2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
44 #include "diagnostic.h"
45 #include "lang_features.h"
47 #include "type_hash.h"
52 #include "entitymap_t.h"
53 #include "driver/firm_opt.h"
55 typedef struct trampoline_region trampoline_region;
56 struct trampoline_region {
57 ir_entity *function; /**< The function that is called by this trampoline */
58 ir_entity *region; /**< created region for the trampoline */
61 fp_model_t firm_fp_model = fp_model_precise;
63 static const backend_params *be_params;
65 static ir_type *ir_type_char;
66 static ir_type *ir_type_wchar_t;
68 /* architecture specific floating point arithmetic mode (if any) */
69 static ir_mode *mode_float_arithmetic;
71 /* alignment of stack parameters */
72 static unsigned stack_param_align;
74 static int next_value_number_function;
75 static ir_node *continue_label;
76 static ir_node *break_label;
77 static ir_node *current_switch;
78 static bool saw_default_label;
79 static label_t **all_labels;
80 static entity_t **inner_functions;
81 static ir_node *ijmp_list;
82 static bool constant_folding;
84 static const entity_t *current_function_entity;
85 static ir_node *current_function_name;
86 static ir_node *current_funcsig;
87 static ir_graph *current_function;
88 static translation_unit_t *current_translation_unit;
89 static trampoline_region *current_trampolines;
90 static ir_type *current_outer_frame;
91 static ir_node *current_static_link;
92 static ir_entity *current_vararg_entity;
94 static entitymap_t entitymap;
96 static struct obstack asm_obst;
98 typedef enum declaration_kind_t {
99 DECLARATION_KIND_UNKNOWN,
100 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
101 DECLARATION_KIND_GLOBAL_VARIABLE,
102 DECLARATION_KIND_LOCAL_VARIABLE,
103 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
104 DECLARATION_KIND_PARAMETER,
105 DECLARATION_KIND_PARAMETER_ENTITY,
106 DECLARATION_KIND_FUNCTION,
107 DECLARATION_KIND_COMPOUND_MEMBER,
108 DECLARATION_KIND_INNER_FUNCTION
109 } declaration_kind_t;
111 static ir_type *get_ir_type_incomplete(type_t *type);
113 static void enqueue_inner_function(entity_t *entity)
115 if (inner_functions == NULL)
116 inner_functions = NEW_ARR_F(entity_t *, 0);
117 ARR_APP1(entity_t*, inner_functions, entity);
120 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
122 const entity_t *entity = get_irg_loc_description(irg, pos);
124 if (entity != NULL) {
125 source_position_t const *const pos = &entity->base.source_position;
126 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
128 return new_r_Unknown(irg, mode);
131 static src_loc_t dbg_retrieve(const dbg_info *dbg)
133 source_position_t const *const pos = (source_position_t const*)dbg;
135 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
137 return (src_loc_t){ NULL, 0, 0 };
141 static dbg_info *get_dbg_info(const source_position_t *pos)
143 return (dbg_info*) pos;
146 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
147 const type_dbg_info *dbg)
150 print_to_buffer(buffer, buffer_size);
151 const type_t *type = (const type_t*) dbg;
153 finish_print_to_buffer();
156 static type_dbg_info *get_type_dbg_info_(const type_t *type)
158 return (type_dbg_info*) type;
161 /* is the current block a reachable one? */
162 static bool currently_reachable(void)
164 ir_node *const block = get_cur_block();
165 return block != NULL && !is_Bad(block);
168 static void set_unreachable_now(void)
173 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
175 static ir_node *_expression_to_firm(const expression_t *expression);
176 static ir_node *expression_to_firm(const expression_t *expression);
178 static unsigned decide_modulo_shift(unsigned type_size)
180 if (architecture_modulo_shift == 0)
182 if (type_size < architecture_modulo_shift)
183 return architecture_modulo_shift;
187 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
189 unsigned flags = get_atomic_type_flags(kind);
190 unsigned size = get_atomic_type_size(kind);
191 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
192 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
195 } else if (size == 8) {
198 panic("unexpected kind");
200 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
202 unsigned bit_size = size * 8;
203 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
204 unsigned modulo_shift = decide_modulo_shift(bit_size);
206 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
207 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
215 * Initialises the atomic modes depending on the machine size.
217 static void init_atomic_modes(void)
219 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
220 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
221 if (atomic_modes[i] != NULL)
223 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
227 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
229 assert(kind <= ATOMIC_TYPE_LAST);
230 return atomic_modes[kind];
233 static ir_node *get_vla_size(array_type_t *const type)
235 ir_node *size_node = type->size_node;
236 if (size_node == NULL) {
237 size_node = expression_to_firm(type->size_expression);
238 type->size_node = size_node;
243 static unsigned count_parameters(const function_type_t *function_type)
247 function_parameter_t *parameter = function_type->parameters;
248 for ( ; parameter != NULL; parameter = parameter->next) {
256 * Creates a Firm type for an atomic type
258 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
260 ir_mode *mode = atomic_modes[akind];
261 type_dbg_info *dbgi = get_type_dbg_info_(type);
262 ir_type *irtype = new_d_type_primitive(mode, dbgi);
263 il_alignment_t alignment = get_atomic_type_alignment(akind);
265 set_type_size_bytes(irtype, get_atomic_type_size(akind));
266 set_type_alignment_bytes(irtype, alignment);
272 * Creates a Firm type for a complex type
274 static ir_type *create_complex_type(const atomic_type_t *type)
276 atomic_type_kind_t kind = type->akind;
277 ir_mode *mode = atomic_modes[kind];
278 ident *id = get_mode_ident(mode);
282 /* FIXME: finish the array */
287 * Creates a Firm type for an imaginary type
289 static ir_type *create_imaginary_type(const atomic_type_t *type)
291 return create_atomic_type(type->akind, (const type_t*)type);
295 * return type of a parameter (and take transparent union gnu extension into
298 static type_t *get_parameter_type(type_t *orig_type)
300 type_t *type = skip_typeref(orig_type);
301 if (is_type_union(type)
302 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
303 compound_t *compound = type->compound.compound;
304 type = compound->members.entities->declaration.type;
310 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
312 type_t *return_type = skip_typeref(function_type->return_type);
314 int n_parameters = count_parameters(function_type)
315 + (for_closure ? 1 : 0);
316 int n_results = is_type_void(return_type) ? 0 : 1;
317 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
318 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
320 if (!is_type_void(return_type)) {
321 ir_type *restype = get_ir_type(return_type);
322 set_method_res_type(irtype, 0, restype);
325 function_parameter_t *parameter = function_type->parameters;
328 ir_type *p_irtype = get_ir_type(type_void_ptr);
329 set_method_param_type(irtype, n, p_irtype);
332 for ( ; parameter != NULL; parameter = parameter->next) {
333 type_t *type = get_parameter_type(parameter->type);
334 ir_type *p_irtype = get_ir_type(type);
335 set_method_param_type(irtype, n, p_irtype);
339 bool is_variadic = function_type->variadic;
342 set_method_variadicity(irtype, variadicity_variadic);
344 unsigned cc = get_method_calling_convention(irtype);
345 switch (function_type->calling_convention) {
346 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
349 set_method_calling_convention(irtype, SET_CDECL(cc));
356 /* only non-variadic function can use stdcall, else use cdecl */
357 set_method_calling_convention(irtype, SET_STDCALL(cc));
363 /* only non-variadic function can use fastcall, else use cdecl */
364 set_method_calling_convention(irtype, SET_FASTCALL(cc));
368 /* Hmm, leave default, not accepted by the parser yet. */
373 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
375 const decl_modifiers_t modifiers = function_type->modifiers;
376 if (modifiers & DM_CONST)
377 add_method_additional_properties(irtype, mtp_property_const);
378 if (modifiers & DM_PURE)
379 add_method_additional_properties(irtype, mtp_property_pure);
380 if (modifiers & DM_RETURNS_TWICE)
381 add_method_additional_properties(irtype, mtp_property_returns_twice);
382 if (modifiers & DM_NORETURN)
383 add_method_additional_properties(irtype, mtp_property_noreturn);
384 if (modifiers & DM_NOTHROW)
385 add_method_additional_properties(irtype, mtp_property_nothrow);
386 if (modifiers & DM_MALLOC)
387 add_method_additional_properties(irtype, mtp_property_malloc);
392 static ir_type *create_pointer_type(pointer_type_t *type)
394 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
395 type_t *points_to = type->points_to;
396 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
397 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
402 static ir_type *create_reference_type(reference_type_t *type)
404 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
405 type_t *refers_to = type->refers_to;
406 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
407 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
412 static ir_type *create_array_type(array_type_t *type)
414 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
415 type_t *element_type = type->element_type;
416 ir_type *ir_element_type = get_ir_type(element_type);
417 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
419 const int align = get_type_alignment_bytes(ir_element_type);
420 set_type_alignment_bytes(irtype, align);
422 if (type->size_constant) {
423 int n_elements = type->size;
425 set_array_bounds_int(irtype, 0, 0, n_elements);
427 size_t elemsize = get_type_size_bytes(ir_element_type);
428 if (elemsize % align > 0) {
429 elemsize += align - (elemsize % align);
431 set_type_size_bytes(irtype, n_elements * elemsize);
433 set_array_lower_bound_int(irtype, 0, 0);
435 set_type_state(irtype, layout_fixed);
441 * Return the signed integer type of size bits.
443 * @param size the size
445 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
449 static ir_mode *s_modes[64 + 1] = {NULL, };
453 if (size <= 0 || size > 64)
456 mode = s_modes[size];
460 snprintf(name, sizeof(name), "bf_I%u", size);
461 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
462 s_modes[size] = mode;
465 type_dbg_info *dbgi = get_type_dbg_info_(type);
466 res = new_d_type_primitive(mode, dbgi);
467 set_primitive_base_type(res, base_tp);
473 * Return the unsigned integer type of size bits.
475 * @param size the size
477 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
481 static ir_mode *u_modes[64 + 1] = {NULL, };
485 if (size <= 0 || size > 64)
488 mode = u_modes[size];
492 snprintf(name, sizeof(name), "bf_U%u", size);
493 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
494 u_modes[size] = mode;
497 type_dbg_info *dbgi = get_type_dbg_info_(type);
498 res = new_d_type_primitive(mode, dbgi);
499 set_primitive_base_type(res, base_tp);
504 static ir_type *create_bitfield_type(const entity_t *entity)
506 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
507 type_t *base = skip_typeref(entity->declaration.type);
508 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
509 ir_type *irbase = get_ir_type(base);
511 unsigned bit_size = entity->compound_member.bit_size;
513 assert(!is_type_float(base));
514 if (is_type_signed(base)) {
515 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
517 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
522 * Construct firm type from ast struct type.
524 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
526 compound_t *compound = type->compound;
528 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
529 return compound->irtype;
532 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
534 symbol_t *type_symbol = compound->base.symbol;
536 if (type_symbol != NULL) {
537 id = new_id_from_str(type_symbol->string);
540 id = id_unique("__anonymous_union.%u");
542 id = id_unique("__anonymous_struct.%u");
548 irtype = new_type_union(id);
550 irtype = new_type_struct(id);
553 compound->irtype_complete = false;
554 compound->irtype = irtype;
560 layout_union_type(type);
562 layout_struct_type(type);
565 compound->irtype_complete = true;
567 entity_t *entry = compound->members.entities;
568 for ( ; entry != NULL; entry = entry->base.next) {
569 if (entry->kind != ENTITY_COMPOUND_MEMBER)
572 symbol_t *symbol = entry->base.symbol;
573 type_t *entry_type = entry->declaration.type;
575 if (symbol == NULL) {
576 /* anonymous bitfield member, skip */
577 if (entry->compound_member.bitfield)
579 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
580 || entry_type->kind == TYPE_COMPOUND_UNION);
581 ident = id_unique("anon.%u");
583 ident = new_id_from_str(symbol->string);
586 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
588 ir_type *entry_irtype;
589 if (entry->compound_member.bitfield) {
590 entry_irtype = create_bitfield_type(entry);
592 entry_irtype = get_ir_type(entry_type);
594 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
596 set_entity_offset(entity, entry->compound_member.offset);
597 set_entity_offset_bits_remainder(entity,
598 entry->compound_member.bit_offset);
600 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
601 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
602 entry->compound_member.entity = entity;
605 set_type_alignment_bytes(irtype, compound->alignment);
606 set_type_size_bytes(irtype, compound->size);
607 set_type_state(irtype, layout_fixed);
612 static ir_tarval *fold_constant_to_tarval(expression_t const *);
614 static void determine_enum_values(enum_type_t *const type)
616 ir_mode *const mode = atomic_modes[type->base.akind];
617 ir_tarval *const one = get_mode_one(mode);
618 ir_tarval * tv_next = get_mode_null(mode);
620 enum_t *enume = type->enume;
621 entity_t *entry = enume->base.next;
622 for (; entry != NULL; entry = entry->base.next) {
623 if (entry->kind != ENTITY_ENUM_VALUE)
626 expression_t *const init = entry->enum_value.value;
628 tv_next = fold_constant_to_tarval(init);
630 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
631 entry->enum_value.tv = tv_next;
632 tv_next = tarval_add(tv_next, one);
636 static ir_type *create_enum_type(enum_type_t *const type)
638 return create_atomic_type(type->base.akind, (const type_t*) type);
641 static ir_type *get_ir_type_incomplete(type_t *type)
643 assert(type != NULL);
644 type = skip_typeref(type);
646 if (type->base.firm_type != NULL) {
647 return type->base.firm_type;
650 if (is_type_compound(type)) {
651 return create_compound_type(&type->compound, true);
653 return get_ir_type(type);
657 ir_type *get_ir_type(type_t *type)
659 assert(type != NULL);
661 type = skip_typeref(type);
663 if (type->base.firm_type != NULL) {
664 return type->base.firm_type;
667 ir_type *firm_type = NULL;
668 switch (type->kind) {
670 firm_type = create_atomic_type(type->atomic.akind, type);
673 firm_type = create_complex_type(&type->atomic);
676 firm_type = create_imaginary_type(&type->atomic);
679 firm_type = create_method_type(&type->function, false);
682 firm_type = create_pointer_type(&type->pointer);
685 firm_type = create_reference_type(&type->reference);
688 firm_type = create_array_type(&type->array);
690 case TYPE_COMPOUND_STRUCT:
691 case TYPE_COMPOUND_UNION:
692 firm_type = create_compound_type(&type->compound, false);
695 firm_type = create_enum_type(&type->enumt);
703 if (firm_type == NULL)
704 panic("unknown type found");
706 type->base.firm_type = firm_type;
710 static ir_mode *get_ir_mode_storage(type_t *type)
712 type = skip_typeref(type);
714 /* Firm doesn't report a mode for arrays and structs/unions. */
715 if (!is_type_scalar(type)) {
719 ir_type *const irtype = get_ir_type(type);
720 ir_mode *const mode = get_type_mode(irtype);
721 assert(mode != NULL);
726 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
727 * int that it returns bigger modes for floating point on some platforms
728 * (x87 internally does arithemtic with 80bits)
730 static ir_mode *get_ir_mode_arithmetic(type_t *type)
732 ir_mode *mode = get_ir_mode_storage(type);
733 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
734 return mode_float_arithmetic;
741 * Return a node representing the size of a type.
