diff -r 966f32af570d -r 2d96a47a75b1 stage4/generate_c/generate_c_inlinefcall.cc --- a/stage4/generate_c/generate_c_inlinefcall.cc Wed Oct 24 15:32:48 2012 +0100 +++ b/stage4/generate_c/generate_c_inlinefcall.cc Thu Oct 25 11:15:55 2012 +0100 @@ -1,7 +1,7 @@ /* * matiec - a compiler for the programming languages defined in IEC 61131-3 * - * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) + * Copyright (C) 2003-2012 Mario de Sousa (msousa@fe.up.pt) * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant * * This program is free software: you can redistribute it and/or modify @@ -61,15 +61,6 @@ */ symbol_c *il_default_variable_init_value; - /* Operand to the IL operation currently being processed... */ - /* These variables are used to pass data from the - * il_simple_operation_c and il_expression_c visitors - * to the il operator visitors (i.e. LD_operator_c, - * LDN_operator_c, ST_operator_c, STN_operator_c, ...) - */ - symbol_c *current_operand; - symbol_c *current_operand_type; - /* The result of the comparison IL operations (GT, EQ, LT, ...) * is a boolean variable. * This class keeps track of the current data type stored in the @@ -94,14 +85,13 @@ * scope ... */ #define IL_DEFVAR_BACK VAR_LEADER "IL_DEFVAR_BACK" - il_default_variable_c default_variable_name; - il_default_variable_c default_variable_back_name; - - symbol_c* current_array_type; - - int fcall_number; - bool generating_inlinefunction; - symbol_c *fbname; + il_default_variable_c implicit_variable_current; + + symbol_c* current_array_type; + + int fcall_number; + bool generating_inlinefunction; + symbol_c *fbname; search_varfb_instance_type_c *search_varfb_instance_type; search_var_instance_decl_c *search_var_instance_decl; @@ -113,15 +103,12 @@ public: generate_c_inlinefcall_c(stage4out_c *s4o_ptr, symbol_c *name, symbol_c *scope, const char *variable_prefix = NULL) : generate_c_typedecl_c(s4o_ptr), - default_variable_name(IL_DEFVAR, NULL), - default_variable_back_name(IL_DEFVAR_BACK, NULL) + implicit_variable_current(IL_DEFVAR, NULL) { search_varfb_instance_type = new search_varfb_instance_type_c(scope); search_var_instance_decl = new search_var_instance_decl_c (scope); this->set_variable_prefix(variable_prefix); - current_operand = NULL; - current_operand_type = NULL; il_default_variable_init_value = NULL; fcall_number = 0; fbname = name; @@ -278,60 +265,22 @@ return symbol; } - /* A helper function... */ - void CMP_operator_result_type() { - /* the data type resulting from this operation... */ - this->default_variable_name.current_type = &(this->bool_type); - } - - /* A helper function... */ - void BYTE_operator_result_type(void) { - if (get_datatype_info_c::is_ANY_INT_literal(this->default_variable_name.current_type)) { - if (get_datatype_info_c::is_ANY_INT_literal(this->current_operand_type)) - this->default_variable_name.current_type = &(this->lword_type); - else - this->default_variable_name.current_type = this->current_operand_type; - } - else if (get_datatype_info_c::is_ANY_INT_literal(this->current_operand_type)) - this->current_operand_type = this->default_variable_name.current_type; - } - - /* A helper function... */ - void NUM_operator_result_type(void) { - if (get_datatype_info_c::is_ANY_REAL_literal(this->default_variable_name.current_type)) { - if (get_datatype_info_c::is_ANY_INT_literal(this->current_operand_type) || - get_datatype_info_c::is_ANY_REAL_literal(this->current_operand_type)) - this->default_variable_name.current_type = &(this->lreal_type); - else - this->default_variable_name.current_type = this->current_operand_type; - } - else if (get_datatype_info_c::is_ANY_INT_literal(this->default_variable_name.current_type)) { - if (get_datatype_info_c::is_ANY_INT_literal(this->current_operand_type)) - this->default_variable_name.current_type = &(this->lint_type); - else if (get_datatype_info_c::is_ANY_REAL_literal(this->current_operand_type)) - this->default_variable_name.current_type = &(this->lreal_type); - else - this->default_variable_name.current_type = this->current_operand_type; - } - else if (get_datatype_info_c::is_ANY_INT_literal(this->current_operand_type) || - get_datatype_info_c::is_ANY_REAL_literal(this->current_operand_type)) - this->current_operand_type = this->default_variable_name.current_type; - } + void *print_getter(symbol_c *symbol) { unsigned int vartype = search_var_instance_decl->get_vartype(symbol); if (vartype == search_var_instance_decl_c::external_vt) - s4o.print(GET_EXTERNAL); + s4o.print(GET_EXTERNAL); else if (vartype == search_var_instance_decl_c::located_vt) - s4o.print(GET_LOCATED); + s4o.print(GET_LOCATED); else - s4o.print(GET_VAR); + s4o.print(GET_VAR); s4o.print("("); wanted_variablegeneration = complextype_base_vg; symbol->accept(*this); if (search_var_instance_decl->type_is_complex(symbol)) - s4o.print(","); + s4o.print(","); wanted_variablegeneration = complextype_suffix_vg; symbol->accept(*this); s4o.print(")"); @@ -470,29 +419,21 @@ /* | label ':' [il_incomplete_instruction] eol_list */ // SYM_REF2(il_instruction_c, label, il_instruction) void *visit(il_instruction_c *symbol) { - if (NULL != symbol->il_instruction) { - symbol->il_instruction->accept(*this); - } - return NULL; - } + /* all previous IL instructions should have the same datatype (checked in stage3), so we get the datatype from the first previous IL instruction we find */ + implicit_variable_current.datatype = (symbol->prev_il_instruction.empty())? NULL : symbol->prev_il_instruction[0]->datatype; + if (NULL != symbol->il_instruction) symbol->il_instruction->accept(*this); + implicit_variable_current.datatype = NULL; + return NULL; + } + /* | il_simple_operator [il_operand] */ //SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) void *visit(il_simple_operation_c *symbol) { - this->current_operand = symbol->il_operand; - if (NULL == this->current_operand) { - this->current_operand_type = NULL; - } else { - this->current_operand_type = this->current_operand->datatype; - if (NULL == this->current_operand_type) ERROR; - } - symbol->il_simple_operator->accept(*this); - - this->current_operand = NULL; - this->current_operand_type = NULL; - return NULL; - } + return NULL; + } + void *visit(il_function_call_c *symbol) { symbol_c* function_type_prefix = NULL; @@ -500,8 +441,6 @@ symbol_c* function_type_suffix = NULL; DECLARE_PARAM_LIST() - symbol_c *param_data_type = default_variable_name.current_type; - function_call_param_iterator_c function_call_param_iterator(symbol); function_declaration_c *f_decl = (function_declaration_c *)symbol->called_function_declaration; @@ -575,7 +514,8 @@ * use the default variable as a source of data to pass to those parameters! */ if ((param_value == NULL) && (!used_defvar) && !fp_iterator.is_en_eno_param_implicit()) { - param_value = &this->default_variable_name; + if (NULL == implicit_variable_current.datatype) ERROR; + param_value = &this->implicit_variable_current; used_defvar = true; } @@ -626,21 +566,19 @@ generate_inline(function_name, function_type_prefix, function_type_suffix, param_list, f_decl); CLEAR_PARAM_LIST() - - /* the data type resulting from this operation... */ - default_variable_name.current_type = function_type_prefix; - return NULL; - } + return NULL; + } + + /* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ //SYM_REF4(il_expression_c, il_expr_operator, il_operand, simple_instr_list, unused) void *visit(il_expression_c *symbol) { - /* We will be recursevely interpreting an instruction list, - * so we store a backup of the data type of the value currently stored - * in the default variable, and set the current data type to NULL + /* We will be recursevely interpreting an instruction list, so we store a backup of the implicit_variable_result/current. + * Notice that they will be overwriten while processing the parenthsized instruction list. */ - symbol_c *old_current_default_variable_data_type = this->default_variable_name.current_type; - this->default_variable_name.current_type = NULL; + // il_default_variable_c old_implicit_variable_current = this->implicit_variable_current; // no longer needed! + /* Pass the symbol->il_operand to the simple_instr_list visitor * using the il_default_variable_init_value parameter... @@ -653,29 +591,16 @@ this->il_default_variable_init_value = symbol->il_operand; /* Now do the parenthesised instructions... */ - /* NOTE: the following code line will get the variable - * this->default_variable_name.current_type updated! - */ + /* NOTE: the following code line will get the variable this->implicit_variable_current.datatype updated! */ symbol->simple_instr_list->accept(*this); /* Now do the operation, using the previous result! */ - /* NOTE: The result of the previous instruction list will be stored - * in a variable named IL_DEFVAR_BACK. This is done in the visitor - * to instruction_list_c objects... - */ - this->current_operand = &(this->default_variable_back_name); - this->current_operand_type = this->default_variable_back_name.current_type; - - this->default_variable_name.current_type = old_current_default_variable_data_type; - if (NULL == this->current_operand_type) ERROR; - - symbol->il_expr_operator->accept(*this); - - this->current_operand = NULL; - this->current_operand_type = NULL; - this->default_variable_back_name.current_type = NULL; - return NULL; - } + /* NOTE: Actually, we do not need to call this, as it can never be a function call, which is what we are handling here... */ + // this->implicit_variable_current.datatype = old_current_default_variable_data_type; + // symbol->il_expr_operator->accept(*this); + return NULL; + } + /* | function_name '(' eol_list [il_param_list] ')' */ // SYM_REF2(il_formal_funct_call_c, function_name, il_param_list) @@ -807,159 +732,30 @@ generate_inline(function_name, function_type_prefix, function_type_suffix, param_list, f_decl); CLEAR_PARAM_LIST() - - /* the data type resulting from this operation... */ - default_variable_name.current_type = function_type_prefix; - return NULL; - } + return NULL; + } + + /* | simple_instr_list il_simple_instruction */ // SYM_LIST(simple_instr_list_c) void *visit(simple_instr_list_c *symbol) { /* Check whether we should initiliase the il default variable... */ - if (NULL != this->il_default_variable_init_value) { - /* Yes, we must... */ - /* We will do it by instatiating a LD operator, and having this - * same generate_c_il_c class visiting it! - */ - LD_operator_c ld_oper; - il_simple_operation_c il_simple_oper(&ld_oper, this->il_default_variable_init_value); - - il_simple_oper.accept(*this); - } - - /* this parameter no longer required... */ - this->il_default_variable_init_value = NULL; + // TODO: fix the way we handle this... It is currently not working!! +// if (NULL != this->il_default_variable_init_value) implicit_variable_current = il_default_variable_init_value; + this->il_default_variable_init_value = NULL; // this parameter no longer required... iterator_visitor_c::visit(symbol); - - /* copy the result in the default variable to the variable - * used to pass the data out to the scope enclosing - * the current scope! - * - * We also need to update the data type currently stored within - * the variable used to pass the data to the outside scope... - */ - this->default_variable_back_name.current_type = this->default_variable_name.current_type; - return NULL; - } - + return NULL; + } + + // SYM_REF1(il_simple_instruction_c, il_simple_instruction, symbol_c *prev_il_instruction;) void *visit(il_simple_instruction_c *symbol) { return symbol->il_simple_instruction->accept(*this); } - void *visit(LD_operator_c *symbol) { - /* the data type resulting from this operation... */ - this->default_variable_name.current_type = this->current_operand_type; - return NULL; - } - - void *visit(LDN_operator_c *symbol) { - /* the data type resulting from this operation... */ - this->default_variable_name.current_type = this->current_operand_type; - return NULL; - } - - void *visit(AND_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(OR_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(XOR_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(ANDN_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(ORN_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(XORN_operator_c *symbol) { - if (get_datatype_info_c::is_ANY_BIT_compatible(this->default_variable_name.current_type)) { - BYTE_operator_result_type(); - } - else {ERROR;} - return NULL; - } - - void *visit(ADD_operator_c *symbol) { - if (get_datatype_info_c::is_TIME_compatible (symbol->datatype) || - get_datatype_info_c::is_ANY_DATE_compatible (symbol->datatype)) { - /* the data type resulting from this operation... */ - this->default_variable_name.current_type = this->current_operand_type; - } else { - NUM_operator_result_type(); - } - return NULL; - } - - void *visit(SUB_operator_c *symbol) { - if (get_datatype_info_c::is_TIME_compatible (symbol->datatype) || - get_datatype_info_c::is_ANY_DATE_compatible (symbol->datatype)) { - /* the data type resulting from this operation... */ - this->default_variable_name.current_type = this->current_operand_type; - } else { - NUM_operator_result_type(); - } - return NULL; - } - - void *visit(MUL_operator_c *symbol) { - if (get_datatype_info_c::is_TIME_compatible (symbol->datatype)) { - /* the data type resulting from this operation is unchanged! */ - } else { - NUM_operator_result_type(); - } - return NULL; - } - - void *visit(DIV_operator_c *symbol) { - if (get_datatype_info_c::is_TIME_compatible (symbol->datatype)) { - /* the data type resulting from this operation is unchanged! */ - } else { - NUM_operator_result_type(); - } - return NULL; - } - - void *visit(MOD_operator_c *symbol) { - NUM_operator_result_type(); - return NULL; - } - - void *visit(GT_operator_c *symbol) {CMP_operator_result_type(); return NULL;} - void *visit(GE_operator_c *symbol) {CMP_operator_result_type(); return NULL;} - void *visit(EQ_operator_c *symbol) {CMP_operator_result_type(); return NULL;} - void *visit(LT_operator_c *symbol) {CMP_operator_result_type(); return NULL;} - void *visit(LE_operator_c *symbol) {CMP_operator_result_type(); return NULL;} - void *visit(NE_operator_c *symbol) {CMP_operator_result_type(); return NULL;} + /***************************************/ /* B.3 - Language ST (Structured Text) */