9 #include <libfirm/firm.h>
10 #include <libfirm/adt/obst.h>
14 #include "adt/error.h"
15 #include "adt/array.h"
20 #define MAGIC_DEFAULT_PN_NUMBER (long) -314159265
22 static ir_type *ir_type_const_char;
23 static ir_type *ir_type_void;
24 static ir_type *ir_type_int;
25 static ir_type *ir_type_void_ptr;
27 static type_t *type_const_char;
28 static type_t *type_void;
29 static type_t *type_int;
31 static int next_value_number_function;
32 static ir_node *continue_label;
33 static ir_node *break_label;
34 static ir_node *current_switch_cond;
35 static bool saw_default_label;
36 static ir_node **imature_blocks;
38 static const declaration_t *current_function_decl;
39 static ir_node *current_function_name;
41 typedef enum declaration_type_t {
42 DECLARATION_TYPE_UNKNOWN,
43 DECLARATION_TYPE_FUNCTION,
44 DECLARATION_TYPE_GLOBAL_VARIABLE,
45 DECLARATION_TYPE_LOCAL_VARIABLE,
46 DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
47 DECLARATION_TYPE_COMPOUND_MEMBER,
48 DECLARATION_TYPE_LABEL_BLOCK,
51 static ir_type *get_ir_type(type_t *type);
53 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
57 const declaration_t *declaration = & value_numbers[pos]->declaration;
59 print_warning_prefix(declaration->source_position);
60 fprintf(stderr, "variable '%s' might be used uninitialized\n",
61 declaration->symbol->string);
63 fprintf(stderr, "Some variable might be used uninitialized\n");
64 return new_r_Unknown(irg, mode);
67 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
69 const source_position_t *pos = (const source_position_t*) dbg;
72 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
76 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
78 const source_position_t *pos = (const source_position_t*) dbg;
83 return pos->input_name;
86 void init_ast2firm(void)
88 type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
89 type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
90 type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
92 ir_type_int = get_ir_type(type_int);
93 ir_type_const_char = get_ir_type(type_const_char);
94 ir_type_void = get_ir_type(type_int); /* we don't have a real void
96 ir_type_void_ptr = new_type_pointer(new_id_from_str("void_ptr"),
97 ir_type_void, mode_P_data);
99 type_void->firm_type = ir_type_void;
102 void exit_ast2firm(void)
106 static unsigned unique_id = 0;
108 static ident *unique_ident(const char *tag)
112 snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
114 return new_id_from_str(buf);
117 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
119 switch(atomic_type->atype) {
120 case ATOMIC_TYPE_SCHAR:
121 case ATOMIC_TYPE_CHAR:
123 case ATOMIC_TYPE_UCHAR:
125 case ATOMIC_TYPE_SHORT:
127 case ATOMIC_TYPE_USHORT:
129 case ATOMIC_TYPE_LONG:
130 case ATOMIC_TYPE_INT:
132 case ATOMIC_TYPE_ULONG:
133 case ATOMIC_TYPE_UINT:
135 case ATOMIC_TYPE_LONGLONG:
137 case ATOMIC_TYPE_ULONGLONG:
139 case ATOMIC_TYPE_FLOAT:
141 case ATOMIC_TYPE_DOUBLE:
143 case ATOMIC_TYPE_LONG_DOUBLE:
145 case ATOMIC_TYPE_BOOL:
147 #ifdef PROVIDE_COMPLEX
148 case ATOMIC_TYPE_FLOAT_COMPLEX:
149 case ATOMIC_TYPE_DOUBLE_COMPLEX:
150 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
151 panic("complex lowering not implemented yet");
153 case ATOMIC_TYPE_FLOAT_IMAGINARY:
154 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
155 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
156 panic("imaginary lowering not implemented yet");
159 case ATOMIC_TYPE_VOID:
160 /* firm has no real void... */
162 case ATOMIC_TYPE_INVALID:
165 panic("Encountered unknown atomic type");
169 static unsigned get_type_size(type_t *type);
171 static unsigned get_atomic_type_size(const atomic_type_t *type)
173 switch(type->atype) {
174 case ATOMIC_TYPE_CHAR:
175 case ATOMIC_TYPE_SCHAR:
176 case ATOMIC_TYPE_UCHAR:
179 case ATOMIC_TYPE_SHORT:
180 case ATOMIC_TYPE_USHORT:
183 case ATOMIC_TYPE_BOOL:
184 case ATOMIC_TYPE_INT:
185 case ATOMIC_TYPE_UINT:
186 case ATOMIC_TYPE_LONG:
187 case ATOMIC_TYPE_ULONG:
188 case ATOMIC_TYPE_FLOAT:
191 case ATOMIC_TYPE_LONGLONG:
192 case ATOMIC_TYPE_ULONGLONG:
193 case ATOMIC_TYPE_DOUBLE:
196 case ATOMIC_TYPE_LONG_DOUBLE:
199 case ATOMIC_TYPE_VOID:
202 case ATOMIC_TYPE_INVALID:
205 panic("Trying to determine size of invalid atomic type");
208 static unsigned get_compound_type_size(compound_type_t *type)
210 ir_type *irtype = get_ir_type(&type->type);
211 return get_type_size_bytes(irtype);
214 static unsigned get_array_type_size(array_type_t *type)
216 ir_type *irtype = get_ir_type(&type->type);
217 return get_type_size_bytes(irtype);
220 static unsigned get_type_size(type_t *type)
222 type = skip_typeref(type);
226 return get_atomic_type_size((const atomic_type_t*) type);
228 return get_mode_size_bytes(mode_Is);
229 case TYPE_COMPOUND_UNION:
230 case TYPE_COMPOUND_STRUCT:
231 return get_compound_type_size((compound_type_t*) type);
233 /* just a pointer to the function */
234 return get_mode_size_bytes(mode_P_code);
236 return get_mode_size_bytes(mode_P_data);
238 return get_array_type_size((array_type_t*) type);
245 panic("Trying to determine size of invalid type");
248 static unsigned count_parameters(const function_type_t *function_type)
252 function_parameter_t *parameter = function_type->parameters;
253 for ( ; parameter != NULL; parameter = parameter->next) {
263 static long fold_constant(const expression_t *expression);
265 static ir_type *create_atomic_type(const atomic_type_t *type)
267 ir_mode *mode = get_atomic_mode(type);
268 ident *id = get_mode_ident(mode);
269 ir_type *irtype = new_type_primitive(id, mode);
274 static ir_type *create_method_type(const function_type_t *function_type)
276 type_t *result_type = function_type->result_type;
278 ident *id = unique_ident("functiontype");
279 int n_parameters = count_parameters(function_type);
280 int n_results = result_type == type_void ? 0 : 1;
281 ir_type *irtype = new_type_method(id, n_parameters, n_results);
283 if(result_type != type_void) {
284 ir_type *restype = get_ir_type(result_type);
285 set_method_res_type(irtype, 0, restype);
288 function_parameter_t *parameter = function_type->parameters;
290 for( ; parameter != NULL; parameter = parameter->next) {
291 ir_type *p_irtype = get_ir_type(parameter->type);
292 set_method_param_type(irtype, n, p_irtype);
296 if(function_type->variadic || function_type->unspecified_parameters) {
297 set_method_variadicity(irtype, variadicity_variadic);
303 static ir_type *create_pointer_type(pointer_type_t *type)
305 type_t *points_to = type->points_to;
306 ir_type *ir_points_to;
307 /* Avoid endless recursion if the points_to type contains this poiner type
308 * again (might be a struct). We therefore first create a void* pointer
309 * and then set the real points_to type
311 ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
312 ir_type_void, mode_P_data);
313 type->type.firm_type = ir_type;
315 ir_points_to = get_ir_type(points_to);
316 set_pointer_points_to_type(ir_type, ir_points_to);
321 static ir_type *create_array_type(array_type_t *type)
323 type_t *element_type = type->element_type;
324 ir_type *ir_element_type = get_ir_type(element_type);
326 ident *id = unique_ident("array");
327 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
329 if(type->size != NULL) {
330 int n_elements = fold_constant(type->size);
332 set_array_bounds_int(ir_type, 0, 0, n_elements);
334 size_t elemsize = get_type_size_bytes(ir_element_type);
335 int align = get_type_alignment_bytes(ir_element_type);
336 if(elemsize % align > 0) {
337 elemsize += align - (elemsize % align);
339 set_type_size_bytes(ir_type, n_elements * elemsize);
340 set_type_alignment_bytes(ir_type, align);
341 set_type_state(ir_type, layout_fixed);
347 #define INVALID_TYPE ((ir_type_ptr)-1)
349 static ir_type *create_struct_type(compound_type_t *type)
351 symbol_t *symbol = type->declaration->symbol;
354 id = unique_ident(symbol->string);
356 id = unique_ident("__anonymous_struct");
358 ir_type *ir_type = new_type_struct(id);
360 type->type.firm_type = ir_type;
364 declaration_t *entry = type->declaration->context.declarations;
365 for( ; entry != NULL; entry = entry->next) {
366 if(entry->namespc != NAMESPACE_NORMAL)
369 ident *ident = new_id_from_str(entry->symbol->string);
370 ir_type_ptr entry_ir_type = get_ir_type(entry->type);
372 int entry_size = get_type_size_bytes(entry_ir_type);
373 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
374 int misalign = offset % entry_alignment;
376 offset += entry_alignment - misalign;
378 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
379 set_entity_offset(entity, offset);
380 add_struct_member(ir_type, entity);
381 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
382 entry->v.entity = entity;