743 static ir_node *get_type_size_node(type_t *type)
746 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
747 type = skip_typeref(type);
749 if (is_type_array(type) && type->array.is_vla) {
750 ir_node *size_node = get_vla_size(&type->array);
751 ir_node *elem_size = get_type_size_node(type->array.element_type);
752 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
756 size = get_type_size(type);
757 return new_Const_long(mode, size);
760 /** Names of the runtime functions. */
761 static const struct {
762 int id; /**< the rts id */
763 int n_res; /**< number of return values */
764 const char *name; /**< the name of the rts function */
765 int n_params; /**< number of parameters */
766 unsigned flags; /**< language flags */
768 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
769 { rts_abort, 0, "abort", 0, _C89 },
770 { rts_alloca, 1, "alloca", 1, _ALL },
771 { rts_abs, 1, "abs", 1, _C89 },
772 { rts_labs, 1, "labs", 1, _C89 },
773 { rts_llabs, 1, "llabs", 1, _C99 },
774 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
776 { rts_fabs, 1, "fabs", 1, _C89 },
777 { rts_sqrt, 1, "sqrt", 1, _C89 },
778 { rts_cbrt, 1, "cbrt", 1, _C99 },
779 { rts_exp, 1, "exp", 1, _C89 },
780 { rts_exp2, 1, "exp2", 1, _C89 },
781 { rts_exp10, 1, "exp10", 1, _GNUC },
782 { rts_log, 1, "log", 1, _C89 },
783 { rts_log2, 1, "log2", 1, _C89 },
784 { rts_log10, 1, "log10", 1, _C89 },
785 { rts_pow, 1, "pow", 2, _C89 },
786 { rts_sin, 1, "sin", 1, _C89 },
787 { rts_cos, 1, "cos", 1, _C89 },
788 { rts_tan, 1, "tan", 1, _C89 },
789 { rts_asin, 1, "asin", 1, _C89 },
790 { rts_acos, 1, "acos", 1, _C89 },
791 { rts_atan, 1, "atan", 1, _C89 },
792 { rts_sinh, 1, "sinh", 1, _C89 },
793 { rts_cosh, 1, "cosh", 1, _C89 },
794 { rts_tanh, 1, "tanh", 1, _C89 },
796 { rts_fabsf, 1, "fabsf", 1, _C99 },
797 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
798 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
799 { rts_expf, 1, "expf", 1, _C99 },
800 { rts_exp2f, 1, "exp2f", 1, _C99 },
801 { rts_exp10f, 1, "exp10f", 1, _GNUC },
802 { rts_logf, 1, "logf", 1, _C99 },
803 { rts_log2f, 1, "log2f", 1, _C99 },
804 { rts_log10f, 1, "log10f", 1, _C99 },
805 { rts_powf, 1, "powf", 2, _C99 },
806 { rts_sinf, 1, "sinf", 1, _C99 },
807 { rts_cosf, 1, "cosf", 1, _C99 },
808 { rts_tanf, 1, "tanf", 1, _C99 },
809 { rts_asinf, 1, "asinf", 1, _C99 },
810 { rts_acosf, 1, "acosf", 1, _C99 },
811 { rts_atanf, 1, "atanf", 1, _C99 },
812 { rts_sinhf, 1, "sinhf", 1, _C99 },
813 { rts_coshf, 1, "coshf", 1, _C99 },
814 { rts_tanhf, 1, "tanhf", 1, _C99 },
816 { rts_fabsl, 1, "fabsl", 1, _C99 },
817 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
818 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
819 { rts_expl, 1, "expl", 1, _C99 },
820 { rts_exp2l, 1, "exp2l", 1, _C99 },
821 { rts_exp10l, 1, "exp10l", 1, _GNUC },
822 { rts_logl, 1, "logl", 1, _C99 },
823 { rts_log2l, 1, "log2l", 1, _C99 },
824 { rts_log10l, 1, "log10l", 1, _C99 },
825 { rts_powl, 1, "powl", 2, _C99 },
826 { rts_sinl, 1, "sinl", 1, _C99 },
827 { rts_cosl, 1, "cosl", 1, _C99 },
828 { rts_tanl, 1, "tanl", 1, _C99 },
829 { rts_asinl, 1, "asinl", 1, _C99 },
830 { rts_acosl, 1, "acosl", 1, _C99 },
831 { rts_atanl, 1, "atanl", 1, _C99 },
832 { rts_sinhl, 1, "sinhl", 1, _C99 },
833 { rts_coshl, 1, "coshl", 1, _C99 },
834 { rts_tanhl, 1, "tanhl", 1, _C99 },
836 { rts_strcmp, 1, "strcmp", 2, _C89 },
837 { rts_strncmp, 1, "strncmp", 3, _C89 },
838 { rts_strcpy, 1, "strcpy", 2, _C89 },
839 { rts_strlen, 1, "strlen", 1, _C89 },
840 { rts_memcpy, 1, "memcpy", 3, _C89 },
841 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
842 { rts_memmove, 1, "memmove", 3, _C89 },
843 { rts_memset, 1, "memset", 3, _C89 },
844 { rts_memcmp, 1, "memcmp", 3, _C89 },
847 static ident *rts_idents[lengthof(rts_data)];
849 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
851 void set_create_ld_ident(ident *(*func)(entity_t*))
853 create_ld_ident = func;
856 static bool declaration_is_definition(const entity_t *entity)
858 switch (entity->kind) {
859 case ENTITY_VARIABLE:
860 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
861 case ENTITY_FUNCTION:
862 return entity->function.statement != NULL;
863 case ENTITY_PARAMETER:
864 case ENTITY_COMPOUND_MEMBER:
868 case ENTITY_ENUM_VALUE:
869 case ENTITY_NAMESPACE:
871 case ENTITY_LOCAL_LABEL:
874 panic("declaration_is_definition called on non-declaration");
878 * Handle GNU attributes for entities
880 * @param ent the entity
881 * @param decl the routine declaration
883 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
885 assert(is_declaration(entity));
886 decl_modifiers_t modifiers = entity->declaration.modifiers;
888 if (is_method_entity(irentity)) {
889 if (modifiers & DM_PURE) {
890 set_entity_additional_properties(irentity, mtp_property_pure);
892 if (modifiers & DM_CONST) {
893 add_entity_additional_properties(irentity, mtp_property_const);
896 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
897 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
899 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
900 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
901 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
905 static bool is_main(entity_t *entity)
907 static symbol_t *sym_main = NULL;
908 if (sym_main == NULL) {
909 sym_main = symbol_table_insert("main");
912 if (entity->base.symbol != sym_main)
914 /* must be in outermost scope */
915 if (entity->base.parent_scope != ¤t_translation_unit->scope)
922 * Creates an entity representing a function.
924 * @param entity the function declaration/definition
925 * @param owner_type the owner type of this function, NULL
926 * for global functions
928 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
930 assert(entity->kind == ENTITY_FUNCTION);
931 if (entity->function.irentity != NULL)
932 return entity->function.irentity;
934 switch (entity->function.btk) {
937 case BUILTIN_LIBC_CHECK:
943 symbol_t *symbol = entity->base.symbol;
944 ident *id = new_id_from_str(symbol->string);
946 /* already an entity defined? */
947 ir_entity *irentity = entitymap_get(&entitymap, symbol);
948 bool const has_body = entity->function.statement != NULL;
949 if (irentity != NULL) {
953 ir_type *ir_type_method;
954 if (entity->function.need_closure)
955 ir_type_method = create_method_type(&entity->declaration.type->function, true);
957 ir_type_method = get_ir_type(entity->declaration.type);
959 bool nested_function = false;
960 if (owner_type == NULL)
961 owner_type = get_glob_type();
963 nested_function = true;
965 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
966 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
970 ld_id = id_unique("inner.%u");
972 ld_id = create_ld_ident(entity);
973 set_entity_ld_ident(irentity, ld_id);
975 handle_decl_modifiers(irentity, entity);
977 if (! nested_function) {
978 storage_class_tag_t const storage_class
979 = (storage_class_tag_t) entity->declaration.storage_class;
980 if (storage_class == STORAGE_CLASS_STATIC) {
981 set_entity_visibility(irentity, ir_visibility_local);
983 set_entity_visibility(irentity, ir_visibility_external);
986 bool const is_inline = entity->function.is_inline;
987 if (is_inline && has_body) {
988 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
989 || ((c_mode & _C99) == 0
990 && storage_class == STORAGE_CLASS_EXTERN)) {
991 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
995 /* nested functions are always local */
996 set_entity_visibility(irentity, ir_visibility_local);
999 /* We should check for file scope here, but as long as we compile C only
1000 this is not needed. */
1001 if (!freestanding && !has_body) {
1002 /* check for a known runtime function */
1003 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1004 if (id != rts_idents[i])
1007 function_type_t *function_type
1008 = &entity->declaration.type->function;
1009 /* rts_entities code can't handle a "wrong" number of parameters */
1010 if (function_type->unspecified_parameters)
1013 /* check number of parameters */
1014 int n_params = count_parameters(function_type);
1015 if (n_params != rts_data[i].n_params)
1018 type_t *return_type = skip_typeref(function_type->return_type);
1019 int n_res = is_type_void(return_type) ? 0 : 1;
1020 if (n_res != rts_data[i].n_res)
1023 /* ignore those rts functions not necessary needed for current mode */
1024 if ((c_mode & rts_data[i].flags) == 0)
1026 assert(rts_entities[rts_data[i].id] == NULL);
1027 rts_entities[rts_data[i].id] = irentity;
1031 entitymap_insert(&entitymap, symbol, irentity);
1034 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1035 entity->function.irentity = irentity;
1041 * Creates a SymConst for a given entity.
1043 * @param dbgi debug info
1044 * @param entity the entity
1046 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1048 assert(entity != NULL);
1049 union symconst_symbol sym;
1050 sym.entity_p = entity;
1051 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1054 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1056 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1059 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1062 if (is_Const(value)) {
1063 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1066 ir_node *cond = new_d_Cond(dbgi, value);
1067 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1068 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1069 ir_node *tblock = new_Block(1, &proj_true);
1070 ir_node *fblock = new_Block(1, &proj_false);
1071 set_cur_block(tblock);
1072 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1073 ir_node *tjump = new_Jmp();
1074 set_cur_block(fblock);
1075 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1076 ir_node *fjump = new_Jmp();
1078 ir_node *in[2] = { tjump, fjump };
1079 ir_node *mergeblock = new_Block(2, in);
1080 set_cur_block(mergeblock);
1081 ir_node *phi_in[2] = { const1, const0 };
1082 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1086 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1088 ir_mode *value_mode = get_irn_mode(value);
1090 if (value_mode == dest_mode)
1093 if (dest_mode == mode_b) {
1094 ir_node *zero = new_Const(get_mode_null(value_mode));
1095 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1097 } else if (value_mode == mode_b) {
1098 return create_conv_from_b(dbgi, value, dest_mode);
1101 return new_d_Conv(dbgi, value, dest_mode);
1105 * Creates a SymConst node representing a wide string literal.
1107 * @param literal the wide string literal
1109 static ir_node *wide_string_literal_to_firm(
1110 const string_literal_expression_t *literal)
1112 ir_type *const global_type = get_glob_type();
1113 ir_type *const elem_type = ir_type_wchar_t;
1114 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1115 ir_type *const type = new_type_array(1, elem_type);
1117 ident *const id = id_unique("str.%u");
1118 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1119 set_entity_ld_ident(entity, id);
1120 set_entity_visibility(entity, ir_visibility_private);
1121 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1123 ir_mode *const mode = get_type_mode(elem_type);
1124 const size_t slen = wstrlen(&literal->value);
1126 set_array_lower_bound_int(type, 0, 0);
1127 set_array_upper_bound_int(type, 0, slen);
1128 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1129 set_type_state(type, layout_fixed);
1131 ir_initializer_t *initializer = create_initializer_compound(slen);
1132 const char *p = literal->value.begin;
1133 for (size_t i = 0; i < slen; ++i) {
1134 assert(p < literal->value.begin + literal->value.size);
1135 utf32 v = read_utf8_char(&p);
1136 ir_tarval *tv = new_tarval_from_long(v, mode);
1137 ir_initializer_t *val = create_initializer_tarval(tv);
1138 set_initializer_compound_value(initializer, i, val);
1140 set_entity_initializer(entity, initializer);
1142 return create_symconst(dbgi, entity);
1146 * Creates a SymConst node representing a string constant.
1148 * @param src_pos the source position of the string constant
1149 * @param id_prefix a prefix for the name of the generated string constant
1150 * @param value the value of the string constant
1152 static ir_node *string_to_firm(const source_position_t *const src_pos,
1153 const char *const id_prefix,
1154 const string_t *const value)
1156 ir_type *const global_type = get_glob_type();
1157 dbg_info *const dbgi = get_dbg_info(src_pos);
1158 ir_type *const elem_type = ir_type_char;
1159 ir_type *const type = new_type_array(1, elem_type);
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_mode *const mode = get_type_mode(elem_type);
1168 const char* const string = value->begin;
1169 const size_t slen = value->size;
1171 set_array_lower_bound_int(type, 0, 0);
1172 set_array_upper_bound_int(type, 0, slen);
1173 set_type_size_bytes(type, slen);
1174 set_type_state(type, layout_fixed);
1176 ir_initializer_t *initializer = create_initializer_compound(slen);
1177 for (size_t i = 0; i < slen; ++i) {
1178 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1179 ir_initializer_t *val = create_initializer_tarval(tv);
1180 set_initializer_compound_value(initializer, i, val);
1182 set_entity_initializer(entity, initializer);
1184 return create_symconst(dbgi, entity);
1187 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1189 const char *string = literal->value.begin;
1190 size_t size = literal->value.size;
1192 assert(type->kind == TYPE_ATOMIC);
1193 atomic_type_kind_t akind = type->atomic.akind;
1195 ir_mode *const mode = atomic_modes[akind];
1196 ir_tarval *const tv = new_tarval_from_str(string, size, mode);
1197 if (tv == tarval_bad)
1200 literal->base.type = type;
1201 literal->target_value = tv;
1205 static void create_integer_tarval(literal_expression_t *literal)
1207 /* -1: signed only, 0: any, 1: unsigned only */
1208 int sign = literal->value.begin[0] != '0' /* decimal */ ? -1 : 0;
1210 const string_t *suffix = &literal->suffix;
1212 if (suffix->size > 0) {
1213 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1214 if (*c == 'u' || *c == 'U') sign = 1;
1215 if (*c == 'l' || *c == 'L') { ++ls; }
1219 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1221 /* now try if the constant is small enough for some types */
1222 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1224 if (sign <= 0 && try_create_integer(literal, type_int))
1226 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1230 if (sign <= 0 && try_create_integer(literal, type_long))
1232 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1235 /* last try? then we should not report tarval_bad */
1237 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1238 if (sign <= 0 && try_create_integer(literal, type_long_long))
1243 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1244 bool res = try_create_integer(literal, type_unsigned_long_long);
1246 panic("internal error when parsing number literal");
1249 tarval_set_integer_overflow_mode(old_mode);
1252 void determine_literal_type(literal_expression_t *literal)
1254 switch (literal->base.kind) {
1255 case EXPR_LITERAL_INTEGER:
1256 create_integer_tarval(literal);
1264 * Creates a Const node representing a constant.
1266 static ir_node *literal_to_firm(const literal_expression_t *literal)
1268 type_t *type = skip_typeref(literal->base.type);
1269 ir_mode *mode = get_ir_mode_storage(type);
1270 const char *string = literal->value.begin;
1271 size_t size = literal->value.size;
1274 switch (literal->base.kind) {
1275 case EXPR_LITERAL_WIDE_CHARACTER: {
1276 utf32 v = read_utf8_char(&string);
1278 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1280 tv = new_tarval_from_str(buf, len, mode);
1284 case EXPR_LITERAL_CHARACTER: {
1287 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1288 if (size == 1 && char_is_signed) {
1289 v = (signed char)string[0];
1292 for (size_t i = 0; i < size; ++i) {
1293 v = (v << 8) | ((unsigned char)string[i]);
1297 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1299 tv = new_tarval_from_str(buf, len, mode);
1303 case EXPR_LITERAL_INTEGER:
1304 assert(literal->target_value != NULL);
1305 tv = literal->target_value;
1308 case EXPR_LITERAL_FLOATINGPOINT:
1309 tv = new_tarval_from_str(string, size, mode);
1312 case EXPR_LITERAL_BOOLEAN:
1313 if (string[0] == 't') {
1314 tv = get_mode_one(mode);
1316 assert(string[0] == 'f');
1317 case EXPR_LITERAL_MS_NOOP:
1318 tv = get_mode_null(mode);
1323 panic("Invalid literal kind found");
1326 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1327 ir_node *res = new_d_Const(dbgi, tv);
1328 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1329 return create_conv(dbgi, res, mode_arith);
1333 * Allocate an area of size bytes aligned at alignment
1336 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1338 static unsigned area_cnt = 0;
1341 ir_type *tp = new_type_array(1, ir_type_char);
1342 set_array_bounds_int(tp, 0, 0, size);
1343 set_type_alignment_bytes(tp, alignment);
1345 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1346 ident *name = new_id_from_str(buf);
1347 ir_entity *area = new_entity(frame_type, name, tp);
1349 /* mark this entity as compiler generated */
1350 set_entity_compiler_generated(area, 1);
1355 * Return a node representing a trampoline region
1356 * for a given function entity.
1358 * @param dbgi debug info
1359 * @param entity the function entity
1361 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1363 ir_entity *region = NULL;
1366 if (current_trampolines != NULL) {
1367 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1368 if (current_trampolines[i].function == entity) {
1369 region = current_trampolines[i].region;
1374 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1376 ir_graph *irg = current_ir_graph;
1377 if (region == NULL) {
1378 /* create a new region */
1379 ir_type *frame_tp = get_irg_frame_type(irg);
1380 trampoline_region reg;
1381 reg.function = entity;
1383 reg.region = alloc_trampoline(frame_tp,
1384 be_params->trampoline_size,
1385 be_params->trampoline_align);
1386 ARR_APP1(trampoline_region, current_trampolines, reg);
1387 region = reg.region;
1389 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1394 * Creates a trampoline for a function represented by an entity.
1396 * @param dbgi debug info
1397 * @param mode the (reference) mode for the function address
1398 * @param entity the function entity
1400 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1403 assert(entity != NULL);
1405 in[0] = get_trampoline_region(dbgi, entity);
1406 in[1] = create_symconst(dbgi, entity);
1407 in[2] = get_irg_frame(current_ir_graph);
1409 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1410 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1411 return new_Proj(irn, mode, pn_Builtin_max+1);
1415 * Dereference an address.
1417 * @param dbgi debug info
1418 * @param type the type of the dereferenced result (the points_to type)
1419 * @param addr the address to dereference
1421 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1422 ir_node *const addr)
1424 type_t *skipped = skip_typeref(type);
1425 if (is_type_incomplete(skipped))
1428 ir_type *irtype = get_ir_type(skipped);
1429 if (is_compound_type(irtype)
1430 || is_Method_type(irtype)
1431 || is_Array_type(irtype)) {
1435 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1436 ? cons_volatile : cons_none;
1437 ir_mode *const mode = get_type_mode(irtype);
1438 ir_node *const memory = get_store();
1439 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1440 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1441 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1443 set_store(load_mem);
1445 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1446 return create_conv(dbgi, load_res, mode_arithmetic);
1450 * Creates a strict Conv (to the node's mode) if necessary.
1452 * @param dbgi debug info
1453 * @param node the node to strict conv
1455 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1457 ir_mode *mode = get_irn_mode(node);
1459 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1461 if (!mode_is_float(mode))
1464 /* check if there is already a Conv */
1465 if (is_Conv(node)) {
1466 /* convert it into a strict Conv */
1467 set_Conv_strict(node, 1);
1471 /* otherwise create a new one */
1472 return new_d_strictConv(dbgi, node, mode);
1476 * Returns the correct base address depending on whether it is a parameter or a
1477 * normal local variable.
1479 static ir_node *get_local_frame(ir_entity *const ent)
1481 ir_graph *const irg = current_ir_graph;
1482 const ir_type *const owner = get_entity_owner(ent);
1483 if (owner == current_outer_frame) {
1484 assert(current_static_link != NULL);
1485 return current_static_link;
1487 return get_irg_frame(irg);
1492 * Keep all memory edges of the given block.
