X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast2firm.c;h=035b793f75ce41615881bc2e985f982aa57d31bc;hb=66b3151d6ecdd2d8958d0bb1cbe8e92f2ac5000f;hp=2a40532aae9741b3008e5a9dc3fb55699feee843;hpb=e5f4aaa472b9e1eefbbd5e786609549ce1d94820;p=cparser diff --git a/ast2firm.c b/ast2firm.c index 2a40532..035b793 100644 --- a/ast2firm.c +++ b/ast2firm.c @@ -25,6 +25,7 @@ #include #include +#include #include "ast2firm.h" @@ -38,11 +39,11 @@ #include "diagnostic.h" #include "lang_features.h" #include "types.h" +#include "warning.h" +#include "entitymap_t.h" #include "driver/firm_opt.h" #include "driver/firm_cmdline.h" -#define MAGIC_DEFAULT_PN_NUMBER (long) -314159265 - /* some idents needed for name mangling */ static ident *id_underscore; static ident *id_imp; @@ -52,18 +53,20 @@ static ir_type *ir_type_wchar_t; static ir_type *ir_type_void; static ir_type *ir_type_int; -static type_t *type_const_char; - static int next_value_number_function; static ir_node *continue_label; static ir_node *break_label; static ir_node *current_switch_cond; static bool saw_default_label; static ir_node **imature_blocks; +static bool constant_folding; static const declaration_t *current_function_decl; static ir_node *current_function_name; static ir_node *current_funcsig; +static switch_statement_t *current_switch; + +static entitymap_t entitymap; static struct obstack asm_obst; @@ -78,7 +81,8 @@ typedef enum declaration_kind_t { DECLARATION_KIND_LABEL_BLOCK, DECLARATION_KIND_ENUM_ENTRY, DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE, - DECLARATION_KIND_COMPOUND_TYPE_COMPLETE + DECLARATION_KIND_COMPOUND_TYPE_COMPLETE, + DECLARATION_KIND_TYPE } declaration_kind_t; static ir_type *get_ir_type(type_t *type); @@ -89,16 +93,18 @@ ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos) { const declaration_t *declaration = get_irg_loc_description(irg, pos); - warningf(&declaration->source_position, - "variable '%#T' might be used uninitialized", - declaration->type, declaration->symbol); + if (declaration != NULL) { + warningf(&declaration->source_position, + "variable '%#T' might be used uninitialized", + declaration->type, declaration->symbol); + } return new_r_Unknown(irg, mode); } unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg) { const source_position_t *pos = (const source_position_t*) dbg; - if(pos == NULL) + if (pos == NULL) return 0; return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name, pos->linenr); @@ -107,9 +113,9 @@ unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg) const char *dbg_retrieve(const dbg_info *dbg, unsigned *line) { const source_position_t *pos = (const source_position_t*) dbg; - if(pos == NULL) + if (pos == NULL) return NULL; - if(line != NULL) + if (line != NULL) *line = pos->linenr; return pos->input_name; } @@ -123,23 +129,25 @@ static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1]; static ir_mode *mode_int, *mode_uint; +static ir_node *_expression_to_firm(const expression_t *expression); static ir_node *expression_to_firm(const expression_t *expression); static inline ir_mode *get_ir_mode(type_t *type); +static void create_local_declaration(declaration_t *declaration); static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind) { unsigned flags = get_atomic_type_flags(kind); unsigned size = get_atomic_type_size(kind); - if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT)) + if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT)) && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) { char name[64]; - mode_sort sort; + ir_mode_sort sort; unsigned bit_size = size * 8; bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0; - mode_arithmetic arithmetic; + ir_mode_arithmetic arithmetic; unsigned modulo_shift; - if(flags & ATOMIC_TYPE_FLAG_INTEGER) { + if (flags & ATOMIC_TYPE_FLAG_INTEGER) { assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT)); snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size); sort = irms_int_number; @@ -175,10 +183,10 @@ static void init_atomic_modes(void) /* initialize pointer modes */ char name[64]; - mode_sort sort = irms_reference; + ir_mode_sort sort = irms_reference; unsigned bit_size = machine_size; bool is_signed = 0; - mode_arithmetic arithmetic = irma_twos_complement; + ir_mode_arithmetic arithmetic = irma_twos_complement; unsigned modulo_shift = bit_size < machine_size ? machine_size : bit_size; @@ -210,11 +218,9 @@ static unsigned get_array_type_size(array_type_t *type) static unsigned get_type_size_const(type_t *type) { - type = skip_typeref(type); - switch(type->kind) { case TYPE_ERROR: - panic("error type occured"); + panic("error type occurred"); case TYPE_ATOMIC: return get_atomic_type_size(type->atomic.akind); case TYPE_COMPLEX: @@ -249,9 +255,9 @@ static ir_node *get_type_size(type_t *type) { type = skip_typeref(type); - if(is_type_array(type) && type->array.is_vla) { + if (is_type_array(type) && type->array.is_vla) { ir_node *size_node = type->array.size_node; - if(size_node == NULL) { + if (size_node == NULL) { size_node = expression_to_firm(type->array.size_expression); assert(!is_Const(size_node)); type->array.size_node = size_node; @@ -330,6 +336,21 @@ static ir_type *create_imaginary_type(const imaginary_type_t *type) return irtype; } +/** + * return type of a parameter (and take transparent union gnu extension into + * account) + */ +static type_t *get_parameter_type(type_t *type) +{ + type = skip_typeref(type); + if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) { + declaration_t *decl = type->compound.declaration; + type = decl->scope.declarations->type; + } + + return type; +} + static ir_type *create_method_type(const function_type_t *function_type) { type_t *return_type = function_type->return_type; @@ -340,23 +361,52 @@ static ir_type *create_method_type(const function_type_t *function_type) dbg_info *dbgi = get_dbg_info(&function_type->base.source_position); ir_type *irtype = new_d_type_method(id, n_parameters, n_results, dbgi); - if(return_type != type_void) { + if (return_type != type_void) { ir_type *restype = get_ir_type(return_type); set_method_res_type(irtype, 0, restype); } function_parameter_t *parameter = function_type->parameters; int n = 0; - for( ; parameter != NULL; parameter = parameter->next) { - ir_type *p_irtype = get_ir_type(parameter->type); + for ( ; parameter != NULL; parameter = parameter->next) { + type_t *type = get_parameter_type(parameter->type); + ir_type *p_irtype = get_ir_type(type); set_method_param_type(irtype, n, p_irtype); ++n; } - if(function_type->variadic || function_type->unspecified_parameters) { + if (function_type->variadic || function_type->unspecified_parameters) { set_method_variadicity(irtype, variadicity_variadic); } + unsigned cc = get_method_calling_convention(irtype); + switch (function_type->calling_convention) { + case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */ + case CC_CDECL: +is_cdecl: + set_method_calling_convention(irtype, SET_CDECL(cc)); + break; + + case CC_STDCALL: + if (function_type->variadic || function_type->unspecified_parameters) + goto is_cdecl; + + /* only non-variadic function can use stdcall, else use cdecl */ + set_method_calling_convention(irtype, SET_STDCALL(cc)); + break; + + case CC_FASTCALL: + if (function_type->variadic || function_type->unspecified_parameters) + goto is_cdecl; + /* only non-variadic function can use fastcall, else use cdecl */ + set_method_calling_convention(irtype, SET_FASTCALL(cc)); + break; + + case CC_THISCALL: + /* Hmm, leave default, not accepted by the parser yet. */ + warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet"); + break; + } return irtype; } @@ -383,13 +433,13 @@ static ir_type *create_array_type(array_type_t *type) const int align = get_type_alignment_bytes(ir_element_type); set_type_alignment_bytes(ir_type, align); - if(type->size_constant) { + if (type->size_constant) { int n_elements = type->size; set_array_bounds_int(ir_type, 0, 0, n_elements); size_t elemsize = get_type_size_bytes(ir_element_type); - if(elemsize % align > 0) { + if (elemsize % align > 0) { elemsize += align - (elemsize % align); } set_type_size_bytes(ir_type, n_elements * elemsize); @@ -475,13 +525,13 @@ static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp, static ir_type *create_bitfield_type(bitfield_type_t *const type) { type_t *base = skip_typeref(type->base_type); - assert(base->kind == TYPE_ATOMIC); + assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM); ir_type *irbase = get_ir_type(base); unsigned size = fold_constant(type->size); assert(!is_type_float(base)); - if(is_type_signed(base)) { + if (is_type_signed(base)) { return get_signed_int_type_for_bit_size(irbase, size); } else { return get_unsigned_int_type_for_bit_size(irbase, size); @@ -496,7 +546,7 @@ enum { }; /** - * Construct firm type from ast struct tyep. + * Construct firm type from ast struct type. * * As anonymous inner structs get flattened to a single firm type, we might get * irtype, outer_offset and out_align passed (they represent the position of @@ -507,9 +557,9 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, bool incomplete, bool is_union) { declaration_t *declaration = type->declaration; - declaration_kind_t kind = declaration->declaration_kind; + declaration_kind_t kind = (declaration_kind_t)declaration->declaration_kind; - if(kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE + if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE && incomplete)) return declaration->v.irtype; @@ -519,10 +569,10 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, size_t bit_offset = 0; size_t size = 0; - if(irtype == NULL) { + if (irtype == NULL) { symbol_t *symbol = declaration->symbol; ident *id; - if(symbol != NULL) { + if (symbol != NULL) { id = new_id_from_str(symbol->string); } else { if (is_union) { @@ -548,14 +598,14 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, align_all = *outer_align; } - if(incomplete) + if (incomplete) return irtype; declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE; declaration_t *entry = declaration->scope.declarations; for( ; entry != NULL; entry = entry->next) { - if(entry->namespc != NAMESPACE_NORMAL) + if (entry->namespc != NAMESPACE_NORMAL) continue; size_t prev_offset = offset; @@ -565,14 +615,14 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, dbg_info *dbgi = get_dbg_info(&entry->source_position); ident *ident; - if(symbol != NULL) { + if (symbol != NULL) { ident = new_id_from_str(symbol->string); } else { - if(entry_type->kind == TYPE_COMPOUND_STRUCT) { + if (entry_type->kind == TYPE_COMPOUND_STRUCT) { create_compound_type(&entry_type->compound, irtype, &offset, &align_all, false, COMPOUND_IS_STRUCT); goto finished_member; - } else if(entry_type->kind == TYPE_COMPOUND_UNION) { + } else if (entry_type->kind == TYPE_COMPOUND_UNION) { create_compound_type(&entry_type->compound, irtype, &offset, &align_all, false, COMPOUND_IS_UNION); goto finished_member; @@ -583,7 +633,7 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, } ir_type *base_irtype; - if(entry_type->kind == TYPE_BITFIELD) { + if (entry_type->kind == TYPE_BITFIELD) { base_irtype = get_ir_type(entry_type->bitfield.base_type); } else { base_irtype = get_ir_type(entry_type); @@ -597,11 +647,11 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, size_t base; size_t bits_remainder; - if(entry_type->kind == TYPE_BITFIELD) { + if (entry_type->kind == TYPE_BITFIELD) { size_t size_bits = fold_constant(entry_type->bitfield.size); size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset; - if(size_bits > rest_size_bits) { + if (size_bits > rest_size_bits) { /* start a new bucket */ offset += entry_alignment - misalign; bit_offset = 0; @@ -618,7 +668,7 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, bit_offset = bit_offset + (size_bits % 8); } else { size_t entry_size = get_type_size_bytes(base_irtype); - if(misalign > 0 || bit_offset > 0) + if (misalign > 0 || bit_offset > 0) offset += entry_alignment - misalign; base = offset; @@ -627,8 +677,8 @@ static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype, bit_offset = 0; } - if(entry_alignment > align_all) { - if(entry_alignment % align_all != 0) { + if (entry_alignment > align_all) { + if (entry_alignment % align_all != 0) { panic("uneven alignments not supported yet"); } align_all = entry_alignment; @@ -658,11 +708,11 @@ finished_member: } size_t misalign = offset % align_all; - if(misalign > 0 || bit_offset > 0) { + if (misalign > 0 || bit_offset > 0) { size += align_all - misalign; } - if(outer_offset != NULL) { + if (outer_offset != NULL) { if (!is_union) { *outer_offset = offset; } else { @@ -670,7 +720,7 @@ finished_member: } if (align_all > *outer_align) { - if(align_all % *outer_align != 0) { + if (align_all % *outer_align != 0) { panic("uneven alignments not supported yet"); } *outer_align = align_all; @@ -692,6 +742,9 @@ static ir_type *create_enum_type(enum_type_t *const type) tarval *const one = get_mode_one(mode); tarval * tv_next = get_tarval_null(mode); + bool constant_folding_old = constant_folding; + constant_folding = true; + declaration_t *declaration = type->declaration->next; for (; declaration != NULL; declaration = declaration->next) { if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) @@ -711,6 +764,8 @@ static ir_type *create_enum_type(enum_type_t *const type) tv_next = tarval_add(tv_next, one); } + constant_folding = constant_folding_old; + return ir_type_int; } @@ -728,7 +783,6 @@ static ir_type *get_ir_type_incomplete(type_t *type) case TYPE_COMPOUND_STRUCT: return create_compound_type(&type->compound, NULL, NULL, NULL, true, COMPOUND_IS_STRUCT); - break; case TYPE_COMPOUND_UNION: return create_compound_type(&type->compound, NULL, NULL, NULL, true, COMPOUND_IS_UNION); @@ -793,7 +847,7 @@ static ir_type *get_ir_type(type_t *type) case TYPE_INVALID: break; } - if(firm_type == NULL) + if (firm_type == NULL) panic("unknown type found"); type->base.firm_type = firm_type; @@ -805,7 +859,7 @@ static inline ir_mode *get_ir_mode(type_t *type) ir_type *irtype = get_ir_type(type); /* firm doesn't report a mode for arrays somehow... */ - if(is_Array_type(irtype)) { + if (is_Array_type(irtype)) { return mode_P_data; } @@ -814,8 +868,6 @@ static inline ir_mode *get_ir_mode(type_t *type) return mode; } -static ident *predef_idents[rts_max]; - /** Names of the runtime functions. */ static const struct { int id; /**< the rts id */ @@ -826,6 +878,7 @@ static const struct { } rts_data[] = { { rts_debugbreak, 0, "__debugbreak", 0, _MS }, { rts_abort, 0, "abort", 0, _C89 }, + { rts_alloca, 1, "alloca", 1, _ALL }, { rts_abs, 1, "abs", 1, _C89 }, { rts_labs, 1, "labs", 1, _C89 }, { rts_llabs, 1, "llabs", 1, _C99 }, @@ -897,6 +950,8 @@ static const struct { { rts_strncmp, 1, "strncmp", 3, _C89 } }; +static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])]; + /** * Mangles an entity linker (ld) name for win32 usage. * @@ -914,7 +969,7 @@ static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration) id = mangle(id_underscore, get_entity_ident(ent)); } - decl_modifiers_t decl_modifiers = declaration->decl_modifiers; + decl_modifiers_t decl_modifiers = declaration->modifiers; if (decl_modifiers & DM_DLLIMPORT) { /* add prefix for imported symbols */ id = mangle(id_imp, id); @@ -952,9 +1007,34 @@ typedef ident* (*create_ld_ident_func)(ir_entity *entity, declaration_t *declaration); create_ld_ident_func create_ld_ident = create_ld_ident_linux_elf; -static ir_entity* get_function_entity(declaration_t *declaration) +/** + * Handle GNU attributes for entities + * + * @param ent the entity + * @param decl the routine declaration + */ +static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl) +{ + if (decl->modifiers & DM_PURE) { + /* TRUE if the declaration includes the GNU + __attribute__((pure)) specifier. */ + set_entity_additional_property(ent, mtp_property_pure); + } + if (decl->modifiers & DM_USED) { + /* TRUE if the declaration includes the GNU + __attribute__((used)) specifier. */ + set_entity_stickyness(ent, stickyness_sticky); + } +} + +/** + * Creates an entity representing a function. + * + * @param declaration the function declaration + */ +static ir_entity *get_function_entity(declaration_t *declaration) { - if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION) + if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION) return declaration->v.entity; assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN); @@ -965,54 +1045,73 @@ static ir_entity* get_function_entity(declaration_t *declaration) ir_type *ir_type_method = get_ir_type(declaration->type); assert(is_Method_type(ir_type_method)); - dbg_info *const dbgi = get_dbg_info(&declaration->source_position); - ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi); - set_entity_ld_ident(entity, create_ld_ident(entity, declaration)); - if(declaration->storage_class == STORAGE_CLASS_STATIC && - declaration->init.statement == NULL) { - /* this entity was declared, but never defined */ - set_entity_peculiarity(entity, peculiarity_description); + /* already an entity defined? */ + ir_entity *entity = entitymap_get(&entitymap, symbol); + if (entity != NULL) { + if (get_entity_visibility(entity) == visibility_external_allocated + && declaration->init.statement != NULL) { + set_entity_visibility(entity, visibility_external_visible); + } + goto entity_created; } - if(declaration->storage_class == STORAGE_CLASS_STATIC - || declaration->is_inline) { + + dbg_info *const dbgi = get_dbg_info(&declaration->source_position); + entity = new_d_entity(global_type, id, ir_type_method, dbgi); + set_entity_ld_ident(entity, create_ld_ident(entity, declaration)); + + handle_gnu_attributes_ent(entity, declaration); + + /* static inline => local + * extern inline => local + * inline without definition => local + * inline with definition => external_visible */ + storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class; + bool const is_inline = declaration->is_inline; + bool const has_body = declaration->init.statement != NULL; + if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) { + set_entity_visibility(entity, visibility_external_visible); + } else if (storage_class == STORAGE_CLASS_STATIC || + (is_inline && has_body)) { + if (!has_body) { + /* this entity was declared, but is defined nowhere */ + set_entity_peculiarity(entity, peculiarity_description); + } set_entity_visibility(entity, visibility_local); - } else if(declaration->init.statement != NULL) { + } else if (has_body) { set_entity_visibility(entity, visibility_external_visible); } else { set_entity_visibility(entity, visibility_external_allocated); + } + set_entity_allocation(entity, allocation_static); - /* We should check for file scope here, but as long as we compile C only - this is not needed. */ - int n_params = get_method_n_params(ir_type_method); - int n_res = get_method_n_ress(ir_type_method); - int i; - - if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) { - /* found abort(), store for later */ - //abort_ent = ent; - //abort_tp = ftype; - } else { - if (! firm_opt.freestanding) { - /* check for a known runtime function */ - for (i = 0; i < rts_max; ++i) { - /* ignore those rts functions not necessary needed for current mode */ - if ((c_mode & rts_data[i].flags) == 0) - continue; - if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res && - id == predef_idents[rts_data[i].id]) - rts_entities[rts_data[i].id] = entity; - } - } + /* We should check for file scope here, but as long as we compile C only + this is not needed. */ + if (! firm_opt.freestanding) { + /* check for a known runtime function */ + for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) { + if (id != rts_idents[i]) + continue; + + /* ignore those rts functions not necessary needed for current mode */ + if ((c_mode & rts_data[i].flags) == 0) + continue; + assert(rts_entities[rts_data[i].id] == NULL); + rts_entities[rts_data[i].id] = entity; } } - set_entity_allocation(entity, allocation_static); + entitymap_insert(&entitymap, symbol, entity); + +entity_created: declaration->declaration_kind = DECLARATION_KIND_FUNCTION; declaration->v.entity = entity; return entity; } +/** + * Creates a Const node representing a constant. + */ static ir_node *const_to_firm(const const_expression_t *cnst) { dbg_info *dbgi = get_dbg_info(&cnst->base.source_position); @@ -1021,10 +1120,10 @@ static ir_node *const_to_firm(const const_expression_t *cnst) char buf[128]; tarval *tv; size_t len; - if(mode_is_float(mode)) { + if (mode_is_float(mode)) { tv = new_tarval_from_double(cnst->v.float_value, mode); } else { - if(mode_is_signed(mode)) { + if (mode_is_signed(mode)) { len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value); } else { len = snprintf(buf, sizeof(buf), "%llu", @@ -1036,6 +1135,9 @@ static ir_node *const_to_firm(const const_expression_t *cnst) return new_d_Const(dbgi, mode, tv); } +/** + * Creates a Const node representing a character constant. + */ static ir_node *character_constant_to_firm(const const_expression_t *cnst) { dbg_info *dbgi = get_dbg_info(&cnst->base.source_position); @@ -1056,6 +1158,9 @@ static ir_node *character_constant_to_firm(const const_expression_t *cnst) return new_d_Const(dbgi, mode, tv); } +/** + * Creates a Const node representing a wide character constant. + */ static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst) { dbg_info *dbgi = get_dbg_info(&cnst->base.source_position); @@ -1070,6 +1175,13 @@ static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst) return new_d_Const(dbgi, mode, tv); } +/** + * Creates a SymConst for a given entity. + * + * @param dbgi debug info + * @param mode the (reference) mode for the SymConst + * @param entity the entity + */ static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode, ir_entity *entity) { @@ -1079,6 +1191,13 @@ static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode, return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent); } +/** + * Creates a SymConst node representing a string constant. + * + * @param src_pos the source position of the string constant + * @param id_prefix a prefix for the name of the generated string constant + * @param value the value of the string constant + */ static ir_node *string_to_firm(const source_position_t *const src_pos, const char *const id_prefix, const string_t *const value) @@ -1116,6 +1235,11 @@ static ir_node *string_to_firm(const source_position_t *const src_pos, return create_symconst(dbgi, mode_P_data, entity); } +/** + * Creates a SymConst node representing a string literal. + * + * @param literal the string literal + */ static ir_node *string_literal_to_firm( const string_literal_expression_t* literal) { @@ -1123,6 +1247,11 @@ static ir_node *string_literal_to_firm( &literal->value); } +/** + * Creates a SymConst node representing a wide string literal. + * + * @param literal the wide string literal + */ static ir_node *wide_string_literal_to_firm( const wide_string_literal_expression_t* const literal) { @@ -1159,8 +1288,8 @@ static ir_node *wide_string_literal_to_firm( return create_symconst(dbgi, mode_P_data, entity); } -static ir_node *deref_address(type_t *const type, ir_node *const addr, - dbg_info *const dbgi) +static ir_node *deref_address(dbg_info *const dbgi, type_t *const type, + ir_node *const addr) { ir_type *irtype = get_ir_type(type); if (is_compound_type(irtype) @@ -1175,7 +1304,7 @@ static ir_node *deref_address(type_t *const type, ir_node *const addr, ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M); ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res); - if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { + if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { set_Load_volatility(load, volatility_is_volatile); } @@ -1183,6 +1312,9 @@ static ir_node *deref_address(type_t *const type, ir_node *const addr, return load_res; } +/** + * Creates a strict Conv if neccessary. + */ static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node) { ir_mode *mode = get_irn_mode(node); @@ -1193,7 +1325,7 @@ static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node) return node; /* check if there is already a Conv */ - if (get_irn_op(node) == op_Conv) { + if (is_Conv(node)) { /* convert it into a strict Conv */ set_Conv_strict(node, 1); return node; @@ -1223,8 +1355,10 @@ static ir_node *get_global_var_address(dbg_info *const dbgi, } } -/* Returns the correct base address depending on whether it is a parameter or a - * normal local variable */ +/** + * Returns the correct base address depending on whether it is a parameter or a + * normal local variable. + */ static ir_node *get_local_frame(ir_entity *const ent) { ir_graph *const irg = current_ir_graph; @@ -1244,7 +1378,7 @@ static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode) if (value_mode == dest_mode || is_Bad(value)) return value; - if(dest_mode == mode_b) { + if (dest_mode == mode_b) { ir_node *zero = new_Const(value_mode, get_mode_null(value_mode)); ir_node *cmp = new_d_Cmp(dbgi, value, zero); ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg); @@ -1260,13 +1394,13 @@ static ir_node *reference_expression_to_firm(const reference_expression_t *ref) declaration_t *declaration = ref->declaration; type_t *type = skip_typeref(declaration->type); + /* make sure the type is constructed */ + (void) get_ir_type(type); + switch((declaration_kind_t) declaration->declaration_kind) { + case DECLARATION_KIND_TYPE: case DECLARATION_KIND_UNKNOWN: - if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) { - break; - } - get_ir_type(type); - /* FALLTHROUGH */ + break; case DECLARATION_KIND_ENUM_ENTRY: { ir_mode *const mode = get_ir_mode(type); @@ -1283,14 +1417,14 @@ static ir_node *reference_expression_to_firm(const reference_expression_t *ref) } case DECLARATION_KIND_GLOBAL_VARIABLE: { ir_node *const addr = get_global_var_address(dbgi, declaration); - return deref_address(declaration->type, addr, dbgi); + return deref_address(dbgi, declaration->type, addr); } case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: { ir_entity *entity = declaration->v.entity; ir_node *frame = get_local_frame(entity); ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity); - return deref_address(declaration->type, sel, dbgi); + return deref_address(dbgi, declaration->type, sel); } case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY: @@ -1312,10 +1446,13 @@ static ir_node *reference_addr(const reference_expression_t *ref) declaration_t *declaration = ref->declaration; switch((declaration_kind_t) declaration->declaration_kind) { + case DECLARATION_KIND_TYPE: case DECLARATION_KIND_UNKNOWN: break; case DECLARATION_KIND_LOCAL_VARIABLE: - panic("local variable without entity has no address"); + /* you can store to a local variable (so we don't panic but return NULL + * as an indicator for no real address) */ + return NULL; case DECLARATION_KIND_FUNCTION: { type_t *const type = skip_typeref(ref->base.type); ir_mode *const mode = get_ir_mode(type); @@ -1349,6 +1486,9 @@ static ir_node *reference_addr(const reference_expression_t *ref) panic("reference to declaration with unknown type found"); } +/** + * Transform calls to builtin functions. + */ static ir_node *process_builtin_call(const call_expression_t *call) { dbg_info *dbgi = get_dbg_info(&call->base.source_position); @@ -1364,7 +1504,7 @@ static ir_node *process_builtin_call(const call_expression_t *call) switch(symbol->ID) { case T___builtin_alloca: { - if(call->arguments == NULL || call->arguments->next != NULL) { + if (call->arguments == NULL || call->arguments->next != NULL) { panic("invalid number of parameters on __builtin_alloca"); } expression_t *argument = call->arguments->expression; @@ -1379,6 +1519,12 @@ static ir_node *process_builtin_call(const call_expression_t *call) return res; } + case T___builtin_huge_val: { + ir_mode *mode = get_ir_mode(function_type->function.return_type); + tarval *tv = get_mode_infinite(mode); + ir_node *res = new_d_Const(dbgi, mode, tv); + return res; + } case T___builtin_nan: case T___builtin_nanf: case T___builtin_nand: { @@ -1396,14 +1542,46 @@ static ir_node *process_builtin_call(const call_expression_t *call) } } +/** + * Transform a call expression. + * Handles some special cases, like alloca() calls, which must be resolved + * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous, + * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not + * handled right... + */ static ir_node *call_expression_to_firm(const call_expression_t *call) { + dbg_info *dbgi = get_dbg_info(&call->base.source_position); assert(get_cur_block() != NULL); expression_t *function = call->function; - if(function->kind == EXPR_BUILTIN_SYMBOL) { + if (function->kind == EXPR_BUILTIN_SYMBOL) { return process_builtin_call(call); } + if (function->kind == EXPR_REFERENCE) { + const reference_expression_t *ref = &function->reference; + declaration_t *declaration = ref->declaration; + + if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) { + if (declaration->v.entity == rts_entities[rts_alloca]) { + /* handle alloca() call */ + expression_t *argument = call->arguments->expression; + ir_node *size = expression_to_firm(argument); + + size = create_conv(dbgi, size, get_ir_mode(type_size_t)); + + ir_node *store = get_store(); + dbg_info *dbgi = get_dbg_info(&call->base.source_position); + ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type, + stack_alloc); + ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M); + set_store(proj_m); + ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res); + + return res; + } + } + } ir_node *callee = expression_to_firm(function); type_t *type = skip_typeref(function->base.type); @@ -1413,12 +1591,10 @@ static ir_node *call_expression_to_firm(const call_expression_t *call) assert(is_type_function(points_to)); function_type_t *function_type = &points_to->function; - dbg_info *dbgi = get_dbg_info(&call->base.source_position); - int n_parameters = 0; ir_type *ir_method_type = get_ir_type((type_t*) function_type); ir_type *new_method_type = NULL; - if(function_type->variadic || function_type->unspecified_parameters) { + if (function_type->variadic || function_type->unspecified_parameters) { const call_argument_t *argument = call->arguments; for( ; argument != NULL; argument = argument->next) { ++n_parameters; @@ -1475,9 +1651,9 @@ static ir_node *call_expression_to_firm(const call_expression_t *call) type_t *return_type = skip_typeref(function_type->return_type); ir_node *result = NULL; - if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) { + if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) { ir_mode *mode; - if(is_type_scalar(return_type)) { + if (is_type_scalar(return_type)) { mode = get_ir_mode(return_type); } else { mode = mode_P_data; @@ -1493,9 +1669,9 @@ static void statement_to_firm(statement_t *statement); static ir_node *compound_statement_to_firm(compound_statement_t *compound); static ir_node *expression_to_addr(const expression_t *expression); -static void create_condition_evaluation(const expression_t *expression, - ir_node *true_block, - ir_node *false_block); +static ir_node *create_condition_evaluation(const expression_t *expression, + ir_node *true_block, + ir_node *false_block); static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type, ir_node *value) @@ -1504,10 +1680,10 @@ static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type, ir_node *memory = get_store(); - if(is_type_scalar(type)) { + if (is_type_scalar(type)) { ir_node *store = new_d_Store(dbgi, memory, addr, value); ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M); - if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) + if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) set_Store_volatility(store, volatility_is_volatile); set_store(store_mem); } else { @@ -1523,9 +1699,10 @@ static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size) tarval *all_one = get_mode_all_one(mode); int mode_size = get_mode_size_bits(mode); - assert(offset >= 0 && size >= 0); + assert(offset >= 0); + assert(size >= 0); assert(offset + size <= mode_size); - if(size == mode_size) { + if (size == mode_size) { return all_one; } @@ -1539,22 +1716,18 @@ static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size) return mask1; } -static void bitfield_store_to_firm(const unary_expression_t *expression, - ir_node *value) +static void bitfield_store_to_firm(const select_expression_t *expression, + ir_node *addr, ir_node *value) { - expression_t *select = expression->value; - assert(select->kind == EXPR_SELECT); - type_t *type = select->base.type; - assert(type->kind == TYPE_BITFIELD); - ir_mode *mode = get_ir_mode(type->bitfield.base_type); - ir_node *addr = expression_to_addr(select); + type_t *type = expression->base.type; + ir_mode *mode = get_ir_mode(type); assert(get_irn_mode(value) == mode || is_Bad(value)); dbg_info *dbgi = get_dbg_info(&expression->base.source_position); /* kill upper bits of value and shift to right position */ - ir_entity *entity = select->select.compound_entry->v.entity; + ir_entity *entity = expression->compound_entry->v.entity; int bitoffset = get_entity_offset_bits_remainder(entity); ir_type *entity_type = get_entity_type(entity); int bitsize = get_mode_size_bits(get_type_mode(entity_type)); @@ -1582,50 +1755,135 @@ static void bitfield_store_to_firm(const unary_expression_t *expression, ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M); set_store(store_mem); - if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { + if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { set_Load_volatility(load, volatility_is_volatile); set_Store_volatility(store, volatility_is_volatile); } } -static void set_value_for_expression(const expression_t *expression, - ir_node *value) +static ir_node *bitfield_extract_to_firm(const select_expression_t *expression, + ir_node *addr) +{ + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + type_t *type = expression->base.type; + ir_mode *mode = get_ir_mode(type); + ir_node *mem = get_store(); + ir_node *load = new_d_Load(dbgi, mem, addr, mode); + ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M); + ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res); + + load_res = create_conv(dbgi, load_res, mode_int); + + set_store(load_mem); + + /* kill upper bits */ + ir_entity *entity = expression->compound_entry->v.entity; + int bitoffset = get_entity_offset_bits_remainder(entity); + ir_type *entity_type = get_entity_type(entity); + int bitsize = get_mode_size_bits(get_type_mode(entity_type)); + long shift_bitsl = machine_size - bitoffset - bitsize; + assert(shift_bitsl >= 0); + tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint); + ir_node *countl = new_d_Const(dbgi, mode_uint, tvl); + ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int); + + long shift_bitsr = bitoffset + shift_bitsl; + assert(shift_bitsr <= (long) machine_size); + tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint); + ir_node *countr = new_d_Const(dbgi, mode_uint, tvr); + ir_node *shiftr; + if (mode_is_signed(mode)) { + shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int); + } else { + shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int); + } + + return create_conv(dbgi, shiftr, mode); +} + +static void set_value_for_expression_addr(const expression_t *expression, + ir_node *value, ir_node *addr) { dbg_info *dbgi = get_dbg_info(&expression->base.source_position); value = do_strict_conv(dbgi, value); - if(expression->kind == EXPR_REFERENCE) { + if (expression->kind == EXPR_REFERENCE) { const reference_expression_t *ref = &expression->reference; declaration_t *declaration = ref->declaration; assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN); - if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) { + if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) { set_value(declaration->v.value_number, value); return; } } - if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) { - bitfield_store_to_firm(&expression->unary, value); - return; + if (addr == NULL) + addr = expression_to_addr(expression); + + type_t *type = skip_typeref(expression->base.type); + + if (expression->kind == EXPR_SELECT) { + const select_expression_t *select = &expression->select; + + declaration_t *declaration = select->compound_entry; + if (declaration->type->kind == TYPE_BITFIELD) { + bitfield_store_to_firm(select, addr, value); + return; + } } - ir_node *addr = expression_to_addr(expression); - type_t *type = skip_typeref(expression->base.type); assign_value(dbgi, addr, type, value); } +static void set_value_for_expression(const expression_t *expression, + ir_node *value) +{ + set_value_for_expression_addr(expression, value, NULL); +} + +static ir_node *get_value_from_lvalue(const expression_t *expression, + ir_node *addr) +{ + if (expression->kind == EXPR_REFERENCE) { + const reference_expression_t *ref = &expression->reference; + + declaration_t *declaration = ref->declaration; + assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN); + if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) { + assert(addr == NULL); + ir_mode *mode = get_ir_mode(expression->base.type); + return get_value(declaration->v.value_number, mode); + } + } + + assert(addr != NULL); + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + + ir_node *value; + if (expression->kind == EXPR_SELECT && + expression->select.compound_entry->type->kind == TYPE_BITFIELD){ + value = bitfield_extract_to_firm(&expression->select, addr); + } else { + value = deref_address(dbgi, expression->base.type, addr); + } + + return value; +} + + static ir_node *create_incdec(const unary_expression_t *expression) { - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - type_t *type = skip_typeref(expression->base.type); - ir_mode *mode = get_ir_mode(type); - expression_t *value = expression->value; + dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); + const expression_t *value_expr = expression->value; + ir_node *addr = expression_to_addr(value_expr); + ir_node *value = get_value_from_lvalue(value_expr, addr); - ir_node *value_node = expression_to_firm(value); + type_t *type = skip_typeref(expression->base.type); + ir_mode *mode = get_ir_mode(expression->base.type); ir_node *offset; - if(is_type_pointer(type)) { + if (is_type_pointer(type)) { pointer_type_t *pointer_type = &type->pointer; offset = get_type_size(pointer_type->points_to); } else { @@ -1633,31 +1891,32 @@ static ir_node *create_incdec(const unary_expression_t *expression) offset = new_Const(mode, get_mode_one(mode)); } + ir_node *result; + ir_node *store_value; switch(expression->base.kind) { - case EXPR_UNARY_POSTFIX_INCREMENT: { - ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode); - set_value_for_expression(value, new_value); - return value_node; - } - case EXPR_UNARY_POSTFIX_DECREMENT: { - ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode); - set_value_for_expression(value, new_value); - return value_node; - } - case EXPR_UNARY_PREFIX_INCREMENT: { - ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode); - set_value_for_expression(value, new_value); - return new_value; - } - case EXPR_UNARY_PREFIX_DECREMENT: { - ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode); - set_value_for_expression(value, new_value); - return new_value; - } + case EXPR_UNARY_POSTFIX_INCREMENT: + result = value; + store_value = new_d_Add(dbgi, value, offset, mode); + break; + case EXPR_UNARY_POSTFIX_DECREMENT: + result = value; + store_value = new_d_Sub(dbgi, value, offset, mode); + break; + case EXPR_UNARY_PREFIX_INCREMENT: + result = new_d_Add(dbgi, value, offset, mode); + store_value = result; + break; + case EXPR_UNARY_PREFIX_DECREMENT: + result = new_d_Sub(dbgi, value, offset, mode); + store_value = result; + break; default: panic("no incdec expr in create_incdec"); - return NULL; } + + set_value_for_expression_addr(value_expr, store_value, addr); + + return result; } static bool is_local_variable(expression_t *expression) @@ -1775,56 +2034,12 @@ static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) { } } -static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression) -{ - expression_t *select = expression->value; - assert(select->kind == EXPR_SELECT); - - type_t *type = select->base.type; - assert(type->kind == TYPE_BITFIELD); - ir_mode *mode = get_ir_mode(type->bitfield.base_type); - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *addr = expression_to_addr(select); - ir_node *mem = get_store(); - ir_node *load = new_d_Load(dbgi, mem, addr, mode); - ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M); - ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res); - - load_res = create_conv(dbgi, load_res, mode_int); - - set_store(load_mem); - - /* kill upper bits */ - ir_entity *entity = select->select.compound_entry->v.entity; - int bitoffset = get_entity_offset_bits_remainder(entity); - ir_type *entity_type = get_entity_type(entity); - int bitsize = get_mode_size_bits(get_type_mode(entity_type)); - long shift_bitsl = machine_size - bitoffset - bitsize; - assert(shift_bitsl >= 0); - tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint); - ir_node *countl = new_d_Const(dbgi, mode_uint, tvl); - ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int); - - long shift_bitsr = bitoffset + shift_bitsl; - assert(shift_bitsr <= (long) machine_size); - tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint); - ir_node *countr = new_d_Const(dbgi, mode_uint, tvr); - ir_node *shiftr; - if(mode_is_signed(mode)) { - shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int); - } else { - shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int); - } - - return create_conv(dbgi, shiftr, mode); -} - static ir_node *unary_expression_to_firm(const unary_expression_t *expression) { dbg_info *dbgi = get_dbg_info(&expression->base.source_position); type_t *type = skip_typeref(expression->base.type); - if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS) + if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS) return expression_to_addr(expression->value); const expression_t *value = expression->value; @@ -1843,23 +2058,17 @@ static ir_node *unary_expression_to_firm(const unary_expression_t *expression) return new_d_Not(dbgi, value_node, mode); } case EXPR_UNARY_NOT: { - ir_node *value_node = expression_to_firm(value); - ir_mode *mode = get_ir_mode(type); - if(get_irn_mode(value_node) != mode_b) { - value_node = create_conv(dbgi, value_node, mode_b); - } - value_node = new_d_Not(dbgi, value_node, mode_b); - if(mode != mode_b) { - value_node = create_conv(dbgi, value_node, mode); - } - return value_node; + ir_node *value_node = _expression_to_firm(value); + value_node = create_conv(dbgi, value_node, mode_b); + ir_node *res = new_d_Not(dbgi, value_node, mode_b); + return res; } case EXPR_UNARY_DEREFERENCE: { ir_node *value_node = expression_to_firm(value); type_t *value_type = skip_typeref(value->base.type); assert(is_type_pointer(value_type)); type_t *points_to = value_type->pointer.points_to; - return deref_address(points_to, value_node, dbgi); + return deref_address(dbgi, points_to, value_node); } case EXPR_UNARY_POSTFIX_INCREMENT: case EXPR_UNARY_POSTFIX_DECREMENT: @@ -1868,7 +2077,7 @@ static ir_node *unary_expression_to_firm(const unary_expression_t *expression) return create_incdec(expression); case EXPR_UNARY_CAST: { ir_node *value_node = expression_to_firm(value); - if(is_type_scalar(type)) { + if (is_type_scalar(type)) { ir_mode *mode = get_ir_mode(type); ir_node *node = create_conv(dbgi, value_node, mode); node = do_strict_conv(dbgi, node); @@ -1881,7 +2090,7 @@ static ir_node *unary_expression_to_firm(const unary_expression_t *expression) } case EXPR_UNARY_CAST_IMPLICIT: { ir_node *value_node = expression_to_firm(value); - if(is_type_scalar(type)) { + if (is_type_scalar(type)) { ir_mode *mode = get_ir_mode(type); return create_conv(dbgi, value_node, mode); } else { @@ -1889,12 +2098,10 @@ static ir_node *unary_expression_to_firm(const unary_expression_t *expression) } } case EXPR_UNARY_ASSUME: - if(firm_opt.confirm) + if (firm_opt.confirm) return handle_assume(dbgi, value); else return NULL; - case EXPR_UNARY_BITFIELD_EXTRACT: - return bitfield_extract_to_firm(expression); default: break; @@ -1902,6 +2109,9 @@ static ir_node *unary_expression_to_firm(const unary_expression_t *expression) panic("invalid UNEXPR type found"); } +/** + * produces a 0/1 depending of the value of a mode_b node + */ static ir_node *produce_condition_result(const expression_t *expression, dbg_info *dbgi) { @@ -1932,252 +2142,186 @@ static ir_node *produce_condition_result(const expression_t *expression, return val; } -static ir_node *create_lazy_op(const binary_expression_t *expression) +static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi, + ir_node *value, type_t *type) { - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - type_t *type = expression->base.type; - ir_mode *mode = get_ir_mode(type); + pointer_type_t *const pointer_type = &type->pointer; + type_t *const points_to = skip_typeref(pointer_type->points_to); + unsigned elem_size = get_type_size_const(points_to); - if(is_constant_expression(expression->left)) { - long val = fold_constant(expression->left); - expression_kind_t ekind = expression->base.kind; - if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) - || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) { - return expression_to_firm(expression->right); - } else { - assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0) - || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0)); - return new_Const(mode, get_mode_one(mode)); - } + /* gcc extension: allow arithmetic with void * and function * */ + if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) || + is_type_function(points_to)) { + elem_size = 1; } - return produce_condition_result((const expression_t*) expression, dbgi); -} - -typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left, - ir_node *right, ir_mode *mode); - -static ir_node *create_arithmetic_binop(const binary_expression_t *expression, - create_arithmetic_func func) -{ - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *left = expression_to_firm(expression->left); - ir_node *right = expression_to_firm(expression->right); - type_t *type = expression->right->base.type; - /* be careful with the modes, because in arithmetic assign nodes only - * the right operand has the mode of the arithmetic already */ - ir_mode *mode = get_ir_mode(type); - left = create_conv(dbgi, left, mode); - ir_node *res = func(dbgi, left, right, mode); - - return res; -} - -static ir_node *pointer_arithmetic(ir_node *const pointer, - ir_node * integer, - type_t *const type, - dbg_info *const dbgi, - const create_arithmetic_func func) -{ - pointer_type_t *const pointer_type = &type->pointer; - type_t *const points_to = pointer_type->points_to; - const unsigned elem_size = get_type_size_const(points_to); - assert(elem_size >= 1); - if (elem_size > 1) { - integer = create_conv(dbgi, integer, mode_int); - ir_node *const cnst = new_Const_long(mode_int, (long)elem_size); - ir_node *const mul = new_d_Mul(dbgi, integer, cnst, mode_int); - integer = mul; - } + if (elem_size == 1) + return value; - ir_mode *const mode = get_ir_mode(type); - return func(dbgi, pointer, integer, mode); + value = create_conv(dbgi, value, mode_int); + ir_node *const cnst = new_Const_long(mode_int, (long)elem_size); + ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode_int); + return mul; } -static ir_node *create_arithmetic_assign_binop( - const binary_expression_t *expression, create_arithmetic_func func) +static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression, + ir_node *left, ir_node *right) { - dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); - type_t *const type = skip_typeref(expression->base.type); - ir_node *value; + ir_mode *mode; + type_t *type_left = skip_typeref(expression->left->base.type); + type_t *type_right = skip_typeref(expression->right->base.type); - if (is_type_pointer(type)) { - ir_node *const pointer = expression_to_firm(expression->left); - ir_node * integer = expression_to_firm(expression->right); - value = pointer_arithmetic(pointer, integer, type, dbgi, func); - } else { - value = create_arithmetic_binop(expression, func); - } - - ir_mode *const mode = get_ir_mode(type); - value = create_conv(dbgi, value, mode); - set_value_for_expression(expression->left, value); - - return value; -} + expression_kind_t kind = expression->base.kind; -static ir_node *create_add(const binary_expression_t *expression) -{ - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *left = expression_to_firm(expression->left); - ir_node *right = expression_to_firm(expression->right); - type_t *type = expression->base.type; + switch (kind) { + case EXPR_BINARY_SHIFTLEFT: + case EXPR_BINARY_SHIFTRIGHT: + case EXPR_BINARY_SHIFTLEFT_ASSIGN: + case EXPR_BINARY_SHIFTRIGHT_ASSIGN: + mode = get_irn_mode(left); + right = create_conv(dbgi, right, mode_uint); + break; - expression_t *expr_left = expression->left; - expression_t *expr_right = expression->right; - type_t *type_left = skip_typeref(expr_left->base.type); - type_t *type_right = skip_typeref(expr_right->base.type); + case EXPR_BINARY_SUB: + if (is_type_pointer(type_left) && is_type_pointer(type_right)) { + const pointer_type_t *const ptr_type = &type_left->pointer; + + mode = get_ir_mode(expression->base.type); + ir_node *const elem_size = get_type_size(ptr_type->points_to); + ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode); + ir_node *const sub = new_d_Sub(dbgi, left, right, mode); + ir_node *const no_mem = new_NoMem(); + ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size, + mode, op_pin_state_floats); + return new_d_Proj(dbgi, div, mode, pn_Div_res); + } + /* fallthrough */ + case EXPR_BINARY_SUB_ASSIGN: + if (is_type_pointer(type_left)) { + right = adjust_for_pointer_arithmetic(dbgi, right, type_left); + mode = get_ir_mode(type_left); + break; + } + goto normal_node; - if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) { - ir_mode *const mode = get_ir_mode(type); - return new_d_Add(dbgi, left, right, mode); - } + case EXPR_BINARY_ADD: + case EXPR_BINARY_ADD_ASSIGN: + if (is_type_pointer(type_left)) { + right = adjust_for_pointer_arithmetic(dbgi, right, type_left); + mode = get_ir_mode(type_left); + break; + } else if (is_type_pointer(type_right)) { + left = adjust_for_pointer_arithmetic(dbgi, left, type_right); + mode = get_ir_mode(type_right); + break; + } + goto normal_node; - if (is_type_pointer(type_left)) { - return pointer_arithmetic(left, right, type, dbgi, new_d_Add); - } else { - assert(is_type_pointer(type_right)); - return pointer_arithmetic(right, left, type, dbgi, new_d_Add); + default: +normal_node: + mode = get_irn_mode(right); + left = create_conv(dbgi, left, mode); + break; } -} -static ir_node *create_sub(const binary_expression_t *expression) -{ - dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); - expression_t *const expr_left = expression->left; - expression_t *const expr_right = expression->right; - ir_node *const left = expression_to_firm(expr_left); - ir_node *const right = expression_to_firm(expr_right); - type_t *const type = expression->base.type; - type_t *const type_left = skip_typeref(expr_left->base.type); - type_t *const type_right = skip_typeref(expr_right->base.type); - - if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) { - ir_mode *const mode = get_ir_mode(type); + switch (kind) { + case EXPR_BINARY_ADD_ASSIGN: + case EXPR_BINARY_ADD: + return new_d_Add(dbgi, left, right, mode); + case EXPR_BINARY_SUB_ASSIGN: + case EXPR_BINARY_SUB: return new_d_Sub(dbgi, left, right, mode); - } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) { - const pointer_type_t *const ptr_type = &type_left->pointer; - - ir_node *const elem_size = get_type_size(ptr_type->points_to); - ir_mode *const mode = get_ir_mode(type); - ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode); - ir_node *const sub = new_d_Sub(dbgi, left, right, mode); - ir_node *const no_mem = new_NoMem(); - ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode, - op_pin_state_floats); - return new_d_Proj(dbgi, div, mode, pn_Div_res); - } - - assert(is_type_pointer(type_left)); - return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub); -} - -static ir_node *create_shift(const binary_expression_t *expression) -{ - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *left = expression_to_firm(expression->left); - ir_node *right = expression_to_firm(expression->right); - type_t *type = expression->base.type; - ir_mode *mode = get_ir_mode(type); - - /* firm always wants the shift count to be unsigned */ - right = create_conv(dbgi, right, mode_uint); - - ir_node *res; - - switch(expression->base.kind) { - case EXPR_BINARY_SHIFTLEFT_ASSIGN: + case EXPR_BINARY_MUL_ASSIGN: + case EXPR_BINARY_MUL: + return new_d_Mul(dbgi, left, right, mode); + case EXPR_BINARY_BITWISE_AND: + case EXPR_BINARY_BITWISE_AND_ASSIGN: + return new_d_And(dbgi, left, right, mode); + case EXPR_BINARY_BITWISE_OR: + case EXPR_BINARY_BITWISE_OR_ASSIGN: + return new_d_Or(dbgi, left, right, mode); + case EXPR_BINARY_BITWISE_XOR: + case EXPR_BINARY_BITWISE_XOR_ASSIGN: + return new_d_Eor(dbgi, left, right, mode); case EXPR_BINARY_SHIFTLEFT: - res = new_d_Shl(dbgi, left, right, mode); - break; + case EXPR_BINARY_SHIFTLEFT_ASSIGN: + return new_d_Shl(dbgi, left, right, mode); + case EXPR_BINARY_SHIFTRIGHT: case EXPR_BINARY_SHIFTRIGHT_ASSIGN: - case EXPR_BINARY_SHIFTRIGHT: { - expression_t *expr_left = expression->left; - type_t *type_left = skip_typeref(expr_left->base.type); - - if(is_type_signed(type_left)) { - res = new_d_Shrs(dbgi, left, right, mode); - } else { - res = new_d_Shr(dbgi, left, right, mode); - } - break; - } - default: - panic("create shift op called for non-shift op"); - } - - return res; -} - - -static ir_node *create_divmod(const binary_expression_t *expression) -{ - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *left = expression_to_firm(expression->left); - ir_node *right = expression_to_firm(expression->right); - ir_node *pin = new_Pin(new_NoMem()); - /* be careful with the modes, because in arithmetic assign nodes only - * the right operand has the mode of the arithmetic already */ - type_t *type = expression->right->base.type; - ir_mode *mode = get_ir_mode(type); - left = create_conv(dbgi, left, mode); - ir_node *op; - ir_node *res; - - switch (expression->base.kind) { + if (mode_is_signed(mode)) { + return new_d_Shrs(dbgi, left, right, mode); + } else { + return new_d_Shr(dbgi, left, right, mode); + } case EXPR_BINARY_DIV: - case EXPR_BINARY_DIV_ASSIGN: - if(mode_is_float(mode)) { + case EXPR_BINARY_DIV_ASSIGN: { + ir_node *pin = new_Pin(new_NoMem()); + ir_node *op; + ir_node *res; + if (mode_is_float(mode)) { op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats); res = new_d_Proj(dbgi, op, mode, pn_Quot_res); } else { op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats); res = new_d_Proj(dbgi, op, mode, pn_Div_res); } - break; - + return res; + } case EXPR_BINARY_MOD: - case EXPR_BINARY_MOD_ASSIGN: + case EXPR_BINARY_MOD_ASSIGN: { + ir_node *pin = new_Pin(new_NoMem()); assert(!mode_is_float(mode)); - op = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats); - res = new_d_Proj(dbgi, op, mode, pn_Mod_res); - break; - - default: panic("unexpected binary expression type in create_divmod()"); + ir_node *op = new_d_Mod(dbgi, pin, left, right, mode, + op_pin_state_floats); + ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res); + return res; + } + default: + panic("unexpected expression kind"); } - - return res; } -static ir_node *create_arithmetic_assign_divmod( - const binary_expression_t *expression) +static ir_node *create_lazy_op(const binary_expression_t *expression) { - ir_node * value = create_divmod(expression); - dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); - type_t *const type = expression->base.type; - ir_mode *const mode = get_ir_mode(type); - - assert(type->kind != TYPE_POINTER); + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + type_t *type = expression->base.type; + ir_mode *mode = get_ir_mode(type); - value = create_conv(dbgi, value, mode); - set_value_for_expression(expression->left, value); + if (is_constant_expression(expression->left)) { + long val = fold_constant(expression->left); + expression_kind_t ekind = expression->base.kind; + assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR); + if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) || + (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) { + return expression_to_firm(expression->right); + } else { + return new_Const(mode, get_mode_one(mode)); + } + } - return value; + return produce_condition_result((const expression_t*) expression, dbgi); } -static ir_node *create_arithmetic_assign_shift( - const binary_expression_t *expression) +typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left, + ir_node *right, ir_mode *mode); + +static ir_node *create_assign_binop(const binary_expression_t *expression) { - ir_node * value = create_shift(expression); - dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); - type_t *const type = expression->base.type; - ir_mode *const mode = get_ir_mode(type); + dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); + const expression_t *left_expr = expression->left; + ir_mode *left_mode = get_ir_mode(left_expr->base.type); + ir_node *left_addr = expression_to_addr(left_expr); + ir_node *left = get_value_from_lvalue(left_expr, left_addr); + ir_node *right = expression_to_firm(expression->right); + ir_node *result = create_op(dbgi, expression, left, right); - value = create_conv(dbgi, value, mode); - set_value_for_expression(expression->left, value); + result = create_conv(dbgi, result, left_mode); + result = do_strict_conv(dbgi, result); - return value; + set_value_for_expression_addr(left_expr, result, left_addr); + + return result; } static ir_node *binary_expression_to_firm(const binary_expression_t *expression) @@ -2206,55 +2350,49 @@ static ir_node *binary_expression_to_firm(const binary_expression_t *expression) return proj; } case EXPR_BINARY_ASSIGN: { + ir_node *addr = expression_to_addr(expression->left); ir_node *right = expression_to_firm(expression->right); - set_value_for_expression(expression->left, right); + set_value_for_expression_addr(expression->left, right, addr); return right; } case EXPR_BINARY_ADD: - return create_add(expression); case EXPR_BINARY_SUB: - return create_sub(expression); case EXPR_BINARY_MUL: - return create_arithmetic_binop(expression, new_d_Mul); + case EXPR_BINARY_DIV: + case EXPR_BINARY_MOD: case EXPR_BINARY_BITWISE_AND: - return create_arithmetic_binop(expression, new_d_And); case EXPR_BINARY_BITWISE_OR: - return create_arithmetic_binop(expression, new_d_Or); case EXPR_BINARY_BITWISE_XOR: - return create_arithmetic_binop(expression, new_d_Eor); case EXPR_BINARY_SHIFTLEFT: case EXPR_BINARY_SHIFTRIGHT: - return create_shift(expression); - case EXPR_BINARY_DIV: - case EXPR_BINARY_MOD: - return create_divmod(expression); + { + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + ir_node *left = expression_to_firm(expression->left); + ir_node *right = expression_to_firm(expression->right); + return create_op(dbgi, expression, left, right); + } case EXPR_BINARY_LOGICAL_AND: case EXPR_BINARY_LOGICAL_OR: return create_lazy_op(expression); case EXPR_BINARY_COMMA: - expression_to_firm(expression->left); - return expression_to_firm(expression->right); + /* create side effects of left side */ + (void) expression_to_firm(expression->left); + return _expression_to_firm(expression->right); + case EXPR_BINARY_ADD_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_Add); case EXPR_BINARY_SUB_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_Sub); case EXPR_BINARY_MUL_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_Mul); case EXPR_BINARY_MOD_ASSIGN: case EXPR_BINARY_DIV_ASSIGN: - return create_arithmetic_assign_divmod(expression); case EXPR_BINARY_BITWISE_AND_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_And); case EXPR_BINARY_BITWISE_OR_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_Or); case EXPR_BINARY_BITWISE_XOR_ASSIGN: - return create_arithmetic_assign_binop(expression, new_d_Eor); case EXPR_BINARY_SHIFTLEFT_ASSIGN: case EXPR_BINARY_SHIFTRIGHT_ASSIGN: - return create_arithmetic_assign_shift(expression); + return create_assign_binop(expression); case EXPR_BINARY_BUILTIN_EXPECT: - return expression_to_firm(expression->left); + return _expression_to_firm(expression->left); default: panic("TODO binexpr type"); } @@ -2266,12 +2404,14 @@ static ir_node *array_access_addr(const array_access_expression_t *expression) ir_node *base_addr = expression_to_firm(expression->array_ref); ir_node *offset = expression_to_firm(expression->index); - /* Matze: it would be better to force mode to mode_uint as this creates more - * opportunities for CSE. Unforunately we still have some optimisations that - * are too conservative in the presence of convs. So we better go with the - * mode of offset and avoid the conv */ - ir_mode *mode = get_irn_mode(offset); - offset = create_conv(dbgi, offset, mode); + type_t *offset_type = skip_typeref(expression->index->base.type); + ir_mode *mode; + if (is_type_signed(offset_type)) { + mode = get_ir_mode(type_ssize_t); + } else { + mode = get_ir_mode(type_size_t); + } + offset = create_conv(dbgi, offset, mode); type_t *ref_type = skip_typeref(expression->array_ref->base.type); assert(is_type_pointer(ref_type)); @@ -2295,7 +2435,7 @@ static ir_node *array_access_to_firm( (const expression_t*) expression); type = skip_typeref(type); - return deref_address(type, addr, dbgi); + return deref_address(dbgi, type, addr); } static long get_offsetof_offset(const offsetof_expression_t *expression) @@ -2309,14 +2449,14 @@ static long get_offsetof_offset(const offsetof_expression_t *expression) /* be sure the type is constructed */ (void) get_ir_type(type); - if(designator->symbol != NULL) { + if (designator->symbol != NULL) { assert(is_type_compound(type)); symbol_t *symbol = designator->symbol; declaration_t *declaration = type->compound.declaration; declaration_t *iter = declaration->scope.declarations; for( ; iter != NULL; iter = iter->next) { - if(iter->symbol == symbol) { + if (iter->symbol == symbol) { break; } } @@ -2391,14 +2531,14 @@ static ir_node *compound_literal_to_firm( static ir_node *sizeof_to_firm(const typeprop_expression_t *expression) { type_t *type = expression->type; - if(type == NULL) { + if (type == NULL) { type = expression->tp_expression->base.type; assert(type != NULL); } type = skip_typeref(type); /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */ - if(is_type_array(type) && type->array.is_vla + if (is_type_array(type) && type->array.is_vla && expression->tp_expression != NULL) { expression_to_firm(expression->tp_expression); } @@ -2412,7 +2552,7 @@ static ir_node *sizeof_to_firm(const typeprop_expression_t *expression) static ir_node *alignof_to_firm(const typeprop_expression_t *expression) { type_t *type = expression->type; - if(type == NULL) { + if (type == NULL) { /* beware: if expression is a variable reference, return the alignment of the variable. */ const expression_t *tp_expression = expression->tp_expression; @@ -2431,29 +2571,35 @@ static ir_node *alignof_to_firm(const typeprop_expression_t *expression) } static void init_ir_types(void); + long fold_constant(const expression_t *expression) { + bool constant_folding_old = constant_folding; + constant_folding = true; + init_ir_types(); assert(is_constant_expression(expression)); ir_graph *old_current_ir_graph = current_ir_graph; - if(current_ir_graph == NULL) { + if (current_ir_graph == NULL) { current_ir_graph = get_const_code_irg(); } ir_node *cnst = expression_to_firm(expression); current_ir_graph = old_current_ir_graph; - if(!is_Const(cnst)) { + if (!is_Const(cnst)) { panic("couldn't fold constant\n"); } tarval *tv = get_Const_tarval(cnst); - if(!tarval_is_long(tv)) { + if (!tarval_is_long(tv)) { panic("result of constant folding is not integer\n"); } + constant_folding = constant_folding_old; + return get_tarval_long(tv); } @@ -2462,10 +2608,13 @@ static ir_node *conditional_to_firm(const conditional_expression_t *expression) dbg_info *const dbgi = get_dbg_info(&expression->base.source_position); /* first try to fold a constant condition */ - if(is_constant_expression(expression->condition)) { + if (is_constant_expression(expression->condition)) { long val = fold_constant(expression->condition); - if(val) { - return expression_to_firm(expression->true_expression); + if (val) { + expression_t *true_expression = expression->true_expression; + if (true_expression == NULL) + true_expression = expression->condition; + return expression_to_firm(true_expression); } else { return expression_to_firm(expression->false_expression); } @@ -2476,7 +2625,8 @@ static ir_node *conditional_to_firm(const conditional_expression_t *expression) /* create the true block */ ir_node *true_block = new_immBlock(); - ir_node *true_val = expression_to_firm(expression->true_expression); + ir_node *true_val = expression->true_expression != NULL ? + expression_to_firm(expression->true_expression) : NULL; ir_node *true_jmp = new_Jmp(); /* create the false block */ @@ -2487,7 +2637,17 @@ static ir_node *conditional_to_firm(const conditional_expression_t *expression) /* create the condition evaluation */ set_cur_block(cur_block); - create_condition_evaluation(expression->condition, true_block, false_block); + ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block); + if (expression->true_expression == NULL) { + if (cond_expr != NULL) { + true_val = cond_expr; + } else { + /* Condition ended with a short circuit (&&, ||, !) operation. + * Generate a "1" as value for the true branch. */ + ir_mode *const mode = mode_Is; + true_val = new_Const(mode, get_mode_one(mode)); + } + } mature_immBlock(true_block); mature_immBlock(false_block); @@ -2509,6 +2669,9 @@ static ir_node *conditional_to_firm(const conditional_expression_t *expression) return val; } +/** + * Returns an IR-node representing the address of a field. + */ static ir_node *select_addr(const select_expression_t *expression) { dbg_info *dbgi = get_dbg_info(&expression->base.source_position); @@ -2535,13 +2698,20 @@ static ir_node *select_addr(const select_expression_t *expression) static ir_node *select_to_firm(const select_expression_t *expression) { - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *addr = select_addr(expression); - type_t *type = revert_automatic_type_conversion( + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + ir_node *addr = select_addr(expression); + type_t *type = revert_automatic_type_conversion( (const expression_t*) expression); - type = skip_typeref(type); + type = skip_typeref(type); + + declaration_t *entry = expression->compound_entry; + type_t *entry_type = skip_typeref(entry->type); + + if (entry_type->kind == TYPE_BITFIELD) { + return bitfield_extract_to_firm(expression, addr); + } - return deref_address(type, addr, dbgi); + return deref_address(dbgi, type, addr); } /* Values returned by __builtin_classify_type. */ @@ -2698,14 +2868,17 @@ static ir_node *va_start_expression_to_firm( static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr) { - type_t *const type = expr->base.type; - ir_node *const ap = expression_to_firm(expr->ap); - dbg_info *const dbgi = get_dbg_info(&expr->base.source_position); - ir_node *const res = deref_address(type, ap, dbgi); + type_t *const type = expr->base.type; + expression_t *const ap_expr = expr->ap; + ir_node *const ap_addr = expression_to_addr(ap_expr); + ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr); + dbg_info *const dbgi = get_dbg_info(&expr->base.source_position); + ir_node *const res = deref_address(dbgi, type, ap); - ir_node *const cnst = get_type_size(expr->base.type); - ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data); - set_value_for_expression(expr->ap, add); + ir_node *const cnst = get_type_size(expr->base.type); + ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data); + + set_value_for_expression_addr(ap_expr, add, ap_addr); return res; } @@ -2716,6 +2889,9 @@ static ir_node *dereference_addr(const unary_expression_t *const expression) return expression_to_firm(expression->value); } +/** + * Returns a IR-node representing an lvalue of the given expression. + */ static ir_node *expression_to_addr(const expression_t *expression) { switch(expression->kind) { @@ -2759,8 +2935,20 @@ static ir_node *builtin_prefetch_to_firm( return NULL; } +/** + * creates firm nodes for an expression. The difference between this function + * and expression_to_firm is, that this version might produce mode_b nodes + * instead of mode_Is. + */ static ir_node *_expression_to_firm(const expression_t *expression) { +#ifndef NDEBUG + if (!constant_folding) { + assert(!expression->base.transformed); + ((expression_t*) expression)->base.transformed = true; + } +#endif + switch(expression->kind) { case EXPR_CHARACTER_CONSTANT: return character_constant_to_firm(&expression->conste); @@ -2818,50 +3006,72 @@ static ir_node *_expression_to_firm(const expression_t *expression) panic("invalid expression found"); } -static ir_node *expression_to_firm(const expression_t *expression) +static bool produces_mode_b(const expression_t *expression) { - ir_node *res = _expression_to_firm(expression); + switch (expression->kind) { + case EXPR_BINARY_EQUAL: + case EXPR_BINARY_NOTEQUAL: + case EXPR_BINARY_LESS: + case EXPR_BINARY_LESSEQUAL: + case EXPR_BINARY_GREATER: + case EXPR_BINARY_GREATEREQUAL: + case EXPR_BINARY_ISGREATER: + case EXPR_BINARY_ISGREATEREQUAL: + case EXPR_BINARY_ISLESS: + case EXPR_BINARY_ISLESSEQUAL: + case EXPR_BINARY_ISLESSGREATER: + case EXPR_BINARY_ISUNORDERED: + case EXPR_UNARY_NOT: + return true; - if(res != NULL && get_irn_mode(res) == mode_b) { - ir_mode *mode = get_ir_mode(expression->base.type); - if(is_Const(res)) { - if(is_Const_null(res)) { - return new_Const_long(mode, 0); - } else { - assert(is_Const_one(res)); - return new_Const_long(mode, 1); - } - } + case EXPR_BINARY_BUILTIN_EXPECT: + return produces_mode_b(expression->binary.left); + case EXPR_BINARY_COMMA: + return produces_mode_b(expression->binary.right); - dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - return produce_condition_result(expression, dbgi); + default: + return false; } - - return res; } -static ir_node *expression_to_modeb(const expression_t *expression) +static ir_node *expression_to_firm(const expression_t *expression) { - ir_node *res = _expression_to_firm(expression); - res = create_conv(NULL, res, mode_b); + if (!produces_mode_b(expression)) { + ir_node *res = _expression_to_firm(expression); + assert(res == NULL || get_irn_mode(res) != mode_b); + return res; + } - return res; + if (is_constant_expression(expression)) { + ir_node *res = _expression_to_firm(expression); + ir_mode *mode = get_ir_mode(expression->base.type); + assert(is_Const(res)); + if (is_Const_null(res)) { + return new_Const_long(mode, 0); + } else { + return new_Const_long(mode, 1); + } + } + + /* we have to produce a 0/1 from the mode_b expression */ + dbg_info *dbgi = get_dbg_info(&expression->base.source_position); + return produce_condition_result(expression, dbgi); } /** * create a short-circuit expression evaluation that tries to construct * efficient control flow structures for &&, || and ! expressions */ -static void create_condition_evaluation(const expression_t *expression, - ir_node *true_block, - ir_node *false_block) +static ir_node *create_condition_evaluation(const expression_t *expression, + ir_node *true_block, + ir_node *false_block) { switch(expression->kind) { case EXPR_UNARY_NOT: { const unary_expression_t *unary_expression = &expression->unary; create_condition_evaluation(unary_expression->value, false_block, true_block); - return; + return NULL; } case EXPR_BINARY_LOGICAL_AND: { const binary_expression_t *binary_expression = &expression->binary; @@ -2875,7 +3085,7 @@ static void create_condition_evaluation(const expression_t *expression, set_cur_block(extra_block); create_condition_evaluation(binary_expression->right, true_block, false_block); - return; + return NULL; } case EXPR_BINARY_LOGICAL_OR: { const binary_expression_t *binary_expression = &expression->binary; @@ -2889,24 +3099,25 @@ static void create_condition_evaluation(const expression_t *expression, set_cur_block(extra_block); create_condition_evaluation(binary_expression->right, true_block, false_block); - return; + return NULL; } default: break; } dbg_info *dbgi = get_dbg_info(&expression->base.source_position); - ir_node *condition = expression_to_modeb(expression); + ir_node *cond_expr = _expression_to_firm(expression); + ir_node *condition = create_conv(NULL, cond_expr, mode_b); ir_node *cond = new_d_Cond(dbgi, condition); ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true); ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false); /* set branch prediction info based on __builtin_expect */ - if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) { + if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) { long cnst = fold_constant(expression->binary.right); cond_jmp_predicate pred; - if(cnst == 0) { + if (cnst == 0) { pred = COND_JMP_PRED_FALSE; } else { pred = COND_JMP_PRED_TRUE; @@ -2915,9 +3126,12 @@ static void create_condition_evaluation(const expression_t *expression, } add_immBlock_pred(true_block, true_proj); - add_immBlock_pred(false_block, false_proj); + if (false_block != NULL) { + add_immBlock_pred(false_block, false_proj); + } set_cur_block(NULL); + return cond_expr; } @@ -2926,8 +3140,13 @@ static void create_declaration_entity(declaration_t *declaration, declaration_kind_t declaration_kind, ir_type *parent_type) { - ident *const id = new_id_from_str(declaration->symbol->string); type_t *const type = skip_typeref(declaration->type); + if (is_type_function(type)) { + (void) get_function_entity(declaration); + return; + } + + ident *const id = new_id_from_str(declaration->symbol->string); ir_type *const irtype = get_ir_type(type); dbg_info *const dbgi = get_dbg_info(&declaration->source_position); ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi); @@ -2936,12 +3155,12 @@ static void create_declaration_entity(declaration_t *declaration, declaration->v.entity = entity; set_entity_variability(entity, variability_uninitialized); set_entity_ld_ident(entity, create_ld_ident(entity, declaration)); - if(parent_type == get_tls_type()) + if (parent_type == get_tls_type()) set_entity_allocation(entity, allocation_automatic); - else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE) + else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE) set_entity_allocation(entity, allocation_static); - if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { + if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { set_entity_volatility(entity, volatility_is_volatile); } } @@ -2970,9 +3189,9 @@ static __attribute__((unused)) void debug_print_type_path(const type_path_t *pat const type_path_entry_t *entry = & path->path[i]; type_t *type = skip_typeref(entry->type); - if(is_type_compound(type)) { + if (is_type_compound(type)) { fprintf(stderr, ".%s", entry->compound_entry->symbol->string); - } else if(is_type_array(type)) { + } else if (is_type_array(type)) { fprintf(stderr, "[%zd]", entry->index); } else { fprintf(stderr, "-INVALID-"); @@ -3020,7 +3239,7 @@ static ir_initializer_t *get_initializer_entry(type_path_t *path) assert(is_type_compound(top_type) || is_type_array(top_type)); - if(ARR_LEN(path->path) == 0) { + if (ARR_LEN(path->path) == 0) { return NULL; } else { type_path_entry_t *top = get_type_path_top(path); @@ -3043,14 +3262,14 @@ static void descend_into_subtype(type_path_t *path) size_t len; - if(is_type_compound(top_type)) { + if (is_type_compound(top_type)) { declaration_t *declaration = top_type->compound.declaration; declaration_t *entry = declaration->scope.declarations; top->compound_entry = entry; top->index = 0; len = get_compound_size(&top_type->compound); - if(entry != NULL) + if (entry != NULL) path->top_type = entry->type; } else { assert(is_type_array(top_type)); @@ -3060,13 +3279,13 @@ static void descend_into_subtype(type_path_t *path) path->top_type = top_type->array.element_type; len = top_type->array.size; } - if(initializer == NULL + if (initializer == NULL || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) { initializer = create_initializer_compound(len); /* we have to set the entry at the 2nd latest path entry... */ size_t path_len = ARR_LEN(path->path); assert(path_len >= 1); - if(path_len > 1) { + if (path_len > 1) { type_path_entry_t *entry = & path->path[path_len-2]; ir_initializer_t *tinitializer = entry->initializer; set_initializer_compound_value(tinitializer, entry->index, @@ -3096,7 +3315,7 @@ static void walk_designator(type_path_t *path, const designator_t *designator) type_t *orig_type = top->type; type_t *type = skip_typeref(orig_type); - if(designator->symbol != NULL) { + if (designator->symbol != NULL) { assert(is_type_compound(type)); size_t index = 0; symbol_t *symbol = designator->symbol; @@ -3104,7 +3323,7 @@ static void walk_designator(type_path_t *path, const designator_t *designator) declaration_t *declaration = type->compound.declaration; declaration_t *iter = declaration->scope.declarations; for( ; iter != NULL; iter = iter->next, ++index) { - if(iter->symbol == symbol) { + if (iter->symbol == symbol) { break; } } @@ -3123,7 +3342,7 @@ static void walk_designator(type_path_t *path, const designator_t *designator) long index = fold_constant(array_index); assert(index >= 0); #ifndef NDEBUG - if(type->array.size_constant == 1) { + if (type->array.size_constant == 1) { long array_size = type->array.size; assert(index < array_size); } @@ -3135,7 +3354,7 @@ static void walk_designator(type_path_t *path, const designator_t *designator) } path->top_type = orig_type; - if(designator->next != NULL) { + if (designator->next != NULL) { descend_into_subtype(path); } } @@ -3145,7 +3364,7 @@ static void walk_designator(type_path_t *path, const designator_t *designator) static void advance_current_object(type_path_t *path) { - if(path->invalid) { + if (path->invalid) { /* TODO: handle this... */ panic("invalid initializer in ast2firm (excessive elements)"); return; @@ -3154,15 +3373,15 @@ static void advance_current_object(type_path_t *path) type_path_entry_t *top = get_type_path_top(path); type_t *type = skip_typeref(top->type); - if(is_type_union(type)) { + if (is_type_union(type)) { top->compound_entry = NULL; - } else if(is_type_struct(type)) { + } else if (is_type_struct(type)) { declaration_t *entry = top->compound_entry; top->index++; entry = entry->next; top->compound_entry = entry; - if(entry != NULL) { + if (entry != NULL) { path->top_type = entry->type; return; } @@ -3170,7 +3389,7 @@ static void advance_current_object(type_path_t *path) assert(is_type_array(type)); top->index++; - if(!type->array.size_constant || top->index < type->array.size) { + if (!type->array.size_constant || top->index < type->array.size) { return; } } @@ -3179,7 +3398,7 @@ static void advance_current_object(type_path_t *path) * can ascend in the type hierarchy and continue with another subobject */ size_t len = ARR_LEN(path->path); - if(len > 1) { + if (len > 1) { ascend_from_subtype(path); advance_current_object(path); } else { @@ -3214,19 +3433,19 @@ static ir_initializer_t *create_ir_initializer_list( for(size_t i = 0; i < initializer->len; ++i) { const initializer_t *sub_initializer = initializer->initializers[i]; - if(sub_initializer->kind == INITIALIZER_DESIGNATOR) { + if (sub_initializer->kind == INITIALIZER_DESIGNATOR) { walk_designator(&path, sub_initializer->designator.designator); continue; } - if(sub_initializer->kind == INITIALIZER_VALUE) { + if (sub_initializer->kind == INITIALIZER_VALUE) { /* we might have to descend into types until we're at a scalar * type */ while(true) { type_t *orig_top_type = path.top_type; type_t *top_type = skip_typeref(orig_top_type); - if(is_type_scalar(top_type)) + if (is_type_scalar(top_type)) break; descend_into_subtype(&path); } @@ -3258,16 +3477,17 @@ static ir_initializer_t *create_ir_initializer_string( type = skip_typeref(type); size_t string_len = initializer->string.size; - assert(type->kind == TYPE_ARRAY && type->array.size_constant); + assert(type->kind == TYPE_ARRAY); + assert(type->array.size_constant); size_t len = type->array.size; ir_initializer_t *irinitializer = create_initializer_compound(len); const char *string = initializer->string.begin; - ir_mode *mode = get_type_mode(ir_type_const_char); + ir_mode *mode = get_ir_mode(type->array.element_type); for(size_t i = 0; i < len; ++i) { char c = 0; - if(i < string_len) + if (i < string_len) c = string[i]; tarval *tv = new_tarval_from_long(c, mode); @@ -3283,7 +3503,8 @@ static ir_initializer_t *create_ir_initializer_wide_string( const initializer_wide_string_t *initializer, type_t *type) { size_t string_len = initializer->string.size; - assert(type->kind == TYPE_ARRAY && type->array.size_constant); + assert(type->kind == TYPE_ARRAY); + assert(type->array.size_constant); size_t len = type->array.size; ir_initializer_t *irinitializer = create_initializer_compound(len); @@ -3292,7 +3513,7 @@ static ir_initializer_t *create_ir_initializer_wide_string( for(size_t i = 0; i < len; ++i) { wchar_rep_t c = 0; - if(i < string_len) { + if (i < string_len) { c = string[i]; } tarval *tv = new_tarval_from_long(c, mode); @@ -3344,7 +3565,7 @@ static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi, assert(is_compound_type(type)); int n_members; - if(is_Array_type(type)) { + if (is_Array_type(type)) { assert(has_array_upper_bound(type, 0)); n_members = get_array_upper_bound_int(type, 0); } else { @@ -3354,7 +3575,7 @@ static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi, for(int i = 0; i < n_members; ++i) { ir_node *addr; ir_type *irtype; - if(is_Array_type(type)) { + if (is_Array_type(type)) { ir_entity *entity = get_array_element_entity(type); tarval *index_tv = new_tarval_from_long(i, mode_uint); ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv); @@ -3409,21 +3630,21 @@ static void create_dynamic_initializer_sub(ir_initializer_t *initializer, case IR_INITIALIZER_COMPOUND: { assert(is_compound_type(type)); int n_members; - if(is_Array_type(type)) { + if (is_Array_type(type)) { assert(has_array_upper_bound(type, 0)); n_members = get_array_upper_bound_int(type, 0); } else { n_members = get_compound_n_members(type); } - if(get_initializer_compound_n_entries(initializer) + if (get_initializer_compound_n_entries(initializer) != (unsigned) n_members) panic("initializer doesn't match compound type"); for(int i = 0; i < n_members; ++i) { ir_node *addr; ir_type *irtype; - if(is_Array_type(type)) { + if (is_Array_type(type)) { ir_entity *entity = get_array_element_entity(type); tarval *index_tv = new_tarval_from_long(i, mode_uint); ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv); @@ -3467,7 +3688,7 @@ static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi, ir_node *frame = get_irg_frame(current_ir_graph); ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity); - if(initializer->kind == INITIALIZER_VALUE) { + if (initializer->kind == INITIALIZER_VALUE) { initializer_value_t *initializer_value = &initializer->value; ir_node *value = expression_to_firm(initializer_value->value); @@ -3476,7 +3697,7 @@ static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi, return; } - if(!is_constant_initializer(initializer)) { + if (!is_constant_initializer(initializer)) { ir_initializer_t *irinitializer = create_ir_initializer(initializer, type); @@ -3525,17 +3746,19 @@ static void create_initializer_local_variable_entity(declaration_t *declaration) static void create_declaration_initializer(declaration_t *declaration) { initializer_t *initializer = declaration->init.initializer; - if(initializer == NULL) + if (initializer == NULL) return; declaration_kind_t declaration_kind = (declaration_kind_t) declaration->declaration_kind; - if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) { + if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) { create_initializer_local_variable_entity(declaration); return; } - if(initializer->kind == INITIALIZER_VALUE) { + type_t *type = skip_typeref(declaration->type); + + if (initializer->kind == INITIALIZER_VALUE) { initializer_value_t *initializer_value = &initializer->value; dbg_info *dbgi = get_dbg_info(&declaration->source_position); @@ -3543,14 +3766,18 @@ static void create_declaration_initializer(declaration_t *declaration) ir_node *value = expression_to_firm(initializer_value->value); value = do_strict_conv(dbgi, value); - if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) { + if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) { set_value(declaration->v.value_number, value); } else { assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE); ir_entity *entity = declaration->v.entity; - set_entity_variability(entity, variability_initialized); + if (type->base.qualifiers & TYPE_QUALIFIER_CONST) { + set_entity_variability(entity, variability_constant); + } else { + set_entity_variability(entity, variability_initialized); + } set_atomic_ent_value(entity, value); } } else { @@ -3559,37 +3786,52 @@ static void create_declaration_initializer(declaration_t *declaration) ir_entity *entity = declaration->v.entity; ir_initializer_t *irinitializer - = create_ir_initializer(initializer, declaration->type); + = create_ir_initializer(initializer, type); - set_entity_variability(entity, variability_initialized); + if (type->base.qualifiers & TYPE_QUALIFIER_CONST) { + set_entity_variability(entity, variability_constant); + } else { + set_entity_variability(entity, variability_initialized); + } set_entity_initializer(entity, irinitializer); } } static void create_variable_length_array(declaration_t *declaration) { + /* initializers are not allowed for VLAs */ + assert(declaration->init.initializer == NULL); + + declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY; + declaration->v.vla_base = NULL; + + /* TODO: record VLA somewhere so we create the free node when we leave + * it's scope */ +} + +static void allocate_variable_length_array(declaration_t *declaration) +{ + /* initializers are not allowed for VLAs */ + assert(declaration->init.initializer == NULL); + assert(get_cur_block() != NULL); + dbg_info *dbgi = get_dbg_info(&declaration->source_position); type_t *type = declaration->type; - ir_node *mem = get_store(); ir_type *el_type = get_ir_type(type->array.element_type); /* make sure size_node is calculated */ get_type_size(type); ir_node *elems = type->array.size_node; + ir_node *mem = get_store(); ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc); ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M); ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res); set_store(proj_m); - /* initializers are not allowed for VLAs */ - assert(declaration->init.initializer == NULL); - - declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY; + assert(declaration->declaration_kind + == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY); declaration->v.vla_base = addr; - - /* TODO: record VLA somewhere so we create the free node when we leave - * it's scope */ } /** @@ -3603,16 +3845,16 @@ static void create_local_variable(declaration_t *declaration) type_t *type = skip_typeref(declaration->type); /* is it a variable length array? */ - if(is_type_array(type) && !type->array.size_constant) { + if (is_type_array(type) && !type->array.size_constant) { create_variable_length_array(declaration); return; - } else if(is_type_array(type) || is_type_compound(type)) { + } else if (is_type_array(type) || is_type_compound(type)) { needs_entity = true; - } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { + } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { needs_entity = true; } - if(needs_entity) { + if (needs_entity) { ir_type *frame_type = get_irg_frame_type(current_ir_graph); create_declaration_entity(declaration, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, @@ -3623,8 +3865,6 @@ static void create_local_variable(declaration_t *declaration) set_irg_loc_description(current_ir_graph, next_value_number_function, declaration); ++next_value_number_function; } - - create_declaration_initializer(declaration); } static void create_local_static_variable(declaration_t *declaration) @@ -3643,7 +3883,7 @@ static void create_local_static_variable(declaration_t *declaration) ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi); - if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { + if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) { set_entity_volatility(entity, volatility_is_volatile); } @@ -3667,7 +3907,7 @@ static void create_local_static_variable(declaration_t *declaration) static void return_statement_to_firm(return_statement_t *statement) { - if(get_cur_block() == NULL) + if (get_cur_block() == NULL) return; dbg_info *dbgi = get_dbg_info(&statement->base.source_position); @@ -3676,16 +3916,16 @@ static void return_statement_to_firm(return_statement_t *statement) ir_node *in[1]; int in_len; - if(get_method_n_ress(func_irtype) > 0) { + if (get_method_n_ress(func_irtype) > 0) { ir_type *res_type = get_method_res_type(func_irtype, 0); - if(statement->value != NULL) { + if (statement->value != NULL) { ir_node *node = expression_to_firm(statement->value); node = do_strict_conv(dbgi, node); in[0] = node; } else { ir_mode *mode; - if(is_compound_type(res_type)) { + if (is_compound_type(res_type)) { mode = mode_P_data; } else { mode = get_type_mode(res_type); @@ -3695,7 +3935,7 @@ static void return_statement_to_firm(return_statement_t *statement) in_len = 1; } else { /* build return_value for its side effects */ - if(statement->value != NULL) { + if (statement->value != NULL) { expression_to_firm(statement->value); } in_len = 0; @@ -3712,7 +3952,7 @@ static void return_statement_to_firm(return_statement_t *statement) static ir_node *expression_statement_to_firm(expression_statement_t *statement) { - if(get_cur_block() == NULL) + if (get_cur_block() == NULL) return NULL; return expression_to_firm(statement->expression); @@ -3720,12 +3960,15 @@ static ir_node *expression_statement_to_firm(expression_statement_t *statement) static ir_node *compound_statement_to_firm(compound_statement_t *compound) { + declaration_t *declaration = compound->scope.declarations; + for( ; declaration != NULL; declaration = declaration->next) { + create_local_declaration(declaration); + } + ir_node *result = NULL; statement_t *statement = compound->statements; for( ; statement != NULL; statement = statement->base.next) { - //context2firm(&statement->scope); - - if(statement->base.next == NULL + if (statement->base.next == NULL && statement->kind == STATEMENT_EXPRESSION) { result = expression_statement_to_firm( &statement->expression); @@ -3778,7 +4021,9 @@ create_var: create_declaration_entity(declaration, DECLARATION_KIND_GLOBAL_VARIABLE, var_type); - set_entity_visibility(declaration->v.entity, vis); + if (!is_type_function(skip_typeref(declaration->type))) { + set_entity_visibility(declaration->v.entity, vis); + } return; @@ -3793,8 +4038,13 @@ create_var: static void create_local_declaration(declaration_t *declaration) { - if(declaration->symbol == NULL) + if (declaration->namespc != NAMESPACE_NORMAL) return; + /* construct type */ + (void) get_ir_type(declaration->type); + if (declaration->symbol == NULL) { + return; + } type_t *type = skip_typeref(declaration->type); @@ -3809,8 +4059,8 @@ static void create_local_declaration(declaration_t *declaration) case STORAGE_CLASS_NONE: case STORAGE_CLASS_AUTO: case STORAGE_CLASS_REGISTER: - if(is_type_function(type)) { - if(declaration->init.statement != NULL) { + if (is_type_function(type)) { + if (declaration->init.statement != NULL) { panic("nested functions not supported yet"); } else { get_function_entity(declaration); @@ -3820,23 +4070,59 @@ static void create_local_declaration(declaration_t *declaration) } return; case STORAGE_CLASS_ENUM_ENTRY: + /* should already be handled */ + assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY); + return; case STORAGE_CLASS_TYPEDEF: + declaration->declaration_kind = DECLARATION_KIND_TYPE; + return; case STORAGE_CLASS_THREAD: case STORAGE_CLASS_THREAD_EXTERN: case STORAGE_CLASS_THREAD_STATIC: - return; + break; } panic("invalid storage class found"); } +static void initialize_local_declaration(declaration_t *declaration) +{ + if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL) + return; + + switch ((declaration_kind_t) declaration->declaration_kind) { + case DECLARATION_KIND_LOCAL_VARIABLE: + case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: + create_declaration_initializer(declaration); + return; + + case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY: + allocate_variable_length_array(declaration); + return; + + case DECLARATION_KIND_LABEL_BLOCK: + case DECLARATION_KIND_COMPOUND_MEMBER: + case DECLARATION_KIND_GLOBAL_VARIABLE: + case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE: + case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE: + case DECLARATION_KIND_FUNCTION: + case DECLARATION_KIND_TYPE: + case DECLARATION_KIND_ENUM_ENTRY: + return; + + case DECLARATION_KIND_UNKNOWN: + panic("can't initialize unknwon declaration"); + } + panic("invalid declaration kind"); +} + static void declaration_statement_to_firm(declaration_statement_t *statement) { declaration_t *declaration = statement->declarations_begin; declaration_t *end = statement->declarations_end->next; for( ; declaration != end; declaration = declaration->next) { - if(declaration->namespc != NAMESPACE_NORMAL) + if (declaration->namespc != NAMESPACE_NORMAL) continue; - create_local_declaration(declaration); + initialize_local_declaration(declaration); } } @@ -3844,47 +4130,58 @@ static void if_statement_to_firm(if_statement_t *statement) { ir_node *cur_block = get_cur_block(); - ir_node *fallthrough_block = new_immBlock(); + ir_node *fallthrough_block = NULL; /* the true (blocks) */ - ir_node *true_block; + ir_node *true_block = NULL; if (statement->true_statement != NULL) { true_block = new_immBlock(); statement_to_firm(statement->true_statement); - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { ir_node *jmp = new_Jmp(); + if (fallthrough_block == NULL) + fallthrough_block = new_immBlock(); add_immBlock_pred(fallthrough_block, jmp); } - } else { - true_block = fallthrough_block; } /* the false (blocks) */ - ir_node *false_block; - if(statement->false_statement != NULL) { + ir_node *false_block = NULL; + if (statement->false_statement != NULL) { false_block = new_immBlock(); statement_to_firm(statement->false_statement); - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { ir_node *jmp = new_Jmp(); + if (fallthrough_block == NULL) + fallthrough_block = new_immBlock(); add_immBlock_pred(fallthrough_block, jmp); } - } else { - false_block = fallthrough_block; } /* create the condition */ - if(cur_block != NULL) { + if (cur_block != NULL) { + if (true_block == NULL || false_block == NULL) { + if (fallthrough_block == NULL) + fallthrough_block = new_immBlock(); + if (true_block == NULL) + true_block = fallthrough_block; + if (false_block == NULL) + false_block = fallthrough_block; + } + set_cur_block(cur_block); create_condition_evaluation(statement->condition, true_block, false_block); } mature_immBlock(true_block); - if(false_block != fallthrough_block) { + if (false_block != fallthrough_block && false_block != NULL) { mature_immBlock(false_block); } - mature_immBlock(fallthrough_block); + if (fallthrough_block != NULL) { + mature_immBlock(fallthrough_block); + } set_cur_block(fallthrough_block); } @@ -3892,50 +4189,60 @@ static void if_statement_to_firm(if_statement_t *statement) static void while_statement_to_firm(while_statement_t *statement) { ir_node *jmp = NULL; - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { jmp = new_Jmp(); } /* create the header block */ ir_node *header_block = new_immBlock(); - if(jmp != NULL) { + if (jmp != NULL) { add_immBlock_pred(header_block, jmp); } - /* the false block */ - ir_node *false_block = new_immBlock(); - /* the loop body */ - ir_node *body_block; - if (statement->body != NULL) { - ir_node *old_continue_label = continue_label; - ir_node *old_break_label = break_label; - continue_label = header_block; - break_label = false_block; + ir_node *old_continue_label = continue_label; + ir_node *old_break_label = break_label; + continue_label = header_block; + break_label = NULL; - body_block = new_immBlock(); - statement_to_firm(statement->body); + ir_node *body_block = new_immBlock(); + statement_to_firm(statement->body); + ir_node *false_block = break_label; - assert(continue_label == header_block); - assert(break_label == false_block); - continue_label = old_continue_label; - break_label = old_break_label; + assert(continue_label == header_block); + continue_label = old_continue_label; + break_label = old_break_label; - if(get_cur_block() != NULL) { - jmp = new_Jmp(); - add_immBlock_pred(header_block, jmp); - } - } else { - body_block = header_block; + if (get_cur_block() != NULL) { + jmp = new_Jmp(); + add_immBlock_pred(header_block, jmp); } - /* create the condition */ - set_cur_block(header_block); + /* shortcut for while(true) */ + if (is_constant_expression(statement->condition) + && fold_constant(statement->condition) != 0) { + set_cur_block(header_block); + ir_node *header_jmp = new_Jmp(); + add_immBlock_pred(body_block, header_jmp); + + keep_alive(body_block); + } else { + if (false_block == NULL) { + false_block = new_immBlock(); + } + + /* create the condition */ + set_cur_block(header_block); + + create_condition_evaluation(statement->condition, body_block, + false_block); + } - create_condition_evaluation(statement->condition, body_block, false_block); mature_immBlock(body_block); - mature_immBlock(false_block); mature_immBlock(header_block); + if (false_block != NULL) { + mature_immBlock(false_block); + } set_cur_block(false_block); } @@ -3943,54 +4250,50 @@ static void while_statement_to_firm(while_statement_t *statement) static void do_while_statement_to_firm(do_while_statement_t *statement) { ir_node *jmp = NULL; - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { jmp = new_Jmp(); } /* create the header block */ ir_node *header_block = new_immBlock(); - /* the false block */ - ir_node *false_block = new_immBlock(); - /* the loop body */ ir_node *body_block = new_immBlock(); - if(jmp != NULL) { + if (jmp != NULL) { add_immBlock_pred(body_block, jmp); } - if (statement->body != NULL) { - ir_node *old_continue_label = continue_label; - ir_node *old_break_label = break_label; - continue_label = header_block; - break_label = false_block; + ir_node *old_continue_label = continue_label; + ir_node *old_break_label = break_label; + continue_label = header_block; + break_label = NULL; - statement_to_firm(statement->body); + statement_to_firm(statement->body); + ir_node *false_block = break_label; - assert(continue_label == header_block); - assert(break_label == false_block); - continue_label = old_continue_label; - break_label = old_break_label; + assert(continue_label == header_block); + continue_label = old_continue_label; + break_label = old_break_label; - if (get_cur_block() == NULL) { - mature_immBlock(header_block); - mature_immBlock(body_block); - mature_immBlock(false_block); - return; - } + if (get_cur_block() != NULL) { + ir_node *body_jmp = new_Jmp(); + add_immBlock_pred(header_block, body_jmp); + mature_immBlock(header_block); } - ir_node *body_jmp = new_Jmp(); - add_immBlock_pred(header_block, body_jmp); - mature_immBlock(header_block); + if (false_block == NULL) { + false_block = new_immBlock(); + } /* create the condition */ set_cur_block(header_block); create_condition_evaluation(statement->condition, body_block, false_block); mature_immBlock(body_block); - mature_immBlock(false_block); mature_immBlock(header_block); + if (false_block != NULL) { + mature_immBlock(false_block); + } set_cur_block(false_block); } @@ -3998,17 +4301,22 @@ static void do_while_statement_to_firm(do_while_statement_t *statement) static void for_statement_to_firm(for_statement_t *statement) { ir_node *jmp = NULL; + + /* create declarations */ + declaration_t *declaration = statement->scope.declarations; + for( ; declaration != NULL; declaration = declaration->next) { + create_local_declaration(declaration); + } + declaration = statement->scope.declarations; + for( ; declaration != NULL; declaration = declaration->next) { + initialize_local_declaration(declaration); + } + if (get_cur_block() != NULL) { - if(statement->initialisation != NULL) { + if (statement->initialisation != NULL) { expression_to_firm(statement->initialisation); } - /* create declarations */ - declaration_t *declaration = statement->scope.declarations; - for( ; declaration != NULL; declaration = declaration->next) { - create_local_declaration(declaration); - } - jmp = new_Jmp(); } @@ -4077,7 +4385,7 @@ static void for_statement_to_firm(for_statement_t *statement) static void create_jump_statement(const statement_t *statement, ir_node *target_block) { - if(get_cur_block() == NULL) + if (get_cur_block() == NULL) return; dbg_info *dbgi = get_dbg_info(&statement->base.source_position); @@ -4087,81 +4395,138 @@ static void create_jump_statement(const statement_t *statement, set_cur_block(NULL); } -static void switch_statement_to_firm(const switch_statement_t *statement) +static ir_node *get_break_label(void) +{ + if (break_label == NULL) { + ir_node *cur_block = get_cur_block(); + break_label = new_immBlock(); + set_cur_block(cur_block); + } + return break_label; +} + +static void switch_statement_to_firm(switch_statement_t *statement) { dbg_info *dbgi = get_dbg_info(&statement->base.source_position); ir_node *expression = expression_to_firm(statement->expression); ir_node *cond = new_d_Cond(dbgi, expression); - ir_node *break_block = new_immBlock(); set_cur_block(NULL); ir_node *const old_switch_cond = current_switch_cond; ir_node *const old_break_label = break_label; const bool old_saw_default_label = saw_default_label; + saw_default_label = false; current_switch_cond = cond; - break_label = break_block; + break_label = NULL; + switch_statement_t *const old_switch = current_switch; + current_switch = statement; + + /* determine a free number for the default label */ + unsigned long num_cases = 0; + long def_nr = 0; + for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) { + if (l->expression == NULL) { + /* default case */ + continue; + } + if (l->last_case >= l->first_case) + num_cases += l->last_case - l->first_case; + if (l->last_case > def_nr) + def_nr = l->last_case; + } + + if (def_nr + 1 < 0) { + /* Bad: an overflow occurred, we cannot be sure that the + * maximum + 1 is a free number. Scan the values a second + * time to find a free number. + */ + unsigned char *bits = xmalloc((num_cases + 7) >> 3); + unsigned long i; + + memset(bits, 0, (num_cases + 7) >> 3); + for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) { + if (l->expression == NULL) { + /* default case */ + continue; + } + for (long cns = l->first_case; cns <= l->last_case; ++cns) { + if (cns >= 0 && (unsigned long)cns < num_cases) + bits[cns >> 3] |= (1 << (cns & 7)); + } + } + /* We look at the first num_cases constants: + * Either they are densed, so we took the last (num_cases) + * one, or they are non densed, so we will find one free + * there... + */ + for (i = 0; i < num_cases; ++i) + if ((bits[i >> 3] & (i & 7)) == 0) + break; + + free(bits); + def_nr = i; + } else { + ++def_nr; + } + statement->default_proj_nr = def_nr; if (statement->body != NULL) { statement_to_firm(statement->body); } - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { ir_node *jmp = new_Jmp(); - add_immBlock_pred(break_block, jmp); + add_immBlock_pred(get_break_label(), jmp); } if (!saw_default_label) { set_cur_block(get_nodes_block(cond)); ir_node *const proj = new_d_defaultProj(dbgi, cond, - MAGIC_DEFAULT_PN_NUMBER); - add_immBlock_pred(break_block, proj); + statement->default_proj_nr); + add_immBlock_pred(get_break_label(), proj); + } + + if (break_label != NULL) { + mature_immBlock(break_label); } + set_cur_block(break_label); assert(current_switch_cond == cond); - assert(break_label == break_block); + current_switch = old_switch; current_switch_cond = old_switch_cond; break_label = old_break_label; saw_default_label = old_saw_default_label; - - mature_immBlock(break_block); - set_cur_block(break_block); } static void case_label_to_firm(const case_label_statement_t *statement) { + if (statement->is_empty) + return; + dbg_info *dbgi = get_dbg_info(&statement->base.source_position); ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp()); - /* let's create a node and hope firm constant folding creates a Const - * node... */ ir_node *proj; ir_node *old_block = get_nodes_block(current_switch_cond); ir_node *block = new_immBlock(); set_cur_block(old_block); - if(statement->expression != NULL) { - long start_pn = fold_constant(statement->expression); - long end_pn = start_pn; - if (statement->end_range != NULL) { - end_pn = fold_constant(statement->end_range); - } - assert(start_pn <= end_pn); + if (statement->expression != NULL) { + long pn = statement->first_case; + long end_pn = statement->last_case; + assert(pn <= end_pn); /* create jumps for all cases in the given range */ - for (long pn = start_pn; pn <= end_pn; ++pn) { - if(pn == MAGIC_DEFAULT_PN_NUMBER) { - /* oops someone detected our cheating... */ - panic("magic default pn used"); - } + do { proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn); add_immBlock_pred(block, proj); - } + } while(pn++ < end_pn); } else { saw_default_label = true; proj = new_d_defaultProj(dbgi, current_switch_cond, - MAGIC_DEFAULT_PN_NUMBER); + current_switch->default_proj_nr); add_immBlock_pred(block, proj); } @@ -4172,7 +4537,7 @@ static void case_label_to_firm(const case_label_statement_t *statement) mature_immBlock(block); set_cur_block(block); - if(statement->statement != NULL) { + if (statement->statement != NULL) { statement_to_firm(statement->statement); } } @@ -4181,7 +4546,7 @@ static ir_node *get_label_block(declaration_t *label) { assert(label->namespc == NAMESPACE_LABEL); - if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) { + if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) { return label->v.block; } assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN); @@ -4202,7 +4567,7 @@ static void label_to_firm(const label_statement_t *statement) { ir_node *block = get_label_block(statement->label); - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { ir_node *jmp = new_Jmp(); add_immBlock_pred(block, jmp); } @@ -4210,14 +4575,14 @@ static void label_to_firm(const label_statement_t *statement) set_cur_block(block); keep_alive(block); - if(statement->statement != NULL) { + if (statement->statement != NULL) { statement_to_firm(statement->statement); } } static void goto_to_firm(const goto_statement_t *statement) { - if(get_cur_block() == NULL) + if (get_cur_block() == NULL) return; ir_node *block = get_label_block(statement->label); @@ -4227,100 +4592,248 @@ static void goto_to_firm(const goto_statement_t *statement) set_cur_block(NULL); } -typedef enum modifier_t { - ASM_MODIFIER_WRITE_ONLY = 1 << 0, - ASM_MODIFIER_READ_WRITE = 1 << 1, - ASM_MODIFIER_COMMUTATIVE = 1 << 2, - ASM_MODIFIER_EARLYCLOBBER = 1 << 3, -} modifier_t; - static void asm_statement_to_firm(const asm_statement_t *statement) { - (void) statement; - fprintf(stderr, "WARNING asm not implemented yet!\n"); -#if 0 bool needs_memory = false; + if (statement->is_volatile) { + needs_memory = true; + } + size_t n_clobbers = 0; asm_clobber_t *clobber = statement->clobbers; for( ; clobber != NULL; clobber = clobber->next) { - if(strcmp(clobber->clobber, "memory") == 0) { + const char *clobber_str = clobber->clobber.begin; + + if (!be_is_valid_clobber(clobber_str)) { + errorf(&statement->base.source_position, + "invalid clobber '%s' specified", clobber->clobber); + continue; + } + + if (strcmp(clobber_str, "memory") == 0) { needs_memory = true; continue; } - ident *id = new_id_from_str(clobber->clobber); + ident *id = new_id_from_str(clobber_str); obstack_ptr_grow(&asm_obst, id); ++n_clobbers; } assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*)); ident **clobbers = NULL; - if(n_clobbers > 0) { + if (n_clobbers > 0) { clobbers = obstack_finish(&asm_obst); } - /* find and count input and output constraints */ - asm_constraint_t *constraint = statement->inputs; - for( ; constraint != NULL; constraint = constraint->next) { - int modifiers = 0; - bool supports_memop = false; - for(const char *c = constraint->constraints; *c != 0; ++c) { - /* TODO: improve error messages */ - switch(*c) { - case '?': - case '!': - panic("multiple alternative assembler constraints not " - "supported"); - case 'm': - case 'o': - case 'V': - case '<': - case '>': - case 'X': - supports_memop = true; - obstack_1grow(&asm_obst, *c); - break; - case '=': - if(modifiers & ASM_MODIFIER_READ_WRITE) - panic("inconsistent register constraints"); - modifiers |= ASM_MODIFIER_WRITE_ONLY; - break; - case '+': - if(modifiers & ASM_MODIFIER_WRITE_ONLY) - panic("inconsistent register constraints"); - modifiers |= ASM_MODIFIER_READ_WRITE; - break; - case '&': - modifiers |= ASM_MODIFIER_EARLYCLOBBER; - panic("early clobber assembler constraint not supported yet"); - break; - case '%': - modifiers |= ASM_MODIFIER_COMMUTATIVE; - panic("commutative assembler constraint not supported yet"); - break; - case '#': - /* skip register preferences stuff... */ - while(*c != 0 && *c != ',') - ++c; - break; - case '*': - /* skip register preferences stuff... */ - ++c; - break; - default: - obstack_1grow(&asm_obst, *c); - break; + size_t n_inputs = 0; + asm_argument_t *argument = statement->inputs; + for ( ; argument != NULL; argument = argument->next) + n_inputs++; + size_t n_outputs = 0; + argument = statement->outputs; + for ( ; argument != NULL; argument = argument->next) + n_outputs++; + + unsigned next_pos = 0; + + ir_node *ins[n_inputs + n_outputs + 1]; + size_t in_size = 0; + + ir_asm_constraint tmp_in_constraints[n_outputs]; + + const expression_t *out_exprs[n_outputs]; + ir_node *out_addrs[n_outputs]; + size_t out_size = 0; + + argument = statement->outputs; + for ( ; argument != NULL; argument = argument->next) { + const char *constraints = argument->constraints.begin; + asm_constraint_flags_t asm_flags + = be_parse_asm_constraints(constraints); + + if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) { + errorf(&statement->base.source_position, + "some constraints in '%s' are not supported", constraints); + continue; + } + if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) { + errorf(&statement->base.source_position, + "some constraints in '%s' are invalid", constraints); + continue; + } + if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) { + errorf(&statement->base.source_position, + "no write flag specified for output constraints '%s'", + constraints); + continue; + } + + unsigned pos = next_pos++; + if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE) + || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) { + expression_t *expr = argument->expression; + ir_node *addr = expression_to_addr(expr); + /* in+output, construct an artifical same_as constraint on the + * input */ + if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) { + char buf[64]; + ir_node *value = get_value_from_lvalue(expr, addr); + + snprintf(buf, sizeof(buf), "%d", pos); + + ir_asm_constraint