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 typedef enum declaration_type_t {
39 DECLARATION_TYPE_UNKNOWN,
40 DECLARATION_TYPE_FUNCTION,
41 DECLARATION_TYPE_GLOBAL_VARIABLE,
42 DECLARATION_TYPE_LOCAL_VARIABLE,
43 DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
44 DECLARATION_TYPE_COMPOUND_MEMBER,
45 DECLARATION_TYPE_LABEL_BLOCK,
48 static ir_type *get_ir_type(type_t *type);
50 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
54 const declaration_t *declaration = & value_numbers[pos]->declaration;
56 print_warning_prefix(declaration->source_position);
57 fprintf(stderr, "variable '%s' might be used uninitialized\n",
58 declaration->symbol->string);
60 fprintf(stderr, "Some variable might be used uninitialized\n");
61 return new_r_Unknown(irg, mode);
64 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
66 const source_position_t *pos = (const source_position_t*) dbg;
69 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
73 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
75 const source_position_t *pos = (const source_position_t*) dbg;
80 return pos->input_name;
83 void init_ast2firm(void)
85 type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
86 type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
87 type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
89 ir_type_int = get_ir_type(type_int);
90 ir_type_const_char = get_ir_type(type_const_char);
91 ir_type_void = get_ir_type(type_int); /* we don't have a real void
93 ir_type_void_ptr = new_type_pointer(new_id_from_str("void_ptr"),
94 ir_type_void, mode_P_data);
96 type_void->firm_type = ir_type_void;
99 void exit_ast2firm(void)
103 static unsigned unique_id = 0;
105 static ident *unique_ident(const char *tag)
109 snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
111 return new_id_from_str(buf);
114 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
116 switch(atomic_type->atype) {
117 case ATOMIC_TYPE_SCHAR:
118 case ATOMIC_TYPE_CHAR:
120 case ATOMIC_TYPE_UCHAR:
122 case ATOMIC_TYPE_SHORT:
124 case ATOMIC_TYPE_USHORT:
126 case ATOMIC_TYPE_LONG:
127 case ATOMIC_TYPE_INT:
129 case ATOMIC_TYPE_ULONG:
130 case ATOMIC_TYPE_UINT:
132 case ATOMIC_TYPE_LONGLONG:
134 case ATOMIC_TYPE_ULONGLONG:
136 case ATOMIC_TYPE_FLOAT:
138 case ATOMIC_TYPE_DOUBLE:
140 case ATOMIC_TYPE_LONG_DOUBLE:
142 case ATOMIC_TYPE_BOOL:
144 #ifdef PROVIDE_COMPLEX
145 case ATOMIC_TYPE_FLOAT_COMPLEX:
146 case ATOMIC_TYPE_DOUBLE_COMPLEX:
147 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
148 panic("complex lowering not implemented yet");
150 case ATOMIC_TYPE_FLOAT_IMAGINARY:
151 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
152 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
153 panic("imaginary lowering not implemented yet");
156 case ATOMIC_TYPE_VOID:
157 /* firm has no real void... */
159 case ATOMIC_TYPE_INVALID:
162 panic("Encountered unknown atomic type");
166 static unsigned get_type_size(type_t *type);
168 static unsigned get_atomic_type_size(const atomic_type_t *type)
170 switch(type->atype) {
171 case ATOMIC_TYPE_CHAR:
172 case ATOMIC_TYPE_SCHAR:
173 case ATOMIC_TYPE_UCHAR:
176 case ATOMIC_TYPE_SHORT:
177 case ATOMIC_TYPE_USHORT:
180 case ATOMIC_TYPE_BOOL:
181 case ATOMIC_TYPE_INT:
182 case ATOMIC_TYPE_UINT:
183 case ATOMIC_TYPE_LONG:
184 case ATOMIC_TYPE_ULONG:
185 case ATOMIC_TYPE_FLOAT:
188 case ATOMIC_TYPE_LONGLONG:
189 case ATOMIC_TYPE_ULONGLONG:
190 case ATOMIC_TYPE_DOUBLE:
193 case ATOMIC_TYPE_LONG_DOUBLE:
196 case ATOMIC_TYPE_VOID:
199 case ATOMIC_TYPE_INVALID:
202 panic("Trying to determine size of invalid atomic type");
205 static unsigned get_compound_type_size(compound_type_t *type)
207 ir_type *irtype = get_ir_type(&type->type);
208 return get_type_size_bytes(irtype);
211 static unsigned get_array_type_size(array_type_t *type)
213 ir_type *irtype = get_ir_type(&type->type);
214 return get_type_size_bytes(irtype);
217 static unsigned get_type_size(type_t *type)
219 type = skip_typeref(type);
223 return get_atomic_type_size((const atomic_type_t*) type);
225 return get_mode_size_bytes(mode_Is);
226 case TYPE_COMPOUND_UNION:
227 case TYPE_COMPOUND_STRUCT:
228 return get_compound_type_size((compound_type_t*) type);
230 /* just a pointer to the function */
231 return get_mode_size_bytes(mode_P_code);
233 return get_mode_size_bytes(mode_P_data);
235 return get_array_type_size((array_type_t*) type);
242 panic("Trying to determine size of invalid type");
245 static unsigned count_parameters(const function_type_t *function_type)
249 function_parameter_t *parameter = function_type->parameters;
250 for ( ; parameter != NULL; parameter = parameter->next) {
260 static long fold_constant(const expression_t *expression);
262 static ir_type *create_atomic_type(const atomic_type_t *type)
264 ir_mode *mode = get_atomic_mode(type);
265 ident *id = get_mode_ident(mode);
266 ir_type *irtype = new_type_primitive(id, mode);
271 static ir_type *create_method_type(const function_type_t *function_type)
273 type_t *result_type = function_type->result_type;
275 ident *id = unique_ident("functiontype");
276 int n_parameters = count_parameters(function_type);
277 int n_results = result_type == type_void ? 0 : 1;
278 ir_type *irtype = new_type_method(id, n_parameters, n_results);
280 if(result_type != type_void) {
281 ir_type *restype = get_ir_type(result_type);
282 set_method_res_type(irtype, 0, restype);
285 function_parameter_t *parameter = function_type->parameters;
287 for( ; parameter != NULL; parameter = parameter->next) {
288 ir_type *p_irtype = get_ir_type(parameter->type);
289 set_method_param_type(irtype, n, p_irtype);
293 if(function_type->variadic || function_type->unspecified_parameters) {
294 set_method_variadicity(irtype, variadicity_variadic);
300 static ir_type *create_pointer_type(pointer_type_t *type)
302 type_t *points_to = type->points_to;
303 ir_type *ir_points_to;
304 /* Avoid endless recursion if the points_to type contains this poiner type
305 * again (might be a struct). We therefore first create a void* pointer
306 * and then set the real points_to type
308 ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
309 ir_type_void, mode_P_data);
310 type->type.firm_type = ir_type;
312 ir_points_to = get_ir_type(points_to);
313 set_pointer_points_to_type(ir_type, ir_points_to);
318 static ir_type *create_array_type(array_type_t *type)
320 type_t *element_type = type->element_type;
321 ir_type *ir_element_type = get_ir_type(element_type);
323 ident *id = unique_ident("array");
324 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
326 if(type->size != NULL) {
327 int n_elements = fold_constant(type->size);
329 set_array_bounds_int(ir_type, 0, 0, n_elements);
331 size_t elemsize = get_type_size_bytes(ir_element_type);
332 int align = get_type_alignment_bytes(ir_element_type);
333 if(elemsize % align > 0) {
334 elemsize += align - (elemsize % align);
336 set_type_size_bytes(ir_type, n_elements * elemsize);
337 set_type_alignment_bytes(ir_type, align);
338 set_type_state(ir_type, layout_fixed);
344 #define INVALID_TYPE ((ir_type_ptr)-1)
346 static ir_type *create_struct_type(compound_type_t *type)
348 symbol_t *symbol = type->declaration->symbol;
351 id = unique_ident(symbol->string);
353 id = unique_ident("__anonymous_struct");
355 ir_type *ir_type = new_type_struct(id);
357 type->type.firm_type = ir_type;
361 declaration_t *entry = type->declaration->context.declarations;
362 for( ; entry != NULL; entry = entry->next) {
363 if(entry->namespc != NAMESPACE_NORMAL)
366 ident *ident = new_id_from_str(entry->symbol->string);
367 ir_type_ptr entry_ir_type = get_ir_type(entry->type);
369 int entry_size = get_type_size_bytes(entry_ir_type);
370 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
371 int misalign = offset % entry_alignment;
374 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
375 set_entity_offset(entity, offset);
376 add_struct_member(ir_type, entity);
