Add lvalue checking for IL function and FB invocations.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt)
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
/*
* An IEC 61131-3 compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/*
* Do flow control analysis of the IEC 61131-3 code.
*
* We currently only do this for IL code.
* This class will annotate the abstract syntax tree, by filling in the
* prev_il_instruction variable in the il_instruction_c, so it points to
* the previous il_instruction_c object in the instruction list instruction_list_c.
*/
#include "../absyntax_utils/absyntax_utils.hh"
class flow_control_analysis_c: public iterator_visitor_c {
private:
search_il_label_c *search_il_label;
symbol_c *prev_il_instruction;
symbol_c *curr_il_instruction;
bool prev_il_instruction_is_JMP_or_RET;
public:
flow_control_analysis_c(symbol_c *ignore);
virtual ~flow_control_analysis_c(void);
/**************************************/
/* B 1.5 - Program organization units */
/**************************************/
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol);
/*****************************/
/* B 1.5.2 - Function blocks */
/*****************************/
void *visit(function_block_declaration_c *symbol);
/**********************/
/* B 1.5.3 - Programs */
/**********************/
void *visit(program_declaration_c *symbol);
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(configuration_declaration_c *symbol);
/****************************************/
/* B.2 - Language IL (Instruction List) */
/****************************************/
/***********************************/
/* B 2.1 Instructions and Operands */
/***********************************/
void *visit(instruction_list_c *symbol);
void *visit(il_instruction_c *symbol);
// void *visit(il_simple_operation_c *symbol);
// void *visit(il_function_call_c *symbol);
void *visit(il_expression_c *symbol);
void *visit(il_jump_operation_c *symbol);
// void *visit(il_fb_call_c *symbol);
// void *visit(il_formal_funct_call_c *symbol);
// void *visit(il_operand_list_c *symbol);
void *visit(simple_instr_list_c *symbol);
void *visit(il_simple_instruction_c*symbol);
// void *visit(il_param_list_c *symbol);
// void *visit(il_param_assignment_c *symbol);
// void *visit(il_param_out_assignment_c *symbol);
/*******************/
/* B 2.2 Operators */
/*******************/
// void *visit( LD_operator_c *symbol);
// void *visit( LDN_operator_c *symbol);
// void *visit( ST_operator_c *symbol);
// void *visit( STN_operator_c *symbol);
// void *visit( NOT_operator_c *symbol);
// void *visit( S_operator_c *symbol);
// void *visit( R_operator_c *symbol);
// void *visit( S1_operator_c *symbol);
// void *visit( R1_operator_c *symbol);
// void *visit( CLK_operator_c *symbol);
// void *visit( CU_operator_c *symbol);
// void *visit( CD_operator_c *symbol);
// void *visit( PV_operator_c *symbol);
// void *visit( IN_operator_c *symbol);
// void *visit( PT_operator_c *symbol);
// void *visit( AND_operator_c *symbol);
// void *visit( OR_operator_c *symbol);
// void *visit( XOR_operator_c *symbol);
// void *visit( ANDN_operator_c *symbol);
// void *visit( ORN_operator_c *symbol);
// void *visit( XORN_operator_c *symbol);
// void *visit( ADD_operator_c *symbol);
// void *visit( SUB_operator_c *symbol);
// void *visit( MUL_operator_c *symbol);
// void *visit( DIV_operator_c *symbol);
// void *visit( MOD_operator_c *symbol);
// void *visit( GT_operator_c *symbol);
// void *visit( GE_operator_c *symbol);
// void *visit( EQ_operator_c *symbol);
// void *visit( LT_operator_c *symbol);
// void *visit( LE_operator_c *symbol);
// void *visit( NE_operator_c *symbol);
// void *visit( CAL_operator_c *symbol);
// void *visit( CALC_operator_c *symbol);
// void *visit(CALCN_operator_c *symbol);
void *visit( RET_operator_c *symbol);
// void *visit( RETC_operator_c *symbol);
// void *visit(RETCN_operator_c *symbol);
void *visit( JMP_operator_c *symbol);
// void *visit( JMPC_operator_c *symbol);
// void *visit(JMPCN_operator_c *symbol);
/* Symbol class handled together with function call checks */
// void *visit(il_assign_operator_c *symbol, variable_name);
/* Symbol class handled together with function call checks */
// void *visit(il_assign_operator_c *symbol, option, variable_name);
}; // flow_control_analysis_c