constraint; + constraint.pos = pos; + constraint.constraint = new_id_from_str(buf); + constraint.mode = get_ir_mode(expr->base.type); + tmp_in_constraints[in_size] = constraint; + ins[in_size] = value; + + ++in_size; } + + out_exprs[out_size] = expr; + out_addrs[out_size] = addr; + ++out_size; + } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) { + /* pure memory ops need no input (but we have to make sure we + * attach to the memory) */ + assert(! (asm_flags & + (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE + | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER))); + needs_memory = true; + + /* we need to attach the address to the inputs */ + expression_t *expr = argument->expression; + + ir_asm_constraint constraint; + constraint.pos = pos; + constraint.constraint = new_id_from_str(constraints); + constraint.mode = NULL; + tmp_in_constraints[in_size] = constraint; + + ins[in_size] = expression_to_addr(expr); + ++in_size; + continue; + } else { + errorf(&statement->base.source_position, + "only modifiers but no place set in constraints '%s'", + constraints); + continue; } - obstack_1grow(&asm_obst, '\0'); - const char *constraint_string = obstack_finish(&asm_obst); - needs_memory |= supports_memop; - if(supports_memop) { + ir_asm_constraint constraint; + constraint.pos = pos; + constraint.constraint = new_id_from_str(constraints); + constraint.mode = get_ir_mode(argument->expression->base.type); + + obstack_grow(&asm_obst, &constraint, sizeof(constraint)); + } + assert(obstack_object_size(&asm_obst) + == out_size * sizeof(ir_asm_constraint)); + ir_asm_constraint *output_constraints = obstack_finish(&asm_obst); + + obstack_grow(&asm_obst, tmp_in_constraints, + in_size * sizeof(tmp_in_constraints[0])); + /* find and count input and output arguments */ + argument = statement->inputs; + for( ; argument != NULL; argument = argument->next) { + const char *constraints = argument->constraints.begin; + asm_constraint_flags_t asm_flags + = be_parse_asm_constraints(constraints); + + if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) { + errorf(&statement->base.source_position, + "some constraints in '%s' are not supported", constraints); + continue; + } + if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) { + errorf(&statement->base.source_position, + "some constraints in '%s' are invalid", constraints); + continue; } + if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) { + errorf(&statement->base.source_position, + "write flag specified for input constraints '%s'", + constraints); + continue; + } + + ir_node *input; + if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE) + || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) { + /* we can treat this as "normal" input */ + input = expression_to_firm(argument->expression); + } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) { + /* pure memory ops need no input (but we have to make sure we + * attach to the memory) */ + assert(! (asm_flags & + (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE + | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER))); + needs_memory = true; + input = expression_to_addr(argument->expression); + } else { + errorf(&statement->base.source_position, + "only modifiers but no place set in constraints '%s'", + constraints); + continue; + } + + ir_asm_constraint constraint; + constraint.pos = next_pos++; + constraint.constraint = new_id_from_str(constraints); + constraint.mode = get_irn_mode(input); + + obstack_grow(&asm_obst, &constraint, sizeof(constraint)); + ins[in_size++] = input; + } + + if (needs_memory) { + ir_asm_constraint constraint; + constraint.pos = next_pos++; + constraint.constraint = new_id_from_str(""); + constraint.mode = mode_M; + + obstack_grow(&asm_obst, &constraint, sizeof(constraint)); + ins[in_size++] = get_store(); + } + + assert(obstack_object_size(&asm_obst) + == in_size * sizeof(ir_asm_constraint)); + ir_asm_constraint *input_constraints = obstack_finish(&asm_obst); + + /* create asm node */ + dbg_info *dbgi = get_dbg_info(&statement->base.source_position); + + ident *asm_text = new_id_from_str(statement->asm_text.begin); + + ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints, + out_size, output_constraints, + n_clobbers, clobbers, asm_text); + + if (statement->is_volatile) { + set_irn_pinned(node, op_pin_state_pinned); + } else { + set_irn_pinned(node, op_pin_state_floats); + } + + /* create output projs & connect them */ + if (needs_memory) { + ir_node *projm = new_Proj(node, mode_M, out_size+1); + set_store(projm); + } + + size_t i; + for (i = 0; i < out_size; ++i) { + const expression_t *out_expr = out_exprs[i]; + long pn = i; + ir_mode *mode = get_ir_mode(out_expr->base.type); + ir_node *proj = new_Proj(node, mode, pn); + ir_node *addr = out_addrs[i]; + + set_value_for_expression_addr(out_expr, proj, addr); } -#endif } static void ms_try_statement_to_firm(ms_try_statement_t *statement) { @@ -4332,8 +4845,16 @@ static void leave_statement_to_firm(leave_statement_t *statement) { errorf(&statement->base.source_position, "__leave not supported yet"); } +/** + * Transform a statement. + */ static void statement_to_firm(statement_t *statement) { +#ifndef NDEBUG + assert(!statement->base.transformed); + statement->base.transformed = true; +#endif + switch(statement->kind) { case STATEMENT_INVALID: panic("invalid statement found"); @@ -4363,7 +4884,7 @@ static void statement_to_firm(statement_t *statement) declaration_statement_to_firm(&statement->declaration); return; case STATEMENT_BREAK: - create_jump_statement(statement, break_label); + create_jump_statement(statement, get_break_label()); return; case STATEMENT_CONTINUE: create_jump_statement(statement, continue_label); @@ -4403,14 +4924,15 @@ static int count_local_declarations(const declaration_t * decl, { int count = 0; for (; decl != end; decl = decl->next) { - if(decl->namespc != NAMESPACE_NORMAL) + if (decl->namespc != NAMESPACE_NORMAL) continue; - const type_t *type = skip_typeref(decl->type); + type_t *type = skip_typeref(decl->type); + if (!decl->address_taken && is_type_scalar(type)) ++count; const initializer_t *initializer = decl->init.initializer; /* FIXME: should walk initializer hierarchies... */ - if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) { + if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) { count += count_decls_in_expression(initializer->value.value); } } @@ -4420,7 +4942,7 @@ static int count_local_declarations(const declaration_t * decl, static int count_decls_in_expression(const expression_t *expression) { int count = 0; - if(expression == NULL) + if (expression == NULL) return 0; switch((expression_kind_t) expression->base.kind) { @@ -4547,7 +5069,7 @@ static int count_decls_in_stmts(const statement_t *stmt) case STATEMENT_LABEL: { const label_statement_t *const label_stmt = &stmt->label; - if(label_stmt->statement != NULL) { + if (label_stmt->statement != NULL) { count += count_decls_in_stmts(label_stmt->statement); } break; @@ -4580,7 +5102,7 @@ static int count_decls_in_stmts(const statement_t *stmt) case STATEMENT_CASE_LABEL: { const case_label_statement_t *label = &stmt->case_label; count += count_decls_in_expression(label->expression); - if(label->statement != NULL) { + if (label->statement != NULL) { count += count_decls_in_stmts(label->statement); } break; @@ -4611,7 +5133,7 @@ static int count_decls_in_stmts(const statement_t *stmt) case STATEMENT_MS_TRY: { const ms_try_statement_t *const try_stmt = &stmt->ms_try; count += count_decls_in_stmts(try_stmt->try_statement); - if(try_stmt->except_expression != NULL) + if (try_stmt->except_expression != NULL) count += count_decls_in_expression(try_stmt->except_expression); count += count_decls_in_stmts(try_stmt->final_statement); break; @@ -4649,11 +5171,11 @@ static void initialize_function_parameters(declaration_t *declaration) bool needs_entity = parameter->address_taken; assert(!is_type_array(type)); - if(is_type_compound(type)) { + if (is_type_compound(type)) { needs_entity = true; } - if(needs_entity) { + if (needs_entity) { ir_entity *entity = get_method_value_param_ent(function_irtype, n); ident *id = new_id_from_str(parameter->symbol->string); set_entity_ident(entity, id); @@ -4664,16 +5186,22 @@ static void initialize_function_parameters(declaration_t *declaration) continue; } - ir_mode *mode = get_ir_mode(parameter->type); - long pn = n; - ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn); + ir_type *param_irtype = get_method_param_type(function_irtype, n); + ir_mode *param_mode = get_type_mode(param_irtype); + + long pn = n; + ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn); + + ir_mode *mode = get_ir_mode(type); + value = create_conv(NULL, value, mode); + value = do_strict_conv(NULL, value); parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE; parameter->v.value_number = next_value_number_function; set_irg_loc_description(current_ir_graph, next_value_number_function, parameter); ++next_value_number_function; - set_value(parameter->v.value_number, proj); + set_value(parameter->v.value_number, value); } } @@ -4712,13 +5240,43 @@ static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_mod } } +static void add_function_pointer(ir_type *segment, ir_entity *method, + const char *unique_template) +{ + ir_type *method_type = get_entity_type(method); + ident *id = id_unique(unique_template); + ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code); + + ident *ide = id_unique(unique_template); + ir_entity *ptr = new_entity(segment, ide, ptr_type); + ir_graph *irg = get_const_code_irg(); + ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code, + method, NULL); + + set_entity_compiler_generated(ptr, 1); + set_entity_variability(ptr, variability_constant); + set_atomic_ent_value(ptr, val); +} + +/** + * Create code for a function. + */ static void create_function(declaration_t *declaration) { ir_entity *function_entity = get_function_entity(declaration); - if(declaration->init.statement == NULL) + if (declaration->init.statement == NULL) return; + if (declaration->modifiers & DM_CONSTRUCTOR) { + ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS); + add_function_pointer(segment, function_entity, "constructor_ptr.%u"); + } + if (declaration->modifiers & DM_DESTRUCTOR) { + ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS); + add_function_pointer(segment, function_entity, "destructor_ptr.%u"); + } + current_function_decl = declaration; current_function_name = NULL; current_funcsig = NULL; @@ -4738,7 +5296,7 @@ static void create_function(declaration_t *declaration) /* set inline flags */ if (declaration->is_inline) set_irg_inline_property(irg, irg_inline_recomended); - handle_decl_modifier_irg(irg, declaration->decl_modifiers); + handle_decl_modifier_irg(irg, declaration->modifiers); next_value_number_function = 0; initialize_function_parameters(declaration); @@ -4748,7 +5306,7 @@ static void create_function(declaration_t *declaration) ir_node *end_block = get_irg_end_block(irg); /* do we have a return statement yet? */ - if(get_cur_block() != NULL) { + if (get_cur_block() != NULL) { type_t *type = skip_typeref(declaration->type); assert(is_type_function(type)); const function_type_t *func_type = &type->function; @@ -4760,7 +5318,7 @@ static void create_function(declaration_t *declaration) ret = new_Return(get_store(), 0, NULL); } else { ir_mode *mode; - if(is_type_scalar(return_type)) { + if (is_type_scalar(return_type)) { mode = get_ir_mode(func_type->return_type); } else { mode = mode_P_data; @@ -4799,12 +5357,12 @@ static void create_function(declaration_t *declaration) ir_type *entity_type = get_entity_type(entity); int align = get_type_alignment_bytes(entity_type); - if(align > align_all) + if (align > align_all) align_all = align; int misalign = 0; - if(align > 0) { + if (align > 0) { misalign = offset % align; - if(misalign > 0) { + if (misalign > 0) { offset += align - misalign; } } @@ -4823,16 +5381,16 @@ static void scope_to_firm(scope_t *scope) /* first pass: create declarations */ declaration_t *declaration = scope->declarations; for( ; declaration != NULL; declaration = declaration->next) { - if(declaration->namespc != NAMESPACE_NORMAL) + if (declaration->namespc != NAMESPACE_NORMAL) continue; - if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY + if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY || declaration->storage_class == STORAGE_CLASS_TYPEDEF) continue; - if(declaration->symbol == NULL) + if (declaration->symbol == NULL) continue; type_t *type = skip_typeref(declaration->type); - if(is_type_function(type)) { + if (is_type_function(type)) { get_function_entity(declaration); } else { create_global_variable(declaration); @@ -4842,16 +5400,16 @@ static void scope_to_firm(scope_t *scope) /* second pass: create code/initializers */ declaration = scope->declarations; for( ; declaration != NULL; declaration = declaration->next) { - if(declaration->namespc != NAMESPACE_NORMAL) + if (declaration->namespc != NAMESPACE_NORMAL) continue; - if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY + if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY || declaration->storage_class == STORAGE_CLASS_TYPEDEF) continue; - if(declaration->symbol == NULL) + if (declaration->symbol == NULL) continue; type_t *type = declaration->type; - if(type->kind == TYPE_FUNCTION) { + if (type->kind == TYPE_FUNCTION) { create_function(declaration); } else { assert(declaration->declaration_kind @@ -4862,6 +5420,12 @@ static void scope_to_firm(scope_t *scope) } } +static void set_be_option(const char *option) +{ + int res = firm_be_option(option); + assert(res); +} + void init_ast2firm(void) { obstack_init(&asm_obst); @@ -4871,40 +5435,38 @@ void init_ast2firm(void) id_imp = new_id_from_chars("__imp_", 6); /* OS option must be set to the backend */ - const char *s = "ia32-gasmode=linux"; switch (firm_opt.os_support) { - case OS_SUPPORT_WIN32: + case OS_SUPPORT_MINGW: create_ld_ident = create_ld_ident_win32; - s = "ia32-gasmode=mingw"; + set_be_option("ia32-gasmode=mingw"); break; case OS_SUPPORT_LINUX: create_ld_ident = create_ld_ident_linux_elf; - s = "ia32-gasmode=linux"; break; + set_be_option("ia32-gasmode=elf"); break; case OS_SUPPORT_MACHO: create_ld_ident = create_ld_ident_macho; - s = "ia32-gasmode=macho"; break; + set_be_option("ia32-gasmode=macho"); + set_be_option("ia32-stackalign=4"); + set_be_option("pic"); break; } - firm_be_option(s); /* create idents for all known runtime functions */ for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) { - predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name); + rts_idents[i] = new_id_from_str(rts_data[i].name); } + + entitymap_init(&entitymap); } static void init_ir_types(void) { static int ir_types_initialized = 0; - if(ir_types_initialized) + if (ir_types_initialized) return; ir_types_initialized = 1; - type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST); - type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE); - type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE); - ir_type_int = get_ir_type(type_int); ir_type_const_char = get_ir_type(type_const_char); ir_type_wchar_t = get_ir_type(type_wchar_t); @@ -4913,9 +5475,27 @@ static void init_ir_types(void) void exit_ast2firm(void) { + entitymap_destroy(&entitymap); obstack_free(&asm_obst, NULL); } +static void global_asm_to_firm(statement_t *s) +{ + for (; s != NULL; s = s->base.next) { + assert(s->kind == STATEMENT_ASM); + + char const *const text = s->asms.asm_text.begin; + size_t size = s->asms.asm_text.size; + + /* skip the last \0 */ + if (text[size - 1] == '\0') + --size; + + ident *const id = new_id_from_chars(text, size); + add_irp_asm(id); + } +} + void translation_unit_to_firm(translation_unit_t *unit) { /* just to be sure */ @@ -4926,4 +5506,5 @@ void translation_unit_to_firm(translation_unit_t *unit) init_ir_types(); scope_to_firm(&unit->scope); + global_asm_to_firm(unit->global_asm); }