2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
42 #include "diagnostic.h"
43 #include "lang_features.h"
45 #include "type_hash.h"
47 #include "walk_statements.h"
50 #include "entitymap_t.h"
51 #include "driver/firm_opt.h"
52 #include "driver/firm_cmdline.h"
54 typedef struct trampoline_region trampoline_region;
55 struct trampoline_region {
56 ir_entity *function; /**< The function that is called by this trampoline */
57 ir_entity *region; /**< created region for the trampoline */
60 static const backend_params *be_params;
62 static ir_type *ir_type_char;
63 static ir_type *ir_type_const_char;
64 static ir_type *ir_type_wchar_t;
65 static ir_type *ir_type_void;
66 static ir_type *ir_type_int;
68 /* architecture specific floating point arithmetic mode (if any) */
69 static ir_mode *mode_float_arithmetic;
71 /* alignment of stack parameters */
72 static unsigned stack_param_align;
74 static int next_value_number_function;
75 static ir_node *continue_label;
76 static ir_node *break_label;
77 static ir_node *current_switch_cond;
78 static bool saw_default_label;
79 static label_t **all_labels;
80 static entity_t **inner_functions;
81 static ir_node *ijmp_list;
82 static bool constant_folding;
83 static bool initializer_use_bitfield_basetype;
85 extern bool have_const_functions;
87 static const entity_t *current_function_entity;
88 static ir_node *current_function_name;
89 static ir_node *current_funcsig;
90 static switch_statement_t *current_switch;
91 static ir_graph *current_function;
92 static translation_unit_t *current_translation_unit;
93 static trampoline_region *current_trampolines;
94 static ir_type *current_outer_frame;
95 static ir_type *current_outer_value_type;
96 static ir_node *current_static_link;
98 static entitymap_t entitymap;
100 static struct obstack asm_obst;
102 typedef enum declaration_kind_t {
103 DECLARATION_KIND_UNKNOWN,
104 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
105 DECLARATION_KIND_GLOBAL_VARIABLE,
106 DECLARATION_KIND_LOCAL_VARIABLE,
107 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
108 DECLARATION_KIND_PARAMETER,
109 DECLARATION_KIND_PARAMETER_ENTITY,
110 DECLARATION_KIND_FUNCTION,
111 DECLARATION_KIND_COMPOUND_MEMBER,
112 DECLARATION_KIND_INNER_FUNCTION
113 } declaration_kind_t;
115 static ir_mode *get_ir_mode_storage(type_t *type);
117 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
118 * int that it returns bigger modes for floating point on some platforms
119 * (x87 internally does arithemtic with 80bits)
121 static ir_mode *get_ir_mode_arithmetic(type_t *type);
123 static ir_type *get_ir_type_incomplete(type_t *type);
125 static void enqueue_inner_function(entity_t *entity)
127 if (inner_functions == NULL)
128 inner_functions = NEW_ARR_F(entity_t *, 0);
129 ARR_APP1(entity_t*, inner_functions, entity);
132 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
134 const entity_t *entity = get_irg_loc_description(irg, pos);
136 if (entity != NULL) {
137 warningf(&entity->base.source_position,
138 "%s '%#T' might be used uninitialized",
139 get_entity_kind_name(entity->kind),
140 entity->declaration.type, entity->base.symbol);
142 return new_r_Unknown(irg, mode);
145 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
147 const source_position_t *pos = (const source_position_t*) dbg;
152 return pos->input_name;
155 static dbg_info *get_dbg_info(const source_position_t *pos)
157 return (dbg_info*) pos;
160 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
161 const type_dbg_info *dbg)
164 print_to_buffer(buffer, buffer_size);
165 const type_t *type = (const type_t*) dbg;
167 finish_print_to_buffer();
170 static type_dbg_info *get_type_dbg_info_(const type_t *type)
172 return (type_dbg_info*) type;
175 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
177 static ir_mode *mode_int, *mode_uint;
179 static ir_node *_expression_to_firm(const expression_t *expression);
180 static ir_node *expression_to_firm(const expression_t *expression);
181 static void create_local_declaration(entity_t *entity);
183 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
185 unsigned flags = get_atomic_type_flags(kind);
186 unsigned size = get_atomic_type_size(kind);
187 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
188 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
191 unsigned bit_size = size * 8;
192 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
193 unsigned modulo_shift;
194 ir_mode_arithmetic arithmetic;
196 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
197 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
198 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
200 sort = irms_int_number;
201 arithmetic = irma_twos_complement;
202 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
204 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
205 snprintf(name, sizeof(name), "F%u", bit_size);
206 sort = irms_float_number;
207 arithmetic = irma_ieee754;
210 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
218 * Initialises the atomic modes depending on the machine size.
220 static void init_atomic_modes(void)
222 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
223 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
225 mode_int = atomic_modes[ATOMIC_TYPE_INT];
226 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
228 /* there's no real void type in firm */
229 atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
231 /* initialize pointer modes */
233 ir_mode_sort sort = irms_reference;
234 unsigned bit_size = machine_size;
236 ir_mode_arithmetic arithmetic = irma_twos_complement;
237 unsigned modulo_shift
238 = bit_size < machine_size ? machine_size : bit_size;
240 snprintf(name, sizeof(name), "p%u", machine_size);
241 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
244 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
245 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
247 /* Hmm, pointers should be machine size */
248 set_modeP_data(ptr_mode);
249 set_modeP_code(ptr_mode);
252 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
254 assert(kind <= ATOMIC_TYPE_LAST);
255 return atomic_modes[kind];
258 static ir_node *get_vla_size(array_type_t *const type)
260 ir_node *size_node = type->size_node;
261 if (size_node == NULL) {
262 size_node = expression_to_firm(type->size_expression);
263 type->size_node = size_node;
269 * Return a node representing the size of a type.
271 static ir_node *get_type_size_node(type_t *type)
273 type = skip_typeref(type);
275 if (is_type_array(type) && type->array.is_vla) {
276 ir_node *size_node = get_vla_size(&type->array);
277 ir_node *elem_size = get_type_size_node(type->array.element_type);
278 ir_mode *mode = get_irn_mode(size_node);
279 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
283 ir_mode *mode = get_ir_mode_storage(type_size_t);
285 sym.type_p = get_ir_type(type);
286 return new_SymConst(mode, sym, symconst_type_size);
289 static unsigned count_parameters(const function_type_t *function_type)
293 function_parameter_t *parameter = function_type->parameters;
294 for ( ; parameter != NULL; parameter = parameter->next) {
302 * Creates a Firm type for an atomic type
304 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
306 ir_mode *mode = atomic_modes[akind];
307 type_dbg_info *dbgi = get_type_dbg_info_(type);
308 ir_type *irtype = new_d_type_primitive(mode, dbgi);
309 il_alignment_t alignment = get_atomic_type_alignment(akind);
311 set_type_alignment_bytes(irtype, alignment);
317 * Creates a Firm type for a complex type
319 static ir_type *create_complex_type(const complex_type_t *type)
321 atomic_type_kind_t kind = type->akind;
322 ir_mode *mode = atomic_modes[kind];
323 ident *id = get_mode_ident(mode);
327 /* FIXME: finish the array */
332 * Creates a Firm type for an imaginary type
334 static ir_type *create_imaginary_type(imaginary_type_t *type)
336 return create_atomic_type(type->akind, (const type_t*) type);
340 * return type of a parameter (and take transparent union gnu extension into
343 static type_t *get_parameter_type(type_t *orig_type)
345 type_t *type = skip_typeref(orig_type);
346 if (is_type_union(type)
347 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
348 compound_t *compound = type->compound.compound;
349 type = compound->members.entities->declaration.type;
355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
357 type_t *return_type = skip_typeref(function_type->return_type);
359 int n_parameters = count_parameters(function_type)
360 + (for_closure ? 1 : 0);
361 int n_results = return_type == type_void ? 0 : 1;
362 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
363 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
365 if (return_type != type_void) {
366 ir_type *restype = get_ir_type(return_type);
367 set_method_res_type(irtype, 0, restype);
370 function_parameter_t *parameter = function_type->parameters;
373 ir_type *p_irtype = get_ir_type(type_void_ptr);
374 set_method_param_type(irtype, n, p_irtype);
377 for ( ; parameter != NULL; parameter = parameter->next) {
378 type_t *type = get_parameter_type(parameter->type);
379 ir_type *p_irtype = get_ir_type(type);
380 set_method_param_type(irtype, n, p_irtype);
384 bool is_variadic = function_type->variadic;
387 set_method_variadicity(irtype, variadicity_variadic);
389 unsigned cc = get_method_calling_convention(irtype);
390 switch (function_type->calling_convention) {
391 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
394 set_method_calling_convention(irtype, SET_CDECL(cc));
401 /* only non-variadic function can use stdcall, else use cdecl */
402 set_method_calling_convention(irtype, SET_STDCALL(cc));
408 /* only non-variadic function can use fastcall, else use cdecl */
409 set_method_calling_convention(irtype, SET_FASTCALL(cc));
413 /* Hmm, leave default, not accepted by the parser yet. */
418 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
423 static ir_type *create_pointer_type(pointer_type_t *type)
425 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
426 type_t *points_to = type->points_to;
427 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
428 ir_type *ir_type = new_d_type_pointer(ir_points_to, dbgi);
433 static ir_type *create_reference_type(reference_type_t *type)
435 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
436 type_t *refers_to = type->refers_to;
437 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
438 ir_type *ir_type = new_d_type_pointer(ir_refers_to, dbgi);
443 static ir_type *create_array_type(array_type_t *type)
445 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
446 type_t *element_type = type->element_type;
447 ir_type *ir_element_type = get_ir_type(element_type);
448 ir_type *ir_type = new_d_type_array(1, ir_element_type, dbgi);
450 const int align = get_type_alignment_bytes(ir_element_type);
451 set_type_alignment_bytes(ir_type, align);
453 if (type->size_constant) {
454 int n_elements = type->size;
456 set_array_bounds_int(ir_type, 0, 0, n_elements);
458 size_t elemsize = get_type_size_bytes(ir_element_type);
459 if (elemsize % align > 0) {
460 elemsize += align - (elemsize % align);
462 set_type_size_bytes(ir_type, n_elements * elemsize);
464 set_array_lower_bound_int(ir_type, 0, 0);
466 set_type_state(ir_type, layout_fixed);
472 * Return the signed integer type of size bits.
474 * @param size the size
476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
480 static ir_mode *s_modes[64 + 1] = {NULL, };
484 if (size <= 0 || size > 64)
487 mode = s_modes[size];
491 snprintf(name, sizeof(name), "bf_I%u", size);
492 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
493 size <= 32 ? 32 : size );
494 s_modes[size] = mode;
497 type_dbg_info *dbgi = get_type_dbg_info_(type);
498 res = new_d_type_primitive(mode, dbgi);
499 set_primitive_base_type(res, base_tp);
505 * Return the unsigned integer type of size bits.
507 * @param size the size
509 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
513 static ir_mode *u_modes[64 + 1] = {NULL, };
517 if (size <= 0 || size > 64)
520 mode = u_modes[size];
524 snprintf(name, sizeof(name), "bf_U%u", size);
525 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
526 size <= 32 ? 32 : size );
527 u_modes[size] = mode;
530 type_dbg_info *dbgi = get_type_dbg_info_(type);
531 res = new_d_type_primitive(mode, dbgi);
532 set_primitive_base_type(res, base_tp);
537 static ir_type *create_bitfield_type(bitfield_type_t *const type)
539 type_t *base = skip_typeref(type->base_type);
540 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
541 ir_type *irbase = get_ir_type(base);
543 unsigned size = type->bit_size;
545 assert(!is_type_float(base));
546 if (is_type_signed(base)) {
547 return get_signed_int_type_for_bit_size(irbase, size,
548 (const type_t*) type);
550 return get_unsigned_int_type_for_bit_size(irbase, size,
551 (const type_t*) type);
555 #define INVALID_TYPE ((ir_type_ptr)-1)
558 COMPOUND_IS_STRUCT = false,
559 COMPOUND_IS_UNION = true
563 * Construct firm type from ast struct type.
565 static ir_type *create_compound_type(compound_type_t *type,
566 bool incomplete, bool is_union)
568 compound_t *compound = type->compound;
570 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
571 return compound->irtype;
574 symbol_t *symbol = compound->base.symbol;
576 if (symbol != NULL) {
577 id = new_id_from_str(symbol->string);
580 id = id_unique("__anonymous_union.%u");
582 id = id_unique("__anonymous_struct.%u");
588 irtype = new_type_union(id);
590 irtype = new_type_struct(id);
593 compound->irtype_complete = false;
594 compound->irtype = irtype;
600 layout_union_type(type);
602 layout_struct_type(type);
605 compound->irtype_complete = true;
607 entity_t *entry = compound->members.entities;
608 for ( ; entry != NULL; entry = entry->base.next) {
609 if (entry->kind != ENTITY_COMPOUND_MEMBER)
612 symbol_t *symbol = entry->base.symbol;
613 type_t *entry_type = entry->declaration.type;
615 if (symbol == NULL) {
616 /* anonymous bitfield member, skip */
617 if (entry_type->kind == TYPE_BITFIELD)
619 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
620 || entry_type->kind == TYPE_COMPOUND_UNION);
621 ident = id_unique("anon.%u");
623 ident = new_id_from_str(symbol->string);
626 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
628 ir_type *entry_irtype = get_ir_type(entry_type);
629 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
631 set_entity_offset(entity, entry->compound_member.offset);
632 set_entity_offset_bits_remainder(entity,
633 entry->compound_member.bit_offset);
635 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
636 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
637 entry->compound_member.entity = entity;
640 set_type_alignment_bytes(irtype, compound->alignment);
641 set_type_size_bytes(irtype, compound->size);
642 set_type_state(irtype, layout_fixed);
647 static ir_type *create_enum_type(enum_type_t *const type)
649 type->base.firm_type = ir_type_int;
651 ir_mode *const mode = mode_int;
652 ir_tarval *const one = get_mode_one(mode);
653 ir_tarval * tv_next = get_mode_null(mode);
655 bool constant_folding_old = constant_folding;
656 constant_folding = true;
658 enum_t *enume = type->enume;
659 entity_t *entry = enume->base.next;
660 for (; entry != NULL; entry = entry->base.next) {
661 if (entry->kind != ENTITY_ENUM_VALUE)
664 expression_t *const init = entry->enum_value.value;
666 ir_node *const cnst = expression_to_firm(init);
667 if (!is_Const(cnst)) {
668 panic("couldn't fold constant");
670 tv_next = get_Const_tarval(cnst);
672 entry->enum_value.tv = tv_next;
673 tv_next = tarval_add(tv_next, one);
676 constant_folding = constant_folding_old;
678 return create_atomic_type(type->akind, (const type_t*) type);
681 static ir_type *get_ir_type_incomplete(type_t *type)
683 assert(type != NULL);
684 type = skip_typeref(type);
686 if (type->base.firm_type != NULL) {
687 assert(type->base.firm_type != INVALID_TYPE);
688 return type->base.firm_type;
691 switch (type->kind) {
692 case TYPE_COMPOUND_STRUCT:
693 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
694 case TYPE_COMPOUND_UNION:
695 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
697 return get_ir_type(type);
701 ir_type *get_ir_type(type_t *type)
703 assert(type != NULL);
705 type = skip_typeref(type);
707 if (type->base.firm_type != NULL) {
708 assert(type->base.firm_type != INVALID_TYPE);
709 return type->base.firm_type;
712 ir_type *firm_type = NULL;
713 switch (type->kind) {
715 /* Happens while constant folding, when there was an error */
716 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
719 firm_type = create_atomic_type(type->atomic.akind, type);
722 firm_type = create_complex_type(&type->complex);
725 firm_type = create_imaginary_type(&type->imaginary);
728 firm_type = create_method_type(&type->function, false);
731 firm_type = create_pointer_type(&type->pointer);
734 firm_type = create_reference_type(&type->reference);
737 firm_type = create_array_type(&type->array);
739 case TYPE_COMPOUND_STRUCT:
740 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
742 case TYPE_COMPOUND_UNION:
743 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
746 firm_type = create_enum_type(&type->enumt);
749 firm_type = get_ir_type(type->builtin.real_type);
752 firm_type = create_bitfield_type(&type->bitfield);
760 if (firm_type == NULL)
761 panic("unknown type found");
763 type->base.firm_type = firm_type;
767 static ir_mode *get_ir_mode_storage(type_t *type)
769 ir_type *irtype = get_ir_type(type);
771 /* firm doesn't report a mode for arrays somehow... */
772 if (is_Array_type(irtype)) {
776 ir_mode *mode = get_type_mode(irtype);
777 assert(mode != NULL);
781 static ir_mode *get_ir_mode_arithmetic(type_t *type)
783 ir_mode *mode = get_ir_mode_storage(type);
784 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
785 return mode_float_arithmetic;
791 /** Names of the runtime functions. */
792 static const struct {
793 int id; /**< the rts id */
794 int n_res; /**< number of return values */
795 const char *name; /**< the name of the rts function */
796 int n_params; /**< number of parameters */
797 unsigned flags; /**< language flags */
799 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
800 { rts_abort, 0, "abort", 0, _C89 },
801 { rts_alloca, 1, "alloca", 1, _ALL },
802 { rts_abs, 1, "abs", 1, _C89 },
803 { rts_labs, 1, "labs", 1, _C89 },
804 { rts_llabs, 1, "llabs", 1, _C99 },
805 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
807 { rts_fabs, 1, "fabs", 1, _C89 },
808 { rts_sqrt, 1, "sqrt", 1, _C89 },
809 { rts_cbrt, 1, "cbrt", 1, _C99 },
810 { rts_exp, 1, "exp", 1, _C89 },
811 { rts_exp2, 1, "exp2", 1, _C89 },
812 { rts_exp10, 1, "exp10", 1, _GNUC },
813 { rts_log, 1, "log", 1, _C89 },
814 { rts_log2, 1, "log2", 1, _C89 },
815 { rts_log10, 1, "log10", 1, _C89 },
816 { rts_pow, 1, "pow", 2, _C89 },
817 { rts_sin, 1, "sin", 1, _C89 },
818 { rts_cos, 1, "cos", 1, _C89 },
819 { rts_tan, 1, "tan", 1, _C89 },
820 { rts_asin, 1, "asin", 1, _C89 },
821 { rts_acos, 1, "acos", 1, _C89 },
822 { rts_atan, 1, "atan", 1, _C89 },
823 { rts_sinh, 1, "sinh", 1, _C89 },
824 { rts_cosh, 1, "cosh", 1, _C89 },
825 { rts_tanh, 1, "tanh", 1, _C89 },
827 { rts_fabsf, 1, "fabsf", 1, _C99 },
828 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
829 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
830 { rts_expf, 1, "expf", 1, _C99 },
831 { rts_exp2f, 1, "exp2f", 1, _C99 },
832 { rts_exp10f, 1, "exp10f", 1, _GNUC },
833 { rts_logf, 1, "logf", 1, _C99 },
834 { rts_log2f, 1, "log2f", 1, _C99 },
835 { rts_log10f, 1, "log10f", 1, _C99 },
836 { rts_powf, 1, "powf", 2, _C99 },
837 { rts_sinf, 1, "sinf", 1, _C99 },
838 { rts_cosf, 1, "cosf", 1, _C99 },
839 { rts_tanf, 1, "tanf", 1, _C99 },
840 { rts_asinf, 1, "asinf", 1, _C99 },
841 { rts_acosf, 1, "acosf", 1, _C99 },
842 { rts_atanf, 1, "atanf", 1, _C99 },
843 { rts_sinhf, 1, "sinhf", 1, _C99 },
844 { rts_coshf, 1, "coshf", 1, _C99 },
845 { rts_tanhf, 1, "tanhf", 1, _C99 },
847 { rts_fabsl, 1, "fabsl", 1, _C99 },
848 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
849 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
850 { rts_expl, 1, "expl", 1, _C99 },
851 { rts_exp2l, 1, "exp2l", 1, _C99 },
852 { rts_exp10l, 1, "exp10l", 1, _GNUC },
853 { rts_logl, 1, "logl", 1, _C99 },
854 { rts_log2l, 1, "log2l", 1, _C99 },
855 { rts_log10l, 1, "log10l", 1, _C99 },
856 { rts_powl, 1, "powl", 2, _C99 },
857 { rts_sinl, 1, "sinl", 1, _C99 },
858 { rts_cosl, 1, "cosl", 1, _C99 },
859 { rts_tanl, 1, "tanl", 1, _C99 },
860 { rts_asinl, 1, "asinl", 1, _C99 },
861 { rts_acosl, 1, "acosl", 1, _C99 },
862 { rts_atanl, 1, "atanl", 1, _C99 },
863 { rts_sinhl, 1, "sinhl", 1, _C99 },
864 { rts_coshl, 1, "coshl", 1, _C99 },
865 { rts_tanhl, 1, "tanhl", 1, _C99 },
867 { rts_strcmp, 1, "strcmp", 2, _C89 },
868 { rts_strncmp, 1, "strncmp", 3, _C89 },
869 { rts_strcpy, 1, "strcpy", 2, _C89 },
870 { rts_strlen, 1, "strlen", 1, _C89 },
871 { rts_memcpy, 1, "memcpy", 3, _C89 },
872 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
873 { rts_memmove, 1, "memmove", 3, _C89 },
874 { rts_memset, 1, "memset", 3, _C89 },
875 { rts_memcmp, 1, "memcmp", 3, _C89 },
878 static ident *rts_idents[lengthof(rts_data)];
880 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
882 void set_create_ld_ident(ident *(*func)(entity_t*))
884 create_ld_ident = func;
888 * Handle GNU attributes for entities
890 * @param ent the entity
891 * @param decl the routine declaration
893 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
895 assert(is_declaration(entity));
896 decl_modifiers_t modifiers = entity->declaration.modifiers;
898 if (is_method_entity(irentity)) {
899 if (modifiers & DM_PURE) {
900 set_entity_additional_properties(irentity, mtp_property_pure);
902 if (modifiers & DM_CONST) {
903 add_entity_additional_properties(irentity, mtp_property_const);
904 have_const_functions = true;
907 if (modifiers & DM_USED) {
908 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
910 if (modifiers & DM_WEAK) {
911 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
915 static bool is_main(entity_t *entity)
917 static symbol_t *sym_main = NULL;
918 if (sym_main == NULL) {
919 sym_main = symbol_table_insert("main");
922 if (entity->base.symbol != sym_main)
924 /* must be in outermost scope */
925 if (entity->base.parent_scope != ¤t_translation_unit->scope)
932 * Creates an entity representing a function.