384 offset += entry_size;
385 if(entry_alignment > align_all) {
386 if(entry_alignment % align_all != 0) {
387 panic("Uneven alignments not supported yet");
389 align_all = entry_alignment;
393 int misalign = offset % align_all;
395 set_type_alignment_bytes(ir_type, align_all);
396 set_type_size_bytes(ir_type, offset);
397 set_type_state(ir_type, layout_fixed);
402 static ir_type *create_union_type(compound_type_t *type)
404 declaration_t *declaration = type->declaration;
405 symbol_t *symbol = declaration->symbol;
408 id = unique_ident(symbol->string);
410 id = unique_ident("__anonymous_union");
412 ir_type *ir_type = new_type_union(id);
414 type->type.firm_type = ir_type;
418 declaration_t *entry = declaration->context.declarations;
419 for( ; entry != NULL; entry = entry->next) {
420 if(entry->namespc != NAMESPACE_NORMAL)
423 ident *ident = new_id_from_str(entry->symbol->string);
424 ir_type_ptr entry_ir_type = get_ir_type(entry->type);
426 int entry_size = get_type_size_bytes(entry_ir_type);
427 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
429 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
430 add_union_member(ir_type, entity);
431 set_entity_offset(entity, 0);
432 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
433 entry->v.entity = entity;
435 if(entry_size > size) {
438 if(entry_alignment > align_all) {
439 if(entry_alignment % align_all != 0) {
440 panic("Uneven alignments not supported yet");
442 align_all = entry_alignment;
446 set_type_alignment_bytes(ir_type, align_all);
447 set_type_size_bytes(ir_type, size);
448 set_type_state(ir_type, layout_fixed);
453 static ir_type *get_ir_type(type_t *type)
455 assert(type != NULL);
457 type = skip_typeref(type);
459 if(type->firm_type != NULL) {
460 assert(type->firm_type != INVALID_TYPE);
461 return type->firm_type;
464 ir_type *firm_type = NULL;
467 firm_type = create_atomic_type((atomic_type_t*) type);
470 firm_type = create_method_type((function_type_t*) type);
473 firm_type = create_pointer_type((pointer_type_t*) type);
476 firm_type = create_array_type((array_type_t*) type);
478 case TYPE_COMPOUND_STRUCT:
479 firm_type = create_struct_type((compound_type_t*) type);
481 case TYPE_COMPOUND_UNION:
482 firm_type = create_union_type((compound_type_t*) type);
485 firm_type = ir_type_int;
493 if(firm_type == NULL)
494 panic("unknown type found");
496 type->firm_type = firm_type;
500 static inline ir_mode *get_ir_mode(type_t *type)
502 ir_type *irtype = get_ir_type(type);
504 /* firm doesn't report a mode for arrays somehow... */
505 if(is_Array_type(irtype)) {
509 ir_mode *mode = get_type_mode(irtype);
510 assert(mode != NULL);
514 static ir_entity* get_function_entity(declaration_t *declaration)
516 if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
517 return declaration->v.entity;
518 assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
520 symbol_t *symbol = declaration->symbol;
521 ident *id = new_id_from_str(symbol->string);
523 ir_type *global_type = get_glob_type();
524 ir_type *ir_type_method = get_ir_type(declaration->type);
525 assert(is_Method_type(ir_type_method));
527 ir_entity *entity = new_entity(global_type, id, ir_type_method);
528 set_entity_ld_ident(entity, id);
529 if(declaration->storage_class == STORAGE_CLASS_STATIC
530 || declaration->is_inline) {
531 set_entity_visibility(entity, visibility_local);
532 } else if(declaration->init.statement != NULL) {
533 set_entity_visibility(entity, visibility_external_visible);
535 set_entity_visibility(entity, visibility_external_allocated);
538 declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
539 declaration->v.entity = entity;
546 static ir_node *expression_to_firm(const expression_t *expression);
548 static dbg_info *get_dbg_info(const source_position_t *pos)
550 return (dbg_info*) pos;
553 static ir_node *const_to_firm(const const_t *cnst)
555 dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
556 ir_mode *mode = get_ir_mode(cnst->expression.datatype);
561 if(mode_is_float(mode)) {
562 tv = new_tarval_from_double(cnst->v.float_value, mode);
564 if(mode_is_signed(mode)) {
565 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
567 len = snprintf(buf, sizeof(buf), "%llu", cnst->v.int_value);
569 tv = new_tarval_from_str(buf, len, mode);
572 return new_d_Const(dbgi, mode, tv);
575 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
577 assert(entity != NULL);
578 union symconst_symbol sym;
579 sym.entity_p = entity;
580 return new_d_SymConst(dbgi, sym, symconst_addr_ent);
583 static ir_node *string_to_firm(const source_position_t *const src_pos,
584 const char *const id_prefix,
585 const char *const string)
587 ir_type *const global_type = get_glob_type();
588 ir_type *const type = new_type_array(unique_ident("strtype"), 1,
591 ident *const id = unique_ident(id_prefix);
592 ir_entity *const entity = new_entity(global_type, id, type);
593 set_entity_ld_ident(entity, id);
594 set_entity_variability(entity, variability_constant);
596 ir_type *const elem_type = ir_type_const_char;
597 ir_mode *const mode = get_type_mode(elem_type);
599 const size_t slen = strlen(string) + 1;
601 set_array_lower_bound_int(type, 0, 0);
602 set_array_upper_bound_int(type, 0, slen);
603 set_type_size_bytes(type, slen);
604 set_type_state(type, layout_fixed);
606 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
607 for(size_t i = 0; i < slen; ++i) {
608 tvs[i] = new_tarval_from_long(string[i], mode);
611 set_array_entity_values(entity, tvs, slen);
614 dbg_info *const dbgi = get_dbg_info(src_pos);
616 return create_symconst(dbgi, entity);
619 static ir_node *string_literal_to_firm(const string_literal_t* literal)
621 return string_to_firm(&literal->expression.source_position, "Lstr",
625 static ir_node *deref_address(type_t *const type, ir_node *const addr,
626 dbg_info *const dbgi)
628 switch (type->type) {
630 case TYPE_COMPOUND_STRUCT:
631 case TYPE_COMPOUND_UNION:
635 ir_mode *const mode = get_ir_mode(type);
636 ir_node *const memory = get_store();
637 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
638 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
639 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
646 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
648 dbg_info *dbgi = get_dbg_info(&ref->expression.source_position);
649 declaration_t *declaration = ref->declaration;
650 type_t *type = skip_typeref(declaration->type);
652 switch((declaration_type_t) declaration->declaration_type) {
653 case DECLARATION_TYPE_UNKNOWN:
655 case DECLARATION_TYPE_LOCAL_VARIABLE: {
656 ir_mode *mode = get_ir_mode(type);
657 return get_value(declaration->v.value_number, mode);
659 case DECLARATION_TYPE_FUNCTION: {
660 return create_symconst(dbgi, declaration->v.entity);
662 case DECLARATION_TYPE_GLOBAL_VARIABLE: {
663 ir_entity *entity = declaration->v.entity;
664 ir_node *symconst = create_symconst(dbgi, entity);
665 return deref_address(type, symconst, dbgi);
667 case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
668 ir_entity *entity = declaration->v.entity;
669 ir_node *frame = get_irg_frame(current_ir_graph);
670 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
671 return deref_address(type, sel, dbgi);
674 case DECLARATION_TYPE_COMPOUND_MEMBER:
675 case DECLARATION_TYPE_LABEL_BLOCK:
676 panic("not implemented reference type");
679 panic("reference to declaration with unknown type found");
682 static ir_node *reference_addr(const reference_expression_t *ref)
684 dbg_info *dbgi = get_dbg_info(&ref->expression.source_position);
685 declaration_t *declaration = ref->declaration;
687 switch((declaration_type_t) declaration->declaration_type) {
688 case DECLARATION_TYPE_UNKNOWN:
690 case DECLARATION_TYPE_LOCAL_VARIABLE:
691 panic("local variable without entity has no address");
692 case DECLARATION_TYPE_FUNCTION: {
693 return create_symconst(dbgi, declaration->v.entity);
695 case DECLARATION_TYPE_GLOBAL_VARIABLE: {
696 ir_entity *entity = declaration->v.entity;
697 ir_node *symconst = create_symconst(dbgi, entity);
700 case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
701 ir_entity *entity = declaration->v.entity;
702 ir_node *frame = get_irg_frame(current_ir_graph);
703 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
707 case DECLARATION_TYPE_COMPOUND_MEMBER:
708 case DECLARATION_TYPE_LABEL_BLOCK:
709 panic("not implemented reference type");
712 panic("reference to declaration with unknown type found");
715 static ir_node *call_expression_to_firm(const call_expression_t *call)
717 assert(get_cur_block() != NULL);
719 expression_t *function = call->function;
720 ir_node *callee = expression_to_firm(function);
722 function_type_t *function_type;
