1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // WaitforNew.cpp -- Expand waitfor clauses into code. |
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8 | // |
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9 | // Author : Andrew Beach |
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10 | // Created On : Fri May 27 10:31:00 2022 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Tue Jun 13 13:30:00 2022 |
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13 | // Update Count : 0 |
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14 | // |
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15 | |
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16 | #include "Waituntil.hpp" |
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17 | |
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18 | #include <string> |
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19 | |
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20 | #include "AST/Copy.hpp" |
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21 | #include "AST/Expr.hpp" |
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22 | #include "AST/Pass.hpp" |
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23 | #include "AST/Print.hpp" |
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24 | #include "AST/Stmt.hpp" |
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25 | #include "AST/Type.hpp" |
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26 | #include "Common/UniqueName.hpp" |
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27 | |
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28 | using namespace ast; |
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29 | using namespace std; |
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30 | |
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31 | /* So this is what this pass dones: |
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32 | { |
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33 | when ( condA ) waituntil( A ){ doA(); } |
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34 | or when ( condB ) waituntil( B ){ doB(); } |
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35 | and when ( condC ) waituntil( C ) { doC(); } |
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36 | } |
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37 | || |
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38 | || |
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39 | \||/ |
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40 | \/ |
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41 | |
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42 | Generates these two routines: |
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43 | static inline bool is_full_sat_1( int * clause_statuses ) { |
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44 | return clause_statuses[0] |
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45 | || clause_statuses[1] |
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46 | && clause_statuses[2]; |
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47 | } |
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48 | |
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49 | static inline bool is_done_sat_1( int * clause_statuses ) { |
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50 | return has_run(clause_statuses[0]) |
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51 | || has_run(clause_statuses[1]) |
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52 | && has_run(clause_statuses[2]); |
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53 | } |
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54 | |
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55 | Replaces the waituntil statement above with the following code: |
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56 | { |
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57 | // used with atomic_dec/inc to get binary semaphore behaviour |
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58 | int park_counter = 0; |
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59 | |
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60 | // status (one for each clause) |
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61 | int clause_statuses[3] = { 0 }; |
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62 | |
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63 | bool whenA = condA; |
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64 | bool whenB = condB; |
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65 | bool whenC = condC; |
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66 | |
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67 | if ( !whenB ) clause_statuses[1] = __SELECT_RUN; |
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68 | if ( !whenC ) clause_statuses[2] = __SELECT_RUN; |
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69 | |
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70 | // some other conditional settors for clause_statuses are set here, see genSubtreeAssign and related routines |
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71 | |
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72 | // three blocks |
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73 | // for each block, create, setup, then register select_node |
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74 | select_node clause1; |
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75 | select_node clause2; |
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76 | select_node clause3; |
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77 | |
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78 | try { |
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79 | if ( whenA ) { register_select(A, clause1); setup_clause( clause1, &clause_statuses[0], &park_counter ); } |
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80 | ... repeat ^ for B and C ... |
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81 | |
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82 | // if else clause is defined a separate branch can occur here to set initial values, see genWhenStateConditions |
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83 | |
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84 | // loop & park until done |
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85 | while( !is_full_sat_1( clause_statuses ) ) { |
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86 | |
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87 | // binary sem P(); |
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88 | if ( __atomic_sub_fetch( &park_counter, 1, __ATOMIC_SEQ_CST) < 0 ) |
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89 | park(); |
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90 | |
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91 | // execute any blocks available with status set to 0 |
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92 | for ( int i = 0; i < 3; i++ ) { |
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93 | if (clause_statuses[i] == __SELECT_SAT) { |
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94 | switch (i) { |
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95 | case 0: |
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96 | try { |
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97 | on_selected( A, clause1 ); |
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98 | doA(); |
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99 | } |
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100 | finally { clause_statuses[i] = __SELECT_RUN; unregister_select(A, clause1); } |
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101 | break; |
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102 | case 1: |
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103 | ... same gen as A but for B and clause2 ... |
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104 | break; |
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105 | case 2: |
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106 | ... same gen as A but for C and clause3 ... |
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107 | break; |
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108 | } |
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109 | } |
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110 | } |
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111 | } |
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112 | |
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113 | // ensure that the blocks that triggered is_full_sat_1 are run |
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114 | // by running every un-run block that is SAT from the start until |
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115 | // the predicate is SAT when considering RUN status = true |
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116 | for ( int i = 0; i < 3; i++ ) { |
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117 | if (is_done_sat_1( clause_statuses )) break; |
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118 | if (clause_statuses[i] == __SELECT_SAT) |
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119 | ... Same if body here as in loop above ... |
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120 | } |
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121 | } finally { |
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122 | // the unregister and on_selected calls are needed to support primitives where the acquire has side effects |
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123 | // so the corresponding block MUST be run for those primitives to not lose state (example is channels) |
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124 | if ( !has_run(clause_statuses[0]) && whenA && unregister_select(A, clause1) ) |
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125 | on_selected( A, clause1 ) |
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126 | doA(); |
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127 | ... repeat if above for B and C ... |
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128 | } |
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129 | } |
