Fix compare expression in constat folding class.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2009-2012 Mario de Sousa (msousa@fe.up.pt)
* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
* Copyright (C) 2012 Manuele Conti (manuele.conti@sirius-es.it)
* Copyright (C) 2012 Matteo Facchinetti (matteo.facchinetti@sirius-es.it)
*
* 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)
*
*/
#include "stage3.hh"
#include "flow_control_analysis.hh"
#include "fill_candidate_datatypes.hh"
#include "narrow_candidate_datatypes.hh"
#include "print_datatypes_error.hh"
#include "lvalue_check.hh"
#include "array_range_check.hh"
#include "constant_folding.hh"
static int constant_check(symbol_c *tree_root){
constant_folding_c constant_folding(tree_root);
tree_root->accept(constant_folding);
return constant_folding.get_error_count();
}
static int flow_control_analysis(symbol_c *tree_root){
flow_control_analysis_c flow_control_analysis(tree_root);
tree_root->accept(flow_control_analysis);
return 0;
}
/* Type safety analysis assumes that flow control analysis has already been completed,
* so be sure to call flow_control_analysis() before calling this function
*/
static int type_safety(symbol_c *tree_root){
fill_candidate_datatypes_c fill_candidate_datatypes(tree_root);
tree_root->accept(fill_candidate_datatypes);
narrow_candidate_datatypes_c narrow_candidate_datatypes(tree_root);
tree_root->accept(narrow_candidate_datatypes);
print_datatypes_error_c print_datatypes_error(tree_root);
tree_root->accept(print_datatypes_error);
return print_datatypes_error.get_error_count();
}
/* Left value checking assumes that datat type analysis has already been completed,
* so be sure to call type_safety() before calling this function
*/
static int lvalue_check(symbol_c *tree_root){
lvalue_check_c lvalue_check(tree_root);
tree_root->accept(lvalue_check);
return lvalue_check.get_error_count();
}
static int range_check(symbol_c *tree_root){
array_range_check_c array_range_check(tree_root);
tree_root->accept(array_range_check);
return array_range_check.get_error_count();
}
int stage3(symbol_c *tree_root){
int error_count = 0;
error_count += constant_check(tree_root);
error_count += flow_control_analysis(tree_root);
error_count += type_safety(tree_root);
error_count += lvalue_check(tree_root);
error_count += range_check(tree_root);
if (error_count > 0) {
fprintf(stderr, "%d error(s) found. Bailing out!\n", error_count);
return -1;
}
return 0;
}