723 if (function->datatype->type == TYPE_POINTER) {
724 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
725 assert(ptr_type->points_to->type == TYPE_FUNCTION);
726 function_type = (function_type_t*)ptr_type->points_to;
728 assert(function->datatype->type == TYPE_FUNCTION);
729 function_type = (function_type_t*)function->datatype;
732 int n_parameters = 0;
733 call_argument_t *argument = call->arguments;
734 for( ; argument != NULL; argument = argument->next) {
738 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
739 ir_type *new_method_type = NULL;
740 if(function_type->variadic || function_type->unspecified_parameters) {
741 /* we need to construct a new method type matching the call
743 int n_res = get_method_n_ress(ir_method_type);
744 new_method_type = new_type_method(unique_ident("calltype"),
745 n_parameters, n_res);
746 set_method_calling_convention(new_method_type,
747 get_method_calling_convention(ir_method_type));
748 set_method_additional_properties(new_method_type,
749 get_method_additional_properties(ir_method_type));
751 for(int i = 0; i < n_res; ++i) {
752 set_method_res_type(new_method_type, i,
753 get_method_res_type(ir_method_type, i));
756 ir_node *in[n_parameters];
758 argument = call->arguments;
760 for( ; argument != NULL; argument = argument->next) {
761 expression_t *expression = argument->expression;
762 ir_node *arg_node = expression_to_firm(expression);
765 if(new_method_type != NULL) {
766 ir_type *irtype = get_ir_type(expression->datatype);
767 set_method_param_type(new_method_type, n, irtype);
772 assert(n == n_parameters);
774 if(new_method_type != NULL)
775 ir_method_type = new_method_type;
777 dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
778 ir_node *store = get_store();
779 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
781 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
784 type_t *result_type = function_type->result_type;
785 ir_node *result = NULL;
786 if(result_type != type_void) {
787 ir_mode *mode = get_ir_mode(result_type);
788 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
789 result = new_d_Proj(dbgi, resproj, mode, 0);
795 static ir_node *expression_to_addr(const expression_t *expression);
796 static void create_condition_evaluation(const expression_t *expression,
798 ir_node *false_block);
800 static void set_value_for_expression(const expression_t *expression,
803 if(expression->type == EXPR_REFERENCE) {
804 reference_expression_t *ref = (reference_expression_t*) expression;
806 declaration_t *declaration = ref->declaration;
807 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
808 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
809 set_value(declaration->v.value_number, value);
814 dbg_info *dbgi = get_dbg_info(&expression->source_position);
815 ir_node *addr = expression_to_addr(expression);
816 assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
817 ir_node *memory = get_store();
818 ir_node *store = new_d_Store(dbgi, memory, addr, value);
819 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
820 set_store(store_mem);
823 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
825 ir_mode *value_mode = get_irn_mode(value);
827 if (value_mode == dest_mode || is_Bad(value))
830 if(dest_mode == mode_b) {
831 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
832 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
833 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
837 return new_d_Conv(dbgi, value, dest_mode);
840 static ir_node *create_incdec(const unary_expression_t *expression)
842 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
843 type_t *type = expression->expression.datatype;
844 ir_mode *mode = get_ir_mode(type);
845 expression_t *value = expression->value;
847 ir_node *value_node = expression_to_firm(value);
850 if(type->type == TYPE_POINTER) {
851 pointer_type_t *pointer_type = (pointer_type_t*) type;
852 unsigned elem_size = get_type_size(pointer_type->points_to);
853 offset = new_Const_long(mode_Is, elem_size);
855 assert(is_type_arithmetic(type));
856 offset = new_Const(mode, get_mode_one(mode));
860 switch(expression->type) {
861 case UNEXPR_POSTFIX_INCREMENT: {
862 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
863 set_value_for_expression(value, new_value);
866 case UNEXPR_POSTFIX_DECREMENT: {
867 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
868 set_value_for_expression(value, new_value);
871 case UNEXPR_PREFIX_INCREMENT: {
872 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
873 set_value_for_expression(value, new_value);
876 case UNEXPR_PREFIX_DECREMENT: {
877 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
878 set_value_for_expression(value, new_value);
882 panic("no incdec expr in create_incdec");
888 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
890 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
891 type_t *type = expression->expression.datatype;
893 if(expression->type == UNEXPR_TAKE_ADDRESS)
894 return expression_to_addr(expression->value);
896 const expression_t *value = expression->value;
897 ir_node *value_node = expression_to_firm(value);
899 switch(expression->type) {
901 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
904 case UNEXPR_BITWISE_NEGATE:
905 return new_d_Not(dbgi, value_node, get_ir_mode(type));
907 if(get_irn_mode(value_node) != mode_b) {
908 value_node = create_conv(dbgi, value_node, mode_b);
910 value_node = new_d_Not(dbgi, value_node, mode_b);
911 ir_mode *const mode = get_ir_mode(type);
913 value_node = create_conv(dbgi, value_node, mode);
917 case UNEXPR_DEREFERENCE:
918 return deref_address(type, value_node, dbgi);
919 case UNEXPR_POSTFIX_INCREMENT:
920 case UNEXPR_POSTFIX_DECREMENT:
921 case UNEXPR_PREFIX_INCREMENT:
922 case UNEXPR_PREFIX_DECREMENT:
923 return create_incdec(expression);
925 return create_conv(dbgi, value_node, get_ir_mode(type));
927 case UNEXPR_TAKE_ADDRESS:
931 panic("invalid UNEXPR type found");
934 static long get_pnc(binary_expression_type_t type)
937 case BINEXPR_EQUAL: return pn_Cmp_Eq;
938 case BINEXPR_NOTEQUAL: return pn_Cmp_Lg;
939 case BINEXPR_LESS: return pn_Cmp_Lt;
940 case BINEXPR_LESSEQUAL: return pn_Cmp_Le;
941 case BINEXPR_GREATER: return pn_Cmp_Gt;
942 case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
946 panic("trying to get pn_Cmp from non-comparison binexpr type");
949 static ir_node *create_lazy_op(const binary_expression_t *expression)
951 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
952 type_t *type = expression->expression.datatype;
953 ir_mode *mode = get_ir_mode(type);
955 ir_node *cur_block = get_cur_block();
957 ir_node *one_block = new_immBlock();
958 ir_node *one = new_Const(mode, get_mode_one(mode));
959 ir_node *jmp_one = new_d_Jmp(dbgi);
961 ir_node *zero_block = new_immBlock();
962 ir_node *zero = new_Const(mode, get_mode_null(mode));
963 ir_node *jmp_zero = new_d_Jmp(dbgi);
965 set_cur_block(cur_block);
966 create_condition_evaluation((const expression_t*) expression,
967 one_block, zero_block);
968 mature_immBlock(one_block);
969 mature_immBlock(zero_block);
971 ir_node *common_block = new_immBlock();
972 add_immBlock_pred(common_block, jmp_one);
973 add_immBlock_pred(common_block, jmp_zero);
974 mature_immBlock(common_block);
976 ir_node *in[2] = { one, zero };
977 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
982 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
983 ir_node *right, ir_mode *mode);
985 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
986 create_arithmetic_func func)
988 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
989 ir_node *left = expression_to_firm(expression->left);
990 ir_node *right = expression_to_firm(expression->right);
991 type_t *type = expression->right->datatype;
992 /* be careful with the modes, because in arithmetic assign nodes only
993 * the right operand has the mode of the arithmetic already */
994 ir_mode *mode = get_ir_mode(type);
995 left = create_conv(dbgi, left, mode);
996 ir_node *res = func(dbgi, left, right, mode);
1001 static ir_node *pointer_arithmetic(ir_node *const pointer,
1004 dbg_info *const dbgi,
1005 const create_arithmetic_func func)
1007 pointer_type_t *const pointer_type = (pointer_type_t*)type;
1008 type_t *const points_to = pointer_type->points_to;
1009 const unsigned elem_size = get_type_size(points_to);
1011 assert(elem_size >= 1);
1012 if (elem_size > 1) {
1013 integer = create_conv(dbgi, integer, mode_Is);
1014 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1015 ir_node *const mul = new_d_Mul(dbgi, integer, cnst, mode_Is);
1019 ir_mode *const mode = get_ir_mode(type);
1020 return func(dbgi, pointer, integer, mode);
1023 static ir_node *create_arithmetic_assign_binop(