934 * @param entity the function declaration/definition
935 * @param owner_type the owner type of this function, NULL
936 * for global functions
938 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
940 assert(entity->kind == ENTITY_FUNCTION);
941 if (entity->function.irentity != NULL) {
942 return entity->function.irentity;
945 entity_t *original_entity = entity;
946 if (entity->function.btk != bk_none) {
947 entity = get_builtin_replacement(entity);
952 if (is_main(entity)) {
953 /* force main to C linkage */
954 type_t *type = entity->declaration.type;
955 assert(is_type_function(type));
956 if (type->function.linkage != LINKAGE_C) {
957 type_t *new_type = duplicate_type(type);
958 new_type->function.linkage = LINKAGE_C;
959 type = identify_new_type(new_type);
960 entity->declaration.type = type;
964 symbol_t *symbol = entity->base.symbol;
965 ident *id = new_id_from_str(symbol->string);
967 /* already an entity defined? */
968 ir_entity *irentity = entitymap_get(&entitymap, symbol);
969 bool const has_body = entity->function.statement != NULL;
970 if (irentity != NULL) {
971 if (get_entity_visibility(irentity) == ir_visibility_external
973 set_entity_visibility(irentity, ir_visibility_default);
978 ir_type *ir_type_method;
979 if (entity->function.need_closure)
980 ir_type_method = create_method_type(&entity->declaration.type->function, true);
982 ir_type_method = get_ir_type(entity->declaration.type);
984 bool nested_function = false;
985 if (owner_type == NULL)
986 owner_type = get_glob_type();
988 nested_function = true;
990 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
991 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
995 ld_id = id_unique("inner.%u");
997 ld_id = create_ld_ident(entity);
998 set_entity_ld_ident(irentity, ld_id);
1000 handle_decl_modifiers(irentity, entity);
1002 if (! nested_function) {
1003 /* static inline => local
1004 * extern inline => local
1005 * inline without definition => local
1006 * inline with definition => external_visible */
1007 storage_class_tag_t const storage_class
1008 = (storage_class_tag_t) entity->declaration.storage_class;
1009 bool const is_inline = entity->function.is_inline;
1011 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1012 set_entity_visibility(irentity, ir_visibility_default);
1013 } else if (storage_class == STORAGE_CLASS_STATIC ||
1014 (is_inline && has_body)) {
1015 set_entity_visibility(irentity, ir_visibility_local);
1016 } else if (has_body) {
1017 set_entity_visibility(irentity, ir_visibility_default);
1019 set_entity_visibility(irentity, ir_visibility_external);
1022 /* nested functions are always local */
1023 set_entity_visibility(irentity, ir_visibility_local);
1026 /* We should check for file scope here, but as long as we compile C only
1027 this is not needed. */
1028 if (!freestanding && !has_body) {
1029 /* check for a known runtime function */
1030 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1031 if (id != rts_idents[i])
1034 function_type_t *function_type
1035 = &entity->declaration.type->function;
1036 /* rts_entities code can't handle a "wrong" number of parameters */
1037 if (function_type->unspecified_parameters)
1040 /* check number of parameters */
1041 int n_params = count_parameters(function_type);
1042 if (n_params != rts_data[i].n_params)
1045 type_t *return_type = skip_typeref(function_type->return_type);
1046 int n_res = return_type != type_void ? 1 : 0;
1047 if (n_res != rts_data[i].n_res)
1050 /* ignore those rts functions not necessary needed for current mode */
1051 if ((c_mode & rts_data[i].flags) == 0)
1053 assert(rts_entities[rts_data[i].id] == NULL);
1054 rts_entities[rts_data[i].id] = irentity;
1058 entitymap_insert(&entitymap, symbol, irentity);
1061 original_entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1062 original_entity->function.irentity = irentity;
1068 * Creates a SymConst for a given entity.
1070 * @param dbgi debug info
1071 * @param mode the (reference) mode for the SymConst
1072 * @param entity the entity
1074 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1077 assert(entity != NULL);
1078 union symconst_symbol sym;
1079 sym.entity_p = entity;
1080 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1083 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1085 ir_mode *value_mode = get_irn_mode(value);
1087 if (value_mode == dest_mode || is_Bad(value))
1090 if (dest_mode == mode_b) {
1091 ir_node *zero = new_Const(get_mode_null(value_mode));
1092 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1093 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1097 return new_d_Conv(dbgi, value, dest_mode);
1101 * Creates a SymConst node representing a wide string literal.
1103 * @param literal the wide string literal
1105 static ir_node *wide_string_literal_to_firm(
1106 const string_literal_expression_t *literal)
1108 ir_type *const global_type = get_glob_type();
1109 ir_type *const elem_type = ir_type_wchar_t;
1110 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1111 ir_type *const type = new_type_array(1, elem_type);
1113 ident *const id = id_unique("str.%u");
1114 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1115 set_entity_ld_ident(entity, id);
1116 set_entity_visibility(entity, ir_visibility_private);
1117 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1119 ir_mode *const mode = get_type_mode(elem_type);
1120 const size_t slen = wstrlen(&literal->value);
1122 set_array_lower_bound_int(type, 0, 0);
1123 set_array_upper_bound_int(type, 0, slen);
1124 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1125 set_type_state(type, layout_fixed);
1127 ir_initializer_t *initializer = create_initializer_compound(slen);
1128 const char *p = literal->value.begin;
1129 for (size_t i = 0; i < slen; ++i) {
1130 assert(p < literal->value.begin + literal->value.size);
1131 utf32 v = read_utf8_char(&p);
1132 ir_tarval *tv = new_tarval_from_long(v, mode);
1133 ir_initializer_t *val = create_initializer_tarval(tv);
1134 set_initializer_compound_value(initializer, i, val);
1136 set_entity_initializer(entity, initializer);
1138 return create_symconst(dbgi, mode_P_data, entity);
1142 * Creates a SymConst node representing a string constant.
1144 * @param src_pos the source position of the string constant
1145 * @param id_prefix a prefix for the name of the generated string constant
1146 * @param value the value of the string constant
1148 static ir_node *string_to_firm(const source_position_t *const src_pos,
1149 const char *const id_prefix,
1150 const string_t *const value)
1152 ir_type *const global_type = get_glob_type();
1153 dbg_info *const dbgi = get_dbg_info(src_pos);
1154 ir_type *const type = new_type_array(1, ir_type_const_char);
1156 ident *const id = id_unique(id_prefix);
1157 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1158 set_entity_ld_ident(entity, id);
1159 set_entity_visibility(entity, ir_visibility_private);
1160 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1162 ir_type *const elem_type = ir_type_const_char;
1163 ir_mode *const mode = get_type_mode(elem_type);
1165 const char* const string = value->begin;
1166 const size_t slen = value->size;
1168 set_array_lower_bound_int(type, 0, 0);
1169 set_array_upper_bound_int(type, 0, slen);
1170 set_type_size_bytes(type, slen);
1171 set_type_state(type, layout_fixed);
1173 ir_initializer_t *initializer = create_initializer_compound(slen);
1174 for (size_t i = 0; i < slen; ++i) {
1175 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1176 ir_initializer_t *val = create_initializer_tarval(tv);
1177 set_initializer_compound_value(initializer, i, val);
1179 set_entity_initializer(entity, initializer);
1181 return create_symconst(dbgi, mode_P_data, entity);
1184 static bool try_create_integer(literal_expression_t *literal,
1185 type_t *type, unsigned char base)
1187 const char *string = literal->value.begin;
1188 size_t size = literal->value.size;
1190 assert(type->kind == TYPE_ATOMIC);
1191 atomic_type_kind_t akind = type->atomic.akind;
1193 ir_mode *mode = atomic_modes[akind];
1194 ir_tarval *tv = new_integer_tarval_from_str(string, size, 1, base, mode);
1195 if (tv == tarval_bad)
1198 literal->base.type = type;
1199 literal->target_value = tv;
1203 static void create_integer_tarval(literal_expression_t *literal)
1207 symbol_t *suffix = literal->suffix;
1209 if (suffix != NULL) {
1210 for (const char *c = suffix->string; *c != '\0'; ++c) {
1211 if (*c == 'u' || *c == 'U') { ++us; }
1212 if (*c == 'l' || *c == 'L') { ++ls; }
1217 switch (literal->base.kind) {
1218 case EXPR_LITERAL_INTEGER_OCTAL: base = 8; break;
1219 case EXPR_LITERAL_INTEGER: base = 10; break;
1220 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1221 default: panic("invalid literal kind");
1224 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1226 /* now try if the constant is small enough for some types */
1227 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1229 if (us == 0 && try_create_integer(literal, type_int, base))
1231 if ((us == 1 || base != 10)
1232 && try_create_integer(literal, type_unsigned_int, base))
1236 if (us == 0 && try_create_integer(literal, type_long, base))
1238 if ((us == 1 || base != 10)
1239 && try_create_integer(literal, type_unsigned_long, base))
1242 /* last try? then we should not report tarval_bad */
1243 if (us != 1 && base == 10)
1244 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1245 if (us == 0 && try_create_integer(literal, type_long_long, base))
1249 assert(us == 1 || base != 10);
1250 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1251 bool res = try_create_integer(literal, type_unsigned_long_long, base);
1253 panic("internal error when parsing number literal");
1256 tarval_set_integer_overflow_mode(old_mode);
1259 void determine_literal_type(literal_expression_t *literal)
1261 switch (literal->base.kind) {
1262 case EXPR_LITERAL_INTEGER:
1263 case EXPR_LITERAL_INTEGER_OCTAL:
1264 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1265 create_integer_tarval(literal);
1273 * Creates a Const node representing a constant.
1275 static ir_node *literal_to_firm(const literal_expression_t *literal)
1277 type_t *type = skip_typeref(literal->base.type);
1278 ir_mode *mode = get_ir_mode_storage(type);
1279 const char *string = literal->value.begin;
1280 size_t size = literal->value.size;
1283 switch (literal->base.kind) {
1284 case EXPR_LITERAL_WIDE_CHARACTER: {
1285 utf32 v = read_utf8_char(&string);
1287 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1289 tv = new_tarval_from_str(buf, len, mode);
1292 case EXPR_LITERAL_CHARACTER: {
1294 if (size == 1 && char_is_signed) {
1295 v = (signed char)string[0];
1298 for (size_t i = 0; i < size; ++i) {
1299 v = (v << 8) | ((unsigned char)string[i]);
1303 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1305 tv = new_tarval_from_str(buf, len, mode);
1308 case EXPR_LITERAL_INTEGER:
1309 case EXPR_LITERAL_INTEGER_OCTAL:
1310 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1311 assert(literal->target_value != NULL);
1312 tv = literal->target_value;
1314 case EXPR_LITERAL_FLOATINGPOINT:
1315 tv = new_tarval_from_str(string, size, mode);
1317 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1318 char buffer[size + 2];
1319 memcpy(buffer, "0x", 2);
1320 memcpy(buffer+2, string, size);
1321 tv = new_tarval_from_str(buffer, size+2, mode);
1324 case EXPR_LITERAL_BOOLEAN:
1325 if (string[0] == 't') {
1326 tv = get_mode_one(mode);
1328 assert(string[0] == 'f');
1329 tv = get_mode_null(mode);
1332 case EXPR_LITERAL_MS_NOOP:
1333 tv = get_mode_null(mode);
1338 panic("Invalid literal kind found");
1341 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1342 ir_node *res = new_d_Const(dbgi, tv);
1343 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1344 return create_conv(dbgi, res, mode_arith);
1348 * Allocate an area of size bytes aligned at alignment
1351 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1353 static unsigned area_cnt = 0;
1356 ir_type *tp = new_type_array(1, ir_type_char);
1357 set_array_bounds_int(tp, 0, 0, size);
1358 set_type_alignment_bytes(tp, alignment);
1360 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1361 ident *name = new_id_from_str(buf);
1362 ir_entity *area = new_entity(frame_type, name, tp);
1364 /* mark this entity as compiler generated */
1365 set_entity_compiler_generated(area, 1);
1370 * Return a node representing a trampoline region
1371 * for a given function entity.
1373 * @param dbgi debug info
1374 * @param entity the function entity
1376 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1378 ir_entity *region = NULL;
1381 if (current_trampolines != NULL) {
1382 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1383 if (current_trampolines[i].function == entity) {
1384 region = current_trampolines[i].region;
1389 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1391 ir_graph *irg = current_ir_graph;
1392 if (region == NULL) {
1393 /* create a new region */
1394 ir_type *frame_tp = get_irg_frame_type(irg);
1395 trampoline_region reg;
1396 reg.function = entity;
1398 reg.region = alloc_trampoline(frame_tp,
1399 be_params->trampoline_size,
1400 be_params->trampoline_align);
1401 ARR_APP1(trampoline_region, current_trampolines, reg);
1402 region = reg.region;
1404 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1409 * Creates a trampoline for a function represented by an entity.
1411 * @param dbgi debug info
1412 * @param mode the (reference) mode for the function address
1413 * @param entity the function entity
1415 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1418 assert(entity != NULL);
1420 in[0] = get_trampoline_region(dbgi, entity);
1421 in[1] = create_symconst(dbgi, mode, entity);
1422 in[2] = get_irg_frame(current_ir_graph);
1424 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1425 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1426 return new_Proj(irn, mode, pn_Builtin_1_result);
1430 * Dereference an address.
1432 * @param dbgi debug info
1433 * @param type the type of the dereferenced result (the points_to type)
1434 * @param addr the address to dereference
1436 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1437 ir_node *const addr)
1439 ir_type *irtype = get_ir_type(type);
1440 if (is_compound_type(irtype)
1441 || is_Method_type(irtype)
1442 || is_Array_type(irtype)) {
1446 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1447 ? cons_volatile : cons_none;
1448 ir_mode *const mode = get_type_mode(irtype);
1449 ir_node *const memory = get_store();
1450 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1451 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1452 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1454 set_store(load_mem);
1456 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1457 return create_conv(dbgi, load_res, mode_arithmetic);
1461 * Creates a strict Conv (to the node's mode) if necessary.
1463 * @param dbgi debug info
1464 * @param node the node to strict conv
1466 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1468 ir_mode *mode = get_irn_mode(node);
1470 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1472 if (!mode_is_float(mode))
1475 /* check if there is already a Conv */
1476 if (is_Conv(node)) {
1477 /* convert it into a strict Conv */
1478 set_Conv_strict(node, 1);
1482 /* otherwise create a new one */
1483 return new_d_strictConv(dbgi, node, mode);
1487 * Returns the address of a global variable.
1489 * @param dbgi debug info
1490 * @param variable the variable
1492 static ir_node *get_global_var_address(dbg_info *const dbgi,
1493 const variable_t *const variable)
1495 ir_entity *const irentity = variable->v.entity;
1496 if (variable->thread_local) {
1497 ir_node *const no_mem = new_NoMem();
1498 ir_node *const tls = get_irg_tls(current_ir_graph);
1499 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1501 return create_symconst(dbgi, mode_P_data, irentity);
1506 * Returns the correct base address depending on whether it is a parameter or a
1507 * normal local variable.
1509 static ir_node *get_local_frame(ir_entity *const ent)
1511 ir_graph *const irg = current_ir_graph;
1512 const ir_type *const owner = get_entity_owner(ent);
1513 if (owner == current_outer_frame || owner == current_outer_value_type) {
1514 assert(current_static_link != NULL);
1515 return current_static_link;
1517 return get_irg_frame(irg);
1522 * Keep all memory edges of the given block.