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130 | |
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131 | */ |
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132 | |
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133 | namespace Concurrency { |
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134 | |
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135 | class GenerateWaitUntilCore final { |
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136 | vector<FunctionDecl *> & satFns; |
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137 | UniqueName namer_sat = "__is_full_sat_"s; |
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138 | UniqueName namer_run = "__is_run_sat_"s; |
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139 | UniqueName namer_park = "__park_counter_"s; |
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140 | UniqueName namer_status = "__clause_statuses_"s; |
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141 | UniqueName namer_node = "__clause_"s; |
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142 | UniqueName namer_target = "__clause_target_"s; |
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143 | UniqueName namer_when = "__when_cond_"s; |
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144 | UniqueName namer_label = "__waituntil_label_"s; |
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145 | |
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146 | string idxName = "__CFA_clause_idx_"; |
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147 | |
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148 | struct ClauseData { |
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149 | string nodeName; |
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150 | string targetName; |
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151 | string whenName; |
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152 | int index; |
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153 | string & statusName; |
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154 | ClauseData( int index, string & statusName ) : index(index), statusName(statusName) {} |
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155 | }; |
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156 | |
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157 | const StructDecl * selectNodeDecl = nullptr; |
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158 | |
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159 | // This first set of routines are all used to do the complicated job of |
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160 | // dealing with how to set predicate statuses with certain when_conds T/F |
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161 | // so that the when_cond == F effectively makes that clause "disappear" |
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162 | void updateAmbiguousWhen( WaitUntilStmt::ClauseNode * currNode, bool andAbove, bool orAbove, bool andBelow, bool orBelow ); |
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163 | void paintWhenTree( WaitUntilStmt::ClauseNode * currNode, bool andAbove, bool orAbove, bool & andBelow, bool & orBelow ); |
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164 | bool paintWhenTree( WaitUntilStmt::ClauseNode * currNode ); |
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165 | void collectWhens( WaitUntilStmt::ClauseNode * currNode, vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigIdxs, vector<int> & andIdxs, int & index, bool parentAmbig, bool parentAnd ); |
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166 | void collectWhens( WaitUntilStmt::ClauseNode * currNode, vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigIdxs, vector<int> & andIdxs ); |
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167 | void updateWhenState( WaitUntilStmt::ClauseNode * currNode ); |
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168 | void genSubtreeAssign( const WaitUntilStmt * stmt, WaitUntilStmt::ClauseNode * currNode, bool status, int & idx, CompoundStmt * retStmt, vector<ClauseData *> & clauseData ); |
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169 | void genStatusAssign( const WaitUntilStmt * stmt, WaitUntilStmt::ClauseNode * currNode, int & idx, CompoundStmt * retStmt, vector<ClauseData *> & clauseData ); |
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170 | CompoundStmt * getStatusAssignment( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData ); |
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171 | Stmt * genWhenStateConditions( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigClauses, vector<pair<int, WaitUntilStmt::ClauseNode *>>::size_type ambigIdx ); |
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172 | |
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173 | // These routines are just code-gen helpers |
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174 | void addPredicates( const WaitUntilStmt * stmt, string & satName, string & runName ); |
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175 | void setUpClause( const WhenClause * clause, ClauseData * data, string & pCountName, CompoundStmt * body ); |
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176 | CompoundStmt * genStatusCheckFor( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, string & predName ); |
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177 | Expr * genSelectTraitCall( const WhenClause * clause, const ClauseData * data, string fnName ); |
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178 | CompoundStmt * genStmtBlock( const WhenClause * clause, const ClauseData * data ); |
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179 | Stmt * genElseClauseBranch( const WaitUntilStmt * stmt, string & runName, string & arrName, vector<ClauseData *> & clauseData ); |
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180 | Stmt * genNoElseClauseBranch( const WaitUntilStmt * stmt, string & runName, string & arrName, string & pCountName, vector<ClauseData *> & clauseData ); |
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181 | void genClauseInits( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, CompoundStmt * body, string & statusName, string & elseWhenName ); |
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182 | Stmt * recursiveOrIfGen( const WaitUntilStmt * stmt, vector<ClauseData *> & data, vector<ClauseData*>::size_type idx, string & elseWhenName ); |
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183 | Stmt * buildOrCaseSwitch( const WaitUntilStmt * stmt, string & statusName, vector<ClauseData *> & data ); |
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184 | Stmt * genAllOr( const WaitUntilStmt * stmt ); |
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185 | |
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186 | public: |
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187 | void previsit( const StructDecl * decl ); |
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188 | Stmt * postvisit( const WaitUntilStmt * stmt ); |
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189 | GenerateWaitUntilCore( vector<FunctionDecl *> & satFns ): satFns(satFns) {} |
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190 | }; |
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191 | |
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192 | // Finds select_node decl |
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193 | void GenerateWaitUntilCore::previsit( const StructDecl * decl ) { |
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194 | if ( !decl->body ) { |
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195 | return; |
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196 | } else if ( "select_node" == decl->name ) { |
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197 | assert( !selectNodeDecl ); |
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198 | selectNodeDecl = decl; |
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199 | } |
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200 | } |
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201 | |
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202 | void GenerateWaitUntilCore::updateAmbiguousWhen( WaitUntilStmt::ClauseNode * currNode, bool andAbove, bool orAbove, bool andBelow, bool orBelow ) { |
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203 | // all children when-ambiguous |
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204 | if ( currNode->left->ambiguousWhen && currNode->right->ambiguousWhen ) |
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205 | // true iff an ancestor/descendant has a different operation |
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206 | currNode->ambiguousWhen = (orAbove || orBelow) && (andBelow || andAbove); |
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207 | // ambiguousWhen is initially false so theres no need to set it here |
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208 | } |
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209 | |
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210 | // Traverses ClauseNode tree and paints each AND/OR node as when-ambiguous true or false |
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211 | // This tree painting is needed to generate the if statements that set the initial state |
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212 | // of the clause statuses when some clauses are turned off via when_cond |
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213 | // An internal AND/OR node is when-ambiguous if it satisfies all of the following: |
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214 | // - It has an ancestor or descendant that is a different operation, i.e. (AND has an OR ancestor or vice versa) |
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215 | // - All of its descendent clauses are optional, i.e. they have a when_cond defined on the WhenClause |
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216 | void GenerateWaitUntilCore::paintWhenTree( WaitUntilStmt::ClauseNode * currNode, bool andAbove, bool orAbove, bool & andBelow, bool & orBelow ) { |
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217 | bool aBelow = false; // updated by child nodes |
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218 | bool oBelow = false; // updated by child nodes |
