author | mjsousa |
Wed, 15 Apr 2015 23:25:07 +0100 | |
changeset 999 | dd50a82ae8da |
parent 990 | 4c235d65afdd |
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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parents:
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* it under the terms of the GNU General Public License as published by |
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parents:
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* the Free Software Foundation, either version 3 of the License, or |
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parents:
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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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parents:
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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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Add note about How Constant Folding class is extended with a implementation constant propagation algorithm
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/* Determine the value 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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#include "../util/symtable.hh" |
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78083edf93d5
disable not yet complete constant propagation algorithm (currently brocken and producing incorrect results),
Mario de Sousa <msousa@fe.up.pt>
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|
78083edf93d5
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Mario de Sousa <msousa@fe.up.pt>
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/* For the moment we disable constant propagation algorithm as it is not yet complete, |
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* and due to this is currently brocken and producing incorrect results! |
78083edf93d5
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Mario de Sousa <msousa@fe.up.pt>
parents:
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*/ |
78083edf93d5
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Mario de Sousa <msousa@fe.up.pt>
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#define DO_CONSTANT_PROPAGATION__ 0 |
78083edf93d5
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Mario de Sousa <msousa@fe.up.pt>
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|
78083edf93d5
disable not yet complete constant propagation algorithm (currently brocken and producing incorrect results),
Mario de Sousa <msousa@fe.up.pt>
parents:
783
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53 |
|
78083edf93d5
disable not yet complete constant propagation algorithm (currently brocken and producing incorrect results),
Mario de Sousa <msousa@fe.up.pt>
parents:
783
diff
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54 |
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class constant_folding_c : public iterator_visitor_c { |
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protected: |
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int error_count; |
568
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make the compiler platform independent (i.e. no longer assume sizeof(double)==8).
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bool warning_found; |
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int current_display_error_level; |
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634269b0f104
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private: |
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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 */ |
62 |
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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Do constant propagation inside Configurations and Resources (required for support of extension: array [1..max] OF int); (Resources is still buggy)
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Do constant propagation inside Configurations and Resources (required for support of extension: array [1..max] OF int); (Resources is still buggy)
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public: |
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Do constant propagation inside Configurations and Resources (required for support of extension: array [1..max] OF int); (Resources is still buggy)
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constant_folding_c(symbol_c *symbol = NULL); |
706a152731ab
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virtual ~constant_folding_c(void); |
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int get_error_count(); |
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Do constant folding of variable's initial value (allows correct C code generation with variables in the subrange of an array declaration: ARRAY [1..max] of INT).
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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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612 | 99 |
/****************************************/ |
100 |
/* B.2 - Language IL (Instruction List) */ |
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101 |
/****************************************/ |
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102 |
/***********************************/ |
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103 |
/* B 2.1 Instructions and Operands */ |
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104 |
/***********************************/ |
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105 |
// void *visit(instruction_list_c *symbol); /* Not needed, since we inherit from iterator_visitor_c */ |
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106 |
void *visit(il_instruction_c *symbol); |
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107 |
void *visit(il_simple_operation_c *symbol); |
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108 |
//void *visit(il_function_call_c *symbol); /* TODO */ |
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109 |
void *visit(il_expression_c *symbol); |
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110 |
void *visit(il_jump_operation_c *symbol); |
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111 |
void *visit(il_fb_call_c *symbol); |
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112 |
//void *visit(il_formal_funct_call_c *symbol); /* TODO */ |
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113 |
//void *visit(il_operand_list_c *symbol); /* Not needed, since we inherit from iterator_visitor_c */ |
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114 |
void *visit(simple_instr_list_c *symbol); |
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115 |
void *visit(il_simple_instruction_c *symbol); |
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116 |
||
117 |
||
118 |
/*******************/ |
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119 |
/* B 2.2 Operators */ |
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120 |
/*******************/ |
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121 |
void *visit( LD_operator_c *symbol); |
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122 |
void *visit( LDN_operator_c *symbol); |
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123 |
void *visit( ST_operator_c *symbol); |
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124 |
void *visit( STN_operator_c *symbol); |
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125 |
void *visit( NOT_operator_c *symbol); |
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126 |
void *visit( S_operator_c *symbol); |
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127 |
void *visit( R_operator_c *symbol); |
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128 |
void *visit( S1_operator_c *symbol); |
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129 |
void *visit( R1_operator_c *symbol); |
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130 |
void *visit( CLK_operator_c *symbol); |
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131 |
void *visit( CU_operator_c *symbol); |
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132 |
void *visit( CD_operator_c *symbol); |
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133 |
void *visit( PV_operator_c *symbol); |
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134 |
void *visit( IN_operator_c *symbol); |
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135 |
void *visit( PT_operator_c *symbol); |
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136 |
void *visit( AND_operator_c *symbol); |
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137 |
void *visit( OR_operator_c *symbol); |
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138 |
void *visit( XOR_operator_c *symbol); |
