X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast2firm.c;h=390c53b4c90eed83548e595457c5361110e5fa69;hb=91219ace689b880db697e46a6f8bb953f0f3e9ea;hp=97814fcb13b50c4c0adf012cf11e9fe994bfeb91;hpb=5266289d39f4295906e26c5e036577b7eb09b0c2;p=cparser diff --git a/ast2firm.c b/ast2firm.c index 97814fc..390c53b 100644 --- a/ast2firm.c +++ b/ast2firm.c @@ -25,6 +25,7 @@ #include #include +#include #include "ast2firm.h" @@ -43,8 +44,6 @@ #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; @@ -54,19 +53,18 @@ 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 ir_node **immature_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; @@ -95,9 +93,11 @@ 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); } @@ -218,8 +218,6 @@ 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 occurred"); @@ -338,6 +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; @@ -356,7 +369,8 @@ static ir_type *create_method_type(const function_type_t *function_type) 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); + 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; } @@ -365,6 +379,34 @@ static ir_type *create_method_type(const function_type_t *function_type) 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; } @@ -483,7 +525,7 @@ 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); @@ -741,7 +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); @@ -928,7 +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); @@ -966,6 +1007,26 @@ typedef ident* (*create_ld_ident_func)(ir_entity *entity, declaration_t *declaration); create_ld_ident_func create_ld_ident = create_ld_ident_linux_elf; +/** + * 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. * @@ -997,15 +1058,26 @@ static ir_entity *get_function_entity(declaration_t *declaration) 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)); - if (declaration->storage_class == STORAGE_CLASS_STATIC && - declaration->init.statement == NULL) { - /* this entity was declared, but never defined */ - set_entity_peculiarity(entity, peculiarity_description); - } - if (declaration->storage_class == STORAGE_CLASS_STATIC - || declaration->is_inline) { + + 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); @@ -1472,9 +1544,10 @@ 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... + * 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) { @@ -1493,17 +1566,17 @@ static ir_node *call_expression_to_firm(const call_expression_t *call) if (declaration->v.entity == rts_entities[rts_alloca]) { /* handle alloca() call */ expression_t *argument = call->arguments->expression; - ir_node *size = expression_to_firm(argument); + ir_node *size = expression_to_firm(argument); - size = create_conv(dbgi, size, get_ir_mode(type_size_t)); + 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); + 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); + ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res); return res; } @@ -1589,6 +1662,15 @@ static ir_node *call_expression_to_firm(const call_expression_t *call) result = new_d_Proj(dbgi, resproj, mode, 0); } + if (function->kind == EXPR_REFERENCE && + function->reference.declaration->modifiers & DM_NORETURN) { + /* A dead end: Keep the Call and the Block. Also place all further + * nodes into a new and unreachable block. */ + keep_alive(node); + keep_alive(get_cur_block()); + new_Block(0, NULL); + } + return result; } @@ -1596,9 +1678,9 @@ 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) @@ -1626,7 +1708,8 @@ 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) { return all_one; @@ -2057,10 +2140,8 @@ static ir_node *produce_condition_result(const expression_t *expression, mature_immBlock(one_block); mature_immBlock(zero_block); - ir_node *common_block = new_immBlock(); - add_immBlock_pred(common_block, jmp_one); - add_immBlock_pred(common_block, jmp_zero); - mature_immBlock(common_block); + ir_node *in_cf[2] = { jmp_one, jmp_zero }; + new_Block(2, in_cf); ir_node *in[2] = { one, zero }; ir_node *val = new_d_Phi(dbgi, 2, in, mode); @@ -2072,8 +2153,14 @@ static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi, ir_node *value, type_t *type) { 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); + type_t *const points_to = skip_typeref(pointer_type->points_to); + unsigned elem_size = get_type_size_const(points_to); + + /* 