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219 | switch (currNode->op) { |
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220 | case WaitUntilStmt::ClauseNode::AND: |
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221 | paintWhenTree( currNode->left, true, orAbove, aBelow, oBelow ); |
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222 | paintWhenTree( currNode->right, true, orAbove, aBelow, oBelow ); |
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223 | |
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224 | // update currNode's when flag based on conditions listed in fn signature comment above |
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225 | updateAmbiguousWhen(currNode, true, orAbove, aBelow, oBelow ); |
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226 | |
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227 | // set return flags to tell parents which decendant ops have been seen |
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228 | andBelow = true; |
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229 | orBelow = oBelow; |
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230 | return; |
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231 | case WaitUntilStmt::ClauseNode::OR: |
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232 | paintWhenTree( currNode->left, andAbove, true, aBelow, oBelow ); |
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233 | paintWhenTree( currNode->right, andAbove, true, aBelow, oBelow ); |
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234 | |
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235 | // update currNode's when flag based on conditions listed in fn signature comment above |
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236 | updateAmbiguousWhen(currNode, andAbove, true, aBelow, oBelow ); |
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237 | |
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238 | // set return flags to tell parents which decendant ops have been seen |
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239 | andBelow = aBelow; |
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240 | orBelow = true; |
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241 | return; |
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242 | case WaitUntilStmt::ClauseNode::LEAF: |
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243 | if ( currNode->leaf->when_cond ) |
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244 | currNode->ambiguousWhen = true; |
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245 | return; |
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246 | default: |
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247 | assertf(false, "Unreachable waituntil clause node type. How did you get here???"); |
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248 | } |
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249 | } |
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250 | |
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251 | // overloaded wrapper for paintWhenTree that sets initial values |
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252 | // returns true if entire tree is OR's (special case) |
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253 | bool GenerateWaitUntilCore::paintWhenTree( WaitUntilStmt::ClauseNode * currNode ) { |
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254 | bool aBelow = false, oBelow = false; // unused by initial call |
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255 | paintWhenTree( currNode, false, false, aBelow, oBelow ); |
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256 | return !aBelow; |
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257 | } |
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258 | |
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259 | // Helper: returns Expr that represents arrName[index] |
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260 | Expr * genArrAccessExpr( const CodeLocation & loc, int index, string arrName ) { |
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261 | return new UntypedExpr ( loc, |
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262 | new NameExpr( loc, "?[?]" ), |
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263 | { |
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264 | new NameExpr( loc, arrName ), |
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265 | ConstantExpr::from_int( loc, index ) |
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266 | } |
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267 | ); |
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268 | } |
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269 | |
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270 | // After the ClauseNode AND/OR nodes are painted this routine is called to traverses the tree and does the following: |
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271 | // - collects a set of indices in the clause arr that refer whenclauses that can have ambiguous status assignments (ambigIdxs) |
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272 | // - collects a set of indices in the clause arr that refer whenclauses that have a when() defined and an AND node as a parent (andIdxs) |
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273 | // - updates LEAF nodes to be when-ambiguous if their direct parent is when-ambiguous. |
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274 | void GenerateWaitUntilCore::collectWhens( WaitUntilStmt::ClauseNode * currNode, vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigIdxs, vector<int> & andIdxs, int & index, bool parentAmbig, bool parentAnd ) { |
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275 | switch (currNode->op) { |
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276 | case WaitUntilStmt::ClauseNode::AND: |
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277 | collectWhens( currNode->left, ambigIdxs, andIdxs, index, currNode->ambiguousWhen, true ); |
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278 | collectWhens( currNode->right, ambigIdxs, andIdxs, index, currNode->ambiguousWhen, true ); |
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279 | return; |
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280 | case WaitUntilStmt::ClauseNode::OR: |
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281 | collectWhens( currNode->left, ambigIdxs, andIdxs, index, currNode->ambiguousWhen, false ); |
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282 | collectWhens( currNode->right, ambigIdxs, andIdxs, index, currNode->ambiguousWhen, false ); |
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283 | return; |
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284 | case WaitUntilStmt::ClauseNode::LEAF: |
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285 | if ( parentAmbig ) { |
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286 | ambigIdxs.push_back(make_pair(index, currNode)); |
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287 | } |
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288 | if ( parentAnd && currNode->leaf->when_cond ) { |
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289 | currNode->childOfAnd = true; |
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290 | andIdxs.push_back(index); |
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291 | } |
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292 | index++; |
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293 | return; |
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294 | default: |
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295 | assertf(false, "Unreachable waituntil clause node type. How did you get here???"); |
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296 | } |
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297 | } |
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298 | |
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299 | // overloaded wrapper for collectWhens that sets initial values |
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300 | void GenerateWaitUntilCore::collectWhens( WaitUntilStmt::ClauseNode * currNode, vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigIdxs, vector<int> & andIdxs ) { |
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301 | int idx = 0; |
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302 | collectWhens( currNode, ambigIdxs, andIdxs, idx, false, false ); |
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303 | } |
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304 | |
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305 | // recursively updates ClauseNode whenState on internal nodes so that next pass can see which |
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306 | // subtrees are "turned off" |
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307 | // sets whenState = false iff both children have whenState == false. |
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308 | // similar to paintWhenTree except since paintWhenTree also filtered out clauses we don't need to consider based on op |
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309 | // since the ambiguous clauses were filtered in paintWhenTree we don't need to worry about that here |
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310 | void GenerateWaitUntilCore::updateWhenState( WaitUntilStmt::ClauseNode * currNode ) { |
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311 | if ( currNode->op == WaitUntilStmt::ClauseNode::LEAF ) return; |
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312 | updateWhenState( currNode->left ); |
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313 | updateWhenState( currNode->right ); |
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314 | if ( !currNode->left->whenState && !currNode->right->whenState ) |
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315 | currNode->whenState = false; |
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316 | else |
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317 | currNode->whenState = true; |
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318 | } |
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319 | |