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139 |
void *visit( ANDN_operator_c *symbol); |
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140 |
void *visit( ORN_operator_c *symbol); |
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141 |
void *visit( XORN_operator_c *symbol); |
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142 |
void *visit( ADD_operator_c *symbol); |
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143 |
void *visit( SUB_operator_c *symbol); |
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144 |
void *visit( MUL_operator_c *symbol); |
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145 |
void *visit( DIV_operator_c *symbol); |
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146 |
void *visit( MOD_operator_c *symbol); |
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147 |
void *visit( GT_operator_c *symbol); |
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148 |
void *visit( GE_operator_c *symbol); |
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149 |
void *visit( EQ_operator_c *symbol); |
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150 |
void *visit( LT_operator_c *symbol); |
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151 |
void *visit( LE_operator_c *symbol); |
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152 |
void *visit( NE_operator_c *symbol); |
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153 |
void *visit( CAL_operator_c *symbol); |
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154 |
void *visit( CALC_operator_c *symbol); |
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155 |
void *visit(CALCN_operator_c *symbol); |
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156 |
void *visit( RET_operator_c *symbol); |
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157 |
void *visit( RETC_operator_c *symbol); |
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158 |
void *visit(RETCN_operator_c *symbol); |
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159 |
void *visit( JMP_operator_c *symbol); |
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160 |
void *visit( JMPC_operator_c *symbol); |
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161 |
void *visit(JMPCN_operator_c *symbol); |
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162 |
/* Symbol class handled together with function call checks */ |
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163 |
// void *visit(il_assign_operator_c *symbol, variable_name); |
|
164 |
/* Symbol class handled together with function call checks */ |
|
165 |
// void *visit(il_assign_operator_c *symbol, option, variable_name); |
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166 |
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167 |
/***************************************/ |
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168 |
/* B.3 - Language ST (Structured Text) */ |
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169 |
/***************************************/ |
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/***********************/ |
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/* B 3.1 - Expressions */ |
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/***********************/ |
612 | 173 |
void *visit( or_expression_c *symbol); |
174 |
void *visit( xor_expression_c *symbol); |
|
175 |
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 | 178 |
void *visit( lt_expression_c *symbol); |
179 |
void *visit( gt_expression_c *symbol); |
|
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void *visit( le_expression_c *symbol); |
|
181 |
void *visit( ge_expression_c *symbol); |
|
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void *visit( add_expression_c *symbol); |
|
183 |
void *visit( sub_expression_c *symbol); |
|
184 |
void *visit( mul_expression_c *symbol); |
|
185 |
void *visit( div_expression_c *symbol); |
|
186 |
void *visit( mod_expression_c *symbol); |
|
187 |
void *visit( power_expression_c *symbol); |
|
188 |
void *visit( neg_expression_c *symbol); |
|
189 |
void *visit( not_expression_c *symbol); |
|
190 |
//void *visit(function_invocation_c *symbol); /* TODO */ |
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}; |
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|
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#include <deque> |
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class constant_propagation_c : public constant_folding_c { |
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public: |
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constant_propagation_c(symbol_c *symbol = NULL); |
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virtual ~constant_propagation_c(void); |
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typedef symtable_c<const_value_c> map_values_t; |
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private: |
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symbol_c *current_resource; |
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symbol_c *current_configuration; |
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map_values_t *values; |
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map_values_t var_global_values; |
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/* A stack of all the FB declarations currently being recursively constant propagated */ |
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std::deque<function_block_declaration_c *> fbs_currently_being_visited; // We use a deque instead of stack, so we can search in the stack using direct access to its elements! |
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|
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void *handle_var_list_decl(symbol_c *var_list, symbol_c *type_decl, bool is_global_var = false); |
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void *handle_var_decl (symbol_c *var_list, bool fixed_init_value); |
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// Flag to indicate whether the variables in the variable declaration list will always have a fixed value when the POU is executed! |
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// VAR CONSTANT ... END_VAR will always be true |
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// VAR ... END_VAR will always be true for functions (who initialise local variables every time they are called), but false for FBs and PROGRAMS |
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bool fixed_init_value_; |
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bool function_pou_; |
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bool is_constant(symbol_c *option); |
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bool is_retain (symbol_c *option); |
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static map_values_t inner_left_join_values(map_values_t m1, map_values_t m2); |
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|
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private: |
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232 |
/***************************/ |
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/* B 0 - Programming Model */ |
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234 |
/***************************/ |
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void *visit(library_c *symbol); |
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|
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237 |
/*********************/ |
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/* B 1.4 - Variables */ |
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239 |
/*********************/ |
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240 |
#if DO_CONSTANT_PROPAGATION__ |
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void *visit(symbolic_variable_c *symbol); |
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#endif // DO_CONSTANT_PROPAGATION__ |
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void *visit(symbolic_constant_c *symbol); |
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244 |
|
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245 |
/******************************************/ |
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246 |
/* B 1.4.3 - Declaration & Initialisation */ |
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/******************************************/ |
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void *visit( input_declarations_c *symbol); |
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void *visit( output_declarations_c *symbol); |
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void *visit( input_output_declarations_c *symbol); |
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void *visit( var_declarations_c *symbol); |
