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_addr(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));
1524 if (entity->kind == ENTITY_FUNCTION
1525 && entity->function.btk != BUILTIN_NONE) {
1526 ir_entity *irentity = get_function_entity(entity, NULL);
1527 /* for gcc compatibility we have to produce (dummy) addresses for some
1528 * builtins which don't have entities */
1529 if (irentity == NULL) {
1530 source_position_t const *const pos = &ref->base.source_position;
1531 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1533 /* simply create a NULL pointer */
1534 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1535 ir_node *res = new_Const(get_mode_null(mode));
1541 switch((declaration_kind_t) entity->declaration.kind) {
1542 case DECLARATION_KIND_UNKNOWN:
1544 case DECLARATION_KIND_PARAMETER:
1545 case DECLARATION_KIND_LOCAL_VARIABLE:
1546 /* you can store to a local variable (so we don't panic but return NULL
1547 * as an indicator for no real address) */
1549 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1550 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1554 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1555 case DECLARATION_KIND_PARAMETER_ENTITY: {
1556 ir_entity *irentity = entity->variable.v.entity;
1557 ir_node *frame = get_local_frame(irentity);
1558 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1562 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1563 return entity->variable.v.vla_base;
1565 case DECLARATION_KIND_FUNCTION: {
1566 return create_symconst(dbgi, entity->function.irentity);
1569 case DECLARATION_KIND_INNER_FUNCTION: {
1570 type_t *const type = skip_typeref(entity->declaration.type);
1571 ir_mode *const mode = get_ir_mode_storage(type);
1572 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1573 /* inner function not using the closure */
1574 return create_symconst(dbgi, entity->function.irentity);
1576 /* need trampoline here */
1577 return create_trampoline(dbgi, mode, entity->function.irentity);
1581 case DECLARATION_KIND_COMPOUND_MEMBER:
1582 panic("not implemented reference type");
1585 panic("reference to declaration with unknown type found");
1588 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1590 dbg_info *const dbgi = get_dbg_info(&ref->base.source_position);
1591 entity_t *const entity = ref->entity;
1592 assert(is_declaration(entity));
1594 switch ((declaration_kind_t)entity->declaration.kind) {
1595 case DECLARATION_KIND_LOCAL_VARIABLE:
1596 case DECLARATION_KIND_PARAMETER: {
1597 type_t *const type = skip_typeref(entity->declaration.type);
1598 ir_mode *const mode = get_ir_mode_storage(type);
1599 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1600 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1604 ir_node *const addr = reference_addr(ref);
1605 return deref_address(dbgi, entity->declaration.type, addr);
1611 * Transform calls to builtin functions.
1613 static ir_node *process_builtin_call(const call_expression_t *call)
1615 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1617 assert(call->function->kind == EXPR_REFERENCE);
1618 reference_expression_t *builtin = &call->function->reference;
1620 type_t *expr_type = skip_typeref(builtin->base.type);
1621 assert(is_type_pointer(expr_type));
1623 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1625 switch (builtin->entity->function.btk) {
1628 case BUILTIN_ALLOCA: {
1629 expression_t *argument = call->arguments->expression;
1630 ir_node *size = expression_to_firm(argument);
1632 ir_node *store = get_store();
1633 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1635 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1637 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1642 type_t *type = function_type->function.return_type;
1643 ir_mode *mode = get_ir_mode_arithmetic(type);
1644 ir_tarval *tv = get_mode_infinite(mode);
1645 ir_node *res = new_d_Const(dbgi, tv);
1649 /* Ignore string for now... */
1650 assert(is_type_function(function_type));
1651 type_t *type = function_type->function.return_type;
1652 ir_mode *mode = get_ir_mode_arithmetic(type);
1653 ir_tarval *tv = get_mode_NAN(mode);
1654 ir_node *res = new_d_Const(dbgi, tv);
1657 case BUILTIN_EXPECT: {
1658 expression_t *argument = call->arguments->expression;
1659 return _expression_to_firm(argument);
1661 case BUILTIN_VA_END:
1662 /* evaluate the argument of va_end for its side effects */
1663 _expression_to_firm(call->arguments->expression);
1665 case BUILTIN_OBJECT_SIZE: {
1666 /* determine value of "type" */
1667 expression_t *type_expression = call->arguments->next->expression;
1668 long type_val = fold_constant_to_int(type_expression);
1669 type_t *type = function_type->function.return_type;
1670 ir_mode *mode = get_ir_mode_arithmetic(type);
1671 /* just produce a "I don't know" result */
1672 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1673 get_mode_minus_one(mode);
1675 return new_d_Const(dbgi, result);
1677 case BUILTIN_ROTL: {
1678 ir_node *val = expression_to_firm(call->arguments->expression);
1679 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1680 ir_mode *mode = get_irn_mode(val);
1681 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1682 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1684 case BUILTIN_ROTR: {
1685 ir_node *val = expression_to_firm(call->arguments->expression);
1686 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1687 ir_mode *mode = get_irn_mode(val);
1688 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1689 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1690 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1691 return new_d_Rotl(dbgi, val, sub, mode);
1696 case BUILTIN_LIBC_CHECK:
1697 panic("builtin did not produce an entity");
1699 panic("invalid builtin found");
1703 * Transform a call expression.
1704 * Handles some special cases, like alloca() calls, which must be resolved
1705 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1706 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1709 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1711 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1712 assert(currently_reachable());
1714 expression_t *function = call->function;
1715 ir_node *callee = NULL;
1716 bool firm_builtin = false;
1717 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1718 if (function->kind == EXPR_REFERENCE) {
1719 const reference_expression_t *ref = &function->reference;
1720 entity_t *entity = ref->entity;
1722 if (entity->kind == ENTITY_FUNCTION) {
1723 builtin_kind_t builtin = entity->function.btk;
1724 if (builtin == BUILTIN_FIRM) {
1725 firm_builtin = true;
1726 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1727 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1728 && builtin != BUILTIN_LIBC_CHECK) {
1729 return process_builtin_call(call);
1734 callee = expression_to_firm(function);
1736 type_t *type = skip_typeref(function->base.type);
1737 assert(is_type_pointer(type));
1738 pointer_type_t *pointer_type = &type->pointer;
1739 type_t *points_to = skip_typeref(pointer_type->points_to);
1740 assert(is_type_function(points_to));
1741 function_type_t *function_type = &points_to->function;
1743 int n_parameters = 0;
1744 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1745 ir_type *new_method_type = NULL;
1746 if (function_type->variadic || function_type->unspecified_parameters) {
1747 const call_argument_t *argument = call->arguments;
1748 for ( ; argument != NULL; argument = argument->next) {
1752 /* we need to construct a new method type matching the call
1754 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1755 int n_res = get_method_n_ress(ir_method_type);
1756 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1757 set_method_calling_convention(new_method_type,
1758 get_method_calling_convention(ir_method_type));
1759 set_method_additional_properties(new_method_type,
1760 get_method_additional_properties(ir_method_type));
1761 set_method_variadicity(new_method_type,
1762 get_method_variadicity(ir_method_type));
1764 for (int i = 0; i < n_res; ++i) {
1765 set_method_res_type(new_method_type, i,
1766 get_method_res_type(ir_method_type, i));
1768 argument = call->arguments;
1769 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1770 expression_t *expression = argument->expression;
1771 ir_type *irtype = get_ir_type(expression->base.type);
1772 set_method_param_type(new_method_type, i, irtype);
1774 ir_method_type = new_method_type;
1776 n_parameters = get_method_n_params(ir_method_type);
1779 ir_node *in[n_parameters];
1781 const call_argument_t *argument = call->arguments;
1782 for (int n = 0; n < n_parameters; ++n) {
1783 expression_t *expression = argument->expression;
1784 ir_node *arg_node = expression_to_firm(expression);
1786 type_t *arg_type = skip_typeref(expression->base.type);
1787 if (!is_type_compound(arg_type)) {
1788 ir_mode *const mode = get_ir_mode_storage(arg_type);
1789 arg_node = create_conv(dbgi, arg_node, mode);
1790 arg_node = do_strict_conv(dbgi, arg_node);
1795 argument = argument->next;
1799 if (function_type->modifiers & DM_CONST) {
1800 store = get_irg_no_mem(current_ir_graph);
1802 store = get_store();
1806 type_t *return_type = skip_typeref(function_type->return_type);
1807 ir_node *result = NULL;
1809 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1811 if (! (function_type->modifiers & DM_CONST)) {
1812 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1816 if (!is_type_void(return_type)) {
1817 assert(is_type_scalar(return_type));
1818 ir_mode *mode = get_ir_mode_storage(return_type);
1819 result = new_Proj(node, mode, pn_Builtin_max+1);
1820 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1821 result = create_conv(NULL, result, mode_arith);
1824 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1825 if (! (function_type->modifiers & DM_CONST)) {
1826 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1830 if (!is_type_void(return_type)) {
1831 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1832 ir_mode *const mode = get_ir_mode_storage(return_type);
1833 result = new_Proj(resproj, mode, 0);
1834 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1835 result = create_conv(NULL, result, mode_arith);
1839 if (function_type->modifiers & DM_NORETURN) {
1840 /* A dead end: Keep the Call and the Block. Also place all further
1841 * nodes into a new and unreachable block. */
1843 keep_alive(get_cur_block());
1844 ir_node *block = new_Block(0, NULL);
1845 set_cur_block(block);
1851 static ir_node *statement_to_firm(statement_t *statement);
1852 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1854 static ir_node *expression_to_addr(const expression_t *expression);
1855 static ir_node *create_condition_evaluation(const expression_t *expression,
1856 ir_node *true_block,
1857 ir_node *false_block);
1859 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1862 if (!is_type_compound(type)) {
1863 ir_mode *mode = get_ir_mode_storage(type);
1864 value = create_conv(dbgi, value, mode);
1865 value = do_strict_conv(dbgi, value);
1868 ir_node *memory = get_store();
1870 if (is_type_scalar(type)) {
1871 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1872 ? cons_volatile : cons_none;
1873 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1874 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1875 set_store(store_mem);
1877 ir_type *irtype = get_ir_type(type);
1878 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1879 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1880 set_store(copyb_mem);
1884 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1886 ir_tarval *all_one = get_mode_all_one(mode);
1887 int mode_size = get_mode_size_bits(mode);
1888 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1890 assert(offset >= 0);
1892 assert(offset + size <= mode_size);
1893 if (size == mode_size) {
1897 long shiftr = get_mode_size_bits(mode) - size;
1898 long shiftl = offset;
1899 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1900 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1901 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1902 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1907 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1908 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1911 ir_type *entity_type = get_entity_type(entity);
1912 ir_type *base_type = get_primitive_base_type(entity_type);
1913 ir_mode *mode = get_type_mode(base_type);
1914 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1916 value = create_conv(dbgi, value, mode);
1918 /* kill upper bits of value and shift to right position */
1919 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1920 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1921 unsigned base_bits = get_mode_size_bits(mode);
1922 unsigned shiftwidth = base_bits - bitsize;
1924 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1925 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1927 unsigned shrwidth = base_bits - bitsize - bitoffset;
1928 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1929 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1931 /* load current value */
1932 ir_node *mem = get_store();
1933 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1934 set_volatile ? cons_volatile : cons_none);
1935 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1936 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1937 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1938 ir_tarval *inv_mask = tarval_not(shift_mask);
1939 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1940 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1942 /* construct new value and store */
1943 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1944 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1945 set_volatile ? cons_volatile : cons_none);
1946 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1947 set_store(store_mem);
1953 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1954 if (mode_is_signed(mode)) {
1955 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1957 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1962 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1965 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1966 entity_t *entity = expression->compound_entry;
1967 type_t *base_type = entity->declaration.type;
1968 ir_mode *mode = get_ir_mode_storage(base_type);
1969 ir_node *mem = get_store();
1970 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1971 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1972 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1973 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1975 ir_mode *amode = mode;
1976 /* optimisation, since shifting in modes < machine_size is usually
1978 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1981 unsigned amode_size = get_mode_size_bits(amode);
1982 load_res = create_conv(dbgi, load_res, amode);
1984 set_store(load_mem);
1986 /* kill upper bits */
1987 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1988 unsigned bitoffset = entity->compound_member.bit_offset;
1989 unsigned bitsize = entity->compound_member.bit_size;
1990 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1991 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1992 ir_node *countl = new_d_Const(dbgi, tvl);