377 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
378 entry->v.entity = entity;
380 offset += entry_size;
381 if(entry_alignment > align_all) {
382 if(entry_alignment % align_all != 0) {
383 panic("Uneven alignments not supported yet");
385 align_all = entry_alignment;
389 int misalign = offset % align_all;
391 set_type_alignment_bytes(ir_type, align_all);
392 set_type_size_bytes(ir_type, offset);
393 set_type_state(ir_type, layout_fixed);
398 static ir_type *create_union_type(compound_type_t *type)
400 declaration_t *declaration = type->declaration;
401 symbol_t *symbol = declaration->symbol;
404 id = unique_ident(symbol->string);
406 id = unique_ident("__anonymous_union");
408 ir_type *ir_type = new_type_union(id);
410 type->type.firm_type = ir_type;
414 declaration_t *entry = declaration->context.declarations;
415 for( ; entry != NULL; entry = entry->next) {
416 if(entry->namespc != NAMESPACE_NORMAL)
419 ident *ident = new_id_from_str(entry->symbol->string);
420 ir_type_ptr entry_ir_type = get_ir_type(entry->type);
422 int entry_size = get_type_size_bytes(entry_ir_type);
423 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
425 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
426 add_union_member(ir_type, entity);
427 set_entity_offset(entity, 0);
428 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
429 entry->v.entity = entity;
431 if(entry_size > size) {
434 if(entry_alignment > align_all) {
435 if(entry_alignment % align_all != 0) {
436 panic("Uneven alignments not supported yet");
438 align_all = entry_alignment;
442 set_type_alignment_bytes(ir_type, align_all);
443 set_type_size_bytes(ir_type, size);
444 set_type_state(ir_type, layout_fixed);
449 static ir_type *get_ir_type(type_t *type)
451 assert(type != NULL);
453 type = skip_typeref(type);
455 if(type->firm_type != NULL) {
456 assert(type->firm_type != INVALID_TYPE);
457 return type->firm_type;
460 ir_type *firm_type = NULL;
463 firm_type = create_atomic_type((atomic_type_t*) type);
466 firm_type = create_method_type((function_type_t*) type);
469 firm_type = create_pointer_type((pointer_type_t*) type);
472 firm_type = create_array_type((array_type_t*) type);
474 case TYPE_COMPOUND_STRUCT:
475 firm_type = create_struct_type((compound_type_t*) type);
477 case TYPE_COMPOUND_UNION:
478 firm_type = create_union_type((compound_type_t*) type);
481 firm_type = ir_type_int;
489 if(firm_type == NULL)
490 panic("unknown type found");
492 type->firm_type = firm_type;
496 static inline ir_mode *get_ir_mode(type_t *type)
498 ir_type *irtype = get_ir_type(type);
500 /* firm doesn't report a mode for arrays somehow... */
501 if(is_Array_type(irtype)) {
505 ir_mode *mode = get_type_mode(irtype);
506 assert(mode != NULL);
510 static ir_entity* get_function_entity(declaration_t *declaration)
512 if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
513 return declaration->v.entity;
514 assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
516 symbol_t *symbol = declaration->symbol;
517 ident *id = new_id_from_str(symbol->string);
519 ir_type *global_type = get_glob_type();
520 ir_type *ir_type_method = get_ir_type(declaration->type);
521 assert(is_Method_type(ir_type_method));
523 ir_entity *entity = new_entity(global_type, id, ir_type_method);
524 set_entity_ld_ident(entity, id);
525 if(declaration->storage_class == STORAGE_CLASS_STATIC
526 || declaration->is_inline) {
527 set_entity_visibility(entity, visibility_local);
528 } else if(declaration->init.statement != NULL) {
529 set_entity_visibility(entity, visibility_external_visible);
531 set_entity_visibility(entity, visibility_external_allocated);
534 declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
535 declaration->v.entity = entity;
542 static ir_node *expression_to_firm(const expression_t *expression);
544 static dbg_info *get_dbg_info(const source_position_t *pos)
546 return (dbg_info*) pos;
549 static ir_node *const_to_firm(const const_t *cnst)
551 dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
552 ir_mode *mode = get_ir_mode(cnst->expression.datatype);
555 if(mode_is_float(mode)) {
556 tv = new_tarval_from_double(cnst->v.float_value, mode);
558 tv = new_tarval_from_long(cnst->v.int_value, mode);
561 return new_d_Const(dbgi, mode, tv);
564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
566 assert(entity != NULL);
567 union symconst_symbol sym;
568 sym.entity_p = entity;
569 return new_d_SymConst(dbgi, sym, symconst_addr_ent);
572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
574 ir_type *global_type = get_glob_type();
575 ir_type *type = new_type_array(unique_ident("strtype"), 1,
578 ident *id = unique_ident("Lstr");
579 ir_entity *entity = new_entity(global_type, id, type);
580 set_entity_ld_ident(entity, id);
581 set_entity_variability(entity, variability_constant);
583 ir_type *elem_type = ir_type_const_char;
584 ir_mode *mode = get_type_mode(elem_type);
586 const char *string = literal->value;
587 size_t slen = strlen(string) + 1;
589 set_array_lower_bound_int(type, 0, 0);
590 set_array_upper_bound_int(type, 0, slen);
591 set_type_size_bytes(type, slen);
592 set_type_state(type, layout_fixed);
594 tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
595 for(size_t i = 0; i < slen; ++i) {
596 tvs[i] = new_tarval_from_long(string[i], mode);
599 set_array_entity_values(entity, tvs, slen);
602 dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
604 return create_symconst(dbgi, entity);
607 static ir_node *deref_address(type_t *const type, ir_node *const addr,
608 dbg_info *const dbgi)
610 switch (type->type) {
612 case TYPE_COMPOUND_STRUCT:
613 case TYPE_COMPOUND_UNION:
617 ir_mode *const mode = get_ir_mode(type);
618 ir_node *const memory = get_store();
619 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
620 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
621 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
628 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
630 dbg_info *dbgi = get_dbg_info(&ref->expression.source_position);
631 declaration_t *declaration = ref->declaration;
632 type_t *type = skip_typeref(declaration->type);
634 switch((declaration_type_t) declaration->declaration_type) {
635 case DECLARATION_TYPE_UNKNOWN:
637 case DECLARATION_TYPE_LOCAL_VARIABLE: {
638 ir_mode *mode = get_ir_mode(type);
639 return get_value(declaration->v.value_number, mode);
641 case DECLARATION_TYPE_FUNCTION: {
642 return create_symconst(dbgi, declaration->v.entity);
644 case DECLARATION_TYPE_GLOBAL_VARIABLE: {
645 ir_entity *entity = declaration->v.entity;
646 ir_node *symconst = create_symconst(dbgi, entity);
647 return deref_address(type, symconst, dbgi);
649 case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
650 ir_entity *entity = declaration->v.entity;
651 ir_node *frame = get_irg_frame(current_ir_graph);
652 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
653 return deref_address(type, sel, dbgi);
656 case DECLARATION_TYPE_COMPOUND_MEMBER:
657 case DECLARATION_TYPE_LABEL_BLOCK:
658 panic("not implemented reference type");
661 panic("reference to declaration with unknown type found");
664 static ir_node *reference_addr(const reference_expression_t *ref)
666 dbg_info *dbgi = get_dbg_info(&ref->expression.source_position);
667 declaration_t *declaration = ref->declaration;
669 switch((declaration_type_t) declaration->declaration_type) {
670 case DECLARATION_TYPE_UNKNOWN:
672 case DECLARATION_TYPE_LOCAL_VARIABLE:
673 panic("local variable without entity has no address");
674 case DECLARATION_TYPE_FUNCTION: {
675 return create_symconst(dbgi, declaration->v.entity);
677 case DECLARATION_TYPE_GLOBAL_VARIABLE: {
678 ir_entity *entity = declaration->v.entity;
679 ir_node *symconst = create_symconst(dbgi, entity);
682 case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
683 ir_entity *entity = declaration->v.entity;
684 ir_node *frame = get_irg_frame(current_ir_graph);
685 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
