author | Mario de Sousa <msousa@fe.up.pt> |
Fri, 09 Nov 2012 14:34:36 +0000 | |
changeset 724 | d19877568878 |
parent 667 | bd1360f29f15 |
child 774 | 979af2009d88 |
permissions | -rw-r--r-- |
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2009-2012 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2012 Manuele Conti (conti.ma@alice.it) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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|
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/* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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|
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/* Determine the data type of an constant expression. |
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* A reference to the relevant type definition is returned. |
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* |
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* For example: |
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* 2 + 3 -> returns reference |
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* 22.2 - 5 -> returns reference |
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* etc... |
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*/ |
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|
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#include <vector> |
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#include "../absyntax_utils/absyntax_utils.hh" |
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|
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|
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class constant_folding_c : public iterator_visitor_c { |
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private: |
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search_varfb_instance_type_c *search_varfb_instance_type; |
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int error_count; |
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bool warning_found; |
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int current_display_error_level; |
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/* Pointer to the previous IL instruction, which contains the current cvalue of the data stored in the IL stack, i.e. the default variable, a.k.a. accumulator */ |
54 |
symbol_c *prev_il_instruction; |
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/* the current IL operand being analyzed */ |
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symbol_c *il_operand; |
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public: |
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constant_folding_c(symbol_c *symbol = NULL); |
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virtual ~constant_folding_c(void); |
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int get_error_count(); |
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private: |
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/*********************/ |
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/* B 1.2 - Constants */ |
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/*********************/ |
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/******************************/ |
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/* B 1.2.1 - Numeric Literals */ |
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/******************************/ |
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void *visit(real_c *symbol); |
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void *visit(integer_c *symbol); |
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void *visit(neg_real_c *symbol); |
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void *visit(neg_integer_c *symbol); |
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void *visit(binary_integer_c *symbol); |
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void *visit(octal_integer_c *symbol); |
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void *visit(hex_integer_c *symbol); |
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void *visit(integer_literal_c *symbol); |
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void *visit(real_literal_c *symbol); |
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void *visit(bit_string_literal_c *symbol); |
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void *visit(boolean_literal_c *symbol); |
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void *visit(boolean_true_c *symbol); |
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void *visit(boolean_false_c *symbol); |
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/************************/ |
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/* B 1.2.3.1 - Duration */ |
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/********* **************/ |
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void *visit(fixed_point_c *symbol); |
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/****************************************/ |
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/* B.2 - Language IL (Instruction List) */ |
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/****************************************/ |
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/***********************************/ |
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/* B 2.1 Instructions and Operands */ |
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/***********************************/ |
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// void *visit(instruction_list_c *symbol); /* Not needed, since we inherit from iterator_visitor_c */ |
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void *visit(il_instruction_c *symbol); |
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void *visit(il_simple_operation_c *symbol); |
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//void *visit(il_function_call_c *symbol); /* TODO */ |
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void *visit(il_expression_c *symbol); |
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void *visit(il_jump_operation_c *symbol); |
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void *visit(il_fb_call_c *symbol); |
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//void *visit(il_formal_funct_call_c *symbol); /* TODO */ |
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//void *visit(il_operand_list_c *symbol); /* Not needed, since we inherit from iterator_visitor_c */ |
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void *visit(simple_instr_list_c *symbol); |
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void *visit(il_simple_instruction_c *symbol); |
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/*******************/ |
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/* B 2.2 Operators */ |
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/*******************/ |
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void *visit( LD_operator_c *symbol); |
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void *visit( LDN_operator_c *symbol); |
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void *visit( ST_operator_c *symbol); |
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void *visit( STN_operator_c *symbol); |
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void *visit( NOT_operator_c *symbol); |
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void *visit( S_operator_c *symbol); |
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void *visit( R_operator_c *symbol); |
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void *visit( S1_operator_c *symbol); |
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void *visit( R1_operator_c *symbol); |
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void *visit( CLK_operator_c *symbol); |
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void *visit( CU_operator_c *symbol); |
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void *visit( CD_operator_c *symbol); |
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void *visit( PV_operator_c *symbol); |
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void *visit( IN_operator_c *symbol); |
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void *visit( PT_operator_c *symbol); |
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void *visit( AND_operator_c *symbol); |
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void *visit( OR_operator_c *symbol); |
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void *visit( XOR_operator_c *symbol); |
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void *visit( ANDN_operator_c *symbol); |
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void *visit( ORN_operator_c *symbol); |
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void *visit( XORN_operator_c *symbol); |
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void *visit( ADD_operator_c *symbol); |
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void *visit( SUB_operator_c *symbol); |
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void *visit( MUL_operator_c *symbol); |
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void *visit( DIV_operator_c *symbol); |
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void *visit( MOD_operator_c *symbol); |
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void *visit( GT_operator_c *symbol); |
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void *visit( GE_operator_c *symbol); |
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void *visit( EQ_operator_c *symbol); |
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void *visit( LT_operator_c *symbol); |
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void *visit( LE_operator_c *symbol); |
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void *visit( NE_operator_c *symbol); |
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void *visit( CAL_operator_c *symbol); |
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void *visit( CALC_operator_c *symbol); |
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void *visit(CALCN_operator_c *symbol); |
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void *visit( RET_operator_c *symbol); |
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void *visit( RETC_operator_c *symbol); |
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void *visit(RETCN_operator_c *symbol); |
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void *visit( JMP_operator_c *symbol); |
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150 |
void *visit( JMPC_operator_c *symbol); |
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void *visit(JMPCN_operator_c *symbol); |
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152 |
/* Symbol class handled together with function call checks */ |
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// void *visit(il_assign_operator_c *symbol, variable_name); |
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/* Symbol class handled together with function call checks */ |
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// void *visit(il_assign_operator_c *symbol, option, variable_name); |
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/***************************************/ |
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/* B.3 - Language ST (Structured Text) */ |
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/***************************************/ |
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/***********************/ |
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/* B 3.1 - Expressions */ |
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/***********************/ |
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void *visit( or_expression_c *symbol); |
164 |
void *visit( xor_expression_c *symbol); |
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165 |
void *visit( and_expression_c *symbol); |
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void *visit( equ_expression_c *symbol); |
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void *visit(notequ_expression_c *symbol); |
612 | 168 |
void *visit( lt_expression_c *symbol); |
169 |
void *visit( gt_expression_c *symbol); |
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void *visit( le_expression_c *symbol); |
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171 |
void *visit( ge_expression_c *symbol); |
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172 |
void *visit( add_expression_c *symbol); |
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void *visit( sub_expression_c *symbol); |
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174 |
void *visit( mul_expression_c *symbol); |
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175 |
void *visit( div_expression_c *symbol); |
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void *visit( mod_expression_c *symbol); |
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177 |
void *visit( power_expression_c *symbol); |
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178 |
void *visit( neg_expression_c *symbol); |
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179 |
void *visit( not_expression_c *symbol); |
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//void *visit(function_invocation_c *symbol); /* TODO */ |
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}; |
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