1993 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1995 unsigned shift_bitsr = bitoffset + shift_bitsl;
1996 assert(shift_bitsr <= amode_size);
1997 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1998 ir_node *countr = new_d_Const(dbgi, tvr);
2000 if (mode_is_signed(mode)) {
2001 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2003 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2006 type_t *type = expression->base.type;
2007 ir_mode *resmode = get_ir_mode_arithmetic(type);
2008 return create_conv(dbgi, shiftr, resmode);
2011 /* make sure the selected compound type is constructed */
2012 static void construct_select_compound(const select_expression_t *expression)
2014 type_t *type = skip_typeref(expression->compound->base.type);
2015 if (is_type_pointer(type)) {
2016 type = type->pointer.points_to;
2018 (void) get_ir_type(type);
2021 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2022 ir_node *value, ir_node *addr)
2024 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2025 type_t *type = skip_typeref(expression->base.type);
2027 if (!is_type_compound(type)) {
2028 ir_mode *mode = get_ir_mode_storage(type);
2029 value = create_conv(dbgi, value, mode);
2030 value = do_strict_conv(dbgi, value);
2033 if (expression->kind == EXPR_REFERENCE) {
2034 const reference_expression_t *ref = &expression->reference;
2036 entity_t *entity = ref->entity;
2037 assert(is_declaration(entity));
2038 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2039 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2040 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2041 set_value(entity->variable.v.value_number, value);
2047 addr = expression_to_addr(expression);
2048 assert(addr != NULL);
2050 if (expression->kind == EXPR_SELECT) {
2051 const select_expression_t *select = &expression->select;
2053 construct_select_compound(select);
2055 entity_t *entity = select->compound_entry;
2056 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2057 if (entity->compound_member.bitfield) {
2058 ir_entity *irentity = entity->compound_member.entity;
2060 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2061 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2062 set_volatile, true);
2067 assign_value(dbgi, addr, type, value);
2071 static void set_value_for_expression(const expression_t *expression,
2074 set_value_for_expression_addr(expression, value, NULL);
2077 static ir_node *get_value_from_lvalue(const expression_t *expression,
2080 if (expression->kind == EXPR_REFERENCE) {
2081 const reference_expression_t *ref = &expression->reference;
2083 entity_t *entity = ref->entity;
2084 assert(entity->kind == ENTITY_VARIABLE
2085 || entity->kind == ENTITY_PARAMETER);
2086 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2088 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2089 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2090 value_number = entity->variable.v.value_number;
2091 assert(addr == NULL);
2092 type_t *type = skip_typeref(expression->base.type);
2093 ir_mode *mode = get_ir_mode_storage(type);
2094 ir_node *res = get_value(value_number, mode);
2095 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2099 assert(addr != NULL);
2100 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2103 if (expression->kind == EXPR_SELECT &&
2104 expression->select.compound_entry->compound_member.bitfield) {
2105 construct_select_compound(&expression->select);
2106 value = bitfield_extract_to_firm(&expression->select, addr);
2108 value = deref_address(dbgi, expression->base.type, addr);
2115 static ir_node *create_incdec(const unary_expression_t *expression)
2117 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2118 const expression_t *value_expr = expression->value;
2119 ir_node *addr = expression_to_addr(value_expr);
2120 ir_node *value = get_value_from_lvalue(value_expr, addr);
2122 type_t *type = skip_typeref(expression->base.type);
2123 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2126 if (is_type_pointer(type)) {
2127 pointer_type_t *pointer_type = &type->pointer;
2128 offset = get_type_size_node(pointer_type->points_to);
2130 assert(is_type_arithmetic(type));
2131 offset = new_Const(get_mode_one(mode));
2135 ir_node *store_value;
2136 switch(expression->base.kind) {
2137 case EXPR_UNARY_POSTFIX_INCREMENT:
2139 store_value = new_d_Add(dbgi, value, offset, mode);
2141 case EXPR_UNARY_POSTFIX_DECREMENT:
2143 store_value = new_d_Sub(dbgi, value, offset, mode);
2145 case EXPR_UNARY_PREFIX_INCREMENT:
2146 result = new_d_Add(dbgi, value, offset, mode);
2147 store_value = result;
2149 case EXPR_UNARY_PREFIX_DECREMENT:
2150 result = new_d_Sub(dbgi, value, offset, mode);
2151 store_value = result;
2154 panic("no incdec expr in create_incdec");
2157 set_value_for_expression_addr(value_expr, store_value, addr);
2162 static bool is_local_variable(expression_t *expression)
2164 if (expression->kind != EXPR_REFERENCE)
2166 reference_expression_t *ref_expr = &expression->reference;
2167 entity_t *entity = ref_expr->entity;
2168 if (entity->kind != ENTITY_VARIABLE)
2170 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2171 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2174 static ir_relation get_relation(const expression_kind_t kind)
2177 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2178 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2179 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2180 case EXPR_BINARY_ISLESS:
2181 case EXPR_BINARY_LESS: return ir_relation_less;
2182 case EXPR_BINARY_ISLESSEQUAL:
2183 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2184 case EXPR_BINARY_ISGREATER:
2185 case EXPR_BINARY_GREATER: return ir_relation_greater;
2186 case EXPR_BINARY_ISGREATEREQUAL:
2187 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2188 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2193 panic("trying to get pn_Cmp from non-comparison binexpr type");
2197 * Handle the assume optimizer hint: check if a Confirm
2198 * node can be created.
2200 * @param dbi debug info
2201 * @param expr the IL assume expression
2203 * we support here only some simple cases:
2208 static ir_node *handle_assume_compare(dbg_info *dbi,
2209 const binary_expression_t *expression)
2211 expression_t *op1 = expression->left;
2212 expression_t *op2 = expression->right;
2213 entity_t *var2, *var = NULL;
2214 ir_node *res = NULL;
2215 ir_relation relation = get_relation(expression->base.kind);
2217 if (is_local_variable(op1) && is_local_variable(op2)) {
2218 var = op1->reference.entity;
2219 var2 = op2->reference.entity;
2221 type_t *const type = skip_typeref(var->declaration.type);
2222 ir_mode *const mode = get_ir_mode_storage(type);
2224 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2225 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2227 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2228 set_value(var2->variable.v.value_number, res);
2230 res = new_d_Confirm(dbi, irn1, irn2, relation);
2231 set_value(var->variable.v.value_number, res);
2236 expression_t *con = NULL;
2237 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2238 var = op1->reference.entity;
2240 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2241 relation = get_inversed_relation(relation);
2242 var = op2->reference.entity;
2247 type_t *const type = skip_typeref(var->declaration.type);
2248 ir_mode *const mode = get_ir_mode_storage(type);
2250 res = get_value(var->variable.v.value_number, mode);
2251 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2252 set_value(var->variable.v.value_number, res);
2258 * Handle the assume optimizer hint.
2260 * @param dbi debug info
2261 * @param expr the IL assume expression
2263 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2265 switch(expression->kind) {
2266 case EXPR_BINARY_EQUAL:
2267 case EXPR_BINARY_NOTEQUAL:
2268 case EXPR_BINARY_LESS:
2269 case EXPR_BINARY_LESSEQUAL:
2270 case EXPR_BINARY_GREATER:
2271 case EXPR_BINARY_GREATEREQUAL:
2272 return handle_assume_compare(dbi, &expression->binary);
2278 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2279 type_t *from_type, type_t *type)
2281 type = skip_typeref(type);
2282 if (is_type_void(type)) {
2283 /* make sure firm type is constructed */
2284 (void) get_ir_type(type);
2287 if (!is_type_scalar(type)) {
2288 /* make sure firm type is constructed */
2289 (void) get_ir_type(type);
2293 from_type = skip_typeref(from_type);
2294 ir_mode *mode = get_ir_mode_storage(type);
2295 /* check for conversion from / to __based types */
2296 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2297 const variable_t *from_var = from_type->pointer.base_variable;
2298 const variable_t *to_var = type->pointer.base_variable;
2299 if (from_var != to_var) {
2300 if (from_var != NULL) {
2301 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2302 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2303 value_node = new_d_Add(dbgi, value_node, base, mode);
2305 if (to_var != NULL) {
2306 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2307 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2308 value_node = new_d_Sub(dbgi, value_node, base, mode);
2313 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2314 /* bool adjustments (we save a mode_Bu, but have to temporarily
2315 * convert to mode_b so we only get a 0/1 value */
2316 value_node = create_conv(dbgi, value_node, mode_b);
2319 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2320 ir_node *node = create_conv(dbgi, value_node, mode);
2321 node = do_strict_conv(dbgi, node);
2322 node = create_conv(dbgi, node, mode_arith);
2327 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2329 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2330 type_t *type = skip_typeref(expression->base.type);
2332 const expression_t *value = expression->value;
2334 switch(expression->base.kind) {
2335 case EXPR_UNARY_TAKE_ADDRESS:
2336 return expression_to_addr(value);
2338 case EXPR_UNARY_NEGATE: {
2339 ir_node *value_node = expression_to_firm(value);
2340 ir_mode *mode = get_ir_mode_arithmetic(type);
2341 return new_d_Minus(dbgi, value_node, mode);
2343 case EXPR_UNARY_PLUS:
2344 return expression_to_firm(value);
2345 case EXPR_UNARY_BITWISE_NEGATE: {
2346 ir_node *value_node = expression_to_firm(value);
2347 ir_mode *mode = get_ir_mode_arithmetic(type);
2348 return new_d_Not(dbgi, value_node, mode);
2350 case EXPR_UNARY_NOT: {
2351 ir_node *value_node = _expression_to_firm(value);
2352 value_node = create_conv(dbgi, value_node, mode_b);
2353 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2356 case EXPR_UNARY_DEREFERENCE: {
2357 ir_node *value_node = expression_to_firm(value);
2358 type_t *value_type = skip_typeref(value->base.type);
2359 assert(is_type_pointer(value_type));
2361 /* check for __based */
2362 const variable_t *const base_var = value_type->pointer.base_variable;
2363 if (base_var != NULL) {
2364 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2365 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2366 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2368 type_t *points_to = value_type->pointer.points_to;
2369 return deref_address(dbgi, points_to, value_node);
2371 case EXPR_UNARY_POSTFIX_INCREMENT:
2372 case EXPR_UNARY_POSTFIX_DECREMENT:
2373 case EXPR_UNARY_PREFIX_INCREMENT:
2374 case EXPR_UNARY_PREFIX_DECREMENT:
2375 return create_incdec(expression);
2376 case EXPR_UNARY_CAST: {
2377 ir_node *value_node = expression_to_firm(value);
2378 type_t *from_type = value->base.type;
2379 return create_cast(dbgi, value_node, from_type, type);
2381 case EXPR_UNARY_ASSUME:
2382 return handle_assume(dbgi, value);
2387 panic("invalid UNEXPR type found");
2391 * produces a 0/1 depending of the value of a mode_b node
2393 static ir_node *produce_condition_result(const expression_t *expression,
2394 ir_mode *mode, dbg_info *dbgi)
2396 ir_node *const one_block = new_immBlock();
2397 ir_node *const zero_block = new_immBlock();
2398 create_condition_evaluation(expression, one_block, zero_block);
2399 mature_immBlock(one_block);
2400 mature_immBlock(zero_block);
2402 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2403 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2404 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2405 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2406 set_cur_block(block);
2408 ir_node *const one = new_Const(get_mode_one(mode));
2409 ir_node *const zero = new_Const(get_mode_null(mode));
2410 ir_node *const in[2] = { one, zero };
2411 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2416 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2417 ir_node *value, type_t *type)
2419 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2420 assert(is_type_pointer(type));
2421 pointer_type_t *const pointer_type = &type->pointer;
2422 type_t *const points_to = skip_typeref(pointer_type->points_to);
2423 ir_node * elem_size = get_type_size_node(points_to);
2424 elem_size = create_conv(dbgi, elem_size, mode);
2425 value = create_conv(dbgi, value, mode);
2426 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2430 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2431 ir_node *left, ir_node *right)
2434 type_t *type_left = skip_typeref(expression->left->base.type);
2435 type_t *type_right = skip_typeref(expression->right->base.type);
2437 expression_kind_t kind = expression->base.kind;
2440 case EXPR_BINARY_SHIFTLEFT:
2441 case EXPR_BINARY_SHIFTRIGHT:
2442 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2443 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2444 mode = get_ir_mode_arithmetic(expression->base.type);
2445 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2448 case EXPR_BINARY_SUB:
2449 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2450 const pointer_type_t *const ptr_type = &type_left->pointer;
2452 mode = get_ir_mode_arithmetic(expression->base.type);
2453 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2454 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2455 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2456 ir_node *const no_mem = new_NoMem();
2457 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2458 mode, op_pin_state_floats);
2459 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2462 case EXPR_BINARY_SUB_ASSIGN:
2463 if (is_type_pointer(type_left)) {
2464 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2465 mode = get_ir_mode_arithmetic(type_left);
2470 case EXPR_BINARY_ADD:
2471 case EXPR_BINARY_ADD_ASSIGN:
2472 if (is_type_pointer(type_left)) {
2473 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2474 mode = get_ir_mode_arithmetic(type_left);
2476 } else if (is_type_pointer(type_right)) {
2477 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2478 mode = get_ir_mode_arithmetic(type_right);
2485 mode = get_ir_mode_arithmetic(type_right);
2486 left = create_conv(dbgi, left, mode);
2491 case EXPR_BINARY_ADD_ASSIGN:
2492 case EXPR_BINARY_ADD:
2493 return new_d_Add(dbgi, left, right, mode);
2494 case EXPR_BINARY_SUB_ASSIGN:
2495 case EXPR_BINARY_SUB:
2496 return new_d_Sub(dbgi, left, right, mode);
2497 case EXPR_BINARY_MUL_ASSIGN:
2498 case EXPR_BINARY_MUL:
2499 return new_d_Mul(dbgi, left, right, mode);
2500 case EXPR_BINARY_BITWISE_AND:
2501 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2502 return new_d_And(dbgi, left, right, mode);
2503 case EXPR_BINARY_BITWISE_OR:
2504 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2505 return new_d_Or(dbgi, left, right, mode);