689 case DECLARATION_TYPE_COMPOUND_MEMBER:
690 case DECLARATION_TYPE_LABEL_BLOCK:
691 panic("not implemented reference type");
694 panic("reference to declaration with unknown type found");
697 static ir_node *call_expression_to_firm(const call_expression_t *call)
699 assert(get_cur_block() != NULL);
701 expression_t *function = call->function;
702 ir_node *callee = expression_to_firm(function);
704 function_type_t *function_type;
705 if (function->datatype->type == TYPE_POINTER) {
706 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
707 assert(ptr_type->points_to->type == TYPE_FUNCTION);
708 function_type = (function_type_t*)ptr_type->points_to;
710 assert(function->datatype->type == TYPE_FUNCTION);
711 function_type = (function_type_t*)function->datatype;
714 int n_parameters = 0;
715 call_argument_t *argument = call->arguments;
716 for( ; argument != NULL; argument = argument->next) {
720 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
721 ir_type *new_method_type = NULL;
722 if(function_type->variadic || function_type->unspecified_parameters) {
723 /* we need to construct a new method type matching the call
725 int n_res = get_method_n_ress(ir_method_type);
726 new_method_type = new_type_method(unique_ident("calltype"),
727 n_parameters, n_res);
728 set_method_calling_convention(new_method_type,
729 get_method_calling_convention(ir_method_type));
730 set_method_additional_properties(new_method_type,
731 get_method_additional_properties(ir_method_type));
733 for(int i = 0; i < n_res; ++i) {
734 set_method_res_type(new_method_type, i,
735 get_method_res_type(ir_method_type, i));
738 ir_node *in[n_parameters];
740 argument = call->arguments;
742 for( ; argument != NULL; argument = argument->next) {
743 expression_t *expression = argument->expression;
744 ir_node *arg_node = expression_to_firm(expression);
747 if(new_method_type != NULL) {
748 ir_type *irtype = get_ir_type(expression->datatype);
749 set_method_param_type(new_method_type, n, irtype);
754 assert(n == n_parameters);
756 if(new_method_type != NULL)
757 ir_method_type = new_method_type;
759 dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
760 ir_node *store = get_store();
761 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
763 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
766 type_t *result_type = function_type->result_type;
767 ir_node *result = NULL;
768 if(result_type != type_void) {
769 ir_mode *mode = get_ir_mode(result_type);
770 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
771 result = new_d_Proj(dbgi, resproj, mode, 0);
777 static ir_node *expression_to_addr(const expression_t *expression);
778 static void create_condition_evaluation(const expression_t *expression,
780 ir_node *false_block);
782 static void set_value_for_expression(const expression_t *expression,
785 if(expression->type == EXPR_REFERENCE) {
786 reference_expression_t *ref = (reference_expression_t*) expression;
788 declaration_t *declaration = ref->declaration;
789 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
790 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
791 set_value(declaration->v.value_number, value);
796 dbg_info *dbgi = get_dbg_info(&expression->source_position);
797 ir_node *addr = expression_to_addr(expression);
798 assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
799 ir_node *memory = get_store();
800 ir_node *store = new_d_Store(dbgi, memory, addr, value);
801 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
802 set_store(store_mem);
805 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
807 ir_mode *value_mode = get_irn_mode(value);
809 if (value_mode == dest_mode || is_Bad(value))
812 if(dest_mode == mode_b) {
813 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
814 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
815 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
819 return new_d_Conv(dbgi, value, dest_mode);
822 static ir_node *create_incdec(const unary_expression_t *expression)
824 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
825 type_t *type = expression->expression.datatype;
826 ir_mode *mode = get_ir_mode(type);
827 expression_t *value = expression->value;
829 ir_node *value_node = expression_to_firm(value);
832 if(type->type == TYPE_POINTER) {
833 pointer_type_t *pointer_type = (pointer_type_t*) type;
834 unsigned elem_size = get_type_size(pointer_type->points_to);
835 offset = new_Const_long(mode_Is, elem_size);
837 assert(is_type_arithmetic(type));
838 offset = new_Const(mode, get_mode_one(mode));
842 switch(expression->type) {
843 case UNEXPR_POSTFIX_INCREMENT: {
844 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
845 set_value_for_expression(value, new_value);
848 case UNEXPR_POSTFIX_DECREMENT: {
849 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
850 set_value_for_expression(value, new_value);
853 case UNEXPR_PREFIX_INCREMENT: {
854 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
855 set_value_for_expression(value, new_value);
858 case UNEXPR_PREFIX_DECREMENT: {
859 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
860 set_value_for_expression(value, new_value);
864 panic("no incdec expr in create_incdec");
870 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
872 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
873 type_t *type = expression->expression.datatype;
875 if(expression->type == UNEXPR_TAKE_ADDRESS)
876 return expression_to_addr(expression->value);
878 const expression_t *value = expression->value;
879 ir_node *value_node = expression_to_firm(value);
881 switch(expression->type) {
883 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
886 case UNEXPR_BITWISE_NEGATE:
887 return new_d_Not(dbgi, value_node, get_ir_mode(type));
889 if(get_irn_mode(value_node) != mode_b) {
890 value_node = create_conv(dbgi, value_node, mode_b);
892 value_node = new_d_Not(dbgi, value_node, mode_b);
893 ir_mode *const mode = get_ir_mode(type);
895 value_node = create_conv(dbgi, value_node, mode);
899 case UNEXPR_DEREFERENCE:
900 return deref_address(type, value_node, dbgi);
901 case UNEXPR_POSTFIX_INCREMENT:
902 case UNEXPR_POSTFIX_DECREMENT:
903 case UNEXPR_PREFIX_INCREMENT:
904 case UNEXPR_PREFIX_DECREMENT:
905 return create_incdec(expression);
907 return create_conv(dbgi, value_node, get_ir_mode(type));
909 case UNEXPR_TAKE_ADDRESS:
913 panic("invalid UNEXPR type found");
916 static long get_pnc(binary_expression_type_t type)
919 case BINEXPR_EQUAL: return pn_Cmp_Eq;
920 case BINEXPR_NOTEQUAL: return pn_Cmp_Lg;
921 case BINEXPR_LESS: return pn_Cmp_Lt;
922 case BINEXPR_LESSEQUAL: return pn_Cmp_Le;
923 case BINEXPR_GREATER: return pn_Cmp_Gt;
924 case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
928 panic("trying to get pn_Cmp from non-comparison binexpr type");
931 static ir_node *create_lazy_op(const binary_expression_t *expression)
933 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
934 type_t *type = expression->expression.datatype;
935 ir_mode *mode = get_ir_mode(type);
937 ir_node *cur_block = get_cur_block();
939 ir_node *one_block = new_immBlock();
940 ir_node *one = new_Const(mode, get_mode_one(mode));
941 ir_node *jmp_one = new_d_Jmp(dbgi);
943 ir_node *zero_block = new_immBlock();
944 ir_node *zero = new_Const(mode, get_mode_null(mode));
945 ir_node *jmp_zero = new_d_Jmp(dbgi);
947 set_cur_block(cur_block);
948 create_condition_evaluation((const expression_t*) expression,
949 one_block, zero_block);
950 mature_immBlock(one_block);
951 mature_immBlock(zero_block);
953 ir_node *common_block = new_immBlock();
954 add_immBlock_pred(common_block, jmp_one);
955 add_immBlock_pred(common_block, jmp_zero);
956 mature_immBlock(common_block);
958 ir_node *in[2] = { one, zero };
959 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
964 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
965 ir_node *right, ir_mode *mode);
967 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
