) {
5230 set_irn_pinned(node, op_pin_state_pinned);
5232 set_irn_pinned(node, op_pin_state_floats);
5235 /* create output projs & connect them */
5237 ir_node *projm = new_Proj(node, mode_M, out_size);
5242 for (i = 0; i < out_size; ++i) {
5243 const expression_t *out_expr = out_exprs[i];
5245 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5246 ir_node *proj = new_Proj(node, mode, pn);
5247 ir_node *addr = out_addrs[i];
5249 set_value_for_expression_addr(out_expr, proj, addr);
5255 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5257 statement_to_firm(statement->try_statement);
5258 source_position_t const *const pos = &statement->base.source_position;
5259 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5263 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5265 errorf(&statement->base.source_position, "__leave not supported yet");
5270 * Transform a statement.
5272 static ir_node *statement_to_firm(statement_t *const stmt)
5275 assert(!stmt->base.transformed);
5276 stmt->base.transformed = true;
5279 switch (stmt->kind) {
5280 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5281 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5282 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5283 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5284 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5285 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5286 case STATEMENT_EMPTY: return NULL; /* nothing */
5287 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5288 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5289 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5290 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5291 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5292 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5293 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5294 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5295 case STATEMENT_WHILE: return while_statement_to_firm( &stmt->whiles);
5297 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5298 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5299 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5301 case STATEMENT_ERROR: panic("error statement found");
5303 panic("statement not implemented");
5306 static int count_local_variables(const entity_t *entity,
5307 const entity_t *const last)
5310 entity_t const *const end = last != NULL ? last->base.next : NULL;
5311 for (; entity != end; entity = entity->base.next) {
5315 if (entity->kind == ENTITY_VARIABLE) {
5316 type = skip_typeref(entity->declaration.type);
5317 address_taken = entity->variable.address_taken;
5318 } else if (entity->kind == ENTITY_PARAMETER) {
5319 type = skip_typeref(entity->declaration.type);
5320 address_taken = entity->parameter.address_taken;
5325 if (!address_taken && is_type_scalar(type))
5331 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5333 int *const count = env;
5335 switch (stmt->kind) {
5336 case STATEMENT_DECLARATION: {
5337 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5338 *count += count_local_variables(decl_stmt->declarations_begin,
5339 decl_stmt->declarations_end);
5344 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5353 * Return the number of local (alias free) variables used by a function.
5355 static int get_function_n_local_vars(entity_t *entity)
5357 const function_t *function = &entity->function;
5360 /* count parameters */
5361 count += count_local_variables(function->parameters.entities, NULL);
5363 /* count local variables declared in body */
5364 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5369 * Build Firm code for the parameters of a function.
5371 static void initialize_function_parameters(entity_t *entity)
5373 assert(entity->kind == ENTITY_FUNCTION);
5374 ir_graph *irg = current_ir_graph;
5375 ir_node *args = get_irg_args(irg);
5377 ir_type *function_irtype;
5379 if (entity->function.need_closure) {
5380 /* add an extra parameter for the static link */
5381 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5384 /* Matze: IMO this is wrong, nested functions should have an own
5385 * type and not rely on strange parameters... */
5386 function_irtype = create_method_type(&entity->declaration.type->function, true);
5388 function_irtype = get_ir_type(entity->declaration.type);
5393 entity_t *parameter = entity->function.parameters.entities;
5394 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5395 if (parameter->kind != ENTITY_PARAMETER)
5398 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5399 type_t *type = skip_typeref(parameter->declaration.type);
5401 bool needs_entity = parameter->parameter.address_taken;
5402 assert(!is_type_array(type));
5403 if (is_type_compound(type)) {
5404 needs_entity = true;
5407 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5409 ir_type *frame_type = get_irg_frame_type(irg);
5411 = new_parameter_entity(frame_type, n, param_irtype);