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; + } assert(elem_size >= 1); if (elem_size == 1) @@ -2211,12 +2298,11 @@ static ir_node *create_lazy_op(const binary_expression_t *expression) 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)) { + 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 { - assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0) - || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0)); return new_Const(mode, get_mode_one(mode)); } } @@ -2232,9 +2318,9 @@ static ir_node *create_assign_binop(const binary_expression_t *expression) 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 *right = expression_to_firm(expression->right); 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); result = create_conv(dbgi, result, left_mode); @@ -2492,6 +2578,7 @@ 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; @@ -2531,7 +2618,10 @@ static ir_node *conditional_to_firm(const conditional_expression_t *expression) if (is_constant_expression(expression->condition)) { long val = fold_constant(expression->condition); if (val) { - return expression_to_firm(expression->true_expression); + 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); } @@ -2542,7 +2632,8 @@ 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 */ @@ -2553,15 +2644,23 @@ 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); /* create the common block */ - ir_node *common_block = new_immBlock(); - add_immBlock_pred(common_block, true_jmp); - add_immBlock_pred(common_block, false_jmp); - mature_immBlock(common_block); + ir_node *in_cf[2] = { true_jmp, false_jmp }; + new_Block(2, in_cf); /* TODO improve static semantics, so either both or no values are NULL */ if (true_val == NULL || false_val == NULL) @@ -2964,28 +3063,20 @@ static ir_node *expression_to_firm(const expression_t *expression) return produce_condition_result(expression, dbgi); } -static ir_node *expression_to_modeb(const expression_t *expression) -{ - ir_node *res = _expression_to_firm(expression); - res = create_conv(NULL, res, mode_b); - - return res; -} - /** * 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; @@ -2999,7 +3090,7 @@ 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; @@ -3013,14 +3104,15 @@ 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); @@ -3044,6 +3136,7 @@ static void create_condition_evaluation(const expression_t *expression, } set_cur_block(NULL); + return cond_expr; } @@ -3389,12 +3482,13 @@ 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; @@ -3414,7 +3508,8 @@ 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); @@ -3666,6 +3761,8 @@ static void create_declaration_initializer(declaration_t *declaration) return; } + type_t *type = skip_typeref(declaration->type); + if (initializer->kind == INITIALIZER_VALUE) { initializer_value_t *initializer_value = &initializer->value; dbg_info *dbgi @@ -3681,7 +3778,11 @@ static void create_declaration_initializer(declaration_t *declaration) 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 { @@ -3690,37 +3791,52 @@ 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 */ } /** @@ -3984,10 +4100,13 @@ static void initialize_local_declaration(declaration_t *declaration) 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_VARIABLE_LENGTH_ARRAY: case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE: case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE: case DECLARATION_KIND_FUNCTION: @@ -4062,7 +4181,7 @@ static void if_statement_to_firm(if_statement_t *statement) } mature_immBlock(true_block); - if (false_block != fallthrough_block) { + if (false_block != fallthrough_block && false_block != NULL) { mature_immBlock(false_block); } if (fallthrough_block != NULL) { @@ -4112,6 +4231,8 @@ static void while_statement_to_firm(while_statement_t *statement) add_immBlock_pred(body_block, header_jmp); keep_alive(body_block); + set_cur_block(body_block); + keep_alive(get_store()); } else { if (false_block == NULL) { false_block = new_immBlock(); @@ -4255,6 +4376,7 @@ static void for_statement_to_firm(for_statement_t *statement) false_block); } else { keep_alive(header_block); + keep_alive(get_store()); jmp = new_Jmp(); add_immBlock_pred(body_block, jmp); } @@ -4291,7 +4413,7 @@ static ir_node *get_break_label(void) return break_label; } -static void switch_statement_to_firm(const switch_statement_t *statement) +static