1494 static void keep_all_memory(ir_node *block)
1496 ir_node *old = get_cur_block();
1498 set_cur_block(block);
1499 keep_alive(get_store());
1500 /* TODO: keep all memory edges from restricted pointers */
1504 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1506 entity_t *entity = ref->entity;
1507 if (entity->enum_value.tv == NULL) {
1508 type_t *type = skip_typeref(entity->enum_value.enum_type);
1509 assert(type->kind == TYPE_ENUM);
1510 determine_enum_values(&type->enumt);
1513 return new_Const(entity->enum_value.tv);
1516 static ir_node *reference_addr(const reference_expression_t *ref)
1518 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1519 entity_t *entity = ref->entity;
1520 assert(is_declaration(entity));
1522 if (entity->kind == ENTITY_FUNCTION
1523 && entity->function.btk != BUILTIN_NONE) {
1524 ir_entity *irentity = get_function_entity(entity, NULL);
1525 /* for gcc compatibility we have to produce (dummy) addresses for some
1526 * builtins which don't have entities */
1527 if (irentity == NULL) {
1528 source_position_t const *const pos = &ref->base.source_position;
1529 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1531 /* simply create a NULL pointer */
1532 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1533 ir_node *res = new_Const(get_mode_null(mode));
1539 switch((declaration_kind_t) entity->declaration.kind) {
1540 case DECLARATION_KIND_UNKNOWN:
1542 case DECLARATION_KIND_PARAMETER:
1543 case DECLARATION_KIND_LOCAL_VARIABLE:
1544 /* you can store to a local variable (so we don't panic but return NULL
1545 * as an indicator for no real address) */
1547 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1548 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1552 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1553 case DECLARATION_KIND_PARAMETER_ENTITY: {
1554 ir_entity *irentity = entity->variable.v.entity;
1555 ir_node *frame = get_local_frame(irentity);
1556 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1560 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1561 return entity->variable.v.vla_base;
1563 case DECLARATION_KIND_FUNCTION: {
1564 return create_symconst(dbgi, entity->function.irentity);
1567 case DECLARATION_KIND_INNER_FUNCTION: {
1568 type_t *const type = skip_typeref(entity->declaration.type);
1569 ir_mode *const mode = get_ir_mode_storage(type);
1570 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1571 /* inner function not using the closure */
1572 return create_symconst(dbgi, entity->function.irentity);
1574 /* need trampoline here */
1575 return create_trampoline(dbgi, mode, entity->function.irentity);
1579 case DECLARATION_KIND_COMPOUND_MEMBER:
1580 panic("not implemented reference type");
1583 panic("reference to declaration with unknown type found");
1586 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1588 dbg_info *const dbgi = get_dbg_info(&ref->base.source_position);
1589 entity_t *const entity = ref->entity;
1590 assert(is_declaration(entity));
1592 switch ((declaration_kind_t)entity->declaration.kind) {
1593 case DECLARATION_KIND_LOCAL_VARIABLE:
1594 case DECLARATION_KIND_PARAMETER: {
1595 type_t *const type = skip_typeref(entity->declaration.type);
1596 ir_mode *const mode = get_ir_mode_storage(type);
1597 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1598 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1602 ir_node *const addr = reference_addr(ref);
1603 return deref_address(dbgi, entity->declaration.type, addr);
1609 * Transform calls to builtin functions.
1611 static ir_node *process_builtin_call(const call_expression_t *call)
1613 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1615 assert(call->function->kind == EXPR_REFERENCE);
1616 reference_expression_t *builtin = &call->function->reference;
1618 type_t *expr_type = skip_typeref(builtin->base.type);
1619 assert(is_type_pointer(expr_type));
1621 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1623 switch (builtin->entity->function.btk) {
1626 case BUILTIN_ALLOCA: {
1627 expression_t *argument = call->arguments->expression;
1628 ir_node *size = expression_to_firm(argument);
1630 ir_node *store = get_store();
1631 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1633 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1635 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1640 type_t *type = function_type->function.return_type;
1641 ir_mode *mode = get_ir_mode_arithmetic(type);
1642 ir_tarval *tv = get_mode_infinite(mode);
1643 ir_node *res = new_d_Const(dbgi, tv);
1647 /* Ignore string for now... */
1648 assert(is_type_function(function_type));
1649 type_t *type = function_type->function.return_type;
1650 ir_mode *mode = get_ir_mode_arithmetic(type);
1651 ir_tarval *tv = get_mode_NAN(mode);
1652 ir_node *res = new_d_Const(dbgi, tv);
1655 case BUILTIN_EXPECT: {
1656 expression_t *argument = call->arguments->expression;
1657 return _expression_to_firm(argument);
1659 case BUILTIN_VA_END:
1660 /* evaluate the argument of va_end for its side effects */
1661 _expression_to_firm(call->arguments->expression);
1663 case BUILTIN_OBJECT_SIZE: {
1664 /* determine value of "type" */
1665 expression_t *type_expression = call->arguments->next->expression;
1666 long type_val = fold_constant_to_int(type_expression);
1667 type_t *type = function_type->function.return_type;
1668 ir_mode *mode = get_ir_mode_arithmetic(type);
1669 /* just produce a "I don't know" result */
1670 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1671 get_mode_minus_one(mode);
1673 return new_d_Const(dbgi, result);
1675 case BUILTIN_ROTL: {
1676 ir_node *val = expression_to_firm(call->arguments->expression);
1677 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1678 ir_mode *mode = get_irn_mode(val);
1679 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1680 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1682 case BUILTIN_ROTR: {
1683 ir_node *val = expression_to_firm(call->arguments->expression);
1684 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1685 ir_mode *mode = get_irn_mode(val);
1686 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1687 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1688 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1689 return new_d_Rotl(dbgi, val, sub, mode);
1694 case BUILTIN_LIBC_CHECK:
1695 panic("builtin did not produce an entity");
1697 panic("invalid builtin found");
1701 * Transform a call expression.
1702 * Handles some special cases, like alloca() calls, which must be resolved
1703 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1704 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1707 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1709 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1710 assert(currently_reachable());
1712 expression_t *function = call->function;
1713 ir_node *callee = NULL;
1714 bool firm_builtin = false;
1715 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1716 if (function->kind == EXPR_REFERENCE) {
1717 const reference_expression_t *ref = &function->reference;
1718 entity_t *entity = ref->entity;
1720 if (entity->kind == ENTITY_FUNCTION) {
1721 builtin_kind_t builtin = entity->function.btk;
1722 if (builtin == BUILTIN_FIRM) {
1723 firm_builtin = true;
1724 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1725 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1726 && builtin != BUILTIN_LIBC_CHECK) {
1727 return process_builtin_call(call);
1732 callee = expression_to_firm(function);
1734 type_t *type = skip_typeref(function->base.type);
1735 assert(is_type_pointer(type));
1736 pointer_type_t *pointer_type = &type->pointer;
1737 type_t *points_to = skip_typeref(pointer_type->points_to);
1738 assert(is_type_function(points_to));
1739 function_type_t *function_type = &points_to->function;
1741 int n_parameters = 0;
1742 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1743 ir_type *new_method_type = NULL;
1744 if (function_type->variadic || function_type->unspecified_parameters) {
1745 const call_argument_t *argument = call->arguments;
1746 for ( ; argument != NULL; argument = argument->next) {
1750 /* we need to construct a new method type matching the call
1752 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1753 int n_res = get_method_n_ress(ir_method_type);
1754 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1755 set_method_calling_convention(new_method_type,
1756 get_method_calling_convention(ir_method_type));
1757 set_method_additional_properties(new_method_type,
1758 get_method_additional_properties(ir_method_type));
1759 set_method_variadicity(new_method_type,
1760 get_method_variadicity(ir_method_type));
1762 for (int i = 0; i < n_res; ++i) {
1763 set_method_res_type(new_method_type, i,
1764 get_method_res_type(ir_method_type, i));
1766 argument = call->arguments;
1767 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1768 expression_t *expression = argument->expression;
1769 ir_type *irtype = get_ir_type(expression->base.type);
1770 set_method_param_type(new_method_type, i, irtype);
1772 ir_method_type = new_method_type;
1774 n_parameters = get_method_n_params(ir_method_type);
1777 ir_node *in[n_parameters];
1779 const call_argument_t *argument = call->arguments;
1780 for (int n = 0; n < n_parameters; ++n) {
1781 expression_t *expression = argument->expression;
1782 ir_node *arg_node = expression_to_firm(expression);
1784 type_t *arg_type = skip_typeref(expression->base.type);
1785 if (!is_type_compound(arg_type)) {
1786 ir_mode *const mode = get_ir_mode_storage(arg_type);
1787 arg_node = create_conv(dbgi, arg_node, mode);
1788 arg_node = do_strict_conv(dbgi, arg_node);
1793 argument = argument->next;
1797 if (function_type->modifiers & DM_CONST) {
1798 store = get_irg_no_mem(current_ir_graph);
1800 store = get_store();
1804 type_t *return_type = skip_typeref(function_type->return_type);
1805 ir_node *result = NULL;
1807 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1809 if (! (function_type->modifiers & DM_CONST)) {
1810 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1814 if (!is_type_void(return_type)) {
1815 assert(is_type_scalar(return_type));
1816 ir_mode *mode = get_ir_mode_storage(return_type);
1817 result = new_Proj(node, mode, pn_Builtin_max+1);
1818 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1819 result = create_conv(NULL, result, mode_arith);
1822 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1823 if (! (function_type->modifiers & DM_CONST)) {
1824 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1828 if (!is_type_void(return_type)) {
1829 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1830 ir_mode *const mode = get_ir_mode_storage(return_type);
1831 result = new_Proj(resproj, mode, 0);
1832 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1833 result = create_conv(NULL, result, mode_arith);
1837 if (function_type->modifiers & DM_NORETURN) {
1838 /* A dead end: Keep the Call and the Block. Also place all further
1839 * nodes into a new and unreachable block. */
1841 keep_alive(get_cur_block());
1842 ir_node *block = new_Block(0, NULL);
1843 set_cur_block(block);
1849 static ir_node *statement_to_firm(statement_t *statement);
1850 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1852 static ir_node *expression_to_addr(const expression_t *expression);
1853 static ir_node *create_condition_evaluation(const expression_t *expression,
1854 ir_node *true_block,
1855 ir_node *false_block);
1857 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1860 if (!is_type_compound(type)) {
1861 ir_mode *mode = get_ir_mode_storage(type);
1862 value = create_conv(dbgi, value, mode);
1863 value = do_strict_conv(dbgi, value);
1866 ir_node *memory = get_store();
1868 if (is_type_scalar(type)) {
1869 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1870 ? cons_volatile : cons_none;
1871 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1872 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1873 set_store(store_mem);
1875 ir_type *irtype = get_ir_type(type);
1876 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1877 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1878 set_store(copyb_mem);
1882 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1884 ir_tarval *all_one = get_mode_all_one(mode);
1885 int mode_size = get_mode_size_bits(mode);
1886 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1888 assert(offset >= 0);
1890 assert(offset + size <= mode_size);
1891 if (size == mode_size) {
1895 long shiftr = get_mode_size_bits(mode) - size;
1896 long shiftl = offset;
1897 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1898 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1899 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1900 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1905 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1906 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1909 ir_type *entity_type = get_entity_type(entity);
1910 ir_type *base_type = get_primitive_base_type(entity_type);
1911 ir_mode *mode = get_type_mode(base_type);
1912 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1914 value = create_conv(dbgi, value, mode);
1916 /* kill upper bits of value and shift to right position */
1917 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1918 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1919 unsigned base_bits = get_mode_size_bits(mode);
1920 unsigned shiftwidth = base_bits - bitsize;
1922 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1923 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1925 unsigned shrwidth = base_bits - bitsize - bitoffset;
1926 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1927 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1929 /* load current value */
1930 ir_node *mem = get_store();
1931 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1932 set_volatile ? cons_volatile : cons_none);
1933 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1934 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1935 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1936 ir_tarval *inv_mask = tarval_not(shift_mask);
1937 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1938 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1940 /* construct new value and store */
1941 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1942 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1943 set_volatile ? cons_volatile : cons_none);
1944 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1945 set_store(store_mem);
1951 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1952 if (mode_is_signed(mode)) {
1953 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1955 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1960 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1963 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1964 entity_t *entity = expression->compound_entry;
1965 type_t *base_type = entity->declaration.type;
1966 ir_mode *mode = get_ir_mode_storage(base_type);
1967 ir_node *mem = get_store();
1968 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1969 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1970 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1971 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1973 ir_mode *amode = mode;
1974 /* optimisation, since shifting in modes < machine_size is usually
1976 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1979 unsigned amode_size = get_mode_size_bits(amode);
1980 load_res = create_conv(dbgi, load_res, amode);
1982 set_store(load_mem);
1984 /* kill upper bits */
1985 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1986 unsigned bitoffset = entity->compound_member.bit_offset;
1987 unsigned bitsize = entity->compound_member.bit_size;
1988 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1989 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1990 ir_node *countl = new_d_Const(dbgi, tvl);
1991 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1993 unsigned shift_bitsr = bitoffset + shift_bitsl;
1994 assert(shift_bitsr <= amode_size);
1995 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1996 ir_node *countr = new_d_Const(dbgi, tvr);
1998 if (mode_is_signed(mode)) {
1999 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2001 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2004 type_t *type = expression->base.type;
2005 ir_mode *resmode = get_ir_mode_arithmetic(type);
2006 return create_conv(dbgi, shiftr, resmode);
2009 /* make sure the selected compound type is constructed */
2010 static void construct_select_compound(const select_expression_t *expression)
2012 type_t *type = skip_typeref(expression->compound->base.type);
2013 if (is_type_pointer(type)) {
2014 type = type->pointer.points_to;
2016 (void) get_ir_type(type);
2019 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2020 ir_node *value, ir_node *addr)
2022 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2023 type_t *type = skip_typeref(expression->base.type);
2025 if (!is_type_compound(type)) {
2026 ir_mode *mode = get_ir_mode_storage(type);
2027 value = create_conv(dbgi, value, mode);
2028 value = do_strict_conv(dbgi, value);
2031 if (expression->kind == EXPR_REFERENCE) {
2032 const reference_expression_t *ref = &expression->reference;
2034 entity_t *entity = ref->entity;
2035 assert(is_declaration(entity));
2036 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2037 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2038 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2039 set_value(entity->variable.v.value_number, value);
2045 addr = expression_to_addr(expression);
2046 assert(addr != NULL);
2048 if (expression->kind == EXPR_SELECT) {
2049 const select_expression_t *select = &expression->select;
2051 construct_select_compound(select);
2053 entity_t *entity = select->compound_entry;
2054 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2055 if (entity->compound_member.bitfield) {
2056 ir_entity *irentity = entity->compound_member.entity;
2058 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2059 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2060 set_volatile, true);
2065 assign_value(dbgi, addr, type, value);
2069 static void set_value_for_expression(const expression_t *expression,
2072 set_value_for_expression_addr(expression, value, NULL);
2075 static ir_node *get_value_from_lvalue(const expression_t *expression,
2078 if (expression->kind == EXPR_REFERENCE) {
2079 const reference_expression_t *ref = &expression->reference;
2081 entity_t *entity = ref->entity;
2082 assert(entity->kind == ENTITY_VARIABLE
2083 || entity->kind == ENTITY_PARAMETER);
2084 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2086 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2087 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2088 value_number = entity->variable.v.value_number;
2089 assert(addr == NULL);
2090 type_t *type = skip_typeref(expression->base.type);
2091 ir_mode *mode = get_ir_mode_storage(type);
2092 ir_node *res = get_value(value_number, mode);
2093 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2097 assert(addr != NULL);
2098 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2101 if (expression->kind == EXPR_SELECT &&
2102 expression->select.compound_entry->compound_member.bitfield) {
2103 construct_select_compound(&expression->select);
2104 value = bitfield_extract_to_firm(&expression->select, addr);
2106 value = deref_address(dbgi, expression->base.type, addr);
2113 static ir_node *create_incdec(const unary_expression_t *expression)
2115 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2116 const expression_t *value_expr = expression->value;
2117 ir_node *addr = expression_to_addr(value_expr);
2118 ir_node *value = get_value_from_lvalue(value_expr, addr);
2120 type_t *type = skip_typeref(expression->base.type);
2121 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2124 if (is_type_pointer(type)) {
2125 pointer_type_t *pointer_type = &type->pointer;
2126 offset = get_type_size_node(pointer_type->points_to);
2128 assert(is_type_arithmetic(type));
2129 offset = new_Const(get_mode_one(mode));
2133 ir_node *store_value;
2134 switch(expression->base.kind) {
2135 case EXPR_UNARY_POSTFIX_INCREMENT:
2137 store_value = new_d_Add(dbgi, value, offset, mode);
2139 case EXPR_UNARY_POSTFIX_DECREMENT:
2141 store_value = new_d_Sub(dbgi, value, offset, mode);
2143 case EXPR_UNARY_PREFIX_INCREMENT:
2144 result = new_d_Add(dbgi, value, offset, mode);
2145 store_value = result;
2147 case EXPR_UNARY_PREFIX_DECREMENT:
2148 result = new_d_Sub(dbgi, value, offset, mode);
2149 store_value = result;
2152 panic("no incdec expr in create_incdec");
2155 set_value_for_expression_addr(value_expr, store_value, addr);
2160 static bool is_local_variable(expression_t *expression)
2162 if (expression->kind != EXPR_REFERENCE)
2164 reference_expression_t *ref_expr = &expression->reference;
2165 entity_t *entity = ref_expr->entity;
2166 if (entity->kind != ENTITY_VARIABLE)
2168 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2169 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2172 static ir_relation get_relation(const expression_kind_t kind)
2175 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2176 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2177 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2178 case EXPR_BINARY_ISLESS:
2179 case EXPR_BINARY_LESS: return ir_relation_less;
2180 case EXPR_BINARY_ISLESSEQUAL:
2181 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2182 case EXPR_BINARY_ISGREATER:
2183 case EXPR_BINARY_GREATER: return ir_relation_greater;
2184 case EXPR_BINARY_ISGREATEREQUAL:
2185 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2186 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2191 panic("trying to get pn_Cmp from non-comparison binexpr type");
2195 * Handle the assume optimizer hint: check if a Confirm
2196 * node can be created.