2506 case EXPR_BINARY_BITWISE_XOR:
2507 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2508 return new_d_Eor(dbgi, left, right, mode);
2509 case EXPR_BINARY_SHIFTLEFT:
2510 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2511 return new_d_Shl(dbgi, left, right, mode);
2512 case EXPR_BINARY_SHIFTRIGHT:
2513 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2514 if (mode_is_signed(mode)) {
2515 return new_d_Shrs(dbgi, left, right, mode);
2517 return new_d_Shr(dbgi, left, right, mode);
2519 case EXPR_BINARY_DIV:
2520 case EXPR_BINARY_DIV_ASSIGN: {
2521 ir_node *pin = new_Pin(new_NoMem());
2522 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2523 op_pin_state_floats);
2524 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2527 case EXPR_BINARY_MOD:
2528 case EXPR_BINARY_MOD_ASSIGN: {
2529 ir_node *pin = new_Pin(new_NoMem());
2530 assert(!mode_is_float(mode));
2531 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2532 op_pin_state_floats);
2533 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2537 panic("unexpected expression kind");
2541 static ir_node *create_lazy_op(const binary_expression_t *expression)
2543 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2544 type_t *type = skip_typeref(expression->base.type);
2545 ir_mode *mode = get_ir_mode_arithmetic(type);
2547 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2548 bool val = fold_constant_to_bool(expression->left);
2549 expression_kind_t ekind = expression->base.kind;
2550 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2551 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2553 return new_Const(get_mode_null(mode));
2557 return new_Const(get_mode_one(mode));
2561 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2562 bool valr = fold_constant_to_bool(expression->right);
2563 return create_Const_from_bool(mode, valr);
2566 return produce_condition_result(expression->right, mode, dbgi);
2569 return produce_condition_result((const expression_t*) expression, mode,
2573 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2574 ir_node *right, ir_mode *mode);
2576 static ir_node *create_assign_binop(const binary_expression_t *expression)
2578 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2579 const expression_t *left_expr = expression->left;
2580 type_t *type = skip_typeref(left_expr->base.type);
2581 ir_node *right = expression_to_firm(expression->right);
2582 ir_node *left_addr = expression_to_addr(left_expr);
2583 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2584 ir_node *result = create_op(dbgi, expression, left, right);
2586 result = create_cast(dbgi, result, expression->right->base.type, type);
2587 result = do_strict_conv(dbgi, result);
2589 result = set_value_for_expression_addr(left_expr, result, left_addr);
2591 if (!is_type_compound(type)) {
2592 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2593 result = create_conv(dbgi, result, mode_arithmetic);
2598 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2600 expression_kind_t kind = expression->base.kind;
2603 case EXPR_BINARY_EQUAL:
2604 case EXPR_BINARY_NOTEQUAL:
2605 case EXPR_BINARY_LESS:
2606 case EXPR_BINARY_LESSEQUAL:
2607 case EXPR_BINARY_GREATER:
2608 case EXPR_BINARY_GREATEREQUAL:
2609 case EXPR_BINARY_ISGREATER:
2610 case EXPR_BINARY_ISGREATEREQUAL:
2611 case EXPR_BINARY_ISLESS:
2612 case EXPR_BINARY_ISLESSEQUAL:
2613 case EXPR_BINARY_ISLESSGREATER:
2614 case EXPR_BINARY_ISUNORDERED: {
2615 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2616 ir_node *left = expression_to_firm(expression->left);
2617 ir_node *right = expression_to_firm(expression->right);
2618 ir_relation relation = get_relation(kind);
2619 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2622 case EXPR_BINARY_ASSIGN: {
2623 ir_node *addr = expression_to_addr(expression->left);
2624 ir_node *right = expression_to_firm(expression->right);
2626 = set_value_for_expression_addr(expression->left, right, addr);
2628 type_t *type = skip_typeref(expression->base.type);
2629 if (!is_type_compound(type)) {
2630 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2631 res = create_conv(NULL, res, mode_arithmetic);
2635 case EXPR_BINARY_ADD:
2636 case EXPR_BINARY_SUB:
2637 case EXPR_BINARY_MUL:
2638 case EXPR_BINARY_DIV:
2639 case EXPR_BINARY_MOD:
2640 case EXPR_BINARY_BITWISE_AND:
2641 case EXPR_BINARY_BITWISE_OR:
2642 case EXPR_BINARY_BITWISE_XOR:
2643 case EXPR_BINARY_SHIFTLEFT:
2644 case EXPR_BINARY_SHIFTRIGHT:
2646 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2647 ir_node *left = expression_to_firm(expression->left);
2648 ir_node *right = expression_to_firm(expression->right);
2649 return create_op(dbgi, expression, left, right);
2651 case EXPR_BINARY_LOGICAL_AND:
2652 case EXPR_BINARY_LOGICAL_OR:
2653 return create_lazy_op(expression);
2654 case EXPR_BINARY_COMMA:
2655 /* create side effects of left side */
2656 (void) expression_to_firm(expression->left);
2657 return _expression_to_firm(expression->right);
2659 case EXPR_BINARY_ADD_ASSIGN:
2660 case EXPR_BINARY_SUB_ASSIGN:
2661 case EXPR_BINARY_MUL_ASSIGN:
2662 case EXPR_BINARY_MOD_ASSIGN:
2663 case EXPR_BINARY_DIV_ASSIGN:
2664 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2665 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2666 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2667 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2668 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2669 return create_assign_binop(expression);
2671 panic("TODO binexpr type");
2675 static ir_node *array_access_addr(const array_access_expression_t *expression)
2677 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2678 ir_node *base_addr = expression_to_firm(expression->array_ref);
2679 ir_node *offset = expression_to_firm(expression->index);
2680 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2681 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2682 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2687 static ir_node *array_access_to_firm(
2688 const array_access_expression_t *expression)
2690 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2691 ir_node *addr = array_access_addr(expression);
2692 type_t *type = revert_automatic_type_conversion(
2693 (const expression_t*) expression);
2694 type = skip_typeref(type);
2696 return deref_address(dbgi, type, addr);
2699 static long get_offsetof_offset(const offsetof_expression_t *expression)
2701 type_t *orig_type = expression->type;
2704 designator_t *designator = expression->designator;
2705 for ( ; designator != NULL; designator = designator->next) {
2706 type_t *type = skip_typeref(orig_type);
2707 /* be sure the type is constructed */
2708 (void) get_ir_type(type);
2710 if (designator->symbol != NULL) {
2711 assert(is_type_compound(type));
2712 symbol_t *symbol = designator->symbol;
2714 compound_t *compound = type->compound.compound;
2715 entity_t *iter = compound->members.entities;
2716 for ( ; iter != NULL; iter = iter->base.next) {
2717 if (iter->base.symbol == symbol) {
2721 assert(iter != NULL);
2723 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2724 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2725 offset += get_entity_offset(iter->compound_member.entity);
2727 orig_type = iter->declaration.type;
2729 expression_t *array_index = designator->array_index;
2730 assert(designator->array_index != NULL);
2731 assert(is_type_array(type));
2733 long index = fold_constant_to_int(array_index);
2734 ir_type *arr_type = get_ir_type(type);
2735 ir_type *elem_type = get_array_element_type(arr_type);
2736 long elem_size = get_type_size_bytes(elem_type);
2738 offset += index * elem_size;
2740 orig_type = type->array.element_type;
2747 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2749 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2750 long offset = get_offsetof_offset(expression);
2751 ir_tarval *tv = new_tarval_from_long(offset, mode);
2752 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2754 return new_d_Const(dbgi, tv);
2757 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2758 ir_entity *entity, type_t *type);
2759 static ir_initializer_t *create_ir_initializer(
2760 const initializer_t *initializer, type_t *type);
2762 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2763 initializer_t *initializer,
2766 /* create the ir_initializer */
2767 ir_graph *const old_current_ir_graph = current_ir_graph;
2768 current_ir_graph = get_const_code_irg();
2770 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2772 assert(current_ir_graph == get_const_code_irg());
2773 current_ir_graph = old_current_ir_graph;
2775 ident *const id = id_unique("initializer.%u");
2776 ir_type *const irtype = get_ir_type(type);
2777 ir_type *const global_type = get_glob_type();
2778 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2779 set_entity_ld_ident(entity, id);
2780 set_entity_visibility(entity, ir_visibility_private);
2781 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2782 set_entity_initializer(entity, irinitializer);
2786 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2788 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2789 type_t *type = expression->type;
2790 initializer_t *initializer = expression->initializer;
2792 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2793 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2794 return create_symconst(dbgi, entity);
2796 /* create an entity on the stack */
2797 ident *const id = id_unique("CompLit.%u");
2798 ir_type *const irtype = get_ir_type(type);
2799 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2801 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2802 set_entity_ld_ident(entity, id);
2804 /* create initialisation code */
2805 create_local_initializer(initializer, dbgi, entity, type);
2807 /* create a sel for the compound literal address */
2808 ir_node *frame = get_irg_frame(current_ir_graph);
2809 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2814 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2816 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2817 type_t *const type = expr->type;
2818 ir_node *const addr = compound_literal_addr(expr);
2819 return deref_address(dbgi, type, addr);
2823 * Transform a sizeof expression into Firm code.
2825 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2827 type_t *const type = skip_typeref(expression->type);
2828 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2829 if (is_type_array(type) && type->array.is_vla
2830 && expression->tp_expression != NULL) {
2831 expression_to_firm(expression->tp_expression);
2834 return get_type_size_node(type);
2837 static entity_t *get_expression_entity(const expression_t *expression)
2839 if (expression->kind != EXPR_REFERENCE)
2842 return expression->reference.entity;
2845 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2847 switch(entity->kind) {
2848 case DECLARATION_KIND_CASES:
2849 return entity->declaration.alignment;
2852 return entity->compound.alignment;
2853 case ENTITY_TYPEDEF:
2854 return entity->typedefe.alignment;
2862 * Transform an alignof expression into Firm code.
2864 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2866 unsigned alignment = 0;
2868 const expression_t *tp_expression = expression->tp_expression;
2869 if (tp_expression != NULL) {
2870 entity_t *entity = get_expression_entity(tp_expression);
2871 if (entity != NULL) {
2872 alignment = get_cparser_entity_alignment(entity);
2876 if (alignment == 0) {
2877 type_t *type = expression->type;
2878 alignment = get_type_alignment(type);
2881 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2882 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2883 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2884 return new_d_Const(dbgi, tv);
2887 static void init_ir_types(void);
2889 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2891 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2893 bool constant_folding_old = constant_folding;
2894 constant_folding = true;
2895 int old_optimize = get_optimize();
2896 int old_constant_folding = get_opt_constant_folding();
2898 set_opt_constant_folding(1);
2902 ir_graph *old_current_ir_graph = current_ir_graph;
2903 current_ir_graph = get_const_code_irg();
2905 ir_node *const cnst = _expression_to_firm(expression);
2907 current_ir_graph = old_current_ir_graph;
2908 set_optimize(old_optimize);
2909 set_opt_constant_folding(old_constant_folding);
2911 if (!is_Const(cnst)) {
2912 panic("couldn't fold constant");
2915 constant_folding = constant_folding_old;
2917 ir_tarval *const tv = get_Const_tarval(cnst);
2918 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2919 return tarval_convert_to(tv, mode);
2922 /* this function is only used in parser.c, but it relies on libfirm functionality */
2923 bool constant_is_negative(const expression_t *expression)
2925 ir_tarval *tv = fold_constant_to_tarval(expression);
2926 return tarval_is_negative(tv);
2929 long fold_constant_to_int(const expression_t *expression)
2931 ir_tarval *tv = fold_constant_to_tarval(expression);
2932 if (!tarval_is_long(tv)) {
2933 panic("result of constant folding is not integer");
2936 return get_tarval_long(tv);
2939 bool fold_constant_to_bool(const expression_t *expression)
2941 ir_tarval *tv = fold_constant_to_tarval(expression);
2942 return !tarval_is_null(tv);
2945 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2947 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2949 /* first try to fold a constant condition */
2950 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2951 bool val = fold_constant_to_bool(expression->condition);
2953 expression_t *true_expression = expression->true_expression;
2954 if (true_expression == NULL)
2955 true_expression = expression->condition;
2956 return expression_to_firm(true_expression);
2958 return expression_to_firm(expression->false_expression);
2962 ir_node *const true_block = new_immBlock();
2963 ir_node *const false_block = new_immBlock();
2964 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2965 mature_immBlock(true_block);
2966 mature_immBlock(false_block);
2968 set_cur_block(true_block);
2970 if (expression->true_expression != NULL) {
2971 true_val = expression_to_firm(expression->true_expression);
2972 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2973 true_val = cond_expr;
2975 /* Condition ended with a short circuit (&&, ||, !) operation or a
2976 * comparison. Generate a "1" as value for the true branch. */
2977 true_val = new_Const(get_mode_one(mode_Is));
2979 ir_node *const true_jmp = new_d_Jmp(dbgi);
2981 set_cur_block(false_block);
2982 ir_node *const false_val = expression_to_firm(expression->false_expression);
2983 ir_node *const false_jmp = new_d_Jmp(dbgi);
2985 /* create the common block */
2986 ir_node *const in_cf[2] = { true_jmp, false_jmp };
2987 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2988 set_cur_block(block);
2990 /* TODO improve static semantics, so either both or no values are NULL */
2991 if (true_val == NULL || false_val == NULL)
2994 ir_node *const in[2] = { true_val, false_val };
2995 type_t *const type = skip_typeref(expression->base.type);
2996 ir_mode *const mode = get_ir_mode_arithmetic(type);
2997 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3003 * Returns an IR-node representing the address of a field.