1524 static void keep_all_memory(ir_node *block)
1526 ir_node *old = get_cur_block();
1528 set_cur_block(block);
1529 keep_alive(get_store());
1530 /* TODO: keep all memory edges from restricted pointers */
1534 static ir_node *reference_expression_enum_value_to_firm(
1535 const reference_expression_t *ref)
1537 entity_t *entity = ref->entity;
1538 type_t *type = skip_typeref(entity->enum_value.enum_type);
1539 /* make sure the type is constructed */
1540 (void) get_ir_type(type);
1542 return new_Const(entity->enum_value.tv);
1545 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1547 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1548 entity_t *entity = ref->entity;
1549 assert(is_declaration(entity));
1550 type_t *type = skip_typeref(entity->declaration.type);
1552 /* make sure the type is constructed */
1553 (void) get_ir_type(type);
1555 if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1556 ir_entity *irentity = get_function_entity(entity, NULL);
1557 /* for gcc compatibility we have to produce (dummy) addresses for some
1558 * builtins which don't have entities */
1559 if (irentity == NULL) {
1560 if (warning.other) {
1561 warningf(&ref->base.source_position,
1562 "taking address of builtin '%Y'",
1563 ref->entity->base.symbol);
1566 /* simply create a NULL pointer */
1567 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1568 ir_node *res = new_Const_long(mode, 0);
1574 switch ((declaration_kind_t) entity->declaration.kind) {
1575 case DECLARATION_KIND_UNKNOWN:
1578 case DECLARATION_KIND_LOCAL_VARIABLE: {
1579 ir_mode *const mode = get_ir_mode_storage(type);
1580 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1581 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1583 case DECLARATION_KIND_PARAMETER: {
1584 ir_mode *const mode = get_ir_mode_storage(type);
1585 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1586 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1588 case DECLARATION_KIND_FUNCTION: {
1589 ir_mode *const mode = get_ir_mode_storage(type);
1590 return create_symconst(dbgi, mode, entity->function.irentity);
1592 case DECLARATION_KIND_INNER_FUNCTION: {
1593 ir_mode *const mode = get_ir_mode_storage(type);
1594 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1595 /* inner function not using the closure */
1596 return create_symconst(dbgi, mode, entity->function.irentity);
1598 /* need trampoline here */
1599 return create_trampoline(dbgi, mode, entity->function.irentity);
1602 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1603 const variable_t *variable = &entity->variable;
1604 ir_node *const addr = get_global_var_address(dbgi, variable);
1605 return deref_address(dbgi, variable->base.type, addr);
1608 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1609 ir_entity *irentity = entity->variable.v.entity;
1610 ir_node *frame = get_local_frame(irentity);
1611 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1612 return deref_address(dbgi, entity->declaration.type, sel);
1614 case DECLARATION_KIND_PARAMETER_ENTITY: {
1615 ir_entity *irentity = entity->parameter.v.entity;
1616 ir_node *frame = get_local_frame(irentity);
1617 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1618 return deref_address(dbgi, entity->declaration.type, sel);
1621 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1622 return entity->variable.v.vla_base;
1624 case DECLARATION_KIND_COMPOUND_MEMBER:
1625 panic("not implemented reference type");
1628 panic("reference to declaration with unknown type found");
1631 static ir_node *reference_addr(const reference_expression_t *ref)
1633 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1634 entity_t *entity = ref->entity;
1635 assert(is_declaration(entity));
1637 switch((declaration_kind_t) entity->declaration.kind) {
1638 case DECLARATION_KIND_UNKNOWN:
1640 case DECLARATION_KIND_PARAMETER:
1641 case DECLARATION_KIND_LOCAL_VARIABLE:
1642 /* you can store to a local variable (so we don't panic but return NULL
1643 * as an indicator for no real address) */
1645 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1646 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1649 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1650 ir_entity *irentity = entity->variable.v.entity;
1651 ir_node *frame = get_local_frame(irentity);
1652 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1656 case DECLARATION_KIND_PARAMETER_ENTITY: {
1657 ir_entity *irentity = entity->parameter.v.entity;
1658 ir_node *frame = get_local_frame(irentity);
1659 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1664 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1665 return entity->variable.v.vla_base;
1667 case DECLARATION_KIND_FUNCTION: {
1668 type_t *const type = skip_typeref(entity->declaration.type);
1669 ir_mode *const mode = get_ir_mode_storage(type);
1670 return create_symconst(dbgi, mode, entity->function.irentity);
1673 case DECLARATION_KIND_INNER_FUNCTION: {
1674 type_t *const type = skip_typeref(entity->declaration.type);
1675 ir_mode *const mode = get_ir_mode_storage(type);
1676 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1677 /* inner function not using the closure */
1678 return create_symconst(dbgi, mode, entity->function.irentity);
1680 /* need trampoline here */
1681 return create_trampoline(dbgi, mode, entity->function.irentity);
1685 case DECLARATION_KIND_COMPOUND_MEMBER:
1686 panic("not implemented reference type");
1689 panic("reference to declaration with unknown type found");
1693 * Generate an unary builtin.
1695 * @param kind the builtin kind to generate
1696 * @param op the operand
1697 * @param function_type the function type for the GNU builtin routine
1698 * @param db debug info
1700 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1703 in[0] = expression_to_firm(op);
1705 ir_type *tp = get_ir_type(function_type);
1706 ir_type *res = get_method_res_type(tp, 0);
1707 ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1708 set_irn_pinned(irn, op_pin_state_floats);
1709 return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1713 * Generate a pinned unary builtin.
1715 * @param kind the builtin kind to generate
1716 * @param op the operand
1717 * @param function_type the function type for the GNU builtin routine
1718 * @param db debug info
1720 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op,
1721 type_t *function_type, dbg_info *db)
1724 in[0] = expression_to_firm(op);
1726 ir_type *tp = get_ir_type(function_type);
1727 ir_type *res = get_method_res_type(tp, 0);
1728 ir_node *mem = get_store();
1729 ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1730 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1731 return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1735 * Generate an binary-void-return builtin.
1737 * @param kind the builtin kind to generate
1738 * @param op1 the first operand
1739 * @param op2 the second operand
1740 * @param function_type the function type for the GNU builtin routine
1741 * @param db debug info
1743 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1,
1744 expression_t *op2, type_t *function_type,
1748 in[0] = expression_to_firm(op1);
1749 in[1] = expression_to_firm(op2);
1751 ir_type *tp = get_ir_type(function_type);
1752 ir_node *mem = get_store();
1753 ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1754 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1759 * Transform calls to builtin functions.
1761 static ir_node *process_builtin_call(const call_expression_t *call)
1763 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1765 assert(call->function->kind == EXPR_REFERENCE);
1766 reference_expression_t *builtin = &call->function->reference;
1768 type_t *type = skip_typeref(builtin->base.type);
1769 assert(is_type_pointer(type));
1771 type_t *function_type = skip_typeref(type->pointer.points_to);
1773 switch (builtin->entity->function.btk) {
1774 case bk_gnu_builtin_alloca: {
1775 if (call->arguments == NULL || call->arguments->next != NULL) {
1776 panic("invalid number of parameters on __builtin_alloca");
1778 expression_t *argument = call->arguments->expression;
1779 ir_node *size = expression_to_firm(argument);
1781 ir_node *store = get_store();
1782 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1784 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1786 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1791 case bk_gnu_builtin_huge_val:
1792 case bk_gnu_builtin_huge_valf:
1793 case bk_gnu_builtin_huge_vall:
1794 case bk_gnu_builtin_inf:
1795 case bk_gnu_builtin_inff:
1796 case bk_gnu_builtin_infl: {
1797 type_t *type = function_type->function.return_type;
1798 ir_mode *mode = get_ir_mode_arithmetic(type);
1799 ir_tarval *tv = get_mode_infinite(mode);
1800 ir_node *res = new_d_Const(dbgi, tv);
1803 case bk_gnu_builtin_nan:
1804 case bk_gnu_builtin_nanf:
1805 case bk_gnu_builtin_nanl: {
1806 /* Ignore string for now... */
1807 assert(is_type_function(function_type));
1808 type_t *type = function_type->function.return_type;
1809 ir_mode *mode = get_ir_mode_arithmetic(type);
1810 ir_tarval *tv = get_mode_NAN(mode);
1811 ir_node *res = new_d_Const(dbgi, tv);
1814 case bk_gnu_builtin_expect: {
1815 expression_t *argument = call->arguments->expression;
1816 return _expression_to_firm(argument);
1818 case bk_gnu_builtin_va_end:
1819 /* evaluate the argument of va_end for its side effects */
1820 _expression_to_firm(call->arguments->expression);
1822 case bk_gnu_builtin_frame_address: {
1823 expression_t *const expression = call->arguments->expression;
1824 bool val = fold_constant_to_bool(expression);
1827 return get_irg_frame(current_ir_graph);
1829 /* get the argument */
1832 in[0] = expression_to_firm(expression);
1833 in[1] = get_irg_frame(current_ir_graph);
1834 ir_type *tp = get_ir_type(function_type);
1835 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1836 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1839 case bk_gnu_builtin_return_address: {
1840 expression_t *const expression = call->arguments->expression;
1843 in[0] = expression_to_firm(expression);
1844 in[1] = get_irg_frame(current_ir_graph);
1845 ir_type *tp = get_ir_type(function_type);
1846 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1847 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1849 case bk_gnu_builtin_ffs:
1850 return gen_unary_builtin(ir_bk_ffs, call->arguments->expression, function_type, dbgi);
1851 case bk_gnu_builtin_clz:
1852 return gen_unary_builtin(ir_bk_clz, call->arguments->expression, function_type, dbgi);
1853 case bk_gnu_builtin_ctz:
1854 return gen_unary_builtin(ir_bk_ctz, call->arguments->expression, function_type, dbgi);
1855 case bk_gnu_builtin_popcount:
1856 case bk_ms__popcount:
1857 return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1858 case bk_gnu_builtin_parity:
1859 return gen_unary_builtin(ir_bk_parity, call->arguments->expression, function_type, dbgi);
1860 case bk_gnu_builtin_prefetch: {
1861 call_argument_t *const args = call->arguments;
1862 expression_t *const addr = args->expression;
1865 in[0] = _expression_to_firm(addr);
1866 if (args->next != NULL) {
1867 expression_t *const rw = args->next->expression;
1869 in[1] = _expression_to_firm(rw);
1871 if (args->next->next != NULL) {
1872 expression_t *const locality = args->next->next->expression;
1874 in[2] = expression_to_firm(locality);
1876 in[2] = new_Const_long(mode_int, 3);
1879 in[1] = new_Const_long(mode_int, 0);
1880 in[2] = new_Const_long(mode_int, 3);
1882 ir_type *tp = get_ir_type(function_type);
1883 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1884 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1887 case bk_gnu_builtin_object_size: {
1888 /* determine value of "type" */
1889 expression_t *type_expression = call->arguments->next->expression;
1890 long type_val = fold_constant_to_int(type_expression);
1891 type_t *type = function_type->function.return_type;
1892 ir_mode *mode = get_ir_mode_arithmetic(type);
1895 /* just produce a "I don't know" result */
1897 result = new_tarval_from_long(0, mode);
1899 result = new_tarval_from_long(-1, mode);
1901 return new_d_Const(dbgi, result);
1903 case bk_gnu_builtin_trap:
1906 ir_type *tp = get_ir_type(function_type);
1907 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1908 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1911 case bk_ms__debugbreak: {
1912 ir_type *tp = get_ir_type(function_type);
1913 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1914 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1917 case bk_ms_ReturnAddress: {
1920 in[0] = new_Const_long(mode_int, 0);
1921 in[1] = get_irg_frame(current_ir_graph);
1922 ir_type *tp = get_ir_type(function_type);
1923 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1924 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1927 case bk_ms_rotl64: {
1928 ir_node *val = expression_to_firm(call->arguments->expression);
1929 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1930 ir_mode *mode = get_irn_mode(val);
1931 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1934 case bk_ms_rotr64: {
1935 ir_node *val = expression_to_firm(call->arguments->expression);
1936 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1937 ir_mode *mode = get_irn_mode(val);
1938 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1939 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1940 return new_d_Rotl(dbgi, val, sub, mode);
1942 case bk_ms_byteswap_ushort:
1943 case bk_ms_byteswap_ulong:
1944 case bk_ms_byteswap_uint64:
1945 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1948 case bk_ms__indword:
1949 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1950 case bk_ms__outbyte:
1951 case bk_ms__outword:
1952 case bk_ms__outdword:
1953 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1954 call->arguments->next->expression, function_type, dbgi);
1956 panic("unsupported builtin found");
1961 * Transform a call expression.
1962 * Handles some special cases, like alloca() calls, which must be resolved
1963 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1964 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1967 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1969 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1970 assert(get_cur_block() != NULL);
1972 expression_t *function = call->function;
1973 if (function->kind == EXPR_REFERENCE) {
1974 const reference_expression_t *ref = &function->reference;
1975 entity_t *entity = ref->entity;
1977 if (entity->kind == ENTITY_FUNCTION) {
1978 ir_entity *irentity = entity->function.irentity;
1979 if (irentity == NULL)
1980 irentity = get_function_entity(entity, NULL);
1982 if (irentity == NULL && entity->function.btk != bk_none) {
1983 return process_builtin_call(call);
1987 if (irentity == rts_entities[rts_alloca]) {
1988 /* handle alloca() call */
1989 expression_t *argument = call->arguments->expression;
1990 ir_node *size = expression_to_firm(argument);
1991 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1993 size = create_conv(dbgi, size, mode);
1995 ir_node *store = get_store();
1996 ir_node *alloca = new_d_Alloc(dbgi, store, size,
1997 firm_unknown_type, stack_alloc);
1998 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
2000 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
2007 ir_node *callee = expression_to_firm(function);
2009 type_t *type = skip_typeref(function->base.type);
2010 assert(is_type_pointer(type));
2011 pointer_type_t *pointer_type = &type->pointer;
2012 type_t *points_to = skip_typeref(pointer_type->points_to);
2013 assert(is_type_function(points_to));
2014 function_type_t *function_type = &points_to->function;
2016 int n_parameters = 0;
2017 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
2018 ir_type *new_method_type = NULL;
2019 if (function_type->variadic || function_type->unspecified_parameters) {
2020 const call_argument_t *argument = call->arguments;
2021 for ( ; argument != NULL; argument = argument->next) {
2025 /* we need to construct a new method type matching the call
2027 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
2028 int n_res = get_method_n_ress(ir_method_type);
2029 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
2030 set_method_calling_convention(new_method_type,
2031 get_method_calling_convention(ir_method_type));
2032 set_method_additional_properties(new_method_type,
2033 get_method_additional_properties(ir_method_type));
2034 set_method_variadicity(new_method_type,
2035 get_method_variadicity(ir_method_type));
2037 for (int i = 0; i < n_res; ++i) {
2038 set_method_res_type(new_method_type, i,
2039 get_method_res_type(ir_method_type, i));
2041 argument = call->arguments;
2042 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
2043 expression_t *expression = argument->expression;
2044 ir_type *irtype = get_ir_type(expression->base.type);
2045 set_method_param_type(new_method_type, i, irtype);
2047 ir_method_type = new_method_type;
2049 n_parameters = get_method_n_params(ir_method_type);
2052 ir_node *in[n_parameters];
2054 const call_argument_t *argument = call->arguments;
2055 for (int n = 0; n < n_parameters; ++n) {
2056 expression_t *expression = argument->expression;
2057 ir_node *arg_node = expression_to_firm(expression);
2059 type_t *type = skip_typeref(expression->base.type);
2060 if (!is_type_compound(type)) {
2061 ir_mode *mode = get_ir_mode_storage(expression->base.type);
2062 arg_node = create_conv(dbgi, arg_node, mode);
2063 arg_node = do_strict_conv(dbgi, arg_node);
2068 argument = argument->next;
2071 ir_node *store = get_store();
2072 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
2074 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M);
2077 type_t *return_type = skip_typeref(function_type->return_type);
2078 ir_node *result = NULL;
2080 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2081 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
2083 if (is_type_scalar(return_type)) {
2084 ir_mode *mode = get_ir_mode_storage(return_type);
2085 result = new_d_Proj(dbgi, resproj, mode, 0);
2086 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
2087 result = create_conv(NULL, result, mode_arith);
2089 ir_mode *mode = mode_P_data;
2090 result = new_d_Proj(dbgi, resproj, mode, 0);
2094 if (function->kind == EXPR_REFERENCE &&
2095 function->reference.entity->declaration.modifiers & DM_NORETURN) {
2096 /* A dead end: Keep the Call and the Block. Also place all further
2097 * nodes into a new and unreachable block. */
2099 keep_alive(get_cur_block());
2100 ir_node *block = new_Block(0, NULL);
2101 set_cur_block(block);
2107 static void statement_to_firm(statement_t *statement);
2108 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
2110 static ir_node *expression_to_addr(const expression_t *expression);
2111 static ir_node *create_condition_evaluation(const expression_t *expression,
2112 ir_node *true_block,
2113 ir_node *false_block);
2115 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
2118 if (!is_type_compound(type)) {
2119 ir_mode *mode = get_ir_mode_storage(type);
2120 value = create_conv(dbgi, value, mode);
2121 value = do_strict_conv(dbgi, value);
2124 ir_node *memory = get_store();
2126 if (is_type_scalar(type)) {
2127 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2128 ? cons_volatile : cons_none;
2129 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
2130 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2131 set_store(store_mem);
2133 ir_type *irtype = get_ir_type(type);
2134 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
2135 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
2136 set_store(copyb_mem);
2140 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2142 ir_tarval *all_one = get_mode_all_one(mode);
2143 int mode_size = get_mode_size_bits(mode);
2145 assert(offset >= 0);
2147 assert(offset + size <= mode_size);
2148 if (size == mode_size) {
2152 long shiftr = get_mode_size_bits(mode) - size;
2153 long shiftl = offset;
2154 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2155 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2156 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
2157 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
2162 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2163 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2165 ir_type *entity_type = get_entity_type(entity);
2166 ir_type *base_type = get_primitive_base_type(entity_type);
2167 assert(base_type != NULL);
2168 ir_mode *mode = get_type_mode(base_type);
2170 value = create_conv(dbgi, value, mode);
2172 /* kill upper bits of value and shift to right position */
2173 int bitoffset = get_entity_offset_bits_remainder(entity);
2174 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
2176 ir_tarval *mask = create_bitfield_mask(mode, 0, bitsize);
2177 ir_node *mask_node = new_d_Const(dbgi, mask);
2178 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
2179 ir_tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
2180 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
2181 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2183 /* load current value */
2184 ir_node *mem = get_store();
2185 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2186 set_volatile ? cons_volatile : cons_none);
2187 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2188 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2189 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2190 ir_tarval *inv_mask = tarval_not(shift_mask);
2191 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2192 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2194 /* construct new value and store */
2195 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2196 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2197 set_volatile ? cons_volatile : cons_none);
2198 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2199 set_store(store_mem);
2201 return value_masked;
2204 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2207 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2208 type_t *type = expression->base.type;
2209 ir_mode *mode = get_ir_mode_storage(type);
2210 ir_node *mem = get_store();
2211 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2212 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2213 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2215 load_res = create_conv(dbgi, load_res, mode_int);
2217 set_store(load_mem);
2219 /* kill upper bits */
2220 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2221 ir_entity *entity = expression->compound_entry->compound_member.entity;
2222 int bitoffset = get_entity_offset_bits_remainder(entity);
2223 ir_type *entity_type = get_entity_type(entity);
2224 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
2225 long shift_bitsl = machine_size - bitoffset - bitsize;
2226 assert(shift_bitsl >= 0);
2227 ir_tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
2228 ir_node *countl = new_d_Const(dbgi, tvl);
2229 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
2231 long shift_bitsr = bitoffset + shift_bitsl;
2232 assert(shift_bitsr <= (long) machine_size);
2233 ir_tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
2234 ir_node *countr = new_d_Const(dbgi, tvr);
2236 if (mode_is_signed(mode)) {
2237 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2239 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2242 return create_conv(dbgi, shiftr, mode);
2245 /* make sure the selected compound type is constructed */
2246 static void construct_select_compound(const select_expression_t *expression)
2248 type_t *type = skip_typeref(expression->compound->base.type);
2249 if (is_type_pointer(type)) {
2250 type = type->pointer.points_to;
2252 (void) get_ir_type(type);
2255 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2256 ir_node *value, ir_node *addr)
2258 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2259 type_t *type = skip_typeref(expression->base.type);
2261 if (!is_type_compound(type)) {
2262 ir_mode *mode = get_ir_mode_storage(type);
2263 value = create_conv(dbgi, value, mode);
2264 value = do_strict_conv(dbgi, value);
2267 if (expression->kind == EXPR_REFERENCE) {
2268 const reference_expression_t *ref = &expression->reference;
2270 entity_t *entity = ref->entity;
2271 assert(is_declaration(entity));
2272 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2273 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2274 set_value(entity->variable.v.value_number, value);
2276 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2277 set_value(entity->parameter.v.value_number, value);
2283 addr = expression_to_addr(expression);
2284 assert(addr != NULL);
2286 if (expression->kind == EXPR_SELECT) {
2287 const select_expression_t *select = &expression->select;
2289 construct_select_compound(select);
2291 entity_t *entity = select->compound_entry;
2292 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2293 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2294 ir_entity *irentity = entity->compound_member.entity;
2296 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2297 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2303 assign_value(dbgi, addr, type, value);
2307 static void set_value_for_expression(const expression_t *expression,
2310 set_value_for_expression_addr(expression, value, NULL);
2313 static ir_node *get_value_from_lvalue(const expression_t *expression,
2316 if (expression->kind == EXPR_REFERENCE) {
2317 const reference_expression_t *ref = &expression->reference;
2319 entity_t *entity = ref->entity;
2320 assert(entity->kind == ENTITY_VARIABLE
2321 || entity->kind == ENTITY_PARAMETER);
2322 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2324 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2325 value_number = entity->variable.v.value_number;
2326 assert(addr == NULL);
2327 type_t *type = skip_typeref(expression->base.type);
2328 ir_mode *mode = get_ir_mode_storage(type);
2329 ir_node *res = get_value(value_number, mode);
2330 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2331 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2332 value_number = entity->parameter.v.value_number;
2333 assert(addr == NULL);
2334 type_t *type = skip_typeref(expression->base.type);
2335 ir_mode *mode = get_ir_mode_storage(type);
2336 ir_node *res = get_value(value_number, mode);
2337 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2341 assert(addr != NULL);
2342 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2345 if (expression->kind == EXPR_SELECT &&
2346 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2347 construct_select_compound(&expression->select);
2348 value = bitfield_extract_to_firm(&expression->select, addr);
2350 value = deref_address(dbgi, expression->base.type, addr);
2357 static ir_node *create_incdec(const unary_expression_t *expression)
2359 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2360 const expression_t *value_expr = expression->value;
2361 ir_node *addr = expression_to_addr(value_expr);
2362 ir_node *value = get_value_from_lvalue(value_expr, addr);
2364 type_t *type = skip_typeref(expression->base.type);
2365 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2368 if (is_type_pointer(type)) {
2369 pointer_type_t *pointer_type = &type->pointer;
2370 offset = get_type_size_node(pointer_type->points_to);
2372 assert(is_type_arithmetic(type));
2373 offset = new_Const(get_mode_one(mode));
2377 ir_node *store_value;
2378 switch(expression->base.kind) {
2379 case EXPR_UNARY_POSTFIX_INCREMENT:
2381 store_value = new_d_Add(dbgi, value, offset, mode);
2383 case EXPR_UNARY_POSTFIX_DECREMENT:
2385 store_value = new_d_Sub(dbgi, value, offset, mode);
2387 case EXPR_UNARY_PREFIX_INCREMENT:
2388 result = new_d_Add(dbgi, value, offset, mode);
2389 store_value = result;
2391 case EXPR_UNARY_PREFIX_DECREMENT:
2392 result = new_d_Sub(dbgi, value, offset, mode);
2393 store_value = result;
2396 panic("no incdec expr in create_incdec");
2399 set_value_for_expression_addr(value_expr, store_value, addr);
2404 static bool is_local_variable(expression_t *expression)
2406 if (expression->kind != EXPR_REFERENCE)
2408 reference_expression_t *ref_expr = &expression->reference;
2409 entity_t *entity = ref_expr->entity;
2410 if (entity->kind != ENTITY_VARIABLE)
2412 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2413 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2416 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2419 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2420 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2421 case EXPR_BINARY_NOTEQUAL:
2422 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2423 case EXPR_BINARY_ISLESS:
2424 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2425 case EXPR_BINARY_ISLESSEQUAL:
2426 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2427 case EXPR_BINARY_ISGREATER:
2428 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2429 case EXPR_BINARY_ISGREATEREQUAL:
2430 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2431 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2436 panic("trying to get pn_Cmp from non-comparison binexpr type");
2440 * Handle the assume optimizer hint: check if a Confirm
2441 * node can be created.
