2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
44 #include "diagnostic.h"
45 #include "lang_features.h"
47 #include "type_hash.h"
52 #include "entitymap_t.h"
53 #include "driver/firm_opt.h"
55 typedef struct trampoline_region trampoline_region;
56 struct trampoline_region {
57 ir_entity *function; /**< The function that is called by this trampoline */
58 ir_entity *region; /**< created region for the trampoline */
61 fp_model_t firm_fp_model = fp_model_precise;
63 static const backend_params *be_params;
65 static ir_type *ir_type_char;
66 static ir_type *ir_type_const_char;
67 static ir_type *ir_type_wchar_t;
69 /* architecture specific floating point arithmetic mode (if any) */
70 static ir_mode *mode_float_arithmetic;
72 /* alignment of stack parameters */
73 static unsigned stack_param_align;
75 static int next_value_number_function;
76 static ir_node *continue_label;
77 static ir_node *break_label;
78 static ir_node *current_switch;
79 static bool saw_default_label;
80 static label_t **all_labels;
81 static entity_t **inner_functions;
82 static ir_node *ijmp_list;
83 static bool constant_folding;
85 static const entity_t *current_function_entity;
86 static ir_node *current_function_name;
87 static ir_node *current_funcsig;
88 static ir_graph *current_function;
89 static translation_unit_t *current_translation_unit;
90 static trampoline_region *current_trampolines;
91 static ir_type *current_outer_frame;
92 static ir_node *current_static_link;
93 static ir_entity *current_vararg_entity;
95 static entitymap_t entitymap;
97 static struct obstack asm_obst;
99 typedef enum declaration_kind_t {
100 DECLARATION_KIND_UNKNOWN,
101 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
102 DECLARATION_KIND_GLOBAL_VARIABLE,
103 DECLARATION_KIND_LOCAL_VARIABLE,
104 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
105 DECLARATION_KIND_PARAMETER,
106 DECLARATION_KIND_PARAMETER_ENTITY,
107 DECLARATION_KIND_FUNCTION,
108 DECLARATION_KIND_COMPOUND_MEMBER,
109 DECLARATION_KIND_INNER_FUNCTION
110 } declaration_kind_t;
112 static ir_type *get_ir_type_incomplete(type_t *type);
114 static void enqueue_inner_function(entity_t *entity)
116 if (inner_functions == NULL)
117 inner_functions = NEW_ARR_F(entity_t *, 0);
118 ARR_APP1(entity_t*, inner_functions, entity);
121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
123 const entity_t *entity = get_irg_loc_description(irg, pos);
125 if (entity != NULL) {
126 source_position_t const *const pos = &entity->base.source_position;
127 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
129 return new_r_Unknown(irg, mode);
132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
134 source_position_t const *const pos = (source_position_t const*)dbg;
136 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
138 return (src_loc_t){ NULL, 0, 0 };
142 static dbg_info *get_dbg_info(const source_position_t *pos)
144 return (dbg_info*) pos;
147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
148 const type_dbg_info *dbg)
151 print_to_buffer(buffer, buffer_size);
152 const type_t *type = (const type_t*) dbg;
154 finish_print_to_buffer();
157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
159 return (type_dbg_info*) type;
162 /* is the current block a reachable one? */
163 static bool currently_reachable(void)
165 ir_node *const block = get_cur_block();
166 return block != NULL && !is_Bad(block);
169 static void set_unreachable_now(void)
174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
176 static ir_node *_expression_to_firm(const expression_t *expression);
177 static ir_node *expression_to_firm(const expression_t *expression);
178 static void create_local_declaration(entity_t *entity);
180 static unsigned decide_modulo_shift(unsigned type_size)
182 if (architecture_modulo_shift == 0)
184 if (type_size < architecture_modulo_shift)
185 return architecture_modulo_shift;
189 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
191 unsigned flags = get_atomic_type_flags(kind);
192 unsigned size = get_atomic_type_size(kind);
193 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
194 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
197 } else if (size == 8) {
200 panic("unexpected kind");
202 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
204 unsigned bit_size = size * 8;
205 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
206 unsigned modulo_shift = decide_modulo_shift(bit_size);
208 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
209 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
217 * Initialises the atomic modes depending on the machine size.
219 static void init_atomic_modes(void)
221 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
222 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
223 if (atomic_modes[i] != NULL)
225 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
229 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
231 assert(kind <= ATOMIC_TYPE_LAST);
232 return atomic_modes[kind];
235 static ir_node *get_vla_size(array_type_t *const type)
237 ir_node *size_node = type->size_node;
238 if (size_node == NULL) {
239 size_node = expression_to_firm(type->size_expression);
240 type->size_node = size_node;
245 static unsigned count_parameters(const function_type_t *function_type)
249 function_parameter_t *parameter = function_type->parameters;
250 for ( ; parameter != NULL; parameter = parameter->next) {
258 * Creates a Firm type for an atomic type
260 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
262 ir_mode *mode = atomic_modes[akind];
263 type_dbg_info *dbgi = get_type_dbg_info_(type);
264 ir_type *irtype = new_d_type_primitive(mode, dbgi);
265 il_alignment_t alignment = get_atomic_type_alignment(akind);
267 set_type_size_bytes(irtype, get_atomic_type_size(akind));
268 set_type_alignment_bytes(irtype, alignment);
274 * Creates a Firm type for a complex type
276 static ir_type *create_complex_type(const atomic_type_t *type)
278 atomic_type_kind_t kind = type->akind;
279 ir_mode *mode = atomic_modes[kind];
280 ident *id = get_mode_ident(mode);
284 /* FIXME: finish the array */
289 * Creates a Firm type for an imaginary type
291 static ir_type *create_imaginary_type(const atomic_type_t *type)
293 return create_atomic_type(type->akind, (const type_t*)type);
297 * return type of a parameter (and take transparent union gnu extension into
300 static type_t *get_parameter_type(type_t *orig_type)
302 type_t *type = skip_typeref(orig_type);
303 if (is_type_union(type)
304 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
305 compound_t *compound = type->compound.compound;
306 type = compound->members.entities->declaration.type;
312 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
314 type_t *return_type = skip_typeref(function_type->return_type);
316 int n_parameters = count_parameters(function_type)
317 + (for_closure ? 1 : 0);
318 int n_results = is_type_void(return_type) ? 0 : 1;
319 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
320 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
322 if (!is_type_void(return_type)) {
323 ir_type *restype = get_ir_type(return_type);
324 set_method_res_type(irtype, 0, restype);
327 function_parameter_t *parameter = function_type->parameters;
330 ir_type *p_irtype = get_ir_type(type_void_ptr);
331 set_method_param_type(irtype, n, p_irtype);
334 for ( ; parameter != NULL; parameter = parameter->next) {
335 type_t *type = get_parameter_type(parameter->type);
336 ir_type *p_irtype = get_ir_type(type);
337 set_method_param_type(irtype, n, p_irtype);
341 bool is_variadic = function_type->variadic;
344 set_method_variadicity(irtype, variadicity_variadic);
346 unsigned cc = get_method_calling_convention(irtype);
347 switch (function_type->calling_convention) {
348 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
351 set_method_calling_convention(irtype, SET_CDECL(cc));
358 /* only non-variadic function can use stdcall, else use cdecl */
359 set_method_calling_convention(irtype, SET_STDCALL(cc));
365 /* only non-variadic function can use fastcall, else use cdecl */
366 set_method_calling_convention(irtype, SET_FASTCALL(cc));
370 /* Hmm, leave default, not accepted by the parser yet. */
375 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
377 const decl_modifiers_t modifiers = function_type->modifiers;
378 if (modifiers & DM_CONST)
379 add_method_additional_properties(irtype, mtp_property_const);
380 if (modifiers & DM_PURE)
381 add_method_additional_properties(irtype, mtp_property_pure);
382 if (modifiers & DM_RETURNS_TWICE)
383 add_method_additional_properties(irtype, mtp_property_returns_twice);
384 if (modifiers & DM_NORETURN)
385 add_method_additional_properties(irtype, mtp_property_noreturn);
386 if (modifiers & DM_NOTHROW)
387 add_method_additional_properties(irtype, mtp_property_nothrow);
388 if (modifiers & DM_MALLOC)
389 add_method_additional_properties(irtype, mtp_property_malloc);
394 static ir_type *create_pointer_type(pointer_type_t *type)
396 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
397 type_t *points_to = type->points_to;
398 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
399 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
404 static ir_type *create_reference_type(reference_type_t *type)
406 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
407 type_t *refers_to = type->refers_to;
408 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
409 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
414 static ir_type *create_array_type(array_type_t *type)
416 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
417 type_t *element_type = type->element_type;
418 ir_type *ir_element_type = get_ir_type(element_type);
419 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
421 const int align = get_type_alignment_bytes(ir_element_type);
422 set_type_alignment_bytes(irtype, align);
424 if (type->size_constant) {
425 int n_elements = type->size;
427 set_array_bounds_int(irtype, 0, 0, n_elements);
429 size_t elemsize = get_type_size_bytes(ir_element_type);
430 if (elemsize % align > 0) {
431 elemsize += align - (elemsize % align);
433 set_type_size_bytes(irtype, n_elements * elemsize);
435 set_array_lower_bound_int(irtype, 0, 0);
437 set_type_state(irtype, layout_fixed);
443 * Return the signed integer type of size bits.
445 * @param size the size
447 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
451 static ir_mode *s_modes[64 + 1] = {NULL, };
455 if (size <= 0 || size > 64)
458 mode = s_modes[size];
462 snprintf(name, sizeof(name), "bf_I%u", size);
463 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
464 s_modes[size] = mode;
467 type_dbg_info *dbgi = get_type_dbg_info_(type);
468 res = new_d_type_primitive(mode, dbgi);
469 set_primitive_base_type(res, base_tp);
475 * Return the unsigned integer type of size bits.
477 * @param size the size
479 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
483 static ir_mode *u_modes[64 + 1] = {NULL, };
487 if (size <= 0 || size > 64)
490 mode = u_modes[size];
494 snprintf(name, sizeof(name), "bf_U%u", size);
495 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
496 u_modes[size] = mode;
499 type_dbg_info *dbgi = get_type_dbg_info_(type);
500 res = new_d_type_primitive(mode, dbgi);
501 set_primitive_base_type(res, base_tp);
506 static ir_type *create_bitfield_type(const entity_t *entity)
508 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
509 type_t *base = skip_typeref(entity->declaration.type);
510 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
511 ir_type *irbase = get_ir_type(base);
513 unsigned bit_size = entity->compound_member.bit_size;
515 assert(!is_type_float(base));
516 if (is_type_signed(base)) {
517 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
519 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
524 * Construct firm type from ast struct type.
526 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
528 compound_t *compound = type->compound;
530 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
531 return compound->irtype;
534 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
536 symbol_t *type_symbol = compound->base.symbol;
538 if (type_symbol != NULL) {
539 id = new_id_from_str(type_symbol->string);
542 id = id_unique("__anonymous_union.%u");
544 id = id_unique("__anonymous_struct.%u");
550 irtype = new_type_union(id);
552 irtype = new_type_struct(id);
555 compound->irtype_complete = false;
556 compound->irtype = irtype;
562 layout_union_type(type);
564 layout_struct_type(type);
567 compound->irtype_complete = true;
569 entity_t *entry = compound->members.entities;
570 for ( ; entry != NULL; entry = entry->base.next) {
571 if (entry->kind != ENTITY_COMPOUND_MEMBER)
574 symbol_t *symbol = entry->base.symbol;
575 type_t *entry_type = entry->declaration.type;
577 if (symbol == NULL) {
578 /* anonymous bitfield member, skip */
579 if (entry->compound_member.bitfield)
581 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
582 || entry_type->kind == TYPE_COMPOUND_UNION);
583 ident = id_unique("anon.%u");
585 ident = new_id_from_str(symbol->string);
588 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
590 ir_type *entry_irtype;
591 if (entry->compound_member.bitfield) {
592 entry_irtype = create_bitfield_type(entry);
594 entry_irtype = get_ir_type(entry_type);
596 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
598 set_entity_offset(entity, entry->compound_member.offset);
599 set_entity_offset_bits_remainder(entity,
600 entry->compound_member.bit_offset);
602 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
603 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
604 entry->compound_member.entity = entity;
607 set_type_alignment_bytes(irtype, compound->alignment);
608 set_type_size_bytes(irtype, compound->size);
609 set_type_state(irtype, layout_fixed);
614 static ir_tarval *fold_constant_to_tarval(expression_t const *);
616 static void determine_enum_values(enum_type_t *const type)
618 ir_mode *const mode = atomic_modes[type->base.akind];
619 ir_tarval *const one = get_mode_one(mode);
620 ir_tarval * tv_next = get_mode_null(mode);
622 enum_t *enume = type->enume;
623 entity_t *entry = enume->base.next;
624 for (; entry != NULL; entry = entry->base.next) {
625 if (entry->kind != ENTITY_ENUM_VALUE)
628 expression_t *const init = entry->enum_value.value;
630 tv_next = fold_constant_to_tarval(init);
632 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
633 entry->enum_value.tv = tv_next;
634 tv_next = tarval_add(tv_next, one);
638 static ir_type *create_enum_type(enum_type_t *const type)
640 return create_atomic_type(type->base.akind, (const type_t*) type);
643 static ir_type *get_ir_type_incomplete(type_t *type)
645 assert(type != NULL);
646 type = skip_typeref(type);
648 if (type->base.firm_type != NULL) {
649 return type->base.firm_type;
652 if (is_type_compound(type)) {
653 return create_compound_type(&type->compound, true);
655 return get_ir_type(type);
659 ir_type *get_ir_type(type_t *type)
661 assert(type != NULL);
663 type = skip_typeref(type);
665 if (type->base.firm_type != NULL) {
666 return type->base.firm_type;
669 ir_type *firm_type = NULL;
670 switch (type->kind) {
672 firm_type = create_atomic_type(type->atomic.akind, type);
675 firm_type = create_complex_type(&type->atomic);
678 firm_type = create_imaginary_type(&type->atomic);
681 firm_type = create_method_type(&type->function, false);
684 firm_type = create_pointer_type(&type->pointer);
687 firm_type = create_reference_type(&type->reference);
690 firm_type = create_array_type(&type->array);
692 case TYPE_COMPOUND_STRUCT:
693 case TYPE_COMPOUND_UNION:
694 firm_type = create_compound_type(&type->compound, false);
697 firm_type = create_enum_type(&type->enumt);
705 if (firm_type == NULL)
706 panic("unknown type found");
708 type->base.firm_type = firm_type;
712 static ir_mode *get_ir_mode_storage(type_t *type)
714 type = skip_typeref(type);
716 /* Firm doesn't report a mode for arrays and structs/unions. */
717 if (!is_type_scalar(type)) {
721 ir_type *const irtype = get_ir_type(type);
722 ir_mode *const mode = get_type_mode(irtype);
723 assert(mode != NULL);
728 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
729 * int that it returns bigger modes for floating point on some platforms
730 * (x87 internally does arithemtic with 80bits)
732 static ir_mode *get_ir_mode_arithmetic(type_t *type)
734 ir_mode *mode = get_ir_mode_storage(type);
735 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
736 return mode_float_arithmetic;
743 * Return a node representing the size of a type.
745 static ir_node *get_type_size_node(type_t *type)
748 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
749 type = skip_typeref(type);
751 if (is_type_array(type) && type->array.is_vla) {
752 ir_node *size_node = get_vla_size(&type->array);
753 ir_node *elem_size = get_type_size_node(type->array.element_type);
754 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
758 size = get_type_size(type);
759 return new_Const_long(mode, size);
762 /** Names of the runtime functions. */
763 static const struct {
764 int id; /**< the rts id */
765 int n_res; /**< number of return values */
766 const char *name; /**< the name of the rts function */
767 int n_params; /**< number of parameters */
768 unsigned flags; /**< language flags */
770 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
771 { rts_abort, 0, "abort", 0, _C89 },
772 { rts_alloca, 1, "alloca", 1, _ALL },
773 { rts_abs, 1, "abs", 1, _C89 },
774 { rts_labs, 1, "labs", 1, _C89 },
775 { rts_llabs, 1, "llabs", 1, _C99 },
776 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
778 { rts_fabs, 1, "fabs", 1, _C89 },
779 { rts_sqrt, 1, "sqrt", 1, _C89 },
780 { rts_cbrt, 1, "cbrt", 1, _C99 },
781 { rts_exp, 1, "exp", 1, _C89 },
782 { rts_exp2, 1, "exp2", 1, _C89 },
783 { rts_exp10, 1, "exp10", 1, _GNUC },
784 { rts_log, 1, "log", 1, _C89 },
785 { rts_log2, 1, "log2", 1, _C89 },
786 { rts_log10, 1, "log10", 1, _C89 },
787 { rts_pow, 1, "pow", 2, _C89 },
788 { rts_sin, 1, "sin", 1, _C89 },
789 { rts_cos, 1, "cos", 1, _C89 },
790 { rts_tan, 1, "tan", 1, _C89 },
791 { rts_asin, 1, "asin", 1, _C89 },
792 { rts_acos, 1, "acos", 1, _C89 },
793 { rts_atan, 1, "atan", 1, _C89 },
794 { rts_sinh, 1, "sinh", 1, _C89 },
795 { rts_cosh, 1, "cosh", 1, _C89 },
796 { rts_tanh, 1, "tanh", 1, _C89 },
798 { rts_fabsf, 1, "fabsf", 1, _C99 },
799 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
800 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
801 { rts_expf, 1, "expf", 1, _C99 },
802 { rts_exp2f, 1, "exp2f", 1, _C99 },
803 { rts_exp10f, 1, "exp10f", 1, _GNUC },
804 { rts_logf, 1, "logf", 1, _C99 },
805 { rts_log2f, 1, "log2f", 1, _C99 },
806 { rts_log10f, 1, "log10f", 1, _C99 },
807 { rts_powf, 1, "powf", 2, _C99 },
808 { rts_sinf, 1, "sinf", 1, _C99 },
809 { rts_cosf, 1, "cosf", 1, _C99 },
810 { rts_tanf, 1, "tanf", 1, _C99 },
811 { rts_asinf, 1, "asinf", 1, _C99 },
812 { rts_acosf, 1, "acosf", 1, _C99 },
813 { rts_atanf, 1, "atanf", 1, _C99 },
814 { rts_sinhf, 1, "sinhf", 1, _C99 },
815 { rts_coshf, 1, "coshf", 1, _C99 },
816 { rts_tanhf, 1, "tanhf", 1, _C99 },
818 { rts_fabsl, 1, "fabsl", 1, _C99 },
819 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
820 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
821 { rts_expl, 1, "expl", 1, _C99 },
822 { rts_exp2l, 1, "exp2l", 1, _C99 },
823 { rts_exp10l, 1, "exp10l", 1, _GNUC },
824 { rts_logl, 1, "logl", 1, _C99 },
825 { rts_log2l, 1, "log2l", 1, _C99 },
826 { rts_log10l, 1, "log10l", 1, _C99 },
827 { rts_powl, 1, "powl", 2, _C99 },
828 { rts_sinl, 1, "sinl", 1, _C99 },
829 { rts_cosl, 1, "cosl", 1, _C99 },
830 { rts_tanl, 1, "tanl", 1, _C99 },
831 { rts_asinl, 1, "asinl", 1, _C99 },
832 { rts_acosl, 1, "acosl", 1, _C99 },
833 { rts_atanl, 1, "atanl", 1, _C99 },
834 { rts_sinhl, 1, "sinhl", 1, _C99 },
835 { rts_coshl, 1, "coshl", 1, _C99 },
836 { rts_tanhl, 1, "tanhl", 1, _C99 },
838 { rts_strcmp, 1, "strcmp", 2, _C89 },
839 { rts_strncmp, 1, "strncmp", 3, _C89 },
840 { rts_strcpy, 1, "strcpy", 2, _C89 },
841 { rts_strlen, 1, "strlen", 1, _C89 },
842 { rts_memcpy, 1, "memcpy", 3, _C89 },
843 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
844 { rts_memmove, 1, "memmove", 3, _C89 },
845 { rts_memset, 1, "memset", 3, _C89 },
846 { rts_memcmp, 1, "memcmp", 3, _C89 },
849 static ident *rts_idents[lengthof(rts_data)];
851 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
853 void set_create_ld_ident(ident *(*func)(entity_t*))
855 create_ld_ident = func;
859 * Handle GNU attributes for entities
861 * @param ent the entity
862 * @param decl the routine declaration
864 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
866 assert(is_declaration(entity));
867 decl_modifiers_t modifiers = entity->declaration.modifiers;
869 if (is_method_entity(irentity)) {
870 if (modifiers & DM_PURE) {
871 set_entity_additional_properties(irentity, mtp_property_pure);
873 if (modifiers & DM_CONST) {
874 add_entity_additional_properties(irentity, mtp_property_const);
877 if (modifiers & DM_USED) {
878 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
880 if (modifiers & DM_WEAK) {
881 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
885 static bool is_main(entity_t *entity)
887 static symbol_t *sym_main = NULL;
888 if (sym_main == NULL) {
889 sym_main = symbol_table_insert("main");
892 if (entity->base.symbol != sym_main)
894 /* must be in outermost scope */
895 if (entity->base.parent_scope != ¤t_translation_unit->scope)
902 * Creates an entity representing a function.