3005 static ir_node *select_addr(const select_expression_t *expression)
3007 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3009 construct_select_compound(expression);
3011 ir_node *compound_addr = expression_to_firm(expression->compound);
3013 entity_t *entry = expression->compound_entry;
3014 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3015 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3017 if (constant_folding) {
3018 ir_mode *mode = get_irn_mode(compound_addr);
3019 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3020 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3021 return new_d_Add(dbgi, compound_addr, ofs, mode);
3023 ir_entity *irentity = entry->compound_member.entity;
3024 assert(irentity != NULL);
3025 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3029 static ir_node *select_to_firm(const select_expression_t *expression)
3031 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3032 ir_node *addr = select_addr(expression);
3033 type_t *type = revert_automatic_type_conversion(
3034 (const expression_t*) expression);
3035 type = skip_typeref(type);
3037 entity_t *entry = expression->compound_entry;
3038 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3040 if (entry->compound_member.bitfield) {
3041 return bitfield_extract_to_firm(expression, addr);
3044 return deref_address(dbgi, type, addr);
3047 /* Values returned by __builtin_classify_type. */
3048 typedef enum gcc_type_class
3054 enumeral_type_class,
3057 reference_type_class,
3061 function_type_class,
3072 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3074 type_t *type = expr->type_expression->base.type;
3076 /* FIXME gcc returns different values depending on whether compiling C or C++
3077 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3080 type = skip_typeref(type);
3081 switch (type->kind) {
3083 const atomic_type_t *const atomic_type = &type->atomic;
3084 switch (atomic_type->akind) {
3085 /* should not be reached */
3086 case ATOMIC_TYPE_INVALID:
3090 /* gcc cannot do that */
3091 case ATOMIC_TYPE_VOID:
3092 tc = void_type_class;
3095 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3096 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3097 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3098 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3099 case ATOMIC_TYPE_SHORT:
3100 case ATOMIC_TYPE_USHORT:
3101 case ATOMIC_TYPE_INT:
3102 case ATOMIC_TYPE_UINT:
3103 case ATOMIC_TYPE_LONG:
3104 case ATOMIC_TYPE_ULONG:
3105 case ATOMIC_TYPE_LONGLONG:
3106 case ATOMIC_TYPE_ULONGLONG:
3107 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3108 tc = integer_type_class;
3111 case ATOMIC_TYPE_FLOAT:
3112 case ATOMIC_TYPE_DOUBLE:
3113 case ATOMIC_TYPE_LONG_DOUBLE:
3114 tc = real_type_class;
3117 panic("Unexpected atomic type in classify_type_to_firm().");
3120 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3121 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3122 case TYPE_ARRAY: /* gcc handles this as pointer */
3123 case TYPE_FUNCTION: /* gcc handles this as pointer */
3124 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3125 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3126 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3128 /* gcc handles this as integer */
3129 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3131 /* gcc classifies the referenced type */
3132 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3134 /* typedef/typeof should be skipped already */
3140 panic("unexpected TYPE classify_type_to_firm().");
3144 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3145 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3146 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3147 return new_d_Const(dbgi, tv);
3150 static ir_node *function_name_to_firm(
3151 const funcname_expression_t *const expr)
3153 switch(expr->kind) {
3154 case FUNCNAME_FUNCTION:
3155 case FUNCNAME_PRETTY_FUNCTION:
3156 case FUNCNAME_FUNCDNAME:
3157 if (current_function_name == NULL) {
3158 const source_position_t *const src_pos = &expr->base.source_position;
3159 const char *name = current_function_entity->base.symbol->string;
3160 const string_t string = { name, strlen(name) + 1 };
3161 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3163 return current_function_name;
3164 case FUNCNAME_FUNCSIG:
3165 if (current_funcsig == NULL) {
3166 const source_position_t *const src_pos = &expr->base.source_position;
3167 ir_entity *ent = get_irg_entity(current_ir_graph);
3168 const char *const name = get_entity_ld_name(ent);
3169 const string_t string = { name, strlen(name) + 1 };
3170 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3172 return current_funcsig;
3174 panic("Unsupported function name");
3177 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3179 statement_t *statement = expr->statement;
3181 assert(statement->kind == STATEMENT_COMPOUND);
3182 return compound_statement_to_firm(&statement->compound);
3185 static ir_node *va_start_expression_to_firm(
3186 const va_start_expression_t *const expr)
3188 ir_entity *param_ent = current_vararg_entity;
3189 if (param_ent == NULL) {
3190 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3191 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3192 ir_type *const param_type = get_unknown_type();
3193 param_ent = new_parameter_entity(frame_type, n, param_type);
3194 current_vararg_entity = param_ent;
3197 ir_node *const frame = get_irg_frame(current_ir_graph);
3198 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3199 ir_node *const no_mem = new_NoMem();
3200 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3202 set_value_for_expression(expr->ap, arg_sel);
3207 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3209 type_t *const type = expr->base.type;
3210 expression_t *const ap_expr = expr->ap;
3211 ir_node *const ap_addr = expression_to_addr(ap_expr);
3212 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3213 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3214 ir_node *const res = deref_address(dbgi, type, ap);
3216 ir_node *const cnst = get_type_size_node(expr->base.type);
3217 ir_mode *const mode = get_irn_mode(cnst);
3218 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3219 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3220 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3221 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3222 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3224 set_value_for_expression_addr(ap_expr, add, ap_addr);
3230 * Generate Firm for a va_copy expression.
3232 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3234 ir_node *const src = expression_to_firm(expr->src);
3235 set_value_for_expression(expr->dst, src);
3239 static ir_node *dereference_addr(const unary_expression_t *const expression)
3241 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3242 return expression_to_firm(expression->value);
3246 * Returns a IR-node representing an lvalue of the given expression.
3248 static ir_node *expression_to_addr(const expression_t *expression)
3250 switch(expression->kind) {
3251 case EXPR_ARRAY_ACCESS:
3252 return array_access_addr(&expression->array_access);
3254 return call_expression_to_firm(&expression->call);
3255 case EXPR_COMPOUND_LITERAL:
3256 return compound_literal_addr(&expression->compound_literal);
3257 case EXPR_REFERENCE:
3258 return reference_addr(&expression->reference);
3260 return select_addr(&expression->select);
3261 case EXPR_UNARY_DEREFERENCE:
3262 return dereference_addr(&expression->unary);
3266 panic("trying to get address of non-lvalue");
3269 static ir_node *builtin_constant_to_firm(
3270 const builtin_constant_expression_t *expression)
3272 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3273 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3274 return create_Const_from_bool(mode, v);
3277 static ir_node *builtin_types_compatible_to_firm(
3278 const builtin_types_compatible_expression_t *expression)
3280 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3281 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3282 bool const value = types_compatible(left, right);
3283 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3284 return create_Const_from_bool(mode, value);
3287 static ir_node *get_label_block(label_t *label)
3289 if (label->block != NULL)
3290 return label->block;
3292 /* beware: might be called from create initializer with current_ir_graph
3293 * set to const_code_irg. */
3294 ir_graph *rem = current_ir_graph;
3295 current_ir_graph = current_function;
3297 ir_node *block = new_immBlock();
3299 label->block = block;
3301 ARR_APP1(label_t *, all_labels, label);
3303 current_ir_graph = rem;
3308 * Pointer to a label. This is used for the
3309 * GNU address-of-label extension.
3311 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3313 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3314 ir_node *block = get_label_block(label->label);
3315 ir_entity *entity = create_Block_entity(block);
3317 symconst_symbol value;
3318 value.entity_p = entity;
3319 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3323 * creates firm nodes for an expression. The difference between this function
3324 * and expression_to_firm is, that this version might produce mode_b nodes
3325 * instead of mode_Is.
3327 static ir_node *_expression_to_firm(expression_t const *const expr)
3330 if (!constant_folding) {
3331 assert(!expr->base.transformed);
3332 ((expression_t*)expr)->base.transformed = true;
3336 switch (expr->kind) {
3337 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3338 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3339 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3340 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3341 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3342 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3343 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3344 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3345 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3346 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3347 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3348 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3349 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3350 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3351 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3352 case EXPR_SELECT: return select_to_firm( &expr->select);
3353 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3354 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3355 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3356 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3357 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3358 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3359 case EXPR_WIDE_STRING_LITERAL: return wide_string_literal_to_firm( &expr->string_literal);
3361 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3363 case EXPR_ERROR: break;
3365 panic("invalid expression found");
3369 * Check if a given expression is a GNU __builtin_expect() call.
3371 static bool is_builtin_expect(const expression_t *expression)
3373 if (expression->kind != EXPR_CALL)
3376 expression_t *function = expression->call.function;
3377 if (function->kind != EXPR_REFERENCE)
3379 reference_expression_t *ref = &function->reference;
3380 if (ref->entity->kind != ENTITY_FUNCTION ||
3381 ref->entity->function.btk != BUILTIN_EXPECT)
3387 static bool produces_mode_b(const expression_t *expression)
3389 switch (expression->kind) {
3390 case EXPR_BINARY_EQUAL:
3391 case EXPR_BINARY_NOTEQUAL:
3392 case EXPR_BINARY_LESS:
3393 case EXPR_BINARY_LESSEQUAL:
3394 case EXPR_BINARY_GREATER:
3395 case EXPR_BINARY_GREATEREQUAL:
3396 case EXPR_BINARY_ISGREATER:
3397 case EXPR_BINARY_ISGREATEREQUAL:
3398 case EXPR_BINARY_ISLESS:
3399 case EXPR_BINARY_ISLESSEQUAL:
3400 case EXPR_BINARY_ISLESSGREATER:
3401 case EXPR_BINARY_ISUNORDERED:
3402 case EXPR_UNARY_NOT:
3406 if (is_builtin_expect(expression)) {
3407 expression_t *argument = expression->call.arguments->expression;
3408 return produces_mode_b(argument);
3411 case EXPR_BINARY_COMMA:
3412 return produces_mode_b(expression->binary.right);
3419 static ir_node *expression_to_firm(const expression_t *expression)
3421 if (!produces_mode_b(expression)) {
3422 ir_node *res = _expression_to_firm(expression);
3423 assert(res == NULL || get_irn_mode(res) != mode_b);
3427 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3428 return new_Const(fold_constant_to_tarval(expression));
3431 /* we have to produce a 0/1 from the mode_b expression */
3432 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3433 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3434 return produce_condition_result(expression, mode, dbgi);
3438 * create a short-circuit expression evaluation that tries to construct
3439 * efficient control flow structures for &&, || and ! expressions
3441 static ir_node *create_condition_evaluation(const expression_t *expression,
3442 ir_node *true_block,
3443 ir_node *false_block)
3445 switch(expression->kind) {
3446 case EXPR_UNARY_NOT: {
3447 const unary_expression_t *unary_expression = &expression->unary;
3448 create_condition_evaluation(unary_expression->value, false_block,
3452 case EXPR_BINARY_LOGICAL_AND: {
3453 const binary_expression_t *binary_expression = &expression->binary;
3455 ir_node *extra_block = new_immBlock();
3456 create_condition_evaluation(binary_expression->left, extra_block,
3458 mature_immBlock(extra_block);
3459 set_cur_block(extra_block);
3460 create_condition_evaluation(binary_expression->right, true_block,
3464 case EXPR_BINARY_LOGICAL_OR: {
3465 const binary_expression_t *binary_expression = &expression->binary;
3467 ir_node *extra_block = new_immBlock();
3468 create_condition_evaluation(binary_expression->left, true_block,
3470 mature_immBlock(extra_block);
3471 set_cur_block(extra_block);
3472 create_condition_evaluation(binary_expression->right, true_block,
3480 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3481 ir_node *cond_expr = _expression_to_firm(expression);
3482 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3483 ir_node *cond = new_d_Cond(dbgi, condition);
3484 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3485 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3487 /* set branch prediction info based on __builtin_expect */
3488 if (is_builtin_expect(expression) && is_Cond(cond)) {
3489 call_argument_t *argument = expression->call.arguments->next;
3490 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3491 bool const cnst = fold_constant_to_bool(argument->expression);
3492 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3493 set_Cond_jmp_pred(cond, pred);
3497 add_immBlock_pred(true_block, true_proj);
3498 add_immBlock_pred(false_block, false_proj);
3500 set_unreachable_now();
3504 static void create_variable_entity(entity_t *variable,
3505 declaration_kind_t declaration_kind,
3506 ir_type *parent_type)
3508 assert(variable->kind == ENTITY_VARIABLE);
3509 type_t *type = skip_typeref(variable->declaration.type);
3511 ident *const id = new_id_from_str(variable->base.symbol->string);
3512 ir_type *const irtype = get_ir_type(type);
3513 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3514 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3515 unsigned alignment = variable->declaration.alignment;
