author | mjsousa |
Sun, 06 Jul 2014 23:31:08 +0100 | |
changeset 908 | 9e8e1ba5ca46 |
parent 693 | 51a2fa6441b9 |
child 1041 | 56ebe2a31b5b |
permissions | -rw-r--r-- |
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Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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3 |
* |
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* Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt) |
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5 |
* |
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* This program is free software: you can redistribute it and/or modify |
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Remove all remaining NULL (undefined) datatypes from IL code.
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7 |
* it under the terms of the GNU General Public License as published by |
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Remove all remaining NULL (undefined) datatypes from IL code.
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8 |
* the Free Software Foundation, either version 3 of the License, or |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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9 |
* (at your option) any later version. |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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10 |
* |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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11 |
* This program is distributed in the hope that it will be useful, |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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12 |
* 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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Remove all remaining NULL (undefined) datatypes from IL code.
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* GNU General Public License for more details. |
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parents:
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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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18 |
* |
740da3255d9d
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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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24 |
/* |
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* An IEC 61131-3 compiler. |
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26 |
* |
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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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30 |
*/ |
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|
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32 |
|
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33 |
/* |
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34 |
* Data type analysis of IL code may leave some IL instructions with an undefined datatype. |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* This visitor will set the datatype for all these symbols, so that all symbols have a well |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* defined datatype when we reach stage4. |
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Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
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37 |
* |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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* Example: |
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39 |
* ========= |
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Remove all remaining NULL (undefined) datatypes from IL code.
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40 |
* |
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Remove all remaining NULL (undefined) datatypes from IL code.
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41 |
* VAR |
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* N : INT := 99 ; |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* tonv: TON; |
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* byte_var: BYTE; |
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* tonv : TON; |
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Remove all remaining NULL (undefined) datatypes from IL code.
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46 |
* a : BYTE; |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* t : time; |
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* tod1: tod; |
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* END_VAR |
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50 |
* |
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* (0) --> Data type before executing forced_narrow_candidate_datatypes_c |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* (1) --> Data type after executing 1st pass of forced_narrow_candidate_datatypes_c |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* (2) --> Data type after executing 2nd pass of forced_narrow_candidate_datatypes_c |
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54 |
* |
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Remove all remaining NULL (undefined) datatypes from IL code.
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55 |
* --- --> NULL (undefined datatype) |
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Remove all remaining NULL (undefined) datatypes from IL code.
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* *** --> invalid_type_name_c (invalid datatype) |
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57 |
* |
681
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* (0) PASS1 (1) PASS2 (2) |
677
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59 |
* |
681
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60 |
* --- (e) *** *** CAL tonv ( |
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* PT := T#1s |
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62 |
* ) |
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63 |
* --- (e) *** *** JMP l4 |
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64 |
* |
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65 |
* --- (e) sint sint l0: LD 1 |
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66 |
* --- (e) sint sint ADD 2 |
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67 |
* --- (c) sint sint CAL tonv ( |
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68 |
* PT := T#1s |
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Do not repeat narrow algorithm for ST code, and better comments.
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69 |
* ) |
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70 |
* |
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71 |
* --- (e) sint sint LD 45 |
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72 |
* --- (c) sint sint ADD 45 |
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73 |
* |
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Mario de Sousa <msousa@fe.up.pt>
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74 |
* |
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Do not repeat narrow algorithm for ST code, and better comments.
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75 |
* --- (e) sint sint LD 3 |
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76 |
* --- (e) sint sint l1: |
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* --- (c) sint sint l2: ADD 4 |
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78 |
* int int int LD 5 |
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79 |
* int int int ST n |
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80 |
* int int int JMP l3 |
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81 |
* |
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82 |
* --- (d) --- (e) sint LD 5 |
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83 |
* --- (d) --- (e) sint SUB 6 |
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84 |
* --- (d)(e) sint sint JMP l1 |
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85 |
* |
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86 |