904 * @param entity the function declaration/definition
905 * @param owner_type the owner type of this function, NULL
906 * for global functions
908 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
910 assert(entity->kind == ENTITY_FUNCTION);
911 if (entity->function.irentity != NULL)
912 return entity->function.irentity;
914 switch (entity->function.btk) {
917 case BUILTIN_LIBC_CHECK:
923 if (is_main(entity)) {
924 /* force main to C linkage */
925 type_t *type = entity->declaration.type;
926 assert(is_type_function(type));
927 if (type->function.linkage != LINKAGE_C) {
928 type_t *new_type = duplicate_type(type);
929 new_type->function.linkage = LINKAGE_C;
930 type = identify_new_type(new_type);
931 entity->declaration.type = type;
935 symbol_t *symbol = entity->base.symbol;
936 ident *id = new_id_from_str(symbol->string);
938 /* already an entity defined? */
939 ir_entity *irentity = entitymap_get(&entitymap, symbol);
940 bool const has_body = entity->function.statement != NULL;
941 if (irentity != NULL) {
942 if (get_entity_visibility(irentity) == ir_visibility_external
944 set_entity_visibility(irentity, ir_visibility_default);
949 ir_type *ir_type_method;
950 if (entity->function.need_closure)
951 ir_type_method = create_method_type(&entity->declaration.type->function, true);
953 ir_type_method = get_ir_type(entity->declaration.type);
955 bool nested_function = false;
956 if (owner_type == NULL)
957 owner_type = get_glob_type();
959 nested_function = true;
961 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
962 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
966 ld_id = id_unique("inner.%u");
968 ld_id = create_ld_ident(entity);
969 set_entity_ld_ident(irentity, ld_id);
971 handle_decl_modifiers(irentity, entity);
973 if (! nested_function) {
974 /* static inline => local
975 * extern inline => local
976 * inline without definition => local
977 * inline with definition => external_visible */
978 storage_class_tag_t const storage_class
979 = (storage_class_tag_t) entity->declaration.storage_class;
980 bool const is_inline = entity->function.is_inline;
982 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
983 set_entity_visibility(irentity, ir_visibility_default);
984 } else if (storage_class == STORAGE_CLASS_STATIC ||
985 (is_inline && has_body)) {
986 set_entity_visibility(irentity, ir_visibility_local);
987 } else if (has_body) {
988 set_entity_visibility(irentity, ir_visibility_default);
990 set_entity_visibility(irentity, ir_visibility_external);
993 /* nested functions are always local */
994 set_entity_visibility(irentity, ir_visibility_local);
997 /* We should check for file scope here, but as long as we compile C only
998 this is not needed. */
999 if (!freestanding && !has_body) {
1000 /* check for a known runtime function */
1001 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1002 if (id != rts_idents[i])
1005 function_type_t *function_type
1006 = &entity->declaration.type->function;
1007 /* rts_entities code can't handle a "wrong" number of parameters */
1008 if (function_type->unspecified_parameters)
1011 /* check number of parameters */
1012 int n_params = count_parameters(function_type);
1013 if (n_params != rts_data[i].n_params)
1016 type_t *return_type = skip_typeref(function_type->return_type);
1017 int n_res = is_type_void(return_type) ? 0 : 1;
1018 if (n_res != rts_data[i].n_res)
1021 /* ignore those rts functions not necessary needed for current mode */
1022 if ((c_mode & rts_data[i].flags) == 0)
1024 assert(rts_entities[rts_data[i].id] == NULL);
1025 rts_entities[rts_data[i].id] = irentity;
1029 entitymap_insert(&entitymap, symbol, irentity);
1032 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1033 entity->function.irentity = irentity;
1039 * Creates a SymConst for a given entity.
1041 * @param dbgi debug info
1042 * @param entity the entity
1044 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1046 assert(entity != NULL);
1047 union symconst_symbol sym;
1048 sym.entity_p = entity;
1049 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1052 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1054 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1057 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1060 if (is_Const(value)) {
1061 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1064 ir_node *cond = new_d_Cond(dbgi, value);
1065 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1066 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1067 ir_node *tblock = new_Block(1, &proj_true);
1068 ir_node *fblock = new_Block(1, &proj_false);
1069 set_cur_block(tblock);
1070 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1071 ir_node *tjump = new_Jmp();
1072 set_cur_block(fblock);
1073 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1074 ir_node *fjump = new_Jmp();
1076 ir_node *in[2] = { tjump, fjump };
1077 ir_node *mergeblock = new_Block(2, in);
1078 set_cur_block(mergeblock);
1079 ir_node *phi_in[2] = { const1, const0 };
1080 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1084 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1086 ir_mode *value_mode = get_irn_mode(value);
1088 if (value_mode == dest_mode)
1091 if (dest_mode == mode_b) {
1092 ir_node *zero = new_Const(get_mode_null(value_mode));
1093 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1095 } else if (value_mode == mode_b) {
1096 return create_conv_from_b(dbgi, value, dest_mode);
1099 return new_d_Conv(dbgi, value, dest_mode);
1103 * Creates a SymConst node representing a wide string literal.
1105 * @param literal the wide string literal
1107 static ir_node *wide_string_literal_to_firm(
1108 const string_literal_expression_t *literal)
1110 ir_type *const global_type = get_glob_type();
1111 ir_type *const elem_type = ir_type_wchar_t;
1112 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1113 ir_type *const type = new_type_array(1, elem_type);
1115 ident *const id = id_unique("str.%u");
1116 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1117 set_entity_ld_ident(entity, id);
1118 set_entity_visibility(entity, ir_visibility_private);
1119 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1121 ir_mode *const mode = get_type_mode(elem_type);
1122 const size_t slen = wstrlen(&literal->value);
1124 set_array_lower_bound_int(type, 0, 0);
1125 set_array_upper_bound_int(type, 0, slen);
1126 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1127 set_type_state(type, layout_fixed);
1129 ir_initializer_t *initializer = create_initializer_compound(slen);
1130 const char *p = literal->value.begin;
1131 for (size_t i = 0; i < slen; ++i) {
1132 assert(p < literal->value.begin + literal->value.size);
1133 utf32 v = read_utf8_char(&p);
1134 ir_tarval *tv = new_tarval_from_long(v, mode);
1135 ir_initializer_t *val = create_initializer_tarval(tv);
1136 set_initializer_compound_value(initializer, i, val);
1138 set_entity_initializer(entity, initializer);
1140 return create_symconst(dbgi, entity);
1144 * Creates a SymConst node representing a string constant.
1146 * @param src_pos the source position of the string constant
1147 * @param id_prefix a prefix for the name of the generated string constant
1148 * @param value the value of the string constant
1150 static ir_node *string_to_firm(const source_position_t *const src_pos,
1151 const char *const id_prefix,
1152 const string_t *const value)
1154 ir_type *const global_type = get_glob_type();
1155 dbg_info *const dbgi = get_dbg_info(src_pos);
1156 ir_type *const type = new_type_array(1, ir_type_const_char);
1158 ident *const id = id_unique(id_prefix);
1159 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1160 set_entity_ld_ident(entity, id);
1161 set_entity_visibility(entity, ir_visibility_private);
1162 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1164 ir_type *const elem_type = ir_type_const_char;
1165 ir_mode *const mode = get_type_mode(elem_type);
1167 const char* const string = value->begin;
1168 const size_t slen = value->size;
1170 set_array_lower_bound_int(type, 0, 0);
1171 set_array_upper_bound_int(type, 0, slen);
1172 set_type_size_bytes(type, slen);
1173 set_type_state(type, layout_fixed);
1175 ir_initializer_t *initializer = create_initializer_compound(slen);
1176 for (size_t i = 0; i < slen; ++i) {
1177 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1178 ir_initializer_t *val = create_initializer_tarval(tv);
1179 set_initializer_compound_value(initializer, i, val);
1181 set_entity_initializer(entity, initializer);
1183 return create_symconst(dbgi, entity);
1186 static bool try_create_integer(literal_expression_t *literal,
1187 type_t *type, unsigned char base)
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 *mode = atomic_modes[akind];
1196 ir_tarval *tv = new_integer_tarval_from_str(string, size, 1, base, 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)
1209 const string_t *suffix = &literal->suffix;
1211 if (suffix->size > 0) {
1212 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1213 if (*c == 'u' || *c == 'U') { ++us; }
1214 if (*c == 'l' || *c == 'L') { ++ls; }
1219 switch (literal->base.kind) {
1220 case EXPR_LITERAL_INTEGER_OCTAL: base = 8; break;
1221 case EXPR_LITERAL_INTEGER: base = 10; break;
1222 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1223 default: panic("invalid literal kind");
1226 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1228 /* now try if the constant is small enough for some types */
1229 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1231 if (us == 0 && try_create_integer(literal, type_int, base))
1233 if ((us == 1 || base != 10)
1234 && try_create_integer(literal, type_unsigned_int, base))
1238 if (us == 0 && try_create_integer(literal, type_long, base))
1240 if ((us == 1 || base != 10)
1241 && try_create_integer(literal, type_unsigned_long, base))
1244 /* last try? then we should not report tarval_bad */
1245 if (us != 1 && base == 10)
1246 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1247 if (us == 0 && try_create_integer(literal, type_long_long, base))
1251 assert(us == 1 || base != 10);
1252 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1253 bool res = try_create_integer(literal, type_unsigned_long_long, base);
1255 panic("internal error when parsing number literal");
1258 tarval_set_integer_overflow_mode(old_mode);
1261 void determine_literal_type(literal_expression_t *literal)
1263 switch (literal->base.kind) {
1264 case EXPR_LITERAL_INTEGER:
1265 case EXPR_LITERAL_INTEGER_OCTAL:
1266 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1267 create_integer_tarval(literal);
1275 * Creates a Const node representing a constant.
1277 static ir_node *literal_to_firm(const literal_expression_t *literal)
1279 type_t *type = skip_typeref(literal->base.type);
1280 ir_mode *mode = get_ir_mode_storage(type);
1281 const char *string = literal->value.begin;
1282 size_t size = literal->value.size;
1285 switch (literal->base.kind) {
1286 case EXPR_LITERAL_WIDE_CHARACTER: {
1287 utf32 v = read_utf8_char(&string);
1289 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1291 tv = new_tarval_from_str(buf, len, mode);
1295 case EXPR_LITERAL_CHARACTER: {
1298 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1299 if (size == 1 && char_is_signed) {
1300 v = (signed char)string[0];
1303 for (size_t i = 0; i < size; ++i) {
1304 v = (v << 8) | ((unsigned char)string[i]);
1308 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1310 tv = new_tarval_from_str(buf, len, mode);
1314 case EXPR_LITERAL_INTEGER:
1315 case EXPR_LITERAL_INTEGER_OCTAL:
1316 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1317 assert(literal->target_value != NULL);
1318 tv = literal->target_value;
1321 case EXPR_LITERAL_FLOATINGPOINT:
1322 tv = new_tarval_from_str(string, size, mode);
1325 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1326 char buffer[size + 2];
1327 memcpy(buffer, "0x", 2);
1328 memcpy(buffer+2, string, size);
1329 tv = new_tarval_from_str(buffer, size+2, mode);
1333 case EXPR_LITERAL_BOOLEAN:
1334 if (string[0] == 't') {
1335 tv = get_mode_one(mode);
1337 assert(string[0] == 'f');
1338 case EXPR_LITERAL_MS_NOOP:
1339 tv = get_mode_null(mode);
1344 panic("Invalid literal kind found");
1347 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1348 ir_node *res = new_d_Const(dbgi, tv);
1349 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1350 return create_conv(dbgi, res, mode_arith);
1354 * Allocate an area of size bytes aligned at alignment
1357 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1359 static unsigned area_cnt = 0;
1362 ir_type *tp = new_type_array(1, ir_type_char);
1363 set_array_bounds_int(tp, 0, 0, size);
1364 set_type_alignment_bytes(tp, alignment);
1366 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1367 ident *name = new_id_from_str(buf);
1368 ir_entity *area = new_entity(frame_type, name, tp);
1370 /* mark this entity as compiler generated */
1371 set_entity_compiler_generated(area, 1);
1376 * Return a node representing a trampoline region
1377 * for a given function entity.
1379 * @param dbgi debug info
1380 * @param entity the function entity
1382 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1384 ir_entity *region = NULL;
1387 if (current_trampolines != NULL) {
1388 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1389 if (current_trampolines[i].function == entity) {
1390 region = current_trampolines[i].region;
1395 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1397 ir_graph *irg = current_ir_graph;
1398 if (region == NULL) {
1399 /* create a new region */
1400 ir_type *frame_tp = get_irg_frame_type(irg);
1401 trampoline_region reg;
1402 reg.function = entity;
1404 reg.region = alloc_trampoline(frame_tp,
1405 be_params->trampoline_size,
1406 be_params->trampoline_align);
1407 ARR_APP1(trampoline_region, current_trampolines, reg);
1408 region = reg.region;
1410 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1415 * Creates a trampoline for a function represented by an entity.
1417 * @param dbgi debug info
1418 * @param mode the (reference) mode for the function address
1419 * @param entity the function entity
1421 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1424 assert(entity != NULL);
1426 in[0] = get_trampoline_region(dbgi, entity);
1427 in[1] = create_symconst(dbgi, entity);
1428 in[2] = get_irg_frame(current_ir_graph);
1430 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1431 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1432 return new_Proj(irn, mode, pn_Builtin_max+1);
1436 * Dereference an address.
1438 * @param dbgi debug info
1439 * @param type the type of the dereferenced result (the points_to type)
1440 * @param addr the address to dereference
1442 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1443 ir_node *const addr)
1445 type_t *skipped = skip_typeref(type);
1446 if (is_type_incomplete(skipped))
1449 ir_type *irtype = get_ir_type(skipped);
1450 if (is_compound_type(irtype)
1451 || is_Method_type(irtype)
1452 || is_Array_type(irtype)) {
1456 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1457 ? cons_volatile : cons_none;
1458 ir_mode *const mode = get_type_mode(irtype);
1459 ir_node *const memory = get_store();
1460 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1461 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1462 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1464 set_store(load_mem);
1466 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1467 return create_conv(dbgi, load_res, mode_arithmetic);
1471 * Creates a strict Conv (to the node's mode) if necessary.
1473 * @param dbgi debug info
1474 * @param node the node to strict conv
1476 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1478 ir_mode *mode = get_irn_mode(node);
1480 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1482 if (!mode_is_float(mode))
1485 /* check if there is already a Conv */
1486 if (is_Conv(node)) {
1487 /* convert it into a strict Conv */
1488 set_Conv_strict(node, 1);
1492 /* otherwise create a new one */
1493 return new_d_strictConv(dbgi, node, mode);
1497 * Returns the correct base address depending on whether it is a parameter or a
1498 * normal local variable.
1500 static ir_node *get_local_frame(ir_entity *const ent)
1502 ir_graph *const irg = current_ir_graph;
1503 const ir_type *const owner = get_entity_owner(ent);
1504 if (owner == current_outer_frame) {
1505 assert(current_static_link != NULL);
1506 return current_static_link;
1508 return get_irg_frame(irg);
1513 * Keep all memory edges of the given block.