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void *visit(retentive_var_declarations_c *symbol); |
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void *visit( external_var_declarations_c *symbol); |
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void *visit( global_var_declarations_c *symbol); |
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void *visit( external_declaration_c *symbol); |
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256 |
void *visit(global_var_decl_c *symbol); |
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257 |
void *visit( var1_init_decl_c *symbol); |
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258 |
void *visit( fb_name_decl_c *symbol); |
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259 |
|
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260 |
/**************************************/ |
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261 |
/* B.1.5 - Program organization units */ |
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|
262 |
/**************************************/ |
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263 |
/***********************/ |
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|
264 |
/* B 1.5.1 - Functions */ |
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265 |
/***********************/ |
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void *visit(function_declaration_c *symbol); |
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void *visit(function_var_decls_c *symbol); |
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268 |
|
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269 |
/*****************************/ |
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270 |
/* B 1.5.2 - Function Blocks */ |
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271 |
/*****************************/ |
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272 |
void *visit(function_block_declaration_c *symbol); |
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void *visit( temp_var_decls_c *symbol); |
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void *visit( non_retentive_var_decls_c *symbol); |
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|
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276 |
/**********************/ |
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277 |
/* B 1.5.3 - Programs */ |
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278 |
/**********************/ |
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void *visit( program_declaration_c *symbol); |
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280 |
|
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281 |
/********************************/ |
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282 |
/* B 1.7 Configuration elements */ |
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283 |
/********************************/ |
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void *visit( configuration_declaration_c *symbol); |
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void *visit( resource_declaration_c *symbol); |
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void *visit( program_configuration_c *symbol); |
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void *visit( fb_task_c *symbol); |
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288 |
|
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|
289 |
|
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290 |
/****************************************/ |
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|
291 |
/* B.2 - Language IL (Instruction List) */ |
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292 |
/****************************************/ |
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/***********************************/ |
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/* B 2.1 Instructions and Operands */ |
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/***********************************/ |
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//void *visit(il_function_call_c *symbol); /* TODO */ |
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// void *visit(il_fb_call_c *symbol); /* TODO: move from constant_folding_c */ |
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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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|
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|
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/*******************/ |
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303 |
/* B 2.2 Operators */ |
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304 |
/*******************/ |
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305 |
/* 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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309 |
|
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310 |
/***************************************/ |
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311 |
/* B.3 - Language ST (Structured Text) */ |
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312 |
/***************************************/ |
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313 |
/***********************/ |
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314 |
/* B 3.1 - Expressions */ |
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|
315 |
/***********************/ |
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|
316 |
//void *visit(function_invocation_c *symbol); /* TODO */ |
774
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|
317 |
|
981
aad6aa35ce60
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|
318 |
#if DO_CONSTANT_PROPAGATION__ |
774
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|
319 |
/*********************************/ |
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|
320 |
/* B 3.2.1 Assignment Statements */ |
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|
321 |
/*********************************/ |
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322 |
void *visit(assignment_statement_c *symbol); |
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parents:
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|
323 |
|
979af2009d88
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|
324 |
/********************************/ |
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|
325 |
/* B 3.2.3 Selection Statements */ |
979af2009d88
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parents:
667
diff
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|
326 |
/********************************/ |
979af2009d88
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parents:
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diff
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|
327 |
void *visit(if_statement_c *symbol); |
780
9fbdf8a7430e
Add constant propagation algorithm for loop cycles.
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774
diff
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|
328 |
|
9fbdf8a7430e
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|
329 |
/********************************/ |
9fbdf8a7430e
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|
330 |
/* B 3.2.4 Iteration Statements */ |
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parents:
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|
331 |
/********************************/ |
9fbdf8a7430e
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Manuele Conti <conti.ma@alice.it>
parents:
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diff
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|
332 |
void *visit(for_statement_c *symbol); |
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Manuele Conti <conti.ma@alice.it>
parents:
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diff
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|
333 |
void *visit(while_statement_c *symbol); |
9fbdf8a7430e
Add constant propagation algorithm for loop cycles.
Manuele Conti <conti.ma@alice.it>
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diff
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|
334 |
void *visit(repeat_statement_c *symbol); |
792
78083edf93d5
disable not yet complete constant propagation algorithm (currently brocken and producing incorrect results),
Mario de Sousa <msousa@fe.up.pt>
parents:
783
diff
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|
335 |
#endif // DO_CONSTANT_PROPAGATION__ |
564
dabffc3086dc
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parents:
diff
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|
336 |
}; |
dabffc3086dc
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Manuele Conti <conti.ma@alice.it>
parents:
diff
changeset
|
337 |