968 create_arithmetic_func func)
970 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
971 ir_node *left = expression_to_firm(expression->left);
972 ir_node *right = expression_to_firm(expression->right);
973 type_t *type = expression->right->datatype;
974 /* be careful with the modes, because in arithmetic assign nodes only
975 * the right operand has the mode of the arithmetic already */
976 ir_mode *mode = get_ir_mode(type);
977 left = create_conv(dbgi, left, mode);
978 ir_node *res = func(dbgi, left, right, mode);
983 static ir_node *pointer_arithmetic(ir_node *const pointer,
986 dbg_info *const dbgi,
987 const create_arithmetic_func func)
989 pointer_type_t *const pointer_type = (pointer_type_t*)type;
990 type_t *const points_to = pointer_type->points_to;
991 const unsigned elem_size = get_type_size(points_to);
993 assert(elem_size >= 1);
995 integer = create_conv(dbgi, integer, mode_Is);
996 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
997 ir_node *const mul = new_d_Mul(dbgi, integer, cnst, mode_Is);
1001 ir_mode *const mode = get_ir_mode(type);
1002 return func(dbgi, pointer, integer, mode);
1005 static ir_node *create_arithmetic_assign_binop(
1006 const binary_expression_t *expression, create_arithmetic_func func)
1008 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1009 type_t *const type = expression->expression.datatype;
1012 if (type->type == TYPE_POINTER) {
1013 ir_node *const pointer = expression_to_firm(expression->left);
1014 ir_node * integer = expression_to_firm(expression->right);
1015 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1017 value = create_arithmetic_binop(expression, func);
1020 ir_mode *const mode = get_ir_mode(type);
1021 value = create_conv(dbgi, value, mode);
1022 set_value_for_expression(expression->left, value);
1027 static ir_node *create_add(const binary_expression_t *expression)
1029 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1030 ir_node *left = expression_to_firm(expression->left);
1031 ir_node *right = expression_to_firm(expression->right);
1032 type_t *type = expression->expression.datatype;
1034 expression_t *expr_left = expression->left;
1035 expression_t *expr_right = expression->right;
1036 type_t *type_left = skip_typeref(expr_left->datatype);
1037 type_t *type_right = skip_typeref(expr_right->datatype);
1039 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1040 ir_mode *const mode = get_ir_mode(type);
1041 return new_d_Add(dbgi, left, right, mode);
1044 if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1045 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1047 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1048 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1052 static ir_node *create_sub(const binary_expression_t *expression)
1054 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1055 expression_t *const expr_left = expression->left;
1056 expression_t *const expr_right = expression->right;
1057 ir_node *const left = expression_to_firm(expr_left);
1058 ir_node *const right = expression_to_firm(expr_right);
1059 type_t *const type = expression->expression.datatype;
1060 type_t *const type_left = skip_typeref(expr_left->datatype);
1061 type_t *const type_right = skip_typeref(expr_right->datatype);
1063 if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
1064 (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER)) {
1065 ir_mode *const mode = get_ir_mode(type);
1066 return new_d_Sub(dbgi, left, right, mode);
1069 assert(type_left->type == TYPE_POINTER);
1070 return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1073 static ir_node *create_shift(const binary_expression_t *expression)
1075 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1076 ir_node *left = expression_to_firm(expression->left);
1077 ir_node *right = expression_to_firm(expression->right);
1078 type_t *type = expression->expression.datatype;
1079 ir_mode *mode = get_ir_mode(type);
1081 /* firm always wants the shift count to be unsigned */
1082 right = create_conv(dbgi, right, mode_Iu);
1086 switch(expression->type) {
1087 case BINEXPR_SHIFTLEFT:
1088 res = new_d_Shl(dbgi, left, right, mode);
1090 case BINEXPR_SHIFTRIGHT: {
1091 expression_t *expr_left = expression->left;
1092 type_t *type_left = skip_typeref(expr_left->datatype);
1094 if(is_type_signed(type_left)) {
1095 res = new_d_Shrs(dbgi, left, right, mode);
1097 res = new_d_Shr(dbgi, left, right, mode);
1102 panic("create shift op called for non-shift op");
1109 static ir_node *create_divmod(const binary_expression_t *expression)
1111 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1112 ir_node *left = expression_to_firm(expression->left);
1113 ir_node *right = expression_to_firm(expression->right);
1114 ir_node *pin = new_Pin(new_NoMem());
1115 type_t *type = expression->expression.datatype;
1116 ir_mode *mode = get_ir_mode(type);
1120 switch (expression->type) {
1122 case BINEXPR_DIV_ASSIGN:
1123 if(mode_is_float(mode)) {
1124 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1125 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1127 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1128 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1133 case BINEXPR_MOD_ASSIGN:
1134 assert(!mode_is_float(mode));
1135 op = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1136 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1139 default: panic("unexpected binary expression type in create_divmod()");
1145 static ir_node *create_arithmetic_assign_divmod(
1146 const binary_expression_t *expression)
1148 ir_node * value = create_divmod(expression);
1149 dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1150 type_t *const type = expression->expression.datatype;
1151 ir_mode *const mode = get_ir_mode(type);
1153 assert(type->type != TYPE_POINTER);
1155 value = create_conv(dbgi, value, mode);
1156 set_value_for_expression(expression->left, value);
1162 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1164 binary_expression_type_t type = expression->type;
1167 case BINEXPR_NOTEQUAL:
1169 case BINEXPR_LESSEQUAL:
1170 case BINEXPR_GREATER:
1171 case BINEXPR_GREATEREQUAL: {
1172 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1173 ir_node *left = expression_to_firm(expression->left);
1174 ir_node *right = expression_to_firm(expression->right);
1175 ir_node *cmp = new_d_Cmp(dbgi, left, right);
1176 long pnc = get_pnc(type);
1177 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
1180 case BINEXPR_ASSIGN: {
1181 ir_node *right = expression_to_firm(expression->right);
1182 set_value_for_expression(expression->left, right);
1186 return create_add(expression);
1188 return create_sub(expression);
1190 return create_arithmetic_binop(expression, new_d_Mul);
1191 case BINEXPR_BITWISE_AND:
1192 return create_arithmetic_binop(expression, new_d_And);
1193 case BINEXPR_BITWISE_OR:
1194 return create_arithmetic_binop(expression, new_d_Or);
1195 case BINEXPR_BITWISE_XOR:
1196 return create_arithmetic_binop(expression, new_d_Eor);
1197 case BINEXPR_SHIFTLEFT:
1198 case BINEXPR_SHIFTRIGHT:
1199 return create_shift(expression);
1202 return create_divmod(expression);
1203 case BINEXPR_LOGICAL_AND:
1204 case BINEXPR_LOGICAL_OR:
1205 return create_lazy_op(expression);
1207 expression_to_firm(expression->left);
1208 return expression_to_firm(expression->right);
1209 case BINEXPR_ADD_ASSIGN:
1210 return create_arithmetic_assign_binop(expression, new_d_Add);
1211 case BINEXPR_SUB_ASSIGN:
1212 return create_arithmetic_assign_binop(expression, new_d_Sub);
1213 case BINEXPR_MUL_ASSIGN:
1214 return create_arithmetic_assign_binop(expression, new_d_Mul);
1215 case BINEXPR_DIV_ASSIGN:
1216 return create_arithmetic_assign_divmod(expression);
1217 case BINEXPR_BITWISE_AND_ASSIGN:
1218 return create_arithmetic_assign_binop(expression, new_d_And);
1219 case BINEXPR_BITWISE_OR_ASSIGN:
1220 return create_arithmetic_assign_binop(expression, new_d_Or);