3517 set_entity_alignment(irentity, alignment);
3519 handle_decl_modifiers(irentity, variable);
3521 variable->declaration.kind = (unsigned char) declaration_kind;
3522 variable->variable.v.entity = irentity;
3523 set_entity_ld_ident(irentity, create_ld_ident(variable));
3525 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3526 set_entity_volatility(irentity, volatility_is_volatile);
3531 typedef struct type_path_entry_t type_path_entry_t;
3532 struct type_path_entry_t {
3534 ir_initializer_t *initializer;
3536 entity_t *compound_entry;
3539 typedef struct type_path_t type_path_t;
3540 struct type_path_t {
3541 type_path_entry_t *path;
3546 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3548 size_t len = ARR_LEN(path->path);
3550 for (size_t i = 0; i < len; ++i) {
3551 const type_path_entry_t *entry = & path->path[i];
3553 type_t *type = skip_typeref(entry->type);
3554 if (is_type_compound(type)) {
3555 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3556 } else if (is_type_array(type)) {
3557 fprintf(stderr, "[%u]", (unsigned) entry->index);
3559 fprintf(stderr, "-INVALID-");
3562 fprintf(stderr, " (");
3563 print_type(path->top_type);
3564 fprintf(stderr, ")");
3567 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3569 size_t len = ARR_LEN(path->path);
3571 return & path->path[len-1];
3574 static type_path_entry_t *append_to_type_path(type_path_t *path)
3576 size_t len = ARR_LEN(path->path);
3577 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3579 type_path_entry_t *result = & path->path[len];
3580 memset(result, 0, sizeof(result[0]));
3584 static size_t get_compound_member_count(const compound_type_t *type)
3586 compound_t *compound = type->compound;
3587 size_t n_members = 0;
3588 entity_t *member = compound->members.entities;
3589 for ( ; member != NULL; member = member->base.next) {
3596 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3598 type_t *orig_top_type = path->top_type;
3599 type_t *top_type = skip_typeref(orig_top_type);
3601 assert(is_type_compound(top_type) || is_type_array(top_type));
3603 if (ARR_LEN(path->path) == 0) {
3606 type_path_entry_t *top = get_type_path_top(path);
3607 ir_initializer_t *initializer = top->initializer;
3608 return get_initializer_compound_value(initializer, top->index);
3612 static void descend_into_subtype(type_path_t *path)
3614 type_t *orig_top_type = path->top_type;
3615 type_t *top_type = skip_typeref(orig_top_type);
3617 assert(is_type_compound(top_type) || is_type_array(top_type));
3619 ir_initializer_t *initializer = get_initializer_entry(path);
3621 type_path_entry_t *top = append_to_type_path(path);
3622 top->type = top_type;
3626 if (is_type_compound(top_type)) {
3627 compound_t *const compound = top_type->compound.compound;
3628 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3630 top->compound_entry = entry;
3632 len = get_compound_member_count(&top_type->compound);
3633 if (entry != NULL) {
3634 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3635 path->top_type = entry->declaration.type;
3638 assert(is_type_array(top_type));
3639 assert(top_type->array.size > 0);
3642 path->top_type = top_type->array.element_type;
3643 len = top_type->array.size;
3645 if (initializer == NULL
3646 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3647 initializer = create_initializer_compound(len);
3648 /* we have to set the entry at the 2nd latest path entry... */
3649 size_t path_len = ARR_LEN(path->path);
3650 assert(path_len >= 1);
3652 type_path_entry_t *entry = & path->path[path_len-2];
3653 ir_initializer_t *tinitializer = entry->initializer;
3654 set_initializer_compound_value(tinitializer, entry->index,
3658 top->initializer = initializer;
3661 static void ascend_from_subtype(type_path_t *path)
3663 type_path_entry_t *top = get_type_path_top(path);
3665 path->top_type = top->type;
3667 size_t len = ARR_LEN(path->path);
3668 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3671 static void walk_designator(type_path_t *path, const designator_t *designator)
3673 /* designators start at current object type */
3674 ARR_RESIZE(type_path_entry_t, path->path, 1);
3676 for ( ; designator != NULL; designator = designator->next) {
3677 type_path_entry_t *top = get_type_path_top(path);
3678 type_t *orig_type = top->type;
3679 type_t *type = skip_typeref(orig_type);
3681 if (designator->symbol != NULL) {
3682 assert(is_type_compound(type));
3684 symbol_t *symbol = designator->symbol;
3686 compound_t *compound = type->compound.compound;
3687 entity_t *iter = compound->members.entities;
3688 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3689 if (iter->base.symbol == symbol) {
3690 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3694 assert(iter != NULL);
3696 /* revert previous initialisations of other union elements */
3697 if (type->kind == TYPE_COMPOUND_UNION) {
3698 ir_initializer_t *initializer = top->initializer;
3699 if (initializer != NULL
3700 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3701 /* are we writing to a new element? */
3702 ir_initializer_t *oldi
3703 = get_initializer_compound_value(initializer, index);
3704 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3705 /* clear initializer */
3707 = get_initializer_compound_n_entries(initializer);
3708 ir_initializer_t *nulli = get_initializer_null();
3709 for (size_t i = 0; i < len; ++i) {
3710 set_initializer_compound_value(initializer, i,
3717 top->type = orig_type;
3718 top->compound_entry = iter;
3720 orig_type = iter->declaration.type;
3722 expression_t *array_index = designator->array_index;
3723 assert(designator->array_index != NULL);
3724 assert(is_type_array(type));
3726 long index = fold_constant_to_int(array_index);
3729 if (type->array.size_constant) {
3730 long array_size = type->array.size;
3731 assert(index < array_size);
3735 top->type = orig_type;
3736 top->index = (size_t) index;
3737 orig_type = type->array.element_type;
3739 path->top_type = orig_type;
3741 if (designator->next != NULL) {
3742 descend_into_subtype(path);
3746 path->invalid = false;
3749 static void advance_current_object(type_path_t *path)
3751 if (path->invalid) {
3752 /* TODO: handle this... */
3753 panic("invalid initializer in ast2firm (excessive elements)");
3756 type_path_entry_t *top = get_type_path_top(path);
3758 type_t *type = skip_typeref(top->type);
3759 if (is_type_union(type)) {
3760 /* only the first element is initialized in unions */
3761 top->compound_entry = NULL;
3762 } else if (is_type_struct(type)) {
3763 entity_t *entry = top->compound_entry;
3766 entry = skip_unnamed_bitfields(entry->base.next);
3767 top->compound_entry = entry;
3768 if (entry != NULL) {
3769 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3770 path->top_type = entry->declaration.type;
3774 assert(is_type_array(type));
3777 if (!type->array.size_constant || top->index < type->array.size) {
3782 /* we're past the last member of the current sub-aggregate, try if we
3783 * can ascend in the type hierarchy and continue with another subobject */
3784 size_t len = ARR_LEN(path->path);
3787 ascend_from_subtype(path);
3788 advance_current_object(path);
3790 path->invalid = true;
3795 static ir_initializer_t *create_ir_initializer_value(
3796 const initializer_value_t *initializer)
3798 if (is_type_compound(initializer->value->base.type)) {
3799 panic("initializer creation for compounds not implemented yet");
3801 type_t *type = initializer->value->base.type;
3802 expression_t *expr = initializer->value;
3803 ir_node *value = expression_to_firm(expr);
3804 ir_mode *mode = get_ir_mode_storage(type);
3805 value = create_conv(NULL, value, mode);
3806 return create_initializer_const(value);
3809 /** test wether type can be initialized by a string constant */
3810 static bool is_string_type(type_t *type)
3813 if (is_type_pointer(type)) {
3814 inner = skip_typeref(type->pointer.points_to);
3815 } else if(is_type_array(type)) {
3816 inner = skip_typeref(type->array.element_type);
3821 return is_type_integer(inner);
3824 static ir_initializer_t *create_ir_initializer_list(
3825 const initializer_list_t *initializer, type_t *type)
3828 memset(&path, 0, sizeof(path));
3829 path.top_type = type;
3830 path.path = NEW_ARR_F(type_path_entry_t, 0);
3832 descend_into_subtype(&path);
3834 for (size_t i = 0; i < initializer->len; ++i) {
3835 const initializer_t *sub_initializer = initializer->initializers[i];
3837 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3838 walk_designator(&path, sub_initializer->designator.designator);
3842 if (sub_initializer->kind == INITIALIZER_VALUE) {
3843 /* we might have to descend into types until we're at a scalar
3846 type_t *orig_top_type = path.top_type;
3847 type_t *top_type = skip_typeref(orig_top_type);
3849 if (is_type_scalar(top_type))
3851 descend_into_subtype(&path);
3853 } else if (sub_initializer->kind == INITIALIZER_STRING
3854 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3855 /* we might have to descend into types until we're at a scalar
3858 type_t *orig_top_type = path.top_type;
3859 type_t *top_type = skip_typeref(orig_top_type);
3861 if (is_string_type(top_type))
3863 descend_into_subtype(&path);
3867 ir_initializer_t *sub_irinitializer
3868 = create_ir_initializer(sub_initializer, path.top_type);
3870 size_t path_len = ARR_LEN(path.path);
3871 assert(path_len >= 1);
3872 type_path_entry_t *entry = & path.path[path_len-1];
3873 ir_initializer_t *tinitializer = entry->initializer;
3874 set_initializer_compound_value(tinitializer, entry->index,
3877 advance_current_object(&path);
3880 assert(ARR_LEN(path.path) >= 1);
3881 ir_initializer_t *result = path.path[0].initializer;
3882 DEL_ARR_F(path.path);
3887 static ir_initializer_t *create_ir_initializer_string(
3888 const initializer_string_t *initializer, type_t *type)
3890 type = skip_typeref(type);
3892 size_t string_len = initializer->string.size;
3893 assert(type->kind == TYPE_ARRAY);
3894 assert(type->array.size_constant);
3895 size_t len = type->array.size;
3896 ir_initializer_t *irinitializer = create_initializer_compound(len);
3898 const char *string = initializer->string.begin;
3899 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3901 for (size_t i = 0; i < len; ++i) {
3906 ir_tarval *tv = new_tarval_from_long(c, mode);
3907 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3909 set_initializer_compound_value(irinitializer, i, char_initializer);
3912 return irinitializer;
3915 static ir_initializer_t *create_ir_initializer_wide_string(
3916 const initializer_wide_string_t *initializer, type_t *type)
3918 assert(type->kind == TYPE_ARRAY);
3919 assert(type->array.size_constant);
3920 size_t len = type->array.size;
3921 size_t string_len = wstrlen(&initializer->string);
3922 ir_initializer_t *irinitializer = create_initializer_compound(len);
3924 const char *p = initializer->string.begin;
3925 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3927 for (size_t i = 0; i < len; ++i) {
3929 if (i < string_len) {
3930 c = read_utf8_char(&p);
3932 ir_tarval *tv = new_tarval_from_long(c, mode);
3933 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3935 set_initializer_compound_value(irinitializer, i, char_initializer);
3938 return irinitializer;
3941 static ir_initializer_t *create_ir_initializer(
3942 const initializer_t *initializer, type_t *type)
3944 switch(initializer->kind) {
3945 case INITIALIZER_STRING:
3946 return create_ir_initializer_string(&initializer->string, type);
3948 case INITIALIZER_WIDE_STRING:
3949 return create_ir_initializer_wide_string(&initializer->wide_string,
3952 case INITIALIZER_LIST:
3953 return create_ir_initializer_list(&initializer->list, type);
3955 case INITIALIZER_VALUE:
3956 return create_ir_initializer_value(&initializer->value);
3958 case INITIALIZER_DESIGNATOR:
3959 panic("unexpected designator initializer found");
3961 panic("unknown initializer");
3964 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3965 * are elements [...] the remainder of the aggregate shall be initialized
3966 * implicitly the same as objects that have static storage duration. */
3967 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3970 /* for unions we must NOT do anything for null initializers */
3971 ir_type *owner = get_entity_owner(entity);
3972 if (is_Union_type(owner)) {
3976 ir_type *ent_type = get_entity_type(entity);
3977 /* create sub-initializers for a compound type */
3978 if (is_compound_type(ent_type)) {
3979 unsigned n_members = get_compound_n_members(ent_type);
3980 for (unsigned n = 0; n < n_members; ++n) {
3981 ir_entity *member = get_compound_member(ent_type, n);
3982 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3984 create_dynamic_null_initializer(member, dbgi, addr);
3988 if (is_Array_type(ent_type)) {
3989 assert(has_array_upper_bound(ent_type, 0));
3990 long n = get_array_upper_bound_int(ent_type, 0);
3991 for (long i = 0; i < n; ++i) {
3992 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3993 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3994 ir_node *cnst = new_d_Const(dbgi, index_tv);
3995 ir_node *in[1] = { cnst };
3996 ir_entity *arrent = get_array_element_entity(ent_type);
3997 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3999 create_dynamic_null_initializer(arrent, dbgi, addr);
4004 ir_mode *value_mode = get_type_mode(ent_type);
4005 ir_node *node = new_Const(get_mode_null(value_mode));
4007 /* is it a bitfield type? */
4008 if (is_Primitive_type(ent_type) &&
4009 get_primitive_base_type(ent_type) != NULL) {
4010 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4014 ir_node *mem = get_store();
4015 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4016 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4020 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4021 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4023 switch(get_initializer_kind(initializer)) {
4024 case IR_INITIALIZER_NULL:
4025 create_dynamic_null_initializer(entity, dbgi, base_addr);
4027 case IR_INITIALIZER_CONST: {
4028 ir_node *node = get_initializer_const_value(initializer);
4029 ir_type *ent_type = get_entity_type(entity);
4031 /* is it a bitfield type? */
4032 if (is_Primitive_type(ent_type) &&
4033 get_primitive_base_type(ent_type) != NULL) {
4034 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4038 assert(get_type_mode(type) == get_irn_mode(node));
4039 ir_node *mem = get_store();
4040 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4041 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4045 case IR_INITIALIZER_TARVAL: {
4046 ir_tarval *tv = get_initializer_tarval_value(initializer);
4047 ir_node *cnst = new_d_Const(dbgi, tv);
4048 ir_type *ent_type = get_entity_type(entity);
4050 /* is it a bitfield type? */
4051 if (is_Primitive_type(ent_type) &&
4052 get_primitive_base_type(ent_type) != NULL) {
4053 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4057 assert(get_type_mode(type) == get_tarval_mode(tv));
4058 ir_node *mem = get_store();
4059 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4060 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4064 case IR_INITIALIZER_COMPOUND: {
4065 assert(is_compound_type(type) || is_Array_type(type));
4067 if (is_Array_type(type)) {
4068 assert(has_array_upper_bound(type, 0));
4069 n_members = get_array_upper_bound_int(type, 0);