* --- (e) bool bool LD FALSE |
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87 |
* --- (e) bool bool NOT |
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88 |
* --- (b) bool bool RET |
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89 |
* |
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90 |
* int int int l3: |
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91 |
* int int int ST n |
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92 |
* --- (b) int int RET |
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93 |
* |
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94 |
* --- (e) *** *** l4: |
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95 |
* --- (e) *** *** CAL tonv ( |
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96 |
* PT := T#1s |
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97 |
* ) |
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98 |
* --- (a) *** *** JMP l0 |
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99 |
* --- (b) byte byte LD 88 |
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100 |
* |
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101 |
* |
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102 |
* |
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103 |
*/ |
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104 |
|
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105 |
|
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106 |
|
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107 |
#include "forced_narrow_candidate_datatypes.hh" |
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108 |
#include "datatype_functions.hh" |
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109 |
|
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|
110 |
|
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111 |
/* set to 1 to see debug info during execution */ |
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112 |
static int debug = 0; |
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113 |
|
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114 |
forced_narrow_candidate_datatypes_c::forced_narrow_candidate_datatypes_c(symbol_c *ignore) |
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115 |
:narrow_candidate_datatypes_c(ignore) { |
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116 |
} |
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117 |
|
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118 |
forced_narrow_candidate_datatypes_c::~forced_narrow_candidate_datatypes_c(void) { |
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119 |
} |
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120 |
|
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121 |
|
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122 |
|
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123 |
void forced_narrow_candidate_datatypes_c::forced_narrow_il_instruction(symbol_c *symbol, std::vector <symbol_c *> &next_il_instruction) { |
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124 |
if (NULL == symbol->datatype) { |
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125 |
if (symbol->candidate_datatypes.empty()) { |
693
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Prepare to delete search_constant_type_c -> Move the static variables from search_constant_type_c to get_datatype_info_c
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126 |
symbol->datatype = &(get_datatype_info_c::invalid_type_name); // This will occur in the situations (a) in the above example |
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127 |
// return NULL; // No need to return control to the visit() method of the base class... But we do so, just to be safe (called at the end of this function)! |
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128 |
} else { |
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129 |
if (next_il_instruction.empty()) { |
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130 |
symbol->datatype = symbol->candidate_datatypes[0]; // This will occur in the situations (b) in the above example |
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131 |
} else { |
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132 |
symbol_c *next_datatype = NULL; |
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133 |
|
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134 |
/* find the datatype of the following IL instructions (they should all be identical by now, but we don't have an assertion checking for this. */ |
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135 |
for (unsigned int i=0; i < next_il_instruction.size(); i++) |
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136 |
if (NULL != next_il_instruction[i]->datatype) |
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137 |
next_datatype = next_il_instruction[i]->datatype; |
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138 |
if (get_datatype_info_c::is_type_valid(next_datatype)) { |
958454e9e40f
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139 |
// This will occur in the situations (c) in the above example |
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140 |
symbol->datatype = symbol->candidate_datatypes[0]; |
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|
141 |
} else { |
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142 |
// This will occur in the situations (d) in the above example |
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143 |
// it is not possible to determine the exact situation in the current pass, so we can't do anything just yet. Leave it for the next time around! |
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144 |
} |
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145 |
} |
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146 |
} |
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147 |
} |
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148 |
} |
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|
149 |
|
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|
150 |
|
681
e837adad2437
Do not repeat narrow algorithm for ST code, and better comments.
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|
151 |
|
677
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152 |
/****************************************/ |
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153 |
/* B.2 - Language IL (Instruction List) */ |
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154 |
/****************************************/ |
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155 |
/***********************************/ |
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|
156 |
/* B 2.1 Instructions and Operands */ |
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|
157 |
/***********************************/ |
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|
158 |
|
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|
159 |
/*| instruction_list il_instruction */ |
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|
160 |
// SYM_LIST(instruction_list_c) |
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|
161 |
void *forced_narrow_candidate_datatypes_c::visit(instruction_list_c *symbol) { |
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|
162 |
for(int j = 0; j < 2; j++) { |
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|
163 |
for(int i = symbol->n-1; i >= 0; i--) { |
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|
164 |
symbol->elements[i]->accept(*this); |
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|
165 |
} |
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|
166 |
} |
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|
167 |
|
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|
168 |
/* Assert that this algorithm managed to remove all NULL datatypes! */ |
684
0e417d42cf6a
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parents:
681
diff
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|
169 |
/* NOTE: The forced_narrow_candidate_datatypes_c assumes that the original IEC 61131-3 source code does not have any bugs! |
0e417d42cf6a
Comment out invalid assertion.