1515 static void keep_all_memory(ir_node *block)
1517 ir_node *old = get_cur_block();
1519 set_cur_block(block);
1520 keep_alive(get_store());
1521 /* TODO: keep all memory edges from restricted pointers */
1525 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1527 entity_t *entity = ref->entity;
1528 if (entity->enum_value.tv == NULL) {
1529 type_t *type = skip_typeref(entity->enum_value.enum_type);
1530 assert(type->kind == TYPE_ENUM);
1531 determine_enum_values(&type->enumt);
1534 return new_Const(entity->enum_value.tv);
1537 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1539 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1540 entity_t *entity = ref->entity;
1541 assert(is_declaration(entity));
1542 type_t *type = skip_typeref(entity->declaration.type);
1544 /* make sure the type is constructed */
1545 (void) get_ir_type(type);
1547 if (entity->kind == ENTITY_FUNCTION
1548 && entity->function.btk != BUILTIN_NONE) {
1549 ir_entity *irentity = get_function_entity(entity, NULL);
1550 /* for gcc compatibility we have to produce (dummy) addresses for some
1551 * builtins which don't have entities */
1552 if (irentity == NULL) {
1553 source_position_t const *const pos = &ref->base.source_position;
1554 symbol_t const *const sym = ref->entity->base.symbol;
1555 warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1557 /* simply create a NULL pointer */
1558 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1559 ir_node *res = new_Const(get_mode_null(mode));
1565 switch ((declaration_kind_t) entity->declaration.kind) {
1566 case DECLARATION_KIND_UNKNOWN:
1569 case DECLARATION_KIND_LOCAL_VARIABLE: {
1570 ir_mode *const mode = get_ir_mode_storage(type);
1571 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1572 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1574 case DECLARATION_KIND_PARAMETER: {
1575 ir_mode *const mode = get_ir_mode_storage(type);
1576 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1577 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1579 case DECLARATION_KIND_FUNCTION: {
1580 return create_symconst(dbgi, entity->function.irentity);
1582 case DECLARATION_KIND_INNER_FUNCTION: {
1583 ir_mode *const mode = get_ir_mode_storage(type);
1584 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1585 /* inner function not using the closure */
1586 return create_symconst(dbgi, entity->function.irentity);
1588 /* need trampoline here */
1589 return create_trampoline(dbgi, mode, entity->function.irentity);
1592 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1593 const variable_t *variable = &entity->variable;
1594 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1595 return deref_address(dbgi, variable->base.type, addr);
1598 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1599 ir_entity *irentity = entity->variable.v.entity;
1600 ir_node *frame = get_local_frame(irentity);
1601 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1602 return deref_address(dbgi, entity->declaration.type, sel);
1604 case DECLARATION_KIND_PARAMETER_ENTITY: {
1605 ir_entity *irentity = entity->parameter.v.entity;
1606 ir_node *frame = get_local_frame(irentity);
1607 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1608 return deref_address(dbgi, entity->declaration.type, sel);
1611 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1612 return entity->variable.v.vla_base;
1614 case DECLARATION_KIND_COMPOUND_MEMBER:
1615 panic("not implemented reference type");
1618 panic("reference to declaration with unknown type found");
1621 static ir_node *reference_addr(const reference_expression_t *ref)
1623 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1624 entity_t *entity = ref->entity;
1625 assert(is_declaration(entity));
1627 switch((declaration_kind_t) entity->declaration.kind) {
1628 case DECLARATION_KIND_UNKNOWN:
1630 case DECLARATION_KIND_PARAMETER:
1631 case DECLARATION_KIND_LOCAL_VARIABLE:
1632 /* you can store to a local variable (so we don't panic but return NULL
1633 * as an indicator for no real address) */
1635 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1636 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1639 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1640 ir_entity *irentity = entity->variable.v.entity;
1641 ir_node *frame = get_local_frame(irentity);
1642 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1646 case DECLARATION_KIND_PARAMETER_ENTITY: {
1647 ir_entity *irentity = entity->parameter.v.entity;
1648 ir_node *frame = get_local_frame(irentity);
1649 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1654 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1655 return entity->variable.v.vla_base;
1657 case DECLARATION_KIND_FUNCTION: {
1658 return create_symconst(dbgi, entity->function.irentity);
1661 case DECLARATION_KIND_INNER_FUNCTION: {
1662 type_t *const type = skip_typeref(entity->declaration.type);
1663 ir_mode *const mode = get_ir_mode_storage(type);
1664 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1665 /* inner function not using the closure */
1666 return create_symconst(dbgi, entity->function.irentity);
1668 /* need trampoline here */
1669 return create_trampoline(dbgi, mode, entity->function.irentity);
1673 case DECLARATION_KIND_COMPOUND_MEMBER:
1674 panic("not implemented reference type");
1677 panic("reference to declaration with unknown type found");
1681 * Transform calls to builtin functions.
1683 static ir_node *process_builtin_call(const call_expression_t *call)
1685 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1687 assert(call->function->kind == EXPR_REFERENCE);
1688 reference_expression_t *builtin = &call->function->reference;
1690 type_t *expr_type = skip_typeref(builtin->base.type);
1691 assert(is_type_pointer(expr_type));
1693 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1695 switch (builtin->entity->function.btk) {
1698 case BUILTIN_ALLOCA: {
1699 expression_t *argument = call->arguments->expression;
1700 ir_node *size = expression_to_firm(argument);
1702 ir_node *store = get_store();
1703 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1705 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1707 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1712 type_t *type = function_type->function.return_type;
1713 ir_mode *mode = get_ir_mode_arithmetic(type);
1714 ir_tarval *tv = get_mode_infinite(mode);
1715 ir_node *res = new_d_Const(dbgi, tv);
1719 /* Ignore string for now... */
1720 assert(is_type_function(function_type));
1721 type_t *type = function_type->function.return_type;
1722 ir_mode *mode = get_ir_mode_arithmetic(type);
1723 ir_tarval *tv = get_mode_NAN(mode);
1724 ir_node *res = new_d_Const(dbgi, tv);
1727 case BUILTIN_EXPECT: {
1728 expression_t *argument = call->arguments->expression;
1729 return _expression_to_firm(argument);
1731 case BUILTIN_VA_END:
1732 /* evaluate the argument of va_end for its side effects */
1733 _expression_to_firm(call->arguments->expression);
1735 case BUILTIN_OBJECT_SIZE: {
1736 /* determine value of "type" */
1737 expression_t *type_expression = call->arguments->next->expression;
1738 long type_val = fold_constant_to_int(type_expression);
1739 type_t *type = function_type->function.return_type;
1740 ir_mode *mode = get_ir_mode_arithmetic(type);
1741 /* just produce a "I don't know" result */
1742 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1743 get_mode_minus_one(mode);
1745 return new_d_Const(dbgi, result);
1747 case BUILTIN_ROTL: {
1748 ir_node *val = expression_to_firm(call->arguments->expression);
1749 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1750 ir_mode *mode = get_irn_mode(val);
1751 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1752 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1754 case BUILTIN_ROTR: {
1755 ir_node *val = expression_to_firm(call->arguments->expression);
1756 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1757 ir_mode *mode = get_irn_mode(val);
1758 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1759 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1760 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1761 return new_d_Rotl(dbgi, val, sub, mode);
1766 case BUILTIN_LIBC_CHECK:
1767 panic("builtin did not produce an entity");
1769 panic("invalid builtin found");
1773 * Transform a call expression.
1774 * Handles some special cases, like alloca() calls, which must be resolved
1775 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1776 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1779 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1781 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1782 assert(currently_reachable());
1784 expression_t *function = call->function;
1785 ir_node *callee = NULL;
1786 bool firm_builtin = false;
1787 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1788 if (function->kind == EXPR_REFERENCE) {
1789 const reference_expression_t *ref = &function->reference;
1790 entity_t *entity = ref->entity;
1792 if (entity->kind == ENTITY_FUNCTION) {
1793 builtin_kind_t builtin = entity->function.btk;
1794 if (builtin == BUILTIN_FIRM) {
1795 firm_builtin = true;
1796 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1797 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1798 && builtin != BUILTIN_LIBC_CHECK) {
1799 return process_builtin_call(call);
1804 callee = expression_to_firm(function);
1806 type_t *type = skip_typeref(function->base.type);
1807 assert(is_type_pointer(type));
1808 pointer_type_t *pointer_type = &type->pointer;
1809 type_t *points_to = skip_typeref(pointer_type->points_to);
1810 assert(is_type_function(points_to));
1811 function_type_t *function_type = &points_to->function;
1813 int n_parameters = 0;
1814 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1815 ir_type *new_method_type = NULL;
1816 if (function_type->variadic || function_type->unspecified_parameters) {
1817 const call_argument_t *argument = call->arguments;
1818 for ( ; argument != NULL; argument = argument->next) {
1822 /* we need to construct a new method type matching the call
1824 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1825 int n_res = get_method_n_ress(ir_method_type);
1826 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1827 set_method_calling_convention(new_method_type,
1828 get_method_calling_convention(ir_method_type));
1829 set_method_additional_properties(new_method_type,
1830 get_method_additional_properties(ir_method_type));
1831 set_method_variadicity(new_method_type,
1832 get_method_variadicity(ir_method_type));
1834 for (int i = 0; i < n_res; ++i) {
1835 set_method_res_type(new_method_type, i,
1836 get_method_res_type(ir_method_type, i));
1838 argument = call->arguments;
1839 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1840 expression_t *expression = argument->expression;
1841 ir_type *irtype = get_ir_type(expression->base.type);
1842 set_method_param_type(new_method_type, i, irtype);
1844 ir_method_type = new_method_type;
1846 n_parameters = get_method_n_params(ir_method_type);
1849 ir_node *in[n_parameters];
1851 const call_argument_t *argument = call->arguments;
1852 for (int n = 0; n < n_parameters; ++n) {
1853 expression_t *expression = argument->expression;
1854 ir_node *arg_node = expression_to_firm(expression);
1856 type_t *arg_type = skip_typeref(expression->base.type);
1857 if (!is_type_compound(arg_type)) {
1858 ir_mode *const mode = get_ir_mode_storage(arg_type);
1859 arg_node = create_conv(dbgi, arg_node, mode);
1860 arg_node = do_strict_conv(dbgi, arg_node);
1865 argument = argument->next;
1869 if (function_type->modifiers & DM_CONST) {
1870 store = get_irg_no_mem(current_ir_graph);
1872 store = get_store();
1876 type_t *return_type = skip_typeref(function_type->return_type);
1877 ir_node *result = NULL;
1879 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1881 if (! (function_type->modifiers & DM_CONST)) {
1882 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1886 if (!is_type_void(return_type)) {
1887 assert(is_type_scalar(return_type));
1888 ir_mode *mode = get_ir_mode_storage(return_type);
1889 result = new_Proj(node, mode, pn_Builtin_max+1);
1890 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1891 result = create_conv(NULL, result, mode_arith);
1894 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1895 if (! (function_type->modifiers & DM_CONST)) {
1896 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1900 if (!is_type_void(return_type)) {
1901 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1902 ir_mode *const mode = get_ir_mode_storage(return_type);
1903 result = new_Proj(resproj, mode, 0);
1904 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1905 result = create_conv(NULL, result, mode_arith);
1909 if (function_type->modifiers & DM_NORETURN) {
1910 /* A dead end: Keep the Call and the Block. Also place all further
1911 * nodes into a new and unreachable block. */
1913 keep_alive(get_cur_block());
1914 ir_node *block = new_Block(0, NULL);
1915 set_cur_block(block);
1921 static ir_node *statement_to_firm(statement_t *statement);
1922 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1924 static ir_node *expression_to_addr(const expression_t *expression);
1925 static ir_node *create_condition_evaluation(const expression_t *expression,
1926 ir_node *true_block,
1927 ir_node *false_block);
1929 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1932 if (!is_type_compound(type)) {
1933 ir_mode *mode = get_ir_mode_storage(type);
1934 value = create_conv(dbgi, value, mode);
1935 value = do_strict_conv(dbgi, value);
1938 ir_node *memory = get_store();
1940 if (is_type_scalar(type)) {
1941 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1942 ? cons_volatile : cons_none;
1943 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1944 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1945 set_store(store_mem);
1947 ir_type *irtype = get_ir_type(type);
1948 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1949 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1950 set_store(copyb_mem);
1954 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1956 ir_tarval *all_one = get_mode_all_one(mode);
1957 int mode_size = get_mode_size_bits(mode);
1958 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1960 assert(offset >= 0);
1962 assert(offset + size <= mode_size);
1963 if (size == mode_size) {
1967 long shiftr = get_mode_size_bits(mode) - size;
1968 long shiftl = offset;
1969 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1970 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1971 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1972 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1977 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1978 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1981 ir_type *entity_type = get_entity_type(entity);
1982 ir_type *base_type = get_primitive_base_type(entity_type);
1983 ir_mode *mode = get_type_mode(base_type);
1984 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1986 value = create_conv(dbgi, value, mode);
1988 /* kill upper bits of value and shift to right position */
1989 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1990 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1991 unsigned base_bits = get_mode_size_bits(mode);
1992 unsigned shiftwidth = base_bits - bitsize;
1994 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1995 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1997 unsigned shrwidth = base_bits - bitsize - bitoffset;
1998 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1999 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
2001 /* load current value */
2002 ir_node *mem = get_store();
2003 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2004 set_volatile ? cons_volatile : cons_none);
2005 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2006 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2007 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2008 ir_tarval *inv_mask = tarval_not(shift_mask);
2009 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2010 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2012 /* construct new value and store */
2013 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2014 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2015 set_volatile ? cons_volatile : cons_none);
2016 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2017 set_store(store_mem);
2023 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2024 if (mode_is_signed(mode)) {
2025 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2027 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2032 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2035 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2036 entity_t *entity = expression->compound_entry;
2037 type_t *base_type = entity->declaration.type;
2038 ir_mode *mode = get_ir_mode_storage(base_type);
2039 ir_node *mem = get_store();
2040 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2041 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2042 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2043 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2045 ir_mode *amode = mode;
2046 /* optimisation, since shifting in modes < machine_size is usually
2048 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2051 unsigned amode_size = get_mode_size_bits(amode);
2052 load_res = create_conv(dbgi, load_res, amode);
2054 set_store(load_mem);
2056 /* kill upper bits */
2057 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2058 unsigned bitoffset = entity->compound_member.bit_offset;
2059 unsigned bitsize = entity->compound_member.bit_size;
2060 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
2061 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
2062 ir_node *countl = new_d_Const(dbgi, tvl);
2063 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
2065 unsigned shift_bitsr = bitoffset + shift_bitsl;
2066 assert(shift_bitsr <= amode_size);
2067 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
2068 ir_node *countr = new_d_Const(dbgi, tvr);
2070 if (mode_is_signed(mode)) {
2071 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2073 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2076 type_t *type = expression->base.type;
2077 ir_mode *resmode = get_ir_mode_arithmetic(type);
2078 return create_conv(dbgi, shiftr, resmode);
2081 /* make sure the selected compound type is constructed */
2082 static void construct_select_compound(const select_expression_t *expression)
2084 type_t *type = skip_typeref(expression->compound->base.type);
2085 if (is_type_pointer(type)) {
2086 type = type->pointer.points_to;
2088 (void) get_ir_type(type);
2091 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2092 ir_node *value, ir_node *addr)
2094 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2095 type_t *type = skip_typeref(expression->base.type);
2097 if (!is_type_compound(type)) {
2098 ir_mode *mode = get_ir_mode_storage(type);
2099 value = create_conv(dbgi, value, mode);
2100 value = do_strict_conv(dbgi, value);
2103 if (expression->kind == EXPR_REFERENCE) {
2104 const reference_expression_t *ref = &expression->reference;
2106 entity_t *entity = ref->entity;
2107 assert(is_declaration(entity));
2108 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2109 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2110 set_value(entity->variable.v.value_number, value);
2112 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2113 set_value(entity->parameter.v.value_number, value);
2119 addr = expression_to_addr(expression);
2120 assert(addr != NULL);
2122 if (expression->kind == EXPR_SELECT) {
2123 const select_expression_t *select = &expression->select;
2125 construct_select_compound(select);
2127 entity_t *entity = select->compound_entry;
2128 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2129 if (entity->compound_member.bitfield) {
2130 ir_entity *irentity = entity->compound_member.entity;
2132 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2133 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2134 set_volatile, true);
2139 assign_value(dbgi, addr, type, value);
2143 static void set_value_for_expression(const expression_t *expression,
2146 set_value_for_expression_addr(expression, value, NULL);
2149 static ir_node *get_value_from_lvalue(const expression_t *expression,
2152 if (expression->kind == EXPR_REFERENCE) {
2153 const reference_expression_t *ref = &expression->reference;
2155 entity_t *entity = ref->entity;
2156 assert(entity->kind == ENTITY_VARIABLE
2157 || entity->kind == ENTITY_PARAMETER);
2158 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2160 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2161 value_number = entity->variable.v.value_number;
2162 assert(addr == NULL);
2163 type_t *type = skip_typeref(expression->base.type);
2164 ir_mode *mode = get_ir_mode_storage(type);
2165 ir_node *res = get_value(value_number, mode);
2166 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2167 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2168 value_number = entity->parameter.v.value_number;
2169 assert(addr == NULL);
2170 type_t *type = skip_typeref(expression->base.type);
2171 ir_mode *mode = get_ir_mode_storage(type);
2172 ir_node *res = get_value(value_number, mode);
2173 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2177 assert(addr != NULL);
2178 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2181 if (expression->kind == EXPR_SELECT &&
2182 expression->select.compound_entry->compound_member.bitfield) {
2183 construct_select_compound(&expression->select);
2184 value = bitfield_extract_to_firm(&expression->select, addr);
2186 value = deref_address(dbgi, expression->base.type, addr);
2193 static ir_node *create_incdec(const unary_expression_t *expression)
2195 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2196 const expression_t *value_expr = expression->value;
2197 ir_node *addr = expression_to_addr(value_expr);
2198 ir_node *value = get_value_from_lvalue(value_expr, addr);
2200 type_t *type = skip_typeref(expression->base.type);
2201 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2204 if (is_type_pointer(type)) {
2205 pointer_type_t *pointer_type = &type->pointer;
2206 offset = get_type_size_node(pointer_type->points_to);
2208 assert(is_type_arithmetic(type));
2209 offset = new_Const(get_mode_one(mode));
2213 ir_node *store_value;
2214 switch(expression->base.kind) {
2215 case EXPR_UNARY_POSTFIX_INCREMENT:
2217 store_value = new_d_Add(dbgi, value, offset, mode);
2219 case EXPR_UNARY_POSTFIX_DECREMENT:
2221 store_value = new_d_Sub(dbgi, value, offset, mode);
2223 case EXPR_UNARY_PREFIX_INCREMENT:
2224 result = new_d_Add(dbgi, value, offset, mode);
2225 store_value = result;
2227 case EXPR_UNARY_PREFIX_DECREMENT:
2228 result = new_d_Sub(dbgi, value, offset, mode);
2229 store_value = result;
2232 panic("no incdec expr in create_incdec");
2235 set_value_for_expression_addr(value_expr, store_value, addr);
2240 static bool is_local_variable(expression_t *expression)
2242 if (expression->kind != EXPR_REFERENCE)
2244 reference_expression_t *ref_expr = &expression->reference;
2245 entity_t *entity = ref_expr->entity;
2246 if (entity->kind != ENTITY_VARIABLE)
2248 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2249 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2252 static ir_relation get_relation(const expression_kind_t kind)
2255 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2256 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2257 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2258 case EXPR_BINARY_ISLESS:
2259 case EXPR_BINARY_LESS: return ir_relation_less;
2260 case EXPR_BINARY_ISLESSEQUAL:
2261 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2262 case EXPR_BINARY_ISGREATER:
2263 case EXPR_BINARY_GREATER: return ir_relation_greater;
2264 case EXPR_BINARY_ISGREATEREQUAL:
2265 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2266 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2271 panic("trying to get pn_Cmp from non-comparison binexpr type");
2275 * Handle the assume optimizer hint: check if a Confirm
2276 * node can be created.