2198 * @param dbi debug info
2199 * @param expr the IL assume expression
2201 * we support here only some simple cases:
2206 static ir_node *handle_assume_compare(dbg_info *dbi,
2207 const binary_expression_t *expression)
2209 expression_t *op1 = expression->left;
2210 expression_t *op2 = expression->right;
2211 entity_t *var2, *var = NULL;
2212 ir_node *res = NULL;
2213 ir_relation relation = get_relation(expression->base.kind);
2215 if (is_local_variable(op1) && is_local_variable(op2)) {
2216 var = op1->reference.entity;
2217 var2 = op2->reference.entity;
2219 type_t *const type = skip_typeref(var->declaration.type);
2220 ir_mode *const mode = get_ir_mode_storage(type);
2222 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2223 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2225 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2226 set_value(var2->variable.v.value_number, res);
2228 res = new_d_Confirm(dbi, irn1, irn2, relation);
2229 set_value(var->variable.v.value_number, res);
2234 expression_t *con = NULL;
2235 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2236 var = op1->reference.entity;
2238 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2239 relation = get_inversed_relation(relation);
2240 var = op2->reference.entity;
2245 type_t *const type = skip_typeref(var->declaration.type);
2246 ir_mode *const mode = get_ir_mode_storage(type);
2248 res = get_value(var->variable.v.value_number, mode);
2249 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2250 set_value(var->variable.v.value_number, res);
2256 * Handle the assume optimizer hint.
2258 * @param dbi debug info
2259 * @param expr the IL assume expression
2261 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2263 switch(expression->kind) {
2264 case EXPR_BINARY_EQUAL:
2265 case EXPR_BINARY_NOTEQUAL:
2266 case EXPR_BINARY_LESS:
2267 case EXPR_BINARY_LESSEQUAL:
2268 case EXPR_BINARY_GREATER:
2269 case EXPR_BINARY_GREATEREQUAL:
2270 return handle_assume_compare(dbi, &expression->binary);
2276 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2277 type_t *from_type, type_t *type)
2279 type = skip_typeref(type);
2280 if (is_type_void(type)) {
2281 /* make sure firm type is constructed */
2282 (void) get_ir_type(type);
2285 if (!is_type_scalar(type)) {
2286 /* make sure firm type is constructed */
2287 (void) get_ir_type(type);
2291 from_type = skip_typeref(from_type);
2292 ir_mode *mode = get_ir_mode_storage(type);
2293 /* check for conversion from / to __based types */
2294 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2295 const variable_t *from_var = from_type->pointer.base_variable;
2296 const variable_t *to_var = type->pointer.base_variable;
2297 if (from_var != to_var) {
2298 if (from_var != NULL) {
2299 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2300 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2301 value_node = new_d_Add(dbgi, value_node, base, mode);
2303 if (to_var != NULL) {
2304 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2305 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2306 value_node = new_d_Sub(dbgi, value_node, base, mode);
2311 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2312 /* bool adjustments (we save a mode_Bu, but have to temporarily
2313 * convert to mode_b so we only get a 0/1 value */
2314 value_node = create_conv(dbgi, value_node, mode_b);
2317 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2318 ir_node *node = create_conv(dbgi, value_node, mode);
2319 node = do_strict_conv(dbgi, node);
2320 node = create_conv(dbgi, node, mode_arith);
2325 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2327 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2328 type_t *type = skip_typeref(expression->base.type);
2330 const expression_t *value = expression->value;
2332 switch(expression->base.kind) {
2333 case EXPR_UNARY_TAKE_ADDRESS:
2334 return expression_to_addr(value);
2336 case EXPR_UNARY_NEGATE: {
2337 ir_node *value_node = expression_to_firm(value);
2338 ir_mode *mode = get_ir_mode_arithmetic(type);
2339 return new_d_Minus(dbgi, value_node, mode);
2341 case EXPR_UNARY_PLUS:
2342 return expression_to_firm(value);
2343 case EXPR_UNARY_BITWISE_NEGATE: {
2344 ir_node *value_node = expression_to_firm(value);
2345 ir_mode *mode = get_ir_mode_arithmetic(type);
2346 return new_d_Not(dbgi, value_node, mode);
2348 case EXPR_UNARY_NOT: {
2349 ir_node *value_node = _expression_to_firm(value);
2350 value_node = create_conv(dbgi, value_node, mode_b);
2351 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2354 case EXPR_UNARY_DEREFERENCE: {
2355 ir_node *value_node = expression_to_firm(value);
2356 type_t *value_type = skip_typeref(value->base.type);
2357 assert(is_type_pointer(value_type));
2359 /* check for __based */
2360 const variable_t *const base_var = value_type->pointer.base_variable;
2361 if (base_var != NULL) {
2362 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2363 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2364 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2366 type_t *points_to = value_type->pointer.points_to;
2367 return deref_address(dbgi, points_to, value_node);
2369 case EXPR_UNARY_POSTFIX_INCREMENT:
2370 case EXPR_UNARY_POSTFIX_DECREMENT:
2371 case EXPR_UNARY_PREFIX_INCREMENT:
2372 case EXPR_UNARY_PREFIX_DECREMENT:
2373 return create_incdec(expression);
2374 case EXPR_UNARY_CAST: {
2375 ir_node *value_node = expression_to_firm(value);
2376 type_t *from_type = value->base.type;
2377 return create_cast(dbgi, value_node, from_type, type);
2379 case EXPR_UNARY_ASSUME:
2380 return handle_assume(dbgi, value);
2385 panic("invalid UNEXPR type found");
2389 * produces a 0/1 depending of the value of a mode_b node
2391 static ir_node *produce_condition_result(const expression_t *expression,
2392 ir_mode *mode, dbg_info *dbgi)
2394 ir_node *const one_block = new_immBlock();
2395 ir_node *const zero_block = new_immBlock();
2396 create_condition_evaluation(expression, one_block, zero_block);
2397 mature_immBlock(one_block);
2398 mature_immBlock(zero_block);
2400 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2401 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2402 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2403 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2404 set_cur_block(block);
2406 ir_node *const one = new_Const(get_mode_one(mode));
2407 ir_node *const zero = new_Const(get_mode_null(mode));
2408 ir_node *const in[2] = { one, zero };
2409 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2414 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2415 ir_node *value, type_t *type)
2417 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2418 assert(is_type_pointer(type));
2419 pointer_type_t *const pointer_type = &type->pointer;
2420 type_t *const points_to = skip_typeref(pointer_type->points_to);
2421 ir_node * elem_size = get_type_size_node(points_to);
2422 elem_size = create_conv(dbgi, elem_size, mode);
2423 value = create_conv(dbgi, value, mode);
2424 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2428 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2429 ir_node *left, ir_node *right)
2432 type_t *type_left = skip_typeref(expression->left->base.type);
2433 type_t *type_right = skip_typeref(expression->right->base.type);
2435 expression_kind_t kind = expression->base.kind;
2438 case EXPR_BINARY_SHIFTLEFT:
2439 case EXPR_BINARY_SHIFTRIGHT:
2440 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2441 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2442 mode = get_ir_mode_arithmetic(expression->base.type);
2443 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2446 case EXPR_BINARY_SUB:
2447 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2448 const pointer_type_t *const ptr_type = &type_left->pointer;
2450 mode = get_ir_mode_arithmetic(expression->base.type);
2451 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2452 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2453 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2454 ir_node *const no_mem = new_NoMem();
2455 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2456 mode, op_pin_state_floats);
2457 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2460 case EXPR_BINARY_SUB_ASSIGN:
2461 if (is_type_pointer(type_left)) {
2462 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2463 mode = get_ir_mode_arithmetic(type_left);
2468 case EXPR_BINARY_ADD:
2469 case EXPR_BINARY_ADD_ASSIGN:
2470 if (is_type_pointer(type_left)) {
2471 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2472 mode = get_ir_mode_arithmetic(type_left);
2474 } else if (is_type_pointer(type_right)) {
2475 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2476 mode = get_ir_mode_arithmetic(type_right);
2483 mode = get_ir_mode_arithmetic(type_right);
2484 left = create_conv(dbgi, left, mode);
2489 case EXPR_BINARY_ADD_ASSIGN:
2490 case EXPR_BINARY_ADD:
2491 return new_d_Add(dbgi, left, right, mode);
2492 case EXPR_BINARY_SUB_ASSIGN:
2493 case EXPR_BINARY_SUB:
2494 return new_d_Sub(dbgi, left, right, mode);
2495 case EXPR_BINARY_MUL_ASSIGN:
2496 case EXPR_BINARY_MUL:
2497 return new_d_Mul(dbgi, left, right, mode);
2498 case EXPR_BINARY_BITWISE_AND:
2499 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2500 return new_d_And(dbgi, left, right, mode);
2501 case EXPR_BINARY_BITWISE_OR:
2502 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2503 return new_d_Or(dbgi, left, right, mode);
2504 case EXPR_BINARY_BITWISE_XOR:
2505 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2506 return new_d_Eor(dbgi, left, right, mode);
2507 case EXPR_BINARY_SHIFTLEFT:
2508 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2509 return new_d_Shl(dbgi, left, right, mode);
2510 case EXPR_BINARY_SHIFTRIGHT:
2511 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2512 if (mode_is_signed(mode)) {
2513 return new_d_Shrs(dbgi, left, right, mode);
2515 return new_d_Shr(dbgi, left, right, mode);
2517 case EXPR_BINARY_DIV:
2518 case EXPR_BINARY_DIV_ASSIGN: {
2519 ir_node *pin = new_Pin(new_NoMem());
2520 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2521 op_pin_state_floats);
2522 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2525 case EXPR_BINARY_MOD:
2526 case EXPR_BINARY_MOD_ASSIGN: {
2527 ir_node *pin = new_Pin(new_NoMem());
2528 assert(!mode_is_float(mode));
2529 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2530 op_pin_state_floats);
2531 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2535 panic("unexpected expression kind");
2539 static ir_node *create_lazy_op(const binary_expression_t *expression)
2541 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2542 type_t *type = skip_typeref(expression->base.type);
2543 ir_mode *mode = get_ir_mode_arithmetic(type);
2545 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2546 bool val = fold_constant_to_bool(expression->left);
2547 expression_kind_t ekind = expression->base.kind;
2548 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2549 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2551 return new_Const(get_mode_null(mode));
2555 return new_Const(get_mode_one(mode));
2559 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2560 bool valr = fold_constant_to_bool(expression->right);
2561 return create_Const_from_bool(mode, valr);
2564 return produce_condition_result(expression->right, mode, dbgi);
2567 return produce_condition_result((const expression_t*) expression, mode,
2571 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2572 ir_node *right, ir_mode *mode);
2574 static ir_node *create_assign_binop(const binary_expression_t *expression)
2576 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2577 const expression_t *left_expr = expression->left;
2578 type_t *type = skip_typeref(left_expr->base.type);
2579 ir_node *right = expression_to_firm(expression->right);
2580 ir_node *left_addr = expression_to_addr(left_expr);
2581 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2582 ir_node *result = create_op(dbgi, expression, left, right);
2584 result = create_cast(dbgi, result, expression->right->base.type, type);
2585 result = do_strict_conv(dbgi, result);
2587 result = set_value_for_expression_addr(left_expr, result, left_addr);
2589 if (!is_type_compound(type)) {
2590 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2591 result = create_conv(dbgi, result, mode_arithmetic);
2596 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2598 expression_kind_t kind = expression->base.kind;
2601 case EXPR_BINARY_EQUAL:
2602 case EXPR_BINARY_NOTEQUAL:
2603 case EXPR_BINARY_LESS:
2604 case EXPR_BINARY_LESSEQUAL:
2605 case EXPR_BINARY_GREATER:
2606 case EXPR_BINARY_GREATEREQUAL:
2607 case EXPR_BINARY_ISGREATER:
2608 case EXPR_BINARY_ISGREATEREQUAL:
2609 case EXPR_BINARY_ISLESS:
2610 case EXPR_BINARY_ISLESSEQUAL:
2611 case EXPR_BINARY_ISLESSGREATER:
2612 case EXPR_BINARY_ISUNORDERED: {
2613 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2614 ir_node *left = expression_to_firm(expression->left);
2615 ir_node *right = expression_to_firm(expression->right);
2616 ir_relation relation = get_relation(kind);
2617 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2620 case EXPR_BINARY_ASSIGN: {
2621 ir_node *addr = expression_to_addr(expression->left);
2622 ir_node *right = expression_to_firm(expression->right);
2624 = set_value_for_expression_addr(expression->left, right, addr);
2626 type_t *type = skip_typeref(expression->base.type);
2627 if (!is_type_compound(type)) {
2628 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2629 res = create_conv(NULL, res, mode_arithmetic);
2633 case EXPR_BINARY_ADD:
2634 case EXPR_BINARY_SUB:
2635 case EXPR_BINARY_MUL:
2636 case EXPR_BINARY_DIV:
2637 case EXPR_BINARY_MOD:
2638 case EXPR_BINARY_BITWISE_AND:
2639 case EXPR_BINARY_BITWISE_OR:
2640 case EXPR_BINARY_BITWISE_XOR:
2641 case EXPR_BINARY_SHIFTLEFT:
2642 case EXPR_BINARY_SHIFTRIGHT:
2644 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2645 ir_node *left = expression_to_firm(expression->left);
2646 ir_node *right = expression_to_firm(expression->right);
2647 return create_op(dbgi, expression, left, right);
2649 case EXPR_BINARY_LOGICAL_AND:
2650 case EXPR_BINARY_LOGICAL_OR:
2651 return create_lazy_op(expression);
2652 case EXPR_BINARY_COMMA:
2653 /* create side effects of left side */
2654 (void) expression_to_firm(expression->left);
2655 return _expression_to_firm(expression->right);
2657 case EXPR_BINARY_ADD_ASSIGN:
2658 case EXPR_BINARY_SUB_ASSIGN:
2659 case EXPR_BINARY_MUL_ASSIGN:
2660 case EXPR_BINARY_MOD_ASSIGN:
2661 case EXPR_BINARY_DIV_ASSIGN:
2662 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2663 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2664 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2665 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2666 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2667 return create_assign_binop(expression);
2669 panic("TODO binexpr type");
2673 static ir_node *array_access_addr(const array_access_expression_t *expression)
2675 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2676 ir_node *base_addr = expression_to_firm(expression->array_ref);
2677 ir_node *offset = expression_to_firm(expression->index);
2678 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2679 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2680 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2685 static ir_node *array_access_to_firm(
2686 const array_access_expression_t *expression)
2688 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2689 ir_node *addr = array_access_addr(expression);
2690 type_t *type = revert_automatic_type_conversion(
2691 (const expression_t*) expression);
2692 type = skip_typeref(type);
2694 return deref_address(dbgi, type, addr);
2697 static long get_offsetof_offset(const offsetof_expression_t *expression)
2699 type_t *orig_type = expression->type;
2702 designator_t *designator = expression->designator;
2703 for ( ; designator != NULL; designator = designator->next) {
2704 type_t *type = skip_typeref(orig_type);
2705 /* be sure the type is constructed */
2706 (void) get_ir_type(type);
2708 if (designator->symbol != NULL) {
2709 assert(is_type_compound(type));
2710 symbol_t *symbol = designator->symbol;
2712 compound_t *compound = type->compound.compound;
2713 entity_t *iter = compound->members.entities;
2714 for ( ; iter != NULL; iter = iter->base.next) {
2715 if (iter->base.symbol == symbol) {
2719 assert(iter != NULL);
2721 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2722 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2723 offset += get_entity_offset(iter->compound_member.entity);
2725 orig_type = iter->declaration.type;
2727 expression_t *array_index = designator->array_index;
2728 assert(designator->array_index != NULL);
2729 assert(is_type_array(type));
2731 long index = fold_constant_to_int(array_index);
2732 ir_type *arr_type = get_ir_type(type);
2733 ir_type *elem_type = get_array_element_type(arr_type);
2734 long elem_size = get_type_size_bytes(elem_type);
2736 offset += index * elem_size;
2738 orig_type = type->array.element_type;
2745 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2747 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2748 long offset = get_offsetof_offset(expression);
2749 ir_tarval *tv = new_tarval_from_long(offset, mode);
2750 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2752 return new_d_Const(dbgi, tv);
2755 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2756 ir_entity *entity, type_t *type);
2757 static ir_initializer_t *create_ir_initializer(
2758 const initializer_t *initializer, type_t *type);
2760 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2761 initializer_t *initializer,
2764 /* create the ir_initializer */
2765 ir_graph *const old_current_ir_graph = current_ir_graph;
2766 current_ir_graph = get_const_code_irg();
2768 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2770 assert(current_ir_graph == get_const_code_irg());
2771 current_ir_graph = old_current_ir_graph;
2773 ident *const id = id_unique("initializer.%u");
2774 ir_type *const irtype = get_ir_type(type);
2775 ir_type *const global_type = get_glob_type();
2776 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2777 set_entity_ld_ident(entity, id);
2778 set_entity_visibility(entity, ir_visibility_private);
2779 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2780 set_entity_initializer(entity, irinitializer);
2784 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2786 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2787 type_t *type = expression->type;
2788 initializer_t *initializer = expression->initializer;
2790 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2791 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2792 return create_symconst(dbgi, entity);
2794 /* create an entity on the stack */
2795 ident *const id = id_unique("CompLit.%u");
2796 ir_type *const irtype = get_ir_type(type);
2797 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2799 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2800 set_entity_ld_ident(entity, id);
2802 /* create initialisation code */
2803 create_local_initializer(initializer, dbgi, entity, type);
2805 /* create a sel for the compound literal address */
2806 ir_node *frame = get_irg_frame(current_ir_graph);
2807 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2812 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2814 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2815 type_t *const type = expr->type;
2816 ir_node *const addr = compound_literal_addr(expr);
2817 return deref_address(dbgi, type, addr);
2821 * Transform a sizeof expression into Firm code.
2823 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2825 type_t *const type = skip_typeref(expression->type);
2826 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2827 if (is_type_array(type) && type->array.is_vla
2828 && expression->tp_expression != NULL) {
2829 expression_to_firm(expression->tp_expression);
2832 return get_type_size_node(type);
2835 static entity_t *get_expression_entity(const expression_t *expression)
2837 if (expression->kind != EXPR_REFERENCE)
2840 return expression->reference.entity;
2843 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2845 switch(entity->kind) {
2846 case DECLARATION_KIND_CASES:
2847 return entity->declaration.alignment;
2850 return entity->compound.alignment;
2851 case ENTITY_TYPEDEF:
2852 return entity->typedefe.alignment;
2860 * Transform an alignof expression into Firm code.
