revert commits improved performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)
Following commits are reverted:
mjsousa 0b275a2 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- increase hardcoded limit to 499
mjsousa 2228799 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- Add comments!!
mjsousa ce81fa6 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)"
The reason is that they cause regression in some cases (if function is
used as argument for function block, for example) and this is not
fixed for a long time.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2009-2011 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
* 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)
*
*/
/*
* Iterate through all declared functions and Function Blocks,
* and, for each function/FB, add a declaration of the EN and ENO
* parameters, if they have not already been explicitly declared.
*
* EN and ENO parameters declared explicitly (by the user in the source code)
* and implicitly (by the comnpiler, i.e. by this visitor class) may be
* distinguished later on by the 'method' flag in the en_param_declaration_c
* and eno_param_declaration_c objects.
*/
#ifndef _ADD_EN_ENO_PARAM_DECL_HH
#define _ADD_EN_ENO_PARAM_DECL_HH
#include "../absyntax/visitor.hh"
class add_en_eno_param_decl_c : public null_visitor_c {
public:
static symbol_c *add_to(symbol_c *tree_root);
~add_en_eno_param_decl_c(void);
private:
/* this class is a singleton. So we need a pointer to the single instance... */
static add_en_eno_param_decl_c *singleton;
/* flags to remember whether the EN and/or ENO parameters have already
* been explicitly declared by the user in the IEC 61131-3 source code we are parsing...
*/
bool en_declared;
bool eno_declared;
private:
void* iterate_list(list_c *list);
input_declarations_c *build_en_param (void);
output_declarations_c *build_eno_param(void);
private:
/***************************/
/* B 0 - Programming Model */
/***************************/
void *visit(library_c *symbol);
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol);
/* intermediate helper symbol for function_declaration */
void *visit(var_declarations_list_c *symbol);
/******************************************/
/* B 1.4.3 - Declaration & Initialisation */
/******************************************/
void *visit(input_declarations_c *symbol);
void *visit(input_declaration_list_c *symbol);
void *visit(en_param_declaration_c *symbol);
void *visit(eno_param_declaration_c *symbol);
void *visit(output_declarations_c *symbol);
void *visit(var_init_decl_list_c *symbol);
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
void *visit(function_block_declaration_c *symbol);
}; // function_param_iterator_c
#endif /* _ADD_EN_ENO_PARAM_DECL_HH */