2278 * @param dbi debug info
2279 * @param expr the IL assume expression
2281 * we support here only some simple cases:
2286 static ir_node *handle_assume_compare(dbg_info *dbi,
2287 const binary_expression_t *expression)
2289 expression_t *op1 = expression->left;
2290 expression_t *op2 = expression->right;
2291 entity_t *var2, *var = NULL;
2292 ir_node *res = NULL;
2293 ir_relation relation = get_relation(expression->base.kind);
2295 if (is_local_variable(op1) && is_local_variable(op2)) {
2296 var = op1->reference.entity;
2297 var2 = op2->reference.entity;
2299 type_t *const type = skip_typeref(var->declaration.type);
2300 ir_mode *const mode = get_ir_mode_storage(type);
2302 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2303 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2305 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2306 set_value(var2->variable.v.value_number, res);
2308 res = new_d_Confirm(dbi, irn1, irn2, relation);
2309 set_value(var->variable.v.value_number, res);
2314 expression_t *con = NULL;
2315 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2316 var = op1->reference.entity;
2318 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2319 relation = get_inversed_relation(relation);
2320 var = op2->reference.entity;
2325 type_t *const type = skip_typeref(var->declaration.type);
2326 ir_mode *const mode = get_ir_mode_storage(type);
2328 res = get_value(var->variable.v.value_number, mode);
2329 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2330 set_value(var->variable.v.value_number, res);
2336 * Handle the assume optimizer hint.
2338 * @param dbi debug info
2339 * @param expr the IL assume expression
2341 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2343 switch(expression->kind) {
2344 case EXPR_BINARY_EQUAL:
2345 case EXPR_BINARY_NOTEQUAL:
2346 case EXPR_BINARY_LESS:
2347 case EXPR_BINARY_LESSEQUAL:
2348 case EXPR_BINARY_GREATER:
2349 case EXPR_BINARY_GREATEREQUAL:
2350 return handle_assume_compare(dbi, &expression->binary);
2356 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2357 type_t *from_type, type_t *type)
2359 type = skip_typeref(type);
2360 if (is_type_void(type)) {
2361 /* make sure firm type is constructed */
2362 (void) get_ir_type(type);
2365 if (!is_type_scalar(type)) {
2366 /* make sure firm type is constructed */
2367 (void) get_ir_type(type);
2371 from_type = skip_typeref(from_type);
2372 ir_mode *mode = get_ir_mode_storage(type);
2373 /* check for conversion from / to __based types */
2374 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2375 const variable_t *from_var = from_type->pointer.base_variable;
2376 const variable_t *to_var = type->pointer.base_variable;
2377 if (from_var != to_var) {
2378 if (from_var != NULL) {
2379 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2380 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2381 value_node = new_d_Add(dbgi, value_node, base, mode);
2383 if (to_var != NULL) {
2384 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2385 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2386 value_node = new_d_Sub(dbgi, value_node, base, mode);
2391 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2392 /* bool adjustments (we save a mode_Bu, but have to temporarily
2393 * convert to mode_b so we only get a 0/1 value */
2394 value_node = create_conv(dbgi, value_node, mode_b);
2397 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2398 ir_node *node = create_conv(dbgi, value_node, mode);
2399 node = do_strict_conv(dbgi, node);
2400 node = create_conv(dbgi, node, mode_arith);
2405 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2407 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2408 type_t *type = skip_typeref(expression->base.type);
2410 const expression_t *value = expression->value;
2412 switch(expression->base.kind) {
2413 case EXPR_UNARY_TAKE_ADDRESS:
2414 return expression_to_addr(value);
2416 case EXPR_UNARY_NEGATE: {
2417 ir_node *value_node = expression_to_firm(value);
2418 ir_mode *mode = get_ir_mode_arithmetic(type);
2419 return new_d_Minus(dbgi, value_node, mode);
2421 case EXPR_UNARY_PLUS:
2422 return expression_to_firm(value);
2423 case EXPR_UNARY_BITWISE_NEGATE: {
2424 ir_node *value_node = expression_to_firm(value);
2425 ir_mode *mode = get_ir_mode_arithmetic(type);
2426 return new_d_Not(dbgi, value_node, mode);
2428 case EXPR_UNARY_NOT: {
2429 ir_node *value_node = _expression_to_firm(value);
2430 value_node = create_conv(dbgi, value_node, mode_b);
2431 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2434 case EXPR_UNARY_DEREFERENCE: {
2435 ir_node *value_node = expression_to_firm(value);
2436 type_t *value_type = skip_typeref(value->base.type);
2437 assert(is_type_pointer(value_type));
2439 /* check for __based */
2440 const variable_t *const base_var = value_type->pointer.base_variable;
2441 if (base_var != NULL) {
2442 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2443 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2444 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2446 type_t *points_to = value_type->pointer.points_to;
2447 return deref_address(dbgi, points_to, value_node);
2449 case EXPR_UNARY_POSTFIX_INCREMENT:
2450 case EXPR_UNARY_POSTFIX_DECREMENT:
2451 case EXPR_UNARY_PREFIX_INCREMENT:
2452 case EXPR_UNARY_PREFIX_DECREMENT:
2453 return create_incdec(expression);
2454 case EXPR_UNARY_CAST: {
2455 ir_node *value_node = expression_to_firm(value);
2456 type_t *from_type = value->base.type;
2457 return create_cast(dbgi, value_node, from_type, type);
2459 case EXPR_UNARY_ASSUME:
2460 return handle_assume(dbgi, value);
2465 panic("invalid UNEXPR type found");
2469 * produces a 0/1 depending of the value of a mode_b node
2471 static ir_node *produce_condition_result(const expression_t *expression,
2472 ir_mode *mode, dbg_info *dbgi)
2474 ir_node *const one_block = new_immBlock();
2475 ir_node *const zero_block = new_immBlock();
2476 create_condition_evaluation(expression, one_block, zero_block);
2477 mature_immBlock(one_block);
2478 mature_immBlock(zero_block);
2480 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2481 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2482 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2483 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2484 set_cur_block(block);
2486 ir_node *const one = new_Const(get_mode_one(mode));
2487 ir_node *const zero = new_Const(get_mode_null(mode));
2488 ir_node *const in[2] = { one, zero };
2489 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2494 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2495 ir_node *value, type_t *type)
2497 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2498 assert(is_type_pointer(type));
2499 pointer_type_t *const pointer_type = &type->pointer;
2500 type_t *const points_to = skip_typeref(pointer_type->points_to);
2501 ir_node * elem_size = get_type_size_node(points_to);
2502 elem_size = create_conv(dbgi, elem_size, mode);
2503 value = create_conv(dbgi, value, mode);
2504 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2508 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2509 ir_node *left, ir_node *right)
2512 type_t *type_left = skip_typeref(expression->left->base.type);
2513 type_t *type_right = skip_typeref(expression->right->base.type);
2515 expression_kind_t kind = expression->base.kind;
2518 case EXPR_BINARY_SHIFTLEFT:
2519 case EXPR_BINARY_SHIFTRIGHT:
2520 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2521 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2522 mode = get_ir_mode_arithmetic(expression->base.type);
2523 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2526 case EXPR_BINARY_SUB:
2527 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2528 const pointer_type_t *const ptr_type = &type_left->pointer;
2530 mode = get_ir_mode_arithmetic(expression->base.type);
2531 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2532 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2533 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2534 ir_node *const no_mem = new_NoMem();
2535 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2536 mode, op_pin_state_floats);
2537 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2540 case EXPR_BINARY_SUB_ASSIGN:
2541 if (is_type_pointer(type_left)) {
2542 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2543 mode = get_ir_mode_arithmetic(type_left);
2548 case EXPR_BINARY_ADD:
2549 case EXPR_BINARY_ADD_ASSIGN:
2550 if (is_type_pointer(type_left)) {
2551 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2552 mode = get_ir_mode_arithmetic(type_left);
2554 } else if (is_type_pointer(type_right)) {
2555 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2556 mode = get_ir_mode_arithmetic(type_right);
2563 mode = get_ir_mode_arithmetic(type_right);
2564 left = create_conv(dbgi, left, mode);
2569 case EXPR_BINARY_ADD_ASSIGN:
2570 case EXPR_BINARY_ADD:
2571 return new_d_Add(dbgi, left, right, mode);
2572 case EXPR_BINARY_SUB_ASSIGN:
2573 case EXPR_BINARY_SUB:
2574 return new_d_Sub(dbgi, left, right, mode);
2575 case EXPR_BINARY_MUL_ASSIGN:
2576 case EXPR_BINARY_MUL:
2577 return new_d_Mul(dbgi, left, right, mode);
2578 case EXPR_BINARY_BITWISE_AND:
2579 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2580 return new_d_And(dbgi, left, right, mode);
2581 case EXPR_BINARY_BITWISE_OR:
2582 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2583 return new_d_Or(dbgi, left, right, mode);
2584 case EXPR_BINARY_BITWISE_XOR:
2585 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2586 return new_d_Eor(dbgi, left, right, mode);
2587 case EXPR_BINARY_SHIFTLEFT:
2588 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2589 return new_d_Shl(dbgi, left, right, mode);
2590 case EXPR_BINARY_SHIFTRIGHT:
2591 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2592 if (mode_is_signed(mode)) {
2593 return new_d_Shrs(dbgi, left, right, mode);
2595 return new_d_Shr(dbgi, left, right, mode);
2597 case EXPR_BINARY_DIV:
2598 case EXPR_BINARY_DIV_ASSIGN: {
2599 ir_node *pin = new_Pin(new_NoMem());
2600 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2601 op_pin_state_floats);
2602 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2605 case EXPR_BINARY_MOD:
2606 case EXPR_BINARY_MOD_ASSIGN: {
2607 ir_node *pin = new_Pin(new_NoMem());
2608 assert(!mode_is_float(mode));
2609 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2610 op_pin_state_floats);
2611 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2615 panic("unexpected expression kind");
2619 static ir_node *create_lazy_op(const binary_expression_t *expression)
2621 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2622 type_t *type = skip_typeref(expression->base.type);
2623 ir_mode *mode = get_ir_mode_arithmetic(type);
2625 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2626 bool val = fold_constant_to_bool(expression->left);
2627 expression_kind_t ekind = expression->base.kind;
2628 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2629 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2631 return new_Const(get_mode_null(mode));
2635 return new_Const(get_mode_one(mode));
2639 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2640 bool valr = fold_constant_to_bool(expression->right);
2641 return create_Const_from_bool(mode, valr);
2644 return produce_condition_result(expression->right, mode, dbgi);
2647 return produce_condition_result((const expression_t*) expression, mode,
2651 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2652 ir_node *right, ir_mode *mode);
2654 static ir_node *create_assign_binop(const binary_expression_t *expression)
2656 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2657 const expression_t *left_expr = expression->left;
2658 type_t *type = skip_typeref(left_expr->base.type);
2659 ir_node *right = expression_to_firm(expression->right);
2660 ir_node *left_addr = expression_to_addr(left_expr);
2661 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2662 ir_node *result = create_op(dbgi, expression, left, right);
2664 result = create_cast(dbgi, result, expression->right->base.type, type);
2665 result = do_strict_conv(dbgi, result);
2667 result = set_value_for_expression_addr(left_expr, result, left_addr);
2669 if (!is_type_compound(type)) {
2670 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2671 result = create_conv(dbgi, result, mode_arithmetic);
2676 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2678 expression_kind_t kind = expression->base.kind;
2681 case EXPR_BINARY_EQUAL:
2682 case EXPR_BINARY_NOTEQUAL:
2683 case EXPR_BINARY_LESS:
2684 case EXPR_BINARY_LESSEQUAL:
2685 case EXPR_BINARY_GREATER:
2686 case EXPR_BINARY_GREATEREQUAL:
2687 case EXPR_BINARY_ISGREATER:
2688 case EXPR_BINARY_ISGREATEREQUAL:
2689 case EXPR_BINARY_ISLESS:
2690 case EXPR_BINARY_ISLESSEQUAL:
2691 case EXPR_BINARY_ISLESSGREATER:
2692 case EXPR_BINARY_ISUNORDERED: {
2693 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2694 ir_node *left = expression_to_firm(expression->left);
2695 ir_node *right = expression_to_firm(expression->right);
2696 ir_relation relation = get_relation(kind);
2697 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2700 case EXPR_BINARY_ASSIGN: {
2701 ir_node *addr = expression_to_addr(expression->left);
2702 ir_node *right = expression_to_firm(expression->right);
2704 = set_value_for_expression_addr(expression->left, right, addr);
2706 type_t *type = skip_typeref(expression->base.type);
2707 if (!is_type_compound(type)) {
2708 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2709 res = create_conv(NULL, res, mode_arithmetic);
2713 case EXPR_BINARY_ADD:
2714 case EXPR_BINARY_SUB:
2715 case EXPR_BINARY_MUL:
2716 case EXPR_BINARY_DIV:
2717 case EXPR_BINARY_MOD:
2718 case EXPR_BINARY_BITWISE_AND:
2719 case EXPR_BINARY_BITWISE_OR:
2720 case EXPR_BINARY_BITWISE_XOR:
2721 case EXPR_BINARY_SHIFTLEFT:
2722 case EXPR_BINARY_SHIFTRIGHT:
2724 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2725 ir_node *left = expression_to_firm(expression->left);
2726 ir_node *right = expression_to_firm(expression->right);
2727 return create_op(dbgi, expression, left, right);
2729 case EXPR_BINARY_LOGICAL_AND:
2730 case EXPR_BINARY_LOGICAL_OR:
2731 return create_lazy_op(expression);
2732 case EXPR_BINARY_COMMA:
2733 /* create side effects of left side */
2734 (void) expression_to_firm(expression->left);
2735 return _expression_to_firm(expression->right);
2737 case EXPR_BINARY_ADD_ASSIGN:
2738 case EXPR_BINARY_SUB_ASSIGN:
2739 case EXPR_BINARY_MUL_ASSIGN:
2740 case EXPR_BINARY_MOD_ASSIGN:
2741 case EXPR_BINARY_DIV_ASSIGN:
2742 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2743 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2744 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2745 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2746 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2747 return create_assign_binop(expression);
2749 panic("TODO binexpr type");
2753 static ir_node *array_access_addr(const array_access_expression_t *expression)
2755 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2756 ir_node *base_addr = expression_to_firm(expression->array_ref);
2757 ir_node *offset = expression_to_firm(expression->index);
2758 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2759 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2760 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2765 static ir_node *array_access_to_firm(
2766 const array_access_expression_t *expression)
2768 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2769 ir_node *addr = array_access_addr(expression);
2770 type_t *type = revert_automatic_type_conversion(
2771 (const expression_t*) expression);
2772 type = skip_typeref(type);
2774 return deref_address(dbgi, type, addr);
2777 static long get_offsetof_offset(const offsetof_expression_t *expression)
2779 type_t *orig_type = expression->type;
2782 designator_t *designator = expression->designator;
2783 for ( ; designator != NULL; designator = designator->next) {
2784 type_t *type = skip_typeref(orig_type);
2785 /* be sure the type is constructed */
2786 (void) get_ir_type(type);
2788 if (designator->symbol != NULL) {
2789 assert(is_type_compound(type));
2790 symbol_t *symbol = designator->symbol;
2792 compound_t *compound = type->compound.compound;
2793 entity_t *iter = compound->members.entities;
2794 for ( ; iter != NULL; iter = iter->base.next) {
2795 if (iter->base.symbol == symbol) {
2799 assert(iter != NULL);
2801 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2802 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2803 offset += get_entity_offset(iter->compound_member.entity);
2805 orig_type = iter->declaration.type;
2807 expression_t *array_index = designator->array_index;
2808 assert(designator->array_index != NULL);
2809 assert(is_type_array(type));
2811 long index = fold_constant_to_int(array_index);
2812 ir_type *arr_type = get_ir_type(type);
2813 ir_type *elem_type = get_array_element_type(arr_type);
2814 long elem_size = get_type_size_bytes(elem_type);
2816 offset += index * elem_size;
2818 orig_type = type->array.element_type;
2825 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2827 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2828 long offset = get_offsetof_offset(expression);
2829 ir_tarval *tv = new_tarval_from_long(offset, mode);
2830 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2832 return new_d_Const(dbgi, tv);
2835 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2836 ir_entity *entity, type_t *type);
2837 static ir_initializer_t *create_ir_initializer(
2838 const initializer_t *initializer, type_t *type);
2840 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2841 initializer_t *initializer,
2844 /* create the ir_initializer */
2845 ir_graph *const old_current_ir_graph = current_ir_graph;
2846 current_ir_graph = get_const_code_irg();
2848 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2850 assert(current_ir_graph == get_const_code_irg());
2851 current_ir_graph = old_current_ir_graph;
2853 ident *const id = id_unique("initializer.%u");
2854 ir_type *const irtype = get_ir_type(type);
2855 ir_type *const global_type = get_glob_type();
2856 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2857 set_entity_ld_ident(entity, id);
2858 set_entity_visibility(entity, ir_visibility_private);
2859 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2860 set_entity_initializer(entity, irinitializer);
2864 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2866 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2867 type_t *type = expression->type;
2868 initializer_t *initializer = expression->initializer;
2870 if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2871 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2872 return create_symconst(dbgi, entity);
2874 /* create an entity on the stack */
2875 ident *const id = id_unique("CompLit.%u");
2876 ir_type *const irtype = get_ir_type(type);
2877 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2879 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2880 set_entity_ld_ident(entity, id);
2882 /* create initialisation code */
2883 create_local_initializer(initializer, dbgi, entity, type);
2885 /* create a sel for the compound literal address */
2886 ir_node *frame = get_irg_frame(current_ir_graph);
2887 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2892 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2894 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2895 type_t *const type = expr->type;
2896 ir_node *const addr = compound_literal_addr(expr);
2897 return deref_address(dbgi, type, addr);
2901 * Transform a sizeof expression into Firm code.