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320 | // generates the minimal set of status assignments to ensure predicate subtree passed as currNode evaluates to status |
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321 | // assumes that this will only be called on subtrees that are entirely whenState == false |
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322 | void GenerateWaitUntilCore::genSubtreeAssign( const WaitUntilStmt * stmt, WaitUntilStmt::ClauseNode * currNode, bool status, int & idx, CompoundStmt * retStmt, vector<ClauseData *> & clauseData ) { |
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323 | if ( ( currNode->op == WaitUntilStmt::ClauseNode::AND && status ) |
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324 | || ( currNode->op == WaitUntilStmt::ClauseNode::OR && !status ) ) { |
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325 | // need to recurse on both subtrees if && subtree needs to be true or || subtree needs to be false |
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326 | genSubtreeAssign( stmt, currNode->left, status, idx, retStmt, clauseData ); |
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327 | genSubtreeAssign( stmt, currNode->right, status, idx, retStmt, clauseData ); |
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328 | } else if ( ( currNode->op == WaitUntilStmt::ClauseNode::OR && status ) |
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329 | || ( currNode->op == WaitUntilStmt::ClauseNode::AND && !status ) ) { |
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330 | // only one subtree needs to evaluate to status if && subtree needs to be true or || subtree needs to be false |
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331 | CompoundStmt * leftStmt = new CompoundStmt( stmt->location ); |
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332 | CompoundStmt * rightStmt = new CompoundStmt( stmt->location ); |
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333 | |
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334 | // only one side needs to evaluate to status so we recurse on both subtrees |
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335 | // but only keep the statements from the subtree with minimal statements |
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336 | genSubtreeAssign( stmt, currNode->left, status, idx, leftStmt, clauseData ); |
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337 | genSubtreeAssign( stmt, currNode->right, status, idx, rightStmt, clauseData ); |
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338 | |
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339 | // append minimal statements to retStmt |
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340 | if ( leftStmt->kids.size() < rightStmt->kids.size() ) { |
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341 | retStmt->kids.splice( retStmt->kids.end(), leftStmt->kids ); |
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342 | } else { |
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343 | retStmt->kids.splice( retStmt->kids.end(), rightStmt->kids ); |
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344 | } |
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345 | |
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346 | delete leftStmt; |
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347 | delete rightStmt; |
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348 | } else if ( currNode->op == WaitUntilStmt::ClauseNode::LEAF ) { |
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349 | const CodeLocation & loc = stmt->location; |
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350 | if ( status && !currNode->childOfAnd ) { |
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351 | retStmt->push_back( |
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352 | new ExprStmt( loc, |
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353 | UntypedExpr::createAssign( loc, |
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354 | genArrAccessExpr( loc, idx, clauseData.at(idx)->statusName ), |
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355 | new NameExpr( loc, "__SELECT_RUN" ) |
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356 | ) |
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357 | ) |
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358 | ); |
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359 | } else if ( !status && currNode->childOfAnd ) { |
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360 | retStmt->push_back( |
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361 | new ExprStmt( loc, |
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362 | UntypedExpr::createAssign( loc, |
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363 | genArrAccessExpr( loc, idx, clauseData.at(idx)->statusName ), |
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364 | new NameExpr( loc, "__SELECT_UNSAT" ) |
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365 | ) |
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366 | ) |
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367 | ); |
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368 | } |
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369 | |
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370 | // No need to generate statements for the following cases since childOfAnd are always set to true |
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371 | // and !childOfAnd are always false |
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372 | // - status && currNode->childOfAnd |
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373 | // - !status && !currNode->childOfAnd |
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374 | idx++; |
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375 | } |
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376 | } |
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377 | |
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378 | void GenerateWaitUntilCore::genStatusAssign( const WaitUntilStmt * stmt, WaitUntilStmt::ClauseNode * currNode, int & idx, CompoundStmt * retStmt, vector<ClauseData *> & clauseData ) { |
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379 | switch (currNode->op) { |
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380 | case WaitUntilStmt::ClauseNode::AND: |
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381 | // check which subtrees have all whenState == false (disabled) |
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382 | if (!currNode->left->whenState && !currNode->right->whenState) { |
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383 | // this case can only occur when whole tree is disabled since otherwise |
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384 | // genStatusAssign( ... ) isn't called on nodes with whenState == false |
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385 | assert( !currNode->whenState ); // paranoidWWW |
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386 | // whole tree disabled so pass true so that select is SAT vacuously |
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387 | genSubtreeAssign( stmt, currNode, true, idx, retStmt, clauseData ); |
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388 | } else if ( !currNode->left->whenState ) { |
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389 | // pass true since x && true === x |
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390 | genSubtreeAssign( stmt, currNode->left, true, idx, retStmt, clauseData ); |
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391 | genStatusAssign( stmt, currNode->right, idx, retStmt, clauseData ); |
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392 | } else if ( !currNode->right->whenState ) { |
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393 | genStatusAssign( stmt, currNode->left, idx, retStmt, clauseData ); |
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394 | genSubtreeAssign( stmt, currNode->right, true, idx, retStmt, clauseData ); |
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395 | } else { |
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396 | // if no children with whenState == false recurse normally via break |
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397 | break; |
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398 | } |
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399 | return; |
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400 | case WaitUntilStmt::ClauseNode::OR: |
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401 | if (!currNode->left->whenState && !currNode->right->whenState) { |
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402 | assert( !currNode->whenState ); // paranoid |
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403 | genSubtreeAssign( stmt, currNode, true, idx, retStmt, clauseData ); |
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404 | } else if ( !currNode->left->whenState ) { |
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405 | // pass false since x || false === x |
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406 | genSubtreeAssign( stmt, currNode->left, false, idx, retStmt, clauseData ); |
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407 | genStatusAssign( stmt, currNode->right, idx, retStmt, clauseData ); |
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408 | } else if ( !currNode->right->whenState ) { |
---|
409 | genStatusAssign( stmt, currNode->left, idx, retStmt, clauseData ); |
---|
410 | genSubtreeAssign( stmt, currNode->right, false, idx, retStmt, clauseData ); |
---|
411 | } else { |
---|
412 | break; |
---|
413 | } |
---|
414 | return; |
---|
415 | case WaitUntilStmt::ClauseNode::LEAF: |
---|
416 | idx++; |
---|
417 | return; |
---|
418 | default: |
---|
419 | assertf(false, "Unreachable waituntil clause node type. How did you get here???"); |
---|
420 | } |
---|
421 | genStatusAssign( stmt, currNode->left, idx, retStmt, clauseData ); |
---|
422 | genStatusAssign( stmt, currNode->right, idx, retStmt, clauseData ); |
---|
423 | } |
---|
424 | |
---|
425 | // generates a minimal set of assignments for status arr based on which whens are toggled on/off |
---|
426 | CompoundStmt * GenerateWaitUntilCore::getStatusAssignment( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData ) { |