1221 case BINEXPR_BITWISE_XOR_ASSIGN:
1222 return create_arithmetic_assign_binop(expression, new_d_Eor);
1223 case BINEXPR_SHIFTLEFT_ASSIGN:
1224 return create_arithmetic_assign_binop(expression, new_d_Shl);
1225 case BINEXPR_SHIFTRIGHT_ASSIGN:
1226 return create_arithmetic_assign_binop(expression, new_d_Shr);
1228 panic("TODO binexpr type");
1232 static ir_node *array_access_addr(const array_access_expression_t *expression)
1234 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1236 ir_node *base_addr = expression_to_firm(expression->array_ref);
1237 ir_node *offset = expression_to_firm(expression->index);
1238 offset = create_conv(dbgi, offset, mode_Iu);
1240 unsigned elem_size = get_type_size(expression->expression.datatype);
1241 ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1242 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
1244 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1249 static ir_node *array_access_to_firm(
1250 const array_access_expression_t *expression)
1252 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1253 ir_node *addr = array_access_addr(expression);
1254 type_t *type = skip_typeref(expression->expression.datatype);
1255 return deref_address(type, addr, dbgi);
1258 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1260 type_t *type = expression->type;
1262 type = expression->size_expression->datatype;
1263 assert(type != NULL);
1266 ir_mode *mode = get_ir_mode(expression->expression.datatype);
1267 unsigned size = get_type_size(type);
1268 ir_node *size_node = new_Const_long(mode, size);
1273 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1275 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1277 ir_node *cur_block = get_cur_block();
1279 /* create the true block */
1280 ir_node *true_block = new_immBlock();
1282 ir_node *true_val = expression_to_firm(expression->true_expression);
1283 ir_node *true_jmp = new_Jmp();
1285 /* create the false block */
1286 ir_node *false_block = new_immBlock();
1288 ir_node *false_val = expression_to_firm(expression->false_expression);
1289 ir_node *false_jmp = new_Jmp();
1291 /* create the condition evaluation */
1292 set_cur_block(cur_block);
1293 create_condition_evaluation(expression->condition, true_block, false_block);
1294 mature_immBlock(true_block);
1295 mature_immBlock(false_block);
1297 /* create the common block */
1298 ir_node *common_block = new_immBlock();
1299 add_immBlock_pred(common_block, true_jmp);
1300 add_immBlock_pred(common_block, false_jmp);
1301 mature_immBlock(common_block);
1303 ir_node *in[2] = { true_val, false_val };
1304 ir_mode *mode = get_irn_mode(true_val);
1305 assert(get_irn_mode(false_val) == mode);
1306 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
1311 static ir_node *select_addr(const select_expression_t *expression)
1313 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1315 ir_node *compound_addr = expression_to_firm(expression->compound);
1317 declaration_t *entry = expression->compound_entry;
1318 assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1319 ir_entity *entity = entry->v.entity;
1321 assert(entity != NULL);
1323 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1328 static ir_node *select_to_firm(const select_expression_t *expression)
1330 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1331 ir_node *addr = select_addr(expression);
1332 type_t *type = skip_typeref(expression->expression.datatype);
1333 return deref_address(type, addr, dbgi);
1336 /* Values returned by __builtin_classify_type. */
1337 typedef enum gcc_type_class
1343 enumeral_type_class,
1346 reference_type_class,
1350 function_type_class,
1361 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1363 const type_t *const type = expr->type_expression->datatype;
1369 const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1370 switch (atomic_type->atype) {
1371 // should not be reached
1372 case ATOMIC_TYPE_INVALID:
1376 // gcc cannot do that
1377 case ATOMIC_TYPE_VOID:
1378 tc = void_type_class;
1381 case ATOMIC_TYPE_CHAR: // gcc handles this as integer
1382 case ATOMIC_TYPE_SCHAR: // gcc handles this as integer
1383 case ATOMIC_TYPE_UCHAR: // gcc handles this as integer
1384 case ATOMIC_TYPE_SHORT:
1385 case ATOMIC_TYPE_USHORT:
1386 case ATOMIC_TYPE_INT:
1387 case ATOMIC_TYPE_UINT:
1388 case ATOMIC_TYPE_LONG:
1389 case ATOMIC_TYPE_ULONG:
1390 case ATOMIC_TYPE_LONGLONG:
1391 case ATOMIC_TYPE_ULONGLONG:
1392 case ATOMIC_TYPE_BOOL: // gcc handles this as integer
1393 tc = integer_type_class;
1396 case ATOMIC_TYPE_FLOAT:
1397 case ATOMIC_TYPE_DOUBLE:
1398 case ATOMIC_TYPE_LONG_DOUBLE:
1399 tc = real_type_class;
1402 #ifdef PROVIDE_COMPLEX
1403 case ATOMIC_TYPE_FLOAT_COMPLEX:
1404 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1405 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1406 tc = complex_type_class;
1410 #ifdef PROVIDE_IMAGINARY
1411 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1412 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1413 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1414 tc = complex_type_class;
1419 panic("Unimplemented case in classify_type_to_firm().");
1424 case TYPE_ARRAY: // gcc handles this as pointer
1425 case TYPE_FUNCTION: // gcc handles this as pointer
1426 case TYPE_POINTER: tc = pointer_type_class; break;
1427 case TYPE_COMPOUND_STRUCT: tc = record_type_class; break;
1428 case TYPE_COMPOUND_UNION: tc = union_type_class; break;
1430 // gcc handles this as integer
1431 case TYPE_ENUM: tc = integer_type_class; break;
1434 panic("Unimplemented case in classify_type_to_firm().");
1437 dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1438 ir_mode *const mode = mode_Is;
1439 tarval *const tv = new_tarval_from_long(tc, mode);
1440 return new_d_Const(dbgi, mode, tv);
1443 static ir_node *dereference_addr(const unary_expression_t *const expression)
1445 assert(expression->type == UNEXPR_DEREFERENCE);
1446 return expression_to_firm(expression->value);
1449 static ir_node *expression_to_addr(const expression_t *expression)
1451 switch(expression->type) {
1452 case EXPR_REFERENCE:
1453 return reference_addr((const reference_expression_t*) expression);
1454 case EXPR_ARRAY_ACCESS:
1455 return array_access_addr((const array_access_expression_t*) expression);
1457 return select_addr((const select_expression_t*) expression);
1459 const unary_expression_t *const unary_expr =
1460 (const unary_expression_t*)expression;
1461 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1462 return dereference_addr(unary_expr);
1469 panic("trying to get address of non-lvalue");
1472 static ir_node *_expression_to_firm(const expression_t *expression)
1474 switch(expression->type) {
1476 return const_to_firm((const const_t*) expression);
1477 case EXPR_STRING_LITERAL:
1478 return string_literal_to_firm((const string_literal_t*) expression);
1479 case EXPR_REFERENCE:
1480 return reference_expression_to_firm(
1481 (const reference_expression_t*) expression);
1483 return call_expression_to_firm((const call_expression_t*) expression);
1485 return unary_expression_to_firm((const unary_expression_t*) expression);
1487 return binary_expression_to_firm(
1488 (const binary_expression_t*) expression);
1489 case EXPR_ARRAY_ACCESS:
1490 return array_access_to_firm(
1491 (const array_access_expression_t*) expression);
1493 return sizeof_to_firm((const sizeof_expression_t*) expression);
1494 case EXPR_CONDITIONAL:
1495 return conditional_to_firm((const conditional_expression_t*)expression);
1497 return select_to_firm((const select_expression_t*) expression);
1498 case EXPR_CLASSIFY_TYPE:
1499 return classify_type_to_firm((const classify_type_expression_t*)expression);
1502 case EXPR_PRETTY_FUNCTION:
1504 case EXPR_STATEMENT:
1505 case EXPR_BUILTIN_SYMBOL:
1506 panic("unimplemented expression found");
1512 panic("invalid expression found");
1515 static ir_node *expression_to_firm(const expression_t *expression)