2903 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2905 type_t *const type = skip_typeref(expression->type);
2906 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2907 if (is_type_array(type) && type->array.is_vla
2908 && expression->tp_expression != NULL) {
2909 expression_to_firm(expression->tp_expression);
2912 return get_type_size_node(type);
2915 static entity_t *get_expression_entity(const expression_t *expression)
2917 if (expression->kind != EXPR_REFERENCE)
2920 return expression->reference.entity;
2923 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2925 switch(entity->kind) {
2926 case DECLARATION_KIND_CASES:
2927 return entity->declaration.alignment;
2930 return entity->compound.alignment;
2931 case ENTITY_TYPEDEF:
2932 return entity->typedefe.alignment;
2940 * Transform an alignof expression into Firm code.
2942 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2944 unsigned alignment = 0;
2946 const expression_t *tp_expression = expression->tp_expression;
2947 if (tp_expression != NULL) {
2948 entity_t *entity = get_expression_entity(tp_expression);
2949 if (entity != NULL) {
2950 if (entity->kind == ENTITY_FUNCTION) {
2951 /* a gnu-extension */
2954 alignment = get_cparser_entity_alignment(entity);
2959 if (alignment == 0) {
2960 type_t *type = expression->type;
2961 alignment = get_type_alignment(type);
2964 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2965 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2966 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2967 return new_d_Const(dbgi, tv);
2970 static void init_ir_types(void);
2972 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2974 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2976 bool constant_folding_old = constant_folding;
2977 constant_folding = true;
2978 int old_optimize = get_optimize();
2979 int old_constant_folding = get_opt_constant_folding();
2981 set_opt_constant_folding(1);
2985 ir_graph *old_current_ir_graph = current_ir_graph;
2986 current_ir_graph = get_const_code_irg();
2988 ir_node *cnst = expression_to_firm(expression);
2989 current_ir_graph = old_current_ir_graph;
2990 set_optimize(old_optimize);
2991 set_opt_constant_folding(old_constant_folding);
2993 if (!is_Const(cnst)) {
2994 panic("couldn't fold constant");
2997 constant_folding = constant_folding_old;
2999 return get_Const_tarval(cnst);
3002 /* this function is only used in parser.c, but it relies on libfirm functionality */
3003 bool constant_is_negative(const expression_t *expression)
3005 ir_tarval *tv = fold_constant_to_tarval(expression);
3006 return tarval_is_negative(tv);
3009 long fold_constant_to_int(const expression_t *expression)
3011 ir_tarval *tv = fold_constant_to_tarval(expression);
3012 if (!tarval_is_long(tv)) {
3013 panic("result of constant folding is not integer");
3016 return get_tarval_long(tv);
3019 bool fold_constant_to_bool(const expression_t *expression)
3021 ir_tarval *tv = fold_constant_to_tarval(expression);
3022 return !tarval_is_null(tv);
3025 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3027 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3029 /* first try to fold a constant condition */
3030 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3031 bool val = fold_constant_to_bool(expression->condition);
3033 expression_t *true_expression = expression->true_expression;
3034 if (true_expression == NULL)
3035 true_expression = expression->condition;
3036 return expression_to_firm(true_expression);
3038 return expression_to_firm(expression->false_expression);
3042 ir_node *const true_block = new_immBlock();
3043 ir_node *const false_block = new_immBlock();
3044 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3045 mature_immBlock(true_block);
3046 mature_immBlock(false_block);
3048 set_cur_block(true_block);
3050 if (expression->true_expression != NULL) {
3051 true_val = expression_to_firm(expression->true_expression);
3052 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3053 true_val = cond_expr;
3055 /* Condition ended with a short circuit (&&, ||, !) operation or a
3056 * comparison. Generate a "1" as value for the true branch. */
3057 true_val = new_Const(get_mode_one(mode_Is));
3059 ir_node *const true_jmp = new_d_Jmp(dbgi);
3061 set_cur_block(false_block);
3062 ir_node *const false_val = expression_to_firm(expression->false_expression);
3063 ir_node *const false_jmp = new_d_Jmp(dbgi);
3065 /* create the common block */
3066 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3067 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3068 set_cur_block(block);
3070 /* TODO improve static semantics, so either both or no values are NULL */
3071 if (true_val == NULL || false_val == NULL)
3074 ir_node *const in[2] = { true_val, false_val };
3075 type_t *const type = skip_typeref(expression->base.type);
3076 ir_mode *const mode = get_ir_mode_arithmetic(type);
3077 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3083 * Returns an IR-node representing the address of a field.
3085 static ir_node *select_addr(const select_expression_t *expression)
3087 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3089 construct_select_compound(expression);
3091 ir_node *compound_addr = expression_to_firm(expression->compound);
3093 entity_t *entry = expression->compound_entry;
3094 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3095 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3097 if (constant_folding) {
3098 ir_mode *mode = get_irn_mode(compound_addr);
3099 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3100 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3101 return new_d_Add(dbgi, compound_addr, ofs, mode);
3103 ir_entity *irentity = entry->compound_member.entity;
3104 assert(irentity != NULL);
3105 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3109 static ir_node *select_to_firm(const select_expression_t *expression)
3111 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3112 ir_node *addr = select_addr(expression);
3113 type_t *type = revert_automatic_type_conversion(
3114 (const expression_t*) expression);
3115 type = skip_typeref(type);
3117 entity_t *entry = expression->compound_entry;
3118 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3120 if (entry->compound_member.bitfield) {
3121 return bitfield_extract_to_firm(expression, addr);
3124 return deref_address(dbgi, type, addr);
3127 /* Values returned by __builtin_classify_type. */
3128 typedef enum gcc_type_class
3134 enumeral_type_class,
3137 reference_type_class,
3141 function_type_class,
3152 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3154 type_t *type = expr->type_expression->base.type;
3156 /* FIXME gcc returns different values depending on whether compiling C or C++
3157 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3160 type = skip_typeref(type);
3161 switch (type->kind) {
3163 const atomic_type_t *const atomic_type = &type->atomic;
3164 switch (atomic_type->akind) {
3165 /* should not be reached */
3166 case ATOMIC_TYPE_INVALID:
3170 /* gcc cannot do that */
3171 case ATOMIC_TYPE_VOID:
3172 tc = void_type_class;
3175 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3176 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3177 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3178 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3179 case ATOMIC_TYPE_SHORT:
3180 case ATOMIC_TYPE_USHORT:
3181 case ATOMIC_TYPE_INT:
3182 case ATOMIC_TYPE_UINT:
3183 case ATOMIC_TYPE_LONG:
3184 case ATOMIC_TYPE_ULONG:
3185 case ATOMIC_TYPE_LONGLONG:
3186 case ATOMIC_TYPE_ULONGLONG:
3187 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3188 tc = integer_type_class;
3191 case ATOMIC_TYPE_FLOAT:
3192 case ATOMIC_TYPE_DOUBLE:
3193 case ATOMIC_TYPE_LONG_DOUBLE:
3194 tc = real_type_class;
3197 panic("Unexpected atomic type in classify_type_to_firm().");
3200 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3201 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3202 case TYPE_ARRAY: /* gcc handles this as pointer */
3203 case TYPE_FUNCTION: /* gcc handles this as pointer */
3204 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3205 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3206 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3208 /* gcc handles this as integer */
3209 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3211 /* gcc classifies the referenced type */
3212 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3214 /* typedef/typeof should be skipped already */
3220 panic("unexpected TYPE classify_type_to_firm().");
3224 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3225 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3226 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3227 return new_d_Const(dbgi, tv);
3230 static ir_node *function_name_to_firm(
3231 const funcname_expression_t *const expr)
3233 switch(expr->kind) {
3234 case FUNCNAME_FUNCTION:
3235 case FUNCNAME_PRETTY_FUNCTION:
3236 case FUNCNAME_FUNCDNAME:
3237 if (current_function_name == NULL) {
3238 const source_position_t *const src_pos = &expr->base.source_position;
3239 const char *name = current_function_entity->base.symbol->string;
3240 const string_t string = { name, strlen(name) + 1 };
3241 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3243 return current_function_name;
3244 case FUNCNAME_FUNCSIG:
3245 if (current_funcsig == NULL) {
3246 const source_position_t *const src_pos = &expr->base.source_position;
3247 ir_entity *ent = get_irg_entity(current_ir_graph);
3248 const char *const name = get_entity_ld_name(ent);
3249 const string_t string = { name, strlen(name) + 1 };
3250 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3252 return current_funcsig;
3254 panic("Unsupported function name");
3257 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3259 statement_t *statement = expr->statement;
3261 assert(statement->kind == STATEMENT_COMPOUND);
3262 return compound_statement_to_firm(&statement->compound);
3265 static ir_node *va_start_expression_to_firm(
3266 const va_start_expression_t *const expr)
3268 ir_entity *param_ent = current_vararg_entity;
3269 if (param_ent == NULL) {
3270 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3271 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3272 ir_type *const param_type = get_unknown_type();
3273 param_ent = new_parameter_entity(frame_type, n, param_type);
3274 current_vararg_entity = param_ent;
3277 ir_node *const frame = get_irg_frame(current_ir_graph);
3278 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3279 ir_node *const no_mem = new_NoMem();
3280 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3282 set_value_for_expression(expr->ap, arg_sel);
3287 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3289 type_t *const type = expr->base.type;
3290 expression_t *const ap_expr = expr->ap;
3291 ir_node *const ap_addr = expression_to_addr(ap_expr);
3292 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3293 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3294 ir_node *const res = deref_address(dbgi, type, ap);
3296 ir_node *const cnst = get_type_size_node(expr->base.type);
3297 ir_mode *const mode = get_irn_mode(cnst);
3298 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3299 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3300 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3301 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3302 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3304 set_value_for_expression_addr(ap_expr, add, ap_addr);
3310 * Generate Firm for a va_copy expression.
3312 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3314 ir_node *const src = expression_to_firm(expr->src);
3315 set_value_for_expression(expr->dst, src);
3319 static ir_node *dereference_addr(const unary_expression_t *const expression)
3321 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3322 return expression_to_firm(expression->value);
3326 * Returns a IR-node representing an lvalue of the given expression.
3328 static ir_node *expression_to_addr(const expression_t *expression)
3330 switch(expression->kind) {
3331 case EXPR_ARRAY_ACCESS:
3332 return array_access_addr(&expression->array_access);
3334 return call_expression_to_firm(&expression->call);
3335 case EXPR_COMPOUND_LITERAL:
3336 return compound_literal_addr(&expression->compound_literal);
3337 case EXPR_REFERENCE:
3338 return reference_addr(&expression->reference);
3340 return select_addr(&expression->select);
3341 case EXPR_UNARY_DEREFERENCE:
3342 return dereference_addr(&expression->unary);
3346 panic("trying to get address of non-lvalue");
3349 static ir_node *builtin_constant_to_firm(
3350 const builtin_constant_expression_t *expression)
3352 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3353 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3354 return create_Const_from_bool(mode, v);
3357 static ir_node *builtin_types_compatible_to_firm(
3358 const builtin_types_compatible_expression_t *expression)
3360 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3361 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3362 bool const value = types_compatible(left, right);
3363 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3364 return create_Const_from_bool(mode, value);
3367 static ir_node *get_label_block(label_t *label)
3369 if (label->block != NULL)
3370 return label->block;
3372 /* beware: might be called from create initializer with current_ir_graph
3373 * set to const_code_irg. */
3374 ir_graph *rem = current_ir_graph;
3375 current_ir_graph = current_function;
3377 ir_node *block = new_immBlock();
3379 label->block = block;
3381 ARR_APP1(label_t *, all_labels, label);
3383 current_ir_graph = rem;
3388 * Pointer to a label. This is used for the
3389 * GNU address-of-label extension.
3391 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3393 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3394 ir_node *block = get_label_block(label->label);
3395 ir_entity *entity = create_Block_entity(block);
3397 symconst_symbol value;
3398 value.entity_p = entity;
3399 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3403 * creates firm nodes for an expression. The difference between this function
3404 * and expression_to_firm is, that this version might produce mode_b nodes
3405 * instead of mode_Is.
3407 static ir_node *_expression_to_firm(expression_t const *const expr)
3410 if (!constant_folding) {
3411 assert(!expr->base.transformed);
3412 ((expression_t*)expr)->base.transformed = true;
3416 switch (expr->kind) {
3417 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3418 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3419 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3420 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3421 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3422 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3423 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3424 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3425 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3426 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3427 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3428 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3429 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3430 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3431 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3432 case EXPR_SELECT: return select_to_firm( &expr->select);
3433 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3434 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3435 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3436 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3437 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3438 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3439 case EXPR_WIDE_STRING_LITERAL: return wide_string_literal_to_firm( &expr->string_literal);
3441 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3443 case EXPR_ERROR: break;
3445 panic("invalid expression found");
3449 * Check if a given expression is a GNU __builtin_expect() call.