2862 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2864 unsigned alignment = 0;
2866 const expression_t *tp_expression = expression->tp_expression;
2867 if (tp_expression != NULL) {
2868 entity_t *entity = get_expression_entity(tp_expression);
2869 if (entity != NULL) {
2870 alignment = get_cparser_entity_alignment(entity);
2874 if (alignment == 0) {
2875 type_t *type = expression->type;
2876 alignment = get_type_alignment(type);
2879 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2880 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2881 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2882 return new_d_Const(dbgi, tv);
2885 static void init_ir_types(void);
2887 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2889 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2891 bool constant_folding_old = constant_folding;
2892 constant_folding = true;
2893 int old_optimize = get_optimize();
2894 int old_constant_folding = get_opt_constant_folding();
2896 set_opt_constant_folding(1);
2900 ir_graph *old_current_ir_graph = current_ir_graph;
2901 current_ir_graph = get_const_code_irg();
2903 ir_node *const cnst = _expression_to_firm(expression);
2905 current_ir_graph = old_current_ir_graph;
2906 set_optimize(old_optimize);
2907 set_opt_constant_folding(old_constant_folding);
2909 if (!is_Const(cnst)) {
2910 panic("couldn't fold constant");
2913 constant_folding = constant_folding_old;
2915 ir_tarval *const tv = get_Const_tarval(cnst);
2916 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2917 return tarval_convert_to(tv, mode);
2920 /* this function is only used in parser.c, but it relies on libfirm functionality */
2921 bool constant_is_negative(const expression_t *expression)
2923 ir_tarval *tv = fold_constant_to_tarval(expression);
2924 return tarval_is_negative(tv);
2927 long fold_constant_to_int(const expression_t *expression)
2929 ir_tarval *tv = fold_constant_to_tarval(expression);
2930 if (!tarval_is_long(tv)) {
2931 panic("result of constant folding is not integer");
2934 return get_tarval_long(tv);
2937 bool fold_constant_to_bool(const expression_t *expression)
2939 ir_tarval *tv = fold_constant_to_tarval(expression);
2940 return !tarval_is_null(tv);
2943 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2945 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2947 /* first try to fold a constant condition */
2948 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2949 bool val = fold_constant_to_bool(expression->condition);
2951 expression_t *true_expression = expression->true_expression;
2952 if (true_expression == NULL)
2953 true_expression = expression->condition;
2954 return expression_to_firm(true_expression);
2956 return expression_to_firm(expression->false_expression);
2960 ir_node *const true_block = new_immBlock();
2961 ir_node *const false_block = new_immBlock();
2962 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2963 mature_immBlock(true_block);
2964 mature_immBlock(false_block);
2966 set_cur_block(true_block);
2968 if (expression->true_expression != NULL) {
2969 true_val = expression_to_firm(expression->true_expression);
2970 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2971 true_val = cond_expr;
2973 /* Condition ended with a short circuit (&&, ||, !) operation or a
2974 * comparison. Generate a "1" as value for the true branch. */
2975 true_val = new_Const(get_mode_one(mode_Is));
2977 ir_node *const true_jmp = new_d_Jmp(dbgi);
2979 set_cur_block(false_block);
2980 ir_node *const false_val = expression_to_firm(expression->false_expression);
2981 ir_node *const false_jmp = new_d_Jmp(dbgi);
2983 /* create the common block */
2984 ir_node *const in_cf[2] = { true_jmp, false_jmp };
2985 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2986 set_cur_block(block);
2988 /* TODO improve static semantics, so either both or no values are NULL */
2989 if (true_val == NULL || false_val == NULL)
2992 ir_node *const in[2] = { true_val, false_val };
2993 type_t *const type = skip_typeref(expression->base.type);
2994 ir_mode *const mode = get_ir_mode_arithmetic(type);
2995 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3001 * Returns an IR-node representing the address of a field.
3003 static ir_node *select_addr(const select_expression_t *expression)
3005 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3007 construct_select_compound(expression);
3009 ir_node *compound_addr = expression_to_firm(expression->compound);
3011 entity_t *entry = expression->compound_entry;
3012 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3013 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3015 if (constant_folding) {
3016 ir_mode *mode = get_irn_mode(compound_addr);
3017 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3018 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3019 return new_d_Add(dbgi, compound_addr, ofs, mode);
3021 ir_entity *irentity = entry->compound_member.entity;
3022 assert(irentity != NULL);
3023 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3027 static ir_node *select_to_firm(const select_expression_t *expression)
3029 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3030 ir_node *addr = select_addr(expression);
3031 type_t *type = revert_automatic_type_conversion(
3032 (const expression_t*) expression);
3033 type = skip_typeref(type);
3035 entity_t *entry = expression->compound_entry;
3036 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3038 if (entry->compound_member.bitfield) {
3039 return bitfield_extract_to_firm(expression, addr);
3042 return deref_address(dbgi, type, addr);
3045 /* Values returned by __builtin_classify_type. */
3046 typedef enum gcc_type_class
3052 enumeral_type_class,
3055 reference_type_class,
3059 function_type_class,
3070 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3072 type_t *type = expr->type_expression->base.type;
3074 /* FIXME gcc returns different values depending on whether compiling C or C++
3075 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3078 type = skip_typeref(type);
3079 switch (type->kind) {
3081 const atomic_type_t *const atomic_type = &type->atomic;
3082 switch (atomic_type->akind) {
3083 /* should not be reached */
3084 case ATOMIC_TYPE_INVALID:
3088 /* gcc cannot do that */
3089 case ATOMIC_TYPE_VOID:
3090 tc = void_type_class;
3093 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3094 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3095 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3096 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3097 case ATOMIC_TYPE_SHORT:
3098 case ATOMIC_TYPE_USHORT:
3099 case ATOMIC_TYPE_INT:
3100 case ATOMIC_TYPE_UINT:
3101 case ATOMIC_TYPE_LONG:
3102 case ATOMIC_TYPE_ULONG:
3103 case ATOMIC_TYPE_LONGLONG:
3104 case ATOMIC_TYPE_ULONGLONG:
3105 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3106 tc = integer_type_class;
3109 case ATOMIC_TYPE_FLOAT:
3110 case ATOMIC_TYPE_DOUBLE:
3111 case ATOMIC_TYPE_LONG_DOUBLE:
3112 tc = real_type_class;
3115 panic("Unexpected atomic type in classify_type_to_firm().");
3118 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3119 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3120 case TYPE_ARRAY: /* gcc handles this as pointer */
3121 case TYPE_FUNCTION: /* gcc handles this as pointer */
3122 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3123 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3124 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3126 /* gcc handles this as integer */
3127 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3129 /* gcc classifies the referenced type */
3130 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3132 /* typedef/typeof should be skipped already */
3138 panic("unexpected TYPE classify_type_to_firm().");
3142 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3143 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3144 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3145 return new_d_Const(dbgi, tv);
3148 static ir_node *function_name_to_firm(
3149 const funcname_expression_t *const expr)
3151 switch(expr->kind) {
3152 case FUNCNAME_FUNCTION:
3153 case FUNCNAME_PRETTY_FUNCTION:
3154 case FUNCNAME_FUNCDNAME:
3155 if (current_function_name == NULL) {
3156 const source_position_t *const src_pos = &expr->base.source_position;
3157 const char *name = current_function_entity->base.symbol->string;
3158 const string_t string = { name, strlen(name) + 1 };
3159 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3161 return current_function_name;
3162 case FUNCNAME_FUNCSIG:
3163 if (current_funcsig == NULL) {
3164 const source_position_t *const src_pos = &expr->base.source_position;
3165 ir_entity *ent = get_irg_entity(current_ir_graph);
3166 const char *const name = get_entity_ld_name(ent);
3167 const string_t string = { name, strlen(name) + 1 };
3168 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3170 return current_funcsig;
3172 panic("Unsupported function name");
3175 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3177 statement_t *statement = expr->statement;
3179 assert(statement->kind == STATEMENT_COMPOUND);
3180 return compound_statement_to_firm(&statement->compound);
3183 static ir_node *va_start_expression_to_firm(
3184 const va_start_expression_t *const expr)
3186 ir_entity *param_ent = current_vararg_entity;
3187 if (param_ent == NULL) {
3188 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3189 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3190 ir_type *const param_type = get_unknown_type();
3191 param_ent = new_parameter_entity(frame_type, n, param_type);
3192 current_vararg_entity = param_ent;
3195 ir_node *const frame = get_irg_frame(current_ir_graph);
3196 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3197 ir_node *const no_mem = new_NoMem();
3198 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3200 set_value_for_expression(expr->ap, arg_sel);
3205 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3207 type_t *const type = expr->base.type;
3208 expression_t *const ap_expr = expr->ap;
3209 ir_node *const ap_addr = expression_to_addr(ap_expr);
3210 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3211 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3212 ir_node *const res = deref_address(dbgi, type, ap);
3214 ir_node *const cnst = get_type_size_node(expr->base.type);
3215 ir_mode *const mode = get_irn_mode(cnst);
3216 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3217 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3218 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3219 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3220 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3222 set_value_for_expression_addr(ap_expr, add, ap_addr);
3228 * Generate Firm for a va_copy expression.
3230 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3232 ir_node *const src = expression_to_firm(expr->src);
3233 set_value_for_expression(expr->dst, src);
3237 static ir_node *dereference_addr(const unary_expression_t *const expression)
3239 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3240 return expression_to_firm(expression->value);
3244 * Returns a IR-node representing an lvalue of the given expression.
3246 static ir_node *expression_to_addr(const expression_t *expression)
3248 switch(expression->kind) {
3249 case EXPR_ARRAY_ACCESS:
3250 return array_access_addr(&expression->array_access);
3252 return call_expression_to_firm(&expression->call);
3253 case EXPR_COMPOUND_LITERAL:
3254 return compound_literal_addr(&expression->compound_literal);
3255 case EXPR_REFERENCE:
3256 return reference_addr(&expression->reference);
3258 return select_addr(&expression->select);
3259 case EXPR_UNARY_DEREFERENCE:
3260 return dereference_addr(&expression->unary);
3264 panic("trying to get address of non-lvalue");
3267 static ir_node *builtin_constant_to_firm(
3268 const builtin_constant_expression_t *expression)
3270 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3271 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3272 return create_Const_from_bool(mode, v);
3275 static ir_node *builtin_types_compatible_to_firm(
3276 const builtin_types_compatible_expression_t *expression)
3278 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3279 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3280 bool const value = types_compatible(left, right);
3281 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3282 return create_Const_from_bool(mode, value);
3285 static ir_node *get_label_block(label_t *label)
3287 if (label->block != NULL)
3288 return label->block;
3290 /* beware: might be called from create initializer with current_ir_graph
3291 * set to const_code_irg. */
3292 ir_graph *rem = current_ir_graph;
3293 current_ir_graph = current_function;
3295 ir_node *block = new_immBlock();
3297 label->block = block;
3299 ARR_APP1(label_t *, all_labels, label);
3301 current_ir_graph = rem;
3306 * Pointer to a label. This is used for the
3307 * GNU address-of-label extension.
3309 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3311 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3312 ir_node *block = get_label_block(label->label);
3313 ir_entity *entity = create_Block_entity(block);
3315 symconst_symbol value;
3316 value.entity_p = entity;
3317 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3321 * creates firm nodes for an expression. The difference between this function
3322 * and expression_to_firm is, that this version might produce mode_b nodes
3323 * instead of mode_Is.
3325 static ir_node *_expression_to_firm(expression_t const *const expr)
3328 if (!constant_folding) {
3329 assert(!expr->base.transformed);
3330 ((expression_t*)expr)->base.transformed = true;
3334 switch (expr->kind) {
3335 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3336 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3337 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3338 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3339 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3340 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3341 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3342 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3343 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3344 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3345 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3346 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3347 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3348 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3349 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3350 case EXPR_SELECT: return select_to_firm( &expr->select);
3351 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3352 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3353 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3354 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3355 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3356 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3357 case EXPR_WIDE_STRING_LITERAL: return wide_string_literal_to_firm( &expr->string_literal);
3359 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3361 case EXPR_ERROR: break;
3363 panic("invalid expression found");
3367 * Check if a given expression is a GNU __builtin_expect() call.
3369 static bool is_builtin_expect(const expression_t *expression)
3371 if (expression->kind != EXPR_CALL)
3374 expression_t *function = expression->call.function;
3375 if (function->kind != EXPR_REFERENCE)
3377 reference_expression_t *ref = &function->reference;
3378 if (ref->entity->kind != ENTITY_FUNCTION ||
3379 ref->entity->function.btk != BUILTIN_EXPECT)
3385 static bool produces_mode_b(const expression_t *expression)
3387 switch (expression->kind) {
3388 case EXPR_BINARY_EQUAL:
3389 case EXPR_BINARY_NOTEQUAL:
3390 case EXPR_BINARY_LESS:
3391 case EXPR_BINARY_LESSEQUAL:
3392 case EXPR_BINARY_GREATER:
3393 case EXPR_BINARY_GREATEREQUAL:
3394 case EXPR_BINARY_ISGREATER:
3395 case EXPR_BINARY_ISGREATEREQUAL:
3396 case EXPR_BINARY_ISLESS:
3397 case EXPR_BINARY_ISLESSEQUAL:
3398 case EXPR_BINARY_ISLESSGREATER:
3399 case EXPR_BINARY_ISUNORDERED:
3400 case EXPR_UNARY_NOT:
3404 if (is_builtin_expect(expression)) {
3405 expression_t *argument = expression->call.arguments->expression;
3406 return produces_mode_b(argument);
3409 case EXPR_BINARY_COMMA:
3410 return produces_mode_b(expression->binary.right);
3417 static ir_node *expression_to_firm(const expression_t *expression)
3419 if (!produces_mode_b(expression)) {
3420 ir_node *res = _expression_to_firm(expression);
3421 assert(res == NULL || get_irn_mode(res) != mode_b);
3425 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3426 return new_Const(fold_constant_to_tarval(expression));
3429 /* we have to produce a 0/1 from the mode_b expression */
3430 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3431 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3432 return produce_condition_result(expression, mode, dbgi);
3436 * create a short-circuit expression evaluation that tries to construct
3437 * efficient control flow structures for &&, || and ! expressions
3439 static ir_node *create_condition_evaluation(const expression_t *expression,
3440 ir_node *true_block,
3441 ir_node *false_block)
3443 switch(expression->kind) {
3444 case EXPR_UNARY_NOT: {
3445 const unary_expression_t *unary_expression = &expression->unary;
3446 create_condition_evaluation(unary_expression->value, false_block,
3450 case EXPR_BINARY_LOGICAL_AND: {
3451 const binary_expression_t *binary_expression = &expression->binary;
3453 ir_node *extra_block = new_immBlock();
3454 create_condition_evaluation(binary_expression->left, extra_block,
3456 mature_immBlock(extra_block);
3457 set_cur_block(extra_block);
3458 create_condition_evaluation(binary_expression->right, true_block,
3462 case EXPR_BINARY_LOGICAL_OR: {
3463 const binary_expression_t *binary_expression = &expression->binary;
3465 ir_node *extra_block = new_immBlock();
3466 create_condition_evaluation(binary_expression->left, true_block,
3468 mature_immBlock(extra_block);
3469 set_cur_block(extra_block);
3470 create_condition_evaluation(binary_expression->right, true_block,
3478 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3479 ir_node *cond_expr = _expression_to_firm(expression);
3480 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3481 ir_node *cond = new_d_Cond(dbgi, condition);
3482 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3483 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3485 /* set branch prediction info based on __builtin_expect */
3486 if (is_builtin_expect(expression) && is_Cond(cond)) {
3487 call_argument_t *argument = expression->call.arguments->next;
3488 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3489 bool const cnst = fold_constant_to_bool(argument->expression);
3490 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3491 set_Cond_jmp_pred(cond, pred);
3495 add_immBlock_pred(true_block, true_proj);
3496 add_immBlock_pred(false_block, false_proj);
3498 set_unreachable_now();
3502 static void create_variable_entity(entity_t *variable,
3503 declaration_kind_t declaration_kind,
3504 ir_type *parent_type)
3506 assert(variable->kind == ENTITY_VARIABLE);
3507 type_t *type = skip_typeref(variable->declaration.type);
3509 ident *const id = new_id_from_str(variable->base.symbol->string);
3510 ir_type *const irtype = get_ir_type(type);
3511 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3512 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3513 unsigned alignment = variable->declaration.alignment;
3515 set_entity_alignment(irentity, alignment);
3517 handle_decl_modifiers(irentity, variable);
3519 variable->declaration.kind = (unsigned char) declaration_kind;
3520 variable->variable.v.entity = irentity;
3521 set_entity_ld_ident(irentity, create_ld_ident(variable));
3523 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3524 set_entity_volatility(irentity, volatility_is_volatile);
3529 typedef struct type_path_entry_t type_path_entry_t;
3530 struct type_path_entry_t {
3532 ir_initializer_t *initializer;
3534 entity_t *compound_entry;
3537 typedef struct type_path_t type_path_t;
3538 struct type_path_t {
3539 type_path_entry_t *path;
3544 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3546 size_t len = ARR_LEN(path->path);
3548 for (size_t i = 0; i < len; ++i) {
3549 const type_path_entry_t *entry = & path->path[i];
3551 type_t *type = skip_typeref(entry->type);
3552 if (is_type_compound(type)) {