2443 * @param dbi debug info
2444 * @param expr the IL assume expression
2446 * we support here only some simple cases:
2451 static ir_node *handle_assume_compare(dbg_info *dbi,
2452 const binary_expression_t *expression)
2454 expression_t *op1 = expression->left;
2455 expression_t *op2 = expression->right;
2456 entity_t *var2, *var = NULL;
2457 ir_node *res = NULL;
2460 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2462 if (is_local_variable(op1) && is_local_variable(op2)) {
2463 var = op1->reference.entity;
2464 var2 = op2->reference.entity;
2466 type_t *const type = skip_typeref(var->declaration.type);
2467 ir_mode *const mode = get_ir_mode_storage(type);
2469 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2470 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2472 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2473 set_value(var2->variable.v.value_number, res);
2475 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2476 set_value(var->variable.v.value_number, res);
2482 if (is_local_variable(op1) && is_constant_expression(op2)) {
2483 var = op1->reference.entity;
2485 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2486 cmp_val = get_inversed_pnc(cmp_val);
2487 var = op2->reference.entity;
2492 type_t *const type = skip_typeref(var->declaration.type);
2493 ir_mode *const mode = get_ir_mode_storage(type);
2495 res = get_value(var->variable.v.value_number, mode);
2496 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2497 set_value(var->variable.v.value_number, res);
2503 * Handle the assume optimizer hint.
2505 * @param dbi debug info
2506 * @param expr the IL assume expression
2508 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2510 switch(expression->kind) {
2511 case EXPR_BINARY_EQUAL:
2512 case EXPR_BINARY_NOTEQUAL:
2513 case EXPR_BINARY_LESS:
2514 case EXPR_BINARY_LESSEQUAL:
2515 case EXPR_BINARY_GREATER:
2516 case EXPR_BINARY_GREATEREQUAL:
2517 return handle_assume_compare(dbi, &expression->binary);
2523 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2524 type_t *from_type, type_t *type)
2526 type = skip_typeref(type);
2527 if (type == type_void) {
2528 /* make sure firm type is constructed */
2529 (void) get_ir_type(type);
2532 if (!is_type_scalar(type)) {
2533 /* make sure firm type is constructed */
2534 (void) get_ir_type(type);
2538 from_type = skip_typeref(from_type);
2539 ir_mode *mode = get_ir_mode_storage(type);
2540 /* check for conversion from / to __based types */
2541 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2542 const variable_t *from_var = from_type->pointer.base_variable;
2543 const variable_t *to_var = type->pointer.base_variable;
2544 if (from_var != to_var) {
2545 if (from_var != NULL) {
2546 ir_node *const addr = get_global_var_address(dbgi, from_var);
2547 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2548 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2550 if (to_var != NULL) {
2551 ir_node *const addr = get_global_var_address(dbgi, to_var);
2552 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2553 value_node = new_d_Sub(dbgi, value_node, base, mode);
2558 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2559 /* bool adjustments (we save a mode_Bu, but have to temporarily
2560 * convert to mode_b so we only get a 0/1 value */
2561 value_node = create_conv(dbgi, value_node, mode_b);
2564 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2565 ir_node *node = create_conv(dbgi, value_node, mode);
2566 node = do_strict_conv(dbgi, node);
2567 node = create_conv(dbgi, node, mode_arith);
2572 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2574 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2575 type_t *type = skip_typeref(expression->base.type);
2577 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2578 return expression_to_addr(expression->value);
2580 const expression_t *value = expression->value;
2582 switch(expression->base.kind) {
2583 case EXPR_UNARY_NEGATE: {
2584 ir_node *value_node = expression_to_firm(value);
2585 ir_mode *mode = get_ir_mode_arithmetic(type);
2586 return new_d_Minus(dbgi, value_node, mode);
2588 case EXPR_UNARY_PLUS:
2589 return expression_to_firm(value);
2590 case EXPR_UNARY_BITWISE_NEGATE: {
2591 ir_node *value_node = expression_to_firm(value);
2592 ir_mode *mode = get_ir_mode_arithmetic(type);
2593 return new_d_Not(dbgi, value_node, mode);
2595 case EXPR_UNARY_NOT: {
2596 ir_node *value_node = _expression_to_firm(value);
2597 value_node = create_conv(dbgi, value_node, mode_b);
2598 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2601 case EXPR_UNARY_DEREFERENCE: {
2602 ir_node *value_node = expression_to_firm(value);
2603 type_t *value_type = skip_typeref(value->base.type);
2604 assert(is_type_pointer(value_type));
2606 /* check for __based */
2607 const variable_t *const base_var = value_type->pointer.base_variable;
2608 if (base_var != NULL) {
2609 ir_node *const addr = get_global_var_address(dbgi, base_var);
2610 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2611 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2613 type_t *points_to = value_type->pointer.points_to;
2614 return deref_address(dbgi, points_to, value_node);
2616 case EXPR_UNARY_POSTFIX_INCREMENT:
2617 case EXPR_UNARY_POSTFIX_DECREMENT:
2618 case EXPR_UNARY_PREFIX_INCREMENT:
2619 case EXPR_UNARY_PREFIX_DECREMENT:
2620 return create_incdec(expression);
2621 case EXPR_UNARY_CAST_IMPLICIT:
2622 case EXPR_UNARY_CAST: {
2623 ir_node *value_node = expression_to_firm(value);
2624 type_t *from_type = value->base.type;
2625 return create_cast(dbgi, value_node, from_type, type);
2627 case EXPR_UNARY_ASSUME:
2628 return handle_assume(dbgi, value);
2633 panic("invalid UNEXPR type found");
2637 * produces a 0/1 depending of the value of a mode_b node
2639 static ir_node *produce_condition_result(const expression_t *expression,
2640 ir_mode *mode, dbg_info *dbgi)
2642 ir_node *const one_block = new_immBlock();
2643 ir_node *const zero_block = new_immBlock();
2644 create_condition_evaluation(expression, one_block, zero_block);
2645 mature_immBlock(one_block);
2646 mature_immBlock(zero_block);
2648 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2649 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2650 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2651 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2652 set_cur_block(block);
2654 ir_node *const one = new_Const(get_mode_one(mode));
2655 ir_node *const zero = new_Const(get_mode_null(mode));
2656 ir_node *const in[2] = { one, zero };
2657 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2662 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2663 ir_node *value, type_t *type)
2665 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2666 assert(is_type_pointer(type));
2667 pointer_type_t *const pointer_type = &type->pointer;
2668 type_t *const points_to = skip_typeref(pointer_type->points_to);
2669 ir_node * elem_size = get_type_size_node(points_to);
2670 elem_size = create_conv(dbgi, elem_size, mode);
2671 value = create_conv(dbgi, value, mode);
2672 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2676 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2677 ir_node *left, ir_node *right)
2680 type_t *type_left = skip_typeref(expression->left->base.type);
2681 type_t *type_right = skip_typeref(expression->right->base.type);
2683 expression_kind_t kind = expression->base.kind;
2686 case EXPR_BINARY_SHIFTLEFT:
2687 case EXPR_BINARY_SHIFTRIGHT:
2688 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2689 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2690 mode = get_irn_mode(left);
2691 right = create_conv(dbgi, right, mode_uint);
2694 case EXPR_BINARY_SUB:
2695 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2696 const pointer_type_t *const ptr_type = &type_left->pointer;
2698 mode = get_ir_mode_arithmetic(expression->base.type);
2699 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2700 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2701 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2702 ir_node *const no_mem = new_NoMem();
2703 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2704 mode, op_pin_state_floats);
2705 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2708 case EXPR_BINARY_SUB_ASSIGN:
2709 if (is_type_pointer(type_left)) {
2710 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2711 mode = get_ir_mode_arithmetic(type_left);
2716 case EXPR_BINARY_ADD:
2717 case EXPR_BINARY_ADD_ASSIGN:
2718 if (is_type_pointer(type_left)) {
2719 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2720 mode = get_ir_mode_arithmetic(type_left);
2722 } else if (is_type_pointer(type_right)) {
2723 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2724 mode = get_ir_mode_arithmetic(type_right);
2731 mode = get_ir_mode_arithmetic(type_right);
2732 left = create_conv(dbgi, left, mode);
2737 case EXPR_BINARY_ADD_ASSIGN:
2738 case EXPR_BINARY_ADD:
2739 return new_d_Add(dbgi, left, right, mode);
2740 case EXPR_BINARY_SUB_ASSIGN:
2741 case EXPR_BINARY_SUB:
2742 return new_d_Sub(dbgi, left, right, mode);
2743 case EXPR_BINARY_MUL_ASSIGN:
2744 case EXPR_BINARY_MUL:
2745 return new_d_Mul(dbgi, left, right, mode);
2746 case EXPR_BINARY_BITWISE_AND:
2747 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2748 return new_d_And(dbgi, left, right, mode);
2749 case EXPR_BINARY_BITWISE_OR:
2750 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2751 return new_d_Or(dbgi, left, right, mode);
2752 case EXPR_BINARY_BITWISE_XOR:
2753 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2754 return new_d_Eor(dbgi, left, right, mode);
2755 case EXPR_BINARY_SHIFTLEFT:
2756 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2757 return new_d_Shl(dbgi, left, right, mode);
2758 case EXPR_BINARY_SHIFTRIGHT:
2759 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2760 if (mode_is_signed(mode)) {
2761 return new_d_Shrs(dbgi, left, right, mode);
2763 return new_d_Shr(dbgi, left, right, mode);
2765 case EXPR_BINARY_DIV:
2766 case EXPR_BINARY_DIV_ASSIGN: {
2767 ir_node *pin = new_Pin(new_NoMem());
2770 if (mode_is_float(mode)) {
2771 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2772 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2774 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2775 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2779 case EXPR_BINARY_MOD:
2780 case EXPR_BINARY_MOD_ASSIGN: {
2781 ir_node *pin = new_Pin(new_NoMem());
2782 assert(!mode_is_float(mode));
2783 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2784 op_pin_state_floats);
2785 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2789 panic("unexpected expression kind");
2793 static ir_node *create_lazy_op(const binary_expression_t *expression)
2795 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2796 type_t *type = skip_typeref(expression->base.type);
2797 ir_mode *mode = get_ir_mode_arithmetic(type);
2799 if (is_constant_expression(expression->left)) {
2800 bool val = fold_constant_to_bool(expression->left);
2801 expression_kind_t ekind = expression->base.kind;
2802 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2803 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2805 return new_Const(get_mode_null(mode));
2809 return new_Const(get_mode_one(mode));
2813 if (is_constant_expression(expression->right)) {
2814 bool valr = fold_constant_to_bool(expression->right);
2816 new_Const(get_mode_one(mode)) :
2817 new_Const(get_mode_null(mode));
2820 return produce_condition_result(expression->right, mode, dbgi);
2823 return produce_condition_result((const expression_t*) expression, mode,
2827 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2828 ir_node *right, ir_mode *mode);
2830 static ir_node *create_assign_binop(const binary_expression_t *expression)
2832 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2833 const expression_t *left_expr = expression->left;
2834 type_t *type = skip_typeref(left_expr->base.type);
2835 ir_node *right = expression_to_firm(expression->right);
2836 ir_node *left_addr = expression_to_addr(left_expr);
2837 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2838 ir_node *result = create_op(dbgi, expression, left, right);
2840 result = create_cast(dbgi, result, expression->right->base.type, type);
2841 result = do_strict_conv(dbgi, result);
2843 result = set_value_for_expression_addr(left_expr, result, left_addr);
2845 if (!is_type_compound(type)) {
2846 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2847 result = create_conv(dbgi, result, mode_arithmetic);
2852 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2854 expression_kind_t kind = expression->base.kind;
2857 case EXPR_BINARY_EQUAL:
2858 case EXPR_BINARY_NOTEQUAL:
2859 case EXPR_BINARY_LESS:
2860 case EXPR_BINARY_LESSEQUAL:
2861 case EXPR_BINARY_GREATER:
2862 case EXPR_BINARY_GREATEREQUAL:
2863 case EXPR_BINARY_ISGREATER:
2864 case EXPR_BINARY_ISGREATEREQUAL:
2865 case EXPR_BINARY_ISLESS:
2866 case EXPR_BINARY_ISLESSEQUAL:
2867 case EXPR_BINARY_ISLESSGREATER:
2868 case EXPR_BINARY_ISUNORDERED: {
2869 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2870 ir_node *left = expression_to_firm(expression->left);
2871 ir_node *right = expression_to_firm(expression->right);
2872 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2873 long pnc = get_pnc(kind, expression->left->base.type);
2874 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2877 case EXPR_BINARY_ASSIGN: {
2878 ir_node *addr = expression_to_addr(expression->left);
2879 ir_node *right = expression_to_firm(expression->right);
2881 = set_value_for_expression_addr(expression->left, right, addr);
2883 type_t *type = skip_typeref(expression->base.type);
2884 if (!is_type_compound(type)) {
2885 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2886 res = create_conv(NULL, res, mode_arithmetic);
2890 case EXPR_BINARY_ADD:
2891 case EXPR_BINARY_SUB:
2892 case EXPR_BINARY_MUL:
2893 case EXPR_BINARY_DIV:
2894 case EXPR_BINARY_MOD:
2895 case EXPR_BINARY_BITWISE_AND:
2896 case EXPR_BINARY_BITWISE_OR:
2897 case EXPR_BINARY_BITWISE_XOR:
2898 case EXPR_BINARY_SHIFTLEFT:
2899 case EXPR_BINARY_SHIFTRIGHT:
2901 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2902 ir_node *left = expression_to_firm(expression->left);
2903 ir_node *right = expression_to_firm(expression->right);
2904 return create_op(dbgi, expression, left, right);
2906 case EXPR_BINARY_LOGICAL_AND:
2907 case EXPR_BINARY_LOGICAL_OR:
2908 return create_lazy_op(expression);
2909 case EXPR_BINARY_COMMA:
2910 /* create side effects of left side */
2911 (void) expression_to_firm(expression->left);
2912 return _expression_to_firm(expression->right);
2914 case EXPR_BINARY_ADD_ASSIGN:
2915 case EXPR_BINARY_SUB_ASSIGN:
2916 case EXPR_BINARY_MUL_ASSIGN:
2917 case EXPR_BINARY_MOD_ASSIGN:
2918 case EXPR_BINARY_DIV_ASSIGN:
2919 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2920 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2921 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2922 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2923 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2924 return create_assign_binop(expression);
2926 panic("TODO binexpr type");
2930 static ir_node *array_access_addr(const array_access_expression_t *expression)
2932 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2933 ir_node *base_addr = expression_to_firm(expression->array_ref);
2934 ir_node *offset = expression_to_firm(expression->index);
2935 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2936 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2937 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2942 static ir_node *array_access_to_firm(
2943 const array_access_expression_t *expression)
2945 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2946 ir_node *addr = array_access_addr(expression);
2947 type_t *type = revert_automatic_type_conversion(
2948 (const expression_t*) expression);
2949 type = skip_typeref(type);
2951 return deref_address(dbgi, type, addr);
2954 static long get_offsetof_offset(const offsetof_expression_t *expression)
2956 type_t *orig_type = expression->type;
2959 designator_t *designator = expression->designator;
2960 for ( ; designator != NULL; designator = designator->next) {
2961 type_t *type = skip_typeref(orig_type);
2962 /* be sure the type is constructed */
2963 (void) get_ir_type(type);
2965 if (designator->symbol != NULL) {
2966 assert(is_type_compound(type));
2967 symbol_t *symbol = designator->symbol;
2969 compound_t *compound = type->compound.compound;
2970 entity_t *iter = compound->members.entities;
2971 for ( ; iter != NULL; iter = iter->base.next) {
2972 if (iter->base.symbol == symbol) {
2976 assert(iter != NULL);
2978 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2979 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2980 offset += get_entity_offset(iter->compound_member.entity);
2982 orig_type = iter->declaration.type;
2984 expression_t *array_index = designator->array_index;
2985 assert(designator->array_index != NULL);
2986 assert(is_type_array(type));
2988 long index = fold_constant_to_int(array_index);
2989 ir_type *arr_type = get_ir_type(type);
2990 ir_type *elem_type = get_array_element_type(arr_type);
2991 long elem_size = get_type_size_bytes(elem_type);
2993 offset += index * elem_size;
2995 orig_type = type->array.element_type;
3002 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
3004 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3005 long offset = get_offsetof_offset(expression);
3006 ir_tarval *tv = new_tarval_from_long(offset, mode);
3007 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3009 return new_d_Const(dbgi, tv);
3012 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3013 ir_entity *entity, type_t *type);
3015 static ir_node *compound_literal_to_firm(
3016 const compound_literal_expression_t *expression)
3018 type_t *type = expression->type;
3020 /* create an entity on the stack */
3021 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3023 ident *const id = id_unique("CompLit.%u");
3024 ir_type *const irtype = get_ir_type(type);
3025 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3026 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
3027 set_entity_ld_ident(entity, id);
3029 /* create initialisation code */
3030 initializer_t *initializer = expression->initializer;
3031 create_local_initializer(initializer, dbgi, entity, type);
3033 /* create a sel for the compound literal address */
3034 ir_node *frame = get_irg_frame(current_ir_graph);
3035 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3040 * Transform a sizeof expression into Firm code.