1517 ir_node *res = _expression_to_firm(expression);
1519 if(res != NULL && get_irn_mode(res) == mode_b) {
1520 ir_mode *mode = get_ir_mode(expression->datatype);
1521 res = create_conv(NULL, res, mode);
1527 static ir_node *expression_to_modeb(const expression_t *expression)
1529 ir_node *res = _expression_to_firm(expression);
1530 res = create_conv(NULL, res, mode_b);
1536 * create a short-circuit expression evaluation that tries to construct
1537 * efficient control flow structures for &&, || and ! expressions
1539 static void create_condition_evaluation(const expression_t *expression,
1540 ir_node *true_block,
1541 ir_node *false_block)
1543 switch(expression->type) {
1545 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1546 if(unary_expression->type == UNEXPR_NOT) {
1547 create_condition_evaluation(unary_expression->value, false_block,
1554 binary_expression_t *binary_expression
1555 = (binary_expression_t*) expression;
1556 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1557 ir_node *cur_block = get_cur_block();
1558 ir_node *extra_block = new_immBlock();
1559 set_cur_block(cur_block);
1560 create_condition_evaluation(binary_expression->left, extra_block,
1562 mature_immBlock(extra_block);
1563 set_cur_block(extra_block);
1564 create_condition_evaluation(binary_expression->right, true_block,
1568 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1569 ir_node *cur_block = get_cur_block();
1570 ir_node *extra_block = new_immBlock();
1571 set_cur_block(cur_block);
1572 create_condition_evaluation(binary_expression->left, true_block,
1574 mature_immBlock(extra_block);
1575 set_cur_block(extra_block);
1576 create_condition_evaluation(binary_expression->right, true_block,
1586 dbg_info *dbgi = get_dbg_info(&expression->source_position);
1587 ir_node *condition = expression_to_modeb(expression);
1588 ir_node *cond = new_d_Cond(dbgi, condition);
1589 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1590 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1592 add_immBlock_pred(true_block, true_proj);
1593 add_immBlock_pred(false_block, false_proj);
1595 set_cur_block(NULL);
1598 static void statement_to_firm(statement_t *statement);
1600 static void return_statement_to_firm(return_statement_t *statement)
1602 if(get_cur_block() == NULL)
1605 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1608 if(statement->return_value != NULL) {
1609 ir_node *retval = expression_to_firm(statement->return_value);
1613 ret = new_d_Return(dbgi, get_store(), 1, in);
1615 ret = new_d_Return(dbgi, get_store(), 0, NULL);
1617 ir_node *end_block = get_irg_end_block(current_ir_graph);
1618 add_immBlock_pred(end_block, ret);
1620 set_cur_block(NULL);
1623 static void compound_statement_to_firm(compound_statement_t *compound)
1625 statement_t *statement = compound->statements;
1626 for( ; statement != NULL; statement = statement->next) {
1627 //context2firm(&statement->context);
1628 statement_to_firm(statement);
1632 static void expression_statement_to_firm(expression_statement_t *statement)
1634 if(get_cur_block() == NULL)
1637 expression_to_firm(statement->expression);
1640 static void if_statement_to_firm(if_statement_t *statement)
1642 ir_node *cur_block = get_cur_block();
1644 ir_node *fallthrough_block = new_immBlock();
1646 /* the true (blocks) */
1647 ir_node *true_block;
1648 if (statement->true_statement != NULL) {
1649 true_block = new_immBlock();
1650 statement_to_firm(statement->true_statement);
1651 if(get_cur_block() != NULL) {
1652 ir_node *jmp = new_Jmp();
1653 add_immBlock_pred(fallthrough_block, jmp);
1656 true_block = fallthrough_block;
1659 /* the false (blocks) */
1660 ir_node *false_block;
1661 if(statement->false_statement != NULL) {
1662 false_block = new_immBlock();
1664 statement_to_firm(statement->false_statement);
1665 if(get_cur_block() != NULL) {
1666 ir_node *jmp = new_Jmp();
1667 add_immBlock_pred(fallthrough_block, jmp);
1670 false_block = fallthrough_block;
1673 /* create the condition */
1674 if(cur_block != NULL) {
1675 set_cur_block(cur_block);
1676 create_condition_evaluation(statement->condition, true_block,
1680 mature_immBlock(true_block);
1681 if(false_block != fallthrough_block) {
1682 mature_immBlock(false_block);
1684 mature_immBlock(fallthrough_block);
1686 set_cur_block(fallthrough_block);
1689 static void while_statement_to_firm(while_statement_t *statement)
1691 ir_node *jmp = NULL;
1692 if(get_cur_block() != NULL) {
1696 /* create the header block */
1697 ir_node *header_block = new_immBlock();
1699 add_immBlock_pred(header_block, jmp);
1702 /* the false block */
1703 ir_node *false_block = new_immBlock();
1706 ir_node *body_block;
1707 if (statement->body != NULL) {
1708 ir_node *old_continue_label = continue_label;
1709 ir_node *old_break_label = break_label;
1710 continue_label = header_block;
1711 break_label = false_block;
1713 body_block = new_immBlock();
1714 statement_to_firm(statement->body);
1716 assert(continue_label == header_block);
1717 assert(break_label == false_block);
1718 continue_label = old_continue_label;
1719 break_label = old_break_label;
1721 if(get_cur_block() != NULL) {
1722 ir_node *jmp = new_Jmp();
1723 add_immBlock_pred(header_block, jmp);
1726 body_block = header_block;
1729 /* create the condition */
1730 set_cur_block(header_block);
1732 create_condition_evaluation(statement->condition, body_block, false_block);
1733 mature_immBlock(body_block);
1734 mature_immBlock(false_block);
1735 mature_immBlock(header_block);
1737 set_cur_block(false_block);
1740 static void do_while_statement_to_firm(do_while_statement_t *statement)
1742 ir_node *jmp = NULL;
1743 if(get_cur_block() != NULL) {
1747 /* create the header block */
1748 ir_node *header_block = new_immBlock();
1750 /* the false block */
1751 ir_node *false_block = new_immBlock();
1754 ir_node *body_block = new_immBlock();
1756 add_immBlock_pred(body_block, jmp);
1759 if (statement->body != NULL) {
1760 ir_node *old_continue_label = continue_label;
1761 ir_node *old_break_label = break_label;
1762 continue_label = header_block;
1763 break_label = false_block;
1765 statement_to_firm(statement->body);
1767 assert(continue_label == header_block);
1768 assert(break_label == false_block);
1769 continue_label = old_continue_label;
1770 break_label = old_break_label;
1772 if (get_cur_block() == NULL) {
1773 mature_immBlock(header_block);
1774 mature_immBlock(body_block);
1775 mature_immBlock(false_block);
1780 ir_node *body_jmp = new_Jmp();
1781 add_immBlock_pred(header_block, body_jmp);
1782 mature_immBlock(header_block);
1784 /* create the condition */
1785 set_cur_block(header_block);
1787 create_condition_evaluation(statement->condition, body_block, false_block);
1788 mature_immBlock(body_block);
1789 mature_immBlock(false_block);
1790 mature_immBlock(header_block);
1792 set_cur_block(false_block);
1795 static void for_statement_to_firm(for_statement_t *statement)
1797 ir_node *jmp = NULL;
1798 if (get_cur_block() != NULL) {
1799 if(statement->initialisation != NULL) {
1800 expression_to_firm(statement->initialisation);
1805 /* create the step block */
1806 ir_node *const step_block = new_immBlock();
1807 if (statement->step != NULL) {
1808 expression_to_firm(statement->step);
1810 ir_node *const step_jmp = new_Jmp();
1812 /* create the header block */
1813 ir_node *const header_block = new_immBlock();
1815 add_immBlock_pred(header_block, jmp);
1817 add_immBlock_pred(header_block, step_jmp);
1819 /* the false block */
1820 ir_node *const false_block = new_immBlock();
1823 ir_node * body_block;
1824 if (statement->body != NULL) {
1825 ir_node *const old_continue_label = continue_label;
1826 ir_node *const old_break_label = break_label;
1827 continue_label = step_block;
1828 break_label = false_block;
1830 body_block = new_immBlock();
1831 statement_to_firm(statement->body);
1833 assert(continue_label == step_block);
1834 assert(break_label == false_block);