3451 static bool is_builtin_expect(const expression_t *expression)
3453 if (expression->kind != EXPR_CALL)
3456 expression_t *function = expression->call.function;
3457 if (function->kind != EXPR_REFERENCE)
3459 reference_expression_t *ref = &function->reference;
3460 if (ref->entity->kind != ENTITY_FUNCTION ||
3461 ref->entity->function.btk != BUILTIN_EXPECT)
3467 static bool produces_mode_b(const expression_t *expression)
3469 switch (expression->kind) {
3470 case EXPR_BINARY_EQUAL:
3471 case EXPR_BINARY_NOTEQUAL:
3472 case EXPR_BINARY_LESS:
3473 case EXPR_BINARY_LESSEQUAL:
3474 case EXPR_BINARY_GREATER:
3475 case EXPR_BINARY_GREATEREQUAL:
3476 case EXPR_BINARY_ISGREATER:
3477 case EXPR_BINARY_ISGREATEREQUAL:
3478 case EXPR_BINARY_ISLESS:
3479 case EXPR_BINARY_ISLESSEQUAL:
3480 case EXPR_BINARY_ISLESSGREATER:
3481 case EXPR_BINARY_ISUNORDERED:
3482 case EXPR_UNARY_NOT:
3486 if (is_builtin_expect(expression)) {
3487 expression_t *argument = expression->call.arguments->expression;
3488 return produces_mode_b(argument);
3491 case EXPR_BINARY_COMMA:
3492 return produces_mode_b(expression->binary.right);
3499 static ir_node *expression_to_firm(const expression_t *expression)
3501 if (!produces_mode_b(expression)) {
3502 ir_node *res = _expression_to_firm(expression);
3503 assert(res == NULL || get_irn_mode(res) != mode_b);
3507 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3508 bool const constant_folding_old = constant_folding;
3509 constant_folding = true;
3510 ir_node *res = _expression_to_firm(expression);
3511 constant_folding = constant_folding_old;
3512 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3513 assert(is_Const(res));
3514 return create_Const_from_bool(mode, !is_Const_null(res));
3517 /* we have to produce a 0/1 from the mode_b expression */
3518 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3519 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3520 return produce_condition_result(expression, mode, dbgi);
3524 * create a short-circuit expression evaluation that tries to construct
3525 * efficient control flow structures for &&, || and ! expressions
3527 static ir_node *create_condition_evaluation(const expression_t *expression,
3528 ir_node *true_block,
3529 ir_node *false_block)
3531 switch(expression->kind) {
3532 case EXPR_UNARY_NOT: {
3533 const unary_expression_t *unary_expression = &expression->unary;
3534 create_condition_evaluation(unary_expression->value, false_block,
3538 case EXPR_BINARY_LOGICAL_AND: {
3539 const binary_expression_t *binary_expression = &expression->binary;
3541 ir_node *extra_block = new_immBlock();
3542 create_condition_evaluation(binary_expression->left, extra_block,
3544 mature_immBlock(extra_block);
3545 set_cur_block(extra_block);
3546 create_condition_evaluation(binary_expression->right, true_block,
3550 case EXPR_BINARY_LOGICAL_OR: {
3551 const binary_expression_t *binary_expression = &expression->binary;
3553 ir_node *extra_block = new_immBlock();
3554 create_condition_evaluation(binary_expression->left, true_block,
3556 mature_immBlock(extra_block);
3557 set_cur_block(extra_block);
3558 create_condition_evaluation(binary_expression->right, true_block,
3566 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3567 ir_node *cond_expr = _expression_to_firm(expression);
3568 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3569 ir_node *cond = new_d_Cond(dbgi, condition);
3570 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3571 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3573 /* set branch prediction info based on __builtin_expect */
3574 if (is_builtin_expect(expression) && is_Cond(cond)) {
3575 call_argument_t *argument = expression->call.arguments->next;
3576 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3577 bool const cnst = fold_constant_to_bool(argument->expression);
3578 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3579 set_Cond_jmp_pred(cond, pred);
3583 add_immBlock_pred(true_block, true_proj);
3584 add_immBlock_pred(false_block, false_proj);
3586 set_unreachable_now();
3590 static void create_variable_entity(entity_t *variable,
3591 declaration_kind_t declaration_kind,
3592 ir_type *parent_type)
3594 assert(variable->kind == ENTITY_VARIABLE);
3595 type_t *type = skip_typeref(variable->declaration.type);
3597 ident *const id = new_id_from_str(variable->base.symbol->string);
3598 ir_type *const irtype = get_ir_type(type);
3599 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3600 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3601 unsigned alignment = variable->declaration.alignment;
3603 set_entity_alignment(irentity, alignment);
3605 handle_decl_modifiers(irentity, variable);
3607 variable->declaration.kind = (unsigned char) declaration_kind;
3608 variable->variable.v.entity = irentity;
3609 set_entity_ld_ident(irentity, create_ld_ident(variable));
3611 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3612 set_entity_volatility(irentity, volatility_is_volatile);
3617 typedef struct type_path_entry_t type_path_entry_t;
3618 struct type_path_entry_t {
3620 ir_initializer_t *initializer;
3622 entity_t *compound_entry;
3625 typedef struct type_path_t type_path_t;
3626 struct type_path_t {
3627 type_path_entry_t *path;
3632 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3634 size_t len = ARR_LEN(path->path);
3636 for (size_t i = 0; i < len; ++i) {
3637 const type_path_entry_t *entry = & path->path[i];
3639 type_t *type = skip_typeref(entry->type);
3640 if (is_type_compound(type)) {
3641 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3642 } else if (is_type_array(type)) {
3643 fprintf(stderr, "[%u]", (unsigned) entry->index);
3645 fprintf(stderr, "-INVALID-");
3648 fprintf(stderr, " (");
3649 print_type(path->top_type);
3650 fprintf(stderr, ")");
3653 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3655 size_t len = ARR_LEN(path->path);
3657 return & path->path[len-1];
3660 static type_path_entry_t *append_to_type_path(type_path_t *path)
3662 size_t len = ARR_LEN(path->path);
3663 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3665 type_path_entry_t *result = & path->path[len];
3666 memset(result, 0, sizeof(result[0]));
3670 static size_t get_compound_member_count(const compound_type_t *type)
3672 compound_t *compound = type->compound;
3673 size_t n_members = 0;
3674 entity_t *member = compound->members.entities;
3675 for ( ; member != NULL; member = member->base.next) {
3682 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3684 type_t *orig_top_type = path->top_type;
3685 type_t *top_type = skip_typeref(orig_top_type);
3687 assert(is_type_compound(top_type) || is_type_array(top_type));
3689 if (ARR_LEN(path->path) == 0) {
3692 type_path_entry_t *top = get_type_path_top(path);
3693 ir_initializer_t *initializer = top->initializer;
3694 return get_initializer_compound_value(initializer, top->index);
3698 static void descend_into_subtype(type_path_t *path)
3700 type_t *orig_top_type = path->top_type;
3701 type_t *top_type = skip_typeref(orig_top_type);
3703 assert(is_type_compound(top_type) || is_type_array(top_type));
3705 ir_initializer_t *initializer = get_initializer_entry(path);
3707 type_path_entry_t *top = append_to_type_path(path);
3708 top->type = top_type;
3712 if (is_type_compound(top_type)) {
3713 compound_t *const compound = top_type->compound.compound;
3714 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3716 top->compound_entry = entry;
3718 len = get_compound_member_count(&top_type->compound);
3719 if (entry != NULL) {
3720 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3721 path->top_type = entry->declaration.type;
3724 assert(is_type_array(top_type));
3725 assert(top_type->array.size > 0);
3728 path->top_type = top_type->array.element_type;
3729 len = top_type->array.size;
3731 if (initializer == NULL
3732 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3733 initializer = create_initializer_compound(len);
3734 /* we have to set the entry at the 2nd latest path entry... */
3735 size_t path_len = ARR_LEN(path->path);
3736 assert(path_len >= 1);
3738 type_path_entry_t *entry = & path->path[path_len-2];
3739 ir_initializer_t *tinitializer = entry->initializer;
3740 set_initializer_compound_value(tinitializer, entry->index,
3744 top->initializer = initializer;
3747 static void ascend_from_subtype(type_path_t *path)
3749 type_path_entry_t *top = get_type_path_top(path);
3751 path->top_type = top->type;
3753 size_t len = ARR_LEN(path->path);
3754 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3757 static void walk_designator(type_path_t *path, const designator_t *designator)
3759 /* designators start at current object type */
3760 ARR_RESIZE(type_path_entry_t, path->path, 1);
3762 for ( ; designator != NULL; designator = designator->next) {
3763 type_path_entry_t *top = get_type_path_top(path);
3764 type_t *orig_type = top->type;
3765 type_t *type = skip_typeref(orig_type);
3767 if (designator->symbol != NULL) {
3768 assert(is_type_compound(type));
3770 symbol_t *symbol = designator->symbol;
3772 compound_t *compound = type->compound.compound;
3773 entity_t *iter = compound->members.entities;
3774 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3775 if (iter->base.symbol == symbol) {
3776 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3780 assert(iter != NULL);
3782 /* revert previous initialisations of other union elements */
3783 if (type->kind == TYPE_COMPOUND_UNION) {
3784 ir_initializer_t *initializer = top->initializer;
3785 if (initializer != NULL
3786 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3787 /* are we writing to a new element? */
3788 ir_initializer_t *oldi
3789 = get_initializer_compound_value(initializer, index);
3790 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3791 /* clear initializer */
3793 = get_initializer_compound_n_entries(initializer);
3794 ir_initializer_t *nulli = get_initializer_null();
3795 for (size_t i = 0; i < len; ++i) {
3796 set_initializer_compound_value(initializer, i,
3803 top->type = orig_type;
3804 top->compound_entry = iter;
3806 orig_type = iter->declaration.type;
3808 expression_t *array_index = designator->array_index;
3809 assert(designator->array_index != NULL);
3810 assert(is_type_array(type));
3812 long index = fold_constant_to_int(array_index);
3815 if (type->array.size_constant) {
3816 long array_size = type->array.size;
3817 assert(index < array_size);
3821 top->type = orig_type;
3822 top->index = (size_t) index;
3823 orig_type = type->array.element_type;
3825 path->top_type = orig_type;
3827 if (designator->next != NULL) {
3828 descend_into_subtype(path);
3832 path->invalid = false;
3835 static void advance_current_object(type_path_t *path)
3837 if (path->invalid) {
3838 /* TODO: handle this... */
3839 panic("invalid initializer in ast2firm (excessive elements)");
3842 type_path_entry_t *top = get_type_path_top(path);
3844 type_t *type = skip_typeref(top->type);
3845 if (is_type_union(type)) {
3846 /* only the first element is initialized in unions */
3847 top->compound_entry = NULL;
3848 } else if (is_type_struct(type)) {
3849 entity_t *entry = top->compound_entry;
3852 entry = skip_unnamed_bitfields(entry->base.next);
3853 top->compound_entry = entry;
3854 if (entry != NULL) {
3855 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3856 path->top_type = entry->declaration.type;
3860 assert(is_type_array(type));
3863 if (!type->array.size_constant || top->index < type->array.size) {
3868 /* we're past the last member of the current sub-aggregate, try if we
3869 * can ascend in the type hierarchy and continue with another subobject */
3870 size_t len = ARR_LEN(path->path);
3873 ascend_from_subtype(path);
3874 advance_current_object(path);
3876 path->invalid = true;
3881 static ir_initializer_t *create_ir_initializer_value(
3882 const initializer_value_t *initializer)
3884 if (is_type_compound(initializer->value->base.type)) {
3885 panic("initializer creation for compounds not implemented yet");
3887 type_t *type = initializer->value->base.type;
3888 expression_t *expr = initializer->value;
3889 ir_node *value = expression_to_firm(expr);
3890 ir_mode *mode = get_ir_mode_storage(type);
3891 value = create_conv(NULL, value, mode);
3892 return create_initializer_const(value);
3895 /** test wether type can be initialized by a string constant */
3896 static bool is_string_type(type_t *type)
3899 if (is_type_pointer(type)) {
3900 inner = skip_typeref(type->pointer.points_to);
3901 } else if(is_type_array(type)) {
3902 inner = skip_typeref(type->array.element_type);
3907 return is_type_integer(inner);
3910 static ir_initializer_t *create_ir_initializer_list(
3911 const initializer_list_t *initializer, type_t *type)
3914 memset(&path, 0, sizeof(path));
3915 path.top_type = type;
3916 path.path = NEW_ARR_F(type_path_entry_t, 0);
3918 descend_into_subtype(&path);
3920 for (size_t i = 0; i < initializer->len; ++i) {
3921 const initializer_t *sub_initializer = initializer->initializers[i];
3923 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3924 walk_designator(&path, sub_initializer->designator.designator);
3928 if (sub_initializer->kind == INITIALIZER_VALUE) {
3929 /* we might have to descend into types until we're at a scalar
3932 type_t *orig_top_type = path.top_type;
3933 type_t *top_type = skip_typeref(orig_top_type);
3935 if (is_type_scalar(top_type))
3937 descend_into_subtype(&path);
3939 } else if (sub_initializer->kind == INITIALIZER_STRING
3940 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3941 /* we might have to descend into types until we're at a scalar
3944 type_t *orig_top_type = path.top_type;
3945 type_t *top_type = skip_typeref(orig_top_type);
3947 if (is_string_type(top_type))
3949 descend_into_subtype(&path);
3953 ir_initializer_t *sub_irinitializer
3954 = create_ir_initializer(sub_initializer, path.top_type);
3956 size_t path_len = ARR_LEN(path.path);
3957 assert(path_len >= 1);
3958 type_path_entry_t *entry = & path.path[path_len-1];
3959 ir_initializer_t *tinitializer = entry->initializer;
3960 set_initializer_compound_value(tinitializer, entry->index,
3963 advance_current_object(&path);
3966 assert(ARR_LEN(path.path) >= 1);
3967 ir_initializer_t *result = path.path[0].initializer;
3968 DEL_ARR_F(path.path);
3973 static ir_initializer_t *create_ir_initializer_string(
3974 const initializer_string_t *initializer, type_t *type)
3976 type = skip_typeref(type);
3978 size_t string_len = initializer->string.size;
3979 assert(type->kind == TYPE_ARRAY);
3980 assert(type->array.size_constant);
3981 size_t len = type->array.size;
3982 ir_initializer_t *irinitializer = create_initializer_compound(len);
3984 const char *string = initializer->string.begin;
3985 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3987 for (size_t i = 0; i < len; ++i) {
3992 ir_tarval *tv = new_tarval_from_long(c, mode);
3993 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3995 set_initializer_compound_value(irinitializer, i, char_initializer);
3998 return irinitializer;
4001 static ir_initializer_t *create_ir_initializer_wide_string(
4002 const initializer_wide_string_t *initializer, type_t *type)
4004 assert(type->kind == TYPE_ARRAY);
4005 assert(type->array.size_constant);
4006 size_t len = type->array.size;
4007 size_t string_len = wstrlen(&initializer->string);
4008 ir_initializer_t *irinitializer = create_initializer_compound(len);
4010 const char *p = initializer->string.begin;
4011 ir_mode *mode = get_type_mode(ir_type_wchar_t);
4013 for (size_t i = 0; i < len; ++i) {
4015 if (i < string_len) {
4016 c = read_utf8_char(&p);
4018 ir_tarval *tv = new_tarval_from_long(c, mode);
4019 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4021 set_initializer_compound_value(irinitializer, i, char_initializer);
4024 return irinitializer;
4027 static ir_initializer_t *create_ir_initializer(
4028 const initializer_t *initializer, type_t *type)
4030 switch(initializer->kind) {
4031 case INITIALIZER_STRING:
4032 return create_ir_initializer_string(&initializer->string, type);
4034 case INITIALIZER_WIDE_STRING:
4035 return create_ir_initializer_wide_string(&initializer->wide_string,
4038 case INITIALIZER_LIST:
4039 return create_ir_initializer_list(&initializer->list, type);
4041 case INITIALIZER_VALUE:
4042 return create_ir_initializer_value(&initializer->value);
4044 case INITIALIZER_DESIGNATOR:
4045 panic("unexpected designator initializer found");
4047 panic("unknown initializer");
4050 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4051 * are elements [...] the remainder of the aggregate shall be initialized
4052 * implicitly the same as objects that have static storage duration. */
4053 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4056 /* for unions we must NOT do anything for null initializers */
4057 ir_type *owner = get_entity_owner(entity);
4058 if (is_Union_type(owner)) {
4062 ir_type *ent_type = get_entity_type(entity);
4063 /* create sub-initializers for a compound type */
4064 if (is_compound_type(ent_type)) {
4065 unsigned n_members = get_compound_n_members(ent_type);
4066 for (unsigned n = 0; n < n_members; ++n) {
4067 ir_entity *member = get_compound_member(ent_type, n);
4068 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4070 create_dynamic_null_initializer(member, dbgi, addr);
4074 if (is_Array_type(ent_type)) {
4075 assert(has_array_upper_bound(ent_type, 0));
4076 long n = get_array_upper_bound_int(ent_type, 0);
4077 for (long i = 0; i < n; ++i) {
4078 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4079 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4080 ir_node *cnst = new_d_Const(dbgi, index_tv);
4081 ir_node *in[1] = { cnst };
4082 ir_entity *arrent = get_array_element_entity(ent_type);
4083 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4085 create_dynamic_null_initializer(arrent, dbgi, addr);
4090 ir_mode *value_mode = get_type_mode(ent_type);
4091 ir_node *node = new_Const(get_mode_null(value_mode));
4093 /* is it a bitfield type? */
4094 if (is_Primitive_type(ent_type) &&
4095 get_primitive_base_type(ent_type) != NULL) {
4096 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4100 ir_node *mem = get_store();
4101 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4102 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4106 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4107 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4109 switch(get_initializer_kind(initializer)) {
4110 case IR_INITIALIZER_NULL:
4111 create_dynamic_null_initializer(entity, dbgi, base_addr);
4113 case IR_INITIALIZER_CONST: {
4114 ir_node *node = get_initializer_const_value(initializer);
4115 ir_type *ent_type = get_entity_type(entity);
4117 /* is it a bitfield type? */
4118 if (is_Primitive_type(ent_type) &&
4119 get_primitive_base_type(ent_type) != NULL) {
4120 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4124 assert(get_type_mode(type) == get_irn_mode(node));
4125 ir_node *mem = get_store();
4126 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4127 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4131 case IR_INITIALIZER_TARVAL: {
4132 ir_tarval *tv = get_initializer_tarval_value(initializer);
4133 ir_node *cnst = new_d_Const(dbgi, tv);
4134 ir_type *ent_type = get_entity_type(entity);
4136 /* is it a bitfield type? */
4137 if (is_Primitive_type(ent_type) &&
4138 get_primitive_base_type(ent_type) != NULL) {
4139 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4143 assert(get_type_mode(type) == get_tarval_mode(tv));
4144 ir_node *mem = get_store();
4145 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4146 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4150 case IR_INITIALIZER_COMPOUND: {
4151 assert(is_compound_type(type) || is_Array_type(type));
4153 if (is_Array_type(type)) {
4154 assert(has_array_upper_bound(type, 0));
4155 n_members = get_array_upper_bound_int(type, 0);
4157 n_members = get_compound_n_members(type);
4160 if (get_initializer_compound_n_entries(initializer)
4161 != (unsigned) n_members)
4162 panic("initializer doesn't match compound type");
4164 for (int i = 0; i < n_members; ++i) {
4167 ir_entity *sub_entity;
4168 if (is_Array_type(type)) {
4169 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4170 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4171 ir_node *cnst = new_d_Const(dbgi, index_tv);
4172 ir_node *in[1] = { cnst };
4173 irtype = get_array_element_type(type);
4174 sub_entity = get_array_element_entity(type);
4175 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4178 sub_entity = get_compound_member(type, i);
4179 irtype = get_entity_type(sub_entity);
4180 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4184 ir_initializer_t *sub_init
4185 = get_initializer_compound_value(initializer, i);
4187 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4194 panic("invalid IR_INITIALIZER found");
4197 static void create_dynamic_initializer(ir_initializer_t *initializer,
4198 dbg_info *dbgi, ir_entity *entity)
4200 ir_node *frame = get_irg_frame(current_ir_graph);
4201 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4202 ir_type *type = get_entity_type(entity);
4204 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4207 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4208 ir_entity *entity, type_t *type)
4210 ir_node *memory = get_store();
4211 ir_node *nomem = new_NoMem();
4212 ir_node *frame = get_irg_frame(current_ir_graph);
4213 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4215 if (initializer->kind == INITIALIZER_VALUE) {
4216 initializer_value_t *initializer_value = &initializer->value;
4218 ir_node *value = expression_to_firm(initializer_value->value);
4219 type = skip_typeref(type);
4220 assign_value(dbgi, addr, type, value);
4224 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4225 ir_initializer_t *irinitializer
4226 = create_ir_initializer(initializer, type);
4228 create_dynamic_initializer(irinitializer, dbgi, entity);
4232 /* create a "template" entity which is copied to the entity on the stack */
4233 ir_entity *const init_entity
4234 = create_initializer_entity(dbgi, initializer, type);
4235 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4236 ir_type *const irtype = get_ir_type(type);
4237 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4239 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4240 set_store(copyb_mem);
4243 static void create_initializer_local_variable_entity(entity_t *entity)
4245 assert(entity->kind == ENTITY_VARIABLE);
4246 initializer_t *initializer = entity->variable.initializer;
4247 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4248 ir_entity *irentity = entity->variable.v.entity;
4249 type_t *type = entity->declaration.type;
4251 create_local_initializer(initializer, dbgi, irentity, type);
4254 static void create_variable_initializer(entity_t *entity)
4256 assert(entity->kind == ENTITY_VARIABLE);
4257 initializer_t *initializer = entity->variable.initializer;
4258 if (initializer == NULL)
4261 declaration_kind_t declaration_kind
4262 = (declaration_kind_t) entity->declaration.kind;
4263 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4264 create_initializer_local_variable_entity(entity);
4268 type_t *type = entity->declaration.type;
4269 type_qualifiers_t tq = get_type_qualifier(type, true);
4271 if (initializer->kind == INITIALIZER_VALUE) {
4272 expression_t * value = initializer->value.value;
4273 type_t *const init_type = skip_typeref(value->base.type);
4275 if (!is_type_scalar(init_type)) {
4277 while (value->kind == EXPR_UNARY_CAST)
4278 value = value->unary.value;
4280 if (value->kind != EXPR_COMPOUND_LITERAL)
4281 panic("expected non-scalar initializer to be a compound literal");
4282 initializer = value->compound_literal.initializer;
4283 goto have_initializer;
4286 ir_node * node = expression_to_firm(value);
4287 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4288 ir_mode *const mode = get_ir_mode_storage(init_type);
4289 node = create_conv(dbgi, node, mode);
4290 node = do_strict_conv(dbgi, node);
4292 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4293 set_value(entity->variable.v.value_number, node);
4295 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4297 ir_entity *irentity = entity->variable.v.entity;
4299 if (tq & TYPE_QUALIFIER_CONST
4300 && get_entity_owner(irentity) != get_tls_type()) {
4301 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4303 set_atomic_ent_value(irentity, node);
4307 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4308 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4310 ir_entity *irentity = entity->variable.v.entity;
4311 ir_initializer_t *irinitializer
4312 = create_ir_initializer(initializer, type);
4314 if (tq & TYPE_QUALIFIER_CONST) {
4315 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4317 set_entity_initializer(irentity, irinitializer);
4321 static void create_variable_length_array(entity_t *entity)
4323 assert(entity->kind == ENTITY_VARIABLE);
4324 assert(entity->variable.initializer == NULL);
4326 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4327 entity->variable.v.vla_base = NULL;
4329 /* TODO: record VLA somewhere so we create the free node when we leave
4333 static void allocate_variable_length_array(entity_t *entity)
4335 assert(entity->kind == ENTITY_VARIABLE);
4336 assert(entity->variable.initializer == NULL);
4337 assert(currently_reachable());
4339 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4340 type_t *type = entity->declaration.type;
4341 ir_type *el_type = get_ir_type(type->array.element_type);
4343 /* make sure size_node is calculated */
4344 get_type_size_node(type);
4345 ir_node *elems = type->array.size_node;
4346 ir_node *mem = get_store();
4347 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4349 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4350 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4353 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4354 entity->variable.v.vla_base = addr;
4358 * Creates a Firm local variable from a declaration.