3042 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
3044 type_t *const type = skip_typeref(expression->type);
3045 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
3046 if (is_type_array(type) && type->array.is_vla
3047 && expression->tp_expression != NULL) {
3048 expression_to_firm(expression->tp_expression);
3051 return get_type_size_node(type);
3054 static entity_t *get_expression_entity(const expression_t *expression)
3056 if (expression->kind != EXPR_REFERENCE)
3059 return expression->reference.entity;
3062 static unsigned get_cparser_entity_alignment(const entity_t *entity)
3064 switch(entity->kind) {
3065 DECLARATION_KIND_CASES
3066 return entity->declaration.alignment;
3069 return entity->compound.alignment;
3070 case ENTITY_TYPEDEF:
3071 return entity->typedefe.alignment;
3079 * Transform an alignof expression into Firm code.
3081 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
3083 unsigned alignment = 0;
3085 const expression_t *tp_expression = expression->tp_expression;
3086 if (tp_expression != NULL) {
3087 entity_t *entity = get_expression_entity(tp_expression);
3088 if (entity != NULL) {
3089 alignment = get_cparser_entity_alignment(entity);
3093 if (alignment == 0) {
3094 type_t *type = expression->type;
3095 alignment = get_type_alignment(type);
3098 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3099 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3100 ir_tarval *tv = new_tarval_from_long(alignment, mode);
3101 return new_d_Const(dbgi, tv);
3104 static void init_ir_types(void);
3106 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
3108 assert(is_type_valid(skip_typeref(expression->base.type)));
3110 bool constant_folding_old = constant_folding;
3111 constant_folding = true;
3115 assert(is_constant_expression(expression));
3117 ir_graph *old_current_ir_graph = current_ir_graph;
3118 current_ir_graph = get_const_code_irg();
3120 ir_node *cnst = expression_to_firm(expression);
3121 current_ir_graph = old_current_ir_graph;
3123 if (!is_Const(cnst)) {
3124 panic("couldn't fold constant");
3127 constant_folding = constant_folding_old;
3129 return get_Const_tarval(cnst);
3132 long fold_constant_to_int(const expression_t *expression)
3134 if (expression->kind == EXPR_INVALID)
3137 ir_tarval *tv = fold_constant_to_tarval(expression);
3138 if (!tarval_is_long(tv)) {
3139 panic("result of constant folding is not integer");
3142 return get_tarval_long(tv);
3145 bool fold_constant_to_bool(const expression_t *expression)
3147 if (expression->kind == EXPR_INVALID)
3149 ir_tarval *tv = fold_constant_to_tarval(expression);
3150 return !tarval_is_null(tv);
3153 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3155 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3157 /* first try to fold a constant condition */
3158 if (is_constant_expression(expression->condition)) {
3159 bool val = fold_constant_to_bool(expression->condition);
3161 expression_t *true_expression = expression->true_expression;
3162 if (true_expression == NULL)
3163 true_expression = expression->condition;
3164 return expression_to_firm(true_expression);
3166 return expression_to_firm(expression->false_expression);
3170 ir_node *const true_block = new_immBlock();
3171 ir_node *const false_block = new_immBlock();
3172 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3173 mature_immBlock(true_block);
3174 mature_immBlock(false_block);
3176 set_cur_block(true_block);
3178 if (expression->true_expression != NULL) {
3179 true_val = expression_to_firm(expression->true_expression);
3180 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3181 true_val = cond_expr;
3183 /* Condition ended with a short circuit (&&, ||, !) operation or a
3184 * comparison. Generate a "1" as value for the true branch. */
3185 true_val = new_Const(get_mode_one(mode_Is));
3187 ir_node *const true_jmp = new_d_Jmp(dbgi);
3189 set_cur_block(false_block);
3190 ir_node *const false_val = expression_to_firm(expression->false_expression);
3191 ir_node *const false_jmp = new_d_Jmp(dbgi);
3193 /* create the common block */
3194 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3195 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3196 set_cur_block(block);
3198 /* TODO improve static semantics, so either both or no values are NULL */
3199 if (true_val == NULL || false_val == NULL)
3202 ir_node *const in[2] = { true_val, false_val };
3203 ir_mode *const mode = get_irn_mode(true_val);
3204 assert(get_irn_mode(false_val) == mode);
3205 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3211 * Returns an IR-node representing the address of a field.
3213 static ir_node *select_addr(const select_expression_t *expression)
3215 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3217 construct_select_compound(expression);
3219 ir_node *compound_addr = expression_to_firm(expression->compound);
3221 entity_t *entry = expression->compound_entry;
3222 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3223 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3225 if (constant_folding) {
3226 ir_mode *mode = get_irn_mode(compound_addr);
3227 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3228 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3229 return new_d_Add(dbgi, compound_addr, ofs, mode);
3231 ir_entity *irentity = entry->compound_member.entity;
3232 assert(irentity != NULL);
3233 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3237 static ir_node *select_to_firm(const select_expression_t *expression)
3239 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3240 ir_node *addr = select_addr(expression);
3241 type_t *type = revert_automatic_type_conversion(
3242 (const expression_t*) expression);
3243 type = skip_typeref(type);
3245 entity_t *entry = expression->compound_entry;
3246 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3247 type_t *entry_type = skip_typeref(entry->declaration.type);
3249 if (entry_type->kind == TYPE_BITFIELD) {
3250 return bitfield_extract_to_firm(expression, addr);
3253 return deref_address(dbgi, type, addr);
3256 /* Values returned by __builtin_classify_type. */
3257 typedef enum gcc_type_class
3263 enumeral_type_class,
3266 reference_type_class,
3270 function_type_class,
3281 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3283 type_t *type = expr->type_expression->base.type;
3285 /* FIXME gcc returns different values depending on whether compiling C or C++
3286 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3289 type = skip_typeref(type);
3290 switch (type->kind) {
3292 const atomic_type_t *const atomic_type = &type->atomic;
3293 switch (atomic_type->akind) {
3294 /* should not be reached */
3295 case ATOMIC_TYPE_INVALID:
3299 /* gcc cannot do that */
3300 case ATOMIC_TYPE_VOID:
3301 tc = void_type_class;
3304 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3305 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3306 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3307 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3308 case ATOMIC_TYPE_SHORT:
3309 case ATOMIC_TYPE_USHORT:
3310 case ATOMIC_TYPE_INT:
3311 case ATOMIC_TYPE_UINT:
3312 case ATOMIC_TYPE_LONG:
3313 case ATOMIC_TYPE_ULONG:
3314 case ATOMIC_TYPE_LONGLONG:
3315 case ATOMIC_TYPE_ULONGLONG:
3316 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3317 tc = integer_type_class;
3320 case ATOMIC_TYPE_FLOAT:
3321 case ATOMIC_TYPE_DOUBLE:
3322 case ATOMIC_TYPE_LONG_DOUBLE:
3323 tc = real_type_class;
3326 panic("Unexpected atomic type in classify_type_to_firm().");
3329 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3330 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3331 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3332 case TYPE_ARRAY: /* gcc handles this as pointer */
3333 case TYPE_FUNCTION: /* gcc handles this as pointer */
3334 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3335 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3336 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3338 /* gcc handles this as integer */
3339 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3341 /* gcc classifies the referenced type */
3342 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3345 /* typedef/typeof should be skipped already */
3352 panic("unexpected TYPE classify_type_to_firm().");
3356 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3357 ir_tarval *const tv = new_tarval_from_long(tc, mode_int);
3358 return new_d_Const(dbgi, tv);
3361 static ir_node *function_name_to_firm(
3362 const funcname_expression_t *const expr)
3364 switch(expr->kind) {
3365 case FUNCNAME_FUNCTION:
3366 case FUNCNAME_PRETTY_FUNCTION:
3367 case FUNCNAME_FUNCDNAME:
3368 if (current_function_name == NULL) {
3369 const source_position_t *const src_pos = &expr->base.source_position;
3370 const char *name = current_function_entity->base.symbol->string;
3371 const string_t string = { name, strlen(name) + 1 };
3372 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3374 return current_function_name;
3375 case FUNCNAME_FUNCSIG:
3376 if (current_funcsig == NULL) {
3377 const source_position_t *const src_pos = &expr->base.source_position;
3378 ir_entity *ent = get_irg_entity(current_ir_graph);
3379 const char *const name = get_entity_ld_name(ent);
3380 const string_t string = { name, strlen(name) + 1 };
3381 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3383 return current_funcsig;
3385 panic("Unsupported function name");
3388 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3390 statement_t *statement = expr->statement;
3392 assert(statement->kind == STATEMENT_COMPOUND);
3393 return compound_statement_to_firm(&statement->compound);
3396 static ir_node *va_start_expression_to_firm(
3397 const va_start_expression_t *const expr)
3399 type_t *const type = current_function_entity->declaration.type;
3400 ir_type *const method_type = get_ir_type(type);
3401 int const n = get_method_n_params(method_type) - 1;
3402 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3403 ir_node *const frame = get_irg_frame(current_ir_graph);
3404 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3405 ir_node *const no_mem = new_NoMem();
3406 ir_node *const arg_sel =
3407 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3409 type_t *const param_type = expr->parameter->base.type;
3410 ir_node *const cnst = get_type_size_node(param_type);
3411 ir_mode *const mode = get_irn_mode(cnst);
3412 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3413 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3414 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3415 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3416 ir_node *const add = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3417 set_value_for_expression(expr->ap, add);
3422 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3424 type_t *const type = expr->base.type;
3425 expression_t *const ap_expr = expr->ap;
3426 ir_node *const ap_addr = expression_to_addr(ap_expr);
3427 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3428 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3429 ir_node *const res = deref_address(dbgi, type, ap);
3431 ir_node *const cnst = get_type_size_node(expr->base.type);
3432 ir_mode *const mode = get_irn_mode(cnst);
3433 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3434 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3435 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3436 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3437 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3439 set_value_for_expression_addr(ap_expr, add, ap_addr);
3445 * Generate Firm for a va_copy expression.
3447 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3449 ir_node *const src = expression_to_firm(expr->src);
3450 set_value_for_expression(expr->dst, src);
3454 static ir_node *dereference_addr(const unary_expression_t *const expression)
3456 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3457 return expression_to_firm(expression->value);
3461 * Returns a IR-node representing an lvalue of the given expression.
3463 static ir_node *expression_to_addr(const expression_t *expression)
3465 switch(expression->kind) {
3466 case EXPR_ARRAY_ACCESS:
3467 return array_access_addr(&expression->array_access);
3469 return call_expression_to_firm(&expression->call);
3470 case EXPR_COMPOUND_LITERAL:
3471 return compound_literal_to_firm(&expression->compound_literal);
3472 case EXPR_REFERENCE:
3473 return reference_addr(&expression->reference);
3475 return select_addr(&expression->select);
3476 case EXPR_UNARY_DEREFERENCE:
3477 return dereference_addr(&expression->unary);
3481 panic("trying to get address of non-lvalue");
3484 static ir_node *builtin_constant_to_firm(
3485 const builtin_constant_expression_t *expression)
3487 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3490 if (is_constant_expression(expression->value)) {
3495 return new_Const_long(mode, v);
3498 static ir_node *builtin_types_compatible_to_firm(
3499 const builtin_types_compatible_expression_t *expression)
3501 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3502 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3503 long const value = types_compatible(left, right) ? 1 : 0;
3504 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3505 return new_Const_long(mode, value);
3508 static ir_node *get_label_block(label_t *label)
3510 if (label->block != NULL)
3511 return label->block;
3513 /* beware: might be called from create initializer with current_ir_graph
3514 * set to const_code_irg. */
3515 ir_graph *rem = current_ir_graph;
3516 current_ir_graph = current_function;
3518 ir_node *block = new_immBlock();
3520 label->block = block;
3522 ARR_APP1(label_t *, all_labels, label);
3524 current_ir_graph = rem;
3529 * Pointer to a label. This is used for the
3530 * GNU address-of-label extension.
3532 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3534 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3535 ir_node *block = get_label_block(label->label);
3536 ir_entity *entity = create_Block_entity(block);
3538 symconst_symbol value;
3539 value.entity_p = entity;
3540 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3544 * creates firm nodes for an expression. The difference between this function
3545 * and expression_to_firm is, that this version might produce mode_b nodes
3546 * instead of mode_Is.
3548 static ir_node *_expression_to_firm(const expression_t *expression)
3551 if (!constant_folding) {
3552 assert(!expression->base.transformed);
3553 ((expression_t*) expression)->base.transformed = true;
3557 switch (expression->kind) {
3559 return literal_to_firm(&expression->literal);
3560 case EXPR_STRING_LITERAL:
3561 return string_to_firm(&expression->base.source_position, "str.%u",
3562 &expression->literal.value);
3563 case EXPR_WIDE_STRING_LITERAL:
3564 return wide_string_literal_to_firm(&expression->string_literal);
3565 case EXPR_REFERENCE:
3566 return reference_expression_to_firm(&expression->reference);
3567 case EXPR_REFERENCE_ENUM_VALUE:
3568 return reference_expression_enum_value_to_firm(&expression->reference);
3570 return call_expression_to_firm(&expression->call);
3572 return unary_expression_to_firm(&expression->unary);
3574 return binary_expression_to_firm(&expression->binary);
3575 case EXPR_ARRAY_ACCESS:
3576 return array_access_to_firm(&expression->array_access);
3578 return sizeof_to_firm(&expression->typeprop);
3580 return alignof_to_firm(&expression->typeprop);
3581 case EXPR_CONDITIONAL:
3582 return conditional_to_firm(&expression->conditional);
3584 return select_to_firm(&expression->select);
3585 case EXPR_CLASSIFY_TYPE:
3586 return classify_type_to_firm(&expression->classify_type);
3588 return function_name_to_firm(&expression->funcname);
3589 case EXPR_STATEMENT:
3590 return statement_expression_to_firm(&expression->statement);
3592 return va_start_expression_to_firm(&expression->va_starte);
3594 return va_arg_expression_to_firm(&expression->va_arge);
3596 return va_copy_expression_to_firm(&expression->va_copye);
3597 case EXPR_BUILTIN_CONSTANT_P:
3598 return builtin_constant_to_firm(&expression->builtin_constant);
3599 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3600 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3602 return offsetof_to_firm(&expression->offsetofe);
3603 case EXPR_COMPOUND_LITERAL:
3604 return compound_literal_to_firm(&expression->compound_literal);
3605 case EXPR_LABEL_ADDRESS:
3606 return label_address_to_firm(&expression->label_address);
3612 panic("invalid expression found");
3616 * Check if a given expression is a GNU __builtin_expect() call.