---|
427 | updateWhenState( stmt->predicateTree ); |
---|
428 | CompoundStmt * retval = new CompoundStmt( stmt->location ); |
---|
429 | int idx = 0; |
---|
430 | genStatusAssign( stmt, stmt->predicateTree, idx, retval, clauseData ); |
---|
431 | return retval; |
---|
432 | } |
---|
433 | |
---|
434 | // generates nested if/elses for all possible assignments of ambiguous when_conds |
---|
435 | // exponential size of code gen but linear runtime O(n), where n is number of ambiguous whens() |
---|
436 | Stmt * GenerateWaitUntilCore::genWhenStateConditions( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, |
---|
437 | vector<pair<int, WaitUntilStmt::ClauseNode *>> & ambigClauses, vector<pair<int, WaitUntilStmt::ClauseNode *>>::size_type ambigIdx ) { |
---|
438 | // I hate C++ sometimes, using vector<pair<int, WaitUntilStmt::ClauseNode *>>::size_type for size() comparison seems silly. |
---|
439 | // Why is size_type parameterized on the type stored in the vector????? |
---|
440 | |
---|
441 | const CodeLocation & loc = stmt->location; |
---|
442 | int clauseIdx = ambigClauses.at(ambigIdx).first; |
---|
443 | WaitUntilStmt::ClauseNode * currNode = ambigClauses.at(ambigIdx).second; |
---|
444 | Stmt * thenStmt; |
---|
445 | Stmt * elseStmt; |
---|
446 | |
---|
447 | if ( ambigIdx == ambigClauses.size() - 1 ) { // base case |
---|
448 | currNode->whenState = true; |
---|
449 | thenStmt = getStatusAssignment( stmt, clauseData ); |
---|
450 | currNode->whenState = false; |
---|
451 | elseStmt = getStatusAssignment( stmt, clauseData ); |
---|
452 | } else { |
---|
453 | // recurse both with when enabled and disabled to generate all possible cases |
---|
454 | currNode->whenState = true; |
---|
455 | thenStmt = genWhenStateConditions( stmt, clauseData, ambigClauses, ambigIdx + 1 ); |
---|
456 | currNode->whenState = false; |
---|
457 | elseStmt = genWhenStateConditions( stmt, clauseData, ambigClauses, ambigIdx + 1 ); |
---|
458 | } |
---|
459 | |
---|
460 | // insert first recursion result in if ( __when_cond_ ) { ... } |
---|
461 | // insert second recursion result in else { ... } |
---|
462 | return new CompoundStmt ( loc, |
---|
463 | { |
---|
464 | new IfStmt( loc, |
---|
465 | new NameExpr( loc, clauseData.at(clauseIdx)->whenName ), |
---|
466 | thenStmt, |
---|
467 | elseStmt |
---|
468 | ) |
---|
469 | } |
---|
470 | ); |
---|
471 | } |
---|
472 | |
---|
473 | // typedef a fn ptr so that we can reuse genPredExpr |
---|
474 | // genLeafExpr is used to refer to one of the following two routines |
---|
475 | typedef Expr * (*GenLeafExpr)( const CodeLocation & loc, int & index ); |
---|
476 | |
---|
477 | // return Expr that represents clause_statuses[index] |
---|
478 | // mutates index to be index + 1 |
---|
479 | Expr * genSatExpr( const CodeLocation & loc, int & index ) { |
---|
480 | return genArrAccessExpr( loc, index++, "clause_statuses" ); |
---|
481 | } |
---|
482 | |
---|
483 | // return Expr that represents has_run(clause_statuses[index]) |
---|
484 | Expr * genRunExpr( const CodeLocation & loc, int & index ) { |
---|
485 | return new UntypedExpr ( loc, |
---|
486 | new NameExpr( loc, "__CFA_has_clause_run" ), |
---|
487 | { genSatExpr( loc, index ) } |
---|
488 | ); |
---|
489 | } |
---|
490 | |
---|
491 | // Takes in the ClauseNode tree and recursively generates |
---|
492 | // the predicate expr used inside the predicate functions |
---|
493 | Expr * genPredExpr( const CodeLocation & loc, WaitUntilStmt::ClauseNode * currNode, int & idx, GenLeafExpr genLeaf ) { |
---|
494 | Expr * leftExpr, * rightExpr; |
---|
495 | switch (currNode->op) { |
---|
496 | case WaitUntilStmt::ClauseNode::AND: |
---|
497 | leftExpr = genPredExpr( loc, currNode->left, idx, genLeaf ); |
---|
498 | rightExpr = genPredExpr( loc, currNode->right, idx, genLeaf ); |
---|
499 | return new LogicalExpr( loc, |
---|
500 | new CastExpr( loc, leftExpr, new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast ), |
---|
501 | new CastExpr( loc, rightExpr, new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast ), |
---|
502 | LogicalFlag::AndExpr |
---|
503 | ); |
---|
504 | break; |
---|
505 | case WaitUntilStmt::ClauseNode::OR: |
---|
506 | leftExpr = genPredExpr( loc, currNode->left, idx, genLeaf ); |
---|
507 | rightExpr = genPredExpr( loc, currNode->right, idx, genLeaf ); |
---|
508 | return new LogicalExpr( loc, |
---|
509 | new CastExpr( loc, leftExpr, new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast ), |
---|
510 | new CastExpr( loc, rightExpr, new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast ), |
---|
511 | LogicalFlag::OrExpr ); |
---|
512 | break; |
---|
513 | case WaitUntilStmt::ClauseNode::LEAF: |
---|
514 | return genLeaf( loc, idx ); |
---|
515 | break; |
---|
516 | default: |
---|
517 | assertf(false, "Unreachable waituntil clause node type. How did you get here???");\ |
---|
518 | return nullptr; |
---|
519 | break; |
---|
520 | } |
---|
521 | return nullptr; |
---|
522 | } |
---|
523 | |
---|
524 | |
---|
525 | // Builds the predicate functions used to check the status of the waituntil statement |
---|
526 | /* Ex: |
---|
527 | { |
---|
528 | waituntil( A ){ doA(); } |
---|
529 | or waituntil( B ){ doB(); } |
---|
530 | and waituntil( C ) { doC(); } |
---|
531 | } |
---|
532 | generates => |
---|
533 | static inline bool is_full_sat_1( int * clause_statuses ) { |
---|
534 | return clause_statuses[0] |
---|
535 | || clause_statuses[1] |
---|
536 | && clause_statuses[2]; |
---|
537 | } |
---|
538 | |
---|
539 | static inline bool is_done_sat_1( int * clause_statuses ) { |
---|
540 | return has_run(clause_statuses[0]) |
---|
541 | || has_run(clause_statuses[1]) |
---|
542 | && has_run(clause_statuses[2]); |
---|
543 | } |
---|
544 | */ |
---|
545 | // Returns a predicate function decl |
---|
546 | // predName and genLeaf determine if this generates an is_done or an is_full predicate |
---|
547 | FunctionDecl * buildPredicate( const WaitUntilStmt * stmt, GenLeafExpr genLeaf, string & predName ) { |
---|
548 | int arrIdx = 0; |
---|
549 | const CodeLocation & loc = stmt->location; |
---|
550 | CompoundStmt * body = new CompoundStmt( loc ); |
---|
551 | body->push_back( new ReturnStmt( loc, genPredExpr( loc, stmt->predicateTree, arrIdx, genLeaf ) ) ); |
---|
552 | |
---|
553 | return new FunctionDecl( loc, |
---|
554 | predName, |
---|
555 | { |
---|
556 | new ObjectDecl( loc, |
---|
557 | "clause_statuses", |
---|
558 | new PointerType( new BasicType( BasicKind::LongUnsignedInt ) ) |
---|
559 | ) |
---|
560 | }, |
---|
561 | { |
---|
562 | new ObjectDecl( loc, |
---|
563 | "sat_ret", |
---|
564 | new BasicType( BasicKind::Bool ) |
---|
565 | ) |
---|
566 | }, |
---|
567 | body, // body |
---|
568 | { Storage::Static }, // storage |
---|
569 | Linkage::Cforall, // linkage |
---|
570 | {}, // attributes |
---|
571 | { Function::Inline } |
---|
572 | ); |
---|
573 | } |
---|
574 | |
---|
575 | // Creates is_done and is_full predicates |
---|
576 | void GenerateWaitUntilCore::addPredicates( const WaitUntilStmt * stmt, string & satName, string & runName ) { |
---|
577 | if ( !stmt->else_stmt || stmt->else_cond ) // don't need SAT predicate when else variation with no else_cond |
---|
578 | satFns.push_back( Concurrency::buildPredicate( stmt, genSatExpr, satName ) ); |
---|
579 | satFns.push_back( Concurrency::buildPredicate( stmt, genRunExpr, runName ) ); |
---|
580 | } |
---|
581 | |
---|
582 | // Adds the following to body: |
---|
583 | // if ( when_cond ) { // this if is omitted if no when() condition |
---|
584 | // setup_clause( clause1, &clause_statuses[0], &park_counter ); |
---|
585 | // register_select(A, clause1); |
---|
586 | // } |
---|
587 | void GenerateWaitUntilCore::setUpClause( const WhenClause * clause, ClauseData * data, string & pCountName, CompoundStmt * body ) { |
---|
588 | CompoundStmt * currBody = body; |
---|
589 | const CodeLocation & loc = clause->location; |
---|
590 | |
---|
591 | // If we have a when_cond make the initialization conditional |
---|
592 | if ( clause->when_cond ) |
---|
593 | currBody = new CompoundStmt( loc ); |
---|
594 | |
---|
595 | // Generates: setup_clause( clause1, &clause_statuses[0], &park_counter ); |
---|
596 | currBody->push_back( new ExprStmt( loc, |
---|
597 | new UntypedExpr ( loc, |
---|
598 | new NameExpr( loc, "setup_clause" ), |
---|
599 | { |
---|
600 | new NameExpr( loc, data->nodeName ), |
---|
601 | new AddressExpr( loc, genArrAccessExpr( loc, data->index, data->statusName ) ), |
---|
602 | new AddressExpr( loc, new NameExpr( loc, pCountName ) ) |
---|
603 | } |
---|
604 | ) |
---|
605 | )); |
---|
606 | |
---|
607 | // Generates: register_select(A, clause1); |
---|
608 | currBody->push_back( new ExprStmt( loc, genSelectTraitCall( clause, data, "register_select" ) ) ); |
---|
609 | |
---|
610 | // generates: if ( when_cond ) { ... currBody ... } |
---|
611 | if ( clause->when_cond ) |
---|
612 | body->push_back( |
---|
613 | new IfStmt( loc, |
---|
614 | new NameExpr( loc, data->whenName ), |
---|
615 | currBody |
---|
616 | ) |
---|
617 | ); |
---|
618 | } |
---|
619 | |
---|
620 | // Used to generate a call to one of the select trait routines |
---|
621 | Expr * GenerateWaitUntilCore::genSelectTraitCall( const WhenClause * clause, const ClauseData * data, string fnName ) { |
---|
622 | const CodeLocation & loc = clause->location; |
---|
623 | return new UntypedExpr ( loc, |
---|
624 | new NameExpr( loc, fnName ), |
---|
625 | { |
---|
626 | new NameExpr( loc, data->targetName ), |
---|
627 | new NameExpr( loc, data->nodeName ) |
---|
628 | } |
---|
629 | ); |
---|
630 | } |
---|
631 | |
---|
632 | // Generates: |
---|
633 | /* on_selected( target_1, node_1 ); ... corresponding body of target_1 ... |
---|
634 | */ |
---|
635 | CompoundStmt * GenerateWaitUntilCore::genStmtBlock( const WhenClause * clause, const ClauseData * data ) { |
---|
636 | const CodeLocation & cLoc = clause->location; |
---|
637 | return new CompoundStmt( cLoc, |
---|
638 | { |
---|
639 | new IfStmt( cLoc, |
---|
640 | genSelectTraitCall( clause, data, "on_selected" ), |
---|
641 | ast::deepCopy( clause->stmt ) |
---|
642 | ) |
---|
643 | } |
---|
644 | ); |
---|
645 | } |
---|
646 | |
---|
647 | // this routine generates and returns the following |
---|
648 | /*for ( int i = 0; i < numClauses; i++ ) { |
---|
649 | if ( predName(clause_statuses) ) break; |
