author | Edouard Tisserant <edouard.tisserant@gmail.com> |
Fri, 26 Apr 2024 09:27:21 +0200 | |
changeset 1105 | 8128cad6a6e3 |
parent 1054 | 57c08195c962 |
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) 2012 Mario de Sousa (msousa@fe.up.pt) |
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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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|
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/* |
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* Data type analysis of IL code may leave some IL instructions with an undefined datatype. |
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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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* defined datatype when we reach stage4. |
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* |
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* Example: |
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* ========= |
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* |
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* VAR |
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* N : INT := 99 ; |
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* tonv: TON; |
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* byte_var: BYTE; |
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* tonv : TON; |
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* a : BYTE; |
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* t : time; |
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* tod1: tod; |
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* END_VAR |
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* |
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* (0) --> Data type before executing forced_narrow_candidate_datatypes_c |
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* (1) --> Data type after executing 1st pass of forced_narrow_candidate_datatypes_c |
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* (2) --> Data type after executing 2nd pass of forced_narrow_candidate_datatypes_c |
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* |
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* --- --> NULL (undefined datatype) |
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* *** --> invalid_type_name_c (invalid datatype) |
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* |
681
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* (0) PASS1 (1) PASS2 (2) |
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* |
681
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* --- (e) *** *** CAL tonv ( |
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* PT := T#1s |
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* ) |
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* --- (e) *** *** JMP l4 |
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* |
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* --- (e) sint sint l0: LD 1 |
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* --- (e) sint sint ADD 2 |
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* --- (c) sint sint CAL tonv ( |
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* PT := T#1s |
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69 |
* ) |
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* |
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* --- (e) sint sint LD 45 |
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* --- (c) sint sint ADD 45 |
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73 |
* |
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74 |
* |
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75 |
* --- (e) sint sint LD 3 |
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* --- (e) sint sint l1: |
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* --- (c) sint sint l2: ADD 4 |
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* int int int LD 5 |
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* 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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* --- (d) --- (e) sint SUB 6 |
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* --- (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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* --- (e) bool bool NOT |
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* --- (b) bool bool RET |
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89 |
* |
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* int int int l3: |
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* int int int ST n |
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* --- (b) int int RET |
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93 |
* |
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94 |
* --- (e) *** *** l4: |
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* --- (e) *** *** CAL tonv ( |
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96 |
* PT := T#1s |
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* ) |
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* --- (a) *** *** JMP l0 |
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* --- (b) byte byte LD 88 |
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* |
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101 |
* |
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102 |
* |
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103 |
*/ |
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|
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|
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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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|
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changeset
|
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 |
|
1054
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Fix bug in datatype narrowing algorithm affecting IL code.
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|
123 |
void forced_narrow_candidate_datatypes_c::set_datatype_in_prev_il_instructions(symbol_c *datatype, il_instruction_c *symbol) { |
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|
124 |
if (NULL == symbol) ERROR; |
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|
125 |
/* In the forced_narrow_candidate_datatypes algorithm, we do NOT set any datatypes to invalid_type_name_c |
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|
126 |
* Any IL instructions that really are of an invalid_type_name_c (because the IL code is buggy?) have already |
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127 |
* been set by the standard narrow_candidate_datatypes algorithm. |
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128 |
* |
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|
129 |
* Remember too that valid IL code may also have some IL instructions correctly set to invalid_type_name_c, especially |
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|
130 |
* in cases where the data in the accumulator will not be used in the current IL instruction |
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|
131 |
* For example: |
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|
132 |
* LD bool_var |
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133 |
* JMPC label1 |
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|
134 |
* LD 34 |
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|
135 |
* ST int_var |
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|
136 |
* lable1: <---- This IL instruction_c (with NULL symbol->il_instruction) has invalid_type_name_c datatype!! |
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|
137 |
* LD T#3s And yet, the code is legal!!! |
57c08195c962
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|
138 |
* ST time_var |
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|
139 |
*/ |
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|
140 |
if (!get_datatype_info_c::is_type_valid(datatype)) return; |
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|
141 |
// Call the 'original' version of the set_datatype_in_prev_il_instructions() function, from narrow_candidate_datatypes_c |
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|
142 |
return narrow_candidate_datatypes_c::set_datatype_in_prev_il_instructions(datatype, symbol); |
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|
143 |
} |
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|
144 |
|
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Fix bug in datatype narrowing algorithm affecting IL code.