4360 static void create_local_variable(entity_t *entity)
4362 assert(entity->kind == ENTITY_VARIABLE);
4363 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4365 bool needs_entity = entity->variable.address_taken;
4366 type_t *type = skip_typeref(entity->declaration.type);
4368 /* is it a variable length array? */
4369 if (is_type_array(type) && !type->array.size_constant) {
4370 create_variable_length_array(entity);
4372 } else if (is_type_array(type) || is_type_compound(type)) {
4373 needs_entity = true;
4374 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4375 needs_entity = true;
4379 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4380 create_variable_entity(entity,
4381 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4384 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4385 entity->variable.v.value_number = next_value_number_function;
4386 set_irg_loc_description(current_ir_graph, next_value_number_function,
4388 ++next_value_number_function;
4392 static void create_local_static_variable(entity_t *entity)
4394 assert(entity->kind == ENTITY_VARIABLE);
4395 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4397 type_t *type = skip_typeref(entity->declaration.type);
4398 ir_type *const var_type = entity->variable.thread_local ?
4399 get_tls_type() : get_glob_type();
4400 ir_type *const irtype = get_ir_type(type);
4401 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4403 size_t l = strlen(entity->base.symbol->string);
4404 char buf[l + sizeof(".%u")];
4405 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4406 ident *const id = id_unique(buf);
4407 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4409 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4410 set_entity_volatility(irentity, volatility_is_volatile);
4413 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4414 entity->variable.v.entity = irentity;
4416 set_entity_ld_ident(irentity, id);
4417 set_entity_visibility(irentity, ir_visibility_local);
4419 ir_graph *const old_current_ir_graph = current_ir_graph;
4420 current_ir_graph = get_const_code_irg();
4422 create_variable_initializer(entity);
4424 assert(current_ir_graph == get_const_code_irg());
4425 current_ir_graph = old_current_ir_graph;
4430 static ir_node *return_statement_to_firm(return_statement_t *statement)
4432 if (!currently_reachable())
4435 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4436 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4437 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4440 if (!is_type_void(type)) {
4441 ir_mode *const mode = get_ir_mode_storage(type);
4443 res = create_conv(dbgi, res, mode);
4444 res = do_strict_conv(dbgi, res);
4446 res = new_Unknown(mode);
4453 ir_node *const in[1] = { res };
4454 ir_node *const store = get_store();
4455 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4457 ir_node *end_block = get_irg_end_block(current_ir_graph);
4458 add_immBlock_pred(end_block, ret);
4460 set_unreachable_now();
4464 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4466 if (!currently_reachable())
4469 return expression_to_firm(statement->expression);
4472 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4474 entity_t *entity = compound->scope.entities;
4475 for ( ; entity != NULL; entity = entity->base.next) {
4476 if (!is_declaration(entity))
4479 create_local_declaration(entity);
4482 ir_node *result = NULL;
4483 statement_t *statement = compound->statements;
4484 for ( ; statement != NULL; statement = statement->base.next) {
4485 result = statement_to_firm(statement);
4491 static void create_global_variable(entity_t *entity)
4493 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4494 ir_visibility visibility = ir_visibility_default;
4495 ir_entity *irentity;
4496 assert(entity->kind == ENTITY_VARIABLE);
4498 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4499 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4500 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4501 case STORAGE_CLASS_NONE:
4502 visibility = ir_visibility_default;
4503 /* uninitialized globals get merged in C */
4504 if (entity->variable.initializer == NULL)
4505 linkage |= IR_LINKAGE_MERGE;
4507 case STORAGE_CLASS_TYPEDEF:
4508 case STORAGE_CLASS_AUTO:
4509 case STORAGE_CLASS_REGISTER:
4510 panic("invalid storage class for global var");
4513 ir_type *var_type = get_glob_type();
4514 if (entity->variable.thread_local) {
4515 var_type = get_tls_type();
4516 /* LINKAGE_MERGE not supported by current linkers */
4517 linkage &= ~IR_LINKAGE_MERGE;
4519 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4520 irentity = entity->variable.v.entity;
4521 add_entity_linkage(irentity, linkage);
4522 set_entity_visibility(irentity, visibility);
4525 static void create_local_declaration(entity_t *entity)
4527 assert(is_declaration(entity));
4529 /* construct type */
4530 (void) get_ir_type(entity->declaration.type);
4531 if (entity->base.symbol == NULL) {
4535 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4536 case STORAGE_CLASS_STATIC:
4537 if (entity->kind == ENTITY_FUNCTION) {
4538 (void)get_function_entity(entity, NULL);
4540 create_local_static_variable(entity);
4543 case STORAGE_CLASS_EXTERN:
4544 if (entity->kind == ENTITY_FUNCTION) {
4545 assert(entity->function.statement == NULL);
4546 (void)get_function_entity(entity, NULL);
4548 create_global_variable(entity);
4549 create_variable_initializer(entity);
4552 case STORAGE_CLASS_NONE:
4553 case STORAGE_CLASS_AUTO:
4554 case STORAGE_CLASS_REGISTER:
4555 if (entity->kind == ENTITY_FUNCTION) {
4556 if (entity->function.statement != NULL) {
4557 ir_type *owner = get_irg_frame_type(current_ir_graph);
4558 (void)get_function_entity(entity, owner);
4559 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4560 enqueue_inner_function(entity);
4562 (void)get_function_entity(entity, NULL);
4565 create_local_variable(entity);
4568 case STORAGE_CLASS_TYPEDEF:
4571 panic("invalid storage class found");
4574 static void initialize_local_declaration(entity_t *entity)
4576 if (entity->base.symbol == NULL)
4579 // no need to emit code in dead blocks
4580 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4581 && !currently_reachable())
4584 switch ((declaration_kind_t) entity->declaration.kind) {
4585 case DECLARATION_KIND_LOCAL_VARIABLE:
4586 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4587 create_variable_initializer(entity);
4590 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4591 allocate_variable_length_array(entity);
4594 case DECLARATION_KIND_COMPOUND_MEMBER:
4595 case DECLARATION_KIND_GLOBAL_VARIABLE:
4596 case DECLARATION_KIND_FUNCTION:
4597 case DECLARATION_KIND_INNER_FUNCTION:
4600 case DECLARATION_KIND_PARAMETER:
4601 case DECLARATION_KIND_PARAMETER_ENTITY:
4602 panic("can't initialize parameters");
4604 case DECLARATION_KIND_UNKNOWN:
4605 panic("can't initialize unknown declaration");
4607 panic("invalid declaration kind");
4610 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4612 entity_t *entity = statement->declarations_begin;
4616 entity_t *const last = statement->declarations_end;
4617 for ( ;; entity = entity->base.next) {
4618 if (is_declaration(entity)) {
4619 initialize_local_declaration(entity);
4620 } else if (entity->kind == ENTITY_TYPEDEF) {
4621 /* ยง6.7.7:3 Any array size expressions associated with variable length
4622 * array declarators are evaluated each time the declaration of the
4623 * typedef name is reached in the order of execution. */
4624 type_t *const type = skip_typeref(entity->typedefe.type);
4625 if (is_type_array(type) && type->array.is_vla)
4626 get_vla_size(&type->array);
4635 static ir_node *if_statement_to_firm(if_statement_t *statement)
4637 /* Create the condition. */
4638 ir_node *true_block = NULL;
4639 ir_node *false_block = NULL;
4640 if (currently_reachable()) {
4641 true_block = new_immBlock();
4642 false_block = new_immBlock();
4643 create_condition_evaluation(statement->condition, true_block, false_block);
4644 mature_immBlock(true_block);
4645 mature_immBlock(false_block);
4648 /* Create the true statement. */
4649 set_cur_block(true_block);
4650 statement_to_firm(statement->true_statement);
4651 ir_node *fallthrough_block = get_cur_block();
4653 /* Create the false statement. */
4654 set_cur_block(false_block);
4655 if (statement->false_statement != NULL) {
4656 statement_to_firm(statement->false_statement);
4659 /* Handle the block after the if-statement. Minor simplification and
4660 * optimisation: Reuse the false/true block as fallthrough block, if the
4661 * true/false statement does not pass control to the fallthrough block, e.g.
4662 * in the typical if (x) return; pattern. */
4663 if (fallthrough_block) {
4664 if (currently_reachable()) {
4665 ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4666 ir_node *const f_jump = new_Jmp();
4667 ir_node *const in[] = { t_jump, f_jump };
4668 fallthrough_block = new_Block(2, in);
4670 set_cur_block(fallthrough_block);
4677 * Add an unconditional jump to the target block. If the source block is not
4678 * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4679 * loops. This is necessary if the jump potentially enters a loop.
4681 static void jump_to(ir_node *const target_block)
4683 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4684 add_immBlock_pred(target_block, pred);
4688 * Add an unconditional jump to the target block, if the current block is
4689 * reachable and do nothing otherwise. This is only valid if the jump does not
4690 * enter a loop (a back edge is ok).
4692 static void jump_if_reachable(ir_node *const target_block)
4694 if (currently_reachable())
4695 add_immBlock_pred(target_block, new_Jmp());
4698 static ir_node *while_statement_to_firm(while_statement_t *statement)
4700 /* Create the header block */
4701 ir_node *const header_block = new_immBlock();
4702 jump_to(header_block);
4704 /* Create the condition. */
4705 ir_node * body_block;
4706 ir_node * false_block;
4707 expression_t *const cond = statement->condition;
4708 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4709 fold_constant_to_bool(cond)) {
4710 /* Shortcut for while (true). */
4711 body_block = header_block;
4714 keep_alive(header_block);
4715 keep_all_memory(header_block);
4717 body_block = new_immBlock();
4718 false_block = new_immBlock();
4720 set_cur_block(header_block);
4721 create_condition_evaluation(cond, body_block, false_block);
4722 mature_immBlock(body_block);
4725 ir_node *const old_continue_label = continue_label;
4726 ir_node *const old_break_label = break_label;
4727 continue_label = header_block;
4728 break_label = false_block;
4730 /* Create the loop body. */
4731 set_cur_block(body_block);
4732 statement_to_firm(statement->body);
4733 jump_if_reachable(header_block);
4735 mature_immBlock(header_block);
4736 assert(false_block == NULL || false_block == break_label);
4737 false_block = break_label;
4738 if (false_block != NULL) {
4739 mature_immBlock(false_block);
4741 set_cur_block(false_block);
4743 assert(continue_label == header_block);
4744 continue_label = old_continue_label;
4745 break_label = old_break_label;
4749 static ir_node *get_break_label(void)
4751 if (break_label == NULL) {
4752 break_label = new_immBlock();
4757 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4759 /* create the header block */
4760 ir_node *header_block = new_immBlock();
4763 ir_node *body_block = new_immBlock();
4764 jump_to(body_block);
4766 ir_node *old_continue_label = continue_label;
4767 ir_node *old_break_label = break_label;
4768 continue_label = header_block;
4771 set_cur_block(body_block);
4772 statement_to_firm(statement->body);
4773 ir_node *const false_block = get_break_label();
4775 assert(continue_label == header_block);
4776 continue_label = old_continue_label;
4777 break_label = old_break_label;
4779 jump_if_reachable(header_block);
4781 /* create the condition */
4782 mature_immBlock(header_block);
4783 set_cur_block(header_block);
4785 create_condition_evaluation(statement->condition, body_block, false_block);
4786 mature_immBlock(body_block);
4787 mature_immBlock(false_block);
4789 set_cur_block(false_block);
4793 static ir_node *for_statement_to_firm(for_statement_t *statement)
4795 /* create declarations */
4796 entity_t *entity = statement->scope.entities;
4797 for ( ; entity != NULL; entity = entity->base.next) {
4798 if (!is_declaration(entity))
4801 create_local_declaration(entity);
4804 if (currently_reachable()) {
4805 entity = statement->scope.entities;
4806 for ( ; entity != NULL; entity = entity->base.next) {
4807 if (!is_declaration(entity))
4810 initialize_local_declaration(entity);
4813 if (statement->initialisation != NULL) {
4814 expression_to_firm(statement->initialisation);
4818 /* Create the header block */
4819 ir_node *const header_block = new_immBlock();
4820 jump_to(header_block);
4822 /* Create the condition. */
4823 ir_node *body_block;
4824 ir_node *false_block;
4825 if (statement->condition != NULL) {
4826 body_block = new_immBlock();
4827 false_block = new_immBlock();
4829 set_cur_block(header_block);
4830 create_condition_evaluation(statement->condition, body_block, false_block);
4831 mature_immBlock(body_block);
4834 body_block = header_block;
4837 keep_alive(header_block);
4838 keep_all_memory(header_block);
4841 /* Create the step block, if necessary. */
4842 ir_node * step_block = header_block;
4843 expression_t *const step = statement->step;
4845 step_block = new_immBlock();
4848 ir_node *const old_continue_label = continue_label;
4849 ir_node *const old_break_label = break_label;
4850 continue_label = step_block;
4851 break_label = false_block;
4853 /* Create the loop body. */
4854 set_cur_block(body_block);
4855 statement_to_firm(statement->body);
4856 jump_if_reachable(step_block);
4858 /* Create the step code. */
4860 mature_immBlock(step_block);
4861 set_cur_block(step_block);
4862 expression_to_firm(step);
4863 jump_if_reachable(header_block);
4866 mature_immBlock(header_block);
4867 assert(false_block == NULL || false_block == break_label);
4868 false_block = break_label;
4869 if (false_block != NULL) {
4870 mature_immBlock(false_block);
4872 set_cur_block(false_block);
4874 assert(continue_label == step_block);
4875 continue_label = old_continue_label;
4876 break_label = old_break_label;
4880 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4882 if (!currently_reachable())
4885 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4886 ir_node *jump = new_d_Jmp(dbgi);
4887 add_immBlock_pred(target_block, jump);
4889 set_unreachable_now();
4893 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4895 /* determine number of cases */
4897 for (case_label_statement_t *l = statement->first_case; l != NULL;
4900 if (l->expression == NULL)
4902 if (l->is_empty_range)
4907 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4909 for (case_label_statement_t *l = statement->first_case; l != NULL;
4911 if (l->expression == NULL) {
4912 l->pn = pn_Switch_default;
4915 if (l->is_empty_range)
4917 ir_tarval *min = fold_constant_to_tarval(l->expression);
4918 ir_tarval *max = min;
4919 long pn = (long) i+1;
4920 if (l->end_range != NULL)
4921 max = fold_constant_to_tarval(l->end_range);
4922 ir_switch_table_set(res, i++, min, max, pn);
4928 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4930 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4931 ir_node *switch_node = NULL;
4933 if (currently_reachable()) {
4934 ir_node *expression = expression_to_firm(statement->expression);
4935 ir_switch_table *table = create_switch_table(statement);
4936 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4938 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4941 set_unreachable_now();
4943 ir_node *const old_switch = current_switch;
4944 ir_node *const old_break_label = break_label;
4945 const bool old_saw_default_label = saw_default_label;
4946 saw_default_label = false;
4947 current_switch = switch_node;
4950 statement_to_firm(statement->body);
4952 if (currently_reachable()) {
4953 add_immBlock_pred(get_break_label(), new_Jmp());
4956 if (!saw_default_label && switch_node) {
4957 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4958 add_immBlock_pred(get_break_label(), proj);
4961 if (break_label != NULL) {
4962 mature_immBlock(break_label);
4964 set_cur_block(break_label);
4966 assert(current_switch == switch_node);
4967 current_switch = old_switch;
4968 break_label = old_break_label;
4969 saw_default_label = old_saw_default_label;
4973 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4975 if (statement->is_empty_range)
4978 if (current_switch != NULL) {
4979 ir_node *block = new_immBlock();
4980 /* Fallthrough from previous case */
4981 jump_if_reachable(block);
4983 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4984 add_immBlock_pred(block, proj);
4985 if (statement->expression == NULL)
4986 saw_default_label = true;
4988 mature_immBlock(block);
4989 set_cur_block(block);
4992 return statement_to_firm(statement->statement);
4995 static ir_node *label_to_firm(const label_statement_t *statement)
4997 ir_node *block = get_label_block(statement->label);
5000 set_cur_block(block);
5002 keep_all_memory(block);
5004 return statement_to_firm(statement->statement);
5007 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5009 if (!currently_reachable())
5012 ir_node *const irn = expression_to_firm(statement->expression);
5013 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5014 ir_node *const ijmp = new_d_IJmp(dbgi, irn);
5016 set_irn_link(ijmp, ijmp_list);
5019 set_unreachable_now();
5023 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5025 bool needs_memory = false;
5027 if (statement->is_volatile) {
5028 needs_memory = true;
5031 size_t n_clobbers = 0;
5032 asm_clobber_t *clobber = statement->clobbers;
5033 for ( ; clobber != NULL; clobber = clobber->next) {
5034 const char *clobber_str = clobber->clobber.begin;
5036 if (!be_is_valid_clobber(clobber_str)) {
5037 errorf(&statement->base.source_position,
5038 "invalid clobber '%s' specified", clobber->clobber);
5042 if (streq(clobber_str, "memory")) {
5043 needs_memory = true;
5047 ident *id = new_id_from_str(clobber_str);
5048 obstack_ptr_grow(&asm_obst, id);
5051 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5052 ident **clobbers = NULL;
5053 if (n_clobbers > 0) {
5054 clobbers = obstack_finish(&asm_obst);
5057 size_t n_inputs = 0;
5058 asm_argument_t *argument = statement->inputs;
5059 for ( ; argument != NULL; argument = argument->next)
5061 size_t n_outputs = 0;
5062 argument = statement->outputs;
5063 for ( ; argument != NULL; argument = argument->next)
5066 unsigned next_pos = 0;
5068 ir_node *ins[n_inputs + n_outputs + 1];
5071 ir_asm_constraint tmp_in_constraints[n_outputs];
5073 const expression_t *out_exprs[n_outputs];
5074 ir_node *out_addrs[n_outputs];
5075 size_t out_size = 0;
5077 argument = statement->outputs;
5078 for ( ; argument != NULL; argument = argument->next) {
5079 const char *constraints = argument->constraints.begin;
5080 asm_constraint_flags_t asm_flags
5081 = be_parse_asm_constraints(constraints);
5084 source_position_t const *const pos = &statement->base.source_position;
5085 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5086 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5088 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5089 errorf(pos, "some constraints in '%s' are invalid", constraints);
5092 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5093 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5098 unsigned pos = next_pos++;
5099 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5100 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5101 expression_t *expr = argument->expression;
5102 ir_node *addr = expression_to_addr(expr);
5103 /* in+output, construct an artifical same_as constraint on the
5105 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5107 ir_node *value = get_value_from_lvalue(expr, addr);
5109 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5111 ir_asm_constraint constraint;
5112 constraint.pos = pos;
5113 constraint.constraint = new_id_from_str(buf);
5114 constraint.mode = get_ir_mode_storage(expr->base.type);
5115 tmp_in_constraints[in_size] = constraint;
5116 ins[in_size] = value;
5121 out_exprs[out_size] = expr;
5122 out_addrs[out_size] = addr;
5124 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5125 /* pure memory ops need no input (but we have to make sure we
5126 * attach to the memory) */
5127 assert(! (asm_flags &
5128 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5129 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5130 needs_memory = true;
5132 /* we need to attach the address to the inputs */
5133 expression_t *expr = argument->expression;
5135 ir_asm_constraint constraint;
5136 constraint.pos = pos;
5137 constraint.constraint = new_id_from_str(constraints);
5138 constraint.mode = mode_M;
5139 tmp_in_constraints[in_size] = constraint;
5141 ins[in_size] = expression_to_addr(expr);
5145 errorf(&statement->base.source_position,
5146 "only modifiers but no place set in constraints '%s'",
5151 ir_asm_constraint constraint;
5152 constraint.pos = pos;
5153 constraint.constraint = new_id_from_str(constraints);
5154 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5156 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5158 assert(obstack_object_size(&asm_obst)
5159 == out_size * sizeof(ir_asm_constraint));
5160 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5163 obstack_grow(&asm_obst, tmp_in_constraints,
5164 in_size * sizeof(tmp_in_constraints[0]));
5165 /* find and count input and output arguments */
5166 argument = statement->inputs;
5167 for ( ; argument != NULL; argument = argument->next) {
5168 const char *constraints = argument->constraints.begin;
5169 asm_constraint_flags_t asm_flags
5170 = be_parse_asm_constraints(constraints);
5172 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5173 errorf(&statement->base.source_position,
5174 "some constraints in '%s' are not supported", constraints);
5177 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5178 errorf(&statement->base.source_position,
5179 "some constraints in '%s' are invalid", constraints);
5182 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5183 errorf(&statement->base.source_position,
5184 "write flag specified for input constraints '%s'",
5190 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5191 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5192 /* we can treat this as "normal" input */
5193 input = expression_to_firm(argument->expression);
5194 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5195 /* pure memory ops need no input (but we have to make sure we
5196 * attach to the memory) */
5197 assert(! (asm_flags &
5198 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5199 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5200 needs_memory = true;
5201 input = expression_to_addr(argument->expression);
5203 errorf(&statement->base.source_position,
5204 "only modifiers but no place set in constraints '%s'",
5209 ir_asm_constraint constraint;
5210 constraint.pos = next_pos++;
5211 constraint.constraint = new_id_from_str(constraints);
5212 constraint.mode = get_irn_mode(input);
5214 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5215 ins[in_size++] = input;
5219 ir_asm_constraint constraint;
5220 constraint.pos = next_pos++;
5221 constraint.constraint = new_id_from_str("");
5222 constraint.mode = mode_M;
5224 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5225 ins[in_size++] = get_store();
5228 assert(obstack_object_size(&asm_obst)
5229 == in_size * sizeof(ir_asm_constraint));
5230 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5232 /* create asm node */
5233 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5235 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5237 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5238 out_size, output_constraints,
5239 n_clobbers, clobbers, asm_text);
5241 if (statement->is_volatile) {
5242 set_irn_pinned(node, op_pin_state_pinned);
5244 set_irn_pinned(node, op_pin_state_floats);
5247 /* create output projs & connect them */
5249 ir_node *projm = new_Proj(node, mode_M, out_size);
5254 for (i = 0; i < out_size; ++i) {
5255 const expression_t *out_expr = out_exprs[i];
5257 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5258 ir_node *proj = new_Proj(node, mode, pn);
5259 ir_node *addr = out_addrs[i];
5261 set_value_for_expression_addr(out_expr, proj, addr);
5267 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5269 statement_to_firm(statement->try_statement);
5270 source_position_t const *const pos = &statement->base.source_position;
5271 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5275 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5277 errorf(&statement->base.source_position, "__leave not supported yet");
5282 * Transform a statement.