1024 const binary_expression_t *expression, create_arithmetic_func func)
1026 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1027 type_t *const type = expression->expression.datatype;
1030 if (type->type == TYPE_POINTER) {
1031 ir_node *const pointer = expression_to_firm(expression->left);
1032 ir_node * integer = expression_to_firm(expression->right);
1033 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1035 value = create_arithmetic_binop(expression, func);
1038 ir_mode *const mode = get_ir_mode(type);
1039 value = create_conv(dbgi, value, mode);
1040 set_value_for_expression(expression->left, value);
1045 static ir_node *create_add(const binary_expression_t *expression)
1047 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1048 ir_node *left = expression_to_firm(expression->left);
1049 ir_node *right = expression_to_firm(expression->right);
1050 type_t *type = expression->expression.datatype;
1052 expression_t *expr_left = expression->left;
1053 expression_t *expr_right = expression->right;
1054 type_t *type_left = skip_typeref(expr_left->datatype);
1055 type_t *type_right = skip_typeref(expr_right->datatype);
1057 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1058 ir_mode *const mode = get_ir_mode(type);
1059 return new_d_Add(dbgi, left, right, mode);
1062 if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1063 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1065 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1066 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1070 static ir_node *create_sub(const binary_expression_t *expression)
1072 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1073 expression_t *const expr_left = expression->left;
1074 expression_t *const expr_right = expression->right;
1075 ir_node *const left = expression_to_firm(expr_left);
1076 ir_node *const right = expression_to_firm(expr_right);
1077 type_t *const type = expression->expression.datatype;
1078 type_t *const type_left = skip_typeref(expr_left->datatype);
1079 type_t *const type_right = skip_typeref(expr_right->datatype);
1081 if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1082 ir_mode *const mode = get_ir_mode(type);
1083 return new_d_Sub(dbgi, left, right, mode);
1084 } else if (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER) {
1085 const pointer_type_t *const ptr_type = (const pointer_type_t*)type_left;
1086 const unsigned elem_size = get_type_size(ptr_type->points_to);
1087 ir_mode *const mode = get_ir_mode(type);
1088 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
1089 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1090 ir_node *const no_mem = new_NoMem();
1091 ir_node *const div = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1092 op_pin_state_floats);
1093 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1096 assert(type_left->type == TYPE_POINTER);
1097 return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1100 static ir_node *create_shift(const binary_expression_t *expression)
1102 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1103 ir_node *left = expression_to_firm(expression->left);
1104 ir_node *right = expression_to_firm(expression->right);
1105 type_t *type = expression->expression.datatype;
1106 ir_mode *mode = get_ir_mode(type);
1108 /* firm always wants the shift count to be unsigned */
1109 right = create_conv(dbgi, right, mode_Iu);
1113 switch(expression->type) {
1114 case BINEXPR_SHIFTLEFT:
1115 res = new_d_Shl(dbgi, left, right, mode);
1117 case BINEXPR_SHIFTRIGHT: {
1118 expression_t *expr_left = expression->left;
1119 type_t *type_left = skip_typeref(expr_left->datatype);
1121 if(is_type_signed(type_left)) {
1122 res = new_d_Shrs(dbgi, left, right, mode);
1124 res = new_d_Shr(dbgi, left, right, mode);
1129 panic("create shift op called for non-shift op");
1136 static ir_node *create_divmod(const binary_expression_t *expression)
1138 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1139 ir_node *left = expression_to_firm(expression->left);
1140 ir_node *right = expression_to_firm(expression->right);
1141 ir_node *pin = new_Pin(new_NoMem());
1142 type_t *type = expression->expression.datatype;
1143 ir_mode *mode = get_ir_mode(type);
1147 switch (expression->type) {
1149 case BINEXPR_DIV_ASSIGN:
1150 if(mode_is_float(mode)) {
1151 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1152 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1154 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1155 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1160 case BINEXPR_MOD_ASSIGN:
1161 assert(!mode_is_float(mode));
1162 op = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1163 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1166 default: panic("unexpected binary expression type in create_divmod()");
1172 static ir_node *create_arithmetic_assign_divmod(
1173 const binary_expression_t *expression)
1175 ir_node * value = create_divmod(expression);
1176 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1177 type_t *const type = expression->expression.datatype;
1178 ir_mode *const mode = get_ir_mode(type);
1180 assert(type->type != TYPE_POINTER);
1182 value = create_conv(dbgi, value, mode);
1183 set_value_for_expression(expression->left, value);
1189 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1191 binary_expression_type_t type = expression->type;
1194 case BINEXPR_NOTEQUAL:
1196 case BINEXPR_LESSEQUAL:
1197 case BINEXPR_GREATER:
1198 case BINEXPR_GREATEREQUAL: {
1199 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1200 ir_node *left = expression_to_firm(expression->left);
1201 ir_node *right = expression_to_firm(expression->right);
1202 ir_node *cmp = new_d_Cmp(dbgi, left, right);
1203 long pnc = get_pnc(type);
1204 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
1207 case BINEXPR_ASSIGN: {
1208 ir_node *right = expression_to_firm(expression->right);
1209 set_value_for_expression(expression->left, right);
1213 return create_add(expression);
1215 return create_sub(expression);
1217 return create_arithmetic_binop(expression, new_d_Mul);
1218 case BINEXPR_BITWISE_AND:
1219 return create_arithmetic_binop(expression, new_d_And);
1220 case BINEXPR_BITWISE_OR:
1221 return create_arithmetic_binop(expression, new_d_Or);
1222 case BINEXPR_BITWISE_XOR:
1223 return create_arithmetic_binop(expression, new_d_Eor);
1224 case BINEXPR_SHIFTLEFT:
1225 case BINEXPR_SHIFTRIGHT:
1226 return create_shift(expression);
1229 return create_divmod(expression);
1230 case BINEXPR_LOGICAL_AND:
1231 case BINEXPR_LOGICAL_OR:
1232 return create_lazy_op(expression);
1234 expression_to_firm(expression->left);
1235 return expression_to_firm(expression->right);
1236 case BINEXPR_ADD_ASSIGN:
1237 return create_arithmetic_assign_binop(expression, new_d_Add);
1238 case BINEXPR_SUB_ASSIGN:
1239 return create_arithmetic_assign_binop(expression, new_d_Sub);
1240 case BINEXPR_MUL_ASSIGN:
1241 return create_arithmetic_assign_binop(expression, new_d_Mul);
1242 case BINEXPR_DIV_ASSIGN:
1243 return create_arithmetic_assign_divmod(expression);
1244 case BINEXPR_BITWISE_AND_ASSIGN:
1245 return create_arithmetic_assign_binop(expression, new_d_And);
1246 case BINEXPR_BITWISE_OR_ASSIGN:
1247 return create_arithmetic_assign_binop(expression, new_d_Or);
1248 case BINEXPR_BITWISE_XOR_ASSIGN:
1249 return create_arithmetic_assign_binop(expression, new_d_Eor);
1250 case BINEXPR_SHIFTLEFT_ASSIGN:
1251 return create_arithmetic_assign_binop(expression, new_d_Shl);
1252 case BINEXPR_SHIFTRIGHT_ASSIGN:
1253 return create_arithmetic_assign_binop(expression, new_d_Shr);
1255 panic("TODO binexpr type");
1259 static ir_node *array_access_addr(const array_access_expression_t *expression)
1261 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1263 ir_node *base_addr = expression_to_firm(expression->array_ref);
1264 ir_node *offset = expression_to_firm(expression->index);
1265 offset = create_conv(dbgi, offset, mode_Iu);
1267 unsigned elem_size = get_type_size(expression->expression.datatype);
1268 ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1269 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
1271 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1276 static ir_node *array_access_to_firm(
1277 const array_access_expression_t *expression)
1279 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1280 ir_node *addr = array_access_addr(expression);
1281 type_t *type = skip_typeref(expression->expression.datatype);
1282 return deref_address(type, addr, dbgi);
1285 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1287 type_t *type = expression->type;
1289 type = expression->size_expression->datatype;
1290 assert(type != NULL);
1293 ir_mode *mode = get_ir_mode(expression->expression.datatype);