1835 continue_label = old_continue_label;
1836 break_label = old_break_label;
1838 if (get_cur_block() != NULL) {
1839 ir_node *const jmp = new_Jmp();
1840 add_immBlock_pred(step_block, jmp);
1843 body_block = step_block;
1846 /* create the condition */
1847 set_cur_block(header_block);
1848 if (statement->condition != NULL) {
1849 create_condition_evaluation(statement->condition, body_block,
1852 keep_alive(header_block);
1853 ir_node *jmp = new_Jmp();
1854 add_immBlock_pred(body_block, jmp);
1857 mature_immBlock(body_block);
1858 mature_immBlock(false_block);
1859 mature_immBlock(step_block);
1860 mature_immBlock(header_block);
1861 mature_immBlock(false_block);
1863 set_cur_block(false_block);
1866 static void create_declaration_entity(declaration_t *declaration,
1867 declaration_type_t declaration_type,
1868 ir_type *parent_type)
1870 ident *id = new_id_from_str(declaration->symbol->string);
1871 ir_type *irtype = get_ir_type(declaration->type);
1872 ir_entity *entity = new_entity(parent_type, id, irtype);
1873 set_entity_ld_ident(entity, id);
1875 declaration->declaration_type = declaration_type;
1876 declaration->v.entity = entity;
1877 set_entity_variability(entity, variability_uninitialized);
1878 /* TODO: visibility? */
1881 static void create_initializer(declaration_t *declaration)
1883 initializer_t *initializer = declaration->init.initializer;
1884 if(initializer == NULL)
1887 if(initializer->type == INITIALIZER_VALUE) {
1888 initializer_value_t *value = (initializer_value_t*) initializer;
1890 ir_node *init_node = expression_to_firm(value->value);
1892 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1893 set_value(declaration->v.value_number, init_node);
1895 ir_entity *entity = declaration->v.entity;
1897 set_entity_variability(entity, variability_initialized);
1898 set_atomic_ent_value(entity, init_node);
1901 assert(initializer->type == INITIALIZER_LIST);
1902 panic("list initializer not supported yet");
1906 static void create_local_variable(declaration_t *declaration)
1908 assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1910 bool needs_entity = declaration->address_taken;
1911 type_t *type = skip_typeref(declaration->type);
1913 if(type->type == TYPE_ARRAY
1914 || type->type == TYPE_COMPOUND_STRUCT
1915 || type->type == TYPE_COMPOUND_UNION) {
1916 needs_entity = true;
1920 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1921 create_declaration_entity(declaration,
1922 DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1925 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1926 declaration->v.value_number = next_value_number_function;
1927 ++next_value_number_function;
1930 create_initializer(declaration);
1933 static void declaration_statement_to_firm(declaration_statement_t *statement)
1935 declaration_t *declaration = statement->declarations_begin;
1936 declaration_t *end = statement->declarations_end->next;
1937 for( ; declaration != end; declaration = declaration->next) {
1938 type_t *type = declaration->type;
1940 switch(declaration->storage_class) {
1941 case STORAGE_CLASS_TYPEDEF:
1943 case STORAGE_CLASS_STATIC:
1944 panic("static local vars not implemented yet");
1945 case STORAGE_CLASS_ENUM_ENTRY:
1946 panic("enum entry declaration in local block found");
1947 case STORAGE_CLASS_EXTERN:
1948 panic("extern declaration in local block found");
1949 case STORAGE_CLASS_NONE:
1950 case STORAGE_CLASS_AUTO:
1951 case STORAGE_CLASS_REGISTER:
1952 if(type->type == TYPE_FUNCTION) {
1953 panic("nested functions not supported yet");
1955 create_local_variable(declaration);
1959 panic("invalid storage class found");
1963 static void create_jump_statement(const statement_t *statement,
1964 ir_node *target_block)
1966 if(get_cur_block() == NULL)
1969 dbg_info *dbgi = get_dbg_info(&statement->source_position);
1970 ir_node *jump = new_d_Jmp(dbgi);
1971 add_immBlock_pred(target_block, jump);
1973 set_cur_block(NULL);
1976 static void switch_statement_to_firm(const switch_statement_t *statement)
1978 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1980 ir_node *expression = expression_to_firm(statement->expression);
1981 ir_node *cond = new_d_Cond(dbgi, expression);
1982 ir_node *break_block = new_immBlock();
1984 set_cur_block(NULL);
1986 ir_node *const old_switch_cond = current_switch_cond;
1987 ir_node *const old_break_label = break_label;
1988 const bool old_saw_default_label = saw_default_label;
1989 current_switch_cond = cond;
1990 break_label = break_block;
1992 statement_to_firm(statement->body);
1994 if(get_cur_block() != NULL) {
1995 ir_node *jmp = new_Jmp();
1996 add_immBlock_pred(break_block, jmp);
1999 if (!saw_default_label) {
2000 set_cur_block(get_nodes_block(cond));
2001 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2002 MAGIC_DEFAULT_PN_NUMBER);
2003 add_immBlock_pred(break_block, proj);
2006 assert(current_switch_cond == cond);
2007 assert(break_label == break_block);
2008 current_switch_cond = old_switch_cond;
2009 break_label = old_break_label;
2010 saw_default_label = old_saw_default_label;
2012 mature_immBlock(break_block);
2013 set_cur_block(break_block);
2016 static long fold_constant(const expression_t *expression)
2018 ir_graph *old_current_ir_graph = current_ir_graph;
2019 current_ir_graph = get_const_code_irg();
2021 ir_node *cnst = expression_to_firm(expression);
2022 if(!is_Const(cnst)) {
2023 panic("couldn't fold constantl");
2025 tarval *tv = get_Const_tarval(cnst);
2026 if(!tarval_is_long(tv)) {
2027 panic("folded constant not an integer");
2030 long res = get_tarval_long(tv);
2032 current_ir_graph = old_current_ir_graph;
2036 static void case_label_to_firm(const case_label_statement_t *statement)
2038 dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2040 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2042 /* let's create a node and hope firm constant folding creates a Const
2045 set_cur_block(get_nodes_block(current_switch_cond));
2046 if(statement->expression) {
2047 long pn = fold_constant(statement->expression);
2048 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2049 /* oops someone detected our cheating... */
2050 panic("magic default pn used");
2052 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2054 saw_default_label = true;
2055 proj = new_d_defaultProj(dbgi, current_switch_cond,
2056 MAGIC_DEFAULT_PN_NUMBER);
2059 ir_node *block = new_immBlock();
2060 if (fallthrough != NULL) {
2061 add_immBlock_pred(block, fallthrough);
2063 add_immBlock_pred(block, proj);
2064 mature_immBlock(block);
2067 static ir_node *get_label_block(declaration_t *label)
2069 assert(label->namespc == NAMESPACE_LABEL);
2071 if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2072 return label->v.block;
2074 assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2076 ir_node *old_cur_block = get_cur_block();
2077 ir_node *block = new_immBlock();
2078 set_cur_block(old_cur_block);
2080 label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2081 label->v.block = block;
2083 ARR_APP1(ir_node *, imature_blocks, block);
2088 static void label_to_firm(const label_statement_t *statement)
2090 ir_node *block = get_label_block(statement->label);
2092 if(get_cur_block() != NULL) {
2093 ir_node *jmp = new_Jmp();
2094 add_immBlock_pred(block, jmp);
2097 set_cur_block(block);
2100 statement_to_firm(statement->label_statement);
2103 static void goto_to_firm(const goto_statement_t *statement)
2105 if(get_cur_block() == NULL)
2108 ir_node *block = get_label_block(statement->label);
2109 ir_node *jmp = new_Jmp();
2110 add_immBlock_pred(block, jmp);
2112 set_cur_block(NULL);
2115 static void statement_to_firm(statement_t *statement)
2117 switch(statement->type) {
2118 case STATEMENT_COMPOUND:
2119 compound_statement_to_firm((compound_statement_t*) statement);
2121 case STATEMENT_RETURN:
2122 return_statement_to_firm((return_statement_t*) statement);
2124 case STATEMENT_EXPRESSION:
2125 expression_statement_to_firm((expression_statement_t*) statement);