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681
diff
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|
170 |
* This means we cannot run this assertion here, as the compiler will bork in the presence of bug in the code being compiled! Not good!! |
0e417d42cf6a
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Mario de Sousa <msousa@fe.up.pt>
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|
171 |
*/ |
0e417d42cf6a
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parents:
681
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|
172 |
/* |
677
740da3255d9d
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|
173 |
for(int i = symbol->n-1; i >= 0; i--) { |
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|
174 |
if (NULL == symbol->elements[i]->datatype) |
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|
175 |
ERROR; |
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|
176 |
} |
684
0e417d42cf6a
Comment out invalid assertion.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
177 |
*/ |
686
9b87606d4c07
Fix processing of TIME literals (submited by Andreas)
Mario de Sousa <msousa@fe.up.pt>
parents:
684
diff
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|
178 |
|
677
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|
179 |
return NULL; |
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|
180 |
} |
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|
181 |
|
740da3255d9d
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|
182 |
|
740da3255d9d
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parents:
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|
183 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
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|
184 |
/* | label ':' [il_incomplete_instruction] eol_list */ |
740da3255d9d
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parents:
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|
185 |
// SYM_REF2(il_instruction_c, label, il_instruction) |
740da3255d9d
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parents:
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|
186 |
// void *visit(instruction_list_c *symbol); |
740da3255d9d
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parents:
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|
187 |
void *forced_narrow_candidate_datatypes_c::visit(il_instruction_c *symbol) { |
691
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
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|
188 |
forced_narrow_il_instruction(symbol, symbol->next_il_instruction); |
677
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|
189 |
|
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
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|
190 |
/* return control to the visit() method of the base class! */ |
691
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
688
diff
changeset
|
191 |
return narrow_candidate_datatypes_c::visit(symbol); // This handles the situations (e) in the above example |
677
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|
192 |
} |
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parents:
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|
193 |
|
740da3255d9d
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parents:
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|
194 |
|
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Mario de Sousa <msousa@fe.up.pt>
parents:
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|
195 |
|
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|
196 |
|
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|
197 |
|
740da3255d9d
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|
198 |
/* | il_simple_operator [il_operand] */ |
740da3255d9d
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parents:
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|
199 |
// SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) |
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parents:
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|
200 |
// void *forced_narrow_candidate_datatypes_c::visit(il_simple_operation_c *symbol) |
740da3255d9d
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parents:
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|
201 |
|
740da3255d9d
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parents:
diff
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|
202 |
/* | function_name [il_operand_list] */ |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
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|
203 |
/* NOTE: The parameters 'called_function_declaration' and 'extensible_param_count' are used to pass data between the stage 3 and stage 4. */ |
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
204 |
// SYM_REF2(il_function_call_c, function_name, il_operand_list, symbol_c *called_function_declaration; int extensible_param_count;) |
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
205 |
// void *forced_narrow_candidate_datatypes_c::visit(il_function_call_c *symbol) |
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
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|
206 |
|
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
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|
207 |
/* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ |
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|
208 |
// SYM_REF3(il_expression_c, il_expr_operator, il_operand, simple_instr_list); |
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|
209 |
// void *forced_narrow_candidate_datatypes_c::visit(il_expression_c *symbol) |
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|
210 |
|
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parents:
diff
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|
211 |
/* il_jump_operator label */ |
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// SYM_REF2(il_jump_operation_c, il_jump_operator, label) |
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// void *forced_narrow_candidate_datatypes_c::visit(il_jump_operation_c *symbol) |
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/* il_call_operator prev_declared_fb_name |
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* | il_call_operator prev_declared_fb_name '(' ')' |
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* | il_call_operator prev_declared_fb_name '(' eol_list ')' |
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* | il_call_operator prev_declared_fb_name '(' il_operand_list ')' |
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* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')' |
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*/ |
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/* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */ |
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// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list, symbol_c *called_fb_declaration) |
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// void *forced_narrow_candidate_datatypes_c::visit(il_fb_call_c *symbol) |
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|
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/* | function_name '(' eol_list [il_param_list] ')' */ |
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/* NOTE: The parameter 'called_function_declaration' is used to pass data between the stage 3 and stage 4. */ |
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// SYM_REF2(il_formal_funct_call_c, function_name, il_param_list, symbol_c *called_function_declaration; int extensible_param_count;) |
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// void *forced_narrow_candidate_datatypes_c::visit(il_formal_funct_call_c *symbol) |
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|
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// void *visit(il_operand_list_c *symbol); |
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// void *forced_narrow_candidate_datatypes_c::visit(simple_instr_list_c *symbol) |
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|
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// SYM_REF1(il_simple_instruction_c, il_simple_instruction, symbol_c *prev_il_instruction;) |
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void *forced_narrow_candidate_datatypes_c::visit(il_simple_instruction_c*symbol) { |
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forced_narrow_il_instruction(symbol, symbol->next_il_instruction); |
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|
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/* return control to the visit() method of the base class! */ |
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return narrow_candidate_datatypes_c::visit(symbol); // This handle the situations (e) in the above example |
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} |
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|
677
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|
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/* |
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void *visit(il_param_list_c *symbol); |
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void *visit(il_param_assignment_c *symbol); |
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void *visit(il_param_out_assignment_c *symbol); |
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*/ |
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|
681
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|
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|
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/***************************************/ |
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/* B.3 - Language ST (Structured Text) */ |
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/***************************************/ |
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// SYM_LIST(statement_list_c) |
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/* The normal narrow_candidate_datatypes_c algorithm does not leave any symbol, in an ST code, with an undefined datatype. |
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* There is therefore no need to re-run the narrow algorithm here, so we overide the narrow_candidate_datatypes_c visitor, |
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* and simply bug out! |
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257 |
*/ |
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258 |
void *forced_narrow_candidate_datatypes_c::visit(statement_list_c *symbol) {return NULL;} |
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259 |