1294 unsigned size = get_type_size(type);
1295 ir_node *size_node = new_Const_long(mode, size);
1300 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1302 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1304 ir_node *cur_block = get_cur_block();
1306 /* create the true block */
1307 ir_node *true_block = new_immBlock();
1309 ir_node *true_val = expression_to_firm(expression->true_expression);
1310 ir_node *true_jmp = new_Jmp();
1312 /* create the false block */
1313 ir_node *false_block = new_immBlock();
1315 ir_node *false_val = expression_to_firm(expression->false_expression);
1316 ir_node *false_jmp = new_Jmp();
1318 /* create the condition evaluation */
1319 set_cur_block(cur_block);
1320 create_condition_evaluation(expression->condition, true_block, false_block);
1321 mature_immBlock(true_block);
1322 mature_immBlock(false_block);
1324 /* create the common block */
1325 ir_node *common_block = new_immBlock();
1326 add_immBlock_pred(common_block, true_jmp);
1327 add_immBlock_pred(common_block, false_jmp);
1328 mature_immBlock(common_block);
1330 /* TODO improve static semantics, so either both or no values are NULL */
1331 if (true_val == NULL || false_val == NULL) return NULL;
1333 ir_node *in[2] = { true_val, false_val };
1334 ir_mode *mode = get_irn_mode(true_val);
1335 assert(get_irn_mode(false_val) == mode);
1336 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
1341 static ir_node *select_addr(const select_expression_t *expression)
1343 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1345 ir_node *compound_addr = expression_to_firm(expression->compound);
1347 declaration_t *entry = expression->compound_entry;
1348 assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1349 ir_entity *entity = entry->v.entity;
1351 assert(entity != NULL);
1353 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1358 static ir_node *select_to_firm(const select_expression_t *expression)
1360 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1361 ir_node *addr = select_addr(expression);
1362 type_t *type = skip_typeref(expression->expression.datatype);
1363 return deref_address(type, addr, dbgi);
1366 /* Values returned by __builtin_classify_type. */
1367 typedef enum gcc_type_class
1373 enumeral_type_class,
1376 reference_type_class,
1380 function_type_class,
1391 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1393 const type_t *const type = expr->type_expression->datatype;
1399 const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1400 switch (atomic_type->atype) {
1401 // should not be reached
1402 case ATOMIC_TYPE_INVALID:
1406 // gcc cannot do that
1407 case ATOMIC_TYPE_VOID:
1408 tc = void_type_class;
1411 case ATOMIC_TYPE_CHAR: // gcc handles this as integer
1412 case ATOMIC_TYPE_SCHAR: // gcc handles this as integer
1413 case ATOMIC_TYPE_UCHAR: // gcc handles this as integer
1414 case ATOMIC_TYPE_SHORT:
1415 case ATOMIC_TYPE_USHORT:
1416 case ATOMIC_TYPE_INT:
1417 case ATOMIC_TYPE_UINT:
1418 case ATOMIC_TYPE_LONG:
1419 case ATOMIC_TYPE_ULONG:
1420 case ATOMIC_TYPE_LONGLONG:
1421 case ATOMIC_TYPE_ULONGLONG:
1422 case ATOMIC_TYPE_BOOL: // gcc handles this as integer
1423 tc = integer_type_class;
1426 case ATOMIC_TYPE_FLOAT:
1427 case ATOMIC_TYPE_DOUBLE:
1428 case ATOMIC_TYPE_LONG_DOUBLE:
1429 tc = real_type_class;
1432 #ifdef PROVIDE_COMPLEX
1433 case ATOMIC_TYPE_FLOAT_COMPLEX:
1434 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1435 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1436 tc = complex_type_class;
1438 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1439 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1440 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1441 tc = complex_type_class;
1446 panic("Unimplemented case in classify_type_to_firm().");
1451 case TYPE_ARRAY: // gcc handles this as pointer
1452 case TYPE_FUNCTION: // gcc handles this as pointer
1453 case TYPE_POINTER: tc = pointer_type_class; break;
1454 case TYPE_COMPOUND_STRUCT: tc = record_type_class; break;
1455 case TYPE_COMPOUND_UNION: tc = union_type_class; break;
1457 // gcc handles this as integer
1458 case TYPE_ENUM: tc = integer_type_class; break;
1461 panic("Unimplemented case in classify_type_to_firm().");
1464 dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1465 ir_mode *const mode = mode_Is;
1466 tarval *const tv = new_tarval_from_long(tc, mode);
1467 return new_d_Const(dbgi, mode, tv);
1470 static ir_node *function_name_to_firm(const string_literal_t *const expr)
1472 if (current_function_name == NULL) {
1473 const source_position_t *const src_pos =
1474 &expr->expression.source_position;
1475 const char *const name = current_function_decl->symbol->string;
1476 current_function_name = string_to_firm(src_pos, "__func__", name);
1479 return current_function_name;
1482 static ir_node *dereference_addr(const unary_expression_t *const expression)
1484 assert(expression->type == UNEXPR_DEREFERENCE);
1485 return expression_to_firm(expression->value);
1488 static ir_node *expression_to_addr(const expression_t *expression)
1490 switch(expression->type) {
1491 case EXPR_REFERENCE:
1492 return reference_addr((const reference_expression_t*) expression);
1493 case EXPR_ARRAY_ACCESS:
1494 return array_access_addr((const array_access_expression_t*) expression);
1496 return select_addr((const select_expression_t*) expression);
1498 const unary_expression_t *const unary_expr =
1499 (const unary_expression_t*)expression;
1500 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1501 return dereference_addr(unary_expr);
1508 panic("trying to get address of non-lvalue");
1511 static ir_node *_expression_to_firm(const expression_t *expression)
1513 switch(expression->type) {
1515 return const_to_firm((const const_t*) expression);
1516 case EXPR_STRING_LITERAL:
1517 return string_literal_to_firm((const string_literal_t*) expression);
1518 case EXPR_REFERENCE:
1519 return reference_expression_to_firm(
1520 (const reference_expression_t*) expression);
1522 return call_expression_to_firm((const call_expression_t*) expression);
1524 return unary_expression_to_firm((const unary_expression_t*) expression);
1526 return binary_expression_to_firm(
1527 (const binary_expression_t*) expression);
1528 case EXPR_ARRAY_ACCESS:
1529 return array_access_to_firm(
1530 (const array_access_expression_t*) expression);
1532 return sizeof_to_firm((const sizeof_expression_t*) expression);
1533 case EXPR_CONDITIONAL:
1534 return conditional_to_firm((const conditional_expression_t*)expression);
1536 return select_to_firm((const select_expression_t*) expression);
1537 case EXPR_CLASSIFY_TYPE:
1538 return classify_type_to_firm((const classify_type_expression_t*)expression);
1540 case EXPR_PRETTY_FUNCTION:
1541 return function_name_to_firm((const string_literal_t*)expression);
1544 case EXPR_STATEMENT:
1545 case EXPR_BUILTIN_SYMBOL:
1546 panic("unimplemented expression found");
1552 panic("invalid expression found");
1555 static ir_node *expression_to_firm(const expression_t *expression)
1557 ir_node *res = _expression_to_firm(expression);
1559 if(res != NULL && get_irn_mode(res) == mode_b) {
1560 ir_mode *mode = get_ir_mode(expression->datatype);
1561 res = create_conv(NULL, res, mode);
1567 static ir_node *expression_to_modeb(const expression_t *expression)
1569 ir_node *res = _expression_to_firm(expression);
1570 res = create_conv(NULL, res, mode_b);
1576 * create a short-circuit expression evaluation that tries to construct
1577 * efficient control flow structures for &&, || and ! expressions
1579 static void create_condition_evaluation(const expression_t *expression,
1580 ir_node *true_block,
1581 ir_node *false_block)
1583 switch(expression->type) {
1585 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1586 if(unary_expression->type == UNEXPR_NOT) {
1587 create_condition_evaluation(unary_expression->value, false_block,
1594 binary_expression_t *binary_expression
1595 = (binary_expression_t*) expression;
1596 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1597 ir_node *cur_block = get_cur_block();
1598 ir_node *extra_block = new_immBlock();
1599 set_cur_block(cur_block);
1600 create_condition_evaluation(binary_expression->left, extra_block,
1602 mature_immBlock(extra_block);
1603 set_cur_block(extra_block);
1604 create_condition_evaluation(binary_expression->right, true_block,
1608 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1609 ir_node *cur_block = get_cur_block();
1610 ir_node *extra_block = new_immBlock();
1611 set_cur_block(cur_block);
1612 create_condition_evaluation(binary_expression->left, true_block,
1614 mature_immBlock(extra_block);
1615 set_cur_block(extra_block);