void switch_statement_to_firm(switch_statement_t *statement) { dbg_info *dbgi = get_dbg_info(&statement->base.source_position); @@ -4306,6 +4428,57 @@ static void switch_statement_to_firm(const switch_statement_t *statement) saw_default_label = false; current_switch_cond = cond; 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); @@ -4319,7 +4492,7 @@ static void switch_statement_to_firm(const switch_statement_t *statement) if (!saw_default_label) { set_cur_block(get_nodes_block(cond)); ir_node *const proj = new_d_defaultProj(dbgi, cond, - MAGIC_DEFAULT_PN_NUMBER); + statement->default_proj_nr); add_immBlock_pred(get_break_label(), proj); } @@ -4329,6 +4502,7 @@ static void switch_statement_to_firm(const switch_statement_t *statement) set_cur_block(break_label); assert(current_switch_cond == cond); + current_switch = old_switch; current_switch_cond = old_switch_cond; break_label = old_break_label; saw_default_label = old_saw_default_label; @@ -4336,37 +4510,31 @@ static void switch_statement_to_firm(const switch_statement_t *statement) 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); + 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); } @@ -4398,7 +4566,7 @@ static ir_node *get_label_block(declaration_t *label) label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK; label->v.block = block; - ARR_APP1(ir_node *, imature_blocks, block); + ARR_APP1(ir_node *, immature_blocks, block); return block; } @@ -4413,6 +4581,7 @@ static void label_to_firm(const label_statement_t *statement) } set_cur_block(block); + keep_alive(get_store()); keep_alive(block); if (statement->statement != NULL) { @@ -4432,29 +4601,31 @@ 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; } @@ -4464,68 +4635,214 @@ static void asm_statement_to_firm(const asm_statement_t *statement) 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) { @@ -4618,7 +4935,8 @@ static int count_local_declarations(const declaration_t * decl, for (; decl != end; decl = decl->next) { 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; @@ -4883,7 +5201,7 @@ static void initialize_function_parameters(declaration_t *declaration) long pn = n; ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn); - ir_mode *mode = get_ir_mode(parameter->type); + ir_mode *mode = get_ir_mode(type); value = create_conv(NULL, value, mode); value = do_strict_conv(NULL, value); @@ -4931,6 +5249,24 @@ 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. */ @@ -4941,12 +5277,21 @@ static void create_function(declaration_t *declaration) 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; - assert(imature_blocks == NULL); - imature_blocks = NEW_ARR_F(ir_node*, 0); + assert(immature_blocks == NULL); + immature_blocks = NEW_ARR_F(ir_node*, 0); int n_local_vars = get_function_n_local_vars(declaration); ir_graph *irg = new_ir_graph(function_entity, n_local_vars); @@ -4960,7 +5305,7 @@ 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); @@ -4994,22 +5339,17 @@ static void create_function(declaration_t *declaration) in[0] = new_Const(mode, get_mode_null(mode)); } else { in[0] = new_Unknown(mode); - if (warning.return_type) { - warningf(&declaration->source_position, - "missing return statement at end of non-void function '%Y'", - declaration->symbol); - } } ret = new_Return(get_store(), 1, in); } add_immBlock_pred(end_block, ret); } - for(int i = 0; i < ARR_LEN(imature_blocks); ++i) { - mature_immBlock(imature_blocks[i]); + for(int i = 0; i < ARR_LEN(immature_blocks); ++i) { + mature_immBlock(immature_blocks[i]); } - DEL_ARR_F(imature_blocks); - imature_blocks = NULL; + DEL_ARR_F(immature_blocks); + immature_blocks = NULL; mature_immBlock(first_block); mature_immBlock(end_block); @@ -5089,6 +5429,12 @@ 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); @@ -5098,22 +5444,22 @@ 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_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) { @@ -5130,10 +5476,6 @@ static void init_ir_types(void) 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); @@ -5146,6 +5488,23 @@ void exit_ast2firm(void) 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 */ @@ -5156,4 +5515,7 @@ void translation_unit_to_firm(translation_unit_t *unit) init_ir_types(); scope_to_firm(&unit->scope); + global_asm_to_firm(unit->global_asm); + + current_ir_graph = NULL; }