5412 parameter->declaration.kind
5413 = DECLARATION_KIND_PARAMETER_ENTITY;
5414 parameter->parameter.v.entity = param;
5418 ir_mode *param_mode = get_type_mode(param_irtype);
5420 ir_node *value = new_r_Proj(args, param_mode, pn);
5422 ir_mode *mode = get_ir_mode_storage(type);
5423 value = create_conv(NULL, value, mode);
5424 value = do_strict_conv(NULL, value);
5426 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5427 parameter->parameter.v.value_number = next_value_number_function;
5428 set_irg_loc_description(current_ir_graph, next_value_number_function,
5430 ++next_value_number_function;
5432 set_value(parameter->parameter.v.value_number, value);
5437 * Handle additional decl modifiers for IR-graphs
5439 * @param irg the IR-graph
5440 * @param dec_modifiers additional modifiers
5442 static void handle_decl_modifier_irg(ir_graph *irg,
5443 decl_modifiers_t decl_modifiers)
5445 if (decl_modifiers & DM_NAKED) {
5446 /* TRUE if the declaration includes the Microsoft
5447 __declspec(naked) specifier. */
5448 add_irg_additional_properties(irg, mtp_property_naked);
5450 if (decl_modifiers & DM_FORCEINLINE) {
5451 /* TRUE if the declaration includes the
5452 Microsoft __forceinline specifier. */
5453 set_irg_inline_property(irg, irg_inline_forced);
5455 if (decl_modifiers & DM_NOINLINE) {
5456 /* TRUE if the declaration includes the Microsoft
5457 __declspec(noinline) specifier. */
5458 set_irg_inline_property(irg, irg_inline_forbidden);
5462 static void add_function_pointer(ir_type *segment, ir_entity *method,
5463 const char *unique_template)
5465 ir_type *method_type = get_entity_type(method);
5466 ir_type *ptr_type = new_type_pointer(method_type);
5468 /* these entities don't really have a name but firm only allows
5470 * Note that we mustn't give these entities a name since for example
5471 * Mach-O doesn't allow them. */
5472 ident *ide = id_unique(unique_template);
5473 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5474 ir_graph *irg = get_const_code_irg();
5475 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5478 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5479 set_entity_compiler_generated(ptr, 1);
5480 set_entity_visibility(ptr, ir_visibility_private);
5481 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5482 set_atomic_ent_value(ptr, val);
5486 * Generate possible IJmp branches to a given label block.
5488 static void gen_ijmp_branches(ir_node *block)
5491 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5492 add_immBlock_pred(block, ijmp);
5497 * Create code for a function and all inner functions.
5499 * @param entity the function entity
5501 static void create_function(entity_t *entity)
5503 assert(entity->kind == ENTITY_FUNCTION);
5504 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5506 if (entity->function.statement == NULL)
5509 inner_functions = NULL;
5510 current_trampolines = NULL;
5512 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5513 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5514 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5516 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5517 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5518 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5521 current_function_entity = entity;
5522 current_function_name = NULL;
5523 current_funcsig = NULL;
5525 assert(all_labels == NULL);
5526 all_labels = NEW_ARR_F(label_t *, 0);
5529 int n_local_vars = get_function_n_local_vars(entity);
5530 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5531 current_ir_graph = irg;
5533 ir_graph *old_current_function = current_function;
5534 current_function = irg;
5536 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5537 current_vararg_entity = NULL;
5539 set_irg_fp_model(irg, firm_fp_model);
5540 tarval_enable_fp_ops(1);
5541 set_irn_dbg_info(get_irg_start_block(irg),
5542 get_entity_dbg_info(function_entity));
5544 /* set inline flags */
5545 if (entity->function.is_inline)
5546 set_irg_inline_property(irg, irg_inline_recomended);
5547 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5549 next_value_number_function = 0;
5550 initialize_function_parameters(entity);
5551 current_static_link = entity->function.static_link;
5553 statement_to_firm(entity->function.statement);
5555 ir_node *end_block = get_irg_end_block(irg);
5557 /* do we have a return statement yet? */
5558 if (currently_reachable()) {
5559 type_t *type = skip_typeref(entity->declaration.type);
5560 assert(is_type_function(type));
5561 type_t *const return_type = skip_typeref(type->function.return_type);
5564 if (is_type_void(return_type)) {
5565 ret = new_Return(get_store(), 0, NULL);
5567 ir_mode *const mode = get_ir_mode_storage(return_type);
5570 /* ยง5.1.2.2.3 main implicitly returns 0 */
5571 if (is_main(entity)) {
5572 in[0] = new_Const(get_mode_null(mode));
5574 in[0] = new_Unknown(mode);
5576 ret = new_Return(get_store(), 1, in);