3618 static bool is_builtin_expect(const expression_t *expression)
3620 if (expression->kind != EXPR_CALL)
3623 expression_t *function = expression->call.function;
3624 if (function->kind != EXPR_REFERENCE)
3626 reference_expression_t *ref = &function->reference;
3627 if (ref->entity->kind != ENTITY_FUNCTION ||
3628 ref->entity->function.btk != bk_gnu_builtin_expect)
3634 static bool produces_mode_b(const expression_t *expression)
3636 switch (expression->kind) {
3637 case EXPR_BINARY_EQUAL:
3638 case EXPR_BINARY_NOTEQUAL:
3639 case EXPR_BINARY_LESS:
3640 case EXPR_BINARY_LESSEQUAL:
3641 case EXPR_BINARY_GREATER:
3642 case EXPR_BINARY_GREATEREQUAL:
3643 case EXPR_BINARY_ISGREATER:
3644 case EXPR_BINARY_ISGREATEREQUAL:
3645 case EXPR_BINARY_ISLESS:
3646 case EXPR_BINARY_ISLESSEQUAL:
3647 case EXPR_BINARY_ISLESSGREATER:
3648 case EXPR_BINARY_ISUNORDERED:
3649 case EXPR_UNARY_NOT:
3653 if (is_builtin_expect(expression)) {
3654 expression_t *argument = expression->call.arguments->expression;
3655 return produces_mode_b(argument);
3658 case EXPR_BINARY_COMMA:
3659 return produces_mode_b(expression->binary.right);
3666 static ir_node *expression_to_firm(const expression_t *expression)
3668 if (!produces_mode_b(expression)) {
3669 ir_node *res = _expression_to_firm(expression);
3670 assert(res == NULL || get_irn_mode(res) != mode_b);
3674 if (is_constant_expression(expression)) {
3675 ir_node *res = _expression_to_firm(expression);
3676 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3677 assert(is_Const(res));
3678 if (is_Const_null(res)) {
3679 return new_Const_long(mode, 0);
3681 return new_Const_long(mode, 1);
3685 /* we have to produce a 0/1 from the mode_b expression */
3686 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3687 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3688 return produce_condition_result(expression, mode, dbgi);
3692 * create a short-circuit expression evaluation that tries to construct
3693 * efficient control flow structures for &&, || and ! expressions
3695 static ir_node *create_condition_evaluation(const expression_t *expression,
3696 ir_node *true_block,
3697 ir_node *false_block)
3699 switch(expression->kind) {
3700 case EXPR_UNARY_NOT: {
3701 const unary_expression_t *unary_expression = &expression->unary;
3702 create_condition_evaluation(unary_expression->value, false_block,
3706 case EXPR_BINARY_LOGICAL_AND: {
3707 const binary_expression_t *binary_expression = &expression->binary;
3709 ir_node *extra_block = new_immBlock();
3710 create_condition_evaluation(binary_expression->left, extra_block,
3712 mature_immBlock(extra_block);
3713 set_cur_block(extra_block);
3714 create_condition_evaluation(binary_expression->right, true_block,
3718 case EXPR_BINARY_LOGICAL_OR: {
3719 const binary_expression_t *binary_expression = &expression->binary;
3721 ir_node *extra_block = new_immBlock();
3722 create_condition_evaluation(binary_expression->left, true_block,
3724 mature_immBlock(extra_block);
3725 set_cur_block(extra_block);
3726 create_condition_evaluation(binary_expression->right, true_block,
3734 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3735 ir_node *cond_expr = _expression_to_firm(expression);
3736 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3737 ir_node *cond = new_d_Cond(dbgi, condition);
3738 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3739 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3741 /* set branch prediction info based on __builtin_expect */
3742 if (is_builtin_expect(expression) && is_Cond(cond)) {
3743 call_argument_t *argument = expression->call.arguments->next;
3744 if (is_constant_expression(argument->expression)) {
3745 bool cnst = fold_constant_to_bool(argument->expression);
3746 cond_jmp_predicate pred;
3748 if (cnst == false) {
3749 pred = COND_JMP_PRED_FALSE;
3751 pred = COND_JMP_PRED_TRUE;
3753 set_Cond_jmp_pred(cond, pred);
3757 add_immBlock_pred(true_block, true_proj);
3758 add_immBlock_pred(false_block, false_proj);
3760 set_cur_block(NULL);
3764 static void create_variable_entity(entity_t *variable,
3765 declaration_kind_t declaration_kind,
3766 ir_type *parent_type)
3768 assert(variable->kind == ENTITY_VARIABLE);
3769 type_t *type = skip_typeref(variable->declaration.type);
3771 ident *const id = new_id_from_str(variable->base.symbol->string);
3772 ir_type *const irtype = get_ir_type(type);
3773 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3774 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3775 unsigned alignment = variable->declaration.alignment;
3777 set_entity_alignment(irentity, alignment);
3779 handle_decl_modifiers(irentity, variable);
3781 variable->declaration.kind = (unsigned char) declaration_kind;
3782 variable->variable.v.entity = irentity;
3783 set_entity_ld_ident(irentity, create_ld_ident(variable));
3785 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3786 set_entity_volatility(irentity, volatility_is_volatile);
3791 typedef struct type_path_entry_t type_path_entry_t;
3792 struct type_path_entry_t {
3794 ir_initializer_t *initializer;
3796 entity_t *compound_entry;
3799 typedef struct type_path_t type_path_t;
3800 struct type_path_t {
3801 type_path_entry_t *path;
3806 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3808 size_t len = ARR_LEN(path->path);
3810 for (size_t i = 0; i < len; ++i) {
3811 const type_path_entry_t *entry = & path->path[i];
3813 type_t *type = skip_typeref(entry->type);
3814 if (is_type_compound(type)) {
3815 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3816 } else if (is_type_array(type)) {
3817 fprintf(stderr, "[%u]", (unsigned) entry->index);
3819 fprintf(stderr, "-INVALID-");
3822 fprintf(stderr, " (");
3823 print_type(path->top_type);
3824 fprintf(stderr, ")");
3827 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3829 size_t len = ARR_LEN(path->path);
3831 return & path->path[len-1];
3834 static type_path_entry_t *append_to_type_path(type_path_t *path)
3836 size_t len = ARR_LEN(path->path);
3837 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3839 type_path_entry_t *result = & path->path[len];
3840 memset(result, 0, sizeof(result[0]));
3844 static size_t get_compound_member_count(const compound_type_t *type)
3846 compound_t *compound = type->compound;
3847 size_t n_members = 0;
3848 entity_t *member = compound->members.entities;
3849 for ( ; member != NULL; member = member->base.next) {
3856 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3858 type_t *orig_top_type = path->top_type;
3859 type_t *top_type = skip_typeref(orig_top_type);
3861 assert(is_type_compound(top_type) || is_type_array(top_type));
3863 if (ARR_LEN(path->path) == 0) {
3866 type_path_entry_t *top = get_type_path_top(path);
3867 ir_initializer_t *initializer = top->initializer;
3868 return get_initializer_compound_value(initializer, top->index);
3872 static void descend_into_subtype(type_path_t *path)
3874 type_t *orig_top_type = path->top_type;
3875 type_t *top_type = skip_typeref(orig_top_type);
3877 assert(is_type_compound(top_type) || is_type_array(top_type));
3879 ir_initializer_t *initializer = get_initializer_entry(path);
3881 type_path_entry_t *top = append_to_type_path(path);
3882 top->type = top_type;
3886 if (is_type_compound(top_type)) {
3887 compound_t *compound = top_type->compound.compound;
3888 entity_t *entry = compound->members.entities;
3890 top->compound_entry = entry;
3892 len = get_compound_member_count(&top_type->compound);
3893 if (entry != NULL) {
3894 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3895 path->top_type = entry->declaration.type;
3898 assert(is_type_array(top_type));
3899 assert(top_type->array.size > 0);
3902 path->top_type = top_type->array.element_type;
3903 len = top_type->array.size;
3905 if (initializer == NULL
3906 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3907 initializer = create_initializer_compound(len);
3908 /* we have to set the entry at the 2nd latest path entry... */
3909 size_t path_len = ARR_LEN(path->path);
3910 assert(path_len >= 1);
3912 type_path_entry_t *entry = & path->path[path_len-2];
3913 ir_initializer_t *tinitializer = entry->initializer;
3914 set_initializer_compound_value(tinitializer, entry->index,
3918 top->initializer = initializer;
3921 static void ascend_from_subtype(type_path_t *path)
3923 type_path_entry_t *top = get_type_path_top(path);
3925 path->top_type = top->type;
3927 size_t len = ARR_LEN(path->path);
3928 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3931 static void walk_designator(type_path_t *path, const designator_t *designator)
3933 /* designators start at current object type */
3934 ARR_RESIZE(type_path_entry_t, path->path, 1);
3936 for ( ; designator != NULL; designator = designator->next) {
3937 type_path_entry_t *top = get_type_path_top(path);
3938 type_t *orig_type = top->type;
3939 type_t *type = skip_typeref(orig_type);
3941 if (designator->symbol != NULL) {
3942 assert(is_type_compound(type));
3944 symbol_t *symbol = designator->symbol;
3946 compound_t *compound = type->compound.compound;
3947 entity_t *iter = compound->members.entities;
3948 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3949 if (iter->base.symbol == symbol) {
3950 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3954 assert(iter != NULL);
3956 /* revert previous initialisations of other union elements */
3957 if (type->kind == TYPE_COMPOUND_UNION) {
3958 ir_initializer_t *initializer = top->initializer;
3959 if (initializer != NULL
3960 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3961 /* are we writing to a new element? */
3962 ir_initializer_t *oldi
3963 = get_initializer_compound_value(initializer, index);
3964 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3965 /* clear initializer */
3967 = get_initializer_compound_n_entries(initializer);
3968 ir_initializer_t *nulli = get_initializer_null();
3969 for (size_t i = 0; i < len; ++i) {
3970 set_initializer_compound_value(initializer, i,
3977 top->type = orig_type;
3978 top->compound_entry = iter;
3980 orig_type = iter->declaration.type;
3982 expression_t *array_index = designator->array_index;
3983 assert(designator->array_index != NULL);
3984 assert(is_type_array(type));
3986 long index = fold_constant_to_int(array_index);
3989 if (type->array.size_constant) {
3990 long array_size = type->array.size;
3991 assert(index < array_size);
3995 top->type = orig_type;
3996 top->index = (size_t) index;
3997 orig_type = type->array.element_type;
3999 path->top_type = orig_type;
4001 if (designator->next != NULL) {
4002 descend_into_subtype(path);
4006 path->invalid = false;
4009 static void advance_current_object(type_path_t *path)
4011 if (path->invalid) {
4012 /* TODO: handle this... */
4013 panic("invalid initializer in ast2firm (excessive elements)");
4016 type_path_entry_t *top = get_type_path_top(path);
4018 type_t *type = skip_typeref(top->type);
4019 if (is_type_union(type)) {
4020 /* only the first element is initialized in unions */
4021 top->compound_entry = NULL;
4022 } else if (is_type_struct(type)) {
4023 entity_t *entry = top->compound_entry;
4026 entry = entry->base.next;
4027 top->compound_entry = entry;
4028 if (entry != NULL) {
4029 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4030 path->top_type = entry->declaration.type;
4034 assert(is_type_array(type));
4037 if (!type->array.size_constant || top->index < type->array.size) {
4042 /* we're past the last member of the current sub-aggregate, try if we
4043 * can ascend in the type hierarchy and continue with another subobject */
4044 size_t len = ARR_LEN(path->path);
4047 ascend_from_subtype(path);
4048 advance_current_object(path);
4050 path->invalid = true;
4055 static ir_initializer_t *create_ir_initializer(
4056 const initializer_t *initializer, type_t *type);
4058 static ir_initializer_t *create_ir_initializer_value(
4059 const initializer_value_t *initializer)
4061 if (is_type_compound(initializer->value->base.type)) {
4062 panic("initializer creation for compounds not implemented yet");
4064 type_t *type = initializer->value->base.type;
4065 expression_t *expr = initializer->value;
4066 if (initializer_use_bitfield_basetype) {
4067 type_t *skipped = skip_typeref(type);
4068 if (skipped->kind == TYPE_BITFIELD) {
4069 /* remove the bitfield cast... */
4070 assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
4071 expr = expr->unary.value;
4072 type = skipped->bitfield.base_type;
4075 ir_node *value = expression_to_firm(expr);
4076 ir_mode *mode = get_ir_mode_storage(type);
4077 value = create_conv(NULL, value, mode);
4078 return create_initializer_const(value);
4081 /** test wether type can be initialized by a string constant */
4082 static bool is_string_type(type_t *type)
4085 if (is_type_pointer(type)) {
4086 inner = skip_typeref(type->pointer.points_to);
4087 } else if(is_type_array(type)) {
4088 inner = skip_typeref(type->array.element_type);
4093 return is_type_integer(inner);
4096 static ir_initializer_t *create_ir_initializer_list(
4097 const initializer_list_t *initializer, type_t *type)
4100 memset(&path, 0, sizeof(path));
4101 path.top_type = type;
4102 path.path = NEW_ARR_F(type_path_entry_t, 0);
4104 descend_into_subtype(&path);
4106 for (size_t i = 0; i < initializer->len; ++i) {
4107 const initializer_t *sub_initializer = initializer->initializers[i];
4109 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4110 walk_designator(&path, sub_initializer->designator.designator);
4114 if (sub_initializer->kind == INITIALIZER_VALUE) {
4115 /* we might have to descend into types until we're at a scalar
4118 type_t *orig_top_type = path.top_type;
4119 type_t *top_type = skip_typeref(orig_top_type);
4121 if (is_type_scalar(top_type))
4123 descend_into_subtype(&path);
4125 } else if (sub_initializer->kind == INITIALIZER_STRING
4126 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4127 /* we might have to descend into types until we're at a scalar
4130 type_t *orig_top_type = path.top_type;
4131 type_t *top_type = skip_typeref(orig_top_type);
4133 if (is_string_type(top_type))
4135 descend_into_subtype(&path);
4139 ir_initializer_t *sub_irinitializer
4140 = create_ir_initializer(sub_initializer, path.top_type);
4142 size_t path_len = ARR_LEN(path.path);
4143 assert(path_len >= 1);
4144 type_path_entry_t *entry = & path.path[path_len-1];
4145 ir_initializer_t *tinitializer = entry->initializer;
4146 set_initializer_compound_value(tinitializer, entry->index,
4149 advance_current_object(&path);
4152 assert(ARR_LEN(path.path) >= 1);
4153 ir_initializer_t *result = path.path[0].initializer;
4154 DEL_ARR_F(path.path);
4159 static ir_initializer_t *create_ir_initializer_string(
4160 const initializer_string_t *initializer, type_t *type)
4162 type = skip_typeref(type);
4164 size_t string_len = initializer->string.size;
4165 assert(type->kind == TYPE_ARRAY);
4166 assert(type->array.size_constant);
4167 size_t len = type->array.size;
4168 ir_initializer_t *irinitializer = create_initializer_compound(len);
4170 const char *string = initializer->string.begin;
4171 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
4173 for (size_t i = 0; i < len; ++i) {
4178 ir_tarval *tv = new_tarval_from_long(c, mode);
4179 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4181 set_initializer_compound_value(irinitializer, i, char_initializer);
4184 return irinitializer;
4187 static ir_initializer_t *create_ir_initializer_wide_string(
4188 const initializer_wide_string_t *initializer, type_t *type)
4190 assert(type->kind == TYPE_ARRAY);
4191 assert(type->array.size_constant);
4192 size_t len = type->array.size;
4193 size_t string_len = wstrlen(&initializer->string);
4194 ir_initializer_t *irinitializer = create_initializer_compound(len);
4196 const char *p = initializer->string.begin;
4197 ir_mode *mode = get_type_mode(ir_type_wchar_t);
4199 for (size_t i = 0; i < len; ++i) {
4201 if (i < string_len) {
4202 c = read_utf8_char(&p);
4204 ir_tarval *tv = new_tarval_from_long(c, mode);
4205 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4207 set_initializer_compound_value(irinitializer, i, char_initializer);
4210 return irinitializer;
4213 static ir_initializer_t *create_ir_initializer(
4214 const initializer_t *initializer, type_t *type)
4216 switch(initializer->kind) {
4217 case INITIALIZER_STRING:
4218 return create_ir_initializer_string(&initializer->string, type);
4220 case INITIALIZER_WIDE_STRING:
4221 return create_ir_initializer_wide_string(&initializer->wide_string,
4224 case INITIALIZER_LIST:
4225 return create_ir_initializer_list(&initializer->list, type);
4227 case INITIALIZER_VALUE:
4228 return create_ir_initializer_value(&initializer->value);
4230 case INITIALIZER_DESIGNATOR:
4231 panic("unexpected designator initializer found");
4233 panic("unknown initializer");
4236 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4237 * are elements [...] the remainder of the aggregate shall be initialized
4238 * implicitly the same as objects that have static storage duration. */
4239 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4242 /* for unions we must NOT do anything for null initializers */
4243 ir_type *owner = get_entity_owner(entity);
4244 if (is_Union_type(owner)) {
4248 ir_type *ent_type = get_entity_type(entity);
4249 /* create sub-initializers for a compound type */
4250 if (is_compound_type(ent_type)) {
4251 unsigned n_members = get_compound_n_members(ent_type);
4252 for (unsigned n = 0; n < n_members; ++n) {
4253 ir_entity *member = get_compound_member(ent_type, n);
4254 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4256 create_dynamic_null_initializer(member, dbgi, addr);
4260 if (is_Array_type(ent_type)) {
4261 assert(has_array_upper_bound(ent_type, 0));
4262 long n = get_array_upper_bound_int(ent_type, 0);
4263 for (long i = 0; i < n; ++i) {
4264 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4265 ir_node *cnst = new_d_Const(dbgi, index_tv);
4266 ir_node *in[1] = { cnst };
4267 ir_entity *arrent = get_array_element_entity(ent_type);
4268 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4270 create_dynamic_null_initializer(arrent, dbgi, addr);
4275 ir_mode *value_mode = get_type_mode(ent_type);
4276 ir_node *node = new_Const_long(value_mode, 0);
4278 /* is it a bitfield type? */
4279 if (is_Primitive_type(ent_type) &&
4280 get_primitive_base_type(ent_type) != NULL) {
4281 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4285 ir_node *mem = get_store();
4286 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4287 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4291 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4292 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4294 switch(get_initializer_kind(initializer)) {
4295 case IR_INITIALIZER_NULL:
4296 create_dynamic_null_initializer(entity, dbgi, base_addr);
4298 case IR_INITIALIZER_CONST: {
4299 ir_node *node = get_initializer_const_value(initializer);
4300 ir_type *ent_type = get_entity_type(entity);
4302 /* is it a bitfield type? */
4303 if (is_Primitive_type(ent_type) &&
4304 get_primitive_base_type(ent_type) != NULL) {
4305 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4309 assert(get_type_mode(type) == get_irn_mode(node));
4310 ir_node *mem = get_store();
4311 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4312 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4316 case IR_INITIALIZER_TARVAL: {
4317 ir_tarval *tv = get_initializer_tarval_value(initializer);
4318 ir_node *cnst = new_d_Const(dbgi, tv);
4319 ir_type *ent_type = get_entity_type(entity);
4321 /* is it a bitfield type? */
4322 if (is_Primitive_type(ent_type) &&
4323 get_primitive_base_type(ent_type) != NULL) {
4324 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4328 assert(get_type_mode(type) == get_tarval_mode(tv));
4329 ir_node *mem = get_store();
4330 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4331 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4335 case IR_INITIALIZER_COMPOUND: {
4336 assert(is_compound_type(type) || is_Array_type(type));
4338 if (is_Array_type(type)) {
4339 assert(has_array_upper_bound(type, 0));
4340 n_members = get_array_upper_bound_int(type, 0);
4342 n_members = get_compound_n_members(type);
4345 if (get_initializer_compound_n_entries(initializer)
4346 != (unsigned) n_members)
4347 panic("initializer doesn't match compound type");
4349 for (int i = 0; i < n_members; ++i) {
4352 ir_entity *sub_entity;
4353 if (is_Array_type(type)) {
4354 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4355 ir_node *cnst = new_d_Const(dbgi, index_tv);
4356 ir_node *in[1] = { cnst };
4357 irtype = get_array_element_type(type);
4358 sub_entity = get_array_element_entity(type);
4359 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4362 sub_entity = get_compound_member(type, i);
4363 irtype = get_entity_type(sub_entity);
4364 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4368 ir_initializer_t *sub_init
4369 = get_initializer_compound_value(initializer, i);
4371 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4378 panic("invalid IR_INITIALIZER found");
4381 static void create_dynamic_initializer(ir_initializer_t *initializer,
4382 dbg_info *dbgi, ir_entity *entity)
4384 ir_node *frame = get_irg_frame(current_ir_graph);
4385 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4386 ir_type *type = get_entity_type(entity);
4388 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4391 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4392 ir_entity *entity, type_t *type)
4394 ir_node *memory = get_store();
4395 ir_node *nomem = new_NoMem();
4396 ir_node *frame = get_irg_frame(current_ir_graph);
4397 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4399 if (initializer->kind == INITIALIZER_VALUE) {
4400 initializer_value_t *initializer_value = &initializer->value;
4402 ir_node *value = expression_to_firm(initializer_value->value);
4403 type = skip_typeref(type);
4404 assign_value(dbgi, addr, type, value);
4408 if (!is_constant_initializer(initializer)) {
4409 bool old_initializer_use_bitfield_basetype
4410 = initializer_use_bitfield_basetype;
4411 initializer_use_bitfield_basetype = true;
4412 ir_initializer_t *irinitializer
4413 = create_ir_initializer(initializer, type);
4414 initializer_use_bitfield_basetype
4415 = old_initializer_use_bitfield_basetype;
4417 create_dynamic_initializer(irinitializer, dbgi, entity);
4421 /* create the ir_initializer */
4422 ir_graph *const old_current_ir_graph = current_ir_graph;
4423 current_ir_graph = get_const_code_irg();
4425 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4427 assert(current_ir_graph == get_const_code_irg());
4428 current_ir_graph = old_current_ir_graph;
4430 /* create a "template" entity which is copied to the entity on the stack */
4431 ident *const id = id_unique("initializer.%u");
4432 ir_type *const irtype = get_ir_type(type);
4433 ir_type *const global_type = get_glob_type();
4434 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4435 set_entity_ld_ident(init_entity, id);
4437 set_entity_visibility(init_entity, ir_visibility_private);
4438 add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4440 set_entity_initializer(init_entity, irinitializer);
4442 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4443 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4445 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4446 set_store(copyb_mem);
4449 static void create_initializer_local_variable_entity(entity_t *entity)
4451 assert(entity->kind == ENTITY_VARIABLE);
4452 initializer_t *initializer = entity->variable.initializer;
4453 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4454 ir_entity *irentity = entity->variable.v.entity;
4455 type_t *type = entity->declaration.type;
4457 create_local_initializer(initializer, dbgi, irentity, type);
4460 static void create_variable_initializer(entity_t *entity)
4462 assert(entity->kind == ENTITY_VARIABLE);
4463 initializer_t *initializer = entity->variable.initializer;
4464 if (initializer == NULL)
4467 declaration_kind_t declaration_kind
4468 = (declaration_kind_t) entity->declaration.kind;
4469 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4470 create_initializer_local_variable_entity(entity);
4474 type_t *type = entity->declaration.type;
4475 type_qualifiers_t tq = get_type_qualifier(type, true);
4477 if (initializer->kind == INITIALIZER_VALUE) {
4478 initializer_value_t *initializer_value = &initializer->value;
4479 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4481 ir_node *value = expression_to_firm(initializer_value->value);
4483 type_t *type = initializer_value->value->base.type;
4484 ir_mode *mode = get_ir_mode_storage(type);
4485 value = create_conv(dbgi, value, mode);
4486 value = do_strict_conv(dbgi, value);
4488 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4489 set_value(entity->variable.v.value_number, value);
4491 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4493 ir_entity *irentity = entity->variable.v.entity;
4495 if (tq & TYPE_QUALIFIER_CONST
4496 && get_entity_owner(irentity) != get_tls_type()) {
4497 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4499 set_atomic_ent_value(irentity, value);
4502 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4503 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4505 ir_entity *irentity = entity->variable.v.entity;
4506 ir_initializer_t *irinitializer
4507 = create_ir_initializer(initializer, type);
4509 if (tq & TYPE_QUALIFIER_CONST) {
4510 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4512 set_entity_initializer(irentity, irinitializer);
4516 static void create_variable_length_array(entity_t *entity)
4518 assert(entity->kind == ENTITY_VARIABLE);
4519 assert(entity->variable.initializer == NULL);
4521 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4522 entity->variable.v.vla_base = NULL;
4524 /* TODO: record VLA somewhere so we create the free node when we leave
4528 static void allocate_variable_length_array(entity_t *entity)
4530 assert(entity->kind == ENTITY_VARIABLE);
4531 assert(entity->variable.initializer == NULL);
4532 assert(get_cur_block() != NULL);
4534 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4535 type_t *type = entity->declaration.type;
4536 ir_type *el_type = get_ir_type(type->array.element_type);
4538 /* make sure size_node is calculated */
4539 get_type_size_node(type);
4540 ir_node *elems = type->array.size_node;
4541 ir_node *mem = get_store();
4542 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4544 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4545 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4548 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4549 entity->variable.v.vla_base = addr;
4553 * Creates a Firm local variable from a declaration.