1616 create_condition_evaluation(binary_expression->right, true_block,
1626 dbg_info *dbgi = get_dbg_info(&expression->source_position);
1627 ir_node *condition = expression_to_modeb(expression);
1628 ir_node *cond = new_d_Cond(dbgi, condition);
1629 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1630 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1632 add_immBlock_pred(true_block, true_proj);
1633 add_immBlock_pred(false_block, false_proj);
1635 set_cur_block(NULL);
1638 static void statement_to_firm(statement_t *statement);
1640 static void return_statement_to_firm(return_statement_t *statement)
1642 if(get_cur_block() == NULL)
1645 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1648 if(statement->return_value != NULL) {
1649 ir_node *retval = expression_to_firm(statement->return_value);
1653 ret = new_d_Return(dbgi, get_store(), 1, in);
1655 ret = new_d_Return(dbgi, get_store(), 0, NULL);
1657 ir_node *end_block = get_irg_end_block(current_ir_graph);
1658 add_immBlock_pred(end_block, ret);
1660 set_cur_block(NULL);
1663 static void compound_statement_to_firm(compound_statement_t *compound)
1665 statement_t *statement = compound->statements;
1666 for( ; statement != NULL; statement = statement->next) {
1667 //context2firm(&statement->context);
1668 statement_to_firm(statement);
1672 static void expression_statement_to_firm(expression_statement_t *statement)
1674 if(get_cur_block() == NULL)
1677 expression_to_firm(statement->expression);
1680 static void if_statement_to_firm(if_statement_t *statement)
1682 ir_node *cur_block = get_cur_block();
1684 ir_node *fallthrough_block = new_immBlock();
1686 /* the true (blocks) */
1687 ir_node *true_block;
1688 if (statement->true_statement != NULL) {
1689 true_block = new_immBlock();
1690 statement_to_firm(statement->true_statement);
1691 if(get_cur_block() != NULL) {
1692 ir_node *jmp = new_Jmp();
1693 add_immBlock_pred(fallthrough_block, jmp);
1696 true_block = fallthrough_block;
1699 /* the false (blocks) */
1700 ir_node *false_block;
1701 if(statement->false_statement != NULL) {
1702 false_block = new_immBlock();
1704 statement_to_firm(statement->false_statement);
1705 if(get_cur_block() != NULL) {
1706 ir_node *jmp = new_Jmp();
1707 add_immBlock_pred(fallthrough_block, jmp);
1710 false_block = fallthrough_block;
1713 /* create the condition */
1714 if(cur_block != NULL) {
1715 set_cur_block(cur_block);
1716 create_condition_evaluation(statement->condition, true_block,
1720 mature_immBlock(true_block);
1721 if(false_block != fallthrough_block) {
1722 mature_immBlock(false_block);
1724 mature_immBlock(fallthrough_block);
1726 set_cur_block(fallthrough_block);
1729 static void while_statement_to_firm(while_statement_t *statement)
1731 ir_node *jmp = NULL;
1732 if(get_cur_block() != NULL) {
1736 /* create the header block */
1737 ir_node *header_block = new_immBlock();
1739 add_immBlock_pred(header_block, jmp);
1742 /* the false block */
1743 ir_node *false_block = new_immBlock();
1746 ir_node *body_block;
1747 if (statement->body != NULL) {
1748 ir_node *old_continue_label = continue_label;
1749 ir_node *old_break_label = break_label;
1750 continue_label = header_block;
1751 break_label = false_block;
1753 body_block = new_immBlock();
1754 statement_to_firm(statement->body);
1756 assert(continue_label == header_block);
1757 assert(break_label == false_block);
1758 continue_label = old_continue_label;
1759 break_label = old_break_label;
1761 if(get_cur_block() != NULL) {
1762 ir_node *jmp = new_Jmp();
1763 add_immBlock_pred(header_block, jmp);
1766 body_block = header_block;
1769 /* create the condition */
1770 set_cur_block(header_block);
1772 create_condition_evaluation(statement->condition, body_block, false_block);
1773 mature_immBlock(body_block);
1774 mature_immBlock(false_block);
1775 mature_immBlock(header_block);
1777 set_cur_block(false_block);
1780 static void do_while_statement_to_firm(do_while_statement_t *statement)
1782 ir_node *jmp = NULL;
1783 if(get_cur_block() != NULL) {
1787 /* create the header block */
1788 ir_node *header_block = new_immBlock();
1790 /* the false block */
1791 ir_node *false_block = new_immBlock();
1794 ir_node *body_block = new_immBlock();
1796 add_immBlock_pred(body_block, jmp);
1799 if (statement->body != NULL) {
1800 ir_node *old_continue_label = continue_label;
1801 ir_node *old_break_label = break_label;
1802 continue_label = header_block;
1803 break_label = false_block;
1805 statement_to_firm(statement->body);
1807 assert(continue_label == header_block);
1808 assert(break_label == false_block);
1809 continue_label = old_continue_label;
1810 break_label = old_break_label;
1812 if (get_cur_block() == NULL) {
1813 mature_immBlock(header_block);
1814 mature_immBlock(body_block);
1815 mature_immBlock(false_block);
1820 ir_node *body_jmp = new_Jmp();
1821 add_immBlock_pred(header_block, body_jmp);
1822 mature_immBlock(header_block);
1824 /* create the condition */
1825 set_cur_block(header_block);
1827 create_condition_evaluation(statement->condition, body_block, false_block);
1828 mature_immBlock(body_block);
1829 mature_immBlock(false_block);
1830 mature_immBlock(header_block);
1832 set_cur_block(false_block);
1835 static void for_statement_to_firm(for_statement_t *statement)
1837 ir_node *jmp = NULL;
1838 if (get_cur_block() != NULL) {
1839 if(statement->initialisation != NULL) {
1840 expression_to_firm(statement->initialisation);
1845 /* create the step block */
1846 ir_node *const step_block = new_immBlock();
1847 if (statement->step != NULL) {
1848 expression_to_firm(statement->step);
1850 ir_node *const step_jmp = new_Jmp();
1852 /* create the header block */
1853 ir_node *const header_block = new_immBlock();
1855 add_immBlock_pred(header_block, jmp);
1857 add_immBlock_pred(header_block, step_jmp);
1859 /* the false block */
1860 ir_node *const false_block = new_immBlock();
1863 ir_node * body_block;
1864 if (statement->body != NULL) {
1865 ir_node *const old_continue_label = continue_label;
1866 ir_node *const old_break_label = break_label;
1867 continue_label = step_block;
1868 break_label = false_block;
1870 body_block = new_immBlock();
1871 statement_to_firm(statement->body);
1873 assert(continue_label == step_block);
1874 assert(break_label == false_block);
1875 continue_label = old_continue_label;
1876 break_label = old_break_label;
1878 if (get_cur_block() != NULL) {
1879 ir_node *const jmp = new_Jmp();
1880 add_immBlock_pred(step_block, jmp);
1883 body_block = step_block;
1886 /* create the condition */
1887 set_cur_block(header_block);
1888 if (statement->condition != NULL) {
1889 create_condition_evaluation(statement->condition, body_block,
1892 keep_alive(header_block);
1893 ir_node *jmp = new_Jmp();
1894 add_immBlock_pred(body_block, jmp);
1897 mature_immBlock(body_block);
1898 mature_immBlock(false_block);
1899 mature_immBlock(step_block);
1900 mature_immBlock(header_block);
1901 mature_immBlock(false_block);
1903 set_cur_block(false_block);
1906 static void create_declaration_entity(declaration_t *declaration,
1907 declaration_type_t declaration_type,
1908 ir_type *parent_type)
1910 ident *id = new_id_from_str(declaration->symbol->string);
1911 ir_type *irtype = get_ir_type(declaration->type);
1912 ir_entity *entity = new_entity(parent_type, id, irtype);
1913 set_entity_ld_ident(entity, id);
1915 declaration->declaration_type = declaration_type;
1916 declaration->v.entity = entity;
1917 set_entity_variability(entity, variability_uninitialized);
1918 /* TODO: visibility? */
1921 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1923 enum compound_graph_entry_type_t {
1924 COMPOUND_GRAPH_ENTRY_ARRAY,
1925 COMPOUND_GRAPH_ENTRY_COMPOUND
1928 struct compound_graph_path_entry_t {
1934 compound_graph_path_entry_t *prev;
1937 static void create_initializer_list(initializer_list_t *initializer,
1938 type_t *type, ir_entity *entity,
1939 compound_graph_path_entry_t *entry,
1942 static void create_initializer_value(initializer_value_t *initializer,
1944 compound_graph_path_entry_t *entry,
1947 ir_node *node = expression_to_firm(initializer->value);
1949 ir_type *type = get_entity_type(entity);
1950 compound_graph_path *path = new_compound_graph_path(type, len);
1953 for( ; entry != NULL; entry = entry->prev, --i) {
1955 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
1956 set_compound_graph_path_node(path, i, entry->v.entity);
1958 assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
1959 set_compound_graph_path_array_index(path, i, entry->v.array_index);
1964 add_compound_ent_value_w_path(entity, node, path);
1967 static void create_initializer_compound(initializer_list_t *initializer,
1968 compound_type_t *type,
1970 compound_graph_path_entry_t *last_entry,