2128 if_statement_to_firm((if_statement_t*) statement);
2130 case STATEMENT_WHILE:
2131 while_statement_to_firm((while_statement_t*) statement);
2133 case STATEMENT_DO_WHILE:
2134 do_while_statement_to_firm((do_while_statement_t*) statement);
2136 case STATEMENT_DECLARATION:
2137 declaration_statement_to_firm((declaration_statement_t*) statement);
2139 case STATEMENT_BREAK:
2140 create_jump_statement(statement, break_label);
2142 case STATEMENT_CONTINUE:
2143 create_jump_statement(statement, continue_label);
2145 case STATEMENT_SWITCH:
2146 switch_statement_to_firm((switch_statement_t*) statement);
2148 case STATEMENT_CASE_LABEL:
2149 case_label_to_firm((case_label_statement_t*) statement);
2152 for_statement_to_firm((for_statement_t*) statement);
2154 case STATEMENT_LABEL:
2155 label_to_firm((label_statement_t*) statement);
2157 case STATEMENT_GOTO:
2158 goto_to_firm((goto_statement_t*) statement);
2163 panic("Statement not implemented\n");
2166 static int count_local_declarations(const declaration_t * decl,
2167 const declaration_t *const end)
2170 for (; decl != end; decl = decl->next) {
2171 const type_t *type = skip_typeref(decl->type);
2172 switch (type->type) {
2176 if (!decl->address_taken) ++count;
2185 static int count_decls_in_stmts(const statement_t *stmt)
2188 for (; stmt != NULL; stmt = stmt->next) {
2189 switch (stmt->type) {
2190 case STATEMENT_DECLARATION: {
2191 const declaration_statement_t *const decl_stmt =
2192 (const declaration_statement_t*)stmt;
2193 count += count_local_declarations(decl_stmt->declarations_begin,
2194 decl_stmt->declarations_end->next);
2198 case STATEMENT_COMPOUND: {
2199 const compound_statement_t *const comp =
2200 (const compound_statement_t*)stmt;
2201 count += count_decls_in_stmts(comp->statements);
2205 case STATEMENT_IF: {
2206 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2207 count += count_decls_in_stmts(if_stmt->true_statement);
2208 count += count_decls_in_stmts(if_stmt->false_statement);
2212 case STATEMENT_SWITCH: {
2213 const switch_statement_t *const switch_stmt =
2214 (const switch_statement_t*)stmt;
2215 count += count_decls_in_stmts(switch_stmt->body);
2219 case STATEMENT_LABEL: {
2220 const label_statement_t *const label_stmt =
2221 (const label_statement_t*)stmt;
2222 count += count_decls_in_stmts(label_stmt->label_statement);
2226 case STATEMENT_WHILE: {
2227 const while_statement_t *const while_stmt =
2228 (const while_statement_t*)stmt;
2229 count += count_decls_in_stmts(while_stmt->body);
2233 case STATEMENT_DO_WHILE: {
2234 const do_while_statement_t *const do_while_stmt =
2235 (const do_while_statement_t*)stmt;
2236 count += count_decls_in_stmts(do_while_stmt->body);
2240 case STATEMENT_FOR: {
2241 const for_statement_t *const for_stmt =
2242 (const for_statement_t*)stmt;
2243 /* TODO initialisation */
2244 count += count_decls_in_stmts(for_stmt->body);
2248 case STATEMENT_BREAK:
2249 case STATEMENT_CASE_LABEL:
2250 case STATEMENT_CONTINUE:
2251 case STATEMENT_EXPRESSION:
2252 case STATEMENT_GOTO:
2253 case STATEMENT_INVALID:
2254 case STATEMENT_RETURN:
2261 static int get_function_n_local_vars(declaration_t *declaration)
2265 /* count parameters */
2266 count += count_local_declarations(declaration->context.declarations, NULL);
2268 /* count local variables declared in body */
2269 count += count_decls_in_stmts(declaration->init.statement);
2274 static void initialize_function_parameters(declaration_t *declaration)
2276 ir_graph *irg = current_ir_graph;
2277 ir_node *args = get_irg_args(irg);
2278 ir_node *start_block = get_irg_start_block(irg);
2281 declaration_t *parameter = declaration->context.declarations;
2282 for( ; parameter != NULL; parameter = parameter->next) {
2283 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2284 type_t *type = parameter->type;
2286 bool needs_entity = parameter->address_taken;
2287 if(type->type == TYPE_COMPOUND_STRUCT
2288 || type->type == TYPE_COMPOUND_UNION) {
2289 needs_entity = true;
2293 panic("entities for function parameters not implemented yet");
2296 ir_mode *mode = get_ir_mode(parameter->type);
2298 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2301 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2302 parameter->v.value_number = next_value_number_function;
2303 ++next_value_number_function;
2305 set_value(parameter->v.value_number, proj);
2309 static void create_function(declaration_t *declaration)
2311 ir_entity *entity = get_function_entity(declaration);
2313 if(declaration->init.statement == NULL)
2316 assert(imature_blocks == NULL);
2317 imature_blocks = NEW_ARR_F(ir_node*, 0);
2319 int n_local_vars = get_function_n_local_vars(declaration);
2320 ir_graph *irg = new_ir_graph(entity, n_local_vars);
2321 ir_node *first_block = get_cur_block();
2323 next_value_number_function = 0;
2324 initialize_function_parameters(declaration);
2326 statement_to_firm(declaration->init.statement);
2328 ir_node *end_block = get_irg_end_block(irg);
2330 /* do we have a return statement yet? */
2331 if(get_cur_block() != NULL) {
2332 assert(declaration->type->type == TYPE_FUNCTION);
2333 const function_type_t* const func_type
2334 = (const function_type_t*) declaration->type;
2336 if (func_type->result_type == type_void) {
2337 ret = new_Return(get_store(), 0, NULL);
2339 ir_mode *const mode = get_ir_mode(func_type->result_type);
2341 // ยง5.1.2.2.3 main implicitly returns 0
2342 if (strcmp(declaration->symbol->string, "main") == 0) {
2343 in[0] = new_Const(mode, get_mode_null(mode));
2345 in[0] = new_Unknown(mode);
2347 ret = new_Return(get_store(), 1, in);
2349 add_immBlock_pred(end_block, ret);
2352 for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2353 mature_immBlock(imature_blocks[i]);
2355 DEL_ARR_F(imature_blocks);
2356 imature_blocks = NULL;
2358 mature_immBlock(first_block);
2359 mature_immBlock(end_block);
2361 irg_finalize_cons(irg);
2363 /* finalize the frame type */
2364 ir_type *frame_type = get_irg_frame_type(irg);
2365 int n = get_compound_n_members(frame_type);
2368 for(int i = 0; i < n; ++i) {
2369 ir_entity *entity = get_compound_member(frame_type, i);
2370 ir_type *entity_type = get_entity_type(entity);
2372 int align = get_type_alignment_bytes(entity_type);
2373 if(align > align_all)
2377 misalign = offset % align;
2381 set_entity_offset(entity, offset);
2382 offset += get_type_size_bytes(entity_type);
2384 set_type_size_bytes(frame_type, offset);
2385 set_type_alignment_bytes(frame_type, align_all);
2386 set_type_state(frame_type, layout_fixed);
2391 static void create_global_variable(declaration_t *declaration)
2393 ir_type *global_type = get_glob_type();
2394 create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2397 ir_entity *entity = declaration->v.entity;
2398 if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2399 set_entity_visibility(entity, visibility_local);
2400 } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2401 set_entity_visibility(entity, visibility_external_allocated);
2403 set_entity_visibility(entity, visibility_external_visible);
2405 current_ir_graph = get_const_code_irg();
2406 create_initializer(declaration);
2409 static void context_to_firm(context_t *context)
2411 declaration_t *declaration = context->declarations;
2412 for( ; declaration != NULL; declaration = declaration->next) {
2413 if(declaration->namespc != NAMESPACE_NORMAL)
2415 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2416 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2418 if(declaration->symbol == NULL)
2421 type_t *type = declaration->type;
2422 if(type->type == TYPE_FUNCTION) {
2423 create_function(declaration);
2425 create_global_variable(declaration);
2430 void translation_unit_to_firm(translation_unit_t *unit)
2432 /* remove me later TODO FIXME */
2433 (void) get_type_size;
2435 /* just to be sure */
2436 continue_label = NULL;
2438 current_switch_cond = NULL;
2440 context_to_firm(& unit->context);