3553 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3554 } else if (is_type_array(type)) {
3555 fprintf(stderr, "[%u]", (unsigned) entry->index);
3557 fprintf(stderr, "-INVALID-");
3560 fprintf(stderr, " (");
3561 print_type(path->top_type);
3562 fprintf(stderr, ")");
3565 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3567 size_t len = ARR_LEN(path->path);
3569 return & path->path[len-1];
3572 static type_path_entry_t *append_to_type_path(type_path_t *path)
3574 size_t len = ARR_LEN(path->path);
3575 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3577 type_path_entry_t *result = & path->path[len];
3578 memset(result, 0, sizeof(result[0]));
3582 static size_t get_compound_member_count(const compound_type_t *type)
3584 compound_t *compound = type->compound;
3585 size_t n_members = 0;
3586 entity_t *member = compound->members.entities;
3587 for ( ; member != NULL; member = member->base.next) {
3594 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3596 type_t *orig_top_type = path->top_type;
3597 type_t *top_type = skip_typeref(orig_top_type);
3599 assert(is_type_compound(top_type) || is_type_array(top_type));
3601 if (ARR_LEN(path->path) == 0) {
3604 type_path_entry_t *top = get_type_path_top(path);
3605 ir_initializer_t *initializer = top->initializer;
3606 return get_initializer_compound_value(initializer, top->index);
3610 static void descend_into_subtype(type_path_t *path)
3612 type_t *orig_top_type = path->top_type;
3613 type_t *top_type = skip_typeref(orig_top_type);
3615 assert(is_type_compound(top_type) || is_type_array(top_type));
3617 ir_initializer_t *initializer = get_initializer_entry(path);
3619 type_path_entry_t *top = append_to_type_path(path);
3620 top->type = top_type;
3624 if (is_type_compound(top_type)) {
3625 compound_t *const compound = top_type->compound.compound;
3626 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3628 top->compound_entry = entry;
3630 len = get_compound_member_count(&top_type->compound);
3631 if (entry != NULL) {
3632 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3633 path->top_type = entry->declaration.type;
3636 assert(is_type_array(top_type));
3637 assert(top_type->array.size > 0);
3640 path->top_type = top_type->array.element_type;
3641 len = top_type->array.size;
3643 if (initializer == NULL
3644 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3645 initializer = create_initializer_compound(len);
3646 /* we have to set the entry at the 2nd latest path entry... */
3647 size_t path_len = ARR_LEN(path->path);
3648 assert(path_len >= 1);
3650 type_path_entry_t *entry = & path->path[path_len-2];
3651 ir_initializer_t *tinitializer = entry->initializer;
3652 set_initializer_compound_value(tinitializer, entry->index,
3656 top->initializer = initializer;
3659 static void ascend_from_subtype(type_path_t *path)
3661 type_path_entry_t *top = get_type_path_top(path);
3663 path->top_type = top->type;
3665 size_t len = ARR_LEN(path->path);
3666 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3669 static void walk_designator(type_path_t *path, const designator_t *designator)
3671 /* designators start at current object type */
3672 ARR_RESIZE(type_path_entry_t, path->path, 1);
3674 for ( ; designator != NULL; designator = designator->next) {
3675 type_path_entry_t *top = get_type_path_top(path);
3676 type_t *orig_type = top->type;
3677 type_t *type = skip_typeref(orig_type);
3679 if (designator->symbol != NULL) {
3680 assert(is_type_compound(type));
3682 symbol_t *symbol = designator->symbol;
3684 compound_t *compound = type->compound.compound;
3685 entity_t *iter = compound->members.entities;
3686 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3687 if (iter->base.symbol == symbol) {
3688 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3692 assert(iter != NULL);
3694 /* revert previous initialisations of other union elements */
3695 if (type->kind == TYPE_COMPOUND_UNION) {
3696 ir_initializer_t *initializer = top->initializer;
3697 if (initializer != NULL
3698 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3699 /* are we writing to a new element? */
3700 ir_initializer_t *oldi
3701 = get_initializer_compound_value(initializer, index);
3702 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3703 /* clear initializer */
3705 = get_initializer_compound_n_entries(initializer);
3706 ir_initializer_t *nulli = get_initializer_null();
3707 for (size_t i = 0; i < len; ++i) {
3708 set_initializer_compound_value(initializer, i,
3715 top->type = orig_type;
3716 top->compound_entry = iter;
3718 orig_type = iter->declaration.type;
3720 expression_t *array_index = designator->array_index;
3721 assert(designator->array_index != NULL);
3722 assert(is_type_array(type));
3724 long index = fold_constant_to_int(array_index);
3727 if (type->array.size_constant) {
3728 long array_size = type->array.size;
3729 assert(index < array_size);
3733 top->type = orig_type;
3734 top->index = (size_t) index;
3735 orig_type = type->array.element_type;
3737 path->top_type = orig_type;
3739 if (designator->next != NULL) {
3740 descend_into_subtype(path);
3744 path->invalid = false;
3747 static void advance_current_object(type_path_t *path)
3749 if (path->invalid) {
3750 /* TODO: handle this... */
3751 panic("invalid initializer in ast2firm (excessive elements)");
3754 type_path_entry_t *top = get_type_path_top(path);
3756 type_t *type = skip_typeref(top->type);
3757 if (is_type_union(type)) {
3758 /* only the first element is initialized in unions */
3759 top->compound_entry = NULL;
3760 } else if (is_type_struct(type)) {
3761 entity_t *entry = top->compound_entry;
3764 entry = skip_unnamed_bitfields(entry->base.next);
3765 top->compound_entry = entry;
3766 if (entry != NULL) {
3767 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3768 path->top_type = entry->declaration.type;
3772 assert(is_type_array(type));
3775 if (!type->array.size_constant || top->index < type->array.size) {
3780 /* we're past the last member of the current sub-aggregate, try if we
3781 * can ascend in the type hierarchy and continue with another subobject */
3782 size_t len = ARR_LEN(path->path);
3785 ascend_from_subtype(path);
3786 advance_current_object(path);
3788 path->invalid = true;
3793 static ir_initializer_t *create_ir_initializer_value(
3794 const initializer_value_t *initializer)
3796 if (is_type_compound(initializer->value->base.type)) {
3797 panic("initializer creation for compounds not implemented yet");
3799 type_t *type = initializer->value->base.type;
3800 expression_t *expr = initializer->value;
3801 ir_node *value = expression_to_firm(expr);
3802 ir_mode *mode = get_ir_mode_storage(type);
3803 value = create_conv(NULL, value, mode);
3804 return create_initializer_const(value);
3807 /** test wether type can be initialized by a string constant */
3808 static bool is_string_type(type_t *type)
3811 if (is_type_pointer(type)) {
3812 inner = skip_typeref(type->pointer.points_to);
3813 } else if(is_type_array(type)) {
3814 inner = skip_typeref(type->array.element_type);
3819 return is_type_integer(inner);
3822 static ir_initializer_t *create_ir_initializer_list(
3823 const initializer_list_t *initializer, type_t *type)
3826 memset(&path, 0, sizeof(path));
3827 path.top_type = type;
3828 path.path = NEW_ARR_F(type_path_entry_t, 0);
3830 descend_into_subtype(&path);
3832 for (size_t i = 0; i < initializer->len; ++i) {
3833 const initializer_t *sub_initializer = initializer->initializers[i];
3835 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3836 walk_designator(&path, sub_initializer->designator.designator);
3840 if (sub_initializer->kind == INITIALIZER_VALUE) {
3841 /* we might have to descend into types until we're at a scalar
3844 type_t *orig_top_type = path.top_type;
3845 type_t *top_type = skip_typeref(orig_top_type);
3847 if (is_type_scalar(top_type))
3849 descend_into_subtype(&path);
3851 } else if (sub_initializer->kind == INITIALIZER_STRING
3852 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3853 /* we might have to descend into types until we're at a scalar
3856 type_t *orig_top_type = path.top_type;
3857 type_t *top_type = skip_typeref(orig_top_type);
3859 if (is_string_type(top_type))
3861 descend_into_subtype(&path);
3865 ir_initializer_t *sub_irinitializer
3866 = create_ir_initializer(sub_initializer, path.top_type);
3868 size_t path_len = ARR_LEN(path.path);
3869 assert(path_len >= 1);
3870 type_path_entry_t *entry = & path.path[path_len-1];
3871 ir_initializer_t *tinitializer = entry->initializer;
3872 set_initializer_compound_value(tinitializer, entry->index,
3875 advance_current_object(&path);
3878 assert(ARR_LEN(path.path) >= 1);
3879 ir_initializer_t *result = path.path[0].initializer;
3880 DEL_ARR_F(path.path);
3885 static ir_initializer_t *create_ir_initializer_string(
3886 const initializer_string_t *initializer, type_t *type)
3888 type = skip_typeref(type);
3890 size_t string_len = initializer->string.size;
3891 assert(type->kind == TYPE_ARRAY);
3892 assert(type->array.size_constant);
3893 size_t len = type->array.size;
3894 ir_initializer_t *irinitializer = create_initializer_compound(len);
3896 const char *string = initializer->string.begin;
3897 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3899 for (size_t i = 0; i < len; ++i) {
3904 ir_tarval *tv = new_tarval_from_long(c, mode);
3905 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3907 set_initializer_compound_value(irinitializer, i, char_initializer);
3910 return irinitializer;
3913 static ir_initializer_t *create_ir_initializer_wide_string(
3914 const initializer_wide_string_t *initializer, type_t *type)
3916 assert(type->kind == TYPE_ARRAY);
3917 assert(type->array.size_constant);
3918 size_t len = type->array.size;
3919 size_t string_len = wstrlen(&initializer->string);
3920 ir_initializer_t *irinitializer = create_initializer_compound(len);
3922 const char *p = initializer->string.begin;
3923 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3925 for (size_t i = 0; i < len; ++i) {
3927 if (i < string_len) {
3928 c = read_utf8_char(&p);
3930 ir_tarval *tv = new_tarval_from_long(c, mode);
3931 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3933 set_initializer_compound_value(irinitializer, i, char_initializer);
3936 return irinitializer;
3939 static ir_initializer_t *create_ir_initializer(
3940 const initializer_t *initializer, type_t *type)
3942 switch(initializer->kind) {
3943 case INITIALIZER_STRING:
3944 return create_ir_initializer_string(&initializer->string, type);
3946 case INITIALIZER_WIDE_STRING:
3947 return create_ir_initializer_wide_string(&initializer->wide_string,
3950 case INITIALIZER_LIST:
3951 return create_ir_initializer_list(&initializer->list, type);
3953 case INITIALIZER_VALUE:
3954 return create_ir_initializer_value(&initializer->value);
3956 case INITIALIZER_DESIGNATOR:
3957 panic("unexpected designator initializer found");
3959 panic("unknown initializer");
3962 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3963 * are elements [...] the remainder of the aggregate shall be initialized
3964 * implicitly the same as objects that have static storage duration. */
3965 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3968 /* for unions we must NOT do anything for null initializers */
3969 ir_type *owner = get_entity_owner(entity);
3970 if (is_Union_type(owner)) {
3974 ir_type *ent_type = get_entity_type(entity);
3975 /* create sub-initializers for a compound type */
3976 if (is_compound_type(ent_type)) {
3977 unsigned n_members = get_compound_n_members(ent_type);
3978 for (unsigned n = 0; n < n_members; ++n) {
3979 ir_entity *member = get_compound_member(ent_type, n);
3980 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3982 create_dynamic_null_initializer(member, dbgi, addr);
3986 if (is_Array_type(ent_type)) {
3987 assert(has_array_upper_bound(ent_type, 0));
3988 long n = get_array_upper_bound_int(ent_type, 0);
3989 for (long i = 0; i < n; ++i) {
3990 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3991 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3992 ir_node *cnst = new_d_Const(dbgi, index_tv);
3993 ir_node *in[1] = { cnst };
3994 ir_entity *arrent = get_array_element_entity(ent_type);
3995 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3997 create_dynamic_null_initializer(arrent, dbgi, addr);
4002 ir_mode *value_mode = get_type_mode(ent_type);
4003 ir_node *node = new_Const(get_mode_null(value_mode));
4005 /* is it a bitfield type? */
4006 if (is_Primitive_type(ent_type) &&
4007 get_primitive_base_type(ent_type) != NULL) {
4008 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4012 ir_node *mem = get_store();
4013 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4014 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4018 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4019 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4021 switch(get_initializer_kind(initializer)) {
4022 case IR_INITIALIZER_NULL:
4023 create_dynamic_null_initializer(entity, dbgi, base_addr);
4025 case IR_INITIALIZER_CONST: {
4026 ir_node *node = get_initializer_const_value(initializer);
4027 ir_type *ent_type = get_entity_type(entity);
4029 /* is it a bitfield type? */
4030 if (is_Primitive_type(ent_type) &&
4031 get_primitive_base_type(ent_type) != NULL) {
4032 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4036 assert(get_type_mode(type) == get_irn_mode(node));
4037 ir_node *mem = get_store();
4038 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4039 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4043 case IR_INITIALIZER_TARVAL: {
4044 ir_tarval *tv = get_initializer_tarval_value(initializer);
4045 ir_node *cnst = new_d_Const(dbgi, tv);
4046 ir_type *ent_type = get_entity_type(entity);
4048 /* is it a bitfield type? */
4049 if (is_Primitive_type(ent_type) &&
4050 get_primitive_base_type(ent_type) != NULL) {
4051 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4055 assert(get_type_mode(type) == get_tarval_mode(tv));
4056 ir_node *mem = get_store();
4057 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4058 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4062 case IR_INITIALIZER_COMPOUND: {
4063 assert(is_compound_type(type) || is_Array_type(type));
4065 if (is_Array_type(type)) {
4066 assert(has_array_upper_bound(type, 0));
4067 n_members = get_array_upper_bound_int(type, 0);
4069 n_members = get_compound_n_members(type);
4072 if (get_initializer_compound_n_entries(initializer)
4073 != (unsigned) n_members)
4074 panic("initializer doesn't match compound type");
4076 for (int i = 0; i < n_members; ++i) {
4079 ir_entity *sub_entity;
4080 if (is_Array_type(type)) {
4081 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4082 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4083 ir_node *cnst = new_d_Const(dbgi, index_tv);
4084 ir_node *in[1] = { cnst };
4085 irtype = get_array_element_type(type);
4086 sub_entity = get_array_element_entity(type);
4087 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4090 sub_entity = get_compound_member(type, i);
4091 irtype = get_entity_type(sub_entity);
4092 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4096 ir_initializer_t *sub_init
4097 = get_initializer_compound_value(initializer, i);
4099 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4106 panic("invalid IR_INITIALIZER found");
4109 static void create_dynamic_initializer(ir_initializer_t *initializer,
4110 dbg_info *dbgi, ir_entity *entity)
4112 ir_node *frame = get_irg_frame(current_ir_graph);
4113 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4114 ir_type *type = get_entity_type(entity);
4116 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4119 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4120 ir_entity *entity, type_t *type)
4122 ir_node *memory = get_store();
4123 ir_node *nomem = new_NoMem();
4124 ir_node *frame = get_irg_frame(current_ir_graph);
4125 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4127 if (initializer->kind == INITIALIZER_VALUE) {
4128 initializer_value_t *initializer_value = &initializer->value;
4130 ir_node *value = expression_to_firm(initializer_value->value);
4131 type = skip_typeref(type);
4132 assign_value(dbgi, addr, type, value);
4136 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4137 ir_initializer_t *irinitializer
4138 = create_ir_initializer(initializer, type);
4140 create_dynamic_initializer(irinitializer, dbgi, entity);
4144 /* create a "template" entity which is copied to the entity on the stack */
4145 ir_entity *const init_entity
4146 = create_initializer_entity(dbgi, initializer, type);
4147 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4148 ir_type *const irtype = get_ir_type(type);
4149 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4151 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4152 set_store(copyb_mem);
4155 static void create_initializer_local_variable_entity(entity_t *entity)
4157 assert(entity->kind == ENTITY_VARIABLE);
4158 initializer_t *initializer = entity->variable.initializer;
4159 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4160 ir_entity *irentity = entity->variable.v.entity;
4161 type_t *type = entity->declaration.type;
4163 create_local_initializer(initializer, dbgi, irentity, type);
4166 static void create_variable_initializer(entity_t *entity)
4168 assert(entity->kind == ENTITY_VARIABLE);
4169 initializer_t *initializer = entity->variable.initializer;
4170 if (initializer == NULL)
4173 declaration_kind_t declaration_kind
4174 = (declaration_kind_t) entity->declaration.kind;
4175 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4176 create_initializer_local_variable_entity(entity);
4180 type_t *type = entity->declaration.type;
4181 type_qualifiers_t tq = get_type_qualifier(type, true);
4183 if (initializer->kind == INITIALIZER_VALUE) {
4184 expression_t * value = initializer->value.value;
4185 type_t *const init_type = skip_typeref(value->base.type);
4187 if (!is_type_scalar(init_type)) {
4189 while (value->kind == EXPR_UNARY_CAST)
4190 value = value->unary.value;
4192 if (value->kind != EXPR_COMPOUND_LITERAL)
4193 panic("expected non-scalar initializer to be a compound literal");
4194 initializer = value->compound_literal.initializer;
4195 goto have_initializer;
4198 ir_node * node = expression_to_firm(value);
4199 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4200 ir_mode *const mode = get_ir_mode_storage(init_type);
4201 node = create_conv(dbgi, node, mode);
4202 node = do_strict_conv(dbgi, node);
4204 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4205 set_value(entity->variable.v.value_number, node);
4207 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4209 ir_entity *irentity = entity->variable.v.entity;
4211 if (tq & TYPE_QUALIFIER_CONST
4212 && get_entity_owner(irentity) != get_tls_type()) {
4213 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4215 set_atomic_ent_value(irentity, node);
4219 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4220 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4222 ir_entity *irentity = entity->variable.v.entity;
4223 ir_initializer_t *irinitializer
4224 = create_ir_initializer(initializer, type);
4226 if (tq & TYPE_QUALIFIER_CONST) {
4227 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4229 set_entity_initializer(irentity, irinitializer);
4233 static void create_variable_length_array(entity_t *entity)
4235 assert(entity->kind == ENTITY_VARIABLE);
4236 assert(entity->variable.initializer == NULL);
4238 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4239 entity->variable.v.vla_base = NULL;
4241 /* TODO: record VLA somewhere so we create the free node when we leave
4245 static void allocate_variable_length_array(entity_t *entity)
4247 assert(entity->kind == ENTITY_VARIABLE);
4248 assert(entity->variable.initializer == NULL);
4249 assert(currently_reachable());
4251 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4252 type_t *type = entity->declaration.type;
4253 ir_type *el_type = get_ir_type(type->array.element_type);
4255 /* make sure size_node is calculated */
4256 get_type_size_node(type);
4257 ir_node *elems = type->array.size_node;
4258 ir_node *mem = get_store();
4259 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4261 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4262 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4265 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4266 entity->variable.v.vla_base = addr;
4270 * Creates a Firm local variable from a declaration.