4555 static void create_local_variable(entity_t *entity)
4557 assert(entity->kind == ENTITY_VARIABLE);
4558 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4560 bool needs_entity = entity->variable.address_taken;
4561 type_t *type = skip_typeref(entity->declaration.type);
4563 /* is it a variable length array? */
4564 if (is_type_array(type) && !type->array.size_constant) {
4565 create_variable_length_array(entity);
4567 } else if (is_type_array(type) || is_type_compound(type)) {
4568 needs_entity = true;
4569 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4570 needs_entity = true;
4574 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4575 create_variable_entity(entity,
4576 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4579 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4580 entity->variable.v.value_number = next_value_number_function;
4581 set_irg_loc_description(current_ir_graph, next_value_number_function,
4583 ++next_value_number_function;
4587 static void create_local_static_variable(entity_t *entity)
4589 assert(entity->kind == ENTITY_VARIABLE);
4590 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4592 type_t *type = skip_typeref(entity->declaration.type);
4593 ir_type *const var_type = entity->variable.thread_local ?
4594 get_tls_type() : get_glob_type();
4595 ir_type *const irtype = get_ir_type(type);
4596 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4598 size_t l = strlen(entity->base.symbol->string);
4599 char buf[l + sizeof(".%u")];
4600 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4601 ident *const id = id_unique(buf);
4602 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4604 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4605 set_entity_volatility(irentity, volatility_is_volatile);
4608 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4609 entity->variable.v.entity = irentity;
4611 set_entity_ld_ident(irentity, id);
4612 set_entity_visibility(irentity, ir_visibility_local);
4614 ir_graph *const old_current_ir_graph = current_ir_graph;
4615 current_ir_graph = get_const_code_irg();
4617 create_variable_initializer(entity);
4619 assert(current_ir_graph == get_const_code_irg());
4620 current_ir_graph = old_current_ir_graph;
4625 static void return_statement_to_firm(return_statement_t *statement)
4627 if (get_cur_block() == NULL)
4630 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4631 type_t *type = current_function_entity->declaration.type;
4632 ir_type *func_irtype = get_ir_type(type);
4637 if (get_method_n_ress(func_irtype) > 0) {
4638 ir_type *res_type = get_method_res_type(func_irtype, 0);
4640 if (statement->value != NULL) {
4641 ir_node *node = expression_to_firm(statement->value);
4642 if (!is_compound_type(res_type)) {
4643 type_t *type = statement->value->base.type;
4644 ir_mode *mode = get_ir_mode_storage(type);
4645 node = create_conv(dbgi, node, mode);
4646 node = do_strict_conv(dbgi, node);
4651 if (is_compound_type(res_type)) {
4654 mode = get_type_mode(res_type);
4656 in[0] = new_Unknown(mode);
4660 /* build return_value for its side effects */
4661 if (statement->value != NULL) {
4662 expression_to_firm(statement->value);
4667 ir_node *store = get_store();
4668 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4670 ir_node *end_block = get_irg_end_block(current_ir_graph);
4671 add_immBlock_pred(end_block, ret);
4673 set_cur_block(NULL);
4676 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4678 if (get_cur_block() == NULL)
4681 return expression_to_firm(statement->expression);
4684 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4686 entity_t *entity = compound->scope.entities;
4687 for ( ; entity != NULL; entity = entity->base.next) {
4688 if (!is_declaration(entity))
4691 create_local_declaration(entity);
4694 ir_node *result = NULL;
4695 statement_t *statement = compound->statements;
4696 for ( ; statement != NULL; statement = statement->base.next) {
4697 if (statement->base.next == NULL
4698 && statement->kind == STATEMENT_EXPRESSION) {
4699 result = expression_statement_to_firm(
4700 &statement->expression);
4703 statement_to_firm(statement);
4709 static void create_global_variable(entity_t *entity)
4711 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4712 ir_visibility visibility = ir_visibility_default;
4713 ir_entity *irentity;
4714 assert(entity->kind == ENTITY_VARIABLE);
4716 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4717 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4718 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4719 case STORAGE_CLASS_NONE:
4720 visibility = ir_visibility_default;
4721 /* uninitialized globals get merged in C */
4722 if (entity->variable.initializer == NULL)
4723 linkage |= IR_LINKAGE_MERGE;
4725 case STORAGE_CLASS_TYPEDEF:
4726 case STORAGE_CLASS_AUTO:
4727 case STORAGE_CLASS_REGISTER:
4728 panic("invalid storage class for global var");
4731 ir_type *var_type = get_glob_type();
4732 if (entity->variable.thread_local) {
4733 var_type = get_tls_type();
4734 /* LINKAGE_MERGE not supported by current linkers */
4735 linkage &= ~IR_LINKAGE_MERGE;
4737 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4738 irentity = entity->variable.v.entity;
4739 add_entity_linkage(irentity, linkage);
4740 set_entity_visibility(irentity, visibility);
4743 static void create_local_declaration(entity_t *entity)
4745 assert(is_declaration(entity));
4747 /* construct type */
4748 (void) get_ir_type(entity->declaration.type);
4749 if (entity->base.symbol == NULL) {
4753 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4754 case STORAGE_CLASS_STATIC:
4755 if (entity->kind == ENTITY_FUNCTION) {
4756 (void)get_function_entity(entity, NULL);
4758 create_local_static_variable(entity);
4761 case STORAGE_CLASS_EXTERN:
4762 if (entity->kind == ENTITY_FUNCTION) {
4763 assert(entity->function.statement == NULL);
4764 (void)get_function_entity(entity, NULL);
4766 create_global_variable(entity);
4767 create_variable_initializer(entity);
4770 case STORAGE_CLASS_NONE:
4771 case STORAGE_CLASS_AUTO:
4772 case STORAGE_CLASS_REGISTER:
4773 if (entity->kind == ENTITY_FUNCTION) {
4774 if (entity->function.statement != NULL) {
4775 ir_type *owner = get_irg_frame_type(current_ir_graph);
4776 (void)get_function_entity(entity, owner);
4777 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4778 enqueue_inner_function(entity);
4780 (void)get_function_entity(entity, NULL);
4783 create_local_variable(entity);
4786 case STORAGE_CLASS_TYPEDEF:
4789 panic("invalid storage class found");
4792 static void initialize_local_declaration(entity_t *entity)
4794 if (entity->base.symbol == NULL)
4797 // no need to emit code in dead blocks
4798 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4799 && get_cur_block() == NULL)
4802 switch ((declaration_kind_t) entity->declaration.kind) {
4803 case DECLARATION_KIND_LOCAL_VARIABLE:
4804 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4805 create_variable_initializer(entity);
4808 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4809 allocate_variable_length_array(entity);
4812 case DECLARATION_KIND_COMPOUND_MEMBER:
4813 case DECLARATION_KIND_GLOBAL_VARIABLE:
4814 case DECLARATION_KIND_FUNCTION:
4815 case DECLARATION_KIND_INNER_FUNCTION:
4818 case DECLARATION_KIND_PARAMETER:
4819 case DECLARATION_KIND_PARAMETER_ENTITY:
4820 panic("can't initialize parameters");
4822 case DECLARATION_KIND_UNKNOWN:
4823 panic("can't initialize unknown declaration");
4825 panic("invalid declaration kind");
4828 static void declaration_statement_to_firm(declaration_statement_t *statement)
4830 entity_t *entity = statement->declarations_begin;
4834 entity_t *const last = statement->declarations_end;
4835 for ( ;; entity = entity->base.next) {
4836 if (is_declaration(entity)) {
4837 initialize_local_declaration(entity);
4838 } else if (entity->kind == ENTITY_TYPEDEF) {
4839 /* ยง6.7.7:3 Any array size expressions associated with variable length
4840 * array declarators are evaluated each time the declaration of the
4841 * typedef name is reached in the order of execution. */
4842 type_t *const type = skip_typeref(entity->typedefe.type);
4843 if (is_type_array(type) && type->array.is_vla)
4844 get_vla_size(&type->array);
4851 static void if_statement_to_firm(if_statement_t *statement)
4853 /* Create the condition. */
4854 ir_node *true_block = NULL;
4855 ir_node *false_block = NULL;
4856 if (get_cur_block() != NULL) {
4857 true_block = new_immBlock();
4858 false_block = new_immBlock();
4859 create_condition_evaluation(statement->condition, true_block, false_block);
4860 mature_immBlock(true_block);
4863 /* Create the false statement.
4864 * Hadle false before true, so if no false statement is present, then the
4865 * empty false block is reused as fallthrough block. */
4866 ir_node *fallthrough_block = NULL;
4867 if (statement->false_statement != NULL) {
4868 if (false_block != NULL) {
4869 mature_immBlock(false_block);
4871 set_cur_block(false_block);
4872 statement_to_firm(statement->false_statement);
4873 if (get_cur_block() != NULL) {
4874 fallthrough_block = new_immBlock();
4875 add_immBlock_pred(fallthrough_block, new_Jmp());
4878 fallthrough_block = false_block;
4881 /* Create the true statement. */
4882 set_cur_block(true_block);
4883 statement_to_firm(statement->true_statement);
4884 if (get_cur_block() != NULL) {
4885 if (fallthrough_block == NULL) {
4886 fallthrough_block = new_immBlock();
4888 add_immBlock_pred(fallthrough_block, new_Jmp());
4891 /* Handle the block after the if-statement. */
4892 if (fallthrough_block != NULL) {
4893 mature_immBlock(fallthrough_block);
4895 set_cur_block(fallthrough_block);
4898 /* Create a jump node which jumps into target_block, if the current block is
4900 static void jump_if_reachable(ir_node *const target_block)
4902 if (get_cur_block() != NULL) {
4903 add_immBlock_pred(target_block, new_Jmp());
4907 static void while_statement_to_firm(while_statement_t *statement)
4909 /* Create the header block */
4910 ir_node *const header_block = new_immBlock();
4911 jump_if_reachable(header_block);
4913 /* Create the condition. */
4914 ir_node * body_block;
4915 ir_node * false_block;
4916 expression_t *const cond = statement->condition;
4917 if (is_constant_expression(cond) && fold_constant_to_bool(cond)) {
4918 /* Shortcut for while (true). */
4919 body_block = header_block;
4922 keep_alive(header_block);
4923 keep_all_memory(header_block);
4925 body_block = new_immBlock();
4926 false_block = new_immBlock();
4928 set_cur_block(header_block);
4929 create_condition_evaluation(cond, body_block, false_block);
4930 mature_immBlock(body_block);
4933 ir_node *const old_continue_label = continue_label;
4934 ir_node *const old_break_label = break_label;
4935 continue_label = header_block;
4936 break_label = false_block;
4938 /* Create the loop body. */
4939 set_cur_block(body_block);
4940 statement_to_firm(statement->body);
4941 jump_if_reachable(header_block);
4943 mature_immBlock(header_block);
4944 assert(false_block == NULL || false_block == break_label);
4945 false_block = break_label;
4946 if (false_block != NULL) {
4947 mature_immBlock(false_block);
4949 set_cur_block(false_block);
4951 assert(continue_label == header_block);
4952 continue_label = old_continue_label;
4953 break_label = old_break_label;
4956 static ir_node *get_break_label(void)
4958 if (break_label == NULL) {
4959 break_label = new_immBlock();
4964 static void do_while_statement_to_firm(do_while_statement_t *statement)
4966 /* create the header block */
4967 ir_node *header_block = new_immBlock();
4970 ir_node *body_block = new_immBlock();
4971 jump_if_reachable(body_block);
4973 ir_node *old_continue_label = continue_label;
4974 ir_node *old_break_label = break_label;
4975 continue_label = header_block;
4978 set_cur_block(body_block);
4979 statement_to_firm(statement->body);
4980 ir_node *const false_block = get_break_label();
4982 assert(continue_label == header_block);
4983 continue_label = old_continue_label;
4984 break_label = old_break_label;
4986 jump_if_reachable(header_block);
4988 /* create the condition */
4989 mature_immBlock(header_block);
4990 set_cur_block(header_block);
4992 create_condition_evaluation(statement->condition, body_block, false_block);
4993 mature_immBlock(body_block);
4994 mature_immBlock(false_block);
4996 set_cur_block(false_block);
4999 static void for_statement_to_firm(for_statement_t *statement)
5001 /* create declarations */
5002 entity_t *entity = statement->scope.entities;
5003 for ( ; entity != NULL; entity = entity->base.next) {
5004 if (!is_declaration(entity))
5007 create_local_declaration(entity);
5010 if (get_cur_block() != NULL) {
5011 entity = statement->scope.entities;
5012 for ( ; entity != NULL; entity = entity->base.next) {
5013 if (!is_declaration(entity))
5016 initialize_local_declaration(entity);
5019 if (statement->initialisation != NULL) {
5020 expression_to_firm(statement->initialisation);
5024 /* Create the header block */
5025 ir_node *const header_block = new_immBlock();
5026 jump_if_reachable(header_block);
5028 /* Create the condition. */
5029 ir_node *body_block;
5030 ir_node *false_block;
5031 if (statement->condition != NULL) {
5032 body_block = new_immBlock();
5033 false_block = new_immBlock();
5035 set_cur_block(header_block);
5036 create_condition_evaluation(statement->condition, body_block, false_block);
5037 mature_immBlock(body_block);
5040 body_block = header_block;
5043 keep_alive(header_block);
5044 keep_all_memory(header_block);
5047 /* Create the step block, if necessary. */
5048 ir_node * step_block = header_block;
5049 expression_t *const step = statement->step;
5051 step_block = new_immBlock();
5054 ir_node *const old_continue_label = continue_label;
5055 ir_node *const old_break_label = break_label;
5056 continue_label = step_block;
5057 break_label = false_block;
5059 /* Create the loop body. */
5060 set_cur_block(body_block);
5061 statement_to_firm(statement->body);
5062 jump_if_reachable(step_block);
5064 /* Create the step code. */
5066 mature_immBlock(step_block);
5067 set_cur_block(step_block);
5068 expression_to_firm(step);
5069 jump_if_reachable(header_block);
5072 mature_immBlock(header_block);
5073 assert(false_block == NULL || false_block == break_label);
5074 false_block = break_label;
5075 if (false_block != NULL) {
5076 mature_immBlock(false_block);
5078 set_cur_block(false_block);
5080 assert(continue_label == step_block);
5081 continue_label = old_continue_label;
5082 break_label = old_break_label;
5085 static void create_jump_statement(const statement_t *statement,
5086 ir_node *target_block)
5088 if (get_cur_block() == NULL)
5091 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5092 ir_node *jump = new_d_Jmp(dbgi);
5093 add_immBlock_pred(target_block, jump);
5095 set_cur_block(NULL);
5098 static void switch_statement_to_firm(switch_statement_t *statement)
5100 ir_node *first_block = NULL;
5101 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5102 ir_node *cond = NULL;
5104 if (get_cur_block() != NULL) {
5105 ir_node *expression = expression_to_firm(statement->expression);
5106 cond = new_d_Cond(dbgi, expression);
5107 first_block = get_cur_block();
5110 set_cur_block(NULL);
5112 ir_node *const old_switch_cond = current_switch_cond;
5113 ir_node *const old_break_label = break_label;
5114 const bool old_saw_default_label = saw_default_label;
5115 saw_default_label = false;
5116 current_switch_cond = cond;
5118 switch_statement_t *const old_switch = current_switch;
5119 current_switch = statement;
5121 /* determine a free number for the default label */
5122 unsigned long num_cases = 0;
5123 long default_proj_nr = 0;
5124 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5125 if (l->expression == NULL) {
5129 if (l->last_case >= l->first_case)
5130 num_cases += l->last_case - l->first_case + 1;
5131 if (l->last_case > default_proj_nr)
5132 default_proj_nr = l->last_case;
5135 if (default_proj_nr == INT_MAX) {
5136 /* Bad: an overflow will occur, we cannot be sure that the
5137 * maximum + 1 is a free number. Scan the values a second
5138 * time to find a free number.
5140 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5142 memset(bits, 0, (num_cases + 7) >> 3);
5143 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5144 if (l->expression == NULL) {
5148 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5149 if (start < num_cases && l->last_case >= 0) {
5150 unsigned long end = (unsigned long)l->last_case < num_cases ?