4071 n_members = get_compound_n_members(type);
4074 if (get_initializer_compound_n_entries(initializer)
4075 != (unsigned) n_members)
4076 panic("initializer doesn't match compound type");
4078 for (int i = 0; i < n_members; ++i) {
4081 ir_entity *sub_entity;
4082 if (is_Array_type(type)) {
4083 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4084 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4085 ir_node *cnst = new_d_Const(dbgi, index_tv);
4086 ir_node *in[1] = { cnst };
4087 irtype = get_array_element_type(type);
4088 sub_entity = get_array_element_entity(type);
4089 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4092 sub_entity = get_compound_member(type, i);
4093 irtype = get_entity_type(sub_entity);
4094 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4098 ir_initializer_t *sub_init
4099 = get_initializer_compound_value(initializer, i);
4101 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4108 panic("invalid IR_INITIALIZER found");
4111 static void create_dynamic_initializer(ir_initializer_t *initializer,
4112 dbg_info *dbgi, ir_entity *entity)
4114 ir_node *frame = get_irg_frame(current_ir_graph);
4115 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4116 ir_type *type = get_entity_type(entity);
4118 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4121 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4122 ir_entity *entity, type_t *type)
4124 ir_node *memory = get_store();
4125 ir_node *nomem = new_NoMem();
4126 ir_node *frame = get_irg_frame(current_ir_graph);
4127 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4129 if (initializer->kind == INITIALIZER_VALUE) {
4130 initializer_value_t *initializer_value = &initializer->value;
4132 ir_node *value = expression_to_firm(initializer_value->value);
4133 type = skip_typeref(type);
4134 assign_value(dbgi, addr, type, value);
4138 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4139 ir_initializer_t *irinitializer
4140 = create_ir_initializer(initializer, type);
4142 create_dynamic_initializer(irinitializer, dbgi, entity);
4146 /* create a "template" entity which is copied to the entity on the stack */
4147 ir_entity *const init_entity
4148 = create_initializer_entity(dbgi, initializer, type);
4149 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4150 ir_type *const irtype = get_ir_type(type);
4151 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4153 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4154 set_store(copyb_mem);
4157 static void create_initializer_local_variable_entity(entity_t *entity)
4159 assert(entity->kind == ENTITY_VARIABLE);
4160 initializer_t *initializer = entity->variable.initializer;
4161 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4162 ir_entity *irentity = entity->variable.v.entity;
4163 type_t *type = entity->declaration.type;
4165 create_local_initializer(initializer, dbgi, irentity, type);
4168 static void create_variable_initializer(entity_t *entity)
4170 assert(entity->kind == ENTITY_VARIABLE);
4171 initializer_t *initializer = entity->variable.initializer;
4172 if (initializer == NULL)
4175 declaration_kind_t declaration_kind
4176 = (declaration_kind_t) entity->declaration.kind;
4177 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4178 create_initializer_local_variable_entity(entity);
4182 type_t *type = entity->declaration.type;
4183 type_qualifiers_t tq = get_type_qualifier(type, true);
4185 if (initializer->kind == INITIALIZER_VALUE) {
4186 expression_t * value = initializer->value.value;
4187 type_t *const init_type = skip_typeref(value->base.type);
4189 if (!is_type_scalar(init_type)) {
4191 while (value->kind == EXPR_UNARY_CAST)
4192 value = value->unary.value;
4194 if (value->kind != EXPR_COMPOUND_LITERAL)
4195 panic("expected non-scalar initializer to be a compound literal");
4196 initializer = value->compound_literal.initializer;
4197 goto have_initializer;
4200 ir_node * node = expression_to_firm(value);
4201 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4202 ir_mode *const mode = get_ir_mode_storage(init_type);
4203 node = create_conv(dbgi, node, mode);
4204 node = do_strict_conv(dbgi, node);
4206 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4207 set_value(entity->variable.v.value_number, node);
4209 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4211 ir_entity *irentity = entity->variable.v.entity;
4213 if (tq & TYPE_QUALIFIER_CONST
4214 && get_entity_owner(irentity) != get_tls_type()) {
4215 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4217 set_atomic_ent_value(irentity, node);
4221 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4222 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4224 ir_entity *irentity = entity->variable.v.entity;
4225 ir_initializer_t *irinitializer
4226 = create_ir_initializer(initializer, type);
4228 if (tq & TYPE_QUALIFIER_CONST) {
4229 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4231 set_entity_initializer(irentity, irinitializer);
4235 static void create_variable_length_array(entity_t *entity)
4237 assert(entity->kind == ENTITY_VARIABLE);
4238 assert(entity->variable.initializer == NULL);
4240 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4241 entity->variable.v.vla_base = NULL;
4243 /* TODO: record VLA somewhere so we create the free node when we leave
4247 static void allocate_variable_length_array(entity_t *entity)
4249 assert(entity->kind == ENTITY_VARIABLE);
4250 assert(entity->variable.initializer == NULL);
4251 assert(currently_reachable());
4253 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4254 type_t *type = entity->declaration.type;
4255 ir_type *el_type = get_ir_type(type->array.element_type);
4257 /* make sure size_node is calculated */
4258 get_type_size_node(type);
4259 ir_node *elems = type->array.size_node;
4260 ir_node *mem = get_store();
4261 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4263 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4264 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4267 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4268 entity->variable.v.vla_base = addr;
4272 * Creates a Firm local variable from a declaration.
4274 static void create_local_variable(entity_t *entity)
4276 assert(entity->kind == ENTITY_VARIABLE);
4277 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4279 bool needs_entity = entity->variable.address_taken;
4280 type_t *type = skip_typeref(entity->declaration.type);
4282 /* is it a variable length array? */
4283 if (is_type_array(type) && !type->array.size_constant) {
4284 create_variable_length_array(entity);
4286 } else if (is_type_array(type) || is_type_compound(type)) {
4287 needs_entity = true;
4288 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4289 needs_entity = true;
4293 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4294 create_variable_entity(entity,
4295 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4298 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4299 entity->variable.v.value_number = next_value_number_function;
4300 set_irg_loc_description(current_ir_graph, next_value_number_function,
4302 ++next_value_number_function;
4306 static void create_local_static_variable(entity_t *entity)
4308 assert(entity->kind == ENTITY_VARIABLE);
4309 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4311 type_t *type = skip_typeref(entity->declaration.type);
4312 ir_type *const var_type = entity->variable.thread_local ?
4313 get_tls_type() : get_glob_type();
4314 ir_type *const irtype = get_ir_type(type);
4315 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4317 size_t l = strlen(entity->base.symbol->string);
4318 char buf[l + sizeof(".%u")];
4319 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4320 ident *const id = id_unique(buf);
4321 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4323 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4324 set_entity_volatility(irentity, volatility_is_volatile);
4327 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4328 entity->variable.v.entity = irentity;
4330 set_entity_ld_ident(irentity, id);
4331 set_entity_visibility(irentity, ir_visibility_local);
4333 if (entity->variable.initializer == NULL) {
4334 ir_initializer_t *null_init = get_initializer_null();
4335 set_entity_initializer(irentity, null_init);
4338 ir_graph *const old_current_ir_graph = current_ir_graph;
4339 current_ir_graph = get_const_code_irg();
4341 create_variable_initializer(entity);
4343 assert(current_ir_graph == get_const_code_irg());
4344 current_ir_graph = old_current_ir_graph;
4349 static ir_node *return_statement_to_firm(return_statement_t *statement)
4351 if (!currently_reachable())
4354 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4355 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4356 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4359 if (!is_type_void(type)) {
4360 ir_mode *const mode = get_ir_mode_storage(type);
4362 res = create_conv(dbgi, res, mode);
4363 res = do_strict_conv(dbgi, res);
4365 res = new_Unknown(mode);
4372 ir_node *const in[1] = { res };
4373 ir_node *const store = get_store();
4374 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4376 ir_node *end_block = get_irg_end_block(current_ir_graph);
4377 add_immBlock_pred(end_block, ret);
4379 set_unreachable_now();
4383 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4385 if (!currently_reachable())
4388 return expression_to_firm(statement->expression);
4391 static void create_local_declarations(entity_t*);
4393 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4395 create_local_declarations(compound->scope.entities);
4397 ir_node *result = NULL;
4398 statement_t *statement = compound->statements;
4399 for ( ; statement != NULL; statement = statement->base.next) {
4400 result = statement_to_firm(statement);
4406 static void create_global_variable(entity_t *entity)
4408 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4409 ir_visibility visibility = ir_visibility_external;
4410 storage_class_tag_t storage
4411 = (storage_class_tag_t)entity->declaration.storage_class;
4412 decl_modifiers_t modifiers = entity->declaration.modifiers;
4413 assert(entity->kind == ENTITY_VARIABLE);
4416 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4417 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4418 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4419 case STORAGE_CLASS_TYPEDEF:
4420 case STORAGE_CLASS_AUTO:
4421 case STORAGE_CLASS_REGISTER:
4422 panic("invalid storage class for global var");
4425 /* "common" symbols */
4426 if (storage == STORAGE_CLASS_NONE
4427 && entity->variable.initializer == NULL
4428 && !entity->variable.thread_local
4429 && (modifiers & DM_WEAK) == 0) {
4430 linkage |= IR_LINKAGE_MERGE;
4433 ir_type *var_type = get_glob_type();
4434 if (entity->variable.thread_local) {
4435 var_type = get_tls_type();
4437 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4438 ir_entity *irentity = entity->variable.v.entity;
4439 add_entity_linkage(irentity, linkage);
4440 set_entity_visibility(irentity, visibility);
4441 if (entity->variable.initializer == NULL
4442 && storage != STORAGE_CLASS_EXTERN) {
4443 ir_initializer_t *null_init = get_initializer_null();
4444 set_entity_initializer(irentity, null_init);
4448 static void create_local_declaration(entity_t *entity)
4450 assert(is_declaration(entity));
4452 /* construct type */
4453 (void) get_ir_type(entity->declaration.type);
4454 if (entity->base.symbol == NULL) {
4458 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4459 case STORAGE_CLASS_STATIC:
4460 if (entity->kind == ENTITY_FUNCTION) {
4461 (void)get_function_entity(entity, NULL);
4463 create_local_static_variable(entity);
4466 case STORAGE_CLASS_EXTERN:
4467 if (entity->kind == ENTITY_FUNCTION) {
4468 assert(entity->function.statement == NULL);
4469 (void)get_function_entity(entity, NULL);
4471 create_global_variable(entity);
4472 create_variable_initializer(entity);
4475 case STORAGE_CLASS_NONE:
4476 case STORAGE_CLASS_AUTO:
4477 case STORAGE_CLASS_REGISTER:
4478 if (entity->kind == ENTITY_FUNCTION) {
4479 if (entity->function.statement != NULL) {
4480 ir_type *owner = get_irg_frame_type(current_ir_graph);
4481 (void)get_function_entity(entity, owner);
4482 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4483 enqueue_inner_function(entity);
4485 (void)get_function_entity(entity, NULL);
4488 create_local_variable(entity);
4491 case STORAGE_CLASS_TYPEDEF:
4494 panic("invalid storage class found");
4497 static void create_local_declarations(entity_t *e)
4499 for (; e; e = e->base.next) {
4500 if (is_declaration(e))
4501 create_local_declaration(e);
4505 static void initialize_local_declaration(entity_t *entity)
4507 if (entity->base.symbol == NULL)
4510 // no need to emit code in dead blocks
4511 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4512 && !currently_reachable())
4515 switch ((declaration_kind_t) entity->declaration.kind) {
4516 case DECLARATION_KIND_LOCAL_VARIABLE:
4517 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4518 create_variable_initializer(entity);
4521 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4522 allocate_variable_length_array(entity);
4525 case DECLARATION_KIND_COMPOUND_MEMBER:
4526 case DECLARATION_KIND_GLOBAL_VARIABLE:
4527 case DECLARATION_KIND_FUNCTION:
4528 case DECLARATION_KIND_INNER_FUNCTION:
4531 case DECLARATION_KIND_PARAMETER:
4532 case DECLARATION_KIND_PARAMETER_ENTITY:
4533 panic("can't initialize parameters");
4535 case DECLARATION_KIND_UNKNOWN:
4536 panic("can't initialize unknown declaration");
4538 panic("invalid declaration kind");
4541 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4543 entity_t *entity = statement->declarations_begin;
4547 entity_t *const last = statement->declarations_end;
4548 for ( ;; entity = entity->base.next) {
4549 if (is_declaration(entity)) {
4550 initialize_local_declaration(entity);
4551 } else if (entity->kind == ENTITY_TYPEDEF) {
4552 /* ยง6.7.7:3 Any array size expressions associated with variable length
4553 * array declarators are evaluated each time the declaration of the
4554 * typedef name is reached in the order of execution. */
4555 type_t *const type = skip_typeref(entity->typedefe.type);
4556 if (is_type_array(type) && type->array.is_vla)
4557 get_vla_size(&type->array);
4566 static ir_node *if_statement_to_firm(if_statement_t *statement)
4568 create_local_declarations(statement->scope.entities);
4570 /* Create the condition. */
4571 ir_node *true_block = NULL;
4572 ir_node *false_block = NULL;
4573 if (currently_reachable()) {
4574 true_block = new_immBlock();
4575 false_block = new_immBlock();
4576 create_condition_evaluation(statement->condition, true_block, false_block);
4577 mature_immBlock(true_block);
4578 mature_immBlock(false_block);
4581 /* Create the true statement. */
4582 set_cur_block(true_block);
4583 statement_to_firm(statement->true_statement);
4584 ir_node *fallthrough_block = get_cur_block();
4586 /* Create the false statement. */
4587 set_cur_block(false_block);
4588 if (statement->false_statement != NULL) {
4589 statement_to_firm(statement->false_statement);
4592 /* Handle the block after the if-statement. Minor simplification and
4593 * optimisation: Reuse the false/true block as fallthrough block, if the
4594 * true/false statement does not pass control to the fallthrough block, e.g.