4272 static void create_local_variable(entity_t *entity)
4274 assert(entity->kind == ENTITY_VARIABLE);
4275 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4277 bool needs_entity = entity->variable.address_taken;
4278 type_t *type = skip_typeref(entity->declaration.type);
4280 /* is it a variable length array? */
4281 if (is_type_array(type) && !type->array.size_constant) {
4282 create_variable_length_array(entity);
4284 } else if (is_type_array(type) || is_type_compound(type)) {
4285 needs_entity = true;
4286 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4287 needs_entity = true;
4291 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4292 create_variable_entity(entity,
4293 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4296 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4297 entity->variable.v.value_number = next_value_number_function;
4298 set_irg_loc_description(current_ir_graph, next_value_number_function,
4300 ++next_value_number_function;
4304 static void create_local_static_variable(entity_t *entity)
4306 assert(entity->kind == ENTITY_VARIABLE);
4307 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4309 type_t *type = skip_typeref(entity->declaration.type);
4310 ir_type *const var_type = entity->variable.thread_local ?
4311 get_tls_type() : get_glob_type();
4312 ir_type *const irtype = get_ir_type(type);
4313 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4315 size_t l = strlen(entity->base.symbol->string);
4316 char buf[l + sizeof(".%u")];
4317 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4318 ident *const id = id_unique(buf);
4319 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4321 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4322 set_entity_volatility(irentity, volatility_is_volatile);
4325 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4326 entity->variable.v.entity = irentity;
4328 set_entity_ld_ident(irentity, id);
4329 set_entity_visibility(irentity, ir_visibility_local);
4331 if (entity->variable.initializer == NULL) {
4332 ir_initializer_t *null_init = get_initializer_null();
4333 set_entity_initializer(irentity, null_init);
4336 ir_graph *const old_current_ir_graph = current_ir_graph;
4337 current_ir_graph = get_const_code_irg();
4339 create_variable_initializer(entity);
4341 assert(current_ir_graph == get_const_code_irg());
4342 current_ir_graph = old_current_ir_graph;
4347 static ir_node *return_statement_to_firm(return_statement_t *statement)
4349 if (!currently_reachable())
4352 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4353 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4354 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4357 if (!is_type_void(type)) {
4358 ir_mode *const mode = get_ir_mode_storage(type);
4360 res = create_conv(dbgi, res, mode);
4361 res = do_strict_conv(dbgi, res);
4363 res = new_Unknown(mode);
4370 ir_node *const in[1] = { res };
4371 ir_node *const store = get_store();
4372 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4374 ir_node *end_block = get_irg_end_block(current_ir_graph);
4375 add_immBlock_pred(end_block, ret);
4377 set_unreachable_now();
4381 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4383 if (!currently_reachable())
4386 return expression_to_firm(statement->expression);
4389 static void create_local_declarations(entity_t*);
4391 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4393 create_local_declarations(compound->scope.entities);
4395 ir_node *result = NULL;
4396 statement_t *statement = compound->statements;
4397 for ( ; statement != NULL; statement = statement->base.next) {
4398 result = statement_to_firm(statement);
4404 static void create_global_variable(entity_t *entity)
4406 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4407 ir_visibility visibility = ir_visibility_external;
4408 storage_class_tag_t storage
4409 = (storage_class_tag_t)entity->declaration.storage_class;
4410 decl_modifiers_t modifiers = entity->declaration.modifiers;
4411 assert(entity->kind == ENTITY_VARIABLE);
4414 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4415 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4416 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4417 case STORAGE_CLASS_TYPEDEF:
4418 case STORAGE_CLASS_AUTO:
4419 case STORAGE_CLASS_REGISTER:
4420 panic("invalid storage class for global var");
4423 /* "common" symbols */
4424 if (storage == STORAGE_CLASS_NONE
4425 && entity->variable.initializer == NULL
4426 && !entity->variable.thread_local
4427 && (modifiers & DM_WEAK) == 0) {
4428 linkage |= IR_LINKAGE_MERGE;
4431 ir_type *var_type = get_glob_type();
4432 if (entity->variable.thread_local) {
4433 var_type = get_tls_type();
4435 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4436 ir_entity *irentity = entity->variable.v.entity;
4437 add_entity_linkage(irentity, linkage);
4438 set_entity_visibility(irentity, visibility);
4439 if (entity->variable.initializer == NULL
4440 && storage != STORAGE_CLASS_EXTERN) {
4441 ir_initializer_t *null_init = get_initializer_null();
4442 set_entity_initializer(irentity, null_init);
4446 static void create_local_declaration(entity_t *entity)
4448 assert(is_declaration(entity));
4450 /* construct type */
4451 (void) get_ir_type(entity->declaration.type);
4452 if (entity->base.symbol == NULL) {
4456 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4457 case STORAGE_CLASS_STATIC:
4458 if (entity->kind == ENTITY_FUNCTION) {
4459 (void)get_function_entity(entity, NULL);
4461 create_local_static_variable(entity);
4464 case STORAGE_CLASS_EXTERN:
4465 if (entity->kind == ENTITY_FUNCTION) {
4466 assert(entity->function.statement == NULL);
4467 (void)get_function_entity(entity, NULL);
4469 create_global_variable(entity);
4470 create_variable_initializer(entity);
4473 case STORAGE_CLASS_NONE:
4474 case STORAGE_CLASS_AUTO:
4475 case STORAGE_CLASS_REGISTER:
4476 if (entity->kind == ENTITY_FUNCTION) {
4477 if (entity->function.statement != NULL) {
4478 ir_type *owner = get_irg_frame_type(current_ir_graph);
4479 (void)get_function_entity(entity, owner);
4480 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4481 enqueue_inner_function(entity);
4483 (void)get_function_entity(entity, NULL);
4486 create_local_variable(entity);
4489 case STORAGE_CLASS_TYPEDEF:
4492 panic("invalid storage class found");
4495 static void create_local_declarations(entity_t *e)
4497 for (; e; e = e->base.next) {
4498 if (is_declaration(e))
4499 create_local_declaration(e);
4503 static void initialize_local_declaration(entity_t *entity)
4505 if (entity->base.symbol == NULL)
4508 // no need to emit code in dead blocks
4509 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4510 && !currently_reachable())
4513 switch ((declaration_kind_t) entity->declaration.kind) {
4514 case DECLARATION_KIND_LOCAL_VARIABLE:
4515 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4516 create_variable_initializer(entity);
4519 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4520 allocate_variable_length_array(entity);
4523 case DECLARATION_KIND_COMPOUND_MEMBER:
4524 case DECLARATION_KIND_GLOBAL_VARIABLE:
4525 case DECLARATION_KIND_FUNCTION:
4526 case DECLARATION_KIND_INNER_FUNCTION:
4529 case DECLARATION_KIND_PARAMETER:
4530 case DECLARATION_KIND_PARAMETER_ENTITY:
4531 panic("can't initialize parameters");
4533 case DECLARATION_KIND_UNKNOWN:
4534 panic("can't initialize unknown declaration");
4536 panic("invalid declaration kind");
4539 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4541 entity_t *entity = statement->declarations_begin;
4545 entity_t *const last = statement->declarations_end;
4546 for ( ;; entity = entity->base.next) {
4547 if (is_declaration(entity)) {
4548 initialize_local_declaration(entity);
4549 } else if (entity->kind == ENTITY_TYPEDEF) {
4550 /* ยง6.7.7:3 Any array size expressions associated with variable length
4551 * array declarators are evaluated each time the declaration of the
4552 * typedef name is reached in the order of execution. */
4553 type_t *const type = skip_typeref(entity->typedefe.type);
4554 if (is_type_array(type) && type->array.is_vla)
4555 get_vla_size(&type->array);
4564 static ir_node *if_statement_to_firm(if_statement_t *statement)
4566 create_local_declarations(statement->scope.entities);
4568 /* Create the condition. */
4569 ir_node *true_block = NULL;
4570 ir_node *false_block = NULL;
4571 if (currently_reachable()) {
4572 true_block = new_immBlock();
4573 false_block = new_immBlock();
4574 create_condition_evaluation(statement->condition, true_block, false_block);
4575 mature_immBlock(true_block);
4576 mature_immBlock(false_block);
4579 /* Create the true statement. */
4580 set_cur_block(true_block);
4581 statement_to_firm(statement->true_statement);
4582 ir_node *fallthrough_block = get_cur_block();
4584 /* Create the false statement. */
4585 set_cur_block(false_block);
4586 if (statement->false_statement != NULL) {
4587 statement_to_firm(statement->false_statement);
4590 /* Handle the block after the if-statement. Minor simplification and
4591 * optimisation: Reuse the false/true block as fallthrough block, if the
4592 * true/false statement does not pass control to the fallthrough block, e.g.
4593 * in the typical if (x) return; pattern. */
4594 if (fallthrough_block) {
4595 if (currently_reachable()) {
4596 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4597 ir_node *const f_jump = new_Jmp();
4598 ir_node *const in[] = { t_jump, f_jump };
4599 fallthrough_block = new_Block(2, in);
4601 set_cur_block(fallthrough_block);
4608 * Add an unconditional jump to the target block. If the source block is not
4609 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4610 * loops. This is necessary if the jump potentially enters a loop.
4612 static void jump_to(ir_node *const target_block)
4614 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4615 add_immBlock_pred(target_block, pred);
4619 * Add an unconditional jump to the target block, if the current block is
4620 * reachable and do nothing otherwise. This is only valid if the jump does not
4621 * enter a loop (a back edge is ok).
4623 static void jump_if_reachable(ir_node *const target_block)
4625 if (currently_reachable())
4626 add_immBlock_pred(target_block, new_Jmp());
4629 static ir_node *while_statement_to_firm(while_statement_t *statement)
4631 create_local_declarations(statement->scope.entities);
4633 /* Create the header block */
4634 ir_node *const header_block = new_immBlock();
4635 jump_to(header_block);
4637 /* Create the condition. */
4638 ir_node * body_block;
4639 ir_node * false_block;
4640 expression_t *const cond = statement->condition;
4641 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4642 fold_constant_to_bool(cond)) {
4643 /* Shortcut for while (true). */
4644 body_block = header_block;
4647 keep_alive(header_block);
4648 keep_all_memory(header_block);
4650 body_block = new_immBlock();
4651 false_block = new_immBlock();
4653 set_cur_block(header_block);
4654 create_condition_evaluation(cond, body_block, false_block);
4655 mature_immBlock(body_block);
4658 ir_node *const old_continue_label = continue_label;
4659 ir_node *const old_break_label = break_label;
4660 continue_label = header_block;
4661 break_label = false_block;
4663 /* Create the loop body. */
4664 set_cur_block(body_block);
4665 statement_to_firm(statement->body);
4666 jump_if_reachable(header_block);
4668 mature_immBlock(header_block);
4669 assert(false_block == NULL || false_block == break_label);
4670 false_block = break_label;
4671 if (false_block != NULL) {
4672 mature_immBlock(false_block);
4674 set_cur_block(false_block);
4676 assert(continue_label == header_block);
4677 continue_label = old_continue_label;
4678 break_label = old_break_label;
4682 static ir_node *get_break_label(void)
4684 if (break_label == NULL) {
4685 break_label = new_immBlock();
4690 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4692 create_local_declarations(statement->scope.entities);
4694 /* create the header block */
4695 ir_node *header_block = new_immBlock();
4698 ir_node *body_block = new_immBlock();
4699 jump_to(body_block);
4701 ir_node *old_continue_label = continue_label;
4702 ir_node *old_break_label = break_label;
4703 continue_label = header_block;
4706 set_cur_block(body_block);
4707 statement_to_firm(statement->body);
4708 ir_node *const false_block = get_break_label();
4710 assert(continue_label == header_block);
4711 continue_label = old_continue_label;
4712 break_label = old_break_label;
4714 jump_if_reachable(header_block);
4716 /* create the condition */
4717 mature_immBlock(header_block);
4718 set_cur_block(header_block);
4720 create_condition_evaluation(statement->condition, body_block, false_block);
4721 mature_immBlock(body_block);
4722 mature_immBlock(false_block);
4724 set_cur_block(false_block);
4728 static ir_node *for_statement_to_firm(for_statement_t *statement)
4730 create_local_declarations(statement->scope.entities);
4732 if (currently_reachable()) {
4733 entity_t *entity = statement->scope.entities;
4734 for ( ; entity != NULL; entity = entity->base.next) {
4735 if (!is_declaration(entity))
4738 initialize_local_declaration(entity);
4741 if (statement->initialisation != NULL) {
4742 expression_to_firm(statement->initialisation);
4746 /* Create the header block */
4747 ir_node *const header_block = new_immBlock();
4748 jump_to(header_block);
4750 /* Create the condition. */
4751 ir_node *body_block;
4752 ir_node *false_block;
4753 if (statement->condition != NULL) {
4754 body_block = new_immBlock();
4755 false_block = new_immBlock();
4757 set_cur_block(header_block);
4758 create_condition_evaluation(statement->condition, body_block, false_block);
4759 mature_immBlock(body_block);
4762 body_block = header_block;
4765 keep_alive(header_block);
4766 keep_all_memory(header_block);
4769 /* Create the step block, if necessary. */
4770 ir_node * step_block = header_block;
4771 expression_t *const step = statement->step;
4773 step_block = new_immBlock();
4776 ir_node *const old_continue_label = continue_label;
4777 ir_node *const old_break_label = break_label;
4778 continue_label = step_block;
4779 break_label = false_block;
4781 /* Create the loop body. */
4782 set_cur_block(body_block);
4783 statement_to_firm(statement->body);
4784 jump_if_reachable(step_block);
4786 /* Create the step code. */
4788 mature_immBlock(step_block);
4789 set_cur_block(step_block);
4790 expression_to_firm(step);
4791 jump_if_reachable(header_block);
4794 mature_immBlock(header_block);
4795 assert(false_block == NULL || false_block == break_label);
4796 false_block = break_label;
4797 if (false_block != NULL) {
4798 mature_immBlock(false_block);
4800 set_cur_block(false_block);
4802 assert(continue_label == step_block);
4803 continue_label = old_continue_label;
4804 break_label = old_break_label;
4808 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4810 if (!currently_reachable())
4813 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4814 ir_node *jump = new_d_Jmp(dbgi);
4815 add_immBlock_pred(target_block, jump);
4817 set_unreachable_now();
4821 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4823 /* determine number of cases */
4825 for (case_label_statement_t *l = statement->first_case; l != NULL;
4828 if (l->expression == NULL)
4830 if (l->is_empty_range)
4835 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4837 for (case_label_statement_t *l = statement->first_case; l != NULL;
4839 if (l->expression == NULL) {
4840 l->pn = pn_Switch_default;
4843 if (l->is_empty_range)
4845 ir_tarval *min = fold_constant_to_tarval(l->expression);
4846 ir_tarval *max = min;
4847 long pn = (long) i+1;
4848 if (l->end_range != NULL)
4849 max = fold_constant_to_tarval(l->end_range);
4850 ir_switch_table_set(res, i++, min, max, pn);
4856 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4858 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4859 ir_node *switch_node = NULL;
4861 if (currently_reachable()) {
4862 ir_node *expression = expression_to_firm(statement->expression);
4863 ir_switch_table *table = create_switch_table(statement);
4864 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4866 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4869 set_unreachable_now();
4871 ir_node *const old_switch = current_switch;
4872 ir_node *const old_break_label = break_label;
4873 const bool old_saw_default_label = saw_default_label;
4874 saw_default_label = false;
4875 current_switch = switch_node;
4878 statement_to_firm(statement->body);
4880 if (currently_reachable()) {
4881 add_immBlock_pred(get_break_label(), new_Jmp());
4884 if (!saw_default_label && switch_node) {
4885 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4886 add_immBlock_pred(get_break_label(), proj);
4889 if (break_label != NULL) {
4890 mature_immBlock(break_label);
4892 set_cur_block(break_label);
4894 assert(current_switch == switch_node);
4895 current_switch = old_switch;
4896 break_label = old_break_label;
4897 saw_default_label = old_saw_default_label;
4901 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4903 if (statement->is_empty_range)
4906 if (current_switch != NULL) {
4907 ir_node *block = new_immBlock();
4908 /* Fallthrough from previous case */
4909 jump_if_reachable(block);
4911 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4912 add_immBlock_pred(block, proj);
4913 if (statement->expression == NULL)
4914 saw_default_label = true;
4916 mature_immBlock(block);
4917 set_cur_block(block);
4920 return statement_to_firm(statement->statement);
4923 static ir_node *label_to_firm(const label_statement_t *statement)
4925 ir_node *block = get_label_block(statement->label);
4928 set_cur_block(block);
4930 keep_all_memory(block);
4932 return statement_to_firm(statement->statement);
4935 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4937 if (!currently_reachable())
4940 ir_node *const irn = expression_to_firm(statement->expression);
4941 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4942 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
4944 set_irn_link(ijmp, ijmp_list);
4947 set_unreachable_now();
4951 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4953 bool needs_memory = false;
4955 if (statement->is_volatile) {
4956 needs_memory = true;
4959 size_t n_clobbers = 0;
4960 asm_clobber_t *clobber = statement->clobbers;
4961 for ( ; clobber != NULL; clobber = clobber->next) {
4962 const char *clobber_str = clobber->clobber.begin;
4964 if (!be_is_valid_clobber(clobber_str)) {
4965 errorf(&statement->base.source_position,
4966 "invalid clobber '%s' specified", clobber->clobber);
4970 if (streq(clobber_str, "memory")) {
4971 needs_memory = true;
4975 ident *id = new_id_from_str(clobber_str);
4976 obstack_ptr_grow(&asm_obst, id);
4979 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4980 ident **clobbers = NULL;
4981 if (n_clobbers > 0) {
4982 clobbers = obstack_finish(&asm_obst);
4985 size_t n_inputs = 0;
4986 asm_argument_t *argument = statement->inputs;
4987 for ( ; argument != NULL; argument = argument->next)
4989 size_t n_outputs = 0;
4990 argument = statement->outputs;
4991 for ( ; argument != NULL; argument = argument->next)
4994 unsigned next_pos = 0;
4996 ir_node *ins[n_inputs + n_outputs + 1];
4999 ir_asm_constraint tmp_in_constraints[n_outputs];
5001 const expression_t *out_exprs[n_outputs];
5002 ir_node *out_addrs[n_outputs];
5003 size_t out_size = 0;
5005 argument = statement->outputs;
5006 for ( ; argument != NULL; argument = argument->next) {