1973 declaration_t *compound_declaration = type->declaration;
1975 declaration_t *compound_entry = compound_declaration->context.declarations;
1977 compound_graph_path_entry_t entry;
1978 entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
1979 entry.prev = last_entry;
1983 for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
1984 if(compound_entry->symbol == NULL)
1986 if(compound_entry->namespc != NAMESPACE_NORMAL)
1989 if(i >= initializer->len)
1992 entry.v.entity = compound_entry->v.entity;
1994 initializer_t *sub_initializer = initializer->initializers[i];
1996 assert(compound_entry != NULL);
1997 assert(compound_entry->declaration_type
1998 == DECLARATION_TYPE_COMPOUND_MEMBER);
2000 if(sub_initializer->type == INITIALIZER_VALUE) {
2001 create_initializer_value((initializer_value_t*) sub_initializer,
2002 entity, &entry, len);
2004 assert(sub_initializer->type == INITIALIZER_LIST);
2005 create_initializer_list((initializer_list_t*) sub_initializer,
2006 compound_entry->type, entity, &entry, len);
2013 static void create_initializer_array(initializer_list_t *initializer,
2014 array_type_t *type, ir_entity *entity,
2015 compound_graph_path_entry_t *last_entry,
2018 type_t *element_type = type->element_type;
2020 compound_graph_path_entry_t entry;
2021 entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2022 entry.prev = last_entry;
2025 for(size_t i = 0; i < initializer->len; ++i) {
2026 entry.v.array_index = i;
2028 initializer_t *sub_initializer = initializer->initializers[i];
2030 if(sub_initializer->type == INITIALIZER_VALUE) {
2031 create_initializer_value((initializer_value_t*) sub_initializer,
2032 entity, &entry, len);
2034 assert(sub_initializer->type == INITIALIZER_LIST);
2035 create_initializer_list((initializer_list_t*) sub_initializer,
2036 element_type, entity, &entry, len);
2041 static void create_initializer_list(initializer_list_t *initializer,
2042 type_t *type, ir_entity *entity,
2043 compound_graph_path_entry_t *entry, int len)
2045 if(type->type == TYPE_ARRAY) {
2046 create_initializer_array(initializer, (array_type_t*) type,
2047 entity, entry, len);
2049 assert(type->type == TYPE_COMPOUND_STRUCT
2050 || type->type == TYPE_COMPOUND_UNION);
2051 create_initializer_compound(initializer, (compound_type_t*) type,
2052 entity, entry, len);
2056 static void create_initializer(declaration_t *declaration)
2058 initializer_t *initializer = declaration->init.initializer;
2059 if(initializer == NULL)
2062 if(initializer->type == INITIALIZER_VALUE) {
2063 initializer_value_t *initializer_value
2064 = (initializer_value_t*) initializer;
2065 ir_node *value = expression_to_firm(initializer_value->value);
2067 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2068 set_value(declaration->v.value_number, value);
2070 ir_entity *entity = declaration->v.entity;
2072 set_entity_variability(entity, variability_initialized);
2073 set_atomic_ent_value(entity, value);
2076 assert(initializer->type == INITIALIZER_LIST);
2077 initializer_list_t *list = (initializer_list_t*) initializer;
2079 declaration_type_t declaration_type = declaration->declaration_type;
2080 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2081 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2083 ir_entity *entity = declaration->v.entity;
2084 set_entity_variability(entity, variability_initialized);
2086 create_initializer_list(list, declaration->type, entity, NULL, 0);
2090 static void create_local_variable(declaration_t *declaration)
2092 assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2094 bool needs_entity = declaration->address_taken;
2095 type_t *type = skip_typeref(declaration->type);
2097 if(type->type == TYPE_ARRAY
2098 || type->type == TYPE_COMPOUND_STRUCT
2099 || type->type == TYPE_COMPOUND_UNION) {
2100 needs_entity = true;
2104 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2105 create_declaration_entity(declaration,
2106 DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2109 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2110 declaration->v.value_number = next_value_number_function;
2111 ++next_value_number_function;
2114 create_initializer(declaration);
2117 static void declaration_statement_to_firm(declaration_statement_t *statement)
2119 declaration_t *declaration = statement->declarations_begin;
2120 declaration_t *end = statement->declarations_end->next;
2121 for( ; declaration != end; declaration = declaration->next) {
2122 type_t *type = declaration->type;
2124 switch(declaration->storage_class) {
2125 case STORAGE_CLASS_TYPEDEF:
2127 case STORAGE_CLASS_STATIC:
2128 panic("static local vars not implemented yet");
2129 case STORAGE_CLASS_ENUM_ENTRY:
2130 panic("enum entry declaration in local block found");
2131 case STORAGE_CLASS_EXTERN:
2132 panic("extern declaration in local block found");
2133 case STORAGE_CLASS_NONE:
2134 case STORAGE_CLASS_AUTO:
2135 case STORAGE_CLASS_REGISTER:
2136 if(type->type == TYPE_FUNCTION) {
2137 panic("nested functions not supported yet");
2139 create_local_variable(declaration);
2143 panic("invalid storage class found");
2147 static void create_jump_statement(const statement_t *statement,
2148 ir_node *target_block)
2150 if(get_cur_block() == NULL)
2153 dbg_info *dbgi = get_dbg_info(&statement->source_position);
2154 ir_node *jump = new_d_Jmp(dbgi);
2155 add_immBlock_pred(target_block, jump);
2157 set_cur_block(NULL);
2160 static void switch_statement_to_firm(const switch_statement_t *statement)
2162 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2164 ir_node *expression = expression_to_firm(statement->expression);
2165 ir_node *cond = new_d_Cond(dbgi, expression);
2166 ir_node *break_block = new_immBlock();
2168 set_cur_block(NULL);
2170 ir_node *const old_switch_cond = current_switch_cond;
2171 ir_node *const old_break_label = break_label;
2172 const bool old_saw_default_label = saw_default_label;
2173 current_switch_cond = cond;
2174 break_label = break_block;
2176 statement_to_firm(statement->body);
2178 if(get_cur_block() != NULL) {
2179 ir_node *jmp = new_Jmp();
2180 add_immBlock_pred(break_block, jmp);
2183 if (!saw_default_label) {
2184 set_cur_block(get_nodes_block(cond));
2185 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2186 MAGIC_DEFAULT_PN_NUMBER);
2187 add_immBlock_pred(break_block, proj);
2190 assert(current_switch_cond == cond);
2191 assert(break_label == break_block);
2192 current_switch_cond = old_switch_cond;
2193 break_label = old_break_label;
2194 saw_default_label = old_saw_default_label;
2196 mature_immBlock(break_block);
2197 set_cur_block(break_block);
2200 static long fold_constant(const expression_t *expression)
2202 ir_graph *old_current_ir_graph = current_ir_graph;
2203 current_ir_graph = get_const_code_irg();
2205 ir_node *cnst = expression_to_firm(expression);
2206 if(!is_Const(cnst)) {
2207 panic("couldn't fold constantl");
2209 tarval *tv = get_Const_tarval(cnst);
2210 if(!tarval_is_long(tv)) {
2211 panic("folded constant not an integer");
2214 long res = get_tarval_long(tv);
2216 current_ir_graph = old_current_ir_graph;
2220 static void case_label_to_firm(const case_label_statement_t *statement)
2222 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2224 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2226 /* let's create a node and hope firm constant folding creates a Const
2229 set_cur_block(get_nodes_block(current_switch_cond));
2230 if(statement->expression) {
2231 long pn = fold_constant(statement->expression);
2232 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2233 /* oops someone detected our cheating... */
2234 panic("magic default pn used");
2236 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2238 saw_default_label = true;
2239 proj = new_d_defaultProj(dbgi, current_switch_cond,
2240 MAGIC_DEFAULT_PN_NUMBER);
2243 ir_node *block = new_immBlock();
2244 if (fallthrough != NULL) {
2245 add_immBlock_pred(block, fallthrough);
2247 add_immBlock_pred(block, proj);
2248 mature_immBlock(block);
2251 static ir_node *get_label_block(declaration_t *label)
2253 assert(label->namespc == NAMESPACE_LABEL);
2255 if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2256 return label->v.block;
2258 assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2260 ir_node *old_cur_block = get_cur_block();
2261 ir_node *block = new_immBlock();
2262 set_cur_block(old_cur_block);
2264 label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2265 label->v.block = block;
2267 ARR_APP1(ir_node *, imature_blocks, block);
2272 static void label_to_firm(const label_statement_t *statement)
2274 ir_node *block = get_label_block(statement->label);
2276 if(get_cur_block() != NULL) {
2277 ir_node *jmp = new_Jmp();