5578 add_immBlock_pred(end_block, ret);
5581 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5582 label_t *label = all_labels[i];
5583 if (label->address_taken) {
5584 gen_ijmp_branches(label->block);
5586 mature_immBlock(label->block);
5589 DEL_ARR_F(all_labels);
5592 irg_finalize_cons(irg);
5594 /* finalize the frame type */
5595 ir_type *frame_type = get_irg_frame_type(irg);
5596 int n = get_compound_n_members(frame_type);
5599 for (int i = 0; i < n; ++i) {
5600 ir_entity *member = get_compound_member(frame_type, i);
5601 ir_type *entity_type = get_entity_type(member);
5603 int align = get_type_alignment_bytes(entity_type);
5604 if (align > align_all)
5608 misalign = offset % align;
5610 offset += align - misalign;
5614 set_entity_offset(member, offset);
5615 offset += get_type_size_bytes(entity_type);
5617 set_type_size_bytes(frame_type, offset);
5618 set_type_alignment_bytes(frame_type, align_all);
5620 irg_verify(irg, VERIFY_ENFORCE_SSA);
5621 current_vararg_entity = old_current_vararg_entity;
5622 current_function = old_current_function;
5624 if (current_trampolines != NULL) {
5625 DEL_ARR_F(current_trampolines);
5626 current_trampolines = NULL;
5629 /* create inner functions if any */
5630 entity_t **inner = inner_functions;
5631 if (inner != NULL) {
5632 ir_type *rem_outer_frame = current_outer_frame;
5633 current_outer_frame = get_irg_frame_type(current_ir_graph);
5634 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5635 create_function(inner[i]);
5639 current_outer_frame = rem_outer_frame;
5643 static void scope_to_firm(scope_t *scope)
5645 /* first pass: create declarations */
5646 entity_t *entity = scope->entities;
5647 for ( ; entity != NULL; entity = entity->base.next) {
5648 if (entity->base.symbol == NULL)
5651 if (entity->kind == ENTITY_FUNCTION) {
5652 if (entity->function.btk != BUILTIN_NONE) {
5653 /* builtins have no representation */
5656 (void)get_function_entity(entity, NULL);
5657 } else if (entity->kind == ENTITY_VARIABLE) {
5658 create_global_variable(entity);
5659 } else if (entity->kind == ENTITY_NAMESPACE) {
5660 scope_to_firm(&entity->namespacee.members);
5664 /* second pass: create code/initializers */
5665 entity = scope->entities;
5666 for ( ; entity != NULL; entity = entity->base.next) {
5667 if (entity->base.symbol == NULL)
5670 if (entity->kind == ENTITY_FUNCTION) {
5671 if (entity->function.btk != BUILTIN_NONE) {
5672 /* builtins have no representation */
5675 create_function(entity);
5676 } else if (entity->kind == ENTITY_VARIABLE) {
5677 assert(entity->declaration.kind
5678 == DECLARATION_KIND_GLOBAL_VARIABLE);
5679 current_ir_graph = get_const_code_irg();
5680 create_variable_initializer(entity);
5685 void init_ast2firm(void)
5687 obstack_init(&asm_obst);
5688 init_atomic_modes();
5690 ir_set_debug_retrieve(dbg_retrieve);
5691 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5693 /* create idents for all known runtime functions */
5694 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5695 rts_idents[i] = new_id_from_str(rts_data[i].name);
5698 entitymap_init(&entitymap);
5701 static void init_ir_types(void)
5703 static int ir_types_initialized = 0;
5704 if (ir_types_initialized)
5706 ir_types_initialized = 1;
5708 ir_type_char = get_ir_type(type_char);
5709 ir_type_const_char = get_ir_type(type_const_char);
5710 ir_type_wchar_t = get_ir_type(type_wchar_t);
5712 be_params = be_get_backend_param();
5713 mode_float_arithmetic = be_params->mode_float_arithmetic;
5715 stack_param_align = be_params->stack_param_align;
5718 void exit_ast2firm(void)
5720 entitymap_destroy(&entitymap);
5721 obstack_free(&asm_obst, NULL);
5724 static void global_asm_to_firm(statement_t *s)
5726 for (; s != NULL; s = s->base.next) {
5727 assert(s->kind == STATEMENT_ASM);
5729 char const *const text = s->asms.asm_text.begin;
5730 size_t size = s->asms.asm_text.size;
5732 /* skip the last \0 */
5733 if (text[size - 1] == '\0')
5736 ident *const id = new_id_from_chars(text, size);
5741 static const char *get_cwd(void)
5743 static char buf[1024];
5745 getcwd(buf, sizeof(buf));
5749 void translation_unit_to_firm(translation_unit_t *unit)
5751 if (c_mode & _CXX) {
5752 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5753 } else if (c_mode & _C99) {
5754 be_dwarf_set_source_language(DW_LANG_C99);
5755 } else if (c_mode & _C89) {
5756 be_dwarf_set_source_language(DW_LANG_C89);
5758 be_dwarf_set_source_language(DW_LANG_C);
5760 be_dwarf_set_compilation_directory(get_cwd());
5762 /* initialize firm arithmetic */
5763 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5764 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5766 /* just to be sure */
5767 continue_label = NULL;
5769 current_switch = NULL;
5770 current_translation_unit = unit;
5774 scope_to_firm(&unit->scope);
5775 global_asm_to_firm(unit->global_asm);
5777 current_ir_graph = NULL;
5778 current_translation_unit = NULL;