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parents:
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|
145 |
|
57c08195c962
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|
146 |
|
691
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parents:
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|
147 |
void forced_narrow_candidate_datatypes_c::forced_narrow_il_instruction(symbol_c *symbol, std::vector <symbol_c *> &next_il_instruction) { |
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|
148 |
if (NULL == symbol->datatype) { |
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parents:
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|
149 |
if (symbol->candidate_datatypes.empty()) { |
693
51a2fa6441b9
Prepare to delete search_constant_type_c -> Move the static variables from search_constant_type_c to get_datatype_info_c
Mario de Sousa <msousa@fe.up.pt>
parents:
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|
150 |
symbol->datatype = &(get_datatype_info_c::invalid_type_name); // This will occur in the situations (a) in the above example |
691
958454e9e40f
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parents:
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|
151 |
// 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)! |
958454e9e40f
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parents:
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|
152 |
} else { |
958454e9e40f
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parents:
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diff
changeset
|
153 |
if (next_il_instruction.empty()) { |
958454e9e40f
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parents:
688
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changeset
|
154 |
symbol->datatype = symbol->candidate_datatypes[0]; // This will occur in the situations (b) in the above example |
958454e9e40f
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parents:
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diff
changeset
|
155 |
} else { |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
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diff
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|
156 |
symbol_c *next_datatype = NULL; |
958454e9e40f
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parents:
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diff
changeset
|
157 |
|
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
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diff
changeset
|
158 |
/* 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. */ |
958454e9e40f
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parents:
688
diff
changeset
|
159 |
for (unsigned int i=0; i < next_il_instruction.size(); i++) |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
160 |
if (NULL != next_il_instruction[i]->datatype) |
958454e9e40f
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parents:
688
diff
changeset
|
161 |
next_datatype = next_il_instruction[i]->datatype; |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
688
diff
changeset
|
162 |
if (get_datatype_info_c::is_type_valid(next_datatype)) { |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
163 |
// This will occur in the situations (c) in the above example |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
164 |
symbol->datatype = symbol->candidate_datatypes[0]; |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
165 |
} else { |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
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diff
changeset
|
166 |
// This will occur in the situations (d) in the above example |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
688
diff
changeset
|
167 |
// 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! |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
168 |
} |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
169 |
} |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
688
diff
changeset
|
170 |
} |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
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parents:
688
diff
changeset
|
171 |
} |
958454e9e40f
Also force_narrow IL instructions inside IL expressions, i.e. inside parenthesis.
Mario de Sousa <msousa@fe.up.pt>
parents:
688
diff
changeset
|
172 |
} |
677
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
changeset
|
173 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
174 |
|
681
e837adad2437
Do not repeat narrow algorithm for ST code, and better comments.
Mario de Sousa <msousa@fe.up.pt>
parents:
679
diff
changeset
|
175 |
|
677
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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|
176 |
/****************************************/ |
740da3255d9d
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|
177 |
/* B.2 - Language IL (Instruction List) */ |
740da3255d9d
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|
178 |
/****************************************/ |
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|
179 |
/***********************************/ |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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|
180 |
/* B 2.1 Instructions and Operands */ |
740da3255d9d
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|
181 |
/***********************************/ |
740da3255d9d
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|
182 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
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changeset
|
183 |
/*| instruction_list il_instruction */ |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
changeset
|
184 |
// SYM_LIST(instruction_list_c) |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
changeset
|
185 |
void *forced_narrow_candidate_datatypes_c::visit(instruction_list_c *symbol) { |
740da3255d9d
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parents:
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changeset
|
186 |
for(int j = 0; j < 2; j++) { |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
187 |
for(int i = symbol->n-1; i >= 0; i--) { |
1041
56ebe2a31b5b
Access elements[] in list_c through a new get_element() method.
Mario de Sousa <msousa@fe.up.pt>
parents:
693
diff
changeset
|
188 |
symbol->get_element(i)->accept(*this); |
677
740da3255d9d
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|
189 |
} |
740da3255d9d
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|
190 |
} |
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Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
191 |
|
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
192 |
/* Assert that this algorithm managed to remove all NULL datatypes! */ |
684
0e417d42cf6a
Comment out invalid assertion.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
193 |
/* 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.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
194 |
* 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
Comment out invalid assertion.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
195 |
*/ |
0e417d42cf6a
Comment out invalid assertion.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
196 |
/* |
677
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
197 |
for(int i = symbol->n-1; i >= 0; i--) { |
1041
56ebe2a31b5b
Access elements[] in list_c through a new get_element() method.
Mario de Sousa <msousa@fe.up.pt>
parents:
693
diff
changeset
|
198 |
if (NULL == symbol->get_element(i)->datatype) |
677
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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|
199 |
ERROR; |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
200 |
} |
684
0e417d42cf6a
Comment out invalid assertion.
Mario de Sousa <msousa@fe.up.pt>
parents:
681
diff
changeset
|
201 |
*/ |
686
9b87606d4c07
Fix processing of TIME literals (submited by Andreas)
Mario de Sousa <msousa@fe.up.pt>
parents:
684
diff
changeset
|
202 |
|
677
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
changeset
|
203 |
return NULL; |
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
204 |
} |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
205 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
206 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
207 |
|
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
208 |
/* | label ':' [il_incomplete_instruction] eol_list */ |
740da3255d9d
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Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
209 |
// SYM_REF2(il_instruction_c, label, il_instruction) |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
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parents:
diff
changeset
|
210 |
// void *visit(instruction_list_c *symbol); |
740da3255d9d
Remove all remaining NULL (undefined) datatypes from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
211 |
void *forced_narrow_candidate_datatypes_c::visit(il_instruction_c *symbol) { |
691
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forced_narrow_il_instruction(symbol, symbol->next_il_instruction); |
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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 handles the situations (e) in the above example |
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} |
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/* | il_simple_operator [il_operand] */ |
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// SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) |
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// void *forced_narrow_candidate_datatypes_c::visit(il_simple_operation_c *symbol) |
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/* | function_name [il_operand_list] */ |
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/* NOTE: The parameters 'called_function_declaration' and 'extensible_param_count' are used to pass data between the stage 3 and stage 4. */ |
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// SYM_REF2(il_function_call_c, function_name, il_operand_list, symbol_c *called_function_declaration; int extensible_param_count;) |
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// void *forced_narrow_candidate_datatypes_c::visit(il_function_call_c *symbol) |
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/* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ |
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// SYM_REF3(il_expression_c, il_expr_operator, il_operand, simple_instr_list); |
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// void *forced_narrow_candidate_datatypes_c::visit(il_expression_c *symbol) |
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/* 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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/* | 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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// 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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// 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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|
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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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*/ |
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void *forced_narrow_candidate_datatypes_c::visit(statement_list_c *symbol) {return NULL;} |
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283 |