4595 * in the typical if (x) return; pattern. */
4596 if (fallthrough_block) {
4597 if (currently_reachable()) {
4598 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4599 ir_node *const f_jump = new_Jmp();
4600 ir_node *const in[] = { t_jump, f_jump };
4601 fallthrough_block = new_Block(2, in);
4603 set_cur_block(fallthrough_block);
4610 * Add an unconditional jump to the target block. If the source block is not
4611 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4612 * loops. This is necessary if the jump potentially enters a loop.
4614 static void jump_to(ir_node *const target_block)
4616 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4617 add_immBlock_pred(target_block, pred);
4621 * Add an unconditional jump to the target block, if the current block is
4622 * reachable and do nothing otherwise. This is only valid if the jump does not
4623 * enter a loop (a back edge is ok).
4625 static void jump_if_reachable(ir_node *const target_block)
4627 if (currently_reachable())
4628 add_immBlock_pred(target_block, new_Jmp());
4631 static ir_node *while_statement_to_firm(while_statement_t *statement)
4633 create_local_declarations(statement->scope.entities);
4635 /* Create the header block */
4636 ir_node *const header_block = new_immBlock();
4637 jump_to(header_block);
4639 /* Create the condition. */
4640 ir_node * body_block;
4641 ir_node * false_block;
4642 expression_t *const cond = statement->condition;
4643 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4644 fold_constant_to_bool(cond)) {
4645 /* Shortcut for while (true). */
4646 body_block = header_block;
4649 keep_alive(header_block);
4650 keep_all_memory(header_block);
4652 body_block = new_immBlock();
4653 false_block = new_immBlock();
4655 set_cur_block(header_block);
4656 create_condition_evaluation(cond, body_block, false_block);
4657 mature_immBlock(body_block);
4660 ir_node *const old_continue_label = continue_label;
4661 ir_node *const old_break_label = break_label;
4662 continue_label = header_block;
4663 break_label = false_block;
4665 /* Create the loop body. */
4666 set_cur_block(body_block);
4667 statement_to_firm(statement->body);
4668 jump_if_reachable(header_block);
4670 mature_immBlock(header_block);
4671 assert(false_block == NULL || false_block == break_label);
4672 false_block = break_label;
4673 if (false_block != NULL) {
4674 mature_immBlock(false_block);
4676 set_cur_block(false_block);
4678 assert(continue_label == header_block);
4679 continue_label = old_continue_label;
4680 break_label = old_break_label;
4684 static ir_node *get_break_label(void)
4686 if (break_label == NULL) {
4687 break_label = new_immBlock();
4692 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4694 create_local_declarations(statement->scope.entities);
4696 /* create the header block */
4697 ir_node *header_block = new_immBlock();
4700 ir_node *body_block = new_immBlock();
4701 jump_to(body_block);
4703 ir_node *old_continue_label = continue_label;
4704 ir_node *old_break_label = break_label;
4705 continue_label = header_block;
4708 set_cur_block(body_block);
4709 statement_to_firm(statement->body);
4710 ir_node *const false_block = get_break_label();
4712 assert(continue_label == header_block);
4713 continue_label = old_continue_label;
4714 break_label = old_break_label;
4716 jump_if_reachable(header_block);
4718 /* create the condition */
4719 mature_immBlock(header_block);
4720 set_cur_block(header_block);
4722 create_condition_evaluation(statement->condition, body_block, false_block);
4723 mature_immBlock(body_block);
4724 mature_immBlock(false_block);
4726 set_cur_block(false_block);
4730 static ir_node *for_statement_to_firm(for_statement_t *statement)
4732 create_local_declarations(statement->scope.entities);
4734 if (currently_reachable()) {
4735 entity_t *entity = statement->scope.entities;
4736 for ( ; entity != NULL; entity = entity->base.next) {
4737 if (!is_declaration(entity))
4740 initialize_local_declaration(entity);
4743 if (statement->initialisation != NULL) {
4744 expression_to_firm(statement->initialisation);
4748 /* Create the header block */
4749 ir_node *const header_block = new_immBlock();
4750 jump_to(header_block);
4752 /* Create the condition. */
4753 ir_node *body_block;
4754 ir_node *false_block;
4755 if (statement->condition != NULL) {
4756 body_block = new_immBlock();
4757 false_block = new_immBlock();
4759 set_cur_block(header_block);
4760 create_condition_evaluation(statement->condition, body_block, false_block);
4761 mature_immBlock(body_block);
4764 body_block = header_block;
4767 keep_alive(header_block);
4768 keep_all_memory(header_block);
4771 /* Create the step block, if necessary. */
4772 ir_node * step_block = header_block;
4773 expression_t *const step = statement->step;
4775 step_block = new_immBlock();
4778 ir_node *const old_continue_label = continue_label;
4779 ir_node *const old_break_label = break_label;
4780 continue_label = step_block;
4781 break_label = false_block;
4783 /* Create the loop body. */
4784 set_cur_block(body_block);
4785 statement_to_firm(statement->body);
4786 jump_if_reachable(step_block);
4788 /* Create the step code. */
4790 mature_immBlock(step_block);
4791 set_cur_block(step_block);
4792 expression_to_firm(step);
4793 jump_if_reachable(header_block);
4796 mature_immBlock(header_block);
4797 assert(false_block == NULL || false_block == break_label);
4798 false_block = break_label;
4799 if (false_block != NULL) {
4800 mature_immBlock(false_block);
4802 set_cur_block(false_block);
4804 assert(continue_label == step_block);
4805 continue_label = old_continue_label;
4806 break_label = old_break_label;
4810 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4812 if (!currently_reachable())
4815 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4816 ir_node *jump = new_d_Jmp(dbgi);
4817 add_immBlock_pred(target_block, jump);
4819 set_unreachable_now();
4823 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4825 /* determine number of cases */
4827 for (case_label_statement_t *l = statement->first_case; l != NULL;
4830 if (l->expression == NULL)
4832 if (l->is_empty_range)
4837 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4839 for (case_label_statement_t *l = statement->first_case; l != NULL;
4841 if (l->expression == NULL) {
4842 l->pn = pn_Switch_default;
4845 if (l->is_empty_range)
4847 ir_tarval *min = fold_constant_to_tarval(l->expression);
4848 ir_tarval *max = min;
4849 long pn = (long) i+1;
4850 if (l->end_range != NULL)
4851 max = fold_constant_to_tarval(l->end_range);
4852 ir_switch_table_set(res, i++, min, max, pn);
4858 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4860 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4861 ir_node *switch_node = NULL;
4863 if (currently_reachable()) {
4864 ir_node *expression = expression_to_firm(statement->expression);
4865 ir_switch_table *table = create_switch_table(statement);
4866 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4868 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4871 set_unreachable_now();
4873 ir_node *const old_switch = current_switch;
4874 ir_node *const old_break_label = break_label;
4875 const bool old_saw_default_label = saw_default_label;
4876 saw_default_label = false;
4877 current_switch = switch_node;
4880 statement_to_firm(statement->body);
4882 if (currently_reachable()) {
4883 add_immBlock_pred(get_break_label(), new_Jmp());
4886 if (!saw_default_label && switch_node) {
4887 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4888 add_immBlock_pred(get_break_label(), proj);
4891 if (break_label != NULL) {
4892 mature_immBlock(break_label);
4894 set_cur_block(break_label);
4896 assert(current_switch == switch_node);
4897 current_switch = old_switch;
4898 break_label = old_break_label;
4899 saw_default_label = old_saw_default_label;
4903 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4905 if (statement->is_empty_range)
4908 if (current_switch != NULL) {
4909 ir_node *block = new_immBlock();
4910 /* Fallthrough from previous case */
4911 jump_if_reachable(block);
4913 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4914 add_immBlock_pred(block, proj);
4915 if (statement->expression == NULL)
4916 saw_default_label = true;
4918 mature_immBlock(block);
4919 set_cur_block(block);
4922 return statement_to_firm(statement->statement);
4925 static ir_node *label_to_firm(const label_statement_t *statement)
4927 ir_node *block = get_label_block(statement->label);
4930 set_cur_block(block);
4932 keep_all_memory(block);
4934 return statement_to_firm(statement->statement);
4937 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4939 if (!currently_reachable())
4942 ir_node *const irn = expression_to_firm(statement->expression);
4943 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4944 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
4946 set_irn_link(ijmp, ijmp_list);
4949 set_unreachable_now();
4953 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4955 bool needs_memory = false;
4957 if (statement->is_volatile) {
4958 needs_memory = true;
4961 size_t n_clobbers = 0;
4962 asm_clobber_t *clobber = statement->clobbers;
4963 for ( ; clobber != NULL; clobber = clobber->next) {
4964 const char *clobber_str = clobber->clobber.begin;
4966 if (!be_is_valid_clobber(clobber_str)) {
4967 errorf(&statement->base.source_position,
4968 "invalid clobber '%s' specified", clobber->clobber);
4972 if (streq(clobber_str, "memory")) {
4973 needs_memory = true;
4977 ident *id = new_id_from_str(clobber_str);
4978 obstack_ptr_grow(&asm_obst, id);
4981 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4982 ident **clobbers = NULL;
4983 if (n_clobbers > 0) {
4984 clobbers = obstack_finish(&asm_obst);
4987 size_t n_inputs = 0;
4988 asm_argument_t *argument = statement->inputs;
4989 for ( ; argument != NULL; argument = argument->next)
4991 size_t n_outputs = 0;
4992 argument = statement->outputs;
4993 for ( ; argument != NULL; argument = argument->next)
4996 unsigned next_pos = 0;
4998 ir_node *ins[n_inputs + n_outputs + 1];
5001 ir_asm_constraint tmp_in_constraints[n_outputs];
5003 const expression_t *out_exprs[n_outputs];
5004 ir_node *out_addrs[n_outputs];
5005 size_t out_size = 0;
5007 argument = statement->outputs;
5008 for ( ; argument != NULL; argument = argument->next) {
5009 const char *constraints = argument->constraints.begin;
5010 asm_constraint_flags_t asm_flags
5011 = be_parse_asm_constraints(constraints);
5014 source_position_t const *const pos = &statement->base.source_position;
5015 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5016 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5018 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5019 errorf(pos, "some constraints in '%s' are invalid", constraints);
5022 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5023 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5028 unsigned pos = next_pos++;
5029 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5030 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5031 expression_t *expr = argument->expression;
5032 ir_node *addr = expression_to_addr(expr);
5033 /* in+output, construct an artifical same_as constraint on the
5035 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5037 ir_node *value = get_value_from_lvalue(expr, addr);
5039 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5041 ir_asm_constraint constraint;
5042 constraint.pos = pos;
5043 constraint.constraint = new_id_from_str(buf);
5044 constraint.mode = get_ir_mode_storage(expr->base.type);
5045 tmp_in_constraints[in_size] = constraint;
5046 ins[in_size] = value;
5051 out_exprs[out_size] = expr;
5052 out_addrs[out_size] = addr;
5054 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5055 /* pure memory ops need no input (but we have to make sure we
5056 * attach to the memory) */
5057 assert(! (asm_flags &
5058 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5059 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5060 needs_memory = true;
5062 /* we need to attach the address to the inputs */
5063 expression_t *expr = argument->expression;
5065 ir_asm_constraint constraint;
5066 constraint.pos = pos;
5067 constraint.constraint = new_id_from_str(constraints);
5068 constraint.mode = mode_M;
5069 tmp_in_constraints[in_size] = constraint;
5071 ins[in_size] = expression_to_addr(expr);
5075 errorf(&statement->base.source_position,
5076 "only modifiers but no place set in constraints '%s'",
5081 ir_asm_constraint constraint;
5082 constraint.pos = pos;
5083 constraint.constraint = new_id_from_str(constraints);
5084 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5086 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5088 assert(obstack_object_size(&asm_obst)
5089 == out_size * sizeof(ir_asm_constraint));
5090 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5093 obstack_grow(&asm_obst, tmp_in_constraints,
5094 in_size * sizeof(tmp_in_constraints[0]));
5095 /* find and count input and output arguments */
5096 argument = statement->inputs;
5097 for ( ; argument != NULL; argument = argument->next) {
5098 const char *constraints = argument->constraints.begin;
5099 asm_constraint_flags_t asm_flags
5100 = be_parse_asm_constraints(constraints);
5102 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5103 errorf(&statement->base.source_position,
5104 "some constraints in '%s' are not supported", constraints);
5107 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5108 errorf(&statement->base.source_position,
5109 "some constraints in '%s' are invalid", constraints);
5112 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5113 errorf(&statement->base.source_position,
5114 "write flag specified for input constraints '%s'",
5120 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5121 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5122 /* we can treat this as "normal" input */
5123 input = expression_to_firm(argument->expression);
5124 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5125 /* pure memory ops need no input (but we have to make sure we
5126 * attach to the memory) */
5127 assert(! (asm_flags &
5128 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5129 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5130 needs_memory = true;
5131 input = expression_to_addr(argument->expression);
5133 errorf(&statement->base.source_position,
5134 "only modifiers but no place set in constraints '%s'",
5139 ir_asm_constraint constraint;
5140 constraint.pos = next_pos++;
5141 constraint.constraint = new_id_from_str(constraints);
5142 constraint.mode = get_irn_mode(input);
5144 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5145 ins[in_size++] = input;
5149 ir_asm_constraint constraint;
5150 constraint.pos = next_pos++;
5151 constraint.constraint = new_id_from_str("");
5152 constraint.mode = mode_M;
5154 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5155 ins[in_size++] = get_store();
5158 assert(obstack_object_size(&asm_obst)
5159 == in_size * sizeof(ir_asm_constraint));
5160 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5162 /* create asm node */
5163 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5165 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5167 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5168 out_size, output_constraints,
5169 n_clobbers, clobbers, asm_text);
5171 if (statement->is_volatile) {
5172 set_irn_pinned(node, op_pin_state_pinned);
5174 set_irn_pinned(node, op_pin_state_floats);
5177 /* create output projs & connect them */
5179 ir_node *projm = new_Proj(node, mode_M, out_size);
5184 for (i = 0; i < out_size; ++i) {
5185 const expression_t *out_expr = out_exprs[i];
5187 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5188 ir_node *proj = new_Proj(node, mode, pn);
5189 ir_node *addr = out_addrs[i];
5191 set_value_for_expression_addr(out_expr, proj, addr);
5197 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5199 statement_to_firm(statement->try_statement);
5200 source_position_t const *const pos = &statement->base.source_position;
5201 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5205 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5207 errorf(&statement->base.source_position, "__leave not supported yet");
5212 * Transform a statement.