5007 const char *constraints = argument->constraints.begin;
5008 asm_constraint_flags_t asm_flags
5009 = be_parse_asm_constraints(constraints);
5012 source_position_t const *const pos = &statement->base.source_position;
5013 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5014 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5016 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5017 errorf(pos, "some constraints in '%s' are invalid", constraints);
5020 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5021 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5026 unsigned pos = next_pos++;
5027 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5028 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5029 expression_t *expr = argument->expression;
5030 ir_node *addr = expression_to_addr(expr);
5031 /* in+output, construct an artifical same_as constraint on the
5033 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5035 ir_node *value = get_value_from_lvalue(expr, addr);
5037 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5039 ir_asm_constraint constraint;
5040 constraint.pos = pos;
5041 constraint.constraint = new_id_from_str(buf);
5042 constraint.mode = get_ir_mode_storage(expr->base.type);
5043 tmp_in_constraints[in_size] = constraint;
5044 ins[in_size] = value;
5049 out_exprs[out_size] = expr;
5050 out_addrs[out_size] = addr;
5052 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5053 /* pure memory ops need no input (but we have to make sure we
5054 * attach to the memory) */
5055 assert(! (asm_flags &
5056 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5057 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5058 needs_memory = true;
5060 /* we need to attach the address to the inputs */
5061 expression_t *expr = argument->expression;
5063 ir_asm_constraint constraint;
5064 constraint.pos = pos;
5065 constraint.constraint = new_id_from_str(constraints);
5066 constraint.mode = mode_M;
5067 tmp_in_constraints[in_size] = constraint;
5069 ins[in_size] = expression_to_addr(expr);
5073 errorf(&statement->base.source_position,
5074 "only modifiers but no place set in constraints '%s'",
5079 ir_asm_constraint constraint;
5080 constraint.pos = pos;
5081 constraint.constraint = new_id_from_str(constraints);
5082 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5084 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5086 assert(obstack_object_size(&asm_obst)
5087 == out_size * sizeof(ir_asm_constraint));
5088 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5091 obstack_grow(&asm_obst, tmp_in_constraints,
5092 in_size * sizeof(tmp_in_constraints[0]));
5093 /* find and count input and output arguments */
5094 argument = statement->inputs;
5095 for ( ; argument != NULL; argument = argument->next) {
5096 const char *constraints = argument->constraints.begin;
5097 asm_constraint_flags_t asm_flags
5098 = be_parse_asm_constraints(constraints);
5100 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5101 errorf(&statement->base.source_position,
5102 "some constraints in '%s' are not supported", constraints);
5105 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5106 errorf(&statement->base.source_position,
5107 "some constraints in '%s' are invalid", constraints);
5110 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5111 errorf(&statement->base.source_position,
5112 "write flag specified for input constraints '%s'",
5118 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5119 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5120 /* we can treat this as "normal" input */
5121 input = expression_to_firm(argument->expression);
5122 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5123 /* pure memory ops need no input (but we have to make sure we
5124 * attach to the memory) */
5125 assert(! (asm_flags &
5126 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5127 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5128 needs_memory = true;
5129 input = expression_to_addr(argument->expression);
5131 errorf(&statement->base.source_position,
5132 "only modifiers but no place set in constraints '%s'",
5137 ir_asm_constraint constraint;
5138 constraint.pos = next_pos++;
5139 constraint.constraint = new_id_from_str(constraints);
5140 constraint.mode = get_irn_mode(input);
5142 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5143 ins[in_size++] = input;
5147 ir_asm_constraint constraint;
5148 constraint.pos = next_pos++;
5149 constraint.constraint = new_id_from_str("");
5150 constraint.mode = mode_M;
5152 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5153 ins[in_size++] = get_store();
5156 assert(obstack_object_size(&asm_obst)
5157 == in_size * sizeof(ir_asm_constraint));
5158 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5160 /* create asm node */
5161 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5163 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5165 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5166 out_size, output_constraints,
5167 n_clobbers, clobbers, asm_text);
5169 if (statement->is_volatile) {
5170 set_irn_pinned(node, op_pin_state_pinned);
5172 set_irn_pinned(node, op_pin_state_floats);
5175 /* create output projs & connect them */
5177 ir_node *projm = new_Proj(node, mode_M, out_size);
5182 for (i = 0; i < out_size; ++i) {
5183 const expression_t *out_expr = out_exprs[i];
5185 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5186 ir_node *proj = new_Proj(node, mode, pn);
5187 ir_node *addr = out_addrs[i];
5189 set_value_for_expression_addr(out_expr, proj, addr);
5195 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5197 statement_to_firm(statement->try_statement);
5198 source_position_t const *const pos = &statement->base.source_position;
5199 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5203 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5205 errorf(&statement->base.source_position, "__leave not supported yet");
5210 * Transform a statement.
5212 static ir_node *statement_to_firm(statement_t *const stmt)
5215 assert(!stmt->base.transformed);
5216 stmt->base.transformed = true;
5219 switch (stmt->kind) {
5220 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5221 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5222 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5223 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5224 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5225 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5226 case STATEMENT_EMPTY: return NULL; /* nothing */
5227 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5228 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5229 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5230 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5231 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5232 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5233 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5234 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5235 case STATEMENT_WHILE: return while_statement_to_firm( &stmt->whiles);
5237 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5238 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5239 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5241 case STATEMENT_ERROR: panic("error statement found");
5243 panic("statement not implemented");
5246 static int count_local_variables(const entity_t *entity,
5247 const entity_t *const last)
5250 entity_t const *const end = last != NULL ? last->base.next : NULL;
5251 for (; entity != end; entity = entity->base.next) {
5252 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5253 !entity->variable.address_taken &&
5254 is_type_scalar(skip_typeref(entity->declaration.type)))
5260 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5262 int *const count = env;
5264 switch (stmt->kind) {
5265 case STATEMENT_DECLARATION: {
5266 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5267 *count += count_local_variables(decl_stmt->declarations_begin,
5268 decl_stmt->declarations_end);
5273 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5282 * Return the number of local (alias free) variables used by a function.
5284 static int get_function_n_local_vars(entity_t *entity)
5286 const function_t *function = &entity->function;
5289 /* count parameters */
5290 count += count_local_variables(function->parameters.entities, NULL);
5292 /* count local variables declared in body */
5293 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5298 * Build Firm code for the parameters of a function.
5300 static void initialize_function_parameters(entity_t *entity)
5302 assert(entity->kind == ENTITY_FUNCTION);
5303 ir_graph *irg = current_ir_graph;
5304 ir_node *args = get_irg_args(irg);
5306 ir_type *function_irtype;
5308 if (entity->function.need_closure) {
5309 /* add an extra parameter for the static link */
5310 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5313 /* Matze: IMO this is wrong, nested functions should have an own
5314 * type and not rely on strange parameters... */
5315 function_irtype = create_method_type(&entity->declaration.type->function, true);
5317 function_irtype = get_ir_type(entity->declaration.type);
5322 entity_t *parameter = entity->function.parameters.entities;
5323 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5324 if (parameter->kind != ENTITY_PARAMETER)
5327 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5328 type_t *type = skip_typeref(parameter->declaration.type);
5330 assert(!is_type_array(type));
5331 bool const needs_entity = parameter->variable.address_taken || is_type_compound(type);
5333 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5335 ir_type *frame_type = get_irg_frame_type(irg);
5337 = new_parameter_entity(frame_type, n, param_irtype);
5338 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5339 parameter->variable.v.entity = param;
5343 ir_mode *param_mode = get_type_mode(param_irtype);
5345 ir_node *value = new_r_Proj(args, param_mode, pn);
5347 ir_mode *mode = get_ir_mode_storage(type);
5348 value = create_conv(NULL, value, mode);
5349 value = do_strict_conv(NULL, value);
5351 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5352 parameter->variable.v.value_number = next_value_number_function;
5353 set_irg_loc_description(current_ir_graph, next_value_number_function,
5355 ++next_value_number_function;
5357 set_value(parameter->variable.v.value_number, value);
5362 * Handle additional decl modifiers for IR-graphs
5364 * @param irg the IR-graph
5365 * @param dec_modifiers additional modifiers
5367 static void handle_decl_modifier_irg(ir_graph *irg,
5368 decl_modifiers_t decl_modifiers)
5370 if (decl_modifiers & DM_NAKED) {
5371 /* TRUE if the declaration includes the Microsoft
5372 __declspec(naked) specifier. */
5373 add_irg_additional_properties(irg, mtp_property_naked);
5375 if (decl_modifiers & DM_FORCEINLINE) {
5376 /* TRUE if the declaration includes the
5377 Microsoft __forceinline specifier. */
5378 set_irg_inline_property(irg, irg_inline_forced);
5380 if (decl_modifiers & DM_NOINLINE) {
5381 /* TRUE if the declaration includes the Microsoft
5382 __declspec(noinline) specifier. */
5383 set_irg_inline_property(irg, irg_inline_forbidden);
5387 static void add_function_pointer(ir_type *segment, ir_entity *method,
5388 const char *unique_template)
5390 ir_type *method_type = get_entity_type(method);
5391 ir_type *ptr_type = new_type_pointer(method_type);
5393 /* these entities don't really have a name but firm only allows
5395 * Note that we mustn't give these entities a name since for example
5396 * Mach-O doesn't allow them. */
5397 ident *ide = id_unique(unique_template);
5398 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5399 ir_graph *irg = get_const_code_irg();
5400 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5403 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5404 set_entity_compiler_generated(ptr, 1);
5405 set_entity_visibility(ptr, ir_visibility_private);
5406 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5407 set_atomic_ent_value(ptr, val);
5411 * Generate possible IJmp branches to a given label block.
5413 static void gen_ijmp_branches(ir_node *block)
5416 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5417 add_immBlock_pred(block, ijmp);
5422 * Create code for a function and all inner functions.
5424 * @param entity the function entity
5426 static void create_function(entity_t *entity)
5428 assert(entity->kind == ENTITY_FUNCTION);
5429 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5431 if (entity->function.statement == NULL)
5434 inner_functions = NULL;
5435 current_trampolines = NULL;
5437 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5438 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5439 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5441 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5442 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5443 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5446 current_function_entity = entity;
5447 current_function_name = NULL;
5448 current_funcsig = NULL;
5450 assert(all_labels == NULL);
5451 all_labels = NEW_ARR_F(label_t *, 0);
5454 int n_local_vars = get_function_n_local_vars(entity);
5455 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5456 current_ir_graph = irg;
5458 ir_graph *old_current_function = current_function;
5459 current_function = irg;
5461 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5462 current_vararg_entity = NULL;
5464 set_irg_fp_model(irg, firm_fp_model);
5465 tarval_enable_fp_ops(1);
5466 set_irn_dbg_info(get_irg_start_block(irg),
5467 get_entity_dbg_info(function_entity));
5469 /* set inline flags */
5470 if (entity->function.is_inline)
5471 set_irg_inline_property(irg, irg_inline_recomended);
5472 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5474 next_value_number_function = 0;
5475 initialize_function_parameters(entity);
5476 current_static_link = entity->function.static_link;
5478 statement_to_firm(entity->function.statement);
5480 ir_node *end_block = get_irg_end_block(irg);
5482 /* do we have a return statement yet? */
5483 if (currently_reachable()) {
5484 type_t *type = skip_typeref(entity->declaration.type);
5485 assert(is_type_function(type));
5486 type_t *const return_type = skip_typeref(type->function.return_type);
5489 if (is_type_void(return_type)) {
5490 ret = new_Return(get_store(), 0, NULL);
5492 ir_mode *const mode = get_ir_mode_storage(return_type);
5495 /* ยง5.1.2.2.3 main implicitly returns 0 */
5496 if (is_main(entity)) {
5497 in[0] = new_Const(get_mode_null(mode));
5499 in[0] = new_Unknown(mode);
5501 ret = new_Return(get_store(), 1, in);
5503 add_immBlock_pred(end_block, ret);
5506 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5507 label_t *label = all_labels[i];
5508 if (label->address_taken) {
5509 gen_ijmp_branches(label->block);
5511 mature_immBlock(label->block);
5514 DEL_ARR_F(all_labels);
5517 irg_finalize_cons(irg);
5519 /* finalize the frame type */
5520 ir_type *frame_type = get_irg_frame_type(irg);
5521 int n = get_compound_n_members(frame_type);
5524 for (int i = 0; i < n; ++i) {
5525 ir_entity *member = get_compound_member(frame_type, i);
5526 ir_type *entity_type = get_entity_type(member);
5528 int align = get_type_alignment_bytes(entity_type);
5529 if (align > align_all)
5533 misalign = offset % align;
5535 offset += align - misalign;
5539 set_entity_offset(member, offset);
5540 offset += get_type_size_bytes(entity_type);
5542 set_type_size_bytes(frame_type, offset);
5543 set_type_alignment_bytes(frame_type, align_all);
5545 irg_verify(irg, VERIFY_ENFORCE_SSA);
5546 current_vararg_entity = old_current_vararg_entity;
5547 current_function = old_current_function;
5549 if (current_trampolines != NULL) {
5550 DEL_ARR_F(current_trampolines);
5551 current_trampolines = NULL;
5554 /* create inner functions if any */
5555 entity_t **inner = inner_functions;
5556 if (inner != NULL) {
5557 ir_type *rem_outer_frame = current_outer_frame;
5558 current_outer_frame = get_irg_frame_type(current_ir_graph);
5559 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5560 create_function(inner[i]);
5564 current_outer_frame = rem_outer_frame;
5568 static void scope_to_firm(scope_t *scope)
5570 /* first pass: create declarations */
5571 entity_t *entity = scope->entities;
5572 for ( ; entity != NULL; entity = entity->base.next) {
5573 if (entity->base.symbol == NULL)
5576 if (entity->kind == ENTITY_FUNCTION) {
5577 if (entity->function.btk != BUILTIN_NONE) {
5578 /* builtins have no representation */
5581 (void)get_function_entity(entity, NULL);
5582 } else if (entity->kind == ENTITY_VARIABLE) {
5583 create_global_variable(entity);
5584 } else if (entity->kind == ENTITY_NAMESPACE) {
5585 scope_to_firm(&entity->namespacee.members);
5589 /* second pass: create code/initializers */
5590 entity = scope->entities;
5591 for ( ; entity != NULL; entity = entity->base.next) {
5592 if (entity->base.symbol == NULL)
5595 if (entity->kind == ENTITY_FUNCTION) {
5596 if (entity->function.btk != BUILTIN_NONE) {
5597 /* builtins have no representation */
5600 create_function(entity);
5601 } else if (entity->kind == ENTITY_VARIABLE) {
5602 assert(entity->declaration.kind
5603 == DECLARATION_KIND_GLOBAL_VARIABLE);
5604 current_ir_graph = get_const_code_irg();
5605 create_variable_initializer(entity);
5610 void init_ast2firm(void)
5612 obstack_init(&asm_obst);
5613 init_atomic_modes();
5615 ir_set_debug_retrieve(dbg_retrieve);
5616 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5618 /* create idents for all known runtime functions */
5619 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5620 rts_idents[i] = new_id_from_str(rts_data[i].name);
5623 entitymap_init(&entitymap);
5626 static void init_ir_types(void)
5628 static int ir_types_initialized = 0;
5629 if (ir_types_initialized)
5631 ir_types_initialized = 1;
5633 ir_type_char = get_ir_type(type_char);
5634 ir_type_wchar_t = get_ir_type(type_wchar_t);
5636 be_params = be_get_backend_param();
5637 mode_float_arithmetic = be_params->mode_float_arithmetic;
5639 stack_param_align = be_params->stack_param_align;
5642 void exit_ast2firm(void)
5644 entitymap_destroy(&entitymap);
5645 obstack_free(&asm_obst, NULL);
5648 static void global_asm_to_firm(statement_t *s)
5650 for (; s != NULL; s = s->base.next) {
5651 assert(s->kind == STATEMENT_ASM);
5653 char const *const text = s->asms.asm_text.begin;
5654 size_t size = s->asms.asm_text.size;
5656 /* skip the last \0 */
5657 if (text[size - 1] == '\0')
5660 ident *const id = new_id_from_chars(text, size);
5665 static const char *get_cwd(void)
5667 static char buf[1024];
5669 getcwd(buf, sizeof(buf));
5673 void translation_unit_to_firm(translation_unit_t *unit)
5675 if (c_mode & _CXX) {
5676 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5677 } else if (c_mode & _C99) {
5678 be_dwarf_set_source_language(DW_LANG_C99);
5679 } else if (c_mode & _C89) {
5680 be_dwarf_set_source_language(DW_LANG_C89);
5682 be_dwarf_set_source_language(DW_LANG_C);
5684 be_dwarf_set_compilation_directory(get_cwd());
5686 /* initialize firm arithmetic */
5687 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5688 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5690 /* just to be sure */
5691 continue_label = NULL;
5693 current_switch = NULL;
5694 current_translation_unit = unit;
5698 scope_to_firm(&unit->scope);
5699 global_asm_to_firm(unit->global_asm);
5701 current_ir_graph = NULL;
5702 current_translation_unit = NULL;