5151 (unsigned long)l->last_case : num_cases - 1;
5152 for (unsigned long cns = start; cns <= end; ++cns) {
5153 bits[cns >> 3] |= (1 << (cns & 7));
5157 /* We look at the first num_cases constants:
5158 * Either they are dense, so we took the last (num_cases)
5159 * one, or they are not dense, so we will find one free
5163 for (i = 0; i < num_cases; ++i)
5164 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5168 default_proj_nr = i;
5172 statement->default_proj_nr = default_proj_nr;
5173 /* safety check: cond might already be folded to a Bad */
5174 if (cond != NULL && is_Cond(cond)) {
5175 set_Cond_default_proj(cond, default_proj_nr);
5178 statement_to_firm(statement->body);
5180 jump_if_reachable(get_break_label());
5182 if (!saw_default_label && first_block != NULL) {
5183 set_cur_block(first_block);
5184 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5185 add_immBlock_pred(get_break_label(), proj);
5188 if (break_label != NULL) {
5189 mature_immBlock(break_label);
5191 set_cur_block(break_label);
5193 assert(current_switch_cond == cond);
5194 current_switch = old_switch;
5195 current_switch_cond = old_switch_cond;
5196 break_label = old_break_label;
5197 saw_default_label = old_saw_default_label;
5200 static void case_label_to_firm(const case_label_statement_t *statement)
5202 if (statement->is_empty_range)
5205 ir_node *block = new_immBlock();
5206 /* Fallthrough from previous case */
5207 jump_if_reachable(block);
5209 if (current_switch_cond != NULL) {
5210 set_cur_block(get_nodes_block(current_switch_cond));
5211 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5212 if (statement->expression != NULL) {
5213 long pn = statement->first_case;
5214 long end_pn = statement->last_case;
5215 assert(pn <= end_pn);
5216 /* create jumps for all cases in the given range */
5218 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5219 add_immBlock_pred(block, proj);
5220 } while (pn++ < end_pn);
5222 saw_default_label = true;
5223 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5224 current_switch->default_proj_nr);
5225 add_immBlock_pred(block, proj);
5229 mature_immBlock(block);
5230 set_cur_block(block);
5232 statement_to_firm(statement->statement);
5235 static void label_to_firm(const label_statement_t *statement)
5237 ir_node *block = get_label_block(statement->label);
5238 jump_if_reachable(block);
5240 set_cur_block(block);
5242 keep_all_memory(block);
5244 statement_to_firm(statement->statement);
5247 static void goto_to_firm(const goto_statement_t *statement)
5249 if (get_cur_block() == NULL)
5252 if (statement->expression) {
5253 ir_node *irn = expression_to_firm(statement->expression);
5254 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5255 ir_node *ijmp = new_d_IJmp(dbgi, irn);
5257 set_irn_link(ijmp, ijmp_list);
5260 ir_node *block = get_label_block(statement->label);
5261 ir_node *jmp = new_Jmp();
5262 add_immBlock_pred(block, jmp);
5264 set_cur_block(NULL);
5267 static void asm_statement_to_firm(const asm_statement_t *statement)
5269 bool needs_memory = false;
5271 if (statement->is_volatile) {
5272 needs_memory = true;
5275 size_t n_clobbers = 0;
5276 asm_clobber_t *clobber = statement->clobbers;
5277 for ( ; clobber != NULL; clobber = clobber->next) {
5278 const char *clobber_str = clobber->clobber.begin;
5280 if (!be_is_valid_clobber(clobber_str)) {
5281 errorf(&statement->base.source_position,
5282 "invalid clobber '%s' specified", clobber->clobber);
5286 if (strcmp(clobber_str, "memory") == 0) {
5287 needs_memory = true;
5291 ident *id = new_id_from_str(clobber_str);
5292 obstack_ptr_grow(&asm_obst, id);
5295 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5296 ident **clobbers = NULL;
5297 if (n_clobbers > 0) {
5298 clobbers = obstack_finish(&asm_obst);
5301 size_t n_inputs = 0;
5302 asm_argument_t *argument = statement->inputs;
5303 for ( ; argument != NULL; argument = argument->next)
5305 size_t n_outputs = 0;
5306 argument = statement->outputs;
5307 for ( ; argument != NULL; argument = argument->next)
5310 unsigned next_pos = 0;
5312 ir_node *ins[n_inputs + n_outputs + 1];
5315 ir_asm_constraint tmp_in_constraints[n_outputs];
5317 const expression_t *out_exprs[n_outputs];
5318 ir_node *out_addrs[n_outputs];
5319 size_t out_size = 0;
5321 argument = statement->outputs;
5322 for ( ; argument != NULL; argument = argument->next) {
5323 const char *constraints = argument->constraints.begin;
5324 asm_constraint_flags_t asm_flags
5325 = be_parse_asm_constraints(constraints);
5327 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5328 warningf(&statement->base.source_position,
5329 "some constraints in '%s' are not supported", constraints);
5331 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5332 errorf(&statement->base.source_position,
5333 "some constraints in '%s' are invalid", constraints);
5336 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5337 errorf(&statement->base.source_position,
5338 "no write flag specified for output constraints '%s'",
5343 unsigned pos = next_pos++;
5344 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5345 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5346 expression_t *expr = argument->expression;
5347 ir_node *addr = expression_to_addr(expr);
5348 /* in+output, construct an artifical same_as constraint on the
5350 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5352 ir_node *value = get_value_from_lvalue(expr, addr);
5354 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5356 ir_asm_constraint constraint;
5357 constraint.pos = pos;
5358 constraint.constraint = new_id_from_str(buf);
5359 constraint.mode = get_ir_mode_storage(expr->base.type);
5360 tmp_in_constraints[in_size] = constraint;
5361 ins[in_size] = value;
5366 out_exprs[out_size] = expr;
5367 out_addrs[out_size] = addr;
5369 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5370 /* pure memory ops need no input (but we have to make sure we
5371 * attach to the memory) */
5372 assert(! (asm_flags &
5373 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5374 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5375 needs_memory = true;
5377 /* we need to attach the address to the inputs */
5378 expression_t *expr = argument->expression;
5380 ir_asm_constraint constraint;
5381 constraint.pos = pos;
5382 constraint.constraint = new_id_from_str(constraints);
5383 constraint.mode = NULL;
5384 tmp_in_constraints[in_size] = constraint;
5386 ins[in_size] = expression_to_addr(expr);
5390 errorf(&statement->base.source_position,
5391 "only modifiers but no place set in constraints '%s'",
5396 ir_asm_constraint constraint;
5397 constraint.pos = pos;
5398 constraint.constraint = new_id_from_str(constraints);
5399 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5401 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5403 assert(obstack_object_size(&asm_obst)
5404 == out_size * sizeof(ir_asm_constraint));
5405 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5408 obstack_grow(&asm_obst, tmp_in_constraints,
5409 in_size * sizeof(tmp_in_constraints[0]));
5410 /* find and count input and output arguments */
5411 argument = statement->inputs;
5412 for ( ; argument != NULL; argument = argument->next) {
5413 const char *constraints = argument->constraints.begin;
5414 asm_constraint_flags_t asm_flags
5415 = be_parse_asm_constraints(constraints);
5417 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5418 errorf(&statement->base.source_position,
5419 "some constraints in '%s' are not supported", constraints);
5422 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5423 errorf(&statement->base.source_position,
5424 "some constraints in '%s' are invalid", constraints);
5427 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5428 errorf(&statement->base.source_position,
5429 "write flag specified for input constraints '%s'",
5435 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5436 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5437 /* we can treat this as "normal" input */
5438 input = expression_to_firm(argument->expression);
5439 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5440 /* pure memory ops need no input (but we have to make sure we
5441 * attach to the memory) */
5442 assert(! (asm_flags &
5443 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5444 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5445 needs_memory = true;
5446 input = expression_to_addr(argument->expression);
5448 errorf(&statement->base.source_position,
5449 "only modifiers but no place set in constraints '%s'",
5454 ir_asm_constraint constraint;
5455 constraint.pos = next_pos++;
5456 constraint.constraint = new_id_from_str(constraints);
5457 constraint.mode = get_irn_mode(input);
5459 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5460 ins[in_size++] = input;
5464 ir_asm_constraint constraint;
5465 constraint.pos = next_pos++;
5466 constraint.constraint = new_id_from_str("");
5467 constraint.mode = mode_M;
5469 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5470 ins[in_size++] = get_store();
5473 assert(obstack_object_size(&asm_obst)
5474 == in_size * sizeof(ir_asm_constraint));
5475 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5477 /* create asm node */
5478 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5480 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5482 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5483 out_size, output_constraints,
5484 n_clobbers, clobbers, asm_text);
5486 if (statement->is_volatile) {
5487 set_irn_pinned(node, op_pin_state_pinned);
5489 set_irn_pinned(node, op_pin_state_floats);
5492 /* create output projs & connect them */
5494 ir_node *projm = new_Proj(node, mode_M, out_size);
5499 for (i = 0; i < out_size; ++i) {
5500 const expression_t *out_expr = out_exprs[i];
5502 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5503 ir_node *proj = new_Proj(node, mode, pn);
5504 ir_node *addr = out_addrs[i];
5506 set_value_for_expression_addr(out_expr, proj, addr);
5510 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5512 statement_to_firm(statement->try_statement);
5513 warningf(&statement->base.source_position, "structured exception handling ignored");
5516 static void leave_statement_to_firm(leave_statement_t *statement)
5518 errorf(&statement->base.source_position, "__leave not supported yet");
5522 * Transform a statement.
5524 static void statement_to_firm(statement_t *statement)
5527 assert(!statement->base.transformed);
5528 statement->base.transformed = true;
5531 switch (statement->kind) {
5532 case STATEMENT_INVALID:
5533 panic("invalid statement found");
5534 case STATEMENT_EMPTY:
5537 case STATEMENT_COMPOUND:
5538 compound_statement_to_firm(&statement->compound);
5540 case STATEMENT_RETURN:
5541 return_statement_to_firm(&statement->returns);
5543 case STATEMENT_EXPRESSION:
5544 expression_statement_to_firm(&statement->expression);
5547 if_statement_to_firm(&statement->ifs);
5549 case STATEMENT_WHILE:
5550 while_statement_to_firm(&statement->whiles);
5552 case STATEMENT_DO_WHILE:
5553 do_while_statement_to_firm(&statement->do_while);
5555 case STATEMENT_DECLARATION:
5556 declaration_statement_to_firm(&statement->declaration);
5558 case STATEMENT_BREAK:
5559 create_jump_statement(statement, get_break_label());
5561 case STATEMENT_CONTINUE:
5562 create_jump_statement(statement, continue_label);
5564 case STATEMENT_SWITCH:
5565 switch_statement_to_firm(&statement->switchs);
5567 case STATEMENT_CASE_LABEL:
5568 case_label_to_firm(&statement->case_label);
5571 for_statement_to_firm(&statement->fors);
5573 case STATEMENT_LABEL:
5574 label_to_firm(&statement->label);
5576 case STATEMENT_GOTO:
5577 goto_to_firm(&statement->gotos);
5580 asm_statement_to_firm(&statement->asms);
5582 case STATEMENT_MS_TRY:
5583 ms_try_statement_to_firm(&statement->ms_try);
5585 case STATEMENT_LEAVE:
5586 leave_statement_to_firm(&statement->leave);
5589 panic("statement not implemented");
5592 static int count_local_variables(const entity_t *entity,
5593 const entity_t *const last)
5596 entity_t const *const end = last != NULL ? last->base.next : NULL;
5597 for (; entity != end; entity = entity->base.next) {
5601 if (entity->kind == ENTITY_VARIABLE) {
5602 type = skip_typeref(entity->declaration.type);
5603 address_taken = entity->variable.address_taken;
5604 } else if (entity->kind == ENTITY_PARAMETER) {
5605 type = skip_typeref(entity->declaration.type);
5606 address_taken = entity->parameter.address_taken;
5611 if (!address_taken && is_type_scalar(type))
5617 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5619 int *const count = env;
5621 switch (stmt->kind) {
5622 case STATEMENT_DECLARATION: {
5623 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5624 *count += count_local_variables(decl_stmt->declarations_begin,
5625 decl_stmt->declarations_end);
5630 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5639 * Return the number of local (alias free) variables used by a function.
5641 static int get_function_n_local_vars(entity_t *entity)
5643 const function_t *function = &entity->function;
5646 /* count parameters */
5647 count += count_local_variables(function->parameters.entities, NULL);
5649 /* count local variables declared in body */
5650 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5655 * Build Firm code for the parameters of a function.
5657 static void initialize_function_parameters(entity_t *entity)
5659 assert(entity->kind == ENTITY_FUNCTION);
5660 ir_graph *irg = current_ir_graph;
5661 ir_node *args = get_irg_args(irg);
5662 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5663 int first_param_nr = 0;
5665 if (entity->function.need_closure) {
5666 /* add an extra parameter for the static link */
5667 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5672 entity_t *parameter = entity->function.parameters.entities;
5673 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5674 if (parameter->kind != ENTITY_PARAMETER)
5677 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5678 type_t *type = skip_typeref(parameter->declaration.type);
5680 bool needs_entity = parameter->parameter.address_taken;
5681 assert(!is_type_array(type));
5682 if (is_type_compound(type)) {
5683 needs_entity = true;
5687 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5688 ident *id = new_id_from_str(parameter->base.symbol->string);
5689 set_entity_ident(entity, id);
5691 parameter->declaration.kind
5692 = DECLARATION_KIND_PARAMETER_ENTITY;
5693 parameter->parameter.v.entity = entity;
5697 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5698 ir_mode *param_mode = get_type_mode(param_irtype);
5700 long pn = n + first_param_nr;
5701 ir_node *value = new_r_Proj(args, param_mode, pn);
5703 ir_mode *mode = get_ir_mode_storage(type);
5704 value = create_conv(NULL, value, mode);
5705 value = do_strict_conv(NULL, value);
5707 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5708 parameter->parameter.v.value_number = next_value_number_function;
5709 set_irg_loc_description(current_ir_graph, next_value_number_function,
5711 ++next_value_number_function;
5713 set_value(parameter->parameter.v.value_number, value);
5718 * Handle additional decl modifiers for IR-graphs
5720 * @param irg the IR-graph
5721 * @param dec_modifiers additional modifiers
5723 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5724 decl_modifiers_t decl_modifiers)
5726 if (decl_modifiers & DM_RETURNS_TWICE) {
5727 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5728 add_irg_additional_properties(irg, mtp_property_returns_twice);
5730 if (decl_modifiers & DM_NORETURN) {
5731 /* TRUE if the declaration includes the Microsoft
5732 __declspec(noreturn) specifier. */
5733 add_irg_additional_properties(irg, mtp_property_noreturn);
5735 if (decl_modifiers & DM_NOTHROW) {
5736 /* TRUE if the declaration includes the Microsoft
5737 __declspec(nothrow) specifier. */
5738 add_irg_additional_properties(irg, mtp_property_nothrow);
5740 if (decl_modifiers & DM_NAKED) {
5741 /* TRUE if the declaration includes the Microsoft
5742 __declspec(naked) specifier. */
5743 add_irg_additional_properties(irg, mtp_property_naked);
5745 if (decl_modifiers & DM_FORCEINLINE) {
5746 /* TRUE if the declaration includes the
5747 Microsoft __forceinline specifier. */
5748 set_irg_inline_property(irg, irg_inline_forced);
5750 if (decl_modifiers & DM_NOINLINE) {
5751 /* TRUE if the declaration includes the Microsoft
5752 __declspec(noinline) specifier. */
5753 set_irg_inline_property(irg, irg_inline_forbidden);
5757 static void add_function_pointer(ir_type *segment, ir_entity *method,
5758 const char *unique_template)
5760 ir_type *method_type = get_entity_type(method);
5761 ir_type *ptr_type = new_type_pointer(method_type);
5763 /* these entities don't really have a name but firm only allows
5765 * Note that we mustn't give these entities a name since for example
5766 * Mach-O doesn't allow them. */
5767 ident *ide = id_unique(unique_template);
5768 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5769 ir_graph *irg = get_const_code_irg();
5770 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5773 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5774 set_entity_compiler_generated(ptr, 1);
5775 set_entity_visibility(ptr, ir_visibility_private);
5776 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5777 set_atomic_ent_value(ptr, val);
5781 * Generate possible IJmp branches to a given label block.
5783 static void gen_ijmp_branches(ir_node *block)
5786 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5787 add_immBlock_pred(block, ijmp);
5792 * Create code for a function and all inner functions.
5794 * @param entity the function entity
5796 static void create_function(entity_t *entity)
5798 assert(entity->kind == ENTITY_FUNCTION);
5799 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5801 if (entity->function.statement == NULL)
5804 if (is_main(entity) && enable_main_collect2_hack) {
5805 prepare_main_collect2(entity);
5808 inner_functions = NULL;
5809 current_trampolines = NULL;
5811 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5812 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5813 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5815 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5816 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5817 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5820 current_function_entity = entity;
5821 current_function_name = NULL;
5822 current_funcsig = NULL;
5824 assert(all_labels == NULL);
5825 all_labels = NEW_ARR_F(label_t *, 0);
5828 int n_local_vars = get_function_n_local_vars(entity);
5829 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5830 current_ir_graph = irg;
5832 ir_graph *old_current_function = current_function;
5833 current_function = irg;
5835 set_irg_fp_model(irg, firm_opt.fp_model);
5836 tarval_enable_fp_ops(1);
5837 set_irn_dbg_info(get_irg_start_block(irg),
5838 get_entity_dbg_info(function_entity));
5840 ir_node *first_block = get_cur_block();
5842 /* set inline flags */
5843 if (entity->function.is_inline)
5844 set_irg_inline_property(irg, irg_inline_recomended);
5845 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5847 next_value_number_function = 0;
5848 initialize_function_parameters(entity);
5849 current_static_link = entity->function.static_link;
5851 statement_to_firm(entity->function.statement);
5853 ir_node *end_block = get_irg_end_block(irg);
5855 /* do we have a return statement yet? */
5856 if (get_cur_block() != NULL) {
5857 type_t *type = skip_typeref(entity->declaration.type);
5858 assert(is_type_function(type));
5859 const function_type_t *func_type = &type->function;
5860 const type_t *return_type
5861 = skip_typeref(func_type->return_type);
5864 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5865 ret = new_Return(get_store(), 0, NULL);
5868 if (is_type_scalar(return_type)) {
5869 mode = get_ir_mode_storage(func_type->return_type);
5875 /* ยง5.1.2.2.3 main implicitly returns 0 */
5876 if (is_main(entity)) {
5877 in[0] = new_Const(get_mode_null(mode));
5879 in[0] = new_Unknown(mode);
5881 ret = new_Return(get_store(), 1, in);
5883 add_immBlock_pred(end_block, ret);
5886 bool has_computed_gotos = false;
5887 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5888 label_t *label = all_labels[i];
5889 if (label->address_taken) {
5890 gen_ijmp_branches(label->block);
5891 has_computed_gotos = true;
5893 mature_immBlock(label->block);
5895 if (has_computed_gotos) {
5896 /* if we have computed goto's in the function, we cannot inline it */
5897 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5898 warningf(&entity->base.source_position,
5899 "function '%Y' can never be inlined because it contains a computed goto",
5900 entity->base.symbol);
5902 set_irg_inline_property(irg, irg_inline_forbidden);
5905 DEL_ARR_F(all_labels);
5908 mature_immBlock(first_block);
5909 mature_immBlock(end_block);
5911 irg_finalize_cons(irg);
5913 /* finalize the frame type */
5914 ir_type *frame_type = get_irg_frame_type(irg);
5915 int n = get_compound_n_members(frame_type);
5918 for (int i = 0; i < n; ++i) {
5919 ir_entity *entity = get_compound_member(frame_type, i);
5920 ir_type *entity_type = get_entity_type(entity);
5922 int align = get_type_alignment_bytes(entity_type);
5923 if (align > align_all)
5927 misalign = offset % align;
5929 offset += align - misalign;
5933 set_entity_offset(entity, offset);
5934 offset += get_type_size_bytes(entity_type);
5936 set_type_size_bytes(frame_type, offset);
5937 set_type_alignment_bytes(frame_type, align_all);
5939 irg_verify(irg, VERIFY_ENFORCE_SSA);
5940 current_function = old_current_function;
5942 if (current_trampolines != NULL) {
5943 DEL_ARR_F(current_trampolines);
5944 current_trampolines = NULL;
5947 /* create inner functions if any */
5948 entity_t **inner = inner_functions;
5949 if (inner != NULL) {
5950 ir_type *rem_outer_frame = current_outer_frame;
5951 current_outer_frame = get_irg_frame_type(current_ir_graph);
5952 ir_type *rem_outer_value_type = current_outer_value_type;
5953 current_outer_value_type = get_irg_value_param_type(current_ir_graph);
5954 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5955 create_function(inner[i]);
5959 current_outer_value_type = rem_outer_value_type;
5960 current_outer_frame = rem_outer_frame;
5964 static void scope_to_firm(scope_t *scope)
5966 /* first pass: create declarations */
5967 entity_t *entity = scope->entities;
5968 for ( ; entity != NULL; entity = entity->base.next) {
5969 if (entity->base.symbol == NULL)
5972 if (entity->kind == ENTITY_FUNCTION) {
5973 if (entity->function.btk != bk_none) {
5974 /* builtins have no representation */
5977 (void)get_function_entity(entity, NULL);
5978 } else if (entity->kind == ENTITY_VARIABLE) {
5979 create_global_variable(entity);
5980 } else if (entity->kind == ENTITY_NAMESPACE) {
5981 scope_to_firm(&entity->namespacee.members);
5985 /* second pass: create code/initializers */
5986 entity = scope->entities;
5987 for ( ; entity != NULL; entity = entity->base.next) {
5988 if (entity->base.symbol == NULL)
5991 if (entity->kind == ENTITY_FUNCTION) {
5992 if (entity->function.btk != bk_none) {
5993 /* builtins have no representation */
5996 create_function(entity);
5997 } else if (entity->kind == ENTITY_VARIABLE) {
5998 assert(entity->declaration.kind
5999 == DECLARATION_KIND_GLOBAL_VARIABLE);
6000 current_ir_graph = get_const_code_irg();
6001 create_variable_initializer(entity);
6006 void init_ast2firm(void)
6008 obstack_init(&asm_obst);
6009 init_atomic_modes();
6011 ir_set_debug_retrieve(dbg_retrieve);
6012 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6014 /* create idents for all known runtime functions */
6015 for (size_t i = 0; i < lengthof(rts_data); ++i) {
6016 rts_idents[i] = new_id_from_str(rts_data[i].name);
6019 entitymap_init(&entitymap);
6022 static void init_ir_types(void)
6024 static int ir_types_initialized = 0;
6025 if (ir_types_initialized)
6027 ir_types_initialized = 1;
6029 ir_type_int = get_ir_type(type_int);
6030 ir_type_char = get_ir_type(type_char);
6031 ir_type_const_char = get_ir_type(type_const_char);
6032 ir_type_wchar_t = get_ir_type(type_wchar_t);
6033 ir_type_void = get_ir_type(type_void);
6035 be_params = be_get_backend_param();
6036 mode_float_arithmetic = be_params->mode_float_arithmetic;
6038 stack_param_align = be_params->stack_param_align;
6041 void exit_ast2firm(void)
6043 entitymap_destroy(&entitymap);
6044 obstack_free(&asm_obst, NULL);
6047 static void global_asm_to_firm(statement_t *s)
6049 for (; s != NULL; s = s->base.next) {
6050 assert(s->kind == STATEMENT_ASM);
6052 char const *const text = s->asms.asm_text.begin;
6053 size_t size = s->asms.asm_text.size;
6055 /* skip the last \0 */
6056 if (text[size - 1] == '\0')
6059 ident *const id = new_id_from_chars(text, size);
6064 void translation_unit_to_firm(translation_unit_t *unit)
6066 /* initialize firm arithmetic */
6067 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6068 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6070 /* just to be sure */
6071 continue_label = NULL;
6073 current_switch_cond = NULL;
6074 current_translation_unit = unit;
6078 scope_to_firm(&unit->scope);
6079 global_asm_to_firm(unit->global_asm);
6081 current_ir_graph = NULL;
6082 current_translation_unit = NULL;