2278 add_immBlock_pred(block, jmp);
2281 set_cur_block(block);
2284 statement_to_firm(statement->label_statement);
2287 static void goto_to_firm(const goto_statement_t *statement)
2289 if(get_cur_block() == NULL)
2292 ir_node *block = get_label_block(statement->label);
2293 ir_node *jmp = new_Jmp();
2294 add_immBlock_pred(block, jmp);
2296 set_cur_block(NULL);
2299 static void statement_to_firm(statement_t *statement)
2301 switch(statement->type) {
2302 case STATEMENT_COMPOUND:
2303 compound_statement_to_firm((compound_statement_t*) statement);
2305 case STATEMENT_RETURN:
2306 return_statement_to_firm((return_statement_t*) statement);
2308 case STATEMENT_EXPRESSION:
2309 expression_statement_to_firm((expression_statement_t*) statement);
2312 if_statement_to_firm((if_statement_t*) statement);
2314 case STATEMENT_WHILE:
2315 while_statement_to_firm((while_statement_t*) statement);
2317 case STATEMENT_DO_WHILE:
2318 do_while_statement_to_firm((do_while_statement_t*) statement);
2320 case STATEMENT_DECLARATION:
2321 declaration_statement_to_firm((declaration_statement_t*) statement);
2323 case STATEMENT_BREAK:
2324 create_jump_statement(statement, break_label);
2326 case STATEMENT_CONTINUE:
2327 create_jump_statement(statement, continue_label);
2329 case STATEMENT_SWITCH:
2330 switch_statement_to_firm((switch_statement_t*) statement);
2332 case STATEMENT_CASE_LABEL:
2333 case_label_to_firm((case_label_statement_t*) statement);
2336 for_statement_to_firm((for_statement_t*) statement);
2338 case STATEMENT_LABEL:
2339 label_to_firm((label_statement_t*) statement);
2341 case STATEMENT_GOTO:
2342 goto_to_firm((goto_statement_t*) statement);
2347 panic("Statement not implemented\n");
2350 static int count_local_declarations(const declaration_t * decl,
2351 const declaration_t *const end)
2354 for (; decl != end; decl = decl->next) {
2355 const type_t *type = skip_typeref(decl->type);
2356 switch (type->type) {
2360 if (!decl->address_taken) ++count;
2369 static int count_decls_in_stmts(const statement_t *stmt)
2372 for (; stmt != NULL; stmt = stmt->next) {
2373 switch (stmt->type) {
2374 case STATEMENT_DECLARATION: {
2375 const declaration_statement_t *const decl_stmt =
2376 (const declaration_statement_t*)stmt;
2377 count += count_local_declarations(decl_stmt->declarations_begin,
2378 decl_stmt->declarations_end->next);
2382 case STATEMENT_COMPOUND: {
2383 const compound_statement_t *const comp =
2384 (const compound_statement_t*)stmt;
2385 count += count_decls_in_stmts(comp->statements);
2389 case STATEMENT_IF: {
2390 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2391 count += count_decls_in_stmts(if_stmt->true_statement);
2392 count += count_decls_in_stmts(if_stmt->false_statement);
2396 case STATEMENT_SWITCH: {
2397 const switch_statement_t *const switch_stmt =
2398 (const switch_statement_t*)stmt;
2399 count += count_decls_in_stmts(switch_stmt->body);
2403 case STATEMENT_LABEL: {
2404 const label_statement_t *const label_stmt =
2405 (const label_statement_t*)stmt;
2406 count += count_decls_in_stmts(label_stmt->label_statement);
2410 case STATEMENT_WHILE: {
2411 const while_statement_t *const while_stmt =
2412 (const while_statement_t*)stmt;
2413 count += count_decls_in_stmts(while_stmt->body);
2417 case STATEMENT_DO_WHILE: {
2418 const do_while_statement_t *const do_while_stmt =
2419 (const do_while_statement_t*)stmt;
2420 count += count_decls_in_stmts(do_while_stmt->body);
2424 case STATEMENT_FOR: {
2425 const for_statement_t *const for_stmt =
2426 (const for_statement_t*)stmt;
2427 /* TODO initialisation */
2428 count += count_decls_in_stmts(for_stmt->body);
2432 case STATEMENT_BREAK:
2433 case STATEMENT_CASE_LABEL:
2434 case STATEMENT_CONTINUE:
2435 case STATEMENT_EXPRESSION:
2436 case STATEMENT_GOTO:
2437 case STATEMENT_INVALID:
2438 case STATEMENT_RETURN:
2445 static int get_function_n_local_vars(declaration_t *declaration)
2449 /* count parameters */
2450 count += count_local_declarations(declaration->context.declarations, NULL);
2452 /* count local variables declared in body */
2453 count += count_decls_in_stmts(declaration->init.statement);
2458 static void initialize_function_parameters(declaration_t *declaration)
2460 ir_graph *irg = current_ir_graph;
2461 ir_node *args = get_irg_args(irg);
2462 ir_node *start_block = get_irg_start_block(irg);
2465 declaration_t *parameter = declaration->context.declarations;
2466 for( ; parameter != NULL; parameter = parameter->next) {
2467 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2468 type_t *type = parameter->type;
2470 bool needs_entity = parameter->address_taken;
2471 if(type->type == TYPE_COMPOUND_STRUCT
2472 || type->type == TYPE_COMPOUND_UNION) {
2473 needs_entity = true;
2477 panic("entities for function parameters not implemented yet");
2480 ir_mode *mode = get_ir_mode(parameter->type);
2482 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2485 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2486 parameter->v.value_number = next_value_number_function;
2487 ++next_value_number_function;
2489 set_value(parameter->v.value_number, proj);
2493 static void create_function(declaration_t *declaration)
2495 ir_entity *entity = get_function_entity(declaration);
2497 if(declaration->init.statement == NULL)
2500 current_function_decl = declaration;
2501 current_function_name = NULL;
2503 assert(imature_blocks == NULL);
2504 imature_blocks = NEW_ARR_F(ir_node*, 0);
2506 int n_local_vars = get_function_n_local_vars(declaration);
2507 ir_graph *irg = new_ir_graph(entity, n_local_vars);
2508 ir_node *first_block = get_cur_block();
2510 next_value_number_function = 0;
2511 initialize_function_parameters(declaration);
2513 statement_to_firm(declaration->init.statement);
2515 ir_node *end_block = get_irg_end_block(irg);
2517 /* do we have a return statement yet? */
2518 if(get_cur_block() != NULL) {
2519 assert(declaration->type->type == TYPE_FUNCTION);
2520 const function_type_t* const func_type
2521 = (const function_type_t*) declaration->type;
2523 if (func_type->result_type == type_void) {
2524 ret = new_Return(get_store(), 0, NULL);
2526 ir_mode *const mode = get_ir_mode(func_type->result_type);
2528 // ยง5.1.2.2.3 main implicitly returns 0
2529 if (strcmp(declaration->symbol->string, "main") == 0) {
2530 in[0] = new_Const(mode, get_mode_null(mode));
2532 in[0] = new_Unknown(mode);
2534 ret = new_Return(get_store(), 1, in);
2536 add_immBlock_pred(end_block, ret);
2539 for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2540 mature_immBlock(imature_blocks[i]);
2542 DEL_ARR_F(imature_blocks);
2543 imature_blocks = NULL;
2545 mature_immBlock(first_block);
2546 mature_immBlock(end_block);
2548 irg_finalize_cons(irg);
2550 /* finalize the frame type */
2551 ir_type *frame_type = get_irg_frame_type(irg);
2552 int n = get_compound_n_members(frame_type);
2555 for(int i = 0; i < n; ++i) {
2556 ir_entity *entity = get_compound_member(frame_type, i);
2557 ir_type *entity_type = get_entity_type(entity);
2559 int align = get_type_alignment_bytes(entity_type);
2560 if(align > align_all)
2564 misalign = offset % align;
2566 offset += align - misalign;
2570 set_entity_offset(entity, offset);
2571 offset += get_type_size_bytes(entity_type);
2573 set_type_size_bytes(frame_type, offset);
2574 set_type_alignment_bytes(frame_type, align_all);
2575 set_type_state(frame_type, layout_fixed);
2580 static void create_global_variable(declaration_t *declaration)
2582 ir_type *global_type = get_glob_type();
2583 create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2586 ir_entity *entity = declaration->v.entity;
2587 if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2588 set_entity_visibility(entity, visibility_local);
2589 } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2590 set_entity_visibility(entity, visibility_external_allocated);
2592 set_entity_visibility(entity, visibility_external_visible);
2594 current_ir_graph = get_const_code_irg();
2595 create_initializer(declaration);
2598 static void context_to_firm(context_t *context)
2600 declaration_t *declaration = context->declarations;
2601 for( ; declaration != NULL; declaration = declaration->next) {
2602 if(declaration->namespc != NAMESPACE_NORMAL)
2604 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2605 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2607 if(declaration->symbol == NULL)
2610 type_t *type = declaration->type;
2611 if(type->type == TYPE_FUNCTION) {
2612 create_function(declaration);
2614 create_global_variable(declaration);
2619 void translation_unit_to_firm(translation_unit_t *unit)
2621 /* just to be sure */
2622 continue_label = NULL;
2624 current_switch_cond = NULL;
2626 context_to_firm(& unit->context);