5284 static ir_node *statement_to_firm(statement_t *const stmt)
5287 assert(!stmt->base.transformed);
5288 stmt->base.transformed = true;
5291 switch (stmt->kind) {
5292 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5293 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5294 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5295 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5296 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5297 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5298 case STATEMENT_EMPTY: return NULL; /* nothing */
5299 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5300 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5301 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5302 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5303 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5304 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5305 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5306 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5307 case STATEMENT_WHILE: return while_statement_to_firm( &stmt->whiles);
5309 case STATEMENT_BREAK: return create_jump_statement(stmt, get_break_label());
5310 case STATEMENT_CONTINUE: return create_jump_statement(stmt, continue_label);
5311 case STATEMENT_GOTO: return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5313 case STATEMENT_ERROR: panic("error statement found");
5315 panic("statement not implemented");
5318 static int count_local_variables(const entity_t *entity,
5319 const entity_t *const last)
5322 entity_t const *const end = last != NULL ? last->base.next : NULL;
5323 for (; entity != end; entity = entity->base.next) {
5327 if (entity->kind == ENTITY_VARIABLE) {
5328 type = skip_typeref(entity->declaration.type);
5329 address_taken = entity->variable.address_taken;
5330 } else if (entity->kind == ENTITY_PARAMETER) {
5331 type = skip_typeref(entity->declaration.type);
5332 address_taken = entity->parameter.address_taken;
5337 if (!address_taken && is_type_scalar(type))
5343 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5345 int *const count = env;
5347 switch (stmt->kind) {
5348 case STATEMENT_DECLARATION: {
5349 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5350 *count += count_local_variables(decl_stmt->declarations_begin,
5351 decl_stmt->declarations_end);
5356 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5365 * Return the number of local (alias free) variables used by a function.
5367 static int get_function_n_local_vars(entity_t *entity)
5369 const function_t *function = &entity->function;
5372 /* count parameters */
5373 count += count_local_variables(function->parameters.entities, NULL);
5375 /* count local variables declared in body */
5376 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5381 * Build Firm code for the parameters of a function.
5383 static void initialize_function_parameters(entity_t *entity)
5385 assert(entity->kind == ENTITY_FUNCTION);
5386 ir_graph *irg = current_ir_graph;
5387 ir_node *args = get_irg_args(irg);
5389 ir_type *function_irtype;
5391 if (entity->function.need_closure) {
5392 /* add an extra parameter for the static link */
5393 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5396 /* Matze: IMO this is wrong, nested functions should have an own
5397 * type and not rely on strange parameters... */
5398 function_irtype = create_method_type(&entity->declaration.type->function, true);
5400 function_irtype = get_ir_type(entity->declaration.type);
5405 entity_t *parameter = entity->function.parameters.entities;
5406 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5407 if (parameter->kind != ENTITY_PARAMETER)
5410 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5411 type_t *type = skip_typeref(parameter->declaration.type);
5413 bool needs_entity = parameter->parameter.address_taken;
5414 assert(!is_type_array(type));
5415 if (is_type_compound(type)) {
5416 needs_entity = true;
5419 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5421 ir_type *frame_type = get_irg_frame_type(irg);
5423 = new_parameter_entity(frame_type, n, param_irtype);
5424 parameter->declaration.kind
5425 = DECLARATION_KIND_PARAMETER_ENTITY;
5426 parameter->parameter.v.entity = param;
5430 ir_mode *param_mode = get_type_mode(param_irtype);
5432 ir_node *value = new_r_Proj(args, param_mode, pn);
5434 ir_mode *mode = get_ir_mode_storage(type);
5435 value = create_conv(NULL, value, mode);
5436 value = do_strict_conv(NULL, value);
5438 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5439 parameter->parameter.v.value_number = next_value_number_function;
5440 set_irg_loc_description(current_ir_graph, next_value_number_function,
5442 ++next_value_number_function;
5444 set_value(parameter->parameter.v.value_number, value);
5449 * Handle additional decl modifiers for IR-graphs
5451 * @param irg the IR-graph
5452 * @param dec_modifiers additional modifiers
5454 static void handle_decl_modifier_irg(ir_graph *irg,
5455 decl_modifiers_t decl_modifiers)
5457 if (decl_modifiers & DM_NAKED) {
5458 /* TRUE if the declaration includes the Microsoft
5459 __declspec(naked) specifier. */
5460 add_irg_additional_properties(irg, mtp_property_naked);
5462 if (decl_modifiers & DM_FORCEINLINE) {
5463 /* TRUE if the declaration includes the
5464 Microsoft __forceinline specifier. */
5465 set_irg_inline_property(irg, irg_inline_forced);
5467 if (decl_modifiers & DM_NOINLINE) {
5468 /* TRUE if the declaration includes the Microsoft
5469 __declspec(noinline) specifier. */
5470 set_irg_inline_property(irg, irg_inline_forbidden);
5474 static void add_function_pointer(ir_type *segment, ir_entity *method,
5475 const char *unique_template)
5477 ir_type *method_type = get_entity_type(method);
5478 ir_type *ptr_type = new_type_pointer(method_type);
5480 /* these entities don't really have a name but firm only allows
5482 * Note that we mustn't give these entities a name since for example
5483 * Mach-O doesn't allow them. */
5484 ident *ide = id_unique(unique_template);
5485 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5486 ir_graph *irg = get_const_code_irg();
5487 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5490 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5491 set_entity_compiler_generated(ptr, 1);
5492 set_entity_visibility(ptr, ir_visibility_private);
5493 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5494 set_atomic_ent_value(ptr, val);
5498 * Generate possible IJmp branches to a given label block.
5500 static void gen_ijmp_branches(ir_node *block)
5503 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5504 add_immBlock_pred(block, ijmp);
5509 * Create code for a function and all inner functions.
5511 * @param entity the function entity
5513 static void create_function(entity_t *entity)
5515 assert(entity->kind == ENTITY_FUNCTION);
5516 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5518 if (entity->function.statement == NULL)
5521 inner_functions = NULL;
5522 current_trampolines = NULL;
5524 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5525 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5526 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5528 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5529 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5530 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5533 current_function_entity = entity;
5534 current_function_name = NULL;
5535 current_funcsig = NULL;
5537 assert(all_labels == NULL);
5538 all_labels = NEW_ARR_F(label_t *, 0);
5541 int n_local_vars = get_function_n_local_vars(entity);
5542 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5543 current_ir_graph = irg;
5545 ir_graph *old_current_function = current_function;
5546 current_function = irg;
5548 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5549 current_vararg_entity = NULL;
5551 set_irg_fp_model(irg, firm_fp_model);
5552 tarval_enable_fp_ops(1);
5553 set_irn_dbg_info(get_irg_start_block(irg),
5554 get_entity_dbg_info(function_entity));
5556 /* set inline flags */
5557 if (entity->function.is_inline)
5558 set_irg_inline_property(irg, irg_inline_recomended);
5559 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5561 next_value_number_function = 0;
5562 initialize_function_parameters(entity);
5563 current_static_link = entity->function.static_link;
5565 statement_to_firm(entity->function.statement);
5567 ir_node *end_block = get_irg_end_block(irg);
5569 /* do we have a return statement yet? */
5570 if (currently_reachable()) {
5571 type_t *type = skip_typeref(entity->declaration.type);
5572 assert(is_type_function(type));
5573 type_t *const return_type = skip_typeref(type->function.return_type);
5576 if (is_type_void(return_type)) {
5577 ret = new_Return(get_store(), 0, NULL);
5579 ir_mode *const mode = get_ir_mode_storage(return_type);
5582 /* ยง5.1.2.2.3 main implicitly returns 0 */
5583 if (is_main(entity)) {
5584 in[0] = new_Const(get_mode_null(mode));
5586 in[0] = new_Unknown(mode);
5588 ret = new_Return(get_store(), 1, in);
5590 add_immBlock_pred(end_block, ret);
5593 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5594 label_t *label = all_labels[i];
5595 if (label->address_taken) {
5596 gen_ijmp_branches(label->block);
5598 mature_immBlock(label->block);
5601 DEL_ARR_F(all_labels);
5604 irg_finalize_cons(irg);
5606 /* finalize the frame type */
5607 ir_type *frame_type = get_irg_frame_type(irg);
5608 int n = get_compound_n_members(frame_type);
5611 for (int i = 0; i < n; ++i) {
5612 ir_entity *member = get_compound_member(frame_type, i);
5613 ir_type *entity_type = get_entity_type(member);
5615 int align = get_type_alignment_bytes(entity_type);
5616 if (align > align_all)
5620 misalign = offset % align;
5622 offset += align - misalign;
5626 set_entity_offset(member, offset);
5627 offset += get_type_size_bytes(entity_type);
5629 set_type_size_bytes(frame_type, offset);
5630 set_type_alignment_bytes(frame_type, align_all);
5632 irg_verify(irg, VERIFY_ENFORCE_SSA);
5633 current_vararg_entity = old_current_vararg_entity;
5634 current_function = old_current_function;
5636 if (current_trampolines != NULL) {
5637 DEL_ARR_F(current_trampolines);
5638 current_trampolines = NULL;
5641 /* create inner functions if any */
5642 entity_t **inner = inner_functions;
5643 if (inner != NULL) {
5644 ir_type *rem_outer_frame = current_outer_frame;
5645 current_outer_frame = get_irg_frame_type(current_ir_graph);
5646 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5647 create_function(inner[i]);
5651 current_outer_frame = rem_outer_frame;
5655 static void scope_to_firm(scope_t *scope)
5657 /* first pass: create declarations */
5658 entity_t *entity = scope->entities;
5659 for ( ; entity != NULL; entity = entity->base.next) {
5660 if (entity->base.symbol == NULL)
5663 if (entity->kind == ENTITY_FUNCTION) {
5664 if (entity->function.btk != BUILTIN_NONE) {
5665 /* builtins have no representation */
5668 (void)get_function_entity(entity, NULL);
5669 } else if (entity->kind == ENTITY_VARIABLE) {
5670 create_global_variable(entity);
5671 } else if (entity->kind == ENTITY_NAMESPACE) {
5672 scope_to_firm(&entity->namespacee.members);
5676 /* second pass: create code/initializers */
5677 entity = scope->entities;
5678 for ( ; entity != NULL; entity = entity->base.next) {
5679 if (entity->base.symbol == NULL)
5682 if (entity->kind == ENTITY_FUNCTION) {
5683 if (entity->function.btk != BUILTIN_NONE) {
5684 /* builtins have no representation */
5687 create_function(entity);
5688 } else if (entity->kind == ENTITY_VARIABLE) {
5689 assert(entity->declaration.kind
5690 == DECLARATION_KIND_GLOBAL_VARIABLE);
5691 current_ir_graph = get_const_code_irg();
5692 create_variable_initializer(entity);
5697 void init_ast2firm(void)
5699 obstack_init(&asm_obst);
5700 init_atomic_modes();
5702 ir_set_debug_retrieve(dbg_retrieve);
5703 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5705 /* create idents for all known runtime functions */
5706 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5707 rts_idents[i] = new_id_from_str(rts_data[i].name);
5710 entitymap_init(&entitymap);
5713 static void init_ir_types(void)
5715 static int ir_types_initialized = 0;
5716 if (ir_types_initialized)
5718 ir_types_initialized = 1;
5720 ir_type_char = get_ir_type(type_char);
5721 ir_type_const_char = get_ir_type(type_const_char);
5722 ir_type_wchar_t = get_ir_type(type_wchar_t);
5724 be_params = be_get_backend_param();
5725 mode_float_arithmetic = be_params->mode_float_arithmetic;
5727 stack_param_align = be_params->stack_param_align;
5730 void exit_ast2firm(void)
5732 entitymap_destroy(&entitymap);
5733 obstack_free(&asm_obst, NULL);
5736 static void global_asm_to_firm(statement_t *s)
5738 for (; s != NULL; s = s->base.next) {
5739 assert(s->kind == STATEMENT_ASM);
5741 char const *const text = s->asms.asm_text.begin;
5742 size_t size = s->asms.asm_text.size;
5744 /* skip the last \0 */
5745 if (text[size - 1] == '\0')
5748 ident *const id = new_id_from_chars(text, size);
5753 static const char *get_cwd(void)
5755 static char buf[1024];
5757 getcwd(buf, sizeof(buf));
5761 void translation_unit_to_firm(translation_unit_t *unit)
5763 if (c_mode & _CXX) {
5764 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5765 } else if (c_mode & _C99) {
5766 be_dwarf_set_source_language(DW_LANG_C99);
5767 } else if (c_mode & _C89) {
5768 be_dwarf_set_source_language(DW_LANG_C89);
5770 be_dwarf_set_source_language(DW_LANG_C);
5772 be_dwarf_set_compilation_directory(get_cwd());
5774 /* initialize firm arithmetic */
5775 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5776 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5778 /* just to be sure */
5779 continue_label = NULL;
5781 current_switch = NULL;
5782 current_translation_unit = unit;
5786 scope_to_firm(&unit->scope);
5787 global_asm_to_firm(unit->global_asm);
5789 current_ir_graph = NULL;
5790 current_translation_unit = NULL;