---|
650 | if (clause_statuses[i] == __SELECT_SAT) { |
---|
651 | switch (i) { |
---|
652 | case 0: |
---|
653 | try { |
---|
654 | on_selected( target1, clause1 ); |
---|
655 | dotarget1stmt(); |
---|
656 | } |
---|
657 | finally { clause_statuses[i] = __SELECT_RUN; unregister_select(target1, clause1); } |
---|
658 | break; |
---|
659 | ... |
---|
660 | case N: |
---|
661 | ... |
---|
662 | break; |
---|
663 | } |
---|
664 | } |
---|
665 | }*/ |
---|
666 | CompoundStmt * GenerateWaitUntilCore::genStatusCheckFor( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, string & predName ) { |
---|
667 | CompoundStmt * ifBody = new CompoundStmt( stmt->location ); |
---|
668 | const CodeLocation & loc = stmt->location; |
---|
669 | |
---|
670 | string switchLabel = namer_label.newName(); |
---|
671 | |
---|
672 | /* generates: |
---|
673 | switch (i) { |
---|
674 | case 0: |
---|
675 | try { |
---|
676 | on_selected( target1, clause1 ); |
---|
677 | dotarget1stmt(); |
---|
678 | } |
---|
679 | finally { clause_statuses[i] = __SELECT_RUN; unregister_select(target1, clause1); } |
---|
680 | break; |
---|
681 | ... |
---|
682 | case N: |
---|
683 | ... |
---|
684 | break; |
---|
685 | }*/ |
---|
686 | std::vector<ptr<CaseClause>> switchCases; |
---|
687 | int idx = 0; |
---|
688 | for ( const auto & clause: stmt->clauses ) { |
---|
689 | const CodeLocation & cLoc = clause->location; |
---|
690 | switchCases.push_back( |
---|
691 | new CaseClause( cLoc, |
---|
692 | ConstantExpr::from_int( cLoc, idx ), |
---|
693 | { |
---|
694 | new CompoundStmt( cLoc, |
---|
695 | { |
---|
696 | new ast::TryStmt( cLoc, |
---|
697 | genStmtBlock( clause, clauseData.at(idx) ), |
---|
698 | {}, |
---|
699 | new ast::FinallyClause( cLoc, |
---|
700 | new CompoundStmt( cLoc, |
---|
701 | { |
---|
702 | new ExprStmt( loc, |
---|
703 | new UntypedExpr ( loc, |
---|
704 | new NameExpr( loc, "?=?" ), |
---|
705 | { |
---|
706 | new UntypedExpr ( loc, |
---|
707 | new NameExpr( loc, "?[?]" ), |
---|
708 | { |
---|
709 | new NameExpr( loc, clauseData.at(0)->statusName ), |
---|
710 | new NameExpr( loc, idxName ) |
---|
711 | } |
---|
712 | ), |
---|
713 | new NameExpr( loc, "__SELECT_RUN" ) |
---|
714 | } |
---|
715 | ) |
---|
716 | ), |
---|
717 | new ExprStmt( loc, genSelectTraitCall( clause, clauseData.at(idx), "unregister_select" ) ) |
---|
718 | } |
---|
719 | ) |
---|
720 | ) |
---|
721 | ), |
---|
722 | new BranchStmt( cLoc, BranchStmt::Kind::Break, Label( cLoc, switchLabel ) ) |
---|
723 | } |
---|
724 | ) |
---|
725 | } |
---|
726 | ) |
---|
727 | ); |
---|
728 | idx++; |
---|
729 | } |
---|
730 | |
---|
731 | ifBody->push_back( |
---|
732 | new SwitchStmt( loc, |
---|
733 | new NameExpr( loc, idxName ), |
---|
734 | std::move( switchCases ), |
---|
735 | { Label( loc, switchLabel ) } |
---|
736 | ) |
---|
737 | ); |
---|
738 | |
---|
739 | // gens: |
---|
740 | // if (clause_statuses[i] == __SELECT_SAT) { |
---|
741 | // ... ifBody ... |
---|
742 | // } |
---|
743 | IfStmt * ifSwitch = new IfStmt( loc, |
---|
744 | new UntypedExpr ( loc, |
---|
745 | new NameExpr( loc, "?==?" ), |
---|
746 | { |
---|
747 | new UntypedExpr ( loc, |
---|
748 | new NameExpr( loc, "?[?]" ), |
---|
749 | { |
---|
750 | new NameExpr( loc, clauseData.at(0)->statusName ), |
---|
751 | new NameExpr( loc, idxName ) |
---|
752 | } |
---|
753 | ), |
---|
754 | new NameExpr( loc, "__SELECT_SAT" ) |
---|
755 | } |
---|
756 | ), // condition |
---|
757 | ifBody // body |
---|
758 | ); |
---|
759 | |
---|
760 | string forLabel = namer_label.newName(); |
---|
761 | |
---|
762 | // we hoist init here so that this pass can happen after hoistdecls pass |
---|
763 | return new CompoundStmt( loc, |
---|
764 | { |
---|
765 | new DeclStmt( loc, |
---|
766 | new ObjectDecl( loc, |
---|
767 | idxName, |
---|
768 | new BasicType( BasicKind::SignedInt ), |
---|
769 | new SingleInit( loc, ConstantExpr::from_int( loc, 0 ) ) |
---|
770 | ) |
---|
771 | ), |
---|
772 | new ForStmt( loc, |
---|
773 | {}, // inits |
---|
774 | new UntypedExpr ( loc, |
---|
775 | new NameExpr( loc, "?<?" ), |
---|
776 | { |
---|
777 | new NameExpr( loc, idxName ), |
---|
778 | ConstantExpr::from_int( loc, stmt->clauses.size() ) |
---|
779 | } |
---|
780 | ), // cond |
---|
781 | new UntypedExpr ( loc, |
---|
782 | new NameExpr( loc, "?++" ), |
---|
783 | { new NameExpr( loc, idxName ) } |
---|
784 | ), // inc |
---|
785 | new CompoundStmt( loc, |
---|
786 | { |
---|
787 | new IfStmt( loc, |
---|
788 | new UntypedExpr ( loc, |
---|
789 | new NameExpr( loc, predName ), |
---|
790 | { new NameExpr( loc, clauseData.at(0)->statusName ) } |
---|
791 | ), |
---|
792 | new BranchStmt( loc, BranchStmt::Kind::Break, Label( loc, forLabel ) ) |
---|
793 | ), |
---|
794 | ifSwitch |
---|
795 | } |
---|
796 | ), // body |
---|
797 | { Label( loc, forLabel ) } |
---|
798 | ) |
---|
799 | } |
---|
800 | ); |
---|
801 | } |
---|
802 | |
---|
803 | // Generates: !is_full_sat_n() / !is_run_sat_n() |
---|
804 | Expr * genNotSatExpr( const WaitUntilStmt * stmt, string & satName, string & arrName ) { |
---|
805 | const CodeLocation & loc = stmt->location; |
---|
806 | return new UntypedExpr ( loc, |
---|
807 | new NameExpr( loc, "!?" ), |
---|
808 | { |
---|
809 | new UntypedExpr ( loc, |
---|
810 | new NameExpr( loc, satName ), |
---|
811 | { new NameExpr( loc, arrName ) } |
---|
812 | ) |
---|
813 | } |
---|
814 | ); |
---|
815 | } |
---|
816 | |
---|
817 | // Generates the code needed for waituntils with an else ( ... ) |
---|
818 | // Checks clauses once after registering for completion and runs them if completes |
---|
819 | // If not enough have run to satisfy predicate after one pass then the else is run |
---|
820 | Stmt * GenerateWaitUntilCore::genElseClauseBranch( const WaitUntilStmt * stmt, string & runName, string & arrName, vector<ClauseData *> & clauseData ) { |
---|
821 | return new CompoundStmt( stmt->else_stmt->location, |
---|
822 | { |
---|
823 | genStatusCheckFor( stmt, clauseData, runName ), |
---|
824 | new IfStmt( stmt->else_stmt->location, |
---|
825 | genNotSatExpr( stmt, runName, arrName ), |
---|
826 | ast::deepCopy( stmt->else_stmt ) |
---|
827 | ) |
---|
828 | } |
---|
829 | ); |
---|
830 | } |
---|
831 | |
---|
832 | Stmt * GenerateWaitUntilCore::genNoElseClauseBranch( const WaitUntilStmt * stmt, string & runName, string & arrName, string & pCountName, vector<ClauseData *> & clauseData ) { |
---|
833 | CompoundStmt * whileBody = new CompoundStmt( stmt->location ); |
---|
834 | const CodeLocation & loc = stmt->location; |
---|
835 | |
---|
836 | // generates: __CFA_maybe_park( &park_counter ); |
---|
837 | whileBody->push_back( |
---|
838 | new ExprStmt( loc, |
---|
839 | new UntypedExpr ( loc, |
---|
840 | new NameExpr( loc, "__CFA_maybe_park" ), |
---|
841 | { new AddressExpr( loc, new NameExpr( loc, pCountName ) ) } |
---|
842 | ) |
---|
843 | ) |
---|
844 | ); |
---|
845 | |
---|
846 | whileBody->push_back( genStatusCheckFor( stmt, clauseData, runName ) ); |
---|
847 | |
---|
848 | return new CompoundStmt( loc, |
---|
849 | { |
---|
850 | new WhileDoStmt( loc, |
---|
851 | genNotSatExpr( stmt, runName, arrName ), |
---|
852 | whileBody, // body |
---|
853 | {} // no inits |
---|
854 | ) |
---|
855 | } |
---|
856 | ); |
---|
857 | } |
---|
858 | |
---|
859 | // generates the following decls for each clause to ensure the target expr and when_cond is only evaluated once |
---|
860 | // typeof(target) & __clause_target_0 = target; |
---|
861 | // bool __when_cond_0 = when_cond; // only generated if when_cond defined |
---|
862 | // select_node clause1; |
---|
863 | void GenerateWaitUntilCore::genClauseInits( const WaitUntilStmt * stmt, vector<ClauseData *> & clauseData, CompoundStmt * body, string & statusName, string & elseWhenName ) { |
---|
864 | ClauseData * currClause; |
---|
865 | for ( vector<ClauseData*>::size_type i = 0; i < stmt->clauses.size(); i++ ) { |
---|
866 | currClause = new ClauseData( i, statusName ); |
---|
867 | currClause->nodeName = namer_node.newName(); |
---|
868 | currClause->targetName = namer_target.newName(); |
---|
869 | currClause->whenName = namer_when.newName(); |
---|
870 | clauseData.push_back(currClause); |
---|
871 | const CodeLocation & cLoc = stmt->clauses.at(i)->location; |
---|
872 | |
---|
873 | // typeof(target) & __clause_target_0 = target; |
---|
874 | body->push_back( |
---|
875 | new DeclStmt( cLoc, |
---|
876 | new ObjectDecl( cLoc, |
---|
877 | currClause->targetName, |
---|
878 | new ReferenceType( |
---|
879 | new TypeofType( new UntypedExpr( cLoc, |
---|
880 | new NameExpr( cLoc, "__CFA_select_get_type" ), |
---|
881 | { ast::deepCopy( stmt->clauses.at(i)->target ) } |
---|
882 | )) |
---|
883 | ), |
---|
884 | new SingleInit( cLoc, ast::deepCopy( stmt->clauses.at(i)->target ) ) |
---|
885 | ) |
---|
886 | ) |
---|
887 | ); |
---|
888 | |
---|
889 | // bool __when_cond_0 = when_cond; // only generated if when_cond defined |
---|
890 | if ( stmt->clauses.at(i)->when_cond ) |
---|
891 | body->push_back( |
---|
892 | new DeclStmt( cLoc, |
---|
893 | new ObjectDecl( cLoc, |
---|
894 | currClause->whenName, |
---|
895 | new BasicType( BasicKind::Bool ), |
---|
896 | new SingleInit( cLoc, ast::deepCopy( stmt->clauses.at(i)->when_cond ) ) |
---|
897 | ) |
---|
898 | ) |
---|
899 | ); |
---|
900 | |
---|
901 | // select_node clause1; |
---|
902 | body->push_back( |
---|
903 | new DeclStmt( cLoc, |
---|
904 | new ObjectDecl( cLoc, |
---|
905 | currClause->nodeName, |
---|
906 | new StructInstType( selectNodeDecl ) |
---|
907 | ) |
---|
908 | ) |
---|
909 | ); |
---|
910 | } |
---|
911 | |
---|
912 | if ( stmt->else_stmt && stmt->else_cond ) { |
---|
913 | body->push_back( |
---|
914 | new DeclStmt( stmt->else_cond->location, |
---|
915 | new ObjectDecl( stmt->else_cond->location, |
---|
916 | elseWhenName, |
---|
917 | new BasicType( BasicKind::Bool ), |
---|
918 | new SingleInit( stmt->else_cond->location, ast::deepCopy( stmt->else_cond ) ) |
---|
919 | ) |
---|
920 | ) |
---|
921 | ); |
---|
922 | } |
---|
923 | } |
---|
924 | |
---|
925 | /* |
---|
926 | if ( clause_status == &clause1 ) ... clause 1 body ... |
---|
927 | ... |
---|
928 | elif ( clause_status == &clausen ) ... clause n body ... |
---|
929 | */ |
---|
930 | Stmt * GenerateWaitUntilCore::buildOrCaseSwitch( const WaitUntilStmt * stmt, string & statusName, vector<ClauseData *> & data ) { |
---|
931 | const CodeLocation & loc = stmt->location; |
---|
932 | |
---|
933 | IfStmt * outerIf = nullptr; |
---|
934 | IfStmt * lastIf = nullptr; |
---|
935 | |
---|
936 | //adds an if/elif clause for each select clause address to run the corresponding clause stmt |
---|
937 | for ( long unsigned int i = 0; i < data.size(); i++ ) { |
---|
938 | const CodeLocation & cLoc = stmt->clauses.at(i)->location; |
---|
939 | |
---|
940 | IfStmt * currIf = new IfStmt( cLoc, |
---|
941 | new UntypedExpr( cLoc, |
---|
942 | new NameExpr( cLoc, "?==?" ), |
---|
943 | { |
---|
944 | new NameExpr( cLoc, statusName ), |
---|
945 | new CastExpr( cLoc, |
---|
946 | new AddressExpr( cLoc, new NameExpr( cLoc, data.at(i)->nodeName ) ), |
---|
947 | new BasicType( BasicKind::LongUnsignedInt ), GeneratedFlag::ExplicitCast |
---|
948 | ) |
---|
949 | } |
---|
950 | ), |
---|
951 | genStmtBlock( stmt->clauses.at(i), data.at(i) ) |
---|
952 | ); |
---|
953 | |
---|
954 | if ( i == 0 ) { |
---|
955 | outerIf = currIf; |
---|
956 | } else { |
---|
957 | // add ifstmt to else of previous stmt |
---|
958 | lastIf->else_ = currIf; |
---|
959 | } |
---|
960 | |
---|
961 | lastIf = currIf; |
---|
962 | } |
---|
963 | |
---|
964 | return new CompoundStmt( loc, |
---|
965 | { |
---|
966 | new ExprStmt( loc, new UntypedExpr( loc, new NameExpr( loc, "park" ) ) ), |
---|
967 | outerIf |
---|
968 | } |
---|
969 | ); |
---|
970 | } |
---|
971 | |
---|
972 | Stmt * GenerateWaitUntilCore::recursiveOrIfGen( const WaitUntilStmt * stmt, vector<ClauseData *> & data, vector<ClauseData*>::size_type idx, string & elseWhenName ) { |
---|
973 | if ( idx == data.size() ) { // base case, gen last else |
---|
974 | const CodeLocation & cLoc = stmt->else_stmt->location; |
---|
975 | if ( !stmt->else_stmt ) // normal non-else gen |
---|
976 | return buildOrCaseSwitch( stmt, data.at(0)->statusName, data ); |
---|
977 | |
---|
978 | Expr * raceFnCall = new UntypedExpr( stmt->location, |
---|
979 | new NameExpr( stmt->location, "__select_node_else_race" ), |
---|
980 | { new NameExpr( stmt->location, data.at(0)->nodeName ) } |
---|
981 | ); |
---|
982 | |
---|
983 | if ( stmt->else_stmt && stmt->else_cond ) { // return else conditional on both when and race |
---|
984 | return new IfStmt( cLoc, |
---|
985 | new LogicalExpr( cLoc, |
---|
986 | new CastExpr( cLoc, |
---|
987 | new NameExpr( cLoc, elseWhenName ), |
---|
988 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
989 | ), |
---|
990 | new CastExpr( cLoc, |
---|
991 | raceFnCall, |
---|
992 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
993 | ), |
---|
994 | LogicalFlag::AndExpr |
---|
995 | ), |
---|
996 | ast::deepCopy( stmt->else_stmt ), |
---|
997 | buildOrCaseSwitch( stmt, data.at(0)->statusName, data ) |
---|
998 | ); |
---|
999 | } |
---|
1000 | |
---|
1001 | // return else conditional on race |
---|
1002 | return new IfStmt( stmt->else_stmt->location, |
---|
1003 | raceFnCall, |
---|
1004 | ast::deepCopy( stmt->else_stmt ), |
---|
1005 | buildOrCaseSwitch( stmt, data.at(0)->statusName, data ) |
---|
1006 | ); |
---|
1007 | } |
---|
1008 | const CodeLocation & cLoc = stmt->clauses.at(idx)->location; |
---|
1009 | |
---|
1010 | Expr * baseCond = genSelectTraitCall( stmt->clauses.at(idx), data.at(idx), "register_select" ); |
---|
1011 | Expr * ifCond; |
---|
1012 | |
---|
1013 | // If we have a when_cond make the register call conditional on it |
---|
1014 | if ( stmt->clauses.at(idx)->when_cond ) { |
---|
1015 | ifCond = new LogicalExpr( cLoc, |
---|
1016 | new CastExpr( cLoc, |
---|
1017 | new NameExpr( cLoc, data.at(idx)->whenName ), |
---|
1018 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1019 | ), |
---|
1020 | new CastExpr( cLoc, |
---|
1021 | baseCond, |
---|
1022 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1023 | ), |
---|
1024 | LogicalFlag::AndExpr |
---|
1025 | ); |
---|
1026 | } else ifCond = baseCond; |
---|
1027 | |
---|
1028 | return new CompoundStmt( cLoc, |
---|
1029 | { // gens: setup_clause( clause1, &status, 0p ); |
---|
1030 | new ExprStmt( cLoc, |
---|
1031 | new UntypedExpr ( cLoc, |
---|
1032 | new NameExpr( cLoc, "setup_clause" ), |
---|
1033 | { |
---|
1034 | new NameExpr( cLoc, data.at(idx)->nodeName ), |
---|
1035 | new AddressExpr( cLoc, new NameExpr( cLoc, data.at(idx)->statusName ) ), |
---|
1036 | ConstantExpr::null( cLoc, new PointerType( new BasicType( BasicKind::SignedInt ) ) ) |
---|
1037 | } |
---|
1038 | ) |
---|
1039 | ), |
---|
1040 | // gens: if (__when_cond && register_select()) { clause body } else { ... recursiveOrIfGen ... } |
---|
1041 | new IfStmt( cLoc, |
---|
1042 | ifCond, |
---|
1043 | genStmtBlock( stmt->clauses.at(idx), data.at(idx) ), |
---|
1044 | recursiveOrIfGen( stmt, data, idx + 1, elseWhenName ) |
---|
1045 | ) |
---|
1046 | } |
---|
1047 | ); |
---|
1048 | } |
---|
1049 | |
---|
1050 | // This gens the special case of an all OR waituntil: |
---|
1051 | /* |
---|
1052 | int status = 0; |
---|
1053 | |
---|
1054 | typeof(target) & __clause_target_0 = target; |
---|
1055 | bool __when_cond_0 = when_cond; // only generated if when_cond defined |
---|
1056 | select_node clause1; |
---|
1057 | ... generate above for rest of clauses ... |
---|
1058 | |
---|
1059 | try { |
---|
1060 | setup_clause( clause1, &status, 0p ); |
---|
1061 | if ( __when_cond_0 && register_select( 1 ) ) { |
---|
1062 | ... clause 1 body ... |
---|
1063 | } else { |
---|
1064 | ... recursively gen for each of n clauses ... |
---|
1065 | setup_clause( clausen, &status, 0p ); |
---|
1066 | if ( __when_cond_n-1 && register_select( n ) ) { |
---|
1067 | ... clause n body ... |
---|
1068 | } else { |
---|
1069 | if ( else_when ) ... else clause body ... |
---|
1070 | else { |
---|
1071 | park(); |
---|
1072 | |
---|
1073 | // after winning the race and before unpark() clause_status is set to be the winning clause index + 1 |
---|
1074 | if ( clause_status == &clause1) ... clause 1 body ... |
---|
1075 | ... |
---|
1076 | elif ( clause_status == &clausen ) ... clause n body ... |
---|
1077 | } |
---|
1078 | } |
---|
1079 | } |
---|
1080 | } |
---|
1081 | finally { |
---|
1082 | if ( __when_cond_1 && clause1.status != 0p) unregister_select( 1 ); // if registered unregister |
---|
1083 | ... |
---|
1084 | if ( __when_cond_n && clausen.status != 0p) unregister_select( n ); |
---|
1085 | } |
---|
1086 | */ |
---|
1087 | Stmt * GenerateWaitUntilCore::genAllOr( const WaitUntilStmt * stmt ) { |
---|
1088 | const CodeLocation & loc = stmt->location; |
---|
1089 | string statusName = namer_status.newName(); |
---|
1090 | string elseWhenName = namer_when.newName(); |
---|
1091 | int numClauses = stmt->clauses.size(); |
---|
1092 | CompoundStmt * body = new CompoundStmt( stmt->location ); |
---|
1093 | |
---|
1094 | // Generates: unsigned long int status = 0; |
---|
1095 | body->push_back( new DeclStmt( loc, |
---|
1096 | new ObjectDecl( loc, |
---|
1097 | statusName, |
---|
1098 | new BasicType( BasicKind::LongUnsignedInt ), |
---|
1099 | new SingleInit( loc, ConstantExpr::from_int( loc, 0 ) ) |
---|
1100 | ) |
---|
1101 | )); |
---|
1102 | |
---|
1103 | vector<ClauseData *> clauseData; |
---|
1104 | genClauseInits( stmt, clauseData, body, statusName, elseWhenName ); |
---|
1105 | |
---|
1106 | vector<int> whenIndices; // track which clauses have whens |
---|
1107 | |
---|
1108 | CompoundStmt * unregisters = new CompoundStmt( loc ); |
---|
1109 | Expr * ifCond; |
---|
1110 | for ( int i = 0; i < numClauses; i++ ) { |
---|
1111 | const CodeLocation & cLoc = stmt->clauses.at(i)->location; |
---|
1112 | // Gens: node.status != 0p |
---|
1113 | UntypedExpr * statusPtrCheck = new UntypedExpr( cLoc, |
---|
1114 | new NameExpr( cLoc, "?!=?" ), |
---|
1115 | { |
---|
1116 | ConstantExpr::null( cLoc, new PointerType( new BasicType( BasicKind::LongUnsignedInt ) ) ), |
---|
1117 | new UntypedExpr( cLoc, |
---|
1118 | new NameExpr( cLoc, "__get_clause_status" ), |
---|
1119 | { new NameExpr( cLoc, clauseData.at(i)->nodeName ) } |
---|
1120 | ) |
---|
1121 | } |
---|
1122 | ); |
---|
1123 | |
---|
1124 | // If we have a when_cond make the unregister call conditional on it |
---|
1125 | if ( stmt->clauses.at(i)->when_cond ) { |
---|
1126 | whenIndices.push_back(i); |
---|
1127 | ifCond = new LogicalExpr( cLoc, |
---|
1128 | new CastExpr( cLoc, |
---|
1129 | new NameExpr( cLoc, clauseData.at(i)->whenName ), |
---|
1130 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1131 | ), |
---|
1132 | new CastExpr( cLoc, |
---|
1133 | statusPtrCheck, |
---|
1134 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1135 | ), |
---|
1136 | LogicalFlag::AndExpr |
---|
1137 | ); |
---|
1138 | } else ifCond = statusPtrCheck; |
---|
1139 | |
---|
1140 | unregisters->push_back( |
---|
1141 | new IfStmt( cLoc, |
---|
1142 | ifCond, |
---|
1143 | new ExprStmt( cLoc, genSelectTraitCall( stmt->clauses.at(i), clauseData.at(i), "unregister_select" ) ) |
---|
1144 | ) |
---|
1145 | ); |
---|
1146 | } |
---|
1147 | |
---|
1148 | if ( whenIndices.empty() || whenIndices.size() != stmt->clauses.size() ) { |
---|
1149 | body->push_back( |
---|
1150 | new ast::TryStmt( loc, |
---|
1151 | new CompoundStmt( loc, { recursiveOrIfGen( stmt, clauseData, 0, elseWhenName ) } ), |
---|
1152 | {}, |
---|
1153 | new ast::FinallyClause( loc, unregisters ) |
---|
1154 | ) |
---|
1155 | ); |
---|
1156 | } else { // If all clauses have whens, we need to skip the waituntil if they are all false |
---|
1157 | Expr * outerIfCond = new NameExpr( loc, clauseData.at( whenIndices.at(0) )->whenName ); |
---|
1158 | Expr * lastExpr = outerIfCond; |
---|
1159 | |
---|
1160 | for ( vector<int>::size_type i = 1; i < whenIndices.size(); i++ ) { |
---|
1161 | outerIfCond = new LogicalExpr( loc, |
---|
1162 | new CastExpr( loc, |
---|
1163 | new NameExpr( loc, clauseData.at( whenIndices.at(i) )->whenName ), |
---|
1164 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1165 | ), |
---|
1166 | new CastExpr( loc, |
---|
1167 | lastExpr, |
---|
1168 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1169 | ), |
---|
1170 | LogicalFlag::OrExpr |
---|
1171 | ); |
---|
1172 | lastExpr = outerIfCond; |
---|
1173 | } |
---|
1174 | |
---|
1175 | body->push_back( |
---|
1176 | new ast::TryStmt( loc, |
---|
1177 | new CompoundStmt( loc, |
---|
1178 | { |
---|
1179 | new IfStmt( loc, |
---|
1180 | outerIfCond, |
---|
1181 | recursiveOrIfGen( stmt, clauseData, 0, elseWhenName ) |
---|
1182 | ) |
---|
1183 | } |
---|
1184 | ), |
---|
1185 | {}, |
---|
1186 | new ast::FinallyClause( loc, unregisters ) |
---|
1187 | ) |
---|
1188 | ); |
---|
1189 | } |
---|
1190 | |
---|
1191 | for ( ClauseData * datum : clauseData ) |
---|
1192 | delete datum; |
---|
1193 | |
---|
1194 | return body; |
---|
1195 | } |
---|
1196 | |
---|
1197 | Stmt * GenerateWaitUntilCore::postvisit( const WaitUntilStmt * stmt ) { |
---|
1198 | if ( !selectNodeDecl ) |
---|
1199 | SemanticError( stmt, "waituntil statement requires #include <waituntil.hfa>" ); |
---|
1200 | |
---|
1201 | // Prep clause tree to figure out how to set initial statuses |
---|
1202 | // setTreeSizes( stmt->predicateTree ); |
---|
1203 | if ( paintWhenTree( stmt->predicateTree ) ) // if this returns true we can special case since tree is all OR's |
---|
1204 | return genAllOr( stmt ); |
---|
1205 | |
---|
1206 | CompoundStmt * tryBody = new CompoundStmt( stmt->location ); |
---|
1207 | CompoundStmt * body = new CompoundStmt( stmt->location ); |
---|
1208 | string statusArrName = namer_status.newName(); |
---|
1209 | string pCountName = namer_park.newName(); |
---|
1210 | string satName = namer_sat.newName(); |
---|
1211 | string runName = namer_run.newName(); |
---|
1212 | string elseWhenName = namer_when.newName(); |
---|
1213 | int numClauses = stmt->clauses.size(); |
---|
1214 | addPredicates( stmt, satName, runName ); |
---|
1215 | |
---|
1216 | const CodeLocation & loc = stmt->location; |
---|
1217 | |
---|
1218 | // Generates: int park_counter = 0; |
---|
1219 | body->push_back( new DeclStmt( loc, |
---|
1220 | new ObjectDecl( loc, |
---|
1221 | pCountName, |
---|
1222 | new BasicType( BasicKind::SignedInt ), |
---|
1223 | new SingleInit( loc, ConstantExpr::from_int( loc, 0 ) ) |
---|
1224 | ) |
---|
1225 | )); |
---|
1226 | |
---|
1227 | // Generates: int clause_statuses[3] = { 0 }; |
---|
1228 | body->push_back( new DeclStmt( loc, |
---|
1229 | new ObjectDecl( loc, |
---|
1230 | statusArrName, |
---|
1231 | new ArrayType( new BasicType( BasicKind::LongUnsignedInt ), ConstantExpr::from_int( loc, numClauses ), LengthFlag::FixedLen, DimensionFlag::DynamicDim ), |
---|
1232 | new ListInit( loc, |
---|
1233 | { |
---|
1234 | new SingleInit( loc, ConstantExpr::from_int( loc, 0 ) ) |
---|
1235 | } |
---|
1236 | ) |
---|
1237 | ) |
---|
1238 | )); |
---|
1239 | |
---|
1240 | vector<ClauseData *> clauseData; |
---|
1241 | genClauseInits( stmt, clauseData, body, statusArrName, elseWhenName ); |
---|
1242 | |
---|
1243 | vector<pair<int, WaitUntilStmt::ClauseNode *>> ambiguousClauses; // list of ambiguous clauses |
---|
1244 | vector<int> andWhenClauses; // list of clauses that have an AND op as a direct parent and when_cond defined |
---|
1245 | |
---|
1246 | collectWhens( stmt->predicateTree, ambiguousClauses, andWhenClauses ); |
---|
1247 | |
---|
1248 | // This is only needed for clauses that have AND as a parent and a when_cond defined |
---|
1249 | // generates: if ( ! when_cond_0 ) clause_statuses_0 = __SELECT_RUN; |
---|
1250 | for ( int idx : andWhenClauses ) { |
---|
1251 | const CodeLocation & cLoc = stmt->clauses.at(idx)->location; |
---|
1252 | body->push_back( |
---|
1253 | new IfStmt( cLoc, |
---|
1254 | new UntypedExpr ( cLoc, |
---|
1255 | new NameExpr( cLoc, "!?" ), |
---|
1256 | { new NameExpr( cLoc, clauseData.at(idx)->whenName ) } |
---|
1257 | ), // IfStmt cond |
---|
1258 | new ExprStmt( cLoc, |
---|
1259 | new UntypedExpr ( cLoc, |
---|
1260 | new NameExpr( cLoc, "?=?" ), |
---|
1261 | { |
---|
1262 | new UntypedExpr ( cLoc, |
---|
1263 | new NameExpr( cLoc, "?[?]" ), |
---|
1264 | { |
---|
1265 | new NameExpr( cLoc, statusArrName ), |
---|
1266 | ConstantExpr::from_int( cLoc, idx ) |
---|
1267 | } |
---|
1268 | ), |
---|
1269 | new NameExpr( cLoc, "__SELECT_RUN" ) |
---|
1270 | } |
---|
1271 | ) |
---|
1272 | ) // IfStmt then |
---|
1273 | ) |
---|
1274 | ); |
---|
1275 | } |
---|
1276 | |
---|
1277 | // Only need to generate conditional initial state setting for ambiguous when clauses |
---|
1278 | if ( !ambiguousClauses.empty() ) { |
---|
1279 | body->push_back( genWhenStateConditions( stmt, clauseData, ambiguousClauses, 0 ) ); |
---|
1280 | } |
---|
1281 | |
---|
1282 | // generates the following for each clause: |
---|
1283 | // setup_clause( clause1, &clause_statuses[0], &park_counter ); |
---|
1284 | // register_select(A, clause1); |
---|
1285 | for ( int i = 0; i < numClauses; i++ ) { |
---|
1286 | setUpClause( stmt->clauses.at(i), clauseData.at(i), pCountName, tryBody ); |
---|
1287 | } |
---|
1288 | |
---|
1289 | // generate satisfy logic based on if there is an else clause and if it is conditional |
---|
1290 | if ( stmt->else_stmt && stmt->else_cond ) { // gen both else/non else branches |
---|
1291 | tryBody->push_back( |
---|
1292 | new IfStmt( stmt->else_cond->location, |
---|
1293 | new NameExpr( stmt->else_cond->location, elseWhenName ), |
---|
1294 | genElseClauseBranch( stmt, runName, statusArrName, clauseData ), |
---|
1295 | genNoElseClauseBranch( stmt, runName, statusArrName, pCountName, clauseData ) |
---|
1296 | ) |
---|
1297 | ); |
---|
1298 | } else if ( !stmt->else_stmt ) { // normal gen |
---|
1299 | tryBody->push_back( genNoElseClauseBranch( stmt, runName, statusArrName, pCountName, clauseData ) ); |
---|
1300 | } else { // generate just else |
---|
1301 | tryBody->push_back( genElseClauseBranch( stmt, runName, statusArrName, clauseData ) ); |
---|
1302 | } |
---|
1303 | |
---|
1304 | // Collection of unregister calls on resources to be put in finally clause |
---|
1305 | // for each clause: |
---|
1306 | // if ( !__CFA_has_clause_run( clause_statuses[i] )) && unregister_select( ... , clausei ) ) { ... clausei stmt ... } |
---|
1307 | // OR if when( ... ) defined on resource |
---|
1308 | // if ( when_cond_i && (!__CFA_has_clause_run( clause_statuses[i] )) && unregister_select( ... , clausei ) ) { ... clausei stmt ... } |
---|
1309 | CompoundStmt * unregisters = new CompoundStmt( loc ); |
---|
1310 | |
---|
1311 | Expr * statusExpr; // !__CFA_has_clause_run( clause_statuses[i] ) |
---|
1312 | for ( int i = 0; i < numClauses; i++ ) { |
---|
1313 | const CodeLocation & cLoc = stmt->clauses.at(i)->location; |
---|
1314 | |
---|
1315 | // Generates: !__CFA_has_clause_run( clause_statuses[i] ) |
---|
1316 | statusExpr = new UntypedExpr ( cLoc, |
---|
1317 | new NameExpr( cLoc, "!?" ), |
---|
1318 | { |
---|
1319 | new UntypedExpr ( cLoc, |
---|
1320 | new NameExpr( cLoc, "__CFA_has_clause_run" ), |
---|
1321 | { |
---|
1322 | genArrAccessExpr( cLoc, i, statusArrName ) |
---|
1323 | } |
---|
1324 | ) |
---|
1325 | } |
---|
1326 | ); |
---|
1327 | |
---|
1328 | // Generates: |
---|
1329 | // (!__CFA_has_clause_run( clause_statuses[i] )) && unregister_select( ... , clausei ); |
---|
1330 | statusExpr = new LogicalExpr( cLoc, |
---|
1331 | new CastExpr( cLoc, |
---|
1332 | statusExpr, |
---|
1333 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1334 | ), |
---|
1335 | new CastExpr( cLoc, |
---|
1336 | genSelectTraitCall( stmt->clauses.at(i), clauseData.at(i), "unregister_select" ), |
---|
1337 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1338 | ), |
---|
1339 | LogicalFlag::AndExpr |
---|
1340 | ); |
---|
1341 | |
---|
1342 | // if when cond defined generates: |
---|
1343 | // when_cond_i && (!__CFA_has_clause_run( clause_statuses[i] )) && unregister_select( ... , clausei ); |
---|
1344 | if ( stmt->clauses.at(i)->when_cond ) |
---|
1345 | statusExpr = new LogicalExpr( cLoc, |
---|
1346 | new CastExpr( cLoc, |
---|
1347 | new NameExpr( cLoc, clauseData.at(i)->whenName ), |
---|
1348 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1349 | ), |
---|
1350 | new CastExpr( cLoc, |
---|
1351 | statusExpr, |
---|
1352 | new BasicType( BasicKind::Bool ), GeneratedFlag::ExplicitCast |
---|
1353 | ), |
---|
1354 | LogicalFlag::AndExpr |
---|
1355 | ); |
---|
1356 | |
---|
1357 | // generates: |
---|
1358 | // if ( statusExpr ) { ... clausei stmt ... } |
---|
1359 | unregisters->push_back( |
---|
1360 | new IfStmt( cLoc, |
---|
1361 | statusExpr, |
---|
1362 | new CompoundStmt( cLoc, |
---|
1363 | { |
---|
1364 | new IfStmt( cLoc, |
---|
1365 | genSelectTraitCall( stmt->clauses.at(i), clauseData.at(i), "on_selected" ), |
---|
1366 | ast::deepCopy( stmt->clauses.at(i)->stmt ) |
---|
1367 | ) |
---|
1368 | } |
---|
1369 | ) |
---|
1370 | ) |
---|
1371 | ); |
---|
1372 | |
---|
1373 | // // generates: |
---|
1374 | // // if ( statusExpr ) { ... clausei stmt ... } |
---|
1375 | // unregisters->push_back( |
---|
1376 | // new IfStmt( cLoc, |
---|
1377 | // statusExpr, |
---|
1378 | // genStmtBlock( stmt->clauses.at(i), clauseData.at(i) ) |
---|
1379 | // ) |
---|
1380 | // ); |
---|
1381 | } |
---|
1382 | |
---|
1383 | body->push_back( |
---|
1384 | new ast::TryStmt( |
---|
1385 | loc, |
---|
1386 | tryBody, |
---|
1387 | {}, |
---|
1388 | new ast::FinallyClause( loc, unregisters ) |
---|
1389 | ) |
---|
1390 | ); |
---|
1391 | |
---|
1392 | for ( ClauseData * datum : clauseData ) |
---|
1393 | delete datum; |
---|
1394 | |
---|
1395 | return body; |
---|
1396 | } |
---|
1397 | |
---|
1398 | // To add the predicates at global scope we need to do it in a second pass |
---|
1399 | // Predicates are added after "struct select_node { ... };" |
---|
1400 | class AddPredicateDecls final : public WithDeclsToAdd { |
---|
1401 | vector<FunctionDecl *> & satFns; |
---|
1402 | const StructDecl * selectNodeDecl = nullptr; |
---|
1403 | |
---|
1404 | public: |
---|
1405 | void previsit( const StructDecl * decl ) { |
---|
1406 | if ( !decl->body ) { |
---|
1407 | return; |
---|
1408 | } else if ( "select_node" == decl->name ) { |
---|
1409 | assert( !selectNodeDecl ); |
---|
1410 | selectNodeDecl = decl; |
---|
1411 | for ( FunctionDecl * fn : satFns ) |
---|
1412 | declsToAddAfter.push_back(fn); |
---|
1413 | } |
---|
1414 | } |
---|
1415 | AddPredicateDecls( vector<FunctionDecl *> & satFns ): satFns(satFns) {} |
---|
1416 | }; |
---|
1417 | |
---|
1418 | void generateWaitUntil( TranslationUnit & translationUnit ) { |
---|
1419 | vector<FunctionDecl *> satFns; |
---|
1420 | Pass<GenerateWaitUntilCore>::run( translationUnit, satFns ); |
---|
1421 | Pass<AddPredicateDecls>::run( translationUnit, satFns ); |
---|
1422 | } |
---|
1423 | |
---|
1424 | } // namespace Concurrency |
---|
1425 | |
---|
1426 | // Local Variables: // |
---|
1427 | // tab-width: 4 // |
---|
1428 | // mode: c++ // |
---|
1429 | // compile-command: "make install" // |
---|
1430 | // End: // |
---|