5214 static ir_node *statement_to_firm(statement_t *const stmt)
5217 assert(!stmt->base.transformed);
5218 stmt->base.transformed = true;
5221 switch (stmt->kind) {
5222 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5223 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5224 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5225 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5226 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5227 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5228 case STATEMENT_EMPTY: return NULL; /* nothing */
5229 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5230 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5231 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5232 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5233 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5234 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5235 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5236 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5237 case STATEMENT_WHILE: return while_statement_to_firm( &stmt->whiles);
5239 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5240 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5241 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5243 case STATEMENT_ERROR: panic("error statement found");
5245 panic("statement not implemented");
5248 static int count_local_variables(const entity_t *entity,
5249 const entity_t *const last)
5252 entity_t const *const end = last != NULL ? last->base.next : NULL;
5253 for (; entity != end; entity = entity->base.next) {
5254 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5255 !entity->variable.address_taken &&
5256 is_type_scalar(skip_typeref(entity->declaration.type)))
5262 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5264 int *const count = env;
5266 switch (stmt->kind) {
5267 case STATEMENT_DECLARATION: {
5268 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5269 *count += count_local_variables(decl_stmt->declarations_begin,
5270 decl_stmt->declarations_end);
5275 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5284 * Return the number of local (alias free) variables used by a function.
5286 static int get_function_n_local_vars(entity_t *entity)
5288 const function_t *function = &entity->function;
5291 /* count parameters */
5292 count += count_local_variables(function->parameters.entities, NULL);
5294 /* count local variables declared in body */
5295 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5300 * Build Firm code for the parameters of a function.
5302 static void initialize_function_parameters(entity_t *entity)
5304 assert(entity->kind == ENTITY_FUNCTION);
5305 ir_graph *irg = current_ir_graph;
5306 ir_node *args = get_irg_args(irg);
5308 ir_type *function_irtype;
5310 if (entity->function.need_closure) {
5311 /* add an extra parameter for the static link */
5312 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5315 /* Matze: IMO this is wrong, nested functions should have an own
5316 * type and not rely on strange parameters... */
5317 function_irtype = create_method_type(&entity->declaration.type->function, true);
5319 function_irtype = get_ir_type(entity->declaration.type);
5324 entity_t *parameter = entity->function.parameters.entities;
5325 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5326 if (parameter->kind != ENTITY_PARAMETER)
5329 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5330 type_t *type = skip_typeref(parameter->declaration.type);
5332 assert(!is_type_array(type));
5333 bool const needs_entity = parameter->variable.address_taken || is_type_compound(type);
5335 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5337 ir_type *frame_type = get_irg_frame_type(irg);
5339 = new_parameter_entity(frame_type, n, param_irtype);
5340 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5341 parameter->variable.v.entity = param;
5345 ir_mode *param_mode = get_type_mode(param_irtype);
5347 ir_node *value = new_r_Proj(args, param_mode, pn);
5349 ir_mode *mode = get_ir_mode_storage(type);
5350 value = create_conv(NULL, value, mode);
5351 value = do_strict_conv(NULL, value);
5353 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5354 parameter->variable.v.value_number = next_value_number_function;
5355 set_irg_loc_description(current_ir_graph, next_value_number_function,
5357 ++next_value_number_function;
5359 set_value(parameter->variable.v.value_number, value);
5364 * Handle additional decl modifiers for IR-graphs
5366 * @param irg the IR-graph
5367 * @param dec_modifiers additional modifiers
5369 static void handle_decl_modifier_irg(ir_graph *irg,
5370 decl_modifiers_t decl_modifiers)
5372 if (decl_modifiers & DM_NAKED) {
5373 /* TRUE if the declaration includes the Microsoft
5374 __declspec(naked) specifier. */
5375 add_irg_additional_properties(irg, mtp_property_naked);
5377 if (decl_modifiers & DM_FORCEINLINE) {
5378 /* TRUE if the declaration includes the
5379 Microsoft __forceinline specifier. */
5380 set_irg_inline_property(irg, irg_inline_forced);
5382 if (decl_modifiers & DM_NOINLINE) {
5383 /* TRUE if the declaration includes the Microsoft
5384 __declspec(noinline) specifier. */
5385 set_irg_inline_property(irg, irg_inline_forbidden);
5389 static void add_function_pointer(ir_type *segment, ir_entity *method,
5390 const char *unique_template)
5392 ir_type *method_type = get_entity_type(method);
5393 ir_type *ptr_type = new_type_pointer(method_type);
5395 /* these entities don't really have a name but firm only allows
5397 * Note that we mustn't give these entities a name since for example
5398 * Mach-O doesn't allow them. */
5399 ident *ide = id_unique(unique_template);
5400 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5401 ir_graph *irg = get_const_code_irg();
5402 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5405 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5406 set_entity_compiler_generated(ptr, 1);
5407 set_entity_visibility(ptr, ir_visibility_private);
5408 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5409 set_atomic_ent_value(ptr, val);
5413 * Generate possible IJmp branches to a given label block.
5415 static void gen_ijmp_branches(ir_node *block)
5418 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5419 add_immBlock_pred(block, ijmp);
5424 * Create code for a function and all inner functions.
5426 * @param entity the function entity
5428 static void create_function(entity_t *entity)
5430 assert(entity->kind == ENTITY_FUNCTION);
5431 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5433 if (entity->function.statement == NULL)
5436 inner_functions = NULL;
5437 current_trampolines = NULL;
5439 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5440 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5441 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5443 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5444 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5445 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5448 current_function_entity = entity;
5449 current_function_name = NULL;
5450 current_funcsig = NULL;
5452 assert(all_labels == NULL);
5453 all_labels = NEW_ARR_F(label_t *, 0);
5456 int n_local_vars = get_function_n_local_vars(entity);
5457 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5458 current_ir_graph = irg;
5460 ir_graph *old_current_function = current_function;
5461 current_function = irg;
5463 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5464 current_vararg_entity = NULL;
5466 set_irg_fp_model(irg, firm_fp_model);
5467 tarval_enable_fp_ops(1);
5468 set_irn_dbg_info(get_irg_start_block(irg),
5469 get_entity_dbg_info(function_entity));
5471 /* set inline flags */
5472 if (entity->function.is_inline)
5473 set_irg_inline_property(irg, irg_inline_recomended);
5474 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5476 next_value_number_function = 0;
5477 initialize_function_parameters(entity);
5478 current_static_link = entity->function.static_link;
5480 statement_to_firm(entity->function.statement);
5482 ir_node *end_block = get_irg_end_block(irg);
5484 /* do we have a return statement yet? */
5485 if (currently_reachable()) {
5486 type_t *type = skip_typeref(entity->declaration.type);
5487 assert(is_type_function(type));
5488 type_t *const return_type = skip_typeref(type->function.return_type);
5491 if (is_type_void(return_type)) {
5492 ret = new_Return(get_store(), 0, NULL);
5494 ir_mode *const mode = get_ir_mode_storage(return_type);
5497 /* ยง5.1.2.2.3 main implicitly returns 0 */
5498 if (is_main(entity)) {
5499 in[0] = new_Const(get_mode_null(mode));
5501 in[0] = new_Unknown(mode);
5503 ret = new_Return(get_store(), 1, in);
5505 add_immBlock_pred(end_block, ret);
5508 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5509 label_t *label = all_labels[i];
5510 if (label->address_taken) {
5511 gen_ijmp_branches(label->block);
5513 mature_immBlock(label->block);
5516 DEL_ARR_F(all_labels);
5519 irg_finalize_cons(irg);
5521 /* finalize the frame type */
5522 ir_type *frame_type = get_irg_frame_type(irg);
5523 int n = get_compound_n_members(frame_type);
5526 for (int i = 0; i < n; ++i) {
5527 ir_entity *member = get_compound_member(frame_type, i);
5528 ir_type *entity_type = get_entity_type(member);
5530 int align = get_type_alignment_bytes(entity_type);
5531 if (align > align_all)
5535 misalign = offset % align;
5537 offset += align - misalign;
5541 set_entity_offset(member, offset);
5542 offset += get_type_size_bytes(entity_type);
5544 set_type_size_bytes(frame_type, offset);
5545 set_type_alignment_bytes(frame_type, align_all);
5547 irg_verify(irg, VERIFY_ENFORCE_SSA);
5548 current_vararg_entity = old_current_vararg_entity;
5549 current_function = old_current_function;
5551 if (current_trampolines != NULL) {
5552 DEL_ARR_F(current_trampolines);
5553 current_trampolines = NULL;
5556 /* create inner functions if any */
5557 entity_t **inner = inner_functions;
5558 if (inner != NULL) {
5559 ir_type *rem_outer_frame = current_outer_frame;
5560 current_outer_frame = get_irg_frame_type(current_ir_graph);
5561 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5562 create_function(inner[i]);
5566 current_outer_frame = rem_outer_frame;
5570 static void scope_to_firm(scope_t *scope)
5572 /* first pass: create declarations */
5573 entity_t *entity = scope->entities;
5574 for ( ; entity != NULL; entity = entity->base.next) {
5575 if (entity->base.symbol == NULL)
5578 if (entity->kind == ENTITY_FUNCTION) {
5579 if (entity->function.btk != BUILTIN_NONE) {
5580 /* builtins have no representation */
5583 (void)get_function_entity(entity, NULL);
5584 } else if (entity->kind == ENTITY_VARIABLE) {
5585 create_global_variable(entity);
5586 } else if (entity->kind == ENTITY_NAMESPACE) {
5587 scope_to_firm(&entity->namespacee.members);
5591 /* second pass: create code/initializers */
5592 entity = scope->entities;
5593 for ( ; entity != NULL; entity = entity->base.next) {
5594 if (entity->base.symbol == NULL)
5597 if (entity->kind == ENTITY_FUNCTION) {
5598 if (entity->function.btk != BUILTIN_NONE) {
5599 /* builtins have no representation */
5602 create_function(entity);
5603 } else if (entity->kind == ENTITY_VARIABLE) {
5604 assert(entity->declaration.kind
5605 == DECLARATION_KIND_GLOBAL_VARIABLE);
5606 current_ir_graph = get_const_code_irg();
5607 create_variable_initializer(entity);
5612 void init_ast2firm(void)
5614 obstack_init(&asm_obst);
5615 init_atomic_modes();
5617 ir_set_debug_retrieve(dbg_retrieve);
5618 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5620 /* create idents for all known runtime functions */
5621 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5622 rts_idents[i] = new_id_from_str(rts_data[i].name);
5625 entitymap_init(&entitymap);
5628 static void init_ir_types(void)
5630 static int ir_types_initialized = 0;
5631 if (ir_types_initialized)
5633 ir_types_initialized = 1;
5635 ir_type_char = get_ir_type(type_char);
5636 ir_type_const_char = get_ir_type(type_const_char);
5637 ir_type_wchar_t = get_ir_type(type_wchar_t);
5639 be_params = be_get_backend_param();
5640 mode_float_arithmetic = be_params->mode_float_arithmetic;
5642 stack_param_align = be_params->stack_param_align;
5645 void exit_ast2firm(void)
5647 entitymap_destroy(&entitymap);
5648 obstack_free(&asm_obst, NULL);
5651 static void global_asm_to_firm(statement_t *s)
5653 for (; s != NULL; s = s->base.next) {
5654 assert(s->kind == STATEMENT_ASM);
5656 char const *const text = s->asms.asm_text.begin;
5657 size_t size = s->asms.asm_text.size;
5659 /* skip the last \0 */
5660 if (text[size - 1] == '\0')
5663 ident *const id = new_id_from_chars(text, size);
5668 static const char *get_cwd(void)
5670 static char buf[1024];
5672 getcwd(buf, sizeof(buf));
5676 void translation_unit_to_firm(translation_unit_t *unit)
5678 if (c_mode & _CXX) {
5679 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5680 } else if (c_mode & _C99) {
5681 be_dwarf_set_source_language(DW_LANG_C99);
5682 } else if (c_mode & _C89) {
5683 be_dwarf_set_source_language(DW_LANG_C89);
5685 be_dwarf_set_source_language(DW_LANG_C);
5687 be_dwarf_set_compilation_directory(get_cwd());
5689 /* initialize firm arithmetic */
5690 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5691 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5693 /* just to be sure */
5694 continue_label = NULL;
5696 current_switch = NULL;
5697 current_translation_unit = unit;
5701 scope_to_firm(&unit->scope);
5702 global_asm_to_firm(unit->global_asm);
5704 current_ir_graph = NULL